Entries |
Document | Title | Date |
20080198428 | Optical element and method for manufacturing the same - Hologram recording medium is manufactured by using computer. On a recording plane | 08-21-2008 |
20080204833 | APPARATUS AND METHOD FOR RECORDING FRESNEL HOLOGRAMS - An apparatus for producing a hologram of an object includes a light source that emits an incoherent electromagnetic wave toward the object, and a masking device configured to display a mask, receive the incoherent electromagnetic wave emitted toward the object, mask the received incoherent electromagnetic wave according to the displayed mask, and produce a masked electromagnetic wave. The apparatus also includes an image recording device configured to capture an image of the masked electromagnetic wave, and a processing device configured to convert the image of the masked electromagnetic wave into the hologram of the object. A method for producing a hologram of an object is also described. | 08-28-2008 |
20080204834 | Displaying holographic images - There is provided a method of displaying a holographic image, the method comprises a number of steps. Three-dimensional object data is manipulated ( | 08-28-2008 |
20080218817 | SYSTEM AND METHOD FOR MAKING SEAMLESS HOLOGRAMS, OPTICALLY VARIABLE DEVICES AND EMBOSSING SUBSTRATES - Apparatus and method for producing optically variable devices, optically variable media, dot matrix holograms or embossing substrates. The system includes: a laser beam generator, a laser beam shaper, a spatial light modulator, imaging optics and an image positioner. The laser beam generator generates a laser beam, which is shaped by the laser beam shaper to modify the laser beam to an optimized beam profile. The shaped laser beam is modulated by the spatial light modulator, which generates, at a place removed from the substrate surface, an optical pattern. The imaging optics causes the optical pattern to be imaged on the substrate surface. An image positioner allows for the optical pattern to be positioned to different areas of the substrate surface. The system can produce adapted optically variable devices, optically variable media, dot matrix holograms or embossing substrates | 09-11-2008 |
20080225359 | Computer Hologram and Creation Method Thereof - An original image ( | 09-18-2008 |
20080247012 | VARIABLE OPTICAL PHASE MODULATOR - A variable optical phase modulator includes an array of movable, micro-electromechanical conductive plates. Each conductive plate has a substantially reflective surface, and is responsive to an applied voltage to move the conductive plate normal to a plane of the array to a predetermined distance with respect to other conductive plates in the array. The phase modulator also includes a voltage controller associated with the array of conductive plates. The voltage controller supplies a voltage to at least one of the movable conductive plates to move and position the movable plate to change the phase of electromagnetic energy reflected from the reflective surface with respect to the phase of electromagnetic energy reflected from other conductive plates in the array. | 10-09-2008 |
20080247013 | IMAGE TRANSFER APPARATUS - An apparatus includes a light source configured to provide a path of light and a spatial light modulator located in the path of light and configured to modulate the light source. Relay optics are configured to receive the modulated light from the spatial light modulator and to project a computer generated image to a nominal image plane. The light source is configured to illuminate the spatial light modulator with collimated light. | 10-09-2008 |
20080252950 | Video Hologram and Device for Reconstructing Video Holograms for Large Objects - A video holographic display device operates so that the size of a reconstructed three dimensional scene is a function of the size of the hologram-bearing medium; the reconstructed three dimensional scene can then be anywhere within a volume defined by the hologram-bearing medium and a virtual observer window through which the reconstructed three dimensional scene must be viewed. This contrasts with conventional holograms, in which the size of the reconstructed scene is localised to a far smaller volume and is not a function of the size of the hologram-bearing medium at all. | 10-16-2008 |
20080259419 | COMPUTER GENERATED HOLOGRAM - A three dimensional display apparatus includes a diffraction panel for displaying a computer generated hologram and a look-up table. The look-up table includes a plurality of phase entries corresponding to a plurality of image points within a three dimensional image replay volume of the computer generated hologram. The apparatus further includes one or more processors configured to notionally divide the computer generated hologram into one or more hogels and to calculate diffraction fringe information for at least one of the hogels based on a selection of the phase entries. | 10-23-2008 |
20080278780 | HOLOGRAPHIC IMAGING SYSTEMS - A holographic imaging system includes an electrical addressable spatial light modulator (EASLM) and an optically addressable spatial light modulator (OASLM). A read light is configured to illuminate the OASLM, and a controller is configured to address the EASLM with both positive and negative sub-images and transmit the positive and negative sub-images to the OASLM. The controller is further configured to address the OASLM with an operating voltage, wherein the read light generates a holographic image comprised of diffraction patterns from the positive and negative sub-images. | 11-13-2008 |
20090002787 | Holographic Display Devices - This invention relates to electronic devices incorporating a holographic projector. A holographic projection module for a consumer electronic device, the holographic projection module comprising: at least one substantially monochromatic light source ( | 01-01-2009 |
20090009834 | OPTICAL PHASE PROCESSING IN A SCATTERING MEDIUM - An optical phase processing system for a scattering medium. A first beam has a direction and a wavefront and the first beam is configured to enter a holographic recording medium. A scattering medium is illuminated by a signal beam generating at least one scattered beam. An interference pattern is recorded from the at least one scattered beam and the first beam. A second beam is generated in a direction opposite to the direction of the first beam, the second beam having a wavefront and a phase substantially opposite to a phase of the wavefront of the first beam, and the second beam is configured to enter the holographic recording medium. The second beam and the interference pattern interact to generate at least one reconstructed beam having a phase substantially opposite to a phase of the at least one scattered beam, and the at least one reconstructed beam is configured to be viewable through the scattering medium. | 01-08-2009 |
20090034036 | COMPUTER GENERATED HOLOGRAM, EXPOSURE APPARATUS, AND DEVICE FABRICATION METHOD - The present invention provides a computer generated hologram which forms a light intensity distribution on a predetermined plane by giving a phase distribution to a wavefront of incident light, comprising an anisotropic layer whose refractive index with respect to linearly polarized light in a first direction is different from a refractive index of the anisotropic layer with respect to linearly polarized light in a second direction perpendicular to the linearly polarized light in the first direction, and an isotropic layer whose refractive index with respect to the linearly polarized light in the first direction is equal to a refractive index of the isotropic layer with respect to the linearly polarized light in the second direction. | 02-05-2009 |
20090073521 | Holographic Method With Numerical Reconstruction for Obtaining an Image of a Three-Dimensional Object Which Even Points out of the Depth of Field Are in Focus, and Holographic Apparatus Using Such a Method - The invention concerns a holographic method with numerical reconstruction for obtaining an image of a three-dimensional object, said method employing a digitalised hologram of an object, and comprising a step A. wherein, starting from the digitalised hologram, extracting a phase image of said object corresponding to a bidimensional matrix MD of distance values; a step B. wherein a mono-dimensional subassembly SD of the distance value assembly present in matrix MD of the method step A is selected, subassembly SD containing distance values dk; a step C. wherein for each distance value dk, extracting from matrix MD a iso-level assembly IQdk corresponding to a mono-dimensional assembly of bidimensional coordinates of said object, a step D. wherein for each distance value dk, reconstructing, starting from the digitalised hologram, a bidimensional matrix IMdk of intensity values relevant to said object; a step E. wherein, from each bidimensional matrix IMdk a bidimensional matrix IFdk of intensity values is extracted corresponding to the bidimensional coordinates of the iso-level assembly IQdk; a step F. wherein, starting from intensity values IFdk from the bidimensional coordinates of the iso-level assembly IQdk and from the relevant distance values dk, reconstructing the three-dimensional intensity image of said object, and wherein the resolution of the bidimensional matrix IMdk for all values of k is identical to the resolution of matrix MD of distance values. | 03-19-2009 |
20090086296 | Holographic Projector for Enlarging a Reconstruction Zone - This invention relates to a holographic projection device with an array of mirror elements in the form of micro-mirrors. The holographic projection device comprises at least one light modulator device, which contains the array of mirror elements, for an enlargement of a reconstruction space for a reconstructed scene. Each mirror element is coupled with at least one actuator. The actuators tilt the corresponding mirror elements and/or displace them axially in at least one direction. Thereby, a wave front for the representation of a reconstructed scene is directly modulated. The holographic projection device comprises an optical system for the projection of the modulated wave front into at least one observer window in an observer plane. | 04-02-2009 |
20090103151 | HOLOGRAPHIC PROJECTION METHOD AND HOLOGRAPHIC PROJECTION DEVICE - According to the present invention, video image data is converted into spatial frequency information using Fourier transformation. The spatial frequency information is provided to information display unit. The spatial frequency information as a phase distribution is displayed on the information display unit, light is irradiated onto the information display unit using a light source, the amount of light that is irradiated by the light source is adjusted based on the video image data. And diffraction light, which is irradiated by the light source and modulated as the spatial frequency information by the information display unit is projected onto projecting unit. | 04-23-2009 |
20090128872 | Method of forming an image and image projection device - A method of forming an image comprising providing a device for imparting respective phase shifts to different regions of an incident wavefront, wherein the phase shifts give rise to an image in a replay field, and causing zero-order light to be focused into a region between the replay field and the device. | 05-21-2009 |
20090180165 | Method for the Compensation of an Inhomogeneous Brightness Perception in Holographically Reconstructed Scenes - To compensate for an inhomogeneous brightness perception in a holographic reconstruction of 3D-scenes ( | 07-16-2009 |
20090185246 | FABRICATION PROCESS FOR COMPUTER-GENERATED HOLOGRAMS, COMPUTER-GENERATED HOLOGRAM FABRICATED BY THAT PROCESS, AND COMPUTER-GENERATED HOLOGRAM - The invention provides a fabrication process for a computer-generated hologram | 07-23-2009 |
20090207466 | HOLOGRAPHIC DISPLAY DEVICES - This invention relates to optical systems for holographic projectors. We describe a holographic image projection system, the system including: a spatial light modulator (SLM) for displaying a hologram; first optics to provide an input beam to said SLM; second optics to process an output beam from said SLM to provide a displayed image; and a hologram processor to receive image data for display and to output data to said SLM to display a hologram to provide said displayed image; and wherein at least one lens of said first optics or said second optics is encoded in said hologram. | 08-20-2009 |
20090219589 | Three-dimensional image display and three-dimensional image displaying method - The present invention relates to a three-dimensional image displaying apparatus, or the like, that has a simple structure capable of displaying a high-quality reconstruction image by effectively making use of the focusing function of the observer's eyes. The three-dimensional image displaying apparatus comprises a spatial light modulation element, an illumination optical system, and a lens as a reconstruction image converting optical system. At least one of the bright point interval and initial phase values of the respective bright points constituting a target reconstruction image to be displayed is set such that peaks of the reconstruction light reaching a region, where the observation of reconstruction image obtained through diffraction of a specified order in the spatial light modulation element is permitted, are produced at different plural points on the back focal plane of the lens. As a result, a hologram capable of displaying the target reconstruction image is expressed by the spatial light modulation element. The amplitude or phase of the illumination light that enters the spatial light modulation element expressing the hologram is modulated by each pixel. The modulated light, that is, the reconstruction light is wavefront-converted by the lens and thereby the reconstruction image is formed. The observer, whose eye pupil is disposed close to the aperture portion of the mask, can observe a displayed reconstruction image through the aperture portion and a half mirror. | 09-03-2009 |
20090219590 | METHOD AND APPARATUS FOR THE PRODUCTION OF POLARIZATION HOLOGRAMS - The present invention relates to a method for the production of polarization holograms, an apparatus for the production of polarization holograms and the use of the polarization holograms according to the invention as data stores, security features or diffractive optical elements for performing conventional optical functions. | 09-03-2009 |
20090219591 | METHODS AND APPARATUS FOR DISPLAYING COLOUR IMAGES USING HOLOGRAMS - We describe a method of projecting a colour image on a screen holographically. The method includes: inputting colour image data including data for at least two colour planes of said image, a first, longer wavelength colour plane and a second, shorter wavelength colour plane; generating data for respective first and second holograms from said first and second colour planes, said first hologram having a greater resolution than said second hologram; and displaying said first and second holograms in turn on a common spatial light modulator (SLM) illuminated by light of respective said first and second wavelengths to project said colour image onto said screen; and wherein a scaling in resolution between said first and second holograms is dependent on scaling between said first and second wavelengths such that, when projected on said screen pixels of said image generated by said first and second holograms have substantially the same pitch. | 09-03-2009 |
20090219592 | FABRICATION PROCESS FOR CHOLESTERIC LIQUID CRYSTAL MEDIA HAVING A VOLUME HOLOGRAM - The invention provides a process capable of fabricating a cholesteric liquid crystal medium having a volume hologram with efficiency yet without recourse to complicated steps such as an alignment step. This is achievable as follows. A volume hologram layer is formed on a substrate, and a cholesteric liquid crystal layer is then formed on another substrate comprising a center substrate film that is subjected to bondable treatment. The volume hologram layer is applied to the center substrate film that is subjected to bondable treatment, and placed in a state where the volume hologram layer and cholesteric liquid crystal layer are laminated together via the substrate. The substrate is peeled off the volume hologram layer, and an adhesive layer is formed on the surface of the volume hologram layer off which the substrate is peeled off, followed by the provision of the substrate on the adhesive layer. Finally, the multilayer structure is shaped into a label form of cholesteric liquid crystal medium having a volume hologram layer. | 09-03-2009 |
20090231649 | Intraoral Imaging System and Method based on Conoscopic Holography - A conoscopic holographic system and a method for imaging a scene characterized by a surface having a three-dimensional shape. The system utilizes an optical source, which illuminates the scene with substantially linear distributions of light, and independent register of a plurality of elementary conoscopic holograms in the image plane. Each elementary conoscopic hologram represents the imaging of a single emitting point of the illuminated scene. The optical source is translated relative to the scene to generate a sequence of optical holograms, and a weighted reconstruction of the holograms is performed, in a computer process, at a median plane to devise the three-dimensional shape of the imaged scene. | 09-17-2009 |
20090237759 | Display system for reproducing medical holograms - The invention relates to a display system for diagnostic image systems for reproducing three-dimensional medical images. The display system has at least one holographic projection facility that is connected to the diagnostic image system. The projection device reproduces a hologram of the three-dimensional medical images in an examination or intervention room. | 09-24-2009 |
20090244665 | COMPUTER-GENERATED HOLOGRAM - For the purpose of preparing a computer-generated hologram, which has very high resolution and many numbers of parallaxes, the present invention provides a computer-generated holographic stereogram, wherein a virtual point light source group ( | 10-01-2009 |
20090257104 | Hologram Viewing Arrangement and Alignment Device - The present invention relates to a hologram viewing arrangement, to an alignment device, to a display device, to a device for aligning first and second members and to a device for aligning an optical beam with a desired target. A hologram viewing arrangement comprising a pixellated phase mask substrate ( | 10-15-2009 |
20090290203 | Method and Device for Computing Computer-Generated Video Holograms - The data defining an object to be holographically reconstructed is first arranged into a number of virtual section layers, each layer defining a two-dimensional object data sets, such that a video hologram data set can be calculated from some or all of these two-dimensional object data sets. The first step is to transform each two-dimensional object data set to a two-dimensional wave field distribution. This wave field distribution is calculated for a virtual observer window in a reference layer at a finite distance from the video hologram layer. Next, the calculated two-dimensional wave field distributions for the virtual observer window, for all two-dimensional object data sets of section layers, are added to define an aggregated observer window data set. Then, the aggregated observer window data set is transformed from the reference layer to the video hologram layer, to generate the video hologram data set for the computer-generated video hologram. | 11-26-2009 |
20090296176 | Method and Device for Reducing Speckle - A method for reducing speckle patterns of a three-dimensional holographic reconstruction is disclosed. A controllable light modulator into which a hologram of a three-dimensional scene is coded is illuminated by coherent light, a reconstruction lens transforms the modulated light into an eye position and reconstructs the three-dimensional scene in a reconstruction space and a control means controls the illumination. This provides a holographic reproduction device in which the speckle patterns occurring during reconstruction of a three-dimensional scene are reduced. According to one embodiment, a next-to-real time method is presented using a carrier medium of conventional image refresh rate. | 12-03-2009 |
20090303559 | SYSTEM, APPARATUS AND METHOD FOR EXTRACTING THREE-DIMENSIONAL INFORMATION OF AN OBJECT FROM RECEIVED ELECTROMAGNETIC RADIATION - An apparatus and method to produce a hologram of an object includes an electromagnetic radiation assembly configured to receive a received electromagnetic radiation, such as light, from the object. The electromagnetic radiation assembly is further configured to diffract the received electromagnetic radiation and transmit a diffracted electromagnetic radiation. An image capture assembly is configured to capture an image of the diffracted electromagnetic radiation and produce the hologram of the object from the captured image. | 12-10-2009 |
20090310197 | Reflective Optical System, Tracking System and Holographic Projection System and Method - The invention relates to an optical reflection system with a reflection element for reflecting reconstruction light waves, an entry-side focal point, from which the reconstruction light waves come when they hit the reflection element, and an exit-side focal point, to which the reconstruction light waves propagate after being reflected from the reflection element. The invention further relates to a tracking system and a holographic projection system with such optical reflection system, and a corresponding holographic projection method. In order to achieve with such an optical reflection system an aberration correction and a tracking of the visibility region and a reconstruction larger than with prior art devices, the optical reflection system according to this invention comprises a deflection element with optically controllable deflection properties and a deflection control means for optically controlling the deflection properties of the deflection element which controls the position of at least the exit-side focal point of the optical reflection system. | 12-17-2009 |
20090316239 | RECORDING APPARATUS AND RECORDING METHOD - A recording apparatus includes a drive unit that rotationally drives a holographic recording medium including a recording layer and a track forming layer that includes guide tracks formed at constant intervals in a radial direction, where a signal beam and a reference beam are emitted to the recording layer so that a hologram is recorded in accordance with the signal beam, a signal beam generating unit, a reference beam generating unit, a recording unit that emits the signal beam and reference beam into the medium and records the hologram, a rotation control unit that controls the drive unit so that the medium is rotationally driven at a constant rotation speed, and a recording control unit that selects some of the guide tracks so that radial-direction recording intervals of the holograms are statistically decreased towards the outer periphery and controls the recording unit to record the holograms along the selected tracks. | 12-24-2009 |
20100014134 | HOLOGRAPHIC IMAGE DISPLAY SYSTEM - This invention relates to holographic image display systems, and to related methods and processor control code. We describe a method of displaying an image holographically, the method including: inputting display image data defining said image for display; processing said image data to determine first image data representing a first spatial frequency portion of said image data and second image data representing a second spatial frequency portion of said image data, wherein said second spatial frequency is higher than said first spatial frequency; displaying a hologram of said first image data on a spatial light modulator (SLM) to form a holographically-generated intermediate real image; modulating said intermediate real image using said second image data to display said image. | 01-21-2010 |
20100014135 | FABRICATION METHOD FOR A COMPUTER-GENERATED HOLOGRAM OR A HOLOGRAPHIC STEREOGRAM IN WHICH A THREE-DIMENSIONAL OBJECT HAVING VISUALIZED CROSS-SECTIONAL SURFACES IS RECORDED, AND COMPUTER-GENERATED HOLOGRAM/HOLOGRAPHIC STEREOGRAM IN WHICH A THREE-DIMENSIONAL OBJECT HAVING VISUALIZED CROSS-SECTIONAL SURFACES IS RECORDED - The present invention relates to a method for fabricating a computer-generated hologram or a holographic stereogram which can reconstruct a three-dimensional object having visualized cross-sectional surfaces, wherein the three-dimensional object composed only of surface data is processed to have the visualized cross-sectional surfaces on a given cross section thereof by adding surface data to the cross-sectional surfaces. The method includes a step (ST | 01-21-2010 |
20100027083 | COMPACT HOLOGRAPHIC DISPLAY DEVICE - A holographic display device comprises a first OLED array writing onto a first OASLM, the first OLED array and the first OASLM forming adjacent layers, and a second OLED array writing onto a second OASLM, the second OLED array and the second OASLM forming adjacent layers. The first and the second OASLMs encode a hologram and a holographic reconstruction is generated by the device when an array of read beams illuminates the first and second OASLMs and the first and second OASLMs are suitably controlled by the first and second OLED arrays. Advantages include that this device permits independent control of phase and amplitude, and the device lends itself to compactness. | 02-04-2010 |
20100033780 | Method for Generating Computer-Generated Video Holograms in Real Time by Means of Propagation - The invention relates to a method for generating video holograms in real time for a holographic reproduction device using at least one light modulator means in which a scene split into object points is encoded as a whole hologram in the form of the reconstruction of a visibility region in a periodicity interval of the reconstruction of the video hologram. The reconstruction of an individual object point (OP) only requires part of the whole hologram encoded on the light modulator means. The invention is characterised in that, for each object point, the contributions for propagation of the light waves in the visibility region can be determined from at least one look-up table. | 02-11-2010 |
20100033781 | Method and Apparatus for Encoding Computer-Generated Holograms in Pixelated Light Modulators - The object is to largely eliminate the errors which arise in the reconstruction of a hologram, calculated point by point, as a result of the encoding of said hologram into pixels of finite extent. The invention achieves the object by means of a method in which the common wavefront calculated from the object sectional planes is multiplied by the inverse transform of the pixel shape and pixel transparency in the viewer's window before the wavefront modified by the multiplication is transformed to the hologram plane and encoded as an amplitude and/or phase distribution of the hologram in the pixels of the light modulator. This method is implemented in a corresponding apparatus which contains an additional memory unit for providing a Fourier transform or its inverse Fourier transform and also a multiplication unit. | 02-11-2010 |
20100033782 | Optical Wave Correction for a Holographic Projection System - A holographic projection system with an optical wave tracking system sets the propagation direction of a modulated wave uses a position control system and an eye finder. It provides an adjustable optical wave correction system which compensates for deformations of the wave which are dependent on the current eye position. Largely dynamic changes and deformations in the form structure of the modulated and conditioned wave are reduced, which result from changes in the propagation direction of the aligned, optically enlarged and modulated wave on a focusing display screen. The optical wave correction system includes adjustable wave form means and computer means which set the optical behaviour of the wave form means using the positional data from the current eye position. The adjustable wave form means are located in the light path between an illuminating system for the spatial light modulation means and the display screen of the projection system. | 02-11-2010 |
20100033783 | Enhanced Environment Visualization Using Holographic Stereograms - Hologram production techniques can combine source data representing realistic information describing an environment with source data providing representational information describing a feature of the environment and/or some object interacting with the environment. The combined data is used to produce holograms, and particularly holographic stereograms including features that enhance the visualization of the environment depicted in hologram. A haptic interface can be used in conjunction with such holograms to further aid use of the hologram, and to provide an interface to secondary information provided by a computer and related to the images depicted in the hologram. | 02-11-2010 |
20100039686 | HOLOGRAM PATTERN GENERATION METHOD AND MULTIPLE LIGHT POINTS GENERATION APPARATUS - In order to change the number of light points and light intensities and to move positions of the light points in a real-time manner, an extremely large capacity of a memory is required. In a method according to the present invention, a memory ( | 02-18-2010 |
20100046049 | COMPACT HOLOGRAPHIC DISPLAY DEVICE - A holographic display device comprises an OLED array writing onto an OASLM, the OLED array and OASLM forming adjacent layers. The OASLM encodes a hologram and a holographic reconstruction is then generated by the device when an array of read beams illuminates the OASLM. The OASLM is suitably controlled by the OLED array. An advantage of the device is that it lends itself to compactness. | 02-25-2010 |
20100046050 | COMPACT HOLOGRAPHIC DISPLAY DEVICE - Holographic display device comprising a first EASLM and a second EASLM, the pair permitting independent modification of phase and amplitude, in which holographic reconstruction is visible through one or more virtual observer windows. An advantage is that an observer may view a holographic reconstruction through one or more virtual observer windows from a device housing a pair of EASLMs which permit independent modification of phase and amplitude. | 02-25-2010 |
20100046051 | GENERATION OF A HOLOGRAM PATTERN - Device for generating a hologram pattern including selecting means for selecting, as cross section ranges which are in a plurality of cross sections parallel to hologram pattern in 3D object and which are ranges used for generating hologram pattern, cross section ranges which overlap ranges in other cross sections when the relevant cross section is perspectively seen from a predetermined observation point on the hologram pattern; depth integrating means for calculating, for lattice points in one cross section range, a depth integral function acquired by integrating an inverse diffraction function for determining hologram pattern for displaying points of 3D object with respect to respective lattice points in the cross section ranges which overlap the relevant lattice point; and inverse Fourier transform means for generating hologram pattern by performing two-dimensional inverse transform on depth integral functions with respect to plurality of lattice points in one cross section range. | 02-25-2010 |
20100067075 | Method for Rendering and Generating Computer-Generated Video Holograms in Real-Time - Method for real-time rendering and generating of computer-generated video holograms from three-dimensional image data with depth information, where the position and viewing direction of an observer defines a view of the scene, and where the observer is assigned with at least one virtual observer window, which is situated in an observer plane near the observer eyes, comprising the following process steps: 3D rendering and generation of the depth map of scene section data between two parallel section planes, which are disposed at right angles to the viewing direction of the observer, transformation of the scene section data, repetition of the steps of 3D rendering and transformation, Back-transformation, encoding in pixel values in order to reconstruct the three-dimensional scene. | 03-18-2010 |
20100073744 | Method for Generating Video Holograms in Real Time by Means of Subholograms - A method for generating video holograms in real time for a holographic playback device comprising at least one light modulator means, into which a scene divided into object points is encoded as an entire hologram and can be seen as a reconstruction from a visibility region, which is located within a periodicity interval of the reconstruction of the video hologram, the visibility region defining a sub-hologram together with each object point of the scene to be reconstructed, and the entire hologram being generated from a superposition of contributions of sub-holograms, is characterized in that for each object point the contributions of the sub-holograms in the entire reconstruction of the scene can be determined from at least one look-up table. | 03-25-2010 |
20100073745 | HOLOGRAM FABRICATION PROCESS, AND HOLOGRAM FABRICATED BY THAT PROCESS - The invention provides a hologram fabrication process, characterized by comprising steps of fabricating a computer-generated hologram (CGH) having amplitude information and phase information recorded by computer operation on a given recording surface, irradiating the computer-generated hologram (CGH) with the first reconstructing illumination light ( | 03-25-2010 |
20100073746 | HOLOGRAM AND HOLGRAPHIC VIEWING DEVICE INCORPORATING IT - The invention relates to a hologram that enables two or more different images to be simultaneously reconstructed even in a state where the hologram is fixed in terms of relative position with respect to an eye, and a holographic viewing device that incorporates it. The hologram | 03-25-2010 |
20100079830 | DEVICE FOR OPTICALLY DETECTING POSITION AND/OR ORIENTATION OF OBJECTS AND ASSOCIATED DETECTION METHODS - The present invention relates to a device for optically detecting position and/or attitude of an object ( | 04-01-2010 |
20100079831 | Holographic Projection Device for Magnifying a Visibility Region - A holographic projection apparatus and a method is disclosed for magnifying a virtual visibility region, for observing a reconstructed scene with at least one light modulation device and with at least one light source having sufficiently coherent light for generating a wavefront of a scene that is coded in the light modulation device. By means of imaging the wavefront into a viewer plane, it is possible to generate the virtual visibility region for observing the reconstructed scene. The virtual visibility region has at least two virtual viewer windows. In this case, the virtual viewer windows are dimensioned such that the reconstructed scene can always be observed without tracking of the viewer windows upon movement of a viewer in the viewer plane. | 04-01-2010 |
20100079832 | LASER PROCESSING APPARATUS AND LASER PROCESSING METHOD - A laser processing apparatus 1 includes a laser light source | 04-01-2010 |
20100097671 | Head-Mounted Display Device for Generating Reconstructions of Three-Dimensional Representations - A head-mounted display device for generating reconstructions of three-dimensional representations comprising a frame, in which at least one light source, at least one optical system and at least one encodable light modulator are situated, wherein the light modulator with an encoding of a wavefront of the three-dimensional representation in the encoding area is positioned at the place of an observer window defined in an observer plane or the light modulator with an encoding of a hologram of the wavefront of the three-dimensional representation in the encoding area is positioned in the region closely in front of the observer window for transforming the hologram into the observer window. When the light modulators are illuminated, complex wavefronts of the three-dimensional representation are situated in the observer window and the reconstruction of the three-dimensional representation is visible in a visual cone spanned by the observer window and the light modulator. | 04-22-2010 |
20100097672 | Method and Device for Reducing Speckle - A method for reducing speckle patterns of a three-dimensional holographic reconstruction is disclosed. A controllable light modulator into which a three-dimensional scene is coded is illuminated by coherent light, a reconstruction means projects the modulated light close to an eye position into a space of observation and a control means controls the illumination. This provides a holographic reproduction device in which the speckle patterns occurring during reconstruction of a three-dimensional scene are reduced. Also provided is a next-to-real time method using a carrier medium of conventional image refresh rate. | 04-22-2010 |
20100097673 | HOLOGRAPHIC IMAGE DISPLAY SYSTEMS - This invention relates to methods and apparatus for the holographic display of images. We describe a method of compensating for spatial phase non-uniformities in a holographic image display system, the system including a substantially coherent light source illuminating an SLM ( | 04-22-2010 |
20100103485 | HOLOGRAPHIC DISPLAY DEVICE - A holographic display comprising light sources (L | 04-29-2010 |
20100103486 | Device for the Production of Holographic Reconstructions with Light Modulators - A device for the production of holographic reconstructions having light modulators is disclosed. The device comprises at least one pixelated light modulator illuminated by at least one light source, and a focusing optical element field arrangement which images the light sources in an image plane after the light modulator. For the reconstruction, only one order of diffraction of the Fourier spectrum of the hologram should be used. The light modulator is provided with an assigned filter-aperture field arrangement which is located in the area of the image plane of the light source images and which has a plurality of aperture openings. Said aperture openings are designed in such a way that they each allow the passage of a prespecified area of the overall dimensions either smaller or the same as a diffraction order of the diffraction spectrum following Fourier transformation and produced from the holographic coding of the light modulator. | 04-29-2010 |
20100118359 | Holographic Projection Display with Corrected Phase Coding - A holographic projection display for reconstructing a 3D-scene and a coding method that indicates an improvement of the control value of coding through an iterative Fourier transformations-algorithm are disclosed. The display includes a reproduction system including at least two reproducing means. First reproduction means for reproducing the illuminating means and for the Fourier transformation of actual wave fronts modulated in the phase modulator follow a second reproduction means, that functions as a screen. The plane of the screen is a Fourier transformation plane for calculations with the iterative Fourier transformation-algorithm and the plane of the phase modulator (6) is the other Fourier transformation plane. | 05-13-2010 |
20100118360 | Method and Device for Reconstructing a Three-Dimensional Scene with Corrected Visibility - A method is disclosed for reconstructing a 3D scene made of object points in a holographic display, wherein the reconstruction is visible from a visibility region. Visibility and/or covering of parts of the 3D scene corresponding to the real parameters is realized, with the reconstruction, for a viewer from every place of the visibility region. Processor means generate a spatial point matrix for defining the positions of individual object points, which are assigned predetermined intensity and phase values. Within the visibility region, a complex-value wave front for each single object point is calculated. The intensity values of the object points are multiplied with the associated visibility function, to determine a common modified wave front of the object points, transformed into the plane of a light modulator to calculate modified control values for the object points. | 05-13-2010 |
20100128334 | Holographic recording apparatus, holographic reproduction apparatus, information encoding method, recording method, and information reproduction - A holographic recording and reproduction apparatus ( | 05-27-2010 |
20100142016 | HOLOGRAPHIC IMAGE PROJECTION SYSTEMS - We describe a holographic image projection system for projecting an image at an acute angle onto a surface, the system including: a spatial light modulator (SLM) to display a hologram; an illumination system to illuminate said displayed hologram; projection optics to project light from said illuminated displayed hologram onto said surface at an acute angle form said image; and a processor having an input to receive input image data for display and an output to provide hologram data for said SLM, wherein said processor is configured to: input image data and convert this to target image data; generate from said target image data hologram data for display as a hologram on the SLM to reproduce a target image; and wherein said target image is distorted to compensate for said projection of said hologram at an acute angle to form said image. | 06-10-2010 |
20100149609 | Method for Generating Video Holograms in Real-Time for Enhancing a 3D-Rendering Graphic Pipeline - A method for generating video holograms is disclosed, principally for a holographic reproduction device, having at least one light modulator in which a scene which is deconstructed into object points is encoded as a complete hologram and can be viewed as a reconstruction from a visibility region. A 3D-rendering graphic pipeline determines color and depth information for the object points of the scene, from which a holographic pipeline determines the complex hologram values. | 06-17-2010 |
20100165428 | Device for Minimizing Diffraction-Related Dispersion in Spatial Light Modulators - A device for minimizing diffraction-related dispersion in spatial light modulators for holographically reconstructing colored representations is disclosed, and comprises a spatial light modulator designed as a diffractive optical element and provided with controllable structures, and at least one light source illuminating the spatial light modulator. Wavelength-dependent visible ranges associated with a predefined higher order of diffraction have a lateral chromatic offset relative to the position of the extensions of said visible ranges at a defined viewer's level, said lateral chromatic offset being in relation to the normal line to the surface of the spatial light modulator. The quality of reconstruction is improved regardless of the direction of incidence and emergence of the light. | 07-01-2010 |
20100165429 | OPTICAL SYSTEMS - A holographic head up display (HUD) for a vehicle to display an image holographically on a curved display surface such as a windshield is disclosed. The HUD can include a spatial light modulator (SLM) to display a hologram, an illumination system to illuminate said displayed hologram, projection optics to project light from said hologram onto said display surface to form said image, and a processor configured to process said image data to generate hologram data for display on the SLM to form said image. The HUD can further include a non-volatile data memory coupled to said processor to store wavefront correction data for said display surface, and the processor can be configured to apply a wavefront correction responsive to said stored wavefront correction data when generating the hologram data to correct the image for aberration due to a shape of said display surface. | 07-01-2010 |
20100165430 | Holographic Reconstruction System and Method with an Enlarged Visibility Region - A holographic reconstruction system and a corresponding holographic reconstruction method are disclosed. The holographic reconstruction system comprises light source means for providing substantially coherent light, reconstruction means for holographically reconstructing a scene and for producing a visibility region from where the viewer can view the holographically reconstructed scene, and deflection means for positioning the visibility region. The aim of the invention is to improve the visibility region of a holographic reconstruction system. To achieve this aim, the holographic reconstruction system comprises deflection drive means for continuously rotating or pivoting the deflection means about a rotational axis at a rotary frequency, thereby displacing the visibility region. The invention allows one or more viewers to view the scene reconstructed by means of the holographic reconstruction system from different positions while facilitating the implementation of the holographic reconstruction system with conventional means. | 07-01-2010 |
20100172001 | DISPLAYING AN IMAGE - A target image | 07-08-2010 |
20100188718 | Method and Apparatus for Generating Reconstructions of Information Encoded in Ambient Light Modulators - The present invention relates to a method and device for the generation of reconstructions of information encoded on spatial light modulators by way of illumination with coherent incident waves. The invention includes the following steps: Splitting of the incident wave into at least two incident sub-waves, Modulation of the incident sub-waves with the help of selected apodisation functions so to form modulated incident sub-waves, Direction of the modulated incident sub-waves towards the corresponding, spatially separated and pixel-matrix-shifted spatial light modulators, Diffraction of the modulated incident sub-waves at the encoded pixels of the respective spatial light modulators, Additive combination of the sub-waves emitted by the respective spatial light modulators to form one common emitted wave, and Transformation of the emitted wave into the Fourier plane with the help of a projection system. | 07-29-2010 |
20100188719 | Holographic Reconstruction Device - A holographic reconstruction device is designed such that visible resolution of the reconstruction of a scene is matched to the resolution capability of the human eye, to the imaging properties of the reconstruction means used or to the resolution capability of the light modulation means used. A grid scale for the object points is generated by system control means in each case in a plane of intersection, which grid scale cannot be used to separately resolve adjacent object points in the plane of intersection, and the compilation of object points of the respective plane of intersection to form an object point group with adjacent object points which can be separately resolved is carried out. In holographic displays, the invention is used to reduce speckle patterns and reduce the number of the holograms of object points of the scene, which are to be calculated and coded, and the calculation complexity. | 07-29-2010 |
20100208315 | COMPUTER GENERATED HOLOGRAM, GENERATION METHOD, AND EXPOSURE APPARATUS - The present invention provides a computer generated hologram which forms a light intensity distribution on a predetermined plane by giving a phase distribution to a wavefront of incident light, the hologram comprising a plurality of anisotropic cells each including an anisotropic medium configured to change a polarization state of the incident light, and a plurality of isotropic cells each including an isotropic medium configured not to change a polarization state of the incident light, wherein a linearly polarized light component, in a first direction, of the incident light forms a first light intensity distribution on the predetermined plane, and a linearly polarized light component, in a second direction perpendicular to the first direction, of the incident light forms a second light intensity distribution different from the first light intensity distribution on the predetermined plane. | 08-19-2010 |
20100214634 | Holographic Reconstruction System with an Optical Wave Tracking Means - A holographic reconstruction system is disclosed with spatial light modulation means, modulating interferable light waves from light sources with at least one video hologram, comprising optical focusing means, focusing the modulated light waves with the reconstructed object light points for at least one eye position for the eyes of observers and controllable electro-optical deflector means, which direct the focused modulated light waves with the reconstructed light points to at least one eye position in order to reduce the aberrations. The reconstruction system has the optical focusing means in a field of focusing elements, wherein each focusing element is provided with at least one interferable light source. The electro-optical deflector means lie in the light path of the interferable light waves after the optical focusing mean and have at least one field of deflector elements, which has at least one separately controllable electro-optical deflector element for each focusing element. | 08-26-2010 |
20100220372 | COMPUTER GENERATED HOLOGRAM AND EXPOSURE APPARATUS - The present invention provides a computer generated hologram which forms a light intensity distribution on a predetermined plane by giving a phase distribution to a wavefront of incident light, the hologram comprising a first anisotropic cell and second anisotropic cell configured to change a polarization state of the incident light, and a first isotropic cell and second isotropic cell configured not to change the polarization state of the incident light, wherein a direction of an optic axis of the first anisotropic cell is different from a direction of an optic axis of the second anisotropic cell, and a thickness of the first isotropic cell is different from a thickness of the second isotropic cell. | 09-02-2010 |
20100231999 | Dynamic Wavefront Shaping Unit - An optical unit for dynamically shaping a wavefront is disclosed, having light modulation cells disposed regularly in cell fields, and locally influencing partial light waves in a propagating light wavefront. Each cell field is connected to a cell controller separately adjusting the optical behavior of the light modulator cells. Serially-disposed fields, each having modulator cells, are located in the light path of the light wavefront. Cell control means adjust the modulator cells in a first cell field such that the modulator cells discretely implement a phase shift having a continuous phase value, and in a second cell field such that the modulator cells implement a prism function having a continuous directional value for the partial light waves. A focusing means for the emitted wavefront is also located in the light path of the optical unit, guiding the partial light waves at an output pupil of the optical unit. | 09-16-2010 |
20100232000 | Spatial Light Modulator Using Electrowetting Cells - A spatial light modulator for modulating light field amplitude comprises a surface relief grating adapted to act as a diffractive lens, where a material is used to fill at least one groove of a surface grating structure, such that a controllable refractive index birefringence of the material inside the surface relief grating is controlled by an electric field, which leads to a controllable intensity at a fixed focal point. | 09-16-2010 |
20100238527 | HOLOGRAPHIC DISLPAY USING LIQUID CRYSTAL DISPLAY DEVICE OPERATING WITH UNPOLORIZED LIGHT - An electroholographic display system ( | 09-23-2010 |
20100238528 | METHOD AND SYSTEM FOR ELECTROHOLOGRAPHIC DISPLAY WITH ZEROTH-ORDER DIFFRACTION SUPPRESSION - An electroholographic display system ( | 09-23-2010 |
20100265552 | Dynamically reconfigurable negative index material crossbars with gain - Various embodiments of the present invention are directed to negative index material crossbars that can be electronically controlled and dynamically reconfigured to exhibit a variety of electromagnetic properties. In one aspect, a negative index material crossbar comprises a first layer of non-crossing nanowires, and a second layer of approximately parallel nanowires that overlay the nanowires in the first layer. Resonant elements at nanowire intersections, and a gain material incorporated in the crossbar such that transmitted electromagnetic radiation with wavelengths in a wavelength band of interest is enhanced when the crossbar is flood pumped with pump electromagnetic radiation. | 10-21-2010 |
20100271675 | METHOD FOR ENCODING A COMPUTER-GENERATED HOLOGRAM - The object of the invention is to improve the quality of encoding a CGH of a three-dimensional object on a light modulator with the help of an iterative method with phase encoding and thus to improve the reconstruction quality. Based on given object data sets, a two-dimensional distribution of N complex values of a wave field in a virtual observer window ( | 10-28-2010 |
20100271676 | Projection Device for the Holographic Reconstruction of Scenes - The present invention relates to a projection device for holographic reconstruction of scenes, said device comprising at least one light modulator device and at least one light source which emits sufficiently coherent light for the generation of a wave front of a scene, which is encoded in the light modulator device. A Fourier transform (FT) of the light which is emitted by the light source and modulated by the light modulator device is projected by a projection means on to a screen. Further, the wave front which is encoded on the light modulator device is projected by the projection means into at least one virtual observer window in an observer plane. For tracking the observer window according to a change in an eye position of the at least one observer, the inventive device comprises at least one deflection means, which is disposed between the light modulator device and the screen. | 10-28-2010 |
20100271677 | IMAGE TRANSFER APPARATUS - An apparatus includes a light source configured to provide a path of light and a spatial light modulator located in the path of light and configured to modulate the light source. Relay optics are configured to receive the modulated light from the spatial light modulator and to project a computer generated image to a nominal image plane. The light source is configured to illuminate the spatial light modulator with collimated light. | 10-28-2010 |
20100271678 | COMPUTER GENERATED HOLOGRAM - A three dimensional display apparatus includes a diffraction panel for displaying a computer generated hologram and a look-up table. The look-up table includes a plurality of phase entries corresponding to a plurality of image points within a three dimensional image replay volume of the computer generated hologram. The apparatus further includes one or more processors configured to notionally divide the computer generated hologram into one or more hogels and to calculate diffraction fringe information for at least one of the hogels based on a selection of the phase entries. | 10-28-2010 |
20100277779 | Light Modulating Device - The present invention relates to a light modulating device, comprising a SLM and a pixelated optical element, in which a group of at least two adjacent pixels of the SLM in combination with a corresponding group of pixels in the pixelated optical element form a macropixel, the pixelated optical element being of a type such that its pixels comprise a fixed content, each macropixel being used to represent a numerical value which is manifested physically by the states of the pixels of the SLM and the content of the pixels of the pixelated optical element which form the macropixel. | 11-04-2010 |
20100296142 | Apparatus and Method to Align the Elements of a Holographic Information Data Storage System - A method to align the write channel portion of a holographic data storage system. The method establishes a write threshold correlation factor, provides a reference beam, and illuminates a holographic data storage medium encoded with a write reference orientation image with the reference beam to generate a write channel alignment data beam including a projected write reference orientation image. The method projects the write channel alignment data beam onto an optical detector, and calculates a first write correlation factor using the projected write reference orientation image, a stored write reference orientation image, and the tangential matched filter. If the method determines that the first write correlation factor is greater than or equal to the write threshold correlation factor, then the method determines that the spatial write channel is properly aligned. | 11-25-2010 |
20100309534 | METHOD OF DIGITALLY PROCESSING OPTICAL WAVES IN INTEGRATED PLANAR OPTICAL DEVICES THAT OPERATE ON THE PRINCIPLE OF DIGITAL PLANAR HOLOGRAPHY - A method of digitally processing light waves passing through a planar structure having given functions f | 12-09-2010 |
20100328742 | HOLOGRAM, HOLOGRAM DATA GENERATION METHOD, AND EXPOSURE APPARATUS - The present invention provides a hologram which forms a light intensity distribution on a predetermined plane by using an incident light. The hologram includes a plurality of cells configured to control both a phase of a first polarized light component of the incident light and a phase of a second polarized light component. The plurality of cells are designed to form a portion in an overlap region in which a first light intensity distribution region formed on the predetermined plane by the first polarized light component and a second light intensity distribution region formed on the predetermined plane by the second polarized light component are superposed on each other. The phase of the first polarized light component is diffused in the portion formed in the overlap region. | 12-30-2010 |
20110002019 | HOLOGRAPHIC IMAGE DISPLAY SYSTEMS - The invention relates to techniques for speckle reduction in holographic optical systems, in particular holographic image display systems. We describe a holographic image display system for displaying an image holographically on a display surface, the system including: a spatial light modulator (SLM) to display a hologram; a light source to illuminate said displayed hologram; projection optics to project light from said illuminated displayed hologram onto said display surface to form a holographically generated two-dimensional image, said projection optics being configured to form, at an intermediate image surface, an intermediate two-dimensional image corresponding to said holographically generated image; a diffuser located at said intermediate image surface; and an actuator mechanically coupled to said diffuser to, in operation, move said diffuser to randomise phases over pixels of said intermediate image to reduce speckle in an image displayed by the system. | 01-06-2011 |
20110013244 | Controllable Deflection Device - A visibility region produced through superimposed light bundles is tracked within a large angular range in front of a light modulator through controllable electrowetting cells having a prism function. Negative effects of buckling of the light bundle cross section are minimized by deflecting the light bundle in the prism cell. Light bundles, modulated by a controllable light modulator, impinge the modulator cells with a defined intensity distribution and pass by a controllable deflection device including a prism cell and a controllable electrode arrangement that adjusts boundary surfaces between a plurality of non-mixable materials. The altered intensity distribution is compensated in the light path of the light bundle in the visibility region by reducing the intensities of secondary diffraction order maxima such that the effective surface of a modulator cell has a shape that is tailored to the altered intensity distribution. | 01-20-2011 |
20110019249 | METHOD FOR ENCODING COMPUTER-GENERATED HOLOGRAMS IN PIXELATED LIGHT MODULATORS - The invention relates to a method for encoding computer-generated holograms in pixelated light modulators, the encoding area of which comprises a pixel matrix whose pixels are provided with a pixel form and a pixel transparency, wherein the encoding area contains a hologram made up of sub-holograms, to each of which is assigned an object point of the object to be reconstructed by the hologram. The corruption of the reconstruction of the hologram caused by the real pixel form and the pixel transparency is largely eliminated and the computing time for correction of the hologram is reduced. Each individual computer-generated sub-hologram is multiplied by a correction function, and only thereafter the corrected sub-holograms are added up to form a total hologram, the correction function being based on the reciprocal of the transform of the pixel function (e.g. 1/sinc) associated with the virtual observer window. | 01-27-2011 |
20110026089 | VIDEO HOLOGRAM AND DEVICE FOR RECONSTRUCTING VIDEO HOLOGRAMS - The invention relates to video holograms and devices for reconstructing video holograms, comprising an optical system having a light source, lens and the video hologram having cells arranged in a matrix or a regular pattern with at least one opening per cell, the phase or amplitude of said opening being controllable. The holographic video representations of expanded spatial objects can be achieved in a wide viewing area in real time using controllable displays, whereby the objects are either computer-generated or created by different means. The space-bandwidth product (SBP) of the hologram is thus reduced to a minimum and the periodicity interval of the Fourier spectrum is used as a viewing window on the inverse transformation plane, through which the object is visible in the preceding space. The mobility of the viewer(s) is achieved by tracking the viewing window. | 02-03-2011 |
20110032586 | LIGHT MICROSCOPE WITH NOVEL DIGITAL METHOD TO ACHIEVE SUPER-RESOLUTION - Disclosed are methods and apparatus for reconstructing a wave, including interpolation and extrapolation of the phase and amplitude distributions, with application to imaging apparatus, such as microscopes. | 02-10-2011 |
20110058239 | METHOD OF PRODUCING A MICROSTRUCTURED PRODUCT - The present invention provides a method of producing a two-sided microstructured product and a registration structure that can be used for the method. The method comprises the steps of: ( | 03-10-2011 |
20110063700 | SYSTEM, METHOD, AND DEVICE FOR PRODUCING, TRANSMITTING AND DISPLAYING IMAGES IN HOLOGRAPHIC FORM OF UP TO THREE DIMENSIONS - A system, method, and device for producing, transmitting and displaying images in holographic form of up to three dimensions. Information representative of a three dimensional image can be converted into three-dimensional positional data. The three-dimensional position data can be converted into an electromagnetic field which can be received by nanomachines configured to adjust position in accordance with the electromagnetic field and including mirrored endpoints for reflecting light. The nanomachines can adjust position in three dimensions so that the mirrored endpoints reflect light in a manner that reproduces the three dimensional image in holographic form. | 03-17-2011 |
20110096381 | HOLOGRAPHIC DIRECT VIEW DISPLAY HAVING AN APOLIZATION DEVICE - The invention relates to apodization in a holographic direct view display. Known apodization functions are utilized/modified for an apodization mask such that the functions reduce the intensities of selected higher magnitudes of diffractions. The holographic direct view display comprises a controllable light modulator having modulator cells and modulating impinging coherent light into a phase and/or amplitude, and an array of apodization masks. The apodization masks have the same apodization function for a predetermined group of modulator cells, by means of which function a complex amplitude transparency can be set for the modulator cells. This transparency corresponds to an individually predefined course of intensity in a far field of the light modulator, wherein the predefined course of intensity includes a reducing of the light intensity of higher magnitudes of diffractions, and/or of the interfering light emitted by the light modulator. | 04-28-2011 |
20110109948 | HOLOGRAPHIC IMAGE DISPLAY SYSTEMS - This invention relates to methods, apparatus, and computer program code for the holographic display of images. We describe a method of displaying an image holographically. The method includes displaying a hologram on pixels of a spatial light modulator (SLM) and illuminating the SLM such that the image is displayed in pixels of a replay field (RPF) of the hologram. The method further includes subdividing the replay field into a plurality of spatially interlaced regions, and displaying holograms for each of the interlaced regions of the replay field sequentially at different times such that in an observer's eye the interlaced regions integrate to give the impression of the image and such that interference between adjacent pixels of the replay field is reduced. | 05-12-2011 |
20110122467 | LIGHT MODULATING DEVICE - A light modulating device comprises a spatial light modulator and a homogenizing element. A group of at least two adjacent pixels of the spatial light modulator form a macropixel: The spatial light modulator is of a type such that its pixels comprise a variable content. Each macropixel is used to represent a numerical value which is manifested physically by the states of the pixels of the spatial light modulator which form the macropixel. For each macropixel a homogenizing element is present in the optical path after the macropixel. The homogenizing element comprises an optical input and an optical output. The homogenizing element is adapted such that output light of the macropixel is entering the optical input of the homogenizing element and is mixed within the homogenizing element and is output at the optical output of the homogenizing element. | 05-26-2011 |
20110149359 | ILLUMINATION DEVICE WITH A FILTERING DEVICE - An illumination device having a filtering device is configured such that the filtering device comprises an optically addressable spatial light modulator with a filtering aperture which is generated by addressing. The position of the filtering aperture within the Fourier plane and/or the size of the filtering aperture is controlled by the control unit. The light modulator is addressed such that the position of the filtering aperture in the Fourier plane corresponds with the position of the intermediate image of the activated light source. At the same time the position of the imaged intermediate image corresponds with the detected position in the observer plane, and the size of the filtering aperture is determined by maximal one diffraction order of the light which is diffracted by the electrically addressable spatial light modulator. The field of application of this invention includes holographic projection displays. | 06-23-2011 |
20110157667 | Holographic Image Display Systems - The invention relates to holographic head-up displays, to holographic optical sights, and also to 3D holographic image displays. We describe a holographic head-up display and a holographic optical sight, for displaying, in an eye box of the display/sight, a virtual image comprising one or more substantially two-dimensional images, the head-up display comprising: a laser light source; a spatial light modulator (SLM) to display a hologram of the two-dimensional images; illumination optics in an optical path between said laser light source and said SLM to illuminate said SLM; and imaging optics to image a plane of said SLM comprising said hologram into an SLM image plane in said eye box such that the lens of the eye of an observer of said head-up display performs a space-frequency transform of said hologram on said SLM to generate an image within said observer's eye corresponding to the two-dimensional images. | 06-30-2011 |
20110170153 | COMPUTER-GENERATED HOLOGRAM FOR RECONSTRUCTING A FULL-COLOR IMAGE WITH HIGH RESOLUTION AND ITS FABRICATION METHOD - A computer-generated hologram that is capable of reconstructing a full-color image and achieving a high resolution is provided. A recording plane of the hologram is divided by a multiplicity of parallel sections in the horizontal direction to define a multiplicity of areas. Amplitude information and phase information corresponding to different wavelengths which vary periodically in a direction traversing the multiplicity of areas, is recorded in the recording medium. Information about the same portion of the original image is recorded in individual points belonging to the same area, and information about another corresponding portion of the original image is recorded in individual points belonging to another area. | 07-14-2011 |
20110176190 | SPECKLE-NOISE REDUCTION IN HOLOGRAPHIC PROJECTIONS - A method for reconstructing a holographic projection comprising providing a single hologram, providing at least one cyclic shift of at least a portion of the single hologram in the space domain, and reconstructing a cyclically shifted hologram by applying said cyclic shift on said portion. | 07-21-2011 |
20110228365 | COMPUTER IMPLEMENTED METHOD FOR GENERATING BINARY HOLOGRAMS - A numerical method of recording a two or three dimensional object scene in a binary hologram. When the binary hologram is illuminated with a reference beam, the original object scene can be reconstructed and observed by a viewer. As the hologram is binary, i.e. composed of black or white pixels, it can be printed with commodity printers. The process is simple, fast, and economical, hence decreasing the cost and time for hologram design and production. In addition, with binary holograms, the ability to store the holograms is enhanced and binary holograms facilitate efficient transmission of the holograms. | 09-22-2011 |
20110267663 | HOLOGRAPHIC IMAGE PROJECTION METHOD AND HOLOGRAPHIC IMAGE PROJECTION SYSTEM - Provided is a hologram-image projection method including a step of setting three-dimensional position information in a specimen for a plurality of focal points where laser light is to be focused via an objective lens; a step of performing reverse ray tracing from the individual focal points to an entrance pupil position of the objective lens by using the position information set for the individual focal points in the specimen, a refractive index of the specimen, and overall characteristic data of the objective lens, to calculate a wavefront of the laser light at the entrance pupil position from the individual focal points; a step of calculating a combined wavefront by combining the plurality of calculated wavefronts; a step of setting a phase pattern to be applied to a wavefront modulating device on the basis of the calculated combined wavefront; and a step of applying the set phase pattern to the wavefront modulating device, causing the laser light to be incident thereon, and focusing the laser light whose wavefront is modulated by the phase pattern on the specimen via the objective lens. | 11-03-2011 |
20110267664 | METHOD FOR PREPARING A HOLOGRAM RECORDING MEDIUM - Two original images to be recorded are prepared as data (S | 11-03-2011 |
20110267665 | APPARATUS AND METHOD FOR RECORDING FRESNEL HOLOGRAMS - An apparatus for producing a hologram of an object includes a light source that emits an incoherent electromagnetic wave toward the object, and a masking device configured to display a mask, receive the incoherent electromagnetic wave emitted toward the object, mask the received incoherent electromagnetic wave according to the displayed mask, and produce a masked electromagnetic wave. The apparatus also includes an image recording device configured to capture an image of the masked electromagnetic wave, and a processing device configured to convert the image of the masked electromagnetic wave into the hologram of the object. A method for producing a hologram of an object is also described. | 11-03-2011 |
20110304895 | METHOD OF COMPUTING A HOLOGRAM FOR RECONSTRUCTING AN OBJECT USING A DISPLAY DEVICE - A method of computing a hologram for reconstructing an object using a display device is provided. The display device enables a holographic reconstruction of the object. The display device comprises a light source and an optical system to illuminate a hologram-bearing medium being encodable with the hologram. The method comprises the steps of: (a) computing the hologram by determining the wavefronts at an approximate observer eye position that would be generated by a real version of the object to be reconstructed; and (b) encoding the computed hologram in the hologram-bearing medium. | 12-15-2011 |
20110310447 | METHOD FOR GENERATING 3D VIDEO COMPUTER GENERATED HOLOGRAM USING LOOK-UP TABLE AND SPATIAL REDUNDANCY, AND APPARATUS THEREOF - A method of computing a computer generated hologram (CGH) using a look-up table and spatial redundancy and an apparatus thereof are disclosed. The method in accordance with an embodiment of the present invention can includes computing one principal fringe pattern for each point of a target object that is separated by a same distance from a reference point of a hologram plane, storing the principal fringe pattern in accordance with a distance between each point of the target object and the reference point, computing identity data representing whether each point of an input image and adjacent points are identical to one another, computing an n-point fringe pattern by combining n principal fringe patterns and computing hologram information by matching the n-point fringe pattern to n successive points identified from the identity data. Here, the n is a natural number. | 12-22-2011 |
20110310448 | METHOD FOR CALCULATING COMPUTER GENERATED HOLOGRAM USING LOOK-UP TABLE AND APPARATUS THEREOF - A method of calculating a computer generated hologram (CGH) using a look-up table and an apparatus thereof are disclosed. The method in accordance with an embodiment of the present invention can include calculating one principal fringe pattern for points of a target object that are separated by a same distance from a reference point of a hologram plane, writing the principal fringe pattern in the look-up table in accordance with a distance between the points of the target object and the reference point, calculating computer-generated hologram information by shifting the principal fringe pattern to the points of the target object located on a same plane, and playing back a three-dimensional image by using the computer-generated hologram information. | 12-22-2011 |
20110310449 | METHOD FOR GENERATING 3D VIDEO COMPUTER-GENERATED HOLOGRAM USING LOOK-UP TABLE AND TEMPORAL REDUNDANCY AND APPARATUS THEREOF - A method of computing CGH using look-up table and temporal redundancy and an apparatus thereof are disclosed. The apparatus includes an extracting unit, which extracts a brightness image and a depth image from a target frame of 3D video, a comparing unit, which extracts a change point that is different from a point of the target frame after comparing the brightness image and the depth image of the target frame to a brightness image and a depth image of a previous frame, a hologram computing unit, which computes hologram information by differentiating hologram computing methods using hologram patterns depending on whether a ratio between the number of the change points and the number of the entire frame points is equal to or greater than a predetermined critical value, and a storing unit, which stores the brightness image and the depth image of the target image and the hologram information. | 12-22-2011 |
20120002256 | Laser Based Image Display System - We describe optical techniques for replicating an image to expand the exit pupil of a head-up laser-based image display system. The system includes image replication optics to replicate an image carried by a substantially collimated beam, the image replication optics comprising a pair of substantially planar reflecting optical surfaces defining substantially parallel planes spaced apart in a direction perpendicular to the parallel planes. The system is configured to launch the collimated beam into a region between the parallel planes such that the reflecting optical surfaces waveguide the beam between the surfaces in a plurality of successive reflections at front and rear optical surfaces. The front optical surface is configured to transmit a proportion of the collimated beam when reflecting the beam such that at each reflection of the collimated beam at the front optical surface a replica of the image is output from the image replication optics. | 01-05-2012 |
20120008181 | Holographic Image Display Systems - We describe a method of determining an aberration correction for a holographic image display system using a spatial light modulator (SLM) to display a hologram. Embodiments of the invention measure the corrections needed for a particular projection system, using the same system SLM as used to generate the images to provide wavefront-sensing holograms. The projector's projection optics are used to provide the wavefront sensor and there is no need for lenslets. Embodiments of the invention use a plurality of successive holograms directing light from differently-located patches on the hologram into the image. | 01-12-2012 |
20120019882 | COMPUTATIONAL HIGHLIGHT HOLOGRAPHY - A technique for fabricating a highlight hologram based on a digital object performs point sampling on the object and represents each sampled point as a geometric patch. A set of geometric patches corresponding to sampled points from the object are fabricated into a substrate. A paraboloid patch may be used for reflective substrates while a hyperboloid may be used for transmissive substrates. To avoid specifying overlapping patches, which are impractical to fabricate, certain of the sample points may be merged. An output set of grooves is saved and may be used to specify fabrication of a highlight hologram on the physical substrate. | 01-26-2012 |
20120044551 | OPTICAL ELEMENT AND METHOD FOR MANUFACTURING THE SAME - Hologram recording medium is manufactured by using computer. On a recording plane | 02-23-2012 |
20120057213 | Volumetric Imaging of a Holographic Optical Traps - A method and system for manipulating object using a three dimensional optical trap configuration. By use of selected hologram on optical strap can be configured as a preselected three dimensional configuration for a variety of complex uses. The system can include various optical train components, such as partially transmissive mirrors and Keplerian telescope components to provide advantageously three dimensional optical traps. | 03-08-2012 |
20120069412 | HOLOGRAPHIC IMAGING SYSTEMS - A holographic imaging system includes an electrical addressable spatial light modulator (EASLM) and an optically addressable spatial light modulator (OASLM). A read light is configured to illuminate the OASLM, and a controller is configured to address the EASLM with both positive and negative sub-images and transmit the positive and negative sub-images to the OASLM. The controller is further configured to address the OASLM with an operating voltage, wherein the read light generates a holographic image comprised of diffraction patterns from the positive and negative sub-images. | 03-22-2012 |
20120086994 | APPARATUS AND METHOD FOR HOLOGRAPHY 3-DIMENSIONAL DISPLAY - An apparatus includes a recording light source configured to emit recording beams, an electrically addressable spatial light modulator (EASLM) configured to time sequentially modulate the recording beams emitted from the recording light source according to hologram information corresponding to a 3-dimensional image spatially divided into a plurality of portions, an optically addressable spatial light modulator (OASLM) configured to include a plurality of regions corresponding to the plurality of the divided portions of the 3-dimensional image and images on a region corresponding to the portions using the modulated recording beams to form a hologram, a scanning optical unit configured to reproduce the hologram formed by the recording beams serially modulated by the EASLM on a reduced scale and transmit the hologram to the regions of the OASLM corresponding to the portions, and a reproducing light source configured to produce a surface light and emit the surface light to the OASLM. | 04-12-2012 |
20120086995 | LIGHT MICROSCOPE WITH NOVEL DIGITAL METHOD TO ACHIEVE SUPER-RESOLUTION - Methods and apparatus for reconstructing a wave, including interpolation and extrapolation of the phase and amplitude distributions, with application to imaging apparatus, such as microscopes. | 04-12-2012 |
20120105929 | Apparatus and method for displaying holographic image using collimated directional blacklight unit - A holographic three-dimensional (3D) image generating apparatus that may use a collimated directional blacklight unit (CD BLU) is provided. The CD BLU may output a collimated light of which an emitting light is adjusted. The convergent lens may enable the outputted collimated light to converge into a viewing area of a viewer and thus, a viewing window may be generated. A spatial light modulator (SLM) may perform spatially-varying modulation with respect to the collimated light converging into the viewing area to generate a focused beam. | 05-03-2012 |
20120120466 | WAVELENGTH-TUNABLE LASER SYSTEM - A wavelength-tunable laser system includes an optical fiber collimator array having at least two ports, an optical amplifier connected to one port of an optical fiber, an optical coupler for coupling light incident from the optical amplifier and transmitting the coupled light to another port, a diffraction grating plate for guiding each wavelength component of light incident from the optical fiber collimator array in a different direction, and an Opto-Very Large Scale Integration (Opto-VLSI) processor. | 05-17-2012 |
20120127549 | WAVELENGTH CONVERSION LASER SYSTEM - The present invention relates to a wavelength conversion laser system and provides a wavelength conversion laser system including a semiconductor optical amplifier, an optical condenser that condenses light emitted from the optical amplifier, a diffraction grating plate that induces wavelength components of the light having passed through the optical condenser in different directions, and an optical very large scale integration (VLSI) processor. | 05-24-2012 |
20120140299 | HOLOGRAPHIC IMAGE DISPLAY SYSTEM - This invention relates to holographic image display systems, and to related methods and processor control code. We describe a method of displaying an image holographically, the method including: inputting display image data defining said image for display; processing said image data to determine first image data representing a first spatial frequency portion of said image data and second image data representing a second spatial frequency portion of said image data, wherein said second spatial frequency is higher than said first spatial frequency; displaying a hologram of said first image data on a spatial light modulator (SLM) to form a holographically-generated intermediate real image; modulating said intermediate real image using said second image data to display said image. | 06-07-2012 |
20120140300 | DISPLAY SYSTEMS INCORPORATING FOURIER OPTICS - A head up display signal processing system is disclosed. The system comprises an image projector for projecting an image onto a screen, the screen being partially reflective and partially transmissive. The system is operable to provide a separate optical element at a plurality of locations upon the screen, wherein each element comprises an optical phase representative of the location of the element upon the screen, such that the combination of optical elements is arranged to produce an optical hologram upon the screen. | 06-07-2012 |
20120154880 | OPTICAL MODULATORS - Various embodiments of the present invention are directed to external, electronically controllable modulators. In one embodiment, a modulating device ( | 06-21-2012 |
20120162732 | DEVICE AND METHOD FOR A HOLOGRAPHIC DISPLAY WITH ELECTROMECHANICAL ACTUATED MIRROR DISPLAY - The present disclosure provides systems, methods and apparatus for producing holographic displays using an electromechanical systems device. In one aspect, the method can be implemented to allow for simultaneous modulation of phase and amplitude of light in a display device composed of a plurality of pixels. A light source can provide sufficiently coherent light to a light guide, which can direct the light to a plurality of reflective members. The reflective members can reflect the light to a pinhole-lenslet array. The combination of the pinhole-lenslet array and the reflective members can act as a spatial light modulator, modulating the phase and amplitude of the light reflected by the reflective members. The lenslet can focus the light to a plane at the opening of the pinhole, wherein the light can exit the pinhole to be viewed in combination with light from additional pixels, and can be viewed as a holographic image. | 06-28-2012 |
20120162733 | METHOD FOR CONTROLLING DEPTH-OF-FOCUS IN 3D IMAGE RECONSTRUCTIONS, IN PARTICULAR FOR SYNTHESIZING THREE-DIMENSIONAL DYNAMIC SCENE FOR THREE-DIMENSIONAL HOLOGRAPHY DISPLAY, AND HOLOGRAPHIC APPARATUS UTILIZING SUCH A METHOD - The invention concerns a method for controlling depth-of-focus in 3D image reconstructions, in particular for:
| 06-28-2012 |
20120170088 | MEMS Spatial Light Modulator Driver Calibration Systems - We describe a method of compensating for long-term mechanical property changes in an analogue optical MEMS SLM. In embodiments the SLM comprises multiple piston-type actuation optical phase modulating pixels each having a mirror with a variable height determined by an analogue voltage applied to a corresponding pixel electrode. The method comprises performing initial calibrations of the analogue displacement and pixel capacitance versus analogue voltage to determine a relationship between the pixel capacitance and analogue displacement, and then updating the displacement-voltage capacitance using the initial calibration data and a later calibration of the analogue voltage-capacitance characteristic of a pixel. | 07-05-2012 |
20120170089 | MOBILE TERMINAL AND HOLOGRAM CONTROLLING METHOD THEREOF - Disclosed are a mobile terminal and a hologram controlling method thereof. Texts, moving images, contents, and so forth may be displayed as a hologram image, and the displayed hologram image may be variously controlled according to a user's touch. This may solve spatial limitations of a general mobile terminal, and may implement a holographic video call more effectively. | 07-05-2012 |
20120188619 | Three-dimensional holographIC display using active shutter - A three-dimensional holographic image display device and a method using the same are provided. Light corresponding to left and right eye holograms is emitted according to a time division method and divided into a first path and a second path. Active shutters operate substantially in synchronization with the emitted left and right eye holograms to provide images to a user's left and right eyes. | 07-26-2012 |
20120188620 | Laser image projection system applicable to the marking of objects and method for generating holograms - Laser image projection system applicable to the marking of objects and method for generating holograms may include a reflection spatial light modulator, laser beam irradiating means for irradiating laser light onto the reflection spatial light modulator at a certain incidence angle, controlling means connected to the reflection spatial light modulator, the controlling means controlling said reflection spatial light modulator to define a holographic diffraction pattern corresponding to the desired optical image intended to be irradiated onto the object, and focusing means for performing a Fourier transform of the phase-modulated laser light to transform it into the optical image and irradiate it focused onto said object, wherein said focusing means includes a Fresnel lens holographically defined onto the reflection spatial light modulator to thereby improve an efficiency in the use of the light energy irradiated by said irradiating means. | 07-26-2012 |
20120188621 | HOLOGRAPHIC RECONSTRUCTION SYSTEM HAVING AN ENLARGED VISIBILITY REGION - The invention relates to a holographic reconstruction system for the reconstruction of scenes having at least one video hologram modulated wave front, and an enlarged visibility region. The system utilizes two-dimensional coded light modulator cells of spatial light modulation means and optical focusing means, which realize a Fourier transformation of the modulated wave front in their focal plane. First optical deflection means deflect the parallel disposed partial light waves such that their Fourier transformations appear as cascading in the focal plane. A spatial frequency filter located on the focal plane, lets each of the same diffraction orders of all modulated partial light waves pass, and second optical deflection means arrange the wave front strips next to each other at the modulated wave front, which reconstructs the scene. | 07-26-2012 |
20120206780 | METHOD AND DEVICE FOR MANUFACTURING A HOLOGRAM RECORDING MEDIUM - A method and device for manufacturing a hologram recording medium. Arrangements are made to enable different original images to be reproduced upon observation from different positions and yet enable reproduced images of high resolution to be obtained. | 08-16-2012 |
20120224236 | SYSTEM, APPARATUS AND METHOD FOR EXTRACTING THREE-DIMENSIONAL INFORMATION OF AN OBJECT FROM RECEIVED ELECTROMAGNETIC RADIATION - An apparatus and method to produce a hologram of an object includes an electromagnetic radiation assembly configured to receive a received electromagnetic radiation, such as light, from the object. The electromagnetic radiation assembly is further configured to diffract the received electromagnetic radiation and transmit a diffracted electromagnetic radiation. An image capture assembly is configured to capture an image of the diffracted electromagnetic radiation and produce the hologram of the object from the captured image. | 09-06-2012 |
20120262768 | STACKING A VISIBLE IMAGE AND A SYNTHETIC HOLOGRAM - The invention relates to a synthetic hologram consisting of an array of encoding cells, including a pattern in which the cells are inverted and have a phase modified by an offset value relative to the rest of the hologram. | 10-18-2012 |
20120274999 | SYSTEM, METHOD, AND DEVICE FOR PRODUCING, TRANSMITTING AND DISPLAYING IMAGES IN HOLOGRAPHIC FORM OF UP TO THREE DIMENSIONS - A system, method, and device for producing, transmitting and displaying images in holographic form of up to three dimensions. Information representative of a three dimensional image can be converted into three-dimensional positional data. The three-dimensional position data can be converted into an electromagnetic field which can be received by nanomachines configured to adjust position in accordance with the electromagnetic field and including mirrored endpoints for reflecting light. The nanomachines can adjust position in three dimensions so that the mirrored endpoints reflect light in a manner that reproduces the three dimensional image in holographic form. | 11-01-2012 |
20120287490 | Displaying 3D Imaging Sensor Data on a Hogel Light Modulator - Methods and systems for displaying 3D imaging data, including providing 3D imaging sensor data, processing the 3D imaging sensor data, the processing being configured to modify the 3D imaging sensor data into a modified format suitable for a hogel light modulator, and providing the modified 3D imaging data to the hogel light modulator. | 11-15-2012 |
20120300273 | FLOATING VIRTUAL HOLOGRAM DISPLAY APPARATUS - A floating virtual hologram display apparatus, includes a scanning mechanism, a diffractive optical element and a reconstruction light source thereof, where the scanning mechanism is installed with a scanning mirror. After a light beam emitted from the reconstruction light source passes through the diffractive optical element is diffracted by the diffractive optical element onto the scanning mirror, and then reflected by the scanning mirror, a hologram beam spot will be displayed in front of the scanning mirror; a floating virtual hologram is displayed in front of the scanning mirror after a position of the hologram beam spot is scanned and altered by the scanning mirror. | 11-29-2012 |
20120300274 | FLOATING VIRTUAL HOLOGRAM DISPLAY APPARATUS - A floating virtual hologram display apparatus, includes a scanning mechanism, a diffractive optical element and a reconstruction light source thereof. After a light beam emitted from the reconstruction light source passes through the diffractive optical element (DOE), and is diffracted by the DOE, a hologram beam spot will be displayed in front of the diffractive optical element; a floating virtual hologram is displayed after a position of the hologram beam spot is scanned and altered by the scanning mechanism; the floating virtual hologram being allowed to display a variable virtual image by controlling the reconstruction light source to emit bright, dark and different color of light corresponding to an image through the image signal processing unit. | 11-29-2012 |
20120327490 | SYSTEM, METHOD AND APPARATUS FOR PHASE-CODED MULTI-PLANE MICROSCOPY - A volume holographic imaging system enables the projection of a two-dimensional (2D) slice of a four-dimensional (4D) object. The 4D source object is illuminated to emit or scatter an optical field. A holographic element having one or more recorded holograms receives and diffracts the optical field into a diffracted plane beam. A phase mask is encoded in one or more multiplexed holographic gratings of the holographic element using a spatial filter. A collector lens focuses the diffracted plane beam to a 2D slice of the 4D probing source object. The focused 2D slice is projected onto a 2D imaging plane. The holographic element may have multiple multiplexed holograms that are arranged to diffract light from a corresponding slice of the 4D probing source object to a non-overlapping region of the detector. | 12-27-2012 |
20130003152 | INTERFEROMETRY-BASED STRESS ANALYSIS - A method comprises illuminating a sample with a coherent source, generating a first interference image of the sample, inducing a phase shift in the coherent source, generating a second interference image of the sample, inducing a load on the sample, generating a third interference image of the sample, and generating a phase distribution based on the interference images. The first interference image represents surface stress in the sample, the second interference image includes carrier fringes based on the phase shift, the third interference image represents a change in the surface stress due to the load, and the phase distribution represents the change in the surface stress. | 01-03-2013 |
20130003153 | HOLOGRAM AND METHOD OF FORMING A HOLOGRAM - A hologram comprises a holographic layer comprising a photosensitive layer, holographic structures being formed in the holographic layer using a light source having at least a first wavelength, and a luminescent material, the luminescent material being configured to absorb the first wavelength, and to emit light having a second wavelength. | 01-03-2013 |
20130016409 | METHOD FOR PROVIDING DYNAMIC OPTICAL ILLUSTION IMAGESAANM Kurtz; Andrew F.AACI MacedonAAST NYAACO USAAGP Kurtz; Andrew F. Macedon NY USAANM Kane; Paul JamesAACI RochesterAAST NYAACO USAAGP Kane; Paul James Rochester NY US - A method for providing a printed optical illusion image having first and second illusion states, comprising: receiving a specification of an optical illusion image having one or more mutable portions; and printing the optical illusion image on a printing device using a plurality of colorants, wherein one or more of the colorants are appearance mutable colorants having spectral characteristics can be switched between a first colorant state and a second colorant state by application of an appropriate external stimulus. The printed optical illusion image can be switched between the first and second illusion states by applying the appropriate external stimulus to controllably switch the one or more appearance mutable colorants between their first and second colorant states, thereby switching the mutable portions of the printed optical illusion image between corresponding first and second appearance states. | 01-17-2013 |
20130070320 | Optical Processing - A modular routing node includes a single input port and a plurality of output ports. The modular routing node is arranged to produce a plurality of different deflections and uses small adjustments to compensate for wavelength differences and alignment tolerances in an optical system. An optical device is arranged to receive a multiplex of many optical signals at different wavelengths, to separate the optical signals into at least two groups, and to process at least one of the groups adaptively. | 03-21-2013 |
20130070321 | HOLOGRAPHIC PROJECTION DEVICE FOR THE ENLARGEMENT OF A VISIBILITLY REGION - A holographic projection apparatus and a method is disclosed for magnifying a virtual visibility region, for observing a reconstructed scene with at least one light modulation device and with at least one light source having sufficiently coherent light for generating a wavefront of a scene that is coded in the light modulation device. By means of imaging the wavefront into a viewer plane, it is possible to generate the virtual visibility region for observing the reconstructed scene. The virtual visibility region has at least two virtual viewer windows. In this case, the virtual viewer windows are dimensioned such that the reconstructed scene can always be observed without tracking of the viewer windows upon movement of a viewer in the viewer plane. | 03-21-2013 |
20130100510 | METHOD AND APPARATUS FOR FAST GENERATION HOLOGRAM - A method and apparatus for fast generation of a hologram image. The method may include generating a point hologram corresponding to each three-dimensional (3D) point using sub-sampling, generating a hologram pattern using the generated point hologram, and generating a 3D hologram by interpolating the generated hologram pattern. | 04-25-2013 |
20130100511 | DISPLAY DEVICE - A display device ( | 04-25-2013 |
20130107336 | METHOD AND APPARATUS FOR FAST GENERATION OF THREE-DIMENSIONAL (3D) HOLOGRAM | 05-02-2013 |
20130120813 | HOLOGRAPHY - An iterative algorithm for hologram design with multiple output image planes arranged in close proximity to create continuous patterns within an imaging volume is disclosed. These may then be used for photolithography on 3D surfaces, or for generation of holograms for use in consumer devices. | 05-16-2013 |
20130135702 | METHOD FOR INTEGRATING A SYNTHETIC HOLOGRAM IN A HALFTONE IMAGE - A method for integrating a synthetic hologram in an image of a scene, including: forming, from a first image of the scene, a first matrix including pixels of two shades according to the gray level of the corresponding pixel of the first image, and a second matrix, image of the gray level difference between the corresponding pixels of the first image and of the first matrix; forming a third matrix based on a second image; forming a fourth matrix having each pixel including a central area with a surface area determined by the corresponding element of the second matrix and off-centered in the pixel according to the corresponding pixel of the third matrix; and performing a lithography of an opaque layer at the surface of a plate according to the pattern defined by the fourth pixel matrix. | 05-30-2013 |
20130148179 | HOLOGRAPHIC DISPLAY - Disclosed are various embodiments of a holographic display device that may reproduce dynamic color holograms and holographic video. A holographic display device includes a processor, a memory, a display screen, and one or more monochromatic light sources. The memory stores a holographic interference pattern that encodes a three-dimensional scene. The display screen is configured by the processor to render the holographic interference pattern. The monochromatic light sources are configured to illuminate the display screen so as to reconstruct a wavefront reflected by the three-dimensional scene. | 06-13-2013 |
20130155476 | SYSTEM OF DISPLAYING DIGITAL HOLOGRAM BASED ON PROJECTION AND METHOD THEREOF - Disclosed are a system and a method for performing buoyance of a 3D hologram image on a hologram display screen in a projection mode. A system of displaying a digital hologram includes: a composite hologram unit configured to generate a hologram array by receiving hologram data of a fringe pattern and by compositing background image and a foreground image using the received fringe pattern; a hologram projection unit configured to project a hologram image through a wide-angle lens by applying a light to the hologram array; and a hologram display unit configured to perform space buoyance of the hologram image projected by the hologram projection unit on a 3D hologram display screen. The digital hologram content is managed in real time by using the present disclosure, and transmission of the digital hologram content to a remote place and site adaptive display of hologram image media may be achieved. | 06-20-2013 |
20130170004 | BEAM DIVERGENCE AND VARIOUS COLLIMATORS FOR HOLOGRAPHIC OR STEREOSCOPIC DISPLAYS - A holographic display with an illumination device, an enlarging unit and a light modulator. The illumination device includes at least one light source and a light collimation unit, the light collimation unit collimates the light of the at least one light source and generates a light wave field of the light that is emitted by the light source with a specifiable angular spectrum of plane waves, the enlarging unit is disposed downstream of the light collimation unit, seen in the direction of light propagation, where the enlarging unit comprises includes a transmissive volume hologram realising an anamorphic broadening of the light wave field due to a transmissive interaction of the light wave field with the volume hologram, and the light modulator is disposed upstream or downstream of the anamorphic enlarging unit, seen in the direction of light propagation. | 07-04-2013 |
20130188231 | APPARATUS AND METHOD OF GENERATING HOLOGRAM BASED ON PATTERN REUSE - An apparatus and method of generating a hologram based on pattern reuse may include a pattern generating unit to generate an initial hologram pattern corresponding to a three-dimensional (3D) object in a 3D space, and a pattern transformation unit to determine a transformation hologram pattern by transforming the generated initial hologram pattern. | 07-25-2013 |
20130188232 | SYSTEM, APPARATUS AND METHOD FOR EXTRACTING IMAGE CROSS-SECTIONS OF AN OBJECT FROM RECEIVED ELECTROMAGNETIC RADIATION - An apparatus and method to produce a hologram of a cross-section of an object includes an electromagnetic radiation assembly configured to receive a received electromagnetic radiation, such as light, from the object. The electromagnetic radiation assembly is further configured to diffract the received electromagnetic radiation and transmit a diffracted electromagnetic radiation. An image capture assembly is configured to capture an image of the diffracted electromagnetic radiation and produce the hologram of the cross-section of the object from the captured image. The hologram of the cross-section includes information regarding a single cross-section of the object. | 07-25-2013 |
20130194644 | IMAGE DISPLAY SYSTEMS - We describe a holographic image projector, comprising: a laser light source to provide light at a laser wavelength; a first spatial light modulator (SLM) to display a hologram, wherein said first SLM is illuminated by said laser light source; intermediate image optics to provide a first intermediate real image plane at which a real image produced by said hologram displayed on said first SLM is formed; a wavelength-conversion material located at said first intermediate real image plane to convert said laser wavelength to at least a first output wavelength different to said laser wavelength; and second optics to project light from said real image at said output wavelength to provide a displayed image. | 08-01-2013 |
20130215483 | PLASMONIC MODULATOR AND OPTICAL APPARATUS INCLUDING THE SAME - A plasmonic modulator and an optical apparatus including the same are provided. The plasmonic modulator includes a first metal layer, and a second metal layer facing the first metal layer. The plasmonic modulator further includes a refractive index varying layer disposed between the first and second metal layers and including a varying refractive index, and an insulating nitride layer disposed between the refractive index varying layer and the first metal layer. | 08-22-2013 |
20130222873 | HOLOGRAPHIC DISPLAY DEVICE AND METHOD FOR GENERATING HOLOGRAM - A holographic display device and a method for generating a hologram are disclosed. The holographic display device generating a hologram may include a storage unit and a control unit. Herein, the storage unit may store at least one look-up table each having a partial size of a full size of sub-holograms for reconfiguring object points, wherein the object points are included in a scene reconfigured of the generated hologram. And, the control unit may use at least one look-up table each having the partial size, so as to calculate hologram values of the sub-holograms for reconfiguring object points, wherein the object points are included in the scene, and then the control unit may generate the hologram by overlapping the hologram values of the sub-holograms. | 08-29-2013 |
20130222874 | HOLOGRAPHIC DISPLAY DEVICE AND METHOD FOR GENERATING HOLOGRAM USING REDUNDANCY OF 3D VIDEO - A holographic display device and method of generating a hologram using redundancy of 3D video are disclosed. A storage unit stores the hologram of a previous 3D image frame. A control unit generates an update map indicating an update required 3D point among 3D points included in a current 3D image frame based on the current 3D image frame and the previous 3D image frame and modifies the update map to further include information indicating the update of a 3D point related to the update required. | 08-29-2013 |
20130235439 | HOLOGRAPHIC IMAGE REPRODUCTION MECHANISM USING ULTRAVIOLET LIGHT - A holographic image display system comprises a screen, a first and a second light source, a scanning mechanism, and a controller. The screen includes a photochromic material arranged thereon. The photochromic material has light absorption characteristics which change depending on illumination with a wavelength of an ultraviolet light beam. The first light source directs a visible light beam with a sufficiently large diameter onto the screen, whereas the second light source directs an ultraviolet light beam onto the screen through the scanning mechanism. The controller controls emissions and scanning of the ultraviolet light beam based on a holographic signal so that the ultraviolet light beam can be scanned across the screen. | 09-12-2013 |
20130258429 | CONFOCAL RAINBOW VOLUME HOLOGRAPHIC IMAGING SYSTEM - A confocal rainbow holographic imaging system and hologram fabrication method. The system employs a multi-spectral light source, a multiple grating volume hologram and a dual pass illumination and imaging pathway which provide for depth sectioning of an object, coverage of the full FOV of the system, and high lateral and depth resolution. Dual matched holograms are used to provide a high image contrast ratio. A method for fabricating the holograms employ a novel combination of design tools is also provided. | 10-03-2013 |
20130258430 | APPARATUS AND METHOD FOR RECORDING FRESNEL HOLOGRAMS - An apparatus for producing a hologram of an object includes a light source that emits an incoherent electromagnetic wave toward the object, and a masking device configured to display a mask, receive the incoherent electromagnetic wave emitted toward the object, mask the received incoherent electromagnetic wave according to the displayed mask, and produce a masked electromagnetic wave. The apparatus also includes an image recording device configured to capture an image of the masked electromagnetic wave, and a processing device configured to convert the image of the masked electromagnetic wave into the hologram of the object. A method for producing a hologram of an object is also described. | 10-03-2013 |
20130265622 | 2D/3D HOLOGRAPHIC DISPLAY SYSTEM - A display system ( | 10-10-2013 |
20130271800 | HOLOGRAPHIC DISPLAY SYSTEMS, METHODS AND DEVICES - Systems, devices and methods are described including providing infrared (IR) laser radiation to a Digital Micromirror Device (DMD) array and using the DMD array to spatially modulate the IR laser radiation. The spatially modulated IR laser radiation may then be projected to form a voxel array where each voxel of the array represents to a volume of air wherein the IR laser radiation has been focused sufficiently to cause air to ionize. The voxel array may then be spatially rotated. | 10-17-2013 |
20130293939 | VIEWER TRACKING IN A PROJECTION SYSTEM - Disclosed are methods and systems for displaying images, and for implementing volumetric user interfaces. One exemplary embodiment provides a system comprising: a light source; an image producing unit, which produces an image upon interaction with light approaching the image producing unit from the light source; an eyepiece; and a mirror, directing light from the image to a surface of the eyepiece, wherein the surface has a shape of a solid of revolution formed by revolving a planar curve at least 180° around an axis of revolution. | 11-07-2013 |
20130293940 | LIGHT MODULATION DEVICE - The present invention relates to a light modulator device with a spatial light modulator, a structured polariser means, a controllable polarisation means and a light wave multiplexing means. The spatial light modulator comprises discretely addressable modulator cells. Two modulator cells each are combined to form a modulation element. The modulator cells modulate light waves which are capable of generating interference of a propagating light wave field with holographic information in a spatially structured way such that a specifiable spatial distribution of object light points of a three-dimensional scene is holographically reconstructed. The modulator cells of each modulation element are adjacently arranged regarding the direction of propagation of the light wave field. The light which is modulated by adjacently arranged modulator cells is given different polarisation states by the structured polarizer means. | 11-07-2013 |
20130301091 | Encrypted synthetic hologram and method for reading such a hologram - The invention relates to an encrypted synthetic hologram formed from the Fourier transformation of an image ( | 11-14-2013 |
20130329268 | METHOD FOR ELIMINATING HOLOGRAM DC NOISE AND HOLOGRAM DEVICE USING THE SAME - A method for eliminating hologram DC noise and a hologram device using the same are provided. The method for processing the hologram includes: receiving input of hologram data; and implementing a differential operation with respect to the hologram data. Accordingly, the hologram data is processed by implementing the differential operation with respect to the hologram data, so that DC noise occurring when the hologram is reconstructed can be effectively eliminated. | 12-12-2013 |
20130329269 | COMPUTER IMPLEMENTED METHOD FOR GENERATING BINARY HOLOGRAMS - A numerical method of recording a two or three dimensional object scene in a binary hologram. When the binary hologram is illuminated with a reference beam, the original object scene can be reconstructed and observed by a viewer. As the hologram is binary, i.e. composed of black or white pixels, it can be printed with commodity printers. The process is simple, fast, and economical, hence decreasing the cost and time for hologram design and production. In addition, with binary holograms, the ability to store the holograms is enhanced and binary holograms facilitate efficient transmission of the holograms. | 12-12-2013 |
20130335795 | SPATIAL LIGHT MODULATOR AND HOLOGRAPHIC 3D IMAGE DISPLAY INCLUDING THE SAME - Provided is a complex spatial light modulator and a holographic 3D image display including the complex spatial light modulator. The complex spatial light modulator includes a spatial light modulator for modulating a phase or an amplitude of light, a pair of lens arrays, and a grating disposed between the pair of lens arrays. Accordingly, the phase and the amplitude of light may be modulated simultaneously. | 12-19-2013 |
20130342884 | Synthetic hologram reading device and method - The present invention involves a device for reading the source image of a synthetic hologram constituting the Fourier transform of the source image formed on a support ( | 12-26-2013 |
20140009807 | METHOD AND APPARATUS FOR SPACE DIVISION MULTIPLEXED COLOR HOLOGRAPHIC DISPLAY - Methods and an apparatus for color holographic display are provided. The method for color holographic display includes modifying a plurality of color component light beams by passing light from each of a plurality of color component light sources through a corresponding one of a plurality of color sub-hologram masks to generate a corresponding plurality of modified color component light beams. The plurality of modified color component light beams are color multiplexed to generate a multiplexed masked color light beam. The multiplexed masked color light beam is shined onto modulated computer generated holographic information corresponding to the object in order to reconstruct the object by diffracting each portion of the multiplexed masked color light beam to a location and at an intensity determined in response to a corresponding portion of the computer generated holographic information to create the object as a color holographic display. | 01-09-2014 |
20140036329 | APPARATUS AND METHODS FOR HOLOGRAPHIC DISPLAY - The present invention relates to a holographic display and more particularly to an apparatus and methods for a curved electro-holographic display. The apparatus mainly comprises; at least one light source for providing lights, at least one axially symmetric mirror for reflecting the fights coming from light source, at least one spatial light modulation system consists of one or more than one spatial light modulators for modulating lights reflecting from the axially symmetric mirror and forming a desired optical reconstruction above the axially symmetric mirror by reflecting the lights which is seen from a viewing zone by the user. | 02-06-2014 |
20140063577 | INFRARED LASER HOLOGRAPHIC PROJECTOR - Systems and methods for infrared laser holographic projection. In one example, an optical apparatus includes a first laser source configured to generate a first laser beam having a first wavelength in an infrared spectral range and a holographic medium optically coupled to the laser source and having a transmittance range including the first wavelength. A diffraction pattern formed in the holographic medium encodes an input image and is configured to diffract the first laser beam responsive to being illuminated by the laser beam so as to construct an image in the infrared spectrum, the image being a reconstruction of the input image. The diffraction pattern may further be configured to diffract a second laser beam having a second wavelength in a visible spectral range to construct an image including a first portion in the infrared spectral range and a second portion in the visible spectral range. | 03-06-2014 |
20140071506 | APPARATUS AND METHOD FOR ADJUSTING HOLOGRAPHIC IMAGE - A holographic object processing apparatus and method are provided. The holographic object processing apparatus may include a display device to output a holographic object, a database (DB) to store change information of the holographic object according to a distance between a control object and the holographic object, a distance measurement sensor to measure the distance between the control object and the holographic object, and a processing unit to extract change information corresponding to the measured distance from the DB and change the holographic object based on the extracted change information. The display device may output the changed holographic object. | 03-13-2014 |
20140104664 | OPTICALLY ADDRESSABLE SPATIAL LIGHT MODULATOR DIVIDED INTO PLURALITY OF SEGMENTS, AND HOLOGRAPHIC THREE-DIMENSIONAL IMAGE DISPLAY APPARATUS AND METHOD USING THE LIGHT MODULATOR - Provided are an optically addressable spatial light modulator (OASLM) divided into a plurality of segments, and an apparatus and method for displaying a holographic three-dimensional (3D) image using the OASLM. The holographic 3D image display apparatus includes a first light source which emits a write beam, an electric addressable spatial light modulator (EASLM) which modulates the write beam emitted from the first light source according to hologram information regarding a 3D image, a second light source which emits a read beam, an OASLM which receives the write beam modulated by the EASLM and modulates the read beam emitted from the second light source according to hologram information included in the modulated write beam, a scanning optical unit which projects the write beam modulated by the EASLM onto the OASLM, and a Fourier lens which focuses the read beam modulated by the OASLM onto a predetermined space to form the 3D image. | 04-17-2014 |
20140118806 | Apparatus and Method for Displaying a Video Image - A method of displaying a video image comprises receiving sequential image frames at a processor. Each image frame is processed to obtain a kinoform. A programmable diffractive element such as an SLM represents the sequence of kinoforms allowing reproduction of the image using a suitable illumination beam. | 05-01-2014 |
20140132998 | HOLOGRAPHIC IMAGING - Technologies are generally described for generating a holographic image on a transparent screen such that a user can view another scenery image though the screen along with the generated holographic image. Example devices may include an ultraviolet light irradiation unit configured to irradiate an ultraviolet light towards a hologram generating unit. The holographic generating unit may be configured to generate a hologram image in response to the received ultraviolet light. Further, the light irradiation unit and the hologram generating unit may be operable to project the hologram image onto a transparent screen coated with a photochromic material. The light transmittance of the photochromic material coated on the transparent screen may change when a light beam with a specific frequency range is irradiated on the photochromic material. The example device may further include a hologram reconstruction light source configured to irradiate a hologram reconstruction light on the transparent screen. | 05-15-2014 |
20140146373 | APPARATUS AND METHOD FOR GENERATING HOLOGRAM PATTERN - Provided is an apparatus and method for generating a hologram pattern with a reduced amount of computation. The apparatus may include a reference depth layer setting unit configured or having a capacity to set a reference depth layer using data associated with a three-dimensional (3D) object, a first hologram pattern generating unit configured to generate a first hologram pattern corresponding to the 3D object in the reference depth layer, and a second hologram pattern generating unit configured to generate a second hologram pattern in a hologram plane using the first hologram pattern. | 05-29-2014 |
20140160543 | HOLOGRAPHIC IMAGING OPTICAL DEVICE - In relation to a field of creating and processing a digital image, a compact portable device for generation and observation of dynamic and static holograms is provided. A system including a holographic display may be based on reconstruction and transmission of a wavefront encoded with a spatial light modulator while preserving information about a wave amplitude and a phase. Due to such features of the holographic process, an optical device may restore a wavefront similar to a wavefront coming from real objects. | 06-12-2014 |
20140198361 | HOLOGRAPHIC DIRECT VIEW DISPLAY HAVING AN APODIZATION DEVICE - The invention relates to apodization in a holographic direct view display. Known apodization functions are utilized/modified for an apodization mask such that the functions reduce the intensities of selected higher magnitudes of diffractions. The holographic direct view display comprises a controllable light modulator having modulator cells and modulating impinging coherent light into a phase and/or amplitude, and an array of apodization masks. The apodization masks have the same apodization function for a predetermined group of modulator cells, by means of which function a complex amplitude transparency can be set for the modulator cells. This transparency corresponds to an individually predefined course of intensity in a far field of the light modulator, wherein the predefined course of intensity includes a reducing of the light intensity of higher magnitudes of diffractions, and/or of the interfering light emitted by the light modulator. | 07-17-2014 |
20140211286 | APPARATUS AND METHOD FOR GENERATING DIGITAL HOLOGRAM - Disclosed are an apparatus and a method for generating a digital hologram for reproducing a 3D stereoscopic image, and more particularly, an apparatus and a method for generating a digital hologram, which generate the digital hologram by receiving a depth information pre-processing process of generating first depth map information constituted by a first depth level and second depth map information constituted a second depth level by receiving color image information from an imaging unit. | 07-31-2014 |
20140240806 | Holographic exposing and capturing screens - This invention offers the construction of the holographic screen exposing and capturing three-dimensional video images. Exposing holographic screen is the construction comprising two screens placed on the certain distance from each another. The rear screen is the matrix of the light emitting elements. The front screen is the matrix of the light transmitting elements. In the certain moment the matrix of the rear screen provide the introjection of the image passing through the transparent point of the front screen making the anisotropic emission of the desired configuration. In the next time slice the introjection of the next image occurs through the neighboring point etc. The construction of the capturing holographic screen is the same with the construction of the exposing holographic screen, but the rear screen is the light absorbing matrix instead of the light emitting. | 08-28-2014 |
20140253985 | SYSTEM FOR ORDER ALIGNMENT OF DIFFRACTIVELY PRODUCED IMAGES - A system for order alignment of diffractively produced images is provided. The system comprises: a diffractive spatial light modulator (DSLM) configured to provide a computer generated hologram of an image; a substantially coherent light source configured to illuminate the DSLM which responsively produces the image along each of different diffractive order paths; and, at least one set of optical components located along respective diffractive order paths of the DSLM, the at least one set of optical components configured to align at least one respective image diffracted from the DSLM with at least another diffracted image at a common image plane. | 09-11-2014 |
20140253986 | Image Photography Method, Image Photography Play Method, Spatial Lighting Modulator, Image Play Device, and Digital Hologram Forming Device - Submitted is an image photography play method which is suited to playing a stereoscopic video. The image photography method comprises: a step of forming a hologram pattern from a reference light and a subject light; a step of digitally processing the obtained hologram pattern; a step of writing the digitized hologram pattern as a magnetized vector pattern to a spatial lighting modulator which is formed from a magneto-optical material; and a step of inputting linearly polarized light into the spatial lighting modulator and playing an image according to the digitized hologram pattern. | 09-11-2014 |
20140253987 | Iterative Phase Retrieval With Parameter Inheritance - An iterative method of retrieving phase information in the Fourier domain representative of the n | 09-11-2014 |
20140293385 | COURSE INTEGRAL HOLOGRAPHIC DISPLAY - A holographic display system for generating a super hologram with full parallax in different fields of view in the horizontal and vertical directions. The system includes an array of holographic display devices, e.g., spatial light modulators (SLMs), operable to provide a plurality of holographic images of a scene from differing viewpoints of the scene. Each SLM is operated concurrently to output a narrow field of view, elemental hologram. The system includes coarse integral optics combining the holographic images into a single hologram (“super hologram”) viewable in a hologram image plane a distance from the course integral optics. The coarse integral optics combine the holographic images by providing angular tiling of the holographic images, e.g., bending the axes of parallel lenses. In this manner, the field of view, in one direction, of the super hologram is based on the number of holographic display devices provided in the array in one direction. | 10-02-2014 |
20140293386 | Holographic Image Display Device and Method for Driving the Same - Disclosed are a holographic image display device and a method for driving the same which may stabilize luminance of a holographic image and reduce flicker. The holographic image display device includes a laser backlight unit, a surface light converter converting laser light emitted from the laser backlight unit into surface light-type laser light and emitting the surface light-type laser light, a spatial light modulator (SLM) implementing an input holographic interference pattern and projecting a holographic image at a viewing point using the surface light-type laser light, and an optical switching unit located between the laser backlight unit and the SLM and controlling polarization of the laser light. The optical switching unit blocks laser light emitted to the SLM in a blocking mode, and transmits the laser light emitted to the SLM in a transmission mode. | 10-02-2014 |
20140293387 | GREY-SCALE HOLOGRAPHIC STRUCTURE AND SYSTEM FOR GENERATING A MILLIMETER-WAVE COLLIMATED WAVEFRONT IN A COMPACT RANGE - Embodiments of a grey-scale holographic structure and system for generating a collimated wavefront in a compact range are generally described herein. In some embodiments, the grey-scale holographic structure comprising millimeter-wave transmissive material having a surface arranged to provide differing amounts of phase-delay to an incident millimeter-wave wavefront as the incident wavefront passes through the material. The grey-scale holographic structure may comprises a plurality of layers (N) to provide a phase total delay of lambda which results from a series tuned layers, each having a thickness of a wavelength/N. Each layer provides a predetermined amount of phase delay allowing the structure to operate as a phase-delay hologram. | 10-02-2014 |
20140293388 | LIGHT MODULATION CONTROL METHOD, CONTROL PROGRAM, CONTROL DEVICE AND LASER BEAM IRRADIATION DEVICE - In the control of light condensing irradiation of laser light using a spatial light modulator, the number of wavelengths, a value of each wavelength, and incident conditions of the laser light are acquired, the number of light condensing points, and a light condensing position, a wavelength, and a light condensing intensity on each light condensing point are set, and a distortion phase pattern provided in an optical system including the spatial light modulator to the laser light is derived. Then, a modulation pattern presented in the spatial light modulator is designed in consideration of the distortion phase pattern. Further, in the design of a modulation pattern, a design method focusing on an effect by a phase value of one pixel is used, and when evaluating a light condensing state, a propagation function to which a distortion phase pattern is added is used. | 10-02-2014 |
20140300941 | METHOD AND APPARATUS FOR GENERATING HOLOGRAM BASED ON MULTI-VIEW IMAGE - Disclosed are a method and apparatus for generating a hologram based on a multi-view image. The method of generating a hologram image may include receiving a multi-view image and calculating depth information about an image at each view of the multi-view image, calculating an integrated 3-D space datum based on the multi-view image and the pieces of depth information, and generating hologram information from the integrated 3-D space datum. Accordingly, a natural 3-D image can be played because a 3-D image corresponding to an observer view is reproduced without a process of generating in-between view images and pieces of corresponding depth information when the observer moves. | 10-09-2014 |
20140307298 | APPARATUS AND METHOD FOR GENERATING HOLOGRAM PATTERN - A method and apparatus for generating a hologram pattern using depth quantization may generate a hologram pattern corresponding to a three-dimensional (3D) object in a hologram plane using color image information of the 3D object and a point of the 3D object included in a quantized depth layer. | 10-16-2014 |
20140313555 | DIGITAL HOLOGRAM SYNTHESIS METHOD AND APPARATUS - Provided are a digital hologram synthesis method and apparatus based on an angular spectrum. The digital hologram synthesis method includes representing an input digital hologram as at least one angular spectrum region by applying Fourier transformation to the input digital hologram, registering the at least one angular spectrum region by projecting the at least one angular spectrum region onto a spherical surface, and generating a synthesis digital hologram based on the registered at least one angular spectrum region. Accordingly, it is possible to generate a new digital hologram with a different orientation or at a different distance using an angular spectrum of a digital hologram generated in advance, without geometric information of an object. In addition, it is possible to readily and intuitively synthesize a new digital hologram while viewing an image visualized in a 3D space. | 10-23-2014 |
20140327942 | METHOD FOR PREPARING A HOLOGRAM RECORDING MEDIUM - Two original images to be recorded are prepared as data (S | 11-06-2014 |
20140327943 | SYSTEM, APPARATUS AND METHOD FOR EXTRACTING IMAGE CROSS-SECTIONS OF AN OBJECT FROM RECEIVED ELECTROMAGNETIC RADIATION - An apparatus and method to produce a hologram of a cross-section of an object includes an electromagnetic radiation assembly configured to receive a received electromagnetic radiation, such as light, from the object. The electromagnetic radiation assembly is further configured to diffract the received electromagnetic radiation and transmit a diffracted electromagnetic radiation. An image capture assembly is configured to capture an image of the diffracted electromagnetic radiation and produce the hologram of the cross-section of the object from the captured image. The hologram of the cross-section includes information regarding a single cross-section of the object. | 11-06-2014 |
20140327944 | HOLOGRAM PROCESSING METHOD AND SYSTEM - The invention relates to a hologram, or holographic intensity data, processing method and system. The system implements the method which comprises receiving holographic intensity data comprising at least a holographic intensity pattern or image at a discrete location in a propagation space, the propagation space comprising the three-dimensional space over which light waves or illumination forming the holographic intensity pattern propagates. The method comprises determining one or more data key-points of at least one potential object of interest ( | 11-06-2014 |
20140333977 | DISPLAY DEVICE - Provided is a display device. The display device includes a backlight unit generating a plurality of flat lights and a spatial light modulator (SLM) unit generating an interference pattern by using the plurality of lights according to hologram data and displaying a hologram based on the generated interference pattern. The backlight unit is manufactured as an organic light emitting diode including a plurality of quantum dots. | 11-13-2014 |
20140355085 | INFRARED HOLOGRAPHIC PROJECTOR FOR THERMAL MASKING AND DECOYS - A holographic structure, system and method project a grey-scale image in a narrow IR spectral band that is related to a broadband thermal signature of an object. The projected grey-scale image, when integrated over the broadband, forms either a decoy that approximates the thermal signature of the object or a mask that obscures the thermal signature of the object. The projected image is a tuned phase recording of a desired far field projection. In different embodiments, the projected image is a “positive” or a “negative” image of the object's thermal signature, a difference image between the thermal signatures of a false object and the object or a camouflage image of random features having approximately the same spatial frequency as the object's thermal signature. The goal being to confuse or fool, even for a short period of time, the warfighting or surveillance system or human observer that uses a broadband IR sensor to acquire and view thermal images of the scene. | 12-04-2014 |
20140355086 | DISPLAY DEVICE USING COMPUTER GENERATED HOLOGRAM - The instant application discloses a display device including a pattern generator configured to generate a diffraction pattern from an image; a light source configured to emit emission light; an optical condenser which condenses the emission light to generate illumination light; and a spatial light modulator which diffracts the illumination light according to the diffraction pattern to generate diffracted light. The diffracted light passes through the optical condenser. | 12-04-2014 |
20150009546 | Holographic Film and Recording Method - This invention relates to holographic film for recording multicolor volume holograms, especially full color volume reflection holograms, and to manufacturing techniques for such film, and to corresponding methods of recording multicolor and full-color volume, in particular volume reflection holograms. We describe a holographic film for recording a multicolor volume hologram, the film comprising: a carrier; a first photosensitive recording layer sensitive to one or both of red and green laser light; and a second photosensitive recording layer sensitive to blue laser light. Both the first and second photosensitive recording layers comprise silver halide and have a grain size of less than 30 nm, and at least one of the photosensitive recording layers has a thickness of greater than 3 μm and less than 5 μm. | 01-08-2015 |
20150015928 | Novel method of fast fourier transform (FFT) analysis using waveform-embedded or waveform-modulated coherent beams and holograms - Method of Fast Fourier Transform (FFT) Analysis for collecting waveforms and other vibrational intelligence and modulating or embedding same into one or more coherent reference beams of an n-dimensional holographic recording device for producing one or more holograms of objects, including singularity points in space. The result provides wholesale differentiation of waveforms distinguishable from others based on their spectral characteristics. When said holograms are presented with reference beams of vibrational waveforms having similar characteristics to those which were present during recording of the original objects, phantoms of the original objects or subjects will reconstruct themselves in space with an energy glow of intensity that varies thusly with the degree of similarity between the waveform modulations of the reconstructing wavefronts and those of that same which were used to originally record said objects. Said n-dimensional description space can be sampled of the said glowing phantoms. | 01-15-2015 |
20150029565 | DEVICE AND METHOD FOR FEEDBACK BASED DIGITAL HOLOGRAPHIC CONTENT RECONSTRUCTION VERIFICATION - Provided are a device and a method for feedback based digital holographic content reconstruction verification. The device may include a generator to generate a holographic content by receiving a first parameter value, a reconstructor to reconstruct a hologram from the holographic content, and a feedback based interface to adjust the first parameter value to be a second parameter value by receiving feedback on the hologram. | 01-29-2015 |
20150029566 | METHOD OF CODING A HOLOGRAPHIC PATTERN, A CORRESPONDING CODING DEVICE AND COMPUTER PROGRAM - A method for coding at least one holographic pattern recording a light signal representative of light received by a perspective object in a scene. The method includes: determining, from the light signal and for each point x | 01-29-2015 |
20150036199 | METHOD OF COMPUTING A HOLOGRAM - A method of computing a hologram by determining the wavefronts at the approximate observer eye position that would be generated by a real version of an object to be reconstructed. In normal computer generated holograms, one determines the wavefronts needed to reconstruct an object; this is not done directly in the present invention. Instead, one determines the wavefronts at an observer window that would be generated by a real object located at the same position of the reconstructed object. One can then back-transforms these wavefronts to the hologram to determine how the hologram needs to be encoded to generate these wavefronts. A suitably encoded hologram can then generate a reconstruction of the three-dimensional scene that can be observed by placing one's eyes at the plane of the observer window and looking through the observer window. | 02-05-2015 |
20150077818 | CONVERTING COMPLEX HOLOGRAMS TO PHASE HOLOGRAMS - Fast processing of information represented in digital holograms is provided to facilitate converting a complex Fresnel hologram into a single phase-only hologram, which can be called a bidirectional error diffusion (BERD) hologram, for displaying 3-D holographic images representative of a 3-D object scene on a display device. The BERD hologram can be capable of representing a 3-D object scene and preserving favorable visual quality on the reconstructed holographic image. A holographic generator component (HGC) can receive or generate a complex Fresnel hologram representing a 3-D object scene. The HGC can directly apply the BERD process to the complex Fresnel hologram to facilitate converting the complex Fresnel hologram into a phase-only hologram. Alternatively, the HGC can directly apply a unidirectional error diffusion process to the complex Fresnel hologram to facilitate converting the complex Fresnel hologram into a phase-only hologram. | 03-19-2015 |
20150077819 | Synthetic Optical Holography - Methods and apparatus for imaging a phase or amplitude that characterizes a scattered field emanating from a physical medium. A local probe is stepped to a plurality of successive probe positions and illuminated with an illuminating beam, while a specified phase function is imposed on a reference beam relative to the illuminating beam. A field associated with the scattered field is superimposed with the reference beam and the detection of both yields a detected signal which is recorded as a function of probe position in order to obtain a hologram. The holograph is transformed, filtered, and retransformed to generate an image. Alternatively, the illuminating beam may directly illuminate successive positions of the physical medium. | 03-19-2015 |
20150085331 | WIDE-VIEWING ANGLE HOLOGRAPHIC DISPLAY APPARATUS - A holographic display apparatus is provided. The holographic display apparatus may include an input optical unit to illuminate coherent parallel light to a spatial light modulator (SLM), the SLM to generate a plurality of hologram-modulated diffraction beams by illuminating the coherent parallel light in a plurality of directions, or to generate hologram-modulated higher-order diffraction beams by illuminating the coherent parallel light in a single direction, and an optical imaging unit to reproduce at least one holographic three-dimensional (3D) image with different viewpoints on a single imaging area, using the generated at least one diffraction beam. | 03-26-2015 |
20150116798 | SCALABLE AND TILEABLE HOLOGRAPHIC DISPLAYS - A holographic display system for generating a super hologram with full parallax in different fields of view in the horizontal and vertical directions. The display system includes assemblies or subsystems each adapted to combine holographic displays and coarse integral displays to produce or display a coarse integral hologram. The display system is adapted to combine such displays or display systems to add more detail or information. For example, the display system can be assembled as if it were made up of “holographic bricks” that can be stacked and combined to provide a unique image/output. Briefly, the display system described herein teaches techniques for combining coarse integral holographic (CIH) displays in a seamless and scalable manner, e.g., a display system where multiple spatial light modulators (SLMs) can be placed or provided behind coarse integral optics. | 04-30-2015 |
20150116799 | IMAGE PROCESSING APPARATUS AND METHOD OF ASSEMBLING THE SAME - A reddish collimated beam and a greenish collimated beam respectively emitted from one and another light emitters are separately radiated to different conversion regions of a phase modulation array. In the phase modulation array, phases of components of light are converted through a plurality of pixels, thereby obtaining a modulated beam that is an interfered beam. An image of the modulated beam is formed on a screen to generate a holographic image. The one light emitter and the other light emitter are each configured as a separate block, stacked one on top of another on a reference base, and separately positioned and secured. | 04-30-2015 |
20150116800 | IMAGE PROCESSING APPARATUS - The phase of laser light is modulated by a phase modulating array, and a hologram image is projected on a rotating screen. Light emission of the laser light is driven by PWM modulation so that a light emission period and a non-light emission period following the light emission period are repeated. In a case where the luminance of the hologram image is changed, the duty ratio of the light emission period is changed. In a case where the luminance is significantly reduced, the light emission intensity of the laser light is reduced without changing the duty ratio. Since the duty ratio is not reduced, a light diffusion condition on the rotating screen can be randomized even in a case where the luminance is reduced. | 04-30-2015 |
20150124302 | METHOD FOR ENCODING A HOLOGRAM IN A LIGHT MODULATION DEVICE - A hologram is constructed from individual subholograms assigned to corresponding encoding regions in a light modulation device and respectively assigned to an object point of the object to be reconstructed with the hologram. With a virtual observer window, a defined viewing region is provided through which a reconstructed scene in a reconstruction space is observed by an observer. A complex value of a wavefront for each individual object point is calculated in the virtual observer window. Each individual amplitude of a complex value of a wavefront in the virtual observer window is subsequently multiplied by a correction value with which a correction of the angle selectivity of at least one volume grating arranged downstream in the beam path of the light modulation device is carried out. The corrected complex values determined in this way for all object points are summed and transformed into the hologram plane of the light modulation device. | 05-07-2015 |
20150131133 | FAST GENERATION OF PURE PHASE DIGITAL HOLOGRAMS - Fast processing of information represented in digital holograms is provided to facilitate generating a phase-only hologram for displaying 3-D holographic images representative of a 3-D object scene on a display device. A holographic generator component (HGC) can receive or generate visual images, comprising depth and parallax information, of a 3-D object scene. A hologram processor component can downsample an intensity image of a visual image of the 3-D object scene using a uniform or random lattice to facilitate converting the intensity image to a sparse image. The hologram processor component can generate a complex 3-D Fresnel hologram, comprising the depth and parallax information, based on the sparse image using a fast hologram generation algorithm. The hologram processor component modify the magnitude of the pixels of the complex hologram to a defined homogeneous value to facilitate converting the complex hologram to a phase-only hologram. | 05-14-2015 |
20150138613 | APPARATUS AND METHOD FOR DISPLAYING PSEUDO-HOLOGRAM IMAGE BASED ON PUPIL TRACKING - Provided are an apparatus and a method for displaying a hologram image based on pupil tracking, wherein a hologram image display apparatus includes a location determiner to determine a location of a user using a captured image of the user and a hologram information reconstructor to reconstruct first hologram information as second hologram information optimized for the location of the user to reproduce the hologram image. | 05-21-2015 |
20150146269 | HOLOGRAPHIC CONTENT PROVIDING METHOD, AND HOLOGRAPHIC CONTENT PROVIDING APPARATUS AND DISPLAY APPARATUS USING THE METHOD - A holographic content providing method, and a holographic content providing apparatus and a display apparatus using the method may capture and generate holographic content using a real object, a virtual object and lighting information, and may conduct integrated processing on the generated holographic content, such as direct edition, advance visualization, data format conversion, element technologies for optical reconstruction and manufacture process management techniques of holographic content, thereby producing ultrahigh-quality interactive holographic content. | 05-28-2015 |
20150293497 | HOLOGRAPHIC DISPLAY - A holographic display includes: a light source; at least one beam steerer configured to control a propagation direction of a beam emitted from the light source; an optical element configured to condense a beam passing through the at least one beam steerer; and a spatial light modulator configured to form a three-dimensional (3D) image by modulating a beam passing through the at least one beam steerer. | 10-15-2015 |
20150293499 | SYSTEM, APPARATUS AND METHOD FOR EXTRACTING THREE-DIMENSIONAL INFORMATION OF AN OBJECT FROM RECEIVED ELECTROMAGNETIC RADIATION - An apparatus and method to produce a hologram of an object includes an electromagnetic radiation assembly configured to receive a received electromagnetic radiation, such as light, from the object. The electromagnetic radiation assembly is further configured to diffract the received electromagnetic radiation and transmit a diffracted electromagnetic radiation. An image capture assembly is configured to capture an image of the diffracted electromagnetic radiation and produce the hologram of the object from the captured image. | 10-15-2015 |
20150301256 | OPTICAL OBSERVATION DEVICE - An optical observation system includes a spatial light modulator displaying a Fresnel type kinoform on a phase modulation plane, and modulating light L | 10-22-2015 |
20150309472 | PHASE MODULATION METHOD AND PHASE MODULATING DEVICE - A phase distribution is calculated such that modulated light has a predetermined intensity distribution on a target plane and displayed on a phase modulation plane, readout light enters the phase modulation plane so as to generate the modulated light. When calculating the phase distribution, a region on the phase modulation plane is divided into N regions A | 10-29-2015 |
20150323899 | ANALYTIC METHOD FOR COMPUTING VIDEO HOLOGRAMS IN REAL TIME - An analytical method for computing a video hologram for a holographic reproduction device having at least one light modulation means is disclosed, wherein a scene split into object points is encoded as a whole hologram and can be seen as a reconstruction from a visibility region, located within a periodicity interval of the reconstruction. The visibility region, together with each object point of the scene to be reconstructed, defines a sub-hologram and the whole hologram is generated from a superposition of sub-holograms, wherein the complex hologram values of a sub-hologram are determined from the wave front of the respective object point to be reconstructed in a modulator region of the light modulation means, by calculating and evaluating the transmission or modulation functions of an imaging element formed in the modulator region. The object point to be reconstructed is located in the focal point of the imaging element. | 11-12-2015 |
20150323900 | METHOD AND APPARATUS FOR ENHANCEMENT OF RESOLUTION AND WIDE VIEWING ANGLE DIGITAL HOLOGRAPHIC SYSTEM - An apparatus and method for enhancing a resolution and a wide viewing angle of a holographic system is provided, the method including determining a multiple N of a target resolution and a wide viewing angle based on a resolution of a spatial light modulator (SLM) and an angle of view of a condensing lens, generating a plurality of hogels from a target image based on the determined multiple N of the target resolution and wide viewing angle, and recording the target image on a recording medium using a condensed beam obtained from a parallel beam that loads the plurality of hogels passing through the condensing lens. | 11-12-2015 |
20150331297 | SPATIAL LIGHT MODULATOR INCLUDING NANO-ANTENNA ELECTRODE AND DISPLAY APPARATUS INCLUDING THE SPATIAL LIGHT MODULATOR - A spatial light modulator including an electrode having a nano-antenna structure, and a display apparatus including the spatial light modulator are provided. The spatial light modulator includes a refractive index changing layer, and a pixel electrode and a common electrode which are configured to apply an electric field to the refractive index changing layer, and at least one of the pixel electrode and the common electrode include a nano-antenna pattern structure configured to resonate light. | 11-19-2015 |
20150346491 | Holographic Image Projection with Holographic Correction - There is provided a method of projection using an optical element ( | 12-03-2015 |
20150355597 | PROJECTION DEVICE AND METHOD FOR HOLOGRAPHIC RECONSTRUCTION OF SCENES - A holographic reconstruction of scenes includes a light modulator, an imaging system with at least two imaging means and an illumination device with sufficient coherent light for illumination of hologram coded in the light modulator. The at least two imaging means are arranged such that a first imaging means is provided for the magnified imaging of the light modulator on a second imaging means. The second imaging means is provided for imaging of a plane of a spatial frequency spectrum of the light modulator in a viewing plane at least one viewing window. The viewing window corresponds to a diffraction order of the spatial frequency spectrum. | 12-10-2015 |
20150362651 | METHOD FOR DESIGN AND MANUFACTURING OF OPTICS FOR HOLOGRAPHIC SIGHT - A method for design and fabrication of holographic optical elements for a compact holographic sight is proposed. The method includes use of ray-trace software to design holographic elements having optical power using an intermediate hologram with parameters obtained through minimization of the merit function defining image quality. | 12-17-2015 |
20160004219 | PROJECTION DISPLAY AND METHOD FOR DISPLAYING AT LEAST ONE OF TWO-DIMENSIONAL AND THREE-DIMENSIONAL SCENE OR OF CONTENT - A projection device is provided for displaying at least one of a two-dimensional and three-dimensional scene or of content. The projection device comprises an illumination device, at least two spatial light modulator devices and an optical system. The illumination device comprises at least one light source for generating a holographic illumination. One of said spatial light modulator devices is designed as spatial light modulator device modulating at least the phase of the light for the holographical generation of illumination patterns. This spatial light modulator device as first spatial light modulator device is followed by a second spatial light modulator device. The optical system is disposed to illuminate the second spatial light modulator device with a predefinable light distribution generated by the first spatial light modulator device. | 01-07-2016 |
20160004220 | HOLOGRAPHIC PROJECTION DEVICE FOR THE ENLARGEMENT OF A VISIBILITY REGION - A holographic projection apparatus and a method for magnifying a virtual visibility region, for observing a reconstructed scene with at least one light modulation device and with at least one light source having sufficiently coherent light for generating a wavefront of a scene that is coded in the light modulation device. By means of imaging the wavefront into a viewer plane, it is possible to generate the virtual visibility region for observing the reconstructed scene. The virtual visibility region has at least two virtual viewer windows. In this case, the virtual viewer windows are dimensioned such that the reconstructed scene can always be observed without tracking of the viewer windows upon movement of a viewer in the viewer plane. | 01-07-2016 |
20160011565 | APPARATUS AND METHOD FOR DISPLAYING HOLOGRAPHIC 3D IMAGE | 01-14-2016 |
20160018786 | FLUORESCENCE RECEIVING APPARATUS AND FLUORESCENCE RECEIVING METHOD - A fluorescence receiving apparatus comprises an excitation light source, a spatial light modulator of a phase modulation type for phase-modulating excitation light to obtain phase-modulated light, a focusing optical system configured to focus the phase-modulated light to a specimen, a specimen stage for supporting the specimen, a fluorescence receiver for receiving fluorescence generated by focus of the phase-modulated light to the specimen, a control unit for displaying a first CGH on the spatial light modulator, and a correction unit for correcting the first CGH. The correction unit comprises a receiver-specific sensitivity information storage preliminarily acquiring and storing sensitivity information per reception position specific to the fluorescence receiver, and a second hologram generator for correcting the first CGH, based on intensities of the fluorescence and the sensitivity information, to generate a second CGH. The control unit displays the second CGH on the spatial light modulator. | 01-21-2016 |
20160033934 | HOLOGRAM GENERATION APPARATUS AND METHOD - Provided is a hologram generation apparatus based on a hologram imaging system, which includes an object space, where an object is situated, and a retina space or region, where an image is formed within an eyeball of an observer. The hologram generation apparatus comprises: a modeling unit for generating first graphic data by transforming a 3D image of a 3D object to a set of polygonal facets; a data transformation unit for generating second graphic data by transforming the first graphic data from the modeling unit to normal/reference coordinates in the retina region; a hologram generation unit for generating a first computer generated hologram (CGH1), which is light wave analysis data for the second graphic data; and a hologram transformation unit for transforming the first computer generated hologram (CGH1) in the retina region to a second computer generated hologram (CGH2) in the object space. | 02-04-2016 |
20160033935 | HOLOGRAPHY REPRODUCING APPARATUS AND HOLOGRAPHY REPRODUCING METHOD - A holography reproducing apparatus and a holography reproducing method are provided. The holography reproducing apparatus includes: a backlight configured to emit light, and a spatial light modulator configured to modulate light input from the backlight and transmit the modulated light to generate a transmissive hologram image, wherein at least one of a wave front of light emitted from the backlight and the spatial light modulator has a curved surface. | 02-04-2016 |
20160041523 | SYSTEM AND METHOD FOR APPLYING ORTHOGONAL LIMITATIONS TO LIGHT BEAMS USING MICROELECTROMECHANICAL SYSTEMS - A system for generating a light beam having a plurality of orthogonal function modes includes a light source for generating a plane wave light beam. A MicroElectroMechanical (MEM) system including an array of micro-mirrors for generating the light beam having the plurality of orthogonal function modes applied thereto responsive to the plane wave light beam and control signals for controlling the array of micro-mirrors. A controller generates the control signals to control a position of each of a plurality of micro-mirrors of the array of micro-mirrors. The controller controls the position of the micro-mirrors to generate a plurality of holograms for applying the plurality of orbital angular momentum modes to the plane wave light beam responsive to the control signals. | 02-11-2016 |
20160041524 | METHOD AND APPARATUS FOR GENERATING HOLOGRAM - A method of generating a hologram includes receiving three-dimensional (3D) image data, dividing 3D image data into data groups which are independent from one another, by a first processor; calculating, from at least one of the data groups, hologram values to be displayed at respective positions on a hologram plane, by the first processor; calculating, from at least another one of the data groups, hologram values to be displayed at the respective positions on the hologram plane by a second processor, and summing the calculated hologram values for each of the respective positions on the hologram plane, by the first processor or the second processor, or by the first processor and the second processor in parallel. | 02-11-2016 |
20160077489 | HOLOGRAPHIC IMAGE DISPLAY SYSTEM - Disclosed are methods and systems for displaying images, and for implementing volumetric user interfaces. One exemplary embodiment provides a system comprising: a light source; an image producing unit, which produces an image upon interaction with light approaching the image producing unit from the light source; an eyepiece; and a mirror, directing light from the image to a surface of the eyepiece, wherein the surface has a shape of a solid of revolution formed by revolving a planar curve at least 180° around an axis of revolution. | 03-17-2016 |
20160091861 | DISPLAYING METHOD, APPARATUS AND SYSTEM FOR PROVIDING HOLOGRAPHIC IMAGES TO A PLURALITY OF VIEWERS SIMULTANEOUSLY - A displaying method, a displaying apparatus and a displaying system for providing holographic images to a plurality of viewers simultaneously are provided. The displaying method comprises: tracking motions of M viewers and eye positions thereof, adjusting rotation angles of programmable mirrors allocated to each of the viewers according to the motions of the eye positions of the viewer, it is predefined that each pixel position of the projection screen corresponds to N adjacent ones of the programmable mirrors; modulating a corresponding left-eye 3D image and a corresponding right-eye 3D image according to the tracked motions of the eye positions of each of the viewers and the rotation angles of the programmable mirrors allocated to the viewer, and projecting the left-eye 3D image and the right-eye 3D image onto the projection screen to control optical projections incident to the left eyes and the right eyes of different viewers. | 03-31-2016 |
20160109851 | NEURAL CONTROL HOLOGRAPHY - Neural control of holograms is provided to facilitate improving the viewing pleasure of a viewer. A holographic processor component can generate holograms representing a multi-dimensional object scene. A sensor component can detect brain waves of the viewer at different frequency bands. The holographic processor component can analyze the brain waves at difference frequency bands to determine respective strengths of the brain waves at different frequency bands. The holographic processor component can determine an adjustment(s) to be made to a parameter(s) of an optical setting associated with the holograms based on the respective strengths of the brain waves at different frequency bands. The holographic processor component can adjust the optical setting for the holograms based on the parameter adjustment(s) to facilitate generating and displaying holograms that have been modified in response to the detected brain waves at different frequency bands to facilitate customizing the holograms for the viewer. | 04-21-2016 |
20160132021 | DEVICE AND METHOD FOR CALCULATING HOLOGRAPHIC DATA - An apparatus and a method for optimized calculation of 2D sub-holograms for object points of a three-dimensional scene and a pipeline for real-time calculation of holograms are provided. The invention shortens the calculation time of a hologram for representing a three-dimensional scene and/or to reduce the calculation complexity of such a hologram. This is achieved by a 2D sub-hologram of an object point, which has image elements of the spatial light modulator, comprises a half 1D sub-hologram, where the radius of each image element is determined and each image element of the 2D sub-hologram is fixedly assigned to at least one image element of the half 1D sub-hologram with identical or similar radius by way of an electronic circuit, by a method for encoding a hologram, and by a pipeline on the basis of FPGA and/or ASIC. | 05-12-2016 |
20160139559 | OPTICAL PROCESSING - A modular routing node includes a single input port and a plurality of output ports. The modular routing node is arranged to produce a plurality of different deflections and uses small adjustments to compensate for wavelength differences and alignment tolerances in an optical system. An optical device is arranged to receive a multiplex of many optical signals at different wavelengths, to separate the optical signals into at least two groups, and to process at least one of the groups adaptively. | 05-19-2016 |
20160139561 | FULL-COLOR INCOHERENT DIGITAL HOLOGRAPHY - In one embodiment, a color holographic image is created by generating a separate complex hologram for each of multiple different colors of an object field illuminated with incoherent light, combining the separate complex holograms to obtain a color complex hologram, and generating a reconstructed color holographic image of the object field. | 05-19-2016 |
20160154377 | SYSTEM, APPARATUS AND METHOD FOR EXTRACTING THREE-DIMENSIONAL INFORMATION OF AN OBJECT FROM RECEIVED ELECTROMAGNETIC RADIATION | 06-02-2016 |
20160161914 | A SYSTEM AND METHOD FOR DISPLAYING AND CAPTURING HOLOGRAPHIC TRUE 3D IMAGES - The present invention relates to a system and method for displaying and capturing holographic true 3D images. The system comprises elements which may form both a wide viewing angle holographic true 3D display and a holographic true 3D video camera. The system mainly comprises a light source, a spatial light modulator or an electro-optical capturing device in different embodiments of the invention, a curved mirror, a computer and a beam splitter and opaque mask in some embodiments of the invention. | 06-09-2016 |
20160187850 | DATA FORMAT FOR HOLOGRAM, AND APPARATUS AND METHOD FOR HOLOGRAPHIC VIDEO SYSTEM - A holographic image processing method and a holographic image display method are provided. The holographic image processing method performed by a holographic image processing apparatus may include acquiring a holographic image, encoding the holographic image by quantizing the holographic image to improve at least one of a temporal correlation, a spatial correlation, and a channel correlation of the acquired holographic image, and generating the encoded holographic image. | 06-30-2016 |
20160187851 | HOLOGRAM DISPLAY APPARATUS AND METHOD FOR CONTROLLING THE SAME - Provided is a hologram display apparatus according to an exemplary embodiment of the present invention. The hologram display apparatus includes: a detector configured to detect a position of a viewer; and a spatial light modulation panel that modulates a light to display a hologram. Further, a grade is determined on the basis of the detected position of the viewer. An optical path switching unit refracts the light from the spatial light modulation panel with the determined grade. A laser source of the hologram display apparatus generates the light with a compensated output on the basis of the grade. | 06-30-2016 |
20160378062 | HOLOGRAM DATA GENERATING METHOD, HOLOGRAM IMAGE REPRODUCTION METHOD, AND HOLOGRAM IMAGE REPRODUCTION DEVICE - Hologram data is generated by dividing hologram data generation area, in which hologram data is generated, into a plurality of element sub-areas, computing base hologram data that pertains to an area smaller than the hologram data generation area and that is to form an optical wavefront of an image to be reconstructed, and assigning, as hologram data of the element sub-areas4, hologram data of an entirety or a part of the area to which the base hologram data pertains. Consequently, the amount of operations for generating a hologram pattern in holographic display is reduced. | 12-29-2016 |
20170235162 | TIME-VARYING METASURFACE STRUCTURE | 08-17-2017 |
20170235277 | METHOD AND APPARATUS FOR PROCESSING HOLOGRAPHIC IMAGE | 08-17-2017 |