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| Number | Title | Issue Date |
| 8416480 | Hologram reproducing apparatus, hologram reproducing method, and phase modulating element A hologram reproducing apparatus includes a first reference light path leading laser light from a laser light source so that a hologram recording medium is irradiated with first reference light; a diffracted light path leading diffracted light, generated from the ho... | 04/09/2013 |
| 8355190 | Method and device for reducing speckle A method for reducing speckle patterns of a three-dimensional holographic reconstruction is disclosed. A controllable light modulator into which a hologram of a three-dimensional scene is coded is illuminated by coherent light, a reconstruction lens transforms the m... | 01/15/2013 |
| 8351103 | Method and device for reducing speckle A method for reducing speckle patterns of a three-dimensional holographic reconstruction is disclosed. A controllable light modulator into which a three-dimensional scene is coded is illuminated by coherent light, a reconstruction means projects the modulated light ... | 01/08/2013 |
| 8335028 | Holographic projection device for the enlargement of a reconstruction volume This invention relates to a holographic projection device with an array of mirror elements in the form of micro-mirrors. The holographic projection device comprises at least one light modulator device, which contains the array of mirror elements, for an enlargement ... | 12/18/2012 |
| 8310746 | 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 dis... | 11/13/2012 |
| 8294966 | 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 ... | 10/23/2012 |
| 8218213 | Narrow angle hologram device and method of manufacturing same 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 reflec... | 07/10/2012 |
| 8208186 | Polarization-based holographic optical reproducing apparatus including dc modulating element An optical reproducing method. A diffracted light is generated by irradiating a reference light onto a hologram. A combined light is generated by applying a direct-current component formed by a polarized light having a third polarization component with a first polar... | 06/26/2012 |
| 8134765 | Hologram recording and reconstruction apparatus A hologram recording and reconstruction apparatus records and reconstructs a hologram in a recording layer of a holographic recording medium using a signal light beam and a reference light beam. The apparatus includes an objective lens, a spatial light modulator on ... | 03/13/2012 |
| 8120829 | System and method for real time holographic data recording and readout 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 ho... | 02/21/2012 |
| 7880946 | Method of improving quality of signals reproduced from holographic storage medium and apparatus therefor 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 crosstal... | 02/01/2011 |
| 7876482 | Method for wavelength mismatch compensation in a holographic storage system A method for compensating for a wavelength mismatch between a readout reference beam and a recording reference beam in a holographic storage system is described. In order to compensate for a wavelength mismatch in a first step the wavelength mismatch is determined. ... | 01/25/2011 |
| 7804633 | Hologram recording film with additional information and recording method therefor A hologram recording film has an image of a three-dimensional object, e.g. a three-dimensional model, recorded in a volume hologram photosensitive material and further has a hologram image of a plane color pattern, e.g. a character or an image, together with the sha... | 09/28/2010 |
| 7773276 | Method for determining media orientation and required temperature compensation in page-based holographic data storage systems using data page Bragg detuning measurements Methods and systems for calculating a wavelength to use for a reference beam in recovering data from a holographic storage medium along with calculating a rotation and a tilt for the storage medium in data recovery. These systems and method include determining inten... | 08/10/2010 |
| 7742211 | Sensing and correcting angular orientation of holographic media in a holographic memory system by partial reflection, the system including a galvano mirror A holographic memory system is disclosed. The holographic memory system comprises: a light source configured to generate a light beam; a photosensitive holographic storage medium configured to at least partially reflect the light beam; and an alignment module config... | 06/22/2010 |
| 7619794 | Hologram-reproducing method and hologram-reproducing device A hologram-reproducing method is adapted to obtain a reproduced image by irradiating a hologram-recording material with a reference-light beam so that a reproduction signal-light beam is generated and picking up an image of the reproduction signal-light beam. The ho... | 11/17/2009 |
| 7573623 | Hologram recording method using beam with very large incident angle, hologram reproduction apparatus using holographic reflector and hologram reproduction method using the same, and flat display element apparatus using holographic reflector Disclosed is a hologram recording method using a beam with a very large incident angle, a hologram reproduction apparatus using a holographic reflector, a hologram reproduction method using the same and a flat display element apparatus using a holographic reflector.... | 08/11/2009 |
| 7538920 | Hologram reproduction apparatus and hologram reproduction method A reproduction apparatus is provided which reproduces, from a hologram recording medium on which digital data are recorded as an element hologram formed from interference fringes generated by interference of imaged data of the digital data as object light with refer... | 05/26/2009 |
| 7538921 | Hologram reproducing apparatus A compact and low-cost hologram reproducing apparatus with a simple mechanism is provided. A light source 1 and a lens 11 for generating parallel light are provided on an inner surface of a housing 5. By changing the angle of a biaxially ... | 05/26/2009 |
| 7457018 | Synthesis method for carbon material based on LiMPO Method of synthesis for a material made of particles having a core and a coating and/or being connected to each other by carbon cross-linking, the core of these particles containing at least one compound of formula LixM1-yM′y(XO | 11/25/2008 |
| 7418170 | Optical device and virtual image display device A virtual image display device is provided which displays a two-dimensional image for viewing a virtual image in a magnified form by a virtual optical system. The virtual image display device includes an optical waveguide (13) to guide, by internal total refl... | 08/26/2008 |
| 7400431 | Method for encoding video holograms for holographically reconstructing a scene 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 (3) wit... | 07/15/2008 |
| 7379219 | Method and apparatus for illuminating a computer generated hologram A holographic display comprising a spatial light modulator, SLM, for displaying a computer generated hologram, CGH, containing horizontal or vertical parallax only, HPO, means for illuminating the SLM, and means for guiding light reflected from the SLM to a display ... | 05/27/2008 |
| 7376068 | Nano-scale resolution holographic lens and pickup device An extremely high resolution holographic lens is provided, comprising an interference pattern between light emitted from at least one tiny point source of light such as the tip of an optical fiber, having a diameter in the nanoscale region, and at least one plane or... | 05/20/2008 |
| 7356056 | Coherent light source and control method thereof, and display unit and laser display using them In a display device that displays a video by scanning coherent light across a screen, modulation at high speeds and gradation are necessary for a coherent light source. An oscillation wavelength of a semiconductor laser outputting the fundamental wave is chan... | 04/08/2008 |
| 7317564 | Replay optics for holographic displays A holographic display comprises a spatial light modulator, SLM, arranged to display a set of tiled holographic images, and illuminating means for illuminating a surface of the SLM. Replay means are provided for focusing light reflected from the SLM surface to presen... | 01/08/2008 |
| 7315408 | Video hologram and device for reconstructing video holograms for large objects A video holographic display device operates so that the size of a reconstructed three dimensional scene is a function of the size of the hologram-bearing medium; the reconstructed three dimensional scene can then be anywhere within a volume defined by the hologram-b... | 01/01/2008 |
| 7312908 | 3D image display and 3D image display method A small, inexpensive three-dimensional image display having a structure for displaying a color three-dimensional image sharply even if a low-resolution spatial optical modulating element is used. The three-dimensional image display has an illumination light source u... | 12/25/2007 |
| 7298685 | Method and apparatus for recording to and reading from a multi-layer diffractive optics memory The present invention comprises an apparatus and method for recording information on a multi-layer diffractive optics memory to extend storage capacity. A composite mirror device comprises a plurality of sets of mirror elements. Each one of the mirror elements of th... | 11/20/2007 |
| 7295356 | Method for improved holographic recording using beam apodization An apodization system for achieving a substantially uniform intensity profile of a modulated reference beam on a holographic recording medium. The substantially uniform intensity profile serves to improve the quality of any and all recorded holograms. In high-densit... | 11/13/2007 |
| 7295200 | Computer generated hologram display system A method of displaying a computer generated hologram includes displaying the image as a set of facets that approximated to the true shape of the object to be displayed. Each of these facets is populated with points that together make up the image. The invention prov... | 11/13/2007 |
| 7289255 | Hologram apparatus, positioning method for spatial light modulator and image pickup device, and hologram recording material The present invention provides a hologram apparatus for recording interference fringes formed from reference light and signal light optically spatially modulated by a spatial light modulator on a hologram recording material or picking up an image of reproduction sig... | 10/30/2007 |
| 7289253 | 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 ... | 10/30/2007 |
| 7262889 | System and method for volume holographic imaging using spectral illumination A holographic imaging system is disclosed that includes a spectral electromagnetic field unit for providing a plurality of focal areas of a plurality of wavelengths of electromagnetic fields along a first direction, a lens system for directing the electromagnetic fi... | 08/28/2007 |
| 7259899 | Narrow angle hologram device and method of manufacturing same 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 reflec... | 08/21/2007 |
| 7252394 | Laser projection display and illumination device with MEMS scanning mirror for indoor and outdoor applications A projection display system includes a light source emitting a light beam, and a reflecting mirror system for scanning the light beam over an image to illuminate the image. The light source can be solid state such as a laser diode. The reflecting mirror system can b... | 08/07/2007 |
| 7248389 | Holographic recording and reconstructing apparatus and holographic recording and reconstructing method A holographic recording and reconstructing apparatus includes a laser light source for emitting a laser beam, a beam splitting element for splitting the emitted laser beam into a signal beam and a reference beam, a light modulating element for modulating the signal ... | 07/24/2007 |
| 7245408 | Systems and methods for producing wide field-of-view holographic displays Hologram recording devices and techniques can be employed to produce wide-field-of-view holograms. In one embodiment, a specialized lens is used to couple an object beam into a holographic recording material without substantially changing the angle of incidence of t... | 07/17/2007 |
| 7230747 | Hologram retention method Information recorded as a hologram in a predetermined position of an optical recording medium is reproduced, and subsequently the reproduced information is re-recorded and retained in the same position as the predetermined position as a hologram. Alternatively, info... | 06/12/2007 |
| 7227674 | Active digital hologram display Certain types of holographic recording materials can be used to updateably record holographic stereograms formed when fringe patterns are generated through interference of an object laser beam containing image information with a reference laser beam. In this manner,... | 06/05/2007 |
