Class / Patent application number | Description | Number of patent applications / Date published |
359030000 | Having optical element between object and recording medium | 19 |
20080239428 | NON-FT PLANE ANGULAR FILTERS - Non-Fourier Transform (FT) plane angular filters and their use in holographic storage systems or devices for angular filtering of a data beam prior to recording holographic data or for angular filtering of a recovered beam prior to detecting the recovered holographic data. The non-FT plane filters may be a macrotube array, an etalon, a multi-layer thin film interference coating on a curved surface, a lenslet array device, a waveguide-like array, or a combination thereof. Also provided are methods for carrying out angular filtering using such filters for data storage and/or data recovery. | 10-02-2008 |
20080252953 | Holographic Storage And Regeneration System Having Servo Mechanism - A holographic storage and regeneration system includes a holographic recording medium, a light source, a spatial light modulator, and a conjugate servo light guidance portion. The light source generates a signal light and a reference light. The spatial light modulator modulates the incident signal light and makes it incident onto the medium along the incident direction of the signal light. The guidance portion guides a reference light to incident onto the medium in one direction and reflects it in another direction. A reference light and a signal light interfere with each other to produce a holographic interference fringe. The reflected reference light is guided into a first image sensor to be used to analyze the incident angle of the reference light. When the reference light incidents onto the fringe of the medium through the guidance portion in a reverse direction relative to another direction, a conjugate regenerated light is generated. | 10-16-2008 |
20090051990 | Phase mask for holographic data storage - The present invention relates to a phase mask for holographic data storage, and to a method and an apparatus for reading from and/or writing to holographic storage media using such a phase mask. | 02-26-2009 |
20090103154 | RECORDING APPARATUS AND INFORMATION PROCESSING APPARATUS EQIUPPED WITH THE SAME - A recording apparatus includes a first light source irradiating first laser light, a second light source irradiating second laser light, an optical spatial modulating unit applying information to the first laser light, and an objective lens collecting the first laser light and the second laser light at different positions on the same optical axis. A hologram recording operation uses a first optical path and a second optical path. The information light is conducted to the objective lens along the first optical path. The reference light is conducted to the objective lens along the second optical path. At the same time, an address/servo control operation is carried out by employing a third optical path along which the second laser light is conducted to the objective lens. The DVD recording operation uses the second optical path. The CD recording operation uses the third optical path. | 04-23-2009 |
20090128876 | HOLOGRAM RECORDING DEVICE - A hologram recording device records holograms by interference between an recording beam and a reference beam. The device includes an objective lens exhibiting a predetermined aberration. It is supposed that the laser beam applied to the beam splitter has an light intensity of 1, the recording beam and the reference beam emitted from the beam splitter have light intensities of P and 1−P, respectively, the optical magnification for the recording beam traveling from the beam splitter to the objective lens is a, and N pixels are used for modulation of the recording beam in the spatial light modulator. When the recording beam at the predetermined region has an amplitude 1/k times the amplitude of the reference beam, and the amplitude of the recording beam is X times as great as when there is no aberration, the predetermined aberration of the objective lens is determined to satisfy the formula: | 05-21-2009 |
20090262408 | OPTICAL PICKUP APPARATUS AND HOLOGRAM RECORDING AND REPRODUCING SYSTEM - An optical pickup apparatus includes a light source for generating a coherent beam, a spatial light modulator having a central region arranged on an optical axis of the coherent beam and an annular region arranged in a manner surrounding the central region, to spatially separate a transmission component of the coherent beam through the central region and a transmission component through the annular region thereby producing a reference beam and a signal beam and propagating those coaxially in a same direction, an objective lens optical system arranged on the optical axis and for illuminating the signal beam and the reference beam coaxially toward the hologram record layer and causing the reference beam and the signal beam to focus on focal points different from each other, image detecting means arranged on the optical axis and for receiving a beam returning from the hologram record layer through the objective lens optical system when the reference beam is illuminated to the hologram record layer; and a polarization-plane rotating device having a central polarizing region arranged on the optical axis and an annular polarizing region arranged in a manner surrounding the central polarizing region and for making transmission components through the central and annular polarizing regions different in rotation angle on the polarization plane from each other. | 10-22-2009 |
20090284814 | SETUP FOR STORING DATA IN A HOLOGRAPHIC STORAGE MEDIUM AND PHASE PLATE - The present invention relates to a setup for storing data in a holographic storage medium, said setup comprising a spatial light modulator (SLM) ( | 11-19-2009 |
20100091349 | RECORDING AND REPRODUCING DEVICE AND POLARIZATION DIRECTION CONTROLLING METHOD - Disclosed herein is a recording and reproducing device including: a light source; an intensity modulating section; a polarization beam splitter; a selective polarization direction controlling section; a linearly polarized light/circularly polarized light converting section; and a driving controlling section. | 04-15-2010 |
20100103490 | Optical Information Recording Reproducing Apparatus - In the optical information recording reproducing apparatus that makes a reference light beam to interfere with an information light beam so as to record the information of the information light beam in a recording medium based on a two light beam interference method, or irradiates the reference light beam to a recording medium so as to emit a light beam and reproduces information stored in the recording medium by leading the light beam emitted from the recording medium an the image light receiving element, the optical information recording reproducing apparatus comprises a detector to detect positional deviation of at least one of the reference light beam and the information light beam from a predetermined optical path; and a correcting mechanism to correct the positional deviation based on an output from the detector. | 04-29-2010 |
20100245954 | Dual-Function Alignment Layer For Liquid Crystal Devices To Improve Degradation Resistance To Radiation - A liquid crystal alignment layer both offers a surface to which the liquid crystal molecules align, and maintains conductive properties required for the liquid crystal molecules to be manipulated by an applied electrical field. Advantages of the alignment layer offer reduced device degradation and improved stability under conventional or high intensity radiation, and also simplify the liquid crystal display or device construction. | 09-30-2010 |
20110043878 | DIGITAL HOLOGRAPHIC MICROSCOPY - An optical configuration for a digital holographic microscope and a method for digital holographic microscopy are presented. In one embodiment, digital off-axis holograms are obtained using a cube beam splitter ( | 02-24-2011 |
20130335796 | 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. | 12-19-2013 |
20140078566 | 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. | 03-20-2014 |
20160252880 | MICROSCOPE, METHOD AND COMPUTER PROGRAM FOR OBTAINING QUANTITATIVE PHASE IMAGES BY MEANS OF DIGITAL HOLOGRAPHIC MICROSCOPY | 09-01-2016 |
20220137279 | SIMPLIFIED GEOMETRY FOR FABRICATION OF POLARIZATION-BASED ELEMENTS - Disclosed are various methods for creating optical elements through holographic fabrication. One method includes positioning a reflector in an optical path, disposing a first substrate proximal to the reflector along the optical path, disposing a first photosensitive film on the side of the first substrate facing the reflector, transmitting a light beam at a first polarization from a light source along the optical path, reflecting the light beam off the reflector, wherein the reflected light beam has a second polarization, receiving the reflected light beam through the first film and the first substrate, and applying a liquid crystal layer to the first photosensitive film to reproduce the alignment pattern of the first film on the liquid crystal layer. | 05-05-2022 |
359031000 | Focused image holography | 4 |
20090153929 | APPARATUS FOR RECORDING/REPRODUCING HOLOGRAPHIC INFORMATION - A holographic information recording and/or reproducing apparatus, including a light source to emit light; a polarization forming optical system to form a polarized signal beam and a polarized reference beam from the light emitted from the light source, wherein the polarized signal beam and the polarized reference beam are incident on a holographic information storage medium through an identical surface; a focusing optical system to focus the polarized signal beam and the polarized reference beam onto in the holographic information storage medium so that information is recorded by an interference pattern; and an adjustment optical system to set the focal positions of the polarized signal beam and the polarized reference beam, and to adjust a difference between a path of the polarized signal beam and a path of the polarized reference beam. | 06-18-2009 |
20090174920 | APPARATUS FOR RECORDING/REPRODUCING HOLOGRAPHIC DATA - A holographic information recording and/or reproducing apparatus includes: a light source to emit light; a polarization conversion device to form a polarized signal beam and an orthogonal polarized reference beam; an optical path forming optical system to separate the optical paths of the signal beam and the reference beam; a focus adjustment optical system disposed on the optical path of at least one of the signal beam and the reference beam, and to vary a position of a focus of at least one of the signal beam and the reference beam in a depth direction of the holographic information storage medium; an objective lens to focus the signal beam and the reference beam in the holographic information storage medium, and form an interference pattern to record information; and a 4f relay system disposed on an optical path between the focus adjustment optical system and the objective lens. | 07-09-2009 |
20100245955 | LIGHT IRRADIATION DEVICE AND CONTROL METHOD - A light irradiation device includes: a focus servo control unit including a light source, a spatial light modulating unit, and a light irradiating unit, for focus servo control so that the ideal focal position of light via an objective lens is such that distance between an ideal focal position and a hologram recording medium surface is smaller than distance from the surface to the lower layer side face of the recording layer, and the focal position of light via the objective lens is constant at the ideal focal position; an objective-lens/relay-lens distance adjusting unit to adjust distance between the objective lens and a relay lens close to the objective lens; a light reception unit to receive marker light; and a constant distance control unit to control the objective-lens/relay-lens distance adjusting unit based on error between the ideal position of the marker light, and the actual position of the marker light. | 09-30-2010 |
20110279878 | Systems and Methods for Shear-Corrected Digital Hologram Acquisition - Systems and methods for shear-corrected digital hologram acquisition, wherein the shear-corrected geometry is highly suited for two (or more) color operation with either broadband or laser illumination. An apparatus for shear-corrected recording of a spatially heterodyne hologram with broad-band or laser illumination includes: an illumination source; a beamsplitter optically coupled to said illumination source(s); a reference beam corner-mirror pair for translation and phase-shaping of the object beam optically coupled to the beamsplitter; an object optically coupled to the beamsplitter; a focusing lens optically coupled to both the reference beam corner-mirror pair and the object; and a digital recorder optically coupled to the focusing lens. A reference beam is incident upon the translating and phase-shaping corner-mirror pair, and the reference beam and an object beam are focused by the focusing lens at a focal plane of the digital recorder to form a spatially heterodyne hologram. | 11-17-2011 |