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7428113 Device for reading from and/or writing to optical recording media  
The present invention relates to a device for reading from and/or writing to optical recording media, having a light source for producing a scanning beam for scanning the optical recording medium,...
7385741 Holographic recording system and optical chopper  
A holographic recording system with a simple structure is provided that can make a holographic recording beam follow a recording medium traveling even at high speed. The holographic recording...
7372602 Method for recording and reproducing holographic data and an apparatus therefor  
A holographic recording and reproducing method for recording data in a holographic recording medium comprising a recording layer in which data are to be recorded as phase information of light by...
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...
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...
7324286 Optical beam steering and switching by optically controlled liquid crystal spatial light modulator with angular magnification by high efficiency PTR Bragg gratings  
Non-mechanical optical beam steering and switching is produced by optically controlled liquid crystal spatial light modulator with angular magnification by high efficiency volume Bragg gratings...
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...
7251066 Holographic memory using beam steering  
A method, apparatus, and system provide the ability for storing holograms at high speed. A single laser diode emits a collimated laser beam to both write to and read from a photorefractice crystal....
7239594 Self-referenced holography using element formed on a holographic medium  
The invention is directed to self-referenced holographic recording techniques that make use of an element of a holographic medium to create a reference beam from a zero frequency Fourier component...
7227675 Hologram recording medium, recording/reproducing apparatus and method therefor  
A hologram recording medium in which data is recorded at a high density, the input of a reference beam to an area to which data is not to be recorded of a recording layer is prevented when...
7209270 Method and apparatus for phase correlation holographic drive  
A holographic storage apparatus for recording data in a holographic medium includes at least one light source for generating a reference beam and a signal beam. The reference beam is preferably a...
7180644 Holographic storage lenses  
Disclosed are holographic storage systems and lenses for holographic storage systems. The lens units can be of a two-component design. The lenses can be used to both record to photorefractive...
7154646 Optical recording apparatus and optical recording/reproducing apparatus  
An optical recording/reproducing apparatus having excellent resistance against vibration and noise. In recording, coherent light is polarization-modulated with a spatial light modulator to generate...
7154645 Holographic recording method and apparatus  
A holographic recording method and a holographic recording apparatus capable of selectively rewriting or erasing only desired data without degrading data other than the desired data are provided....
7149015 Obliquity correction scanning using a prism mirror  
Disclosed are optical systems and methods of producing obliquity corrected light beams, for example, holographic recording and retrieval systems that utilize an obliquity corrected reference beam....
7149014 Holographic memory using beam steering  
A method, apparatus, and system provide the ability for storing holograms at high speed. A single laser diode emits a collimated laser beam to both write to and read from a photorefractice crystal....
7136206 Method and apparatus for implementing a multi-channel tunable filter  
The present invention provides a multi-channel tunable filter and methods for making such a filter. In one embodiment, the filter comprises a bank of gratings imprinted into a filter material, such...
7126729 Double hologram  
The invention relates to a method of providing an article with identifying information, in which a hologram is provided from which at least first and second hologram patterns separated physically...
7099058 Hologram preparing method  
In the method for producing holograms, a plurality of images displayed on a spatial optical modulating element 6 is used as the object light. Through a lens array 7 composed of a plurality of...
7088488 Spatial light modulator device with diffusive element  
The invention is directed to a spatial light modulator device that can improve holographic data recording systems, and various methods and systems incorporating the device. The spatial light...
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...
7085026 Apparatus and method for recording and reproducing optical information  
The present invention makes it possible to reduce the size of an optical system for multiplex recording or reproduction of information utilizing holography. A pick-up of an optical information...
7023593 Apparatus for forming nano-grating device  
An apparatus for forming a nano grating device to film nano-scale interference fringes by holography in order to makes a nano-scale meshed structure is disclosed. A beam emitted form a light source...
7019917 Lens barrel  
A lens barrel includes an optical system including a short focal length for a wide angle of view; and an ND filter in the shape of a disc which is provided on an optical axis of the optical system....
7019874 Holographic memory system including a photodetecting device provided with a band-pass filter  
A holographic memory system includes a light source for generating a reference beam having a wavelength; and a photodetecting device for selectively detecting a reconstructed signal beam...
7012722 Holographic recording apparatus  
A holographic recording apparatus which can stably record data to be recorded onto a recording medium. The holographic recording apparatus of the present invention includes: a light source for...
6980337 Apparatus and method for recording digital data on a holographic storage system  
A holographic apparatus includes a mask for modulating a signal beam to generate a modulated signal beam; a conical prism, which has a cone portion and a base portion, for refracting a reference...
6961161 Holographic recording and reproducing apparatus  
An image detected by a CCD image sensor 108 when only a non-modulated signal light is applied to a holographic memory 120 in which data is not recorded is ensured as a noise pattern. When data...
6909529 Method and apparatus for phase correlation holographic drive  
A holographic storage apparatus for recording data in a holographic medium includes at least one light source for generating a reference beam and a signal beam. The reference beam is preferably a...
6903851 Method for producing light scattering elements  
The present invention relates to a method for producing light-scattering elements by holographic illumination of a layer ( 10 ) of a photo-sensitive material on a support plate ( 1 ) and subsequent...
6894815 Reference beam absorbers-blockers  
In accordance with teachings of the present invention, a device accomplishes the task of reducing or preventing reflections of the reference beam off a diffuser from striking the holographic...
6885510 Holographic storage lenses  
Disclosed are holographic storage systems and lenses for holographic storage systems. The lens units can be of a two-component design. The lenses can be used to both record to photorefractive...
6870651 Apparatus and method for generating a dynamic image  
Apparatus for generating a dynamic image includes a laser light source for generating a coherent beam of light; optics for separating the light beam into a reference beam and an object beam; a...
6865002 Image exposure-recording device and image exposure-recording method  
An image exposure recorder for exposure-recording a holographic stereogram image or a hologram image on a recording medium for hologram. The recorder has an inverse correction system for rotating...
6842273 HOLOGRAM RECORDING METHOD USING BEAM WITH VERY LARGE INCIDENT ANGLE, HOLOGRAM REPRODUCTION APPARATUS USING HOLOGRAPHIC REFLECTOR AND SOLOGRAM REPRODUCTION METHOD USING THE SAME, AND FLAT DISPLAY ELEMENT APPARATUS USING HOLOGRAPHIC REFLECTOR  
A hologram recording method using a beam with a very large incident angle includes the steps of generating a sheet beam as the reference beam, and introducing the reference beam into the recording...
6823113 Grating interference device with adjustable resolution  
A grating interference device with adjustable resolution has high stability and precision adjustment functions. The invention has two reflectors and a beam splitter. One of the reflector is...
6775037 Grating matrix recording system  
A dot matrix system, which uses an electronic display panel as a diffractive optical device to produce two laser beams. The interference pattern of these two beams, at the focal plane of a lens,...
6762865 Self-referenced holography using diffusive element  
The invention is directed to self-referenced holographic recording techniques that make use of a diffusive element. Self-referenced holography refers to holographic recording techniques in which a...
6747770 Holographic stereogram exposure apparatus, method thereof, and holographic stereogram generation system  
An illuminating optical system 36 evenly spreads an object beam L 3 split from a beam splitter 34. When a control computer sends a number of images in the parallax direction, a spatial light...
6738170 Image-reproducing apparatus and image-reproducing method  
An optical member 7 is bonded, at its rear side 7 b , to a holographic stereogram 6 . The front side 7 a of the optical member 7 consists of parallel triangular prisms. Illumination light ...
6706451 Switchable volume hologram materials and devices  
A new photopolymerizable material allows single-step, fast recording of volume holograms with properties that can be electrically controlled. Polymer-dispersed liquid crystals (PDLCs) in accordance...
6674555 Method and apparatus for holographic data storage  
Apparatus for holographic recording of information includes a lens or lens system, referred to here as the “FT lens,” situated in such a way that light from an object beam enters the FT lens...
6674554 Apparatus for making holograms including images of particular sizes  
A method and apparatus for making holograms includes a technique for exposing a film substrate or other light-sensitive medium to consecutive two dimensional images, together representative of a...
6618175 Holographic stereogram preparation apparatus  
A bright holographic stereograin having a high diffraction efficiency can be prepared by restricting vibrations. The apparatus comprises: an optical system 15 for letting an objective laser L 2 ...
6597478 Phase-conjugate holographic data storage device using a multifocal lens and data storage method thereof  
A phase-conjugate holographic data storage device capable of enhancing the characteristics of recording and reproducing data by using a focusing lens is provided. The holographic data storage...
6509983 System and method for adjusting recording laser beam polarization  
Systems and methods for adjusting the polarization of one or more recording laser beams can correct (in whole or in part) for the changes in the polarization of the recording laser beam(s) caused...
6449067 Cartridge for hologram-image recording medium and cartridge including braking mechanism  
A cartridge for holding a hologram-image recording medium for use with a hologram-image recording apparatus, including locating means for properly positioning said cartridge, for sequentially...
6441930 Method and apparatus for making holograms including a diffuser shiftable in its own plane  
A method and apparatus for making holograms includes a technique for exposing a film substrate or other light-sensitive medium to consecutive two dimensional images, together representative of a...
6414764 Ring interferometer configuration for writing gratings  
A method and apparatus is disclosed for creating a structure, such as a grating ( 45 ) in a photosensitive material ( 40 ). The method and apparatus relies upon creating at least two coherent beams...
6382798 Optical device for projection display system  
An optical device for projection display system comprising: a LCD projector, a luminescent spot projector for forming a luminescent spot on a screen, a luminescent spot extracting means for...
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