Patent application number | Description | Published |
20100118381 | Light Modulation Device - A modulation device based on electrowetting cells (EW cells), phase or amplitude or both simultaneously as a complex value of incident light is modulated in each EW cell. An EW cell includes at least one chamber with at least two fluids which are separated by an interface, external and internal electrodes which form electrode pairs activatable by control means, where at least one electrode pair controls the level of the interfaces in the chamber. The internal, mutually functionally independent electrodes inside the chamber are disposed parallel to each other such that the chamber is divided into two communicating sections with two controllable interfaces, where at least one section is transparent and forms the optical path. When at least one electrode pair is activated, the interfaces are mutually displaced such that the path length of the pencils of rays is changed compared with an initial value. | 05-13-2010 |
20100194745 | Holographic Display Having Improved Reconstruction Quality - Disclosed is a display for the holographic reconstruction of a three-dimensional scene using means which allow a reduction of speckle patterns. Speckle patterns result in the graining of a holographic reconstruction and worsen the quality thereof. The 3D scene is incoherently superimposed with itself chronologically or spatially in the eye of the observer. The modulated wave fronts of each reconstructed object point of the scene are shifted relative to themselves in the reconstruction beam path and superimposed in the eye of the observer. The shifting may occur one-dimensionally and two-dimensionally. Each object point is multiplied with itself in the eye of the observer in accordance with the number of the shifted wave fronts. The various speckle patterns over which the eye of the observer averages are also multiplied. Speckle patterns are reduced and the reconstruction quality is thus increased in holographic displays. | 08-05-2010 |
20100194854 | Holographic Reconstruction System with an Arrangement of Controllable Microcells - A holographic reconstruction system is disclosed for the three-dimensional reconstruction of object light spots of a scene, comprising spatial light modulation means which modulate interference-capable light waves of illumination means with at least one video hologram, and optical focussing means which focus the modulated light waves with the reconstructed object light spots for at least one eye position of the observer's eyes. An electro-optical deflection means controlled by a system controller focuses the modulated light wave with the reconstructed object light spots on at least one eye position and tracks them when the eye position changes. The electro-optical deflection means is a controllable optical diffraction grating with a variable surface relief structure consisting of separately controllable microcells. | 08-05-2010 |
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 |
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 |
20100259804 | Illumination Unit Comprising an Optical Wave Guide and an Imaging Means - Disclosed is an illumination unit comprising a strip-type optical wave guide and an imaging means, and providing a very high light efficiency with a reduced number of primary light sources. The illumination unit enables the production of a coherent plane wave field having a temporal and spatial coherence required for holographic reconstructions. The strip-type optical wave guide contains extraction elements for extracting injected coherent light guided into an observer plane by imaging elements via a controllable light modulation means. During the injection of light, the extraction elements form a grid of secondary light sources which are arranged in the front focal plane of the imaging elements and carry out the spatial coherence in at least one dimension. A secondary light source and an imaging element are associated with each other in order to guide the extracted light through the controllable light modulation means in a collimated manner. | 10-14-2010 |
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 |
20100296148 | Spatial Light Modulator Using Electrowetting Cells - A spatial light modulator comprising pixels, where for each pixel, a light field amplitude transmitted by the pixel is modulated by an electrowetting cell and/or a light field phase transmitted by the pixel is modulated by an electrowetting cell. | 11-25-2010 |
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 |
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 |
20110235145 | OPTICAL COMPONENT FOR REFRACTING LIGHT RAYS PASSING THROUGH THE OPTICAL COMPONENT - An optical component deflects light beams which pass though the optical component. The optical component comprises multiple fluid cells arranged next to each other in a regular structure, and an influencing means, where a fluid cell contains at least two immiscible fluids, where an interface will form between two fluids of a fluid cell, where the interface can be given a specifiable shape and/or orientation by the influencing means, where a fluid cell comprises at least one optical medium, where the optical medium is disposed adjacent to a fluid of the fluid cell, where the shape of the surface of the optical medium which faces the adjacently arranged fluid cannot be changed, and where the optical medium serves to deflect the light beams which pass through the fluid cell by a specifiable angle. | 09-29-2011 |
20120092735 | THREE-DIMENSIONAL LIGHT MODULATION ARRANGEMENT FOR MODULATING A WAVE FIELD HAVING COMPLEX INFORMATION - The present invention relates to a three-dimensional light modulator, of which the pixels are combined to form modulation elements. Each modulation element can be coded with a preset discrete value such that three-dimensionally arranged object points can be holographically reconstructed. The light modulator according to the invention is characterized in that assigned to the pixels of the modulator are beam splitters or beam combiners which, for each modulation element, combine the light wave parts modulated by the pixels by means of refraction or diffraction on the output side to form a common light beam which exits the modulation element in a set propagation direction. | 04-19-2012 |
20120092750 | LIGHTING DEVICE FOR A DIRECT VIEWING DISPLAY - The present invention relates to a lighting device having a planer optical fiber and at least one light source device for illuminating a controllable spatial light modulator, wherein the optical fiber comprises a light-conducting core and a cover coating, and the light modulator comprises a pixel matrix, the light source device is disposed on the side of the optical fiber, and the light emitted by at least one light source of the light source device propagates laminarly in the optical fiber. The lighting unit according to the invention is characterized in that the planar optical fiber comprises a deflecting coating having a selective polarization function for laminarly decoupling and deflecting the evanescent wave field of the light propagating in the optical fiber, wherein the thickness of the cover coating reduces in the direction of light propagation. | 04-19-2012 |
20120206667 | LIGHT MODULATOR FOR A DISPLAY FOR DISPLAYING TWO-DIMENSIONAL AND/OR THREE-DIMENSIONAL IMAGE CONTENTS - A light modulator, for a display for the presentation of two- and/or three-dimensional image contents or image sequences, includes two opposing substrates and electrodes. At least one liquid crystal layer is provided between the two substrates. An alignment means is provided on the substrate which faces the liquid crystal layer to set a predeterminable pre-tilt of the liquid crystals. The orientation of the liquid crystals can be controlled in a given range through an electric field generated by the electrodes. The alignment means is controllable and can be controlled to modify the pre-tilt of the liquid crystals. The alignment can be controlled such the orientation of the liquid crystals can be oriented outside the given range or so that the pre-tilt of the liquid crystals can be set specifically for certain positions. | 08-16-2012 |
20130016410 | OPTICAL DEVICE FOR AN ILLUMINATION DEVICE OF A 3D DISPLAYAANM Futterer; GeraldAACI DresdenAACO DEAAGP Futterer; Gerald Dresden DE - An optical device for directing illuminating light at a pixel matrix and/or at a controllable spatial light modulator of a display, in particular of a stereoscopic or holographic 3D display comprises a multitude of reflection elements which work according to the principle of a concave mirror and which direct the illuminating light at the pixel matrix and/or at the controllable spatial light modulator of the display, and/or comprises at least one transmission element which is designed in the form of a holographic optical element, in particular in the form of a holographic volume grating, which directs the illuminating light at the pixel matrix and/or at the controllable spatial light modulator of the display. | 01-17-2013 |
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 |
20130188391 | OPTICAL ARRANGEMENT - The invention relates to an optical arrangement having a light source, which emits a beam, and having a light guide, which has a light-guiding layer, in which the coupled-in beam is guided between two substantially mutually opposite surface-type reflection layers. The optical arrangement is characterized in that the optical light paths of the individual rays of the beam, in particular at least of the marginal rays, from the light source to impingement on one of the reflection layers are substantially of equal length. | 07-25-2013 |
20130222384 | DISPLAY DEVICE, IN PARTICULAR A HEAD-MOUNTED DISPLAY, BASED ON TEMPORAL AND SPATIAL MULTIPLEXING OF HOLOGRAM TILES - The invention relates to a display device, in particular a head-mounted display or hocular, having a spatial light modulator and a controllable light-deflecting device for generating a multiple image of the spatial light modulator, which consists of segments, the multiple image being produced at least with a predefinable number of segments which determines the size of a visible area within which a 3D-scene holographically encoded in the spatial light modulator can be reconstructed for observation by an eye of an observer. | 08-29-2013 |
20140016051 | COMBINED LIGHT MODULATION DEVICE FOR TRACKING USERS - For comfortable viewing of a 3-D scene at various viewing angles, a display having a large tracking range for a variable viewer distance is required. A controllable light-influencing element deflects light in coarse steps in a viewer range. Within said steps, the light is deflected by a further controllable light-influencing element continuously or with fine gradation. The light modulation device is suitable in holographic or autostereoscopic displays for guiding the visibility ranges of the image information to be displayed so as to follow the eyes of the viewers. | 01-16-2014 |
20140055692 | LIGHT MODULATION DEVICE FOR A DISPLAY FOR REPRESENTING TWO- AND/OR THREE-DIMENSIONAL IMAGE CONTENT - The invention relates to a light modulation device for a display for representing two- and/or three-dimensional image content or image sequences. The light modulation device comprises a light modulator and a controller. The phase and/or the amplitude of a light wave field, which is substantially collimated, can be varied by means of the light modulator depending on the location of the light modulator. The light modulator can be actuated by means of the control device. According to the invention, in the direction of propagation of the light wave field, at least one diffracting unit is arranged downstream of the light modulator. The diffracting unit has a variable diffracting structure. By means of the diffracting structure, the light wave field varied by the light modulator can be diffracted in a variable and predeterminable manner. Further, the present invention relates to a display and a method for producing a light modulation device. | 02-27-2014 |
20140300709 | DISPLAY DEVICE AND METHOD FOR REPRESENTING A THREE-DIMENSIONAL SCENE - The invention relates to a display device for representing a three-dimensional scene, comprising a light source array, a lenticular system and a data display in this order, but not necessarily immediately following one another, and a corresponding method for representing a three-dimensional scene. The object thereof is to enlarge the observer region of a 3D display in such a way that this simultaneously provides a plurality of observers with the option of perceiving the 3D scene on the 3D display. This is achieved by an aforementioned display device with a multiplexing element, which follows the data display and can be used to distribute light incident from the data display into a plurality of angle segments, and by an aforementioned method, in which, in an additional step, a multiplexing element distributes the light coming from the data display in a plurality of angle segments. | 10-09-2014 |
20140327612 | MEASUREMENT METHOD AND DEVICE FOR PERFORMING THE MEASUREMENT METHOD - The present invention relates to a measurement method in which, by predetermined illumination by means of a display device, in particular a holographic or autostereoscopic display device, with an intensity distribution of the illumination light in a plane of a light source image, a first location of an object, in particular an observer of the display device, is marked, and wherein the relative position of the first location in relation to a second location of the object is determined in a coordinate system of a camera. | 11-06-2014 |
20140376207 | OPTICAL APPARATUS FOR ILLUMINATING A PIXEL MATRIX AND/OR A CONTROLLABLE SPATIAL LIGHT MODULATOR FOR A DISPLAY - The invention relates to optical device for illuminating a pixel matrix and/or a controllable spatial light modulator for a display, in particular a stereoscopic or holographic 3D display, wherein the optical device comprises a layer formed as a light waveguide, in which illumination light is guided in a light guiding layer, in particular according to the principle of total internal reflection, between two reflection layers lying opposite one another, wherein an extraction means for extracting illumination light from the light guiding layer is provided. The optical device is characterized in that the extraction means has different properties, in particular different optical properties, at a first extraction position than at another extraction position different to the first extraction position. | 12-25-2014 |