| Patent application number | Description | Published |
|---|
| 20080199782 | Hologram recording material, hologram recording medium and hologram recording method - A hologram recording material contains a molecule having intrinsic birefringence and a photoresponsive macromolecule represented by the following formula (1). | 08-21-2008 |
| 20080267038 | OPTICAL DEVICE FOR HOLOGRAPHIC RECORDING OR READING AND METHOD FOR CONTROLLING THE SAME - An optical device for holographic recording or reading is provided and includes: a light emission unit that emits light to be irradiated on an optical recording medium, the light being recording or reading light; a first prism unit that moves in accordance with a moving speed of the optical recording medium and refracts the light to move the light irradiated on the optical recording medium over a distance in a moving direction of the optical recording medium so that the light is irradiated on substantially the same position on the optical recording medium for a period of time; and a second prism unit that moves in accordance with the moving speed of the first prism unit to compensate for an optical path length of the light. | 10-30-2008 |
| 20090003180 | HOLOGRAPHIC RECORDING APPARATUS, HOLOGRAPHIC REPRODUCING APPARATUS, HOLOGRAPHIC RECORDING METHOD AND HOLOGRAPHIC REPRODUCING METHOD - A holographic recording apparatus is provided and includes: a signal light generation section that generates signal light modulated according to digital data; a reference light generation section that generates reference light modulated by means of a pixel pitch; a adding section that adds, in proximity to a light-convergence position where the signal light and the reference light come close to each other or overlap each other, a low-order component of the signal light obtained by Fourier transform and a high-order component of the reference light obtained by Fourier transform, the high-order component of the reference light having a spatial frequency region differing from that of the low-order component of the signal light; and an illumination optical system that irradiate an optical recording medium with the added signal and reference light. | 01-01-2009 |
| 20090168631 | OPTICAL RECORDING DEVICE AND OPTICAL RECORDING METHOD - An optical recording device includes a light source, a light-converging optical system, a moving unit, detection unit, and an acquisition unit. In the optical recording device, interference fringes from a recording light are shift multi-recorded as a plurality of pages of holograms within each of a plurality of planes corresponding to a plurality of convergence positions based on light exposure amount of each page, acquired by the acquisition unit, for each of the convergence positions. | 07-02-2009 |
| 20090213718 | OPTICAL RECORDING DEVICE AND OPTICAL RECORDING AND REPRODUCTION DEVICE - An optical recording device includes a light source, a spatial light modulator, a correcting optical system and a light guiding section. The spatial light modulator includes plural pixels, a signal light region that displays a signal light pattern, and a reference light region that displays a reference light pattern. The spatial light modulator modulates and outputs incident light for each pixel in accordance with a display pattern. The correcting optical system includes a pair of axicon lenses that correct the emitted light from the light source so as to flatten the light intensity distribution thereof on an irradiated surface of the spatial light modulator. The light guiding section guides the corrected light to the spatial light modulator. The signal light and the reference light are irradiated onto an optical recording medium simultaneously and a hologram is recorded into the optical recording medium. | 08-27-2009 |
| 20090231650 | OPTICAL REPRODUCTION DEVICE, OPTICAL RECORDING/REPRODUCTION DEVICE, AND OPTICAL REPRODUCTION METHOD - There is provided an optical reproduction device that reproduces a hologram that is recorded on an optical recording medium by interference between a signal light and a reference light coaxial to the signal light. The device has: a coherent light source; a light distribution unit distributing light from the light source, to a signal light optical path and a reference light optical path; a spatial light modulator that includes a signal light region and a reference light region, a spatial light modulator, a first irradiation optical system spatially separating light distributed to the reference light optical path and light distributed to the signal light optical path, making optical axes of both lights coincide, and irradiating the both lights onto the spatial light modulator; and a second irradiation optical system irradiating reference light onto the optical recording medium as reading light, and reproducing the hologram. | 09-17-2009 |
| 20100238531 | LIGHT-COLLECTING DEVICE, LIGHT-COLLECTING DEVICE ARRAY, EXPOSURE DEVICE AND IMAGE-FORMING APPARATUS - 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. | 09-23-2010 |
| 20100259592 | EXPOSURE DEVICE AND IMAGE FORMING APPARATUS - There is provided an exposure device including: a light-emitting element array having an elongated support and plural light-emitting elements, the light-emitting elements being arranged in at least one row along a length direction of the support such that a spacing between two adjacent light-emitting elements is a pre-specified first spacing; and a hologram element array having a hologram recording layer disposed on the support and plural hologram elements formed, the plural hologram elements corresponding with each of the light-emitting elements and being formed such that a spacing along the support length direction between two adjacent hologram elements is the first spacing, and a diameter in the support length direction of each of the plural hologram elements being larger than the first spacing, such that a respective light emitted from each of the light-emitting elements is diffracted and focused toward a pre-specified image-forming plane by the corresponding hologram element. | 10-14-2010 |
| 20100259739 | EXPOSURE DEVICE AND IMAGE FORMING DEVICE - There is provided an exposure device including: a light-emitting element array at which a plurality of light-emitting elements, that emit light that passes through an optical path of diffused light, are arrayed one-dimensionally or two-dimensionally on a substrate; and a hologram element array at which a plurality of hologram elements are formed at positions, that respectively correspond to the plurality of light-emitting elements, of a hologram recording layer disposed on the substrate, so as to diffract and collect, at an outer side of illumination regions of all of the plurality of light-emitting elements, respective lights that are emitted from the plurality of light-emitting elements respectively. | 10-14-2010 |
| 20110013156 | EXPOSURE APPARATUS, IMAGE FORMING APPARATUS, AND HOLOGRAM RECORDING APPARATUS - An exposure apparatus according to an exemplary embodiment of the invention includes a substrate in which plural light-emitting devices are arrayed one-dimensionally or two-dimensionally; and a hologram recording layer that is disposed on the substrate, plural holograms being recorded in the hologram recording layer by holographic interference between a first beam and a second beam such that a predetermined number of beam spots are disposed in the hologram recording layer in a predetermined array direction according to a portion of light-emitting devices, the portion of light-emitting devices being selected as emitters from the plural light-emitting devices, the beam spot being formed by a light beam of the second beam, the first beam passing through an optical path of diffusion light that passes through the emitter, the second beam passing through an optical path of convergent light that converges at a predetermined distance outside the optical path of the first beam. | 01-20-2011 |
