| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 359022000 | For producing or reconstructing images from multiple holograms (e.g., color, etc.) | 86 |
| 20080218818 | APPARATUS AND METHOD TO STORE INFORMATION IN A HOLOGRAPHIC DATA STORAGE MEDIUM - A method is disclosed to store information in a holographic data storage medium. The method supplies a holographic data storage medium comprising an encoded focusing hologram and one or more encoded data holograms. The method disposes the holographic data storage medium in a holographic data storage system such that a moveable imaging lens is disposed at an (i)th position. The method illuminates the encoded focusing hologram to generate an (i)th reconstructed focusing image, projects that (i)th reconstructed focusing image through the moveable imaging lens, and onto said optical detector. The method then calculates an (i)th measured focusing metric, and determines if the (i)th measured focusing metric is greater than or equal to the threshold focusing metric. If the (i)th measured focusing metric is greater than or equal to the threshold focusing metric, then the method decodes the one or more encoded data holograms. | 09-11-2008 |
| 20080218819 | PRINTING APPARATUS AND METHOD - In a printing apparatus, a recording material ejection nozzle is configured to eject a holographic recording material in dots onto a support, and a hologram recording optical system is configured to emit a plurality of beams of laser light simultaneously onto the holographic recording material ejected on the support by the recording material ejection nozzle to record interference fringes therein. A scanning drive unit is configured to move the recording material ejection nozzle and the hologram recording optical system relative to the support. | 09-11-2008 |
| 20080239426 | HOLOGRAPHIC STORAGE MEDIUM, RECORDING AND/OR REPRODUCING APPARATUS, AND RECORDING AND/OR REPRODUCING METHOD - A holographic storage medium includes a hologram including data recorded in a plurality of pages in a superimposed fashion by interference of a signal beam and a reference beam, and an additional page recorded between two adjacent pages in the plurality of pages, wherein a portion of the data is recorded to a region of the additional page having a relatively small selectivity compared to other regions of the additional page without recording on the other regions. | 10-02-2008 |
| 20080239427 | Multiplexing hologram recording and reconstructing apparatus and method therefor - A hologram recording and reconstructing apparatus includes a rotating mirror, a rectangular aperture and a medium drive unit, records interference fringes of a reference beam and a signal beam in a hologram recording medium and reconstructs the hologram recorded in the hologram recording medium. The rotating mirror changes the angle of incidence of the reference beam incident on the hologram recording medium such that multiple data is recorded in the same recording region of the hologram recording medium. The rectangular aperture blocks a reconstructed beam from a hologram adjacent to the hologram to be reconstructed. The medium drive unit drives the hologram recording medium such that the angle of incidence of the signal beam and the reference beam incident on the hologram recording medium is changed. | 10-02-2008 |
| 20080252951 | Reference beam coupler for an apparatus for reading from and/or writing to holographic storage media - The present invention relates to a reference beam coupler for an apparatus for reading from and/or writing to holographic storage media, to a multiplexing scheme using the reference beam coupler, and to an apparatus for reading from and/or writing to holographic storage media using such reference beam coupler or multiplexing scheme. | 10-16-2008 |
| 20080285100 | Apparatus and Method for Producing a Hologram - The present invention relates to a method and apparatus for producing a hologram, in particular a dot matrix volume hologram. A holographic recording system ( | 11-20-2008 |
| 20090002788 | VERIFICATION OF DATA STORAGE HOLOGRAMS - A holographic storage drive of a holographic data storage system is configured to write and read holograms with respect to a plurality of locations of a holographic storage medium; and a control is configured to operate the holographic storage drive to write a known image aggregated with data in the form of a hologram to the holographic storage medium; to operate the holographic storage drive to read back the written hologram, employing a partial matched filter to cross-correlate the read-back image with the ideal version of the known image, excluding the remainder of the written hologram; and to determine whether the cross-correlation at least meets a write/readback threshold. | 01-01-2009 |
| 20090002789 | Interferometer - The interferometer of the invention comprises a moving mirror | 01-01-2009 |
| 20090059329 | HOLOGRAM READING APPARATUS, HOLOGRAM READING METHOD, HOLOGRAM RECORDING APPARATUS AND HOLOGRAM RECORDING METHOD - A hologram reading apparatus includes: a unit for holding a hologram recording medium in which data page is recorded by irradiating as a single beam both reference light and signal light modulated by a spatial light modulator including a first pixel area for modulating the reference light and a second pixel area for modulating the signal light, a direction of an arrangement period of pixels in the first pixel area being different from that in the second pixel area; a Fourier transform lens subjecting reproduction light to a Fourier transformation; a filter disposed shielding the reference light at a first spatial frequency band and transmitting the signal light at a second spatial frequency band; and a unit for receiving the reproduction light and reading the data page modulated to the signal light included in the reproduction light. | 03-05-2009 |
| 20090073522 | System and Methods for Shearless Hologram Acquisition - Systems and methods for shearless digital hologram acquisition, including an apparatus incorporating an illumination source configured to produce a first beam of light, which is then split by a beamsplitter into a reference beam and an object illumination beam. The reference beam is directed onto a phase-shaping optical element which imparts a phase shift to the reference beam and returns the phase-shifted reference beam on itself to the beamsplitter. The object illumination beam is directed onto an object, and a portion of the beam is reflected back to the beamsplitter, which combines the phase-shifted reference beam and object illumination beam substantially coaxially. The combined beams are passed through a focusing lens which focuses them at a focal plane. A digital recorder is positioned at the focal plane to record the spatially heterodyne hologram formed by the focused phase-shifted reference beam and reflected object illumination beam. | 03-19-2009 |
| 20090109511 | HOLOGRAM RECONSTRUCTING APPARATUS - Light emitted from a light source and passes through a collimating lens forms a parallel beam, which is reflected by a reflecting surface of a movable mirror. The parallel beam is made incident on a recording medium at a certain incident angle. The reconstructed light beam generated by Bragg diffraction caused by a hologram recorded in the recording medium is output at a certain output angle. The output reconstructed light beam is received by a flat photosensor, and information recorded in the form of a hologram is read out. By changing the angle of the movable mirror in at least two directions, the incident angle can be changed, and a hologram recorded in an angle multiplexed manner can be reconstructed. By changing the incident angle in a direction perpendicular to the displacement direction, an incident angle of a reconstruction reference light beam made incident on a hologram region is controlled. | 04-30-2009 |
| 20090116086 | HOLOGRAM RECORDING DEVICE AND HOLOGRAM RECORDING METHOD - A hologram recording device for irradiating a recording beam (S) to a hologram recording medium (B) at a fixed incident angle (θs) and irradiating a reference beam (R) to an illuminated region (p) of the recording beam (S) by variably controlling an incident angle (θr) of the reference beam (R) on the hologram recording medium (B), whereby a hologram is recorded on the illuminated region (p) in multiple, includes at least a variable reflector ( | 05-07-2009 |
| 20090128874 | HOLOGRAM RECORDING DEVICE - A hologram recording device (A | 05-21-2009 |
| 20090135459 | HOLOGRAM RECORDING APPARATUS AND HOLOGRAM RECORDING/REPRODUCING METHOD - A hologram recorder applies a recording beam (S) and a reference beam (R) to the illumination site (p) of a hologram recording medium (B). The interference between the recording beam (S) and the reference beam (R) produces multiple hologram recording at the illumination site (p). The recorder includes a recording-purpose reference beam reflector ( | 05-28-2009 |
| 20090147333 | HOLOGRAM MEDIUM MANUFACTURING METHOD, MASTER HOLOGRAM MEDIUM MANUFACTURING METHOD, RECORDING MEDIUM, AND HOLOGRAM MEDIUM MANUFACTURING APPARATUS - A hologram medium manufacturing method is disclosed. The hologram medium manufacturing method includes: disposing a first pair of master hologram media with a predetermined interval so that the first pair of the master hologram media face each other; forming a master hologram in the master hologram media by irradiating the first pair of the master hologram media with spherical wave light and reference light so that the spherical wave light and the reference light interfere with each other in the master hologram media, the spherical wave light and the reference light having a focal point between the first pair of the master hologram media; disposing a hologram medium between the first pair of the master hologram media; and forming a hologram in the hologram medium by irradiating the first pair of the master hologram media with the reference light. | 06-11-2009 |
| 20090219594 | HOLOGRAM REPRODUCING DEVICE AND HOLOGRAM REPRODUCING METHOD - Disclosed is a hologram reproducing device and a hologram reproducing method capable of reading hologram data at a high speed with low power consumption. When a predetermined voltage is applied to some of the signal electrodes and the scanning electrodes arranged in a matrix, a pixel disposed at an intersection of the signal electrode and the scanning electrode is set as a transmission region, and reproduction light emitted from a hologram recording medium passes through a light control member through the transmission region and is then incident on a light receiving unit. Then, hologram data is reproduced. It is possible to switch the reproduction light passing through the light control member only by changing a combination of voltages applied to the signal electrode and the scanning electrode. Therefore, it is possible to improve the read speed of hologram data. | 09-03-2009 |
| 20090244667 | HOLOGRAPHIC MICROSCOPE - The preferred embodiments of the present invention include a holography attachment device that is attachable to a digital imaging device to form a holographic microscope. The holography attachment device includes a chamber having at least one attachment mechanism to facilitate attachment of the chamber to a digital imaging device. The holography attachment device also includes a light source and a sample holder section, which is located between a proximate end and the distal end of the chamber. The light source is configured to radiate light within the chamber. The light passes through the sample holder section and impinges on an imaging sensor of a digital imaging device when the chamber is attached to the digital imaging device. The digital imaging device is capable of recording hologram information related to a sample held by the sample holder in the sample holder section. | 10-01-2009 |
| 20090279152 | HOLOGRAM RECORDER - A hologram recording apparatus includes an objective lens ( | 11-12-2009 |
| 20090279153 | HOLOGRAM RECORDING/REPRODUCING DEVICE, HOLOGRAM RECORDING/REPRODUCING METHOD, AND HOLOGRAM RECORDING MEDIUM - The hologram recording/reproducing apparatus is for recording a hologram by emitting a recording beam (S) modulated by a spatial light modulator and a reference beam (R) having a same wavelength as the recording beam onto a hologram recording medium (B) so that the beams overlap each other with polarization direction (p) of the beams being matched to interfere with each other, and for reproducing the hologram by exposing the hologram recording medium storing the hologram to the reference beam to generate diffracted light and receiving the diffracted light by an imaging device. The spatial light modulator is controlled so as to form a data area (H | 11-12-2009 |
| 20100014137 | Holographic multiplex recording method, and holographic recording apparatus and holographic recording medium employing the method - A holographic multiplex recording method which can keep a recording data rate constant and equalize nonuniformity in recording due to vibrations or the like, and a holographic recording apparatus and a holographic recording medium, which employ the method. In a process of multiplex-recording information, the time of exposure to a laser beam per data page is kept constant, and the laser output power of the laser beam is increased in accordance with a decrease in recording sensitivity of the holographic recording medium. | 01-21-2010 |
| 20100014138 | High Areal Density Holographic Data Storage System - An apparatus for recording or reading high areal density holographically stored information with high signal-to-noise ratio. The apparatus comprises a holographic imaging system for recording or reconstructing a holographic image, having a first numerical aperture and a first focal length and an additional optical system for filtering the signal beam, having a second numerical aperture and a second focal length, wherein the numerical aperture of the additional optical system is less than the numerical aperture of the holographic imaging system and/or the focal length of the additional optical system is greater than the optical length of the holographic imaging system. | 01-21-2010 |
| 20100020375 | METHOD OF RECORDING HOLOGRAPHIC INFORMATION - A method of recording holographic information includes recording a hologram mark and a homogeneous mark in a holographic data storage medium with a volume to alternatively locate the hologram mark and the homogeneous mark. The hologram mark has a varied refractive index distribution due to constructive/destructive interferences between two light beams and indicates information, while the homogeneous mark has a more uniform refractive index distribution than the hologram mark. | 01-28-2010 |
| 20100027086 | LIGHT DEFLECTING DEVICE AND HOLOGRAM DEVICE - A light deflecting device is a light deflecting device for deflecting an incident light beam and has: a coarse motion light deflecting device which has an optical system having at least two conjugate points on an optical axis and deflects the light beam which has passed through one conjugate point and has entered the optical system as an output light beam which passes through the other conjugate point and has a deflection angle with respect to the optical axis while changing its transmitting direction; and a fine motion light deflecting device which is arranged in the optical system, applies a deflection to the incident light beam, and changes the deflection angle of the output light beam to a second deflection angle different from the deflection angle for a predetermined time. | 02-04-2010 |
| 20100067077 | Holographic Reconstruction System with Optical Wave Tracking Means - A holographic projection system has an optical wave tracking system which adjusts the propagation direction of a modulated wavefront. It provides an adjustable wave tracking system which aligns the modulated wave with a desired eye position of one or more observers and follows the movements of the observer. The system comprises spatial light modulation means which modulate a wave with holographic information for the purpose of holographic reconstruction. The optical wave tracking provides the light path of the modulated wave with a desired propagation direction which guides the modulated wave out of the reconstruction system via a light exit position of a display screen. Position control means set adjustable tracking mirror means in terms of their inclination to a reflection direction for reflecting the modulated wave and deflection means, which are located in the set reflection direction, reflect the wave via the display screen into the desired propagation direction. | 03-18-2010 |
| 20100172003 | HOLOGRAM APPARATUS AND RECORDING AND REPRODUCING METHOD OF THE SAME - A hologram apparatus which comprises a light generating unit that generates coherent reference light and coherent signal light modulated according to information to be recorded; an interference optical system that irradiates the signal light and the reference light toward the record medium to intersect therein, thus forming a diffraction grating inside the record medium by an optical interference pattern; and a photodetector that detects reproduced light. The hologram apparatus further comprises a second interference optical system that irradiates second signal light and second reference light to intersect inside the record medium, wherein the second signal light and the second reference light are placed in the plane of incidence including the signal light and the reference light of the interference optical system so as to be opposite to the signal light and the reference light with the record medium sandwiched in between; and a second photodetector that detects reproduced light. | 07-08-2010 |
| 20100182664 | HOLOGRAM RECORDER - A hologram recorder includes a signal beam irradiator to irradiate a signal beam, which is optically modulated in accordance with information to be recorded, to a recording medium at a predetermined incident angle. The hologram recorder also includes a recording prism provided with surfaces including an incident surface, a reflective surface and an emission surface for light so that a recording reference beam is guided to the recording medium by way of these surfaces. A pivot mechanism of the hologram recorder causes the recording prism to pivot above the recording medium for changing the incident angle of the recording reference beam at the recording medium, with the recording reference beam kept to overlap the signal beam. | 07-22-2010 |
| 20100195179 | HOLOGRAM REPRODUCING DEVICE AND HOLOGRAM REPRODUCING METHOD - A hologram reproducing device includes a splitter for splitting a reference beam, during reproduction, into a main beam and sub-beams forming incidence directions spatially shifted from the main beam. The hologram reproducing device also includes: an incidence direction variable irradiator for changing the incidence directions of the main beam and the sub-beams; a servo beam detector for detecting a portion of the reproduction beam generated in accordance with the sub-beams; and a beam receiving unit for receiving the main portion of the reproduction beam generated in accordance with the main beam. A reproducer reproduces an image obtained by the beam receiving unit when the main beam coincides with the incidence direction at which the received light of the beam receiving unit becomes equal to or greater than a prescribed level, with the intensity of the reference beam kept uniform, on the basis of the servo beam detection results. | 08-05-2010 |
| 20100259803 | COLLINEAR VOLUME HOLOGRAPHIC OPTICAL STORAGE SYSTEM AND INFORMATION STORAGE STRUCTURE THEREOF - A collinear volume holographic optical storage system records a plurality pages of holographic data on the storage material, where the intensity distribution of the saved recorded holographic data of each page is in a “+” format. It is possible to incur the inter-page cross talk between two adjacent pages of holographic data along the storage track or between two adjacent storage tracks. An rotation angle between the direction of the distribution of the volume grating and the direction of the storage track can be used to increase the descendent of data storage intensity along storage track, so the effect of the inter-page cross talk is decreased; or the distance between reading centers of two pages of holographic data is shorten to increase the storage density of the storage material. | 10-14-2010 |
| 20110002020 | THREE DIMENSIONAL HOLOGRAPHIC VOLUMETRIC DISPLAY - The invention comprises a pattern generation unit ( | 01-06-2011 |
| 20110043877 | THREE-DIMENSIONAL IMAGE PROJECTOR - An object of the present invention is to display a highly reproducible three-dimensional image in response to changes in the viewer's position and to easily realize the miniaturization of the system. The three-dimensional image projector | 02-24-2011 |
| 20110109949 | PRINTER REGISTER HOLOGRAPHIC IMAGES - A method of creating a substrate containing multiple holographic images. The method includes dividing the substrate into a plurality of equally sized print surfaces and placing a holographic image on each of the print surfaces. Wherein the holographic image is placed at substantially the same location on each of the print surfaces. | 05-12-2011 |
| 20110261427 | SYSTEM AND METHOD FOR COLOR MOTION HOLOGRAPHY - A method for producing and replaying a composite color hologram, the method comprising recording a first hologram containing primarily a green content of an intended composite hologram using a substantially collimated recording reference beam, recording a second hologram containing primarily a blue content of the intended composite hologram using a substantially collimated recording reference beam, recording a third hologram containing primarily a red content of the intended composite hologram, transmitting, using a first filter, at least a portion of wavelengths close to Ar at a broad range of angles about an intended viewing angle of the intended composite hologram, blocking, using the first filter, at least a portion of wavelengths close to Ar at angles close to Or, transmitting, using the first filter, at least a portion of wavelengths close to Ab only at angles close to Ob and/or Ag only at angles close to Og | 10-27-2011 |
| 20110286065 | INTERACTIVE ZOETROPE FOR ANIMATION OF SOLID FIGURINES AND HOLOGRAPHIC PROJECTIONS - A zoetrope configured for user interaction. The zoetrope includes an object support that pivotally supports a holographic disc or other projection element containing a plurality of images. A positioning mechanism rotates the holographic disc at a predetermined speed or positions the projection element in numerous positions. The disc or projection element is illuminated by an illumination source in such a manner as to selectively make the images contained therein be projected in a sequence that provides a projected object that may be animated in an interactive manner based on user input such as voice input. The zoetrope may read out holographic images in response to a user's voice input to project a 3D object that appears to be speaking the words or song input by the user such as by illuminating the disc once per revolution in a particular angular orientation associated with a desired one of the holographic images. | 11-24-2011 |
| 20120002257 | HOLOGRAM RECORDING MEDIUM AND METHOD FOR MANUFACTURING THE SAME, HOLOGRAM REPRODUCTION APPARATUS, AND HOLOGRAM REPRODUCTION METHOD - A hologram recording medium having two or more images recorded therein, wherein when substantially collimated light is incident along a first direction on the hologram recording medium, a first image is reproduced with the intensity of light diffracted in the hologram recording medium maximized in a predetermined direction, when substantially collimated light is incident along a second direction on the hologram recording medium, a second image is reproduced with the intensity of light diffracted in the hologram recording medium maximized in the predetermined direction, and a full width at half maximum of a reproduction angle of at least either of the diffracted light intensities of the first and second images is 8° or smaller. | 01-05-2012 |
| 20120092737 | METHOD OF FORMING AN IMAGING DEVICE - A method, apparatus, and system that provides a holographic layer as a micro-lens array and/or a color filter array in an imager. The method of writing the holographic layer results in overlapping areas in the hologram for corresponding adjacent pixels in the imager which increases collection of light at the pixels, thereby increasing quantum efficiency. | 04-19-2012 |
| 20120250123 | APPARATUS AND METHOD FOR EVALUATING HOLOGRAM IMAGE RECORDING MEDIUM - A method for evaluating a hologram image recording medium includes: recording continuously a plurality of fine holograms, each being the same in size as an element hologram, on a hologram image recording medium to be evaluated, using either one of a two-beam interference between a reference beam and a signal beam both being a plane wave and a two-beam interference between a reference beam being a plane wave and a signal beam being a spherical wave; reproducing a diffraction image by irradiating the recorded fine hologram with a plane wave; from intensity distribution data based on a captured diffraction image, determining an intensity distribution data array and a diffracted beam intensity I | 10-04-2012 |
| 20130063796 | Arrayed coherent wavefront expansion device for pulsed reflection holography - An apparatus for the recording and multiplexing of pulsed reflection holograms made possible with the invention of the Hollow Core Photonic Crystal Fiber is disclosed herein. This holographic imaging apparatus uses the Hollow Core Photonic Crystal Fiber as a waveguide in which the highly coherent property of the lightwave required for recording interference fringes can propagate through this waveguide without this coherency of the lightwave diminishing. This apparatus enables the multiplexing of several reflection holograms in a single recording medium using the reference beam with several object beams in sequenced intervals of time and space; several multiplexed recordings are made within a brief interval in time with the object beam-emanating from incremental points in space; around a 120 degree tangential arc in space to achieve parallax around this 120 degree tangential arc. This disclosure makes possible apparatus which is transportable and shoulder mountable for pulsed reflection holography. | 03-14-2013 |
| 20130077141 | OPTICAL DEVICE AND VIRTUAL IMAGE DISPLAY - An optical device includes: a light guide plate receiving, for each of N types of wavelength bands, a plurality of parallel light beams with different incident angles each corresponding to view angles, and guiding the received parallel light beams; a first and a second volume hologram gratings of reflection type having a diffraction configuration which includes N types of interference fringes each corresponding to the N types of wavelength bands, and diffracting/reflecting the parallel light beams. The optical device satisfies for each wavelength band, a relationship of ‘P>L’, where ‘L’ represents a central diffraction wavelength in the first and second volume hologram gratings, defined for a parallel light beam corresponding to a central view angle, and ‘P’ represents a peak wavelength of the parallel light beams. | 03-28-2013 |
| 20130128327 | OPTICAL INFORMATION RECORDING/ REPRODUCING APPARATUS, OPTICAL INFORMATION RECORDING/ REPRODUCING METHOD, AND OPTICAL INFORMATION RECORDING MEDIUM - In an optical information recording/reproducing apparatus using holography, there are provided the optical information recording/reproducing apparatus, method thereof, and optical information recording medium which correct a zero point and variation of unit quantity of a reference beam angle between apparatus and perform recording or reproducing operation with high compatibility between apparatus. The optical information recording/reproducing apparatus detects a reference beam angle suitable to reproduce angle correction data recorded on the optical information recording medium and corrects a zero point and unit quantity of the reference beam angle at the time of recording or reproducing operation based on the detection angle information. | 05-23-2013 |
| 20130148182 | SPECKLE NOISE REDUCTION BASED ON LONGITUDINAL SHIFT OF SAMPLE - A method and apparatus for reducing speckle noise in an image of an object are disclosed. The method includes, placing the object in an interferometer at a first position along a beam path of an object beam, irradiating the object with the object beam, moving the object from the first position to a second position by longitudinally shifting the object along the beam path of the object beam, irradiating the object with the object beam at the second position. At each of the first and second positions a holographic image formed by interference between the object beam and a reference beam is recorded. An object image with reduced speckle noise is obtained by averaging the holographic images. Either an arithmetic mean or a weighted average may be used in the averaging of the holographic images. | 06-13-2013 |
| 20130278982 | Device and Method for Holographic Reflection Imaging - A holographic imaging device for imaging an object under study includes a partially reflective surface having a contact side for contacting the object under study and an imaging side for partially reflecting a radiation wave. The device also includes at least one radiation source for projecting the radiation wave onto the imaging side of the partially reflective surface and an image sensor arranged to receive the radiation wave when reflected by the partially reflective surface. The image sensor is adapted for determining an interference pattern between the radiation wave reflected by the imaging side of the partially reflective surface and the radiation wave reflected by the object under study when contacting the contact side of the partially reflective surface. | 10-24-2013 |
| 20130301092 | Hybrid Reflection Hologram - Hybrid white-light viewable holograms and methods for making them. The holograms are hybrid reflection holograms made using the diffractive structures or gratings of a holographic object such as a transmission hologram or holographic optical element (HOE). The wavefronts of the diffractive structures are converted into a reflection hologram by scanning them with a coherent light source having a profiled narrow beam. The hybrid reflection hologram can exhibit display parameters including the multiple colors, solidity, and color stability of white light reflection holograms, the diffractive color shifting of a white light transmission hologram, three dimensional imaging and a wide variety of dynamic changes. Different areas or images with each of these effects can be combined in a single hologram. These hybrid reflection holograms are ideal for security and forgery prevention applications. | 11-14-2013 |
| 20130301093 | DIGITAL HOLOGRAPHY DEVICE AND IMAGE GENERATION METHOD USING DIGITAL HOLOGRAPHY - A digital holography device ( | 11-14-2013 |
| 20140092457 | BACK LIGHT UNIT PROVIDING DIRECTION CONTROLLABLE COLLIMATED LIGHT BEAM AND 3D DISPLAY USING THE SAME - The present disclosure relates to a back light unit providing direction controllable collimated light beam and a three-dimensional display using the same. The present disclosure suggests a back light unit comprising: a light source for generating light; and a light direction controller for converting the light from the light source into a direction controlled collimated light beam having a refraction angle, the direction controlled collimated light beam emitted to a predetermined area to generate a three-dimensional holographic image. The back light unit according to the present disclosure can provide direction controllable collimation light having uniform brightness distribution over a large diagonal area of the spatial light modulator with thin and simple structure. | 04-03-2014 |
| 20140118807 | HOLOGRAPHIC RECONSTRUCTING DEVICE AND APPLICATION ADAPTED TO PORTABLE ELECTRONIC PRODUCTS - Disclosed are a holographic reconstructing device and its application for portable electronic products. The holographic reconstructing device includes a compound hologram ( | 05-01-2014 |
| 20140198363 | METHOD FOR GENERATING A POINT LIGHT SOURCE IN A PLANE AT AN ARBITRARY LOCATION USING A DYNAMIC HOLOGRAM - This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for providing a display device. In one aspect, the display device may include a light source system, a programmable hologram system, a light-turning layer and a control system. A control system may control the programmable hologram system to generate a sequence of holographic images of point light sources. The control system may control the programmable hologram system according to software stored in a non-transitory medium. By scanning a sequence of holographic images of point light sources across the light-turning layer, a frame of image data can be reproduced on the display device. | 07-17-2014 |
| 20140285863 | METHOD AND APPARATUS FOR HOLOGRAPHIC RECORDING - Provided is a holographic recording method in which an interference fringe between a reference beam and a signal beam, modulated according to information regarding a plurality of hologram pixels, is recorded on a holographic recording medium, the holographic recording method including multiplexing-recording the interference fringe of the plurality of hologram pixels such that at least a part of the interference fringe recorded of neighboring hologram pixels of the plurality of hologram pixels is overlapped. | 09-25-2014 |
| 20150062675 | DYNAMIC APERTURE HOLOGRAPHY - Methods and systems for performing dynamic aperture holography are described. Embodiments include a method of recording multiple holograms in a photosensitive recording medium, wherein multiple signal beam angular apertures used to record the multiple holograms differ from each other. The multiple signal beam angular apertures can facilitate using a larger range of reference beam angular apertures. The multiple holograms are typically multiplexed, and embodiments of dynamic aperture holography enable packing the multiplexed holograms more densely in the recording medium. Embodiments include dynamic aperture holography systems having monocular objective lens architecture. | 03-05-2015 |
| 20160004221 | METHODS AND APPARATUS FOR COHERENT HOLOGRAPHIC DATA CHANNELS - Methods and devices for coherent holographic data channel techniques are presented. Coherent techniques for data detection generally include homodyne and heterodyne detection. Techniques for quadrature homodyne detection, resampling quadrature homodyne detection, n-rature homodyne detection, and spatial wavefront demodulation are presented. Coherent detection techniques in turn enable coherent channel modulation techniques such as phase modulation (including binary phase shift keying, or BPSK; phase quadrature holographic multiplexing, or QPSK; and quadrature amplitude modulation, or QAM). Coherent detection may also enable or improve the performance of other channel techniques such as partial response maximum likelihood (PRML), the various classes of extended PRML, and of noise-predictive maximum likelihood (NPML) detection. | 01-07-2016 |
| 20180024497 | SYSTEMS AND METHODS FOR FABRICATING VARIABLE DIGITAL OPTICAL IMAGES USING GENERIC OPTICAL MATRICES | 01-25-2018 |
| 359023000 | Holographic stereogram | 20 |
| 20080198430 | Method and Device for Encoding and Reconstructing Computer-Generated Video Holograms - A method and a device for encoding and reconstructing computer-generated video holograms using a conventional LC display: it provides holographic reconstruction of three-dimensional scenes using electronically controllable pixel in a holographic array ( | 08-21-2008 |
| 20080231926 | Systems and Methods for Updating Dynamic Three-Dimensional Displays with User Input - A dynamic three-dimensional image can be modified in response to poses or gestures, such as hand gestures, from a user. In one implementation, the gestures are made by a user who selects objects in the three-dimensional image. The gestures can include indications such as pointing at a displayed object, for example, or placing a hand into the volume of space occupied by the three-dimensional image to grab one or more of the displayed objects. In response to the gestures, the three-dimensional display is partially or completely redrawn, for example by an alteration or repositioning of the selected objects. In one implementation, a system simulates the dragging of a displayed three-dimensional object by a user who grabs and moves that object. | 09-25-2008 |
| 20080252952 | Method and Apparatus for Recording One-Step, Full-Color, Full-Parallax, Holographic Stereograms - The present invention concerns methods and devices for creating and printing variable size and variable resolution holographic stereograms and holographic optical elements using computer rendered images of three-dimensional computer models or using computer processed images. The present invention is an apparatus and method for printing one-step, full-color, full-parallax holographic stereograms utilizing a reference beam-steering system that allows a reference beam to expose a holographic recording material from different angles. More particularly, a coherent beam is split into object and reference beams. The object beam passes through an object beam unit in which a rendered image is displayed, while the reference beam passes through the reference beam-steering system. The object and reference beams interfere with each other at an elemental hologram on a holographic recording material. A computer controls the exposure time and the movement of the recording material and may also render the images displayed in the object beam unit. In addition, the computer may also store the images before they are displayed in the object beam unit. Also, the present invention may also utilize a voxel-control lens placed in the path of the object beam and in close proximity to the holographic recording material to control the resolution of a holographic stereogram. In addition, the present invention may also utilize interchangable band-limited diffusers and reference-beam masking plates. Furthermore, the present invention incorporates viewing zone techniques to the rendering process for one-step, holographic stereograms to produce animated, one-step, holographic stereograms. | 10-16-2008 |
| 20090116087 | IMAGE RECORDING METHOD, IMAGE RECORDING APPARATUS, AND IMAGE RECORDING MEDIUM - An image recording method of recording a holographic stereogram is disclosed. An optical deflecting device is disposed in proximity to a hologram record medium when it is exposed with a stripe-shaped elemental hologram. Either object beam or reference beam is deflected in a long side direction thereof through the optical deflecting device to expose the hologram record medium. The hologram record medium is multiply exposed at least two times with different deflection angles of the optical deflecting device to cause the elemental hologram to have a plurality of parallaxes in a long side direction of the elemental hologram. | 05-07-2009 |
| 20090174919 | Directed illumination diffraction optics auto-stereo display - A display device includes a surface configured to be illuminated by at least two directed light beams, and one or more holographic optical elements. The surface is configured and disposed with respect to the holographic optical element to display an autostereo image that is illuminated by the directed light beams wherein the holographic element diffracts the directed light beams to form separate stereo viewing areas. The surface and the holographic optical element may be configured and oriented with respect to each other to enable the directed light beams to be alternately switched in synchronization with left and right stereo images presented on the surface to yield an autostereo view to one or more observers. | 07-09-2009 |
| 20090237763 | User Interaction with Holographic Images - User input is facilitated through gestural inputs with displayed two and three-dimensional objects using a holographic device and film that displays a static, digitally generated, three-dimensional, autostereoscopic, full-parallax, real image and a digital projector that displays dynamic images. A system includes computer-detectable tags mounted on a user-wearable glove, and on a base plate that holds the holographic device. The system determines the locations of the tags, and calculates a location of a feature of the image based on the locations of the tags. The system also determines the location, pose, and gestural motion of the input device based on the location of the tags. The system further calculates a distance and direction between the input device and the feature of the image. | 09-24-2009 |
| 20110007375 | Method and Apparatus for Recording One-Step, Full-Color, Full-Parallax, Holographic Stereograms - The present invention concerns methods and devices for creating and printing variable size and variable resolution holographic stereograms and holographic optical elements using computer rendered images of three-dimensional computer models or using computer processed images. The present invention is an apparatus and method for printing one-step, full-color, full-parallax holographic stereograms utilizing a reference beam-steering system that allows a reference beam to expose a holographic recording material from different angles. More particularly, a coherent beam is split into object and reference beams. The object beam passes through an object beam unit in which a rendered image is displayed, while the reference beam passes through the reference beam-steering system. The object and reference beams interfere with each other at an elemental hologram on a holographic recording material. A computer controls the exposure time and the movement of the recording material and may also render the images displayed in the object beam unit. In addition, the computer may also store the images before they are displayed in the object beam unit. Also, the present invention may also utilize a voxel-control lens placed in the path of the object beam and in close proximity to the holographic recording material to control the resolution of a holographic stereogram. In addition, the present invention may also utilize interchangable band-limited diffusers and reference-beam masking plates. Furthermore, the present invention incorporates viewing zone techniques to the rendering process for one-step, holographic stereograms to produce animated, one-step, holographic stereograms. | 01-13-2011 |
| 20110032587 | System and Method for Autostereoscopic Imaging - Systems and methods for autostereoscopic display of three-dimensional images include a holographic optical element made by preparing a silver halide gelatin emulsion, coating one side of a glass substrate with the emulsion, holographically recording an eyebox on the coated glass substrate using at least three wavelengths of coherent light combined in a source beam that is divided into a reference beam and object beam with at least one of the reference and object beam passing through a beam shaping device to substantially uniformly illuminate the glass substrate from opposite sides, processing the coated glass substrate, and sealing the coated glass substrate by covering the coated side of the glass substrate with an optical cement and securing to a black glass plate. The element may be mounted in a display and illuminated with at least one projector having optical keystone correction with source wavelengths aligned or matched with the recording wavelengths. | 02-10-2011 |
| 20110058240 | System and Method for Autostereoscopic Imaging Using Holographic Optical Element - Systems and methods for creating an autostereoscopic display include a holographic optical element (HOE) recorded using coherent light divided into diverging reference and object beams that illuminate the HOE from opposite sides. The object beam passes through first and second diffusers with one diffuser being a directional diffuser to more uniformly illuminate the HOE. Optic elements may be used to more closely match beam diameters and/or profiles of the recording wavelengths. Baffles may be positioned on opposite sides of the HOE with openings aligned proximate the reference beam and object beam paths, respectively, to reduce stray reflections and provide ambient air flow attenuation or damping. One or more edges of the HOE are masked to reduce or prevent stray light from entering and reflecting within the HOE during recording. | 03-10-2011 |
| 20120188622 | HOLOGRAM RECORDING APPARATUS - A hologram recording apparatus includes a reference light applying unit that includes an incidence plane, that converts reference light to be incident on the incidence plane into reference beams incident on a recording medium from plural directions, and that simultaneously applies the reference beams to the recording medium, and an object light applying unit that applies object light, in which plural identical parallax images are arranged to correspond to the neighboring reference beams having different incidence angles, to the recording medium. | 07-26-2012 |
| 20120194888 | Method and Apparatus for Recording One-Step, Full-Color, Full-Parallax, Holographic Stereograms - Holographic stereograms and holographic optical elements are printed using computer rendered images of 3D computer models or processed images. Printing of one-step, full-color, full-parallax holographic stereograms uses a reference beam-steering system to expose a holographic recording material from different angles by a reference beam. A coherent beam is split into object and reference beams that interfere with each other at an elemental hologram on a holographic recording material. A voxel-control lens can be placed in the path of the object beam and in close proximity to the holographic recording material to control resolution of a holographic stereogram. Interchangable band-limited diffusers and reference-beam masking plates, and viewing zone techniques can be used in the rendering process. | 08-02-2012 |
| 20130100513 | 3-DIMENSIONAL HOLOGRAPHIC IMAGE DISPLAYING APPARATUS - A 3-dimensional (3D) holographic image displaying apparatus is provided. The apparatus includes a hologram reproducer configured to generate surface plasmons in response to incident light and reproduce a 3D image by diffracting the generated surface plasmons by a hologram, and a surface light source unit including a light source and a light guide plate, the light guide plate being configured to allow incident light from the light source to enter into the light guide plate, internally reflect the allowed light, and output the internally reflected light through a light-output surface, the surface light source unit being configured to implement colors by adjusting an angle of the light incident to the hologram reproducer so that the outputted light through the light-output surface is incident to the hologram reproducer at a surface plasmon-forming angle for each wavelength to generate the surface plasmons corresponding to a plurality of color beams. | 04-25-2013 |
| 20130250382 | HOLOGRAMS AND FABRICATION PROCESSES - We fabricate a stereoscopic hologram of an object by capturing a sequence of 2D images of the object, moving camera along a linear axis past the object and keeping the optical axis of the camera perpendicular at each of the positions. The camera lens and image recording surface are translated along the axis such that a fiducial part of the image does not move. The sequence is replayed and a first volume hologram is recorded by recording holograms of the captured images on a diffusing screen in different spatial locations on a surface of the first volume hologram. This is then replayed to form a stereoscopic image of the object and a second, volume reflection hologram of the replayed image is recorded to provide the stereoscopic hologram. A central image of the sequence is aligned to the fiducial part of the holographic image to make the resulting hologram “user-friendly”. | 09-26-2013 |
| 20130265626 | 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. The display device enables a holographic reconstruction of the object. The display device includes a light source and an optical system to illuminate a hologram-bearing medium being encodable with the hologram. The method includes 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. | 10-10-2013 |
| 20130278983 | MICROSCOPE SYSTEM HAVING A DYNAMIC HOLOGRAPHIC IMAGE REPRODUCTION UNIT - A microscope system ( | 10-24-2013 |
| 20140085692 | METHOD AND SYSTEM FOR PROCESSING HOLOGRAM DATA USING HOLOGRAM FRINGE DATA FORMAT ADAPTIVE TO DATA ENCODING SCHEME - A hologram data processing method using a hologram fringe data format adaptive to a data encoding scheme includes configuring model data of a three-dimensional (3D) object corresponding to source data to be used for generating a hologram, computing hologram fringe data by applying a diffraction transform to a light wave transferred to a hologram plane based on the model data of the 3D object, setting, in the computed hologram fringe data, the hologram fringe data format adaptive to a data encoding scheme for reconstructing the hologram, reconstructing an optical hologram by applying the data encoding scheme to the hologram fringe data, and adjusting the optical hologram by comparing a reconstructed image of the optical hologram to a reconstructed image of a numerical hologram. | 03-27-2014 |
| 20140198364 | THREE-DIMENSIONAL IMAGING SYSTEM BASED ON STEREO HOLOGRAM - A three-dimensional imaging system based on a stereo hologram is disclosed. Images composed of sub-images having the same vertical-horizontal resolutions which are generated at plural image projection modules having a two-dimensional arrangement structure are projected to a prism array plate or a transmission-type diffusion plate, and are converted into light points, i.e., image points through a microlens array unit. A diffusion plate used as an image display screen is mounted to a position at which images diffused from the light points intersect with images diffused from the adjacent light points. | 07-17-2014 |
| 20150138615 | DEVICE AND METHOD FOR CREATING STEREOGRAMS WITH LARGE VIEWING ANGLE AND HIGH 2D IMAGE RESOLUTION - A method of generating a stereogram is disclosed. The method includes a first step of partially rendering a preset region of each of a plurality of images having different views to a memory, a second step of extracting a pixel at a corresponding location of the rendered preset region to generate a hogel image, and a third step of repeatedly performing the first step and the second step on a remaining region of each of the plural images to generate a hogel image sequence. Accordingly the stereogram generation method effectively generates a stereogram having high resolution. | 05-21-2015 |
| 20150146271 | SUB-HOLOGRAM GENERATION METHOD AND APPARATUS FOR HOLOGRAPHIC DISPLAY - A sub-hologram generation method and an apparatus for a hologram display are provided, the apparatus including at least a first calculation unit configured to calculate a size of a first sub-hologram area corresponding to a first hologram object using a user viewing window, a second calculation unit configured to calculate a size of a second sub-hologram area corresponding to the first hologram object based on a size of a display pixel, and a determiner configured to compare the size of the first sub-hologram area and the size of the second sub-hologram area, and to determine a sub-hologram area corresponding to the first hologram object based on a result of the comparing. | 05-28-2015 |
| 20160195850 | HOLOGRAM GENERATION METHOD AND APPARATUS | 07-07-2016 |
| 359024000 | Superimposed holograms only | 9 |
| 20080309999 | HOLOGRAPHIC RECORDING DEVICE - A holographic recorder (A | 12-18-2008 |
| 20090021815 | Method and apparatus for phase-encoded homogenized fourier transform holographic data storage and recovery - An apparatus for writing and reading holograms, comprising a spatial light modulator (SLM) operable in phase mode, having a plurality of pixels for generating an object beam that overlaps with a reference beam; a holographic recording medium (HRM) in the path of the object beam; and a first lens element disposed in the path of the object beam between the SLM and the HRM; wherein the HRM is disposed at or near the Fourier transform plane of the first lens element. | 01-22-2009 |
| 20090046336 | HOLOGRAM MULTIPLEX RECORDING AND METHOD, AND HOLOGRAM REPRODUCING DEVICE AND METHOD - A multiplexed holographic recording apparatus of the present invention records multiplexed holograms in a plurality of recording regions that are formed on a holographic recording medium. In particular, the apparatus first records a predetermined number of multiplexed holograms in each of the recording regions formed in a predetermined range or an overall range of the holographic recording medium through holographic recording performed N times, and then performs the (N+1)th holographic recording in each recording region formed in the predetermined range or the overall range. When n other recording regions (where n=0, 1, 2, . . . ) are superimposed on each recording region formed on the holographic recording medium, a difference in the degree of multiplexing between the recording regions formed in the predetermined range or the overall range of the holographic recording medium does not exceed a predetermined value of n+1. | 02-19-2009 |
| 20090046337 | Method of recording and reading angle-multiplexed holograms that compensates for media shrinkage - A method of recording a plurality of holographic images in a holographic media, comprising recording a sequence of multiplexed holograms in a selected storage location in the holographic recording media, each hologram having a respective interbeam angle. The interbeam angle increases for each subsequently recorded hologram to compensate for a variable shrinkage of the holographic media during recording. The multiplexed holograms recorded at the selected storage location are partially or fully overlapped. During reading the recorded holograms, a reference beam is directed at a selected storage location in the holographic recording media at a sequence of incidence angles, each incidence angle being adjusted by a respective adjustment angle. The adjustment angles can be substantially equal. | 02-19-2009 |
| 20090103153 | HOLOGRAPHIC RECORDING AND READING METHOD AND HOLOGRAPHIC RECORDING AND READING APPARATUS - A method of holographically recording and reading information is disclosed. The method includes: recording information in a holographic recording medium by irradiating the holographic recording medium with a laser beam, wherein a transverse sectional area of the laser beam is divided into a central area for a signal beam and a ring-shaped area for a reference beam, the ring-shaped area surrounding the central area with a predetermined gap; and reading out the information from the holographic recording medium by irradiating the holographic recording medium with a ring-shaped readout beam having an area greater than that of the reference beam in at least one of directions inward of an inner diameter thereof and outward of an outer diameter thereof. | 04-23-2009 |
| 20100073747 | Wavelength-multiplex and space-multiplex holographic storage device - The present invention discloses a wavelength-multiplex and space-multiplex holographic storage device, which comprises a storage medium, a plurality of signal light beams and at least one reference light beam. The signal light beams have different wavelengths and illuminate the storage medium. The reference light beam illuminates the storage medium and interferes with the signal light beams to form a plurality of interference patterns. The interference patterns are respectively stored on different-depth storage layers of the storage medium. The present invention not only has a high access rate but also has a large storage capacity. | 03-25-2010 |
| 20100097675 | METHOD AND APPARATUS FOR PHASE-ENCODED HOMOGENIZED FOURIER TRANSFORM HOLOGRAPHIC DATA STORAGE AND RECOVERY - An apparatus for writing and reading holograms, comprising a spatial light modulator (SLM) operable in phase mode, having a plurality of pixels for generating an object beam that overlaps with a reference beam; a holographic recording medium (HRM) in the path of the object beam; and a first lens element disposed in the path of the object beam between the SLM and the HRM; wherein the HRM is disposed at or near the Fourier transform plane of the first lens element. | 04-22-2010 |
| 20120062968 | THREE-DIMENSIONAL IMAGE PROJECTION DEVICE - Provided is a three-dimensional image projector capable of displaying a highly reproducible three-dimensional image in response to changes in a viewer's position and easily accomplishing system downsizing. The three-dimensional image projector | 03-15-2012 |
| 20130170007 | ILLUMINATION DEVICE, PROJECTION APPARATUS AND PROJECTION-TYPE IMAGE DISPLAY APPARATUS - An optical device | 07-04-2013 |
| 359025000 | Discrete hologram only | 7 |
| 20090040581 | RECORDING APPARATUS AND RECORDING METHOD - A recording apparatus for performing recording on a hologram recording medium includes a first light source configured to output first laser light having a first wavelength; a second light source configured to output second laser light having a second wavelength differing from the first wavelength; a recorder configured to perform data recording in units of hologram pages on the data recording layer of the hologram recording medium in such a manner that a recording data sequence is converted into a data pattern in units of hologram pages, the signal light is generated by performing space light modulation on the first laser light on the basis of the data pattern; a reflected light detector configured to irradiate the hologram recording medium with the second laser light; a position controller configured to perform position control; and a recording controller configured to perform control on the recorder. | 02-12-2009 |
| 20090219595 | Device for Reading Out Holograms - The invention relates to an apparatus for transmissively reading out holograms generated by writing light in an optical medium, in particular holograms generated in an optically addressable spatial light modulation device. For this purpose, the apparatus comprises an illumination device for emitting light and an optical system for directing the light from the illumination device onto the optical medium. In this case, the optical system is arranged in the beam path of the writing light. | 09-03-2009 |
| 20090323145 | METHOD AND AN APPARATUS FOR DISPLAYING THREE-DIMENSIONAL IMAGE USING A HOLOGRAM OPTICAL ELEMENT - The image display device including a lighting unit having a plurality of light source units, a hologram optical unit, which reproduces light to form a plurality of screen images spatially apart from each other when light is incident from the lighting unit, and a display panel, which modulates light reproduced by the hologram optical unit according to image signals. | 12-31-2009 |
| 20130208329 | SYSTEM AND METHOD FOR THE EFFICIENT RECORDING OF LARGE APERTURE WAVE FRONTS OF VISIBLE AND NEAR VISIBLE LIGHT - A hybrid system and method for recording wave fronts of light are described. This system combines elements of two imaging systems, Holography and Integral imaging, to produce an imaging system that has higher efficiency and better resolution than Integral imaging, and few of the limitations of holographic recording. | 08-15-2013 |
| 20140022617 | FREEFORM HOLOGRAPHIC IMAGING APPARATUS AND METHOD - A freeform holographic imaging apparatus includes an imaging table for supporting a substrate, an imaging beam positioned adjacent to the imaging table; and a controller operatively connected to the imaging beam and configured to control a position of the imaging beam with respect to the imaging table. The controller is configured to control the imaging beam to image first and second holographic optical elements on the substrate, wherein each of the first and second holographic optical elements are a single pixel. The first holographic optical element is imaged according to a first parameter set and the second holographic optical element is imaged according to a second parameter set. | 01-23-2014 |
| 359026000 | Sequential frames on moving film | 2 |
| 20090116088 | OPTICAL UNIT, METHOD FOR CONTROLLING DRIVE, AND HOLOGRAPHIC APPARATUS - An optical unit includes an acousto-optic deflector and a drive control unit. The drive control unit controls the acousto-optic deflector by changing a frequency of a voltage applied to an acousto-optic medium of the acousto-optic deflector to a frequency in a first frequency range during a first period representing a deflection control period and changing the frequency of the voltage to a frequency in a second frequency range different from the first frequency range during a second period representing a transmittance control period. | 05-07-2009 |
| 20100290099 | Method and Apparatus for Creating and Displaying a Radially Multiplexed Hologram - A method and apparatus for recording and displaying a radially multiplexed hologram is provided. A master hologram is recorded with individual views or frames, arranged in a specific radial pattern and in such a proportion that the convergence of the individually recorded views are simultaneously combined and recorded onto a second hologram. When the second hologram is illuminated by a correctly designed light source a free floating image projecting above the platform on which it was recorded is displayed. The rotating platform presents sequential views to a fixed viewer, creating a moving image. | 11-18-2010 |
