|
Match
|
Document |
Document Title |
|
|
7365656 |
Data identification method and apparatus
Disclosed herein is a data identification method for identifying, from within a readout signal from a recording medium on or in which user data of k bits are recorded using a recording modulation...
|
|
|
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...
|
|
|
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...
|
|
|
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...
|
|
|
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...
|
|
|
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...
|
|
|
7245407 |
Complex objective lens compatible with information media of different thicknesses
A complex objective lens composed of a hologram and an objective lens, capable of realizing stable and high-precision compatible reproducing/recording of a BD with a base thickness of about 0.1 mm...
|
|
|
7206106 |
Holographic ROM reader having servo control
A holographic ROM reader having a servo control is disclosed. The holographic ROM reader includes an objective lens for focusing light reflected from a storage medium, a pinhole plate provided with...
|
|
|
7193757 |
Angle multiplexing holographic storage device and method
In an angle multiplexing holographic storage device, a movable beam splitter is used for splitting a source beam into an object beam and a reference beam. An encoding device is used for encoding...
|
|
|
7167286 |
Polytopic multiplex holography
Disclosed is a multiplexing method and apparatus that allows holograms to be spatially multiplexed with partial spatial overlap between neighboring stacks of holograms. Each individual stack can...
|
|
|
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....
|
|
|
7092133 |
Polytopic multiplex holography
Disclosed is a multiplexing method and apparatus that allows holograms to be spatially multiplexed with partial spatial overlap between neighboring stacks of holograms. Each individual stack can...
|
|
|
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...
|
|
|
6972982 |
Ring-shaped prism of a holographic ROM system
A holographic system for storing data on an interference pattern in a hologram storage medium includes a light source for emitting a laser beam, a beam splitter, modulating means and a refractive...
|
|
|
6906835 |
Doped stoichiometric lithium niobate crystals and method for high-speed holographic data storage
The present invention discloses a recording medium comprising an improved doped Stoichiometric Lithium Niobate (SLN) crystal for high-speed holographic data storage. The improved doped SLN has an...
|
|
|
6903853 |
Optical head and hologram recording device including the same
An optical head comprises an integrated unit for recording and reproducing page data on a reflective recording medium, wherein the integrated unit includes recording and reproducing units each...
|
|
|
6894816 |
Method and apparatus for recording/reproducing optical information
In a holographic digital data storage system, holographic page data has at least two concentric patterns with the optical information arranged within an outermost pattern of at least two concentric...
|
|
|
6798547 |
Process for holographic multiplexing
A method of recording holograms includes: generating a first signal-beam from a signal-beam source and a first reference beam from a reference-beam source; recording a first hologram in a...
|
|
|
6781725 |
Confocal holographic optical storage with non-overlapping records
The present invention relates to a method and a system for the storage of data in the form of volume holograms which do not mutually overlap. The storage medium consists of a high-sensitive...
|
|
|
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...
|
|
|
6721076 |
System and method for reflective holographic storage with associated multiplexing techniques
A method and system of recording successive holograms in a recording medium including a reflective substrate layer, a polarization shifting layer, and a photorecording medium layer is presented. A...
|
|
|
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...
|
|
|
6697180 |
Rotation correlation multiplex holography
Holography in which an array of overlapping holograms is recorded or reconstructed in a recording medium, holograms being produced by interference of a reference beam and a signal beam, in which...
|
|
|
6697316 |
Compensation of pixel misregistration in volume holographic data storage
A method of correcting errors arising from interpixel cross talk in the detection of a reconstructed holographic data image includes determining any misregistration between the pixels and the bit...
|
|
|
6661725 |
Apparatus for storing/restoring holographic data and method for coding/decoding holographic data
There is provided an apparatus for storing/restoring holographic data and a method for coding/decoding holographic data. In a recording mode, the apparatus divides input data into a plurality of...
|
|
|
6614566 |
Process for holography involving skip-sorted hologram storage
The invention relates to a skip-sorted spatial multiplexing holographic storage technique that addresses the problems of cross-talk, image distortions, and physical change of the medium encountered...
|
|
|
6512606 |
Optical storage media and method for optical data storage via local changes in reflectivity of a format grating
An optical data storage system and method comprising a photopolymer medium having generally a polymerizable monomer, an active binder, a first, hologram recording polymerization initiator, and a...
|
|
|
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...
|
|
|
6388779 |
Process for holography involving tilt compensation
The invention involves a holographic system containing a photopolymer-type storage medium located in the system's optical path, where the medium is rotated around a first axis such that the surface...
|
|
|
6347060 |
Hologram observation method and hologram observation apparatus and multi-dimensional hologram data processing method and multi-dimensional hologram data processing apparatus
Scanning sensor scans on a circumference and simultaneously a radiation wave is received by scanning sensor to generate received signal S m (f). A radiation wave is received by a fixed sensor at a...
|
|
|
6331904 |
Reflection optics reference beam telescope
A reference beam telescope, which is also referred to as a relay imaging system for a reference beam, using reflection optics is disclosed. The relay imaging system according to the present...
|
|
|
6327171 |
Digital signal recording/reproducing method
Digital signal sequences to be recorded in predetermined unitary recording areas are transformed into blocks, a plurality of bit data carrying all digit levels to be read and determined upon...
|
|
|
6274279 |
Preparations of bacteriorhodopsin variants having increased memory time, and their use
Compositions of bacteriorhodopsin variants with increased memory time and their use for reversible optical information recording are disclosed. The compositions are characterized in that the...
|
|
|
6246495 |
Phase-shift digital holographic apparatus
A phase-shift digital holographic apparatus shifts the phase of a reference wave by a phase shifting means, produces holographic image data by a holographic image pickup means having an image...
|
|
|
6226415 |
Noise reduction in volume holographic memories
A method for improving the quality of holographic images by reducing local noise in a holographic memory system is disclosed. The method is characterized by: storing a white reference image and a...
|
|
|
6226109 |
Diffractive security device on compact discs
This invention relates to marking the genuine CD in an easily detectable way while difficult to counterfeit. The improved CD has within its layers a second structured surface parallel to the flat...
|
|
|
6222755 |
Solid state holographic memory
A method and a compact apparatus to read shift-multiplexed holograms on a storage medium without the need for any lenses, and without the need for moving the storage medium. The shift-multiplexed...
|
|
|
6178019 |
System and method for controlling the selectivity of a holographic memory system
A system and method for controlling the selectivity function in a holographic memory system that permits more rapid location and retrieval of holographically stored data. The system and method...
|
|
|
6157470 |
Non-volatile holographic storage in doubly-doped photorefractive material
A non-volatile holographic recording method and system based on a doubly-doped photorefractive material. One embodiment of the holographic material is doped to have first and second types of...
|
|
|
6122081 |
Using the Talbot Effect for lensless imaging of periodic structures in a holographic memory system
A holographic memory system which utilizes the Talbot Effect for the lensless, near-field propagation of repeating image planes of periodic structures. Periodic phase structures at one plane in a...
|
|
|
6108110 |
Optical relay for pixel-based holographic storage and retrieval
A holographic storage and retrieval system for use in co-propagating or counter-propagating geometries having a common optical relay for guiding a signal beam and a reference beam along a common...
|
|
|
6104511 |
Reflector-based off-axis optical system for holographic storage
The holographic storage and retrieval system according to the present invention comprises one convex reflector and one concave reflector having the same optical axis. The reflective surfaces of the...
|
|
|
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...
|
|
|
6064586 |
Method for holographic data storage and retrieval
A method for holographic data storage comprises the step of formatting a page with calibration marks as well as data patterns representing data. The page is then stored in a holographic storage...
|
|
|
6061154 |
System and method for steering focal plane data to access data locations in a holographic memory
Systems and methods for steering a complex, spatially-modulated incident beam of coherent light to gain access to data locations in a holographic memory cell (HMC). One of the systems includes: (1)...
|
|
|
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,...
|
|
|
6018402 |
Apparatus and method for phase-encoding off-axis spatial light modulators within holographic data systems
Embodiments of the invention include an off-axis amplitude and phase encoding optical system, apparatus and method of storage in which a holographic optical element (HOE) is used advantageously to...
|
|
|
5995251 |
Apparatus for holographic data storage
A holographic data storage apparatus having no readout lens. The apparatus has a spatial light modulator (SLM), a focusing element such as a lens, a holographic data storage material and a spatial...
|
|
|
5978112 |
Non-volatile readout of shift multiplexed holograms
The present invention is a holographic reconstruction device for reconstructing successive holograms previously recorded by a recording reference beam in a recording medium, each previously...
|
|
|
5978108 |
Two-step gated holographic recording in photorefractive materials using cw lasers
Ferroelectric materials are disclosed as reversible holographic recording media (25) for use in two-photon recording systems. The ferroelectric materials disclosed herein provide long-lived...
|