Discrete Hologram Only Patents (Class 359/25)
  • Patent number: 10386789
    Abstract: A hologram display apparatus and a hologram display method are provided. The hologram display apparatus includes a controller and a display device. The controller is configured to obtain plural grayscale values Gi of an image of a to-be-displayed object, generate plural display sub-image codes Qj according to the plurality of grayscale values Gi and transmit the plurality of display sub-image codes Qj to the display device, where i=1, 2, . . . , m, j=1, 2, . . . N, each of m and N is a positive integer. The display device is configured to generate and display plural sub-holograms according to the plurality of display sub-image codes, a quantity of the plurality of sub-holograms being equal to that of the plurality of display sub-image codes, such that the plurality of sub-holograms are superimposed to generate a hologram of the image of the to-be-displayed object in human eyes.
    Type: Grant
    Filed: July 11, 2017
    Date of Patent: August 20, 2019
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventor: Bingchuan Shi
  • Patent number: 9875599
    Abstract: An operation device installed on a play machine has a push button switch having a push button made of a translucent material, a floating image projector that projects a floating image into midair above the push button through the push button from a rear face side of the push button, and a gesture detector in which at least a region where the floating image is projected is set to be a detection region.
    Type: Grant
    Filed: June 10, 2015
    Date of Patent: January 23, 2018
    Assignee: OMRON Corporation
    Inventor: Hiroyuki Onitsuka
  • Patent number: 9509956
    Abstract: A wavefront is optimized imaging a sample. A binary off-axis hologram is encoded by selective adoption of states for each mirror of a deformable mirror device, which is illuminated with an incident beam of light. A single diffraction order that has encoded phase-mask information is selected from light reflected from the deformable mirror device and focused onto the sample. Light scattered from the sample is directed to a photodetector. A transmission matrix through the sample is calculated from light received by the photodetector.
    Type: Grant
    Filed: November 7, 2012
    Date of Patent: November 29, 2016
    Assignee: The Regents Of The University Of Colorado, A Body Corporate
    Inventors: Rafael Piestun, Donald Conkey
  • Patent number: 9377759
    Abstract: An optical device including a hologram recording medium that can reproduce an image of a reference member and an irradiation unit that emits a coherent light beam to the optical device. The irradiation unit includes a light source for emitting a coherent light beam and a scanning device capable of adjusting a reflection angle of the coherent light beam emitted from the light source and that makes a reflected coherent light beam scan the hologram recording medium. The light source has light sources for emitting coherent light beams having different wavelength ranges. The hologram recording medium has a plurality of recording areas to be scanned with a plurality of coherent light beams reflected by the scanning device, respectively. Each of the plurality of recording areas has an interference fringe that diffracts a coherent light beam of the corresponding wavelength range.
    Type: Grant
    Filed: September 8, 2011
    Date of Patent: June 28, 2016
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Makio Kurashige, Kazutoshi Ishida, Tomoe Takanokura, Yasuyuki Ooyagi
  • Patent number: 9104175
    Abstract: A plurality of light sources of different wavelength bands can be provided. An imaging device can be configured to modulate incoming light according to video image data and output modulated light. A projection lens can be positioned to project the modulated light. An optical combiner can be disposed between the light sources and the imaging device. A plurality of holographic devices can each include a plurality of different holographic elements selectively positionable in a light path extending between one of the light sources and the optical combiner. Each of the holographic elements can define a light-shaping hologram. A controller can be configured to selectively position the holographic elements of the holographic devices based on the video image data.
    Type: Grant
    Filed: March 8, 2013
    Date of Patent: August 11, 2015
    Assignee: Christie Digital Systems USA, Inc.
    Inventor: Michael Perkins
  • Patent number: 9001401
    Abstract: A process by which a multi-image type hologram, wherein one 3D image changes over to another depending on a viewing direction, can be fabricated in a simple construction, and a multi-image type hologram fabricated by that process. According to the process for the fabrication of a multi-image type hologram wherein one image changes over to another depending on a viewing direction, the area of a hologram recording material is divided into a plurality of sub-areas. Objects to be displayed on different images are holographically recorded in the respective sub-areas, using reference light having the same angle of incidence, images recorded in the respective sub-areas are simultaneously reconstructed from the recorded first-stage hologram, so that a second-stage hologram recording material is located near the reconstructed object images for recording them as a reflection or transmission type volume hologram.
    Type: Grant
    Filed: December 7, 2006
    Date of Patent: April 7, 2015
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Tsuyoshi Yamauchi, Masachika Watanabe, Tomoko Kumasawa, Makio Kurashige, Akiko Kitamura, Mitsuru Kitamura, Kenji Ueda
  • Patent number: 8842351
    Abstract: A method for storing data including: providing a first substrate having a plurality of micro-holograms therein, the micro-holograms being indicative of the data; providing a second hologram-supporting substrate; illuminating the plurality of micro-holograms in the first substrate through the second substrate, thereby producing a holographic pattern in the second substrate indicative of reflections of the plurality of micro-holograms in the first substrate; providing a third hologram-supporting substrate; and, illuminating the holographic pattern in the second substrate through the third substrate, thereby substantially replicating the plurality of micro-holograms in the first substrate in the third substrate.
    Type: Grant
    Filed: June 17, 2008
    Date of Patent: September 23, 2014
    Assignee: General Electric Company
    Inventors: Brian L. Lawrence, Marc Dubois, Pingfan P. Wu, Joseph L. Smolenski, Xiaolei Shi, Eugene P. Boden
  • Patent number: 8828624
    Abstract: A system for recording multiple volume Bragg gratings (VBGs) in a photo thermo-refractive material is configured to implement a method which provides for irradiating the material by a coherent light through a phase mask. The system has a plurality of actuators operative to displace the light source, phase mask and material relative to one another so as to mass produce multiple units of the material each having one or more uniformly configured VBGs.
    Type: Grant
    Filed: August 3, 2009
    Date of Patent: September 9, 2014
    Assignee: IPG Photonics Corporation
    Inventors: Valentin P Gapontsev, Alex Ovtchinnikov, Dmitry Starodubov, Alexey Komissarov
  • Patent number: 8797382
    Abstract: Various embodiments of the present invention are directed to negative refractive index-based holograms that can be electronically controlled and dynamically reconfigured to generate one or more color three-dimensional holographic images. In one aspect, a hologram comprises a phase-control layer having a plurality of phase modulation elements. The phase-modulation elements are configured with a negative effective refractive index and selectively transmit wavelengths associated with one of three primary color wavelength. The hologram also includes an intensity-control layer including a plurality of intensity-control elements. One or more color three-dimensional images can be produced by electronically addressing the phase-modulation elements and intensity-control elements in order to phase shift and control the intensity of light transmitted through the hologram. A method for generating a color holographic image using the hologram is also provided, as is a system for generating a color holographic image.
    Type: Grant
    Filed: April 13, 2009
    Date of Patent: August 5, 2014
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Jingjing Li, Philip J. Kuekes
  • Patent number: 8717650
    Abstract: Methods create images viewable under different selected angles on optical storage devices and other photosensitive surfaces and optical storage devices with super-imposed images. Generally, a photosensitive surface is exposed with multiple diffraction patterns creating super-imposed images. These diffraction patterns create super-imposed images on the photosensitive surfaces, which can be read by either a human or a computer.
    Type: Grant
    Filed: October 4, 2013
    Date of Patent: May 6, 2014
    Assignee: Stamper Technology, Inc.
    Inventor: Bruce Ha
  • Patent number: 8642231
    Abstract: A volume hologram recording material is located on the side of a reflection type volume hologram master onto which copying illumination light is incident, and the copying illumination light incident onto the recording material and light diffracted through the master interfere together in the volume hologram recording material thereby copying the reflection type volume hologram master. In this case, a reflecting plate having a fine regular reflection pattern is interleaved between the master and the recording material, and the copying illumination light incident onto the recording material and regularly reflected light from the reflecting plate having the regular reflection pattern interfere together in the recording material thereby allowing the regular reflection pattern to be multi-recorded in a hologram having the reflection type volume hologram master copied in it.
    Type: Grant
    Filed: March 20, 2012
    Date of Patent: February 4, 2014
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Tsuyoshi Yamauchi, Kenji Ueda, Masachika Watanabe
  • Publication number: 20140022617
    Abstract: 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.
    Type: Application
    Filed: July 20, 2012
    Publication date: January 23, 2014
    Inventors: John Hazen, Larry Hoague
  • Patent number: 8630032
    Abstract: Two adjacent images are recorded in a state smoothly blended at a boundary portion. On a recording plane Rec, provided is a region M1 in which an original image Pic(A) is recorded, a region M2 in which an original image Pic(B) is recorded, and a middle region Mm positioned therebetween. The region Mm is divided into a plurality of strip-like regions f1 to f6. The widths of the strip-like regions f1, f3, and f5 that are odd-numbered when counted from the region M1 are set so as to increase monotonically in this order, while the widths of the even-numbered strip-like regions f2, f4, and f6 are set so as to decrease monotonically in this order.
    Type: Grant
    Filed: March 13, 2008
    Date of Patent: January 14, 2014
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Mitsuru Kitamura, Masato Taninaka, Masayo Shima
  • Publication number: 20140009809
    Abstract: A hologram recording apparatus is provided, including: a coherent light source; a beam splitter which splits a beam emitted from the coherent light source into a signal beam and a reference beam; a signal beam forming unit including a first optical element which splits the signal beam into a plurality of sub signal beams and deflects the plurality of sub signal beams in different directions. The signal beam forming unit further directs the plurality of sub signal beams onto a hologram recording medium. The recording apparatus also includes a reference beam forming unit which directs the reference onto a location on the hologram recording medium which overlaps with locations on the hologram recording medium on which the plurality of sub signal beams are incident.
    Type: Application
    Filed: March 15, 2013
    Publication date: January 9, 2014
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Kyoung-seok Pyun, Andrew Putilin, Alexander Morozov, Ivan Bovsunovskiy, Chil-sung Choi
  • Patent number: 8625183
    Abstract: A holographic volumetric display comprises a pattern generation unit (20), a programmable lighting device and a holographic screen (28). The holographic screen contains one or more pre-recorded set(s) of spatially sampled holographic interference patterns (or sub-holograms) each capable of reproducing one or more volume element(s) or voxel(s) (32) in three dimensional space outside the plane of the holographic screen when each sub-hologram is selectively illuminated. A sub-hologram is a sampled hologram of a voxel and sub-holograms in one set are spatially interleaved across the surface of the holographic screen with other sub-holograms. The programmable lighting device may be provided by a color digital projection unit (28) and the pattern generation unit which can illuminate any number of sub-holograms on the holographic screen. In this way, a volumetric display with holographic voxels can be made. The holographic volumetric display can reconstruct three-dimensional moving images in color.
    Type: Grant
    Filed: March 5, 2009
    Date of Patent: January 7, 2014
    Inventor: Javid Khan
  • Publication number: 20130208329
    Abstract: 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.
    Type: Application
    Filed: December 21, 2012
    Publication date: August 15, 2013
    Applicant: Zazzle.com , Inc.
    Inventor: Zazzlle Inc.
  • Publication number: 20130170007
    Abstract: An optical device 50 including a hologram recording medium 55 that can reproduce an image of a reference member and an irradiation unit that emits a coherent light beam to the optical device 50. The irradiation unit 60 includes a light source for emitting a coherent light beam and a scanning device 65 capable of adjusting a reflection angle of the coherent light beam emitted from the light source and that makes a reflected coherent light beam scan the hologram recording medium. The light source has light sources for emitting coherent light beams having different wavelength ranges. The hologram recording medium 55 has a plurality of recording areas to be scanned with a plurality of coherent light beams reflected by the scanning device 65, respectively. Each of the plurality of recording areas has an interference fringe that diffracts a coherent light beam of the corresponding wavelength range.
    Type: Application
    Filed: September 8, 2011
    Publication date: July 4, 2013
    Applicant: DAI NIPPON PRINTING CO., LTD.
    Inventors: Makio Kurashige, Kazutoshi Ishida, Tomoe Takanokura, Yasuyuki Ooyagi
  • Patent number: 8450029
    Abstract: A multi-layer body having a partially shaped first layer and a diffractive first relief structure shaped in a first region of a replication layer. The first layer is applied to the replication layer in the first region and, in a second region, a photosensitive layer is applied to the first layer or a photosensitive washing mask is applied thereto as a replication layer. The photosensitive layer or the washing mask is exposed through the first layer so that the photosensitive layer or washing mask is exposed differently due to the first relief structure in the first and in the second regions, and the first layer is removed using the exposed photosensitive layer or washing mask as a mask layer in the first region but not in the second region or in the second region but not in the first region.
    Type: Grant
    Filed: October 4, 2011
    Date of Patent: May 28, 2013
    Assignee: OVD Kinegram AG
    Inventors: Rene Staub, Wayne Robert Tompkin, Andreas Schilling
  • Patent number: 8294965
    Abstract: A holographic reconstruction system and method for the three-dimensional reconstruction of object light points of a scene. The system includes spatial light modulation means which modulate light waves capable of interference with at least one video hologram, focusing means which focus the modulated light waves so that a viewer can view the reconstructed object light points of the scene from a visibility region that is thereby produced by focusing, and deflection means which position the visibility region by aligning the modulated light waves. The holographic reconstruction system includes deflection control means for controlling the deflection means to sequentially adjust the visibility region to different contiguous viewing positions, and light controlling means for switching the light waves in synchronicity with the deflection control means.
    Type: Grant
    Filed: May 14, 2008
    Date of Patent: October 23, 2012
    Assignee: SeeReal Technologies S.A.
    Inventors: Steffen Buschbeck, Armin Schwerdtner
  • Patent number: 8279507
    Abstract: The invention relates to a hologram that enables two or more different images to be simultaneously reconstructed even in a state where the hologram is fixed in terms of relative position with respect to an eye, and a holographic viewing device that incorporates it. The hologram 14 is fabricated by applying Fourier transform to a plurality of input image to obtain a plurality of corresponding Fourier transform images 13-1, 13-2 and arraying the Fourier transform images 13-1, 13-2 on the same plane according to a given two-dimensional array principle into a computer-generated hologram. When a plurality of point light sources 231 to 239 located behind the hologram 14 are viewed through the hologram 14, a plurality of images are simultaneously and parallel reconstructed (28) in correspondence to the array positions of the plurality of Fourier transform images.
    Type: Grant
    Filed: November 14, 2009
    Date of Patent: October 2, 2012
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventor: Akiko Tanaka
  • Patent number: 8264757
    Abstract: Methods create images viewable under different selected angles on optical storage devices and other photosensitive surfaces and optical storage devices with super-imposed images. Generally, a photosensitive surface is exposed with multiple diffraction patterns creating super-imposed images. These diffraction patterns create super-imposed images on the photosensitive surfaces, which can be read by either a human or a computer.
    Type: Grant
    Filed: April 9, 2010
    Date of Patent: September 11, 2012
    Assignee: Stamper Technologies, Inc.
    Inventor: Bruce Ha
  • Patent number: 8247139
    Abstract: There is provided volume holographic data recording media having a recording layer which is capable of recording interference fringes generated by interference of light having excellent coherence as fringes having different refractive indexes and undergoes holographic data recording by an amount of spatial shift distance of not more than 3 ?m which is smaller than that of conventional media.
    Type: Grant
    Filed: March 28, 2008
    Date of Patent: August 21, 2012
    Assignee: Daikin Industries, Ltd.
    Inventors: Kazuyuki Satou, Kazuko Aoki, Makoto Hanazawa
  • Patent number: 8228574
    Abstract: A holographic data storage medium and an apparatus and method for recording/reproducing holographic data using the same. The holographic data storage medium includes a substrate; a holographic recording layer disposed on the substrate; and a cover layer covering the holographic recording layer. The holographic recording layer includes a data recording region including a plurality of data layers to which data is recorded, the data recording region in which interference fringes due to first and second beams are formed in different data layers in a depthwise direction; and a layer discrimination region for providing discrimination between the data layers.
    Type: Grant
    Filed: June 16, 2008
    Date of Patent: July 24, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Moon-Il Jung, Young-min Cheong, Taek-seong Jeong
  • Patent number: 8218213
    Abstract: A method of manufacturing a master for producing a hologram device. A first master is produced with a compensating angle. The second master is produced from the first master with an index matching material to reduce the interference pattern caused by internal reflections within the holographic plate of the master. The hologram device has a relatively narrow angle of reconstruction to provide visibility from a nearly perpendicular light source such as the headlight of an on-coming vehicle.
    Type: Grant
    Filed: July 2, 2007
    Date of Patent: July 10, 2012
    Assignee: Ciaudelli Productions, Inc
    Inventors: Joseph J. Ciaudelli, Ikuo Nakamura, Ana Maria Nicholson
  • Patent number: 8187771
    Abstract: Described is a process for the production of a multi-layer body having a volume hologram with at least two different items of image information, wherein a photosensitive layer (46) of the multi-layer body is directly or with the interposition of a transparent optical medium (44s, 45) brought into contact with the front side of a master (44), in which interlaced regions with different asymmetrical surface structures or kinoform structures are shaped, which embody the at least two different items of image information. The photosensitive layer (46) and the master are exposed with a coherent light beam (47) whereby a volume hologram is formed in the photosensitive layer (46). Also described are a master for the production of the multi-layer body and a security element having said multi-layer body.
    Type: Grant
    Filed: April 5, 2007
    Date of Patent: May 29, 2012
    Assignee: OVD Kinegram AG
    Inventors: René Staub, Wayne Robert Tompkin, Andreas Schilling, Ludwig Brehm, Achim Hansen
  • Patent number: 8182966
    Abstract: A data storage device including: a plastic substrate having a plurality of volumes arranged in tracks along a plurality of vertically stacked, laterally extending layers therein; and, a plurality of micro-holograms each contained in a corresponding one of the volumes; herein, the presence or absence of a micro-hologram in each of the volumes is indicative of a corresponding portion of data stored.
    Type: Grant
    Filed: December 23, 2008
    Date of Patent: May 22, 2012
    Assignee: General Electric Company
    Inventors: Kenneth Brakeley Welles, Zhiyuan Ren, Brian Lee Lawrence, Pingfan Peter Wu, John Erik Hershey, Xiaolei Shi, John Anderson Fergus Ross, Victor Petrovich Ostroverkhov
  • Patent number: 8135219
    Abstract: A method of detecting and compensating fail pixels in a holographic storage system. The method includes steps of: providing a plurality of image frames to show on a data plane for all pixels on the data plane being capable of outputting a light state or a dark state; sequentially recording the image frames into a storage medium; detecting the image frames by using a detecting apparatus for all pixels on the detecting apparatus being capable of outputting sensing signals corresponding to the light state and the dark state; defining a sensing difference value, which is a difference of the sensing signal outputting the light state and the dark state generated by one pixel; comparing the sensing difference value with a threshold value; and defining the corresponding pixel is a fail pixel if the sensing difference value is smaller than the threshold value.
    Type: Grant
    Filed: March 7, 2007
    Date of Patent: March 13, 2012
    Assignee: Lite-On It Corp.
    Inventors: Chia-Yen Chang, Hsin-Ping Cheng
  • Publication number: 20120050832
    Abstract: A method of generating a hologram of an object is disclosed. The method comprises: receiving data corresponding to a plurality of non-coherent sub-holograms acquired by an optically passive synthetic aperture holographic apparatus, combining the sub-holograms to generate a mosaic hologram of the object, and transmitting the mosaic hologram to a computer readable medium.
    Type: Application
    Filed: March 31, 2010
    Publication date: March 1, 2012
    Applicant: BEN GURION UNIVERSITY OF THE NEGEV RESEARCH AND DEVELOPMENT
    Inventors: Joseph Rosen, Barak Katz
  • Publication number: 20120050833
    Abstract: In an illustrative implementation of this invention, an animated holographic display is created as follows: Multiple HPO holograms in the shape of horizontal strips are recorded on an H2 medium. These horizontal strips are vertically displaced from each other. An animated real image is displayed by sequentially illuminating these HPO holograms. Unless corrected, this approach causes the animated image to appear to rotate vertically. The vertical parallax rotation arises because, when recording the HPO holograms, the vertical perspectives of the various HPO holograms differ. In illustrative implementations of this invention, this vertical parallax rotation may be corrected at least three different ways: (1) the content of H1 may be pre-rotated, (2) H1, H2 or both may be translated during exposures, or (3) only a thin horizontal stripe of H1 may be illuminated during holographic transfer to eliminate vertical parallax in the real image transmitted from H1.
    Type: Application
    Filed: August 30, 2010
    Publication date: March 1, 2012
    Applicant: MASSACHUSETTS INSTITUTE OF TECHNOLOGY
    Inventors: Victor Michael Bove, JR., Daniel Smalley, Quinn Smithwick
  • Patent number: 8120829
    Abstract: A method for holographic data recording and simultaneous data readout without requiring additional optical power for readout illumination is provided. The method comprises reflecting a transmitted portion of a data light beam or of a reference light beam used for holographic recording of data in a holographic data storage medium. The reflected beam is configured to illuminate the holographic data storage medium from the opposite side with a polarization orthogonal to that of the recording beams, such that it provides a counter-propagating readout beam for real-time readout of currently being recorded hologram. Readout beam may also be configurable for accessing any one of the at least one previously recorded holograms. Systems using the methods of the invention are also provided.
    Type: Grant
    Filed: April 24, 2006
    Date of Patent: February 21, 2012
    Assignee: Oracle America, Inc.
    Inventors: Christophe N. Sigel, Michael L. Leonhardt
  • Patent number: 8084168
    Abstract: A data storage device including: a plastic substrate having a plurality of data volumes arranged along tracks in a plurality of stacked layers; a plurality of micro-holograms each contained in a corresponding one of the data volumes; a plurality of complementary volumes, each corresponding to and being substantially aligned with one of the data volumes; a plurality of micro-holograms each contained in a corresponding one of the complementary volumes; wherein, the presence or absence of a micro-hologram in each of the data volumes is indicative of a corresponding portion of data stored; and, the ones of the complementary volumes corresponding to the ones of the data volumes containing a micro-hologram do not contain a micro-hologram; and the ones of the complementary volumes corresponding to the ones of the data volumes not containing a micro-hologram contain a micro-hologram.
    Type: Grant
    Filed: December 23, 2008
    Date of Patent: December 27, 2011
    Assignee: General Electric Company
    Inventors: Pingfan Peter Wu, Xiaolei Shi, Zhiyuan Ren, Brian Lee Lawrence, John Erik Hershey, Kenneth Brakeley Welles, John Anderson Fergus Ross, Victor Petrovich Ostroverkhov
  • Patent number: 8081360
    Abstract: A light-collecting device is provided, a light-collecting device, including: a first volume hologram recorded in a hologram recording layer by interference of a first spherical wave and a planar wave, the first spherical wave passing through a light path of diffused light which radiates from a light incident point, passes through the hologram recording layer and spreads to a predetermined diameter; and a second volume hologram recorded in the hologram recording layer by interference of a second spherical wave and the planar wave, the second spherical wave passing through a light path of converging light which radiates from the same side as the first spherical wave, passes through the hologram recording layer and converges at an image-forming point distanced from the hologram recording layer by a predetermined distance, the planar wave intersecting with the first spherical wave and the second spherical wave.
    Type: Grant
    Filed: September 11, 2009
    Date of Patent: December 20, 2011
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Shin Yasuda, Jiro Minabe, Katsunori Kawano, Yasuhiro Ogasawara, Kazuhiro Hayashi
  • Patent number: 7847993
    Abstract: The disclosure is directed to hologram elements, illuminators, and projectors. In one example, a hologram element comprises a relief structure configured to diffract incident light to form a first illumination pattern and a second illumination pattern on an illuminated surface. The second illumination pattern may form a specific mark for uniquely identifying the hologram element. In certain embodiments, the second illumination pattern is formed outside an illumination area. In other embodiments, the second illumination area is formed inside the illumination area.
    Type: Grant
    Filed: March 15, 2008
    Date of Patent: December 7, 2010
    Assignee: Seiko Epson Corporation
    Inventor: Taisuke Yamauchi
  • Publication number: 20100290099
    Abstract: 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.
    Type: Application
    Filed: May 17, 2010
    Publication date: November 18, 2010
    Inventors: Joyce A. Padiyar, Dinesh D. Padiyar
  • Publication number: 20100238529
    Abstract: A reflective or transmissive hologram may be used to extract light from a waveguide. The hologram may be formed by separately exposing each of a plurality of areas of a holographic medium with object beams and/or reference beams having attributes (e.g., illumination angles) that vary randomly or pseudorandomly over the entire hologram. The areas may be contiguous (e.g., in a tiled pattern) or overlapping. In some embodiments, the spacing and/or orientation of the diffraction gratings may vary from area to area. For example, the spacing and/or orientation of the diffraction gratings may vary randomly or pseudorandomly from area to area. Some parts of the hologram may intentionally be made relatively more or relatively less efficient at extracting light from the waveguide.
    Type: Application
    Filed: March 23, 2009
    Publication date: September 23, 2010
    Inventors: JEFFREY BRIAN SAMPSELL, MAREK MIENKO
  • Patent number: 7760407
    Abstract: A multilayer holographic recording medium that improves recording density and data transfer rates. The multilayer holographic recording medium, from which information is reproduced by a multilayer holographic memory reproducing apparatus, includes a plurality of deposited holographic recording layers. During recording, a reference beam is common to those holographic recording layers and an incident angle of an object beam is modulated for each holographic recording layer. During reproduction, a laser beam for reproduction having the same condition as that of the reference beam used for recording is projected thereonto, so that diffraction beams are simultaneously generated in the respective holographic recording layers to directions that are the same as incident directions of the object beam used for recording.
    Type: Grant
    Filed: September 3, 2004
    Date of Patent: July 20, 2010
    Assignee: TDK Corporation
    Inventors: Takuya Tsukagoshi, Jiro Yoshinari, Hideaki Miura, Tetsuro Mizushima
  • Patent number: 7759020
    Abstract: A method and system for providing multi-color holographic optical traps and patterns. The method and system employs a laser beam which interacts with a diffractive optical element with a hologram and for optics which acts to selectively pass or attenuate different light color wavelengths and to position the particular color light at selected different locations to form the different color holographic optical trap patterns and to use these patterns for various commercial purposes.
    Type: Grant
    Filed: May 24, 2006
    Date of Patent: July 20, 2010
    Assignee: New York University
    Inventors: David G. Grier, Sang-Hyuk Lee
  • Patent number: 7679797
    Abstract: The invention relates to a hologram that enables two or more different images to be simultaneously reconstructed even in a state where the hologram is fixed in terms of relative position with respect to an eye, and a holographic viewing device that incorporates it. The hologram 14 is fabricated by applying Fourier transform to a plurality of input image to obtain a plurality of corresponding Fourier transform images 13-1, 13-2 and arraying the Fourier transform images 13-1, 13-2 on the same plane according to a given two-dimensional array principle into a computer-generated hologram. When a plurality of point light sources 231 to 239 located behind the hologram 14 are viewed through the hologram 14, a plurality of images are simultaneously and parallel reconstructed (28) in correspondence to the array positions of the plurality of Fourier transform images.
    Type: Grant
    Filed: June 18, 2007
    Date of Patent: March 16, 2010
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventor: Akiko Tanaka
  • Publication number: 20090323145
    Abstract: 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.
    Type: Application
    Filed: February 2, 2009
    Publication date: December 31, 2009
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Sunil KIM, Yoonsun CHOI
  • Patent number: 7618750
    Abstract: The hologram recording sheet according to the invention is made up of a base film and hologram sensitive materials sensitive to different wavelength regions formed therein in a desired pattern, or a film and at least two hologram recording sensitive materials sensitive to different wavelength regions laminated on the film with a transparent plastic spacer layer located therebetween, thereby enabling the required diffraction light wavelengths to be recorded on the required sites without producing unnecessary interference fringes. At least two hologram recording sensitive materials sensitive to different wavelength regions are formed on different sites on a film in dotted or striped configuration, the size of which is up to 200 mm or at least twice as large as the thickness of the sensitive material layers, thereby enabling regions diffracting light of different wavelengths to be formed in the form of independent sets of interference fringes.
    Type: Grant
    Filed: August 16, 2006
    Date of Patent: November 17, 2009
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Kenji Ueda, Tsuyoshi Hotta, Yukio Taniguchi, Atsushi Sekiguchi, Hideyuki Iriyama
  • Patent number: 7589877
    Abstract: The present invention provides one or more books of holograms recorded in a recording medium, wherein two or more short stacks of the one or more books have locations that differ from each other by a movement difference. The present invention also provides methods and devices for recording and reading holograms from the one or more books of holograms.
    Type: Grant
    Filed: December 2, 2005
    Date of Patent: September 15, 2009
    Assignee: Inphase Technologies, Inc.
    Inventors: Ken E. Anderson, William L. Wilson, Kevin R. Curtis
  • Publication number: 20090219595
    Abstract: 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.
    Type: Application
    Filed: February 27, 2009
    Publication date: September 3, 2009
    Applicant: SeeReal Technologies S.A.
    Inventors: Jean-Christophe Olaya, Grigory Lazarev
  • Publication number: 20090040581
    Abstract: 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.
    Type: Application
    Filed: August 1, 2008
    Publication date: February 12, 2009
    Applicant: SONY CORPORATION
    Inventors: Tatsuo Hori, Satoru Seko
  • Publication number: 20090021812
    Abstract: The invention relates devices for recording or reading out an encoded hologram. Said devices are arranged to record or to read out spatially separated data structures, as well as mutually spatially separated data holograms (36) and positioning holograms (37) associated with positioning structures that are structurally simple compared to the data structures. Said positioning holograms (37) can be analyzed separately from the data holograms (36) in order to align a modulation pattern in an iteration. The hologram can thus be correctly aligned relatively easily even in the event of complex data structures or modulation structures.
    Type: Application
    Filed: October 14, 2005
    Publication date: January 22, 2009
    Applicant: FRAUNHOFER-GESELLSCHAFT ZUR FORDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
    Inventors: Dietmar Eberhard, Wolfgang Riedel, Dominik Giel, Karsten Sassenscheid
  • Publication number: 20090021814
    Abstract: Hologram recording and reconstruction apparatuses and method thereof are provided. The hologram recording apparatus comprises a laser source, a spatial light modulator, and a Fourier lens. The laser source provides a coherent light beam. The spatial light modulator receives m-bits data to only determine a (p×q) block comprising ON-pixels less than OFF-pixels, and receives the coherent light beam to modulate with the (p×q) block to generate the signal beam. The Fourier lens focuses the signal beam on the hologram recording medium, so that when the focused signal beam and a focused reference beam is modulated together, the hologram data is generated to be recorded on the hologram recording medium.
    Type: Application
    Filed: July 15, 2008
    Publication date: January 22, 2009
    Applicant: MEDIATEK INC.
    Inventors: Chi-Yun CHEN, Tzi-Dar CHIUEH
  • Patent number: 7443553
    Abstract: An array of discrete sensors disposed on a substrate, each sensor comprising a holographic support medium and a hologram disposed throughout the volume of the medium, whereby interaction with an analyte results in a variation of a property of the medium.
    Type: Grant
    Filed: March 11, 2004
    Date of Patent: October 28, 2008
    Assignee: Smart Holograms Limited
    Inventors: Christopher Robin Lowe, Colin Alexander Bennett Davidson, Jeffrey Blyth, Alexander James Marshall, Anthony Peter James
  • Patent number: 7424185
    Abstract: High efficiency reflective volume Bragg gratings with chirped gratings recorded in photo-thermo-refractive glass having an absolute diffraction efficiency exceeding 95% in transmitting and reflecting modes are used to stretch and/or compress ultrashort laser pulses with high efficiency. Robustness, compactness, thermal and laser stability along with placement of multiple elements in the same space provides femtosecond laser system with high efficiency of stretching and re-compression of femtosecond pulses.
    Type: Grant
    Filed: December 22, 2005
    Date of Patent: September 9, 2008
    Assignees: University of Central Florida Research Foundation, Inc., University of Michigan
    Inventors: Leonid B Glebov, Emilie Flecher, Vadim I. Smirnov, Almantas Galvanauskas, Kai-Hsiu Liao
  • Publication number: 20080062489
    Abstract: A method and apparatus for improving quality of a signal reproduced from a holographic storage medium in which a hologram is recorded by interference between a signal beam and a reference beam. The signal-quality improving method includes determining a page crosstalk value, which is caused in a page that is to be reproduced from the holographic storage medium by an adjacent page to the page that is to be reproduced, on the basis of on-pixel crosstalk values caused by a plurality of on-pixels of the adjacent page; and removing the determined page crosstalk value from a reproduced signal of the page that is to be reproduced. Since an interpage crosstalk that occurs when multiplexing recording in the holographic storage medium is calculated, and is removed from a reproduced signal, the quality of the reproduced signal can be improved.
    Type: Application
    Filed: March 8, 2007
    Publication date: March 13, 2008
    Applicant: Samsung Electronics Co., Ltd
    Inventors: Taek-seong Jeong, Jong-chul Choi, Moon-il Jung
  • Publication number: 20080037086
    Abstract: An apparatus to control the incident angle of a reference beam, includes a first lens element to allow the reference beam to be incident on a holographic recording medium, and a driving portion to provide the reference beam to the first lens element and to move in a direction perpendicular to an optical axis to change the incident position of the reference beam on the first lens element in a radial direction of the first lens element, wherein the incident angle of the reference beam incident on the holographic recording medium is determined according to the incident position of the reference beam in a radial direction of the first lens element.
    Type: Application
    Filed: January 22, 2007
    Publication date: February 14, 2008
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Taek-seong Jeong, Jong-chul Choi, Moon-il Jung
  • Patent number: 7312907
    Abstract: A hologram recording and playback method comprises establishing in advance a test region adapted to record a piece of test data for each of a reference incidence angle and a plurality of stepped incidence angles of a recording reference beam in a recording medium, successively setting an incidence angle of the recording reference beam equal to the reference incidence angle or one of the plurality of the stepped incidence angles, successively recording in the test region each piece of the test data, causing a playback reference beam to be applied to the test region at the same incidence angle as the reference incidence angle to globally play back all the pieces of the test data, selecting the data with the maximum diffraction efficiency, and correcting the incidence angles of the recording reference beam and the playback reference beam based on the difference between the reference incidence angle or one of the plurality of the stepped incidence angles corresponding to the selected data and the reference incide
    Type: Grant
    Filed: August 16, 2005
    Date of Patent: December 25, 2007
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Kazuya Kogure, Aaron Wegner