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| Number | Title | Issue Date |
| 8149486 | Recording device, recording/reproducing method, and reproducing method A hologram recording and reproduction method is configured such that the number of values which can be implemented per one pixel is increased from two according to a conventional method to three or more to achieve increase of the data recording capacity. While two v... | 04/03/2012 |
| 8035873 | Hologram recording method and hologram recording device using generating light patterns A hologram recording method includes generating light of a pattern in which a plurality of unit blocks, which include at least one pixel and express luminance, are arrayed, the pattern being sectioned into a region of a signal beam and a region of a reference beam, ... | 10/11/2011 |
| 7999984 | Apparatus and method to encode information holographically A method to encode information holographically, wherein the method provides information, and generates a plurality of data images, wherein each data image comprises a portion of the information. The method holographically encodes each of the plurality of data images... | 08/16/2011 |
| 7990594 | Phase mask for holographic data storage The present invention relates to a phase mask for holographic data storage, and to a method and an apparatus for reading from and/or writing to holographic storage media using such a phase mask. According to the invention, the phase mask has a plurality of ph... | 08/02/2011 |
| 7952776 | 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 modulat... | 05/31/2011 |
| 7796312 | Holographic recording method and holographic recording apparatus A holographic recording apparatus 10 realizes multilevel gray-scale recording by: controlling a reflection type spatial light modulator (DMD 18D) via a control unit 24 so that an object beam in an object optical system 18 is reflected in ... | 09/14/2010 |
| 7755820 | Two-dimensional modulation method for hologram recording and hologram apparatus with encoder for driving SLM displaying boundary portion To provide a two-dimensional modulation method for hologram recording which is capable of preventing degradation of reconstructing performance when positional shift occurs and which enables information to be stably recorded or reproduced. The hologram recording carr... | 07/13/2010 |
| 7692835 | Hologram recording apparatus, hologram recording method, and hologram recording medium A recording medium, a recording apparatus, and a recording method. Recording data is recorded as element holograms on a hologram recording medium, a synchronization signal selected from among a plurality of synchronization signals and recording data encoded for ever... | 04/06/2010 |
| 7576899 | Hologram recording device and phase mask having a diffusing pattern with a minimum unit in relation to a minimum unit of a spatial modulator A hologram recording device for recording interference fringes between reference light and signal light modulated by data displayed in a spatial modulator in a hologram recording material, the hologram recording device including a phase mask for diffusing light, the... | 08/18/2009 |
| 7483191 | Holographic recording method, holographic memory reproduction method, holographic recording apparatus, and holographic memory reproduction apparatus A holographic recording and reproduction apparatus has a spatial light modulator for converting digital information to a two-dimensional image and for intensity modulating an object beam based on the two-dimensional image. The spatial light modulator is configured t... | 01/27/2009 |
| 7336577 | Apparatus and method for compensating wobble in holographic digital data storage system A holographic digital data storage apparatus detects a wobbling in a disc shaped storage medium, wherein the apparatus includes a beam generator and finding means, the disc including therein one or more holographically generated patterns. The beam generator projects... | 02/26/2008 |
| 7333252 | Method of writing a composite 1-step hologram A method of writing a single or double parallax composite 1-step hologram is disclosed. Digital data is acquired from a real or virtual object and is described by a luminous intensity tensor. A single mathematical transformation is performed to convert the luminous ... | 02/19/2008 |
| 7324248 | Holographic printer A method and apparatus for producing holograms may use a computer generated 3-D model or data generated using multiple 2-D camera images taken of a real 3-D object or scene. The data is digitally processed and displayed on a high resolution spatial light modulator (... | 01/29/2008 |
| 7310173 | Hologram recording method, hologram recording reproduction method, hologram recording device, hologram recording/reproduction device and hologram reproduction device In the hologram recording and hologram-record reproduction using a one-dimensional optical modulator, the one-dimensional optical modulator where a plurality of light-modulating pixels are arranged modulates a laser beam to record a digital-data signal on a hologram... | 12/18/2007 |
| 7274497 | Holographic recording medium, method for adding address information to same, and method of addressing Provided are a holographic recording medium, a method for adding address information to the holographic recording medium, and a method for addressing that can identify two-dimensional information pages by a simple addressing operation. In the holographic recording m... | 09/25/2007 |
| 7262891 | Holographic printer A single method and apparatus for producing many of the most common types of hologram from digital data is disclosed. In one embodiment the data are generated entirely by a computer as a 3-D (animated) model. In another embodiment the data are generated from multipl... | 08/28/2007 |
| 7262892 | Hologram reconstruction method and device There is provided a hologram reconstruction method including: onto an optical recording medium in which a hologram is recorded by simultaneously irradiating the Fourier transformed signal beam representing a digital data with a bright and dark image and removing a D... | 08/28/2007 |
| 7200096 | Method and apparatus for the modulation of multilevel data arrays A method and apparatus for modulating multilevel data arrays to make them suitable for storage in multidimensional storage media, such as in holographic storage. In order to get a uniform signal of constant energy at the recording plane, first the multilevel data ar... | 04/03/2007 |
| 7193756 | Piezoelectric element, method for fabricating the same, inkjet head, method for fabricating the same, and inkjet recording apparatus A piezoelectric element includes a first electrode film; a piezoelectric layered film including a first piezoelectric thin film formed on the first electrode film and a second piezoelectric thin film formed on the first piezoelectric thin film; and a second electrod... | 03/20/2007 |
| 7179680 | Method for producing an optoelectronic component An optoelectronic component with an optoelectronic transducer is produced with the novel method. The optoelectronic component has a coupling region, which is formed in a radiation-transparent molding of the optoelectronic component. On the base of a clearance of the... | 02/20/2007 |
| 7113464 | Apparatus and method for compensating wobble in holographic digital data storage system A holographic digital data storage apparatus detects a wobbling in a disc shaped storage medium, wherein the apparatus includes a beam generator and finding means, the disc including therein one or more holographically generated patterns. The beam generator projects... | 09/26/2006 |
| 7088482 | Holographic recording techniques using first and second portions of a spatial light modulator The invention is directed to holographic recording techniques that generate a data encoded object beam and a reference beam using a spatial light modulator of the holographic recording system. An input light source, e.g., comprising laser light conditioned by optica... | 08/08/2006 |
| 7088481 | Holographic recording techniques using reference zone of spatial light modulator The invention is directed to holographic recording techniques that generate a data encoded object beam and a reference beam using a spatial light modulator of the holographic recording system. An input light source, e.g., comprising laser light conditioned by optica... | 08/08/2006 |
| 7085028 | Hologram recording apparatus, hologram recording method, and hologram recording medium A hologram recording apparatus, a hologram recording method and a hologram recording medium reduce noise components generated by a phase modulation type spatial light modulator, thus permitting improved integrity of data to be achieved. A light beam whose diffractio... | 08/01/2006 |
| 7050417 | Channel coding/decoding apparatus and method for a CDMA mobile communication system Disclosed is a method for generating (2k−2t) first order Reed-Muller codes from 2k first order Reed-Muller codes based on k input information bits. The method comprises selecting t linearly independent kth order vectors;... | 05/23/2006 |
| 7042605 | Holographic printer The present invention provides a single method and apparatus for producing many of the most common types of hologram from digital data is disclosed. The data are generated entirely by a computer as a 3-D (animated) model or from multiple 2-D camera images taken of a... | 05/09/2006 |
| 7009742 | Holographic printer The present invention provides a single method and apparatus for producing many of the most common types of hologram from digital data is disclosed. The data are generated entirely by a computer as a 3-D (animated) model or from multiple 2-D camera images taken of a... | 03/07/2006 |
| 6956681 | Integrated reading and writing of a hologram with a rotated reference beam polarization A method for monitoring diffraction while recording a hologram includes: generating a source beam; generating a data beam by projecting a first component of the source beam through a data source, the data beam having a first polarization; generating a reference beam... | 10/18/2005 |
| 6930811 | Holographic printer A single method and apparatus for producing many of the most common types of hologram from digital data is disclosed. The data are generated entirely by a computer as a 3-D (animated) model or from multiple 2-D camera images taken of a real 3-D (moving) object or sc... | 08/16/2005 |
| 6924942 | Holographic storage lenses Disclosed are holographic storage systems and lenses for holographic storage systems. The lens units can be of a single-component design. The lenses can be used to both record to photorefractive storage media and to read from photorefractive storage media. ... | 08/02/2005 |
| 6914704 | Obliquity correction system Disclosed are methods of producing obliquity corrected light beams, and holographic recording and retrieval systems that utilize a obliquity corrected reference beam. The obliquity correction is accomplished using off-center lenses. ... | 07/05/2005 |
| 6710901 | Method and apparatus for two-photon, volumetric spatially resolved holographic data storage in photosensitive glass A method for the generation of volume spatially-resolved holographic data storage within a photosensitive glass sample that incurs changes of optical properties in response to two-photon absorption, the method including directing non-ultraviolet pulsed laser radiati... | 03/23/2004 |
| 6646773 | Digital micro-mirror holographic projection The present invention relates to a method and apparatus for display of three-dimensional images and production of mega-channel phase-encoded optical communications. In certain embodiments, the device of the present invention allows for the creation and di... | 11/11/2003 |
| 6414763 | Digital holographic camera system and method having removable media A digital electronic camera includes a holographic medium, an imaging array disposed at a focal plane for converting optical information to digital information; and an optical system configured to store the digital information onto the holographic medium.... | 07/02/2002 |
| 6330088 | 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 comput... | 12/11/2001 |
| 6157473 | Holographic storage system incorporated therein a parabolic mirror A holographic storage system implements both a rotational and an angular multiplexings in combination. The system comprises a light source, a pair of wedge prisms, a beam splitter, a first, a second, a third and a parabolic mirrors, a SLM(spatial light mo... | 12/05/2000 |
| 6072608 | Compact architecture for holographic systems An architecture for holographic data storage and processing integrates multifunctional silicon-based optoelectronic devices, rewritable holographic material, optical devices and other electro-optical elements in compact and high-performance systems. A dyn... | 06/06/2000 |
| 6040930 | Volume holographic storage using rotated signal beam encoder The data encoder (e.g. an amplitude spatial light modulator, ASLM) in a volume holographic storage system is rotated by 45° relative to the normal to the plane of the reference and signal beams, such that the near-Fourier transform pattern of the encoder... | 03/21/2000 |
| 6023355 | Coded-wavelength multiplex volume holography A method for coded-wavelength multiplexing according to which a signal waves Si (r) is recorded in a holographic medium in a counter-propagating geometry using corresponding writing reference waves Ri (r). The method involves selecti... | 02/08/2000 |
| 6005693 | Method for holographic storage The present invention is a method for optical data storage which compensates for deterministic variations. The method comprises writing a two-dimensional image comprising a plurality of pixels into a recording medium while varying the exposure of individu... | 12/21/1999 |
