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| Number | Title | Issue Date |
| 8049942 | Multiplexed holographic recording apparatus and method and holographic reproduction apparatus and method A multiplexed holographic recording apparatus 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 t... | 11/01/2011 |
| 7936491 | Hologram recording medium, hologram recording apparatus and method, and computer program A hologram recording apparatus (300) is provided with: a recording device (100) for recording record information into a hologram recording medium (1); a measuring device (325) for measuring a time elapsed from when the recording of the re... | 05/03/2011 |
| 7920311 | Holographic storage medium and method and apparatus for recording and/or reproducing data to and/or from a holographic storage medium A method and apparatus for recording and/or reproducing data to and/or from a holographic storage medium and a holographic storage medium therefor are provided. The method of reproducing data from the holographic storage medium, in which a hologram containing data i... | 04/05/2011 |
| 7869106 | Holographic recording method, holographic recording apparatus, holographic recording and reproducing method, holographic recording and reproducing apparatus, and holographic recording medium A holographic recording method, a holographic recording apparatus, a holographic recording and reproducing method, a holographic recording and reproducing apparatus, and a holographic recording medium for recording information in an angle multiplex fashion as a holo... | 01/11/2011 |
| 7813017 | Method and system for increasing holographic data storage capacity using irradiance-tailoring element A method and system is disclosed for increasing the holographic storage capacity of a holographic recording medium using an irradiance-tailoring (e.g., optical) element by changing the irradiance profile of the modulated object beam (e.g., by imparting motion to an ... | 10/12/2010 |
| 7808687 | Hologram reconstructing apparatus and hologram reconstructing method A hologram reconstructing apparatus is disclosed. The apparatus includes: unnecessary light removing means for causing the imaging means to receive necessary light only included in the reconstruction light; driving means for operating the hologram recording medium o... | 10/05/2010 |
| 7791779 | Hologram recording apparatus, hologram recording medium and hologram recording method A hologram recording apparatus that records a hologram on a recording layer of a hologram recording medium by causing interference between signal light modulated in accordance with record data and reference light from the same light source as that of the signal ligh... | 09/07/2010 |
| 7787165 | High density, high bandwidth multilevel holographic memory A holographic memory system and apparatus, and a method provide the ability to store multibit holograms in a photorefractive crystal. A single laser diode is configured to emit a collimated laser beam to both write a page of multibit data to and read the page of mul... | 08/31/2010 |
| 7760408 | 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 ... | 07/20/2010 |
| 7715073 | Hologram recorder A hologram recorder is provided, in which coherent light from a light source is split into a signal beam and a reference beam, and the signal beam is modulated by a spatial light modulator to be directed to a hologram recording medium, while the reference beam is di... | 05/11/2010 |
| 7715074 | Holographic recording device A holographic recorder can vary the optical distance between an object lens and a relay lens near the object lens. This arrangement allows defocus-multiplexing utilizing state variations in the laser beam when the beam reaches a storage medium. ... | 05/11/2010 |
| 7636185 | Hologram recording device and hologram recording method A hologram recorder records a hologram in a hologram recording medium by interference of a recording beam irradiated at a predetermined incident angle to the medium via a spatial light modulator incliningly in a predetermined direction with a reference beam irradiat... | 12/22/2009 |
| 7633660 | Hologram recording apparatus and method A hologram recording apparatus includes a laser light source for emitting laser light, a light splitter for splitting the laser light emitted from the laser light source into a signal beam and a reference beam, a light modulator for modulating the signal beam split ... | 12/15/2009 |
| 7589877 | Short stack recording in holographic memory systems 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 a... | 09/15/2009 |
| 7589876 | Holographic memory reproduction method and apparatus A method and apparatus for performing reproduction position servo-control without reducing the recording capacity of a holographic recording medium. Upon the reproduction of a holographic recording medium 18, part of a reproduction beam serving as a servo bea... | 09/15/2009 |
| 7583424 | Hologram information reproducing device A hologram information reproducing device is described which can reproduce information from a recording medium on which hologram information is recorded, and which can be downsized. In one aspect, when light from a light source is emitted, the light is converted int... | 09/01/2009 |
| 7557971 | System and method for managing multiple write sessions to holographic storage media A holographic storage system records digital data to a holographic recording medium at recording locations that are strategically left open. A controller determines whether or not a predetermined event has occurred or a predetermined condition is present. If either ... | 07/07/2009 |
| 7532373 | Holographic recording method, holographic recording apparatus, holographic memory reproducing method, holographic memory reproducing apparatus, holographic recording and reproducing apparatus, and holographic recording medium The pitch of light beam spots on a light receiving surface of an address detector upon search of information recorded on a holographic recording medium is decreased to reduce a distance between the holographic recording medium and the address detector. In a holograp... | 05/12/2009 |
| 7480084 | Holographic filter with a wide angular field of view and a narrow spectral bandwidth A holographic optical filter that includes an optical recording medium for storing several multiplexed reflection holograms that are formed by successive interference between two or more collimated object beams with a common collimated reference beam. The object bea... | 01/20/2009 |
| 7443553 | Holographic sensors and their production 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. ... | 10/28/2008 |
| 7388695 | Data storage devices and methods 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 volume... | 06/17/2008 |
| 7382508 | Holographic recording medium and writing method therefor A holographic recording medium having a recording layer on which holograms are formed by interference between an object beam and a reference beam to thereby record information. The recording layer is formed with a plurality of hologram groups each composed of a plur... | 06/03/2008 |
| 7367705 | Long curved wedges in an optical film The invention relates to a light redirecting polymeric film comprising a plurality of polymeric individual optical elements wherein the elements comprise curved wedge shaped features in the plane of the film, having a length in the range of 800 to 4000 micrometers. | 05/06/2008 |
| 7362482 | Inline type speckle multiplexed hologram recording apparatus and inline type speckle multiplexed hologram recording method An inline type speckle multiplexed hologram recording apparatus and method is disclosed which can condense signal light and reference light in a sufficiently overlapping relationship with each other on a hologram recording medium without using a lens having a large ... | 04/22/2008 |
| 7362687 | Method and device for holographic recording A holographic recording method for recording information as phase information of light by projecting a signal beam and a reference beam onto a recording medium, wherein an X direction is defined as the direction of a line of intersection between a plane including th... | 04/22/2008 |
| 7342697 | Hologram recording medium A hologram recording medium includes a hologram recording layer and a transparent substrate layer stacked on the hologram recording layer. The recording layer records an interference pattern of a recording beam and a reference beam. The transparent substrate layer h... | 03/11/2008 |
| 7339711 | Angle-multiplexing hologram recording device, method, hologram reproduction device, and method A hologram recording apparatus (100) includes a record angle change device (19) capable of relatively changing the record angle of a hologram recording medium (200) relative to signal light (L3) and reference light (L2); and a cont... | 03/04/2008 |
| 7333253 | Multiplex recording type hologram recording device, method, hologram reproduction device, and method A hologram record apparatus (100) includes a parameter set device (19), a move device (20), and a control device (18). The parameter set device (19) modifies parameters for multiple recordings such as a record angle and a focal dep... | 02/19/2008 |
| 7326500 | Sensitization of photo-thermo-refractive glass to visible radiation by two-step illumination Photo-thermo-refractive (PTR) glass is a multi-component silicate glass having photosensitivity in rear UV region. A novel process is disclosed for PTR glass sensitization to visible region by means of two-step illumination followed by thermal development. This disc... | 02/05/2008 |
| 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 |
| 7307769 | Hologram recording medium, recording/reproducing method and recording/reproducing apparatus A hologram recording medium is for recording or reproducing information with light irradiated thereto. The medium has a recording layer made of a photo-sensitive material, a reflective layer disposed on the opposite side of the recording layer from a light irradiate... | 12/11/2007 |
| 7283286 | Hologram recording/reproducing device and optical unit A hologram recording/reproducing device includes a laser light source emitting laser light; a spatial light modulator generating signal light and reference light from the laser light emitted from the laser light source, the signal light and the reference light trave... | 10/16/2007 |
| 7277208 | Hologram recording medium, hologram recording and reproduction apparatus and method of producing a hologram recording medium A hologram recording medium is provided which can prevent sensitization of a region thereof other than a data recording region thereby to prevent deterioration of a characteristic of the hologram recording medium. The hologram recording medium includes partition mem... | 10/02/2007 |
| 7277211 | Hologram recording and reproduction apparatus, hologram recording and reproduction method and hologram recording medium An apparatus and method is disclosed wherein, even if the multiplicity in multiplexing of recording data is increased, positioning of data upon reproduction can be performed with a high degree of accuracy without decreasing the recording capacity. Interference fring... | 10/02/2007 |
| 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 |
| 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 |
| 7262893 | Data read/write device for holographic WORM and method thereof A data writing and reading device is capable of writing and reading data with respect to a holographic storage medium. The data writing and reading device includes a light source which emits a laser beam, a focusing lens unit having a multi-focal lens which splits t... | 08/28/2007 |
| 7259898 | Direct view LC display A display is provided having first and second direct view modes of operation. The display comprises a liquid crystal display panel and a backlight which is illuminated during the first mode so that the displayed image is visible throughout an extended viewing region... | 08/21/2007 |
| 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 |
