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7124441 Method and apparatus for securely associating an optically readable memory with a user machine  
A CD-ROM has an obscurable section wherein exists a photosensitive mask material layer or constituent operative to alter the optical properties of areas subjected to prolonged exposure to the...
6608774 Two-photon four-dimensional optical memory  
Selected domains, normally 2×10 3 ×2×10 3 such domains arrayed in a plane, within a three-dimensional (3-D) volume of radiation-sensitive medium, typically 1 cm 3 of spirobenzopyran containing...
6483735 Two-photon, three-or four-dimensional, color radiation memory  
Three-, and four-dimensional (“3-D” and “4-D”) volume radiation memories store multiple binary bits of information—typically about five to ten and more typically eight such bits—in the...
6118685 Optical data processing apparatus and a method of providing an optical data processing apparatus  
It includes: a substrate; a plurality of optical data processing units arranged in an array on the substrate, a super graphite sheet on LEDs of the optical processing units, and a glass substrate...
6084796 Programmable metallization cell structure and method of making same  
A programmable metallization cell ("PMC") comprises a fast ion conductor such as a chalcogenide-metal ion and a plurality of electrodes (e.g., an anode and a cathode) disposed at the surface of the...
6061264 Self-aligned fuse structure and method with anti-reflective coating  
Provided are a self-aligned semiconductor fuse structure, a method of making such a fuse structure, and apparatuses incorporating such a fuse structure. The fuse break point, that point at which...
6026053 Photorefractive read-only optical memory apparatus using phase, frequency, and angular modulation  
The present invention stores and retrieves digital information by altering the phase transmission characteristics of a multiple layer phase recording by modulating the carrier frequency and the...
5926411 Optical random access memory  
An optical memory (10) is disclosed in which data is stored in an optical data layer (19) capable of selectively altering light such as by changeable transmissivity, reflectivity, polarization,...
5828595 Optical recording and playback apparatus and method using single light absorbents  
In a system (apparatus and method) which employs a light absorbent material surrounded by an optically transparent matrix as a recording medium and in which the presence or absence of emission...
5761111 Method and apparatus providing 2-D/3-D optical information storage and retrieval in transparent materials  
Sub-micron-scale, micron-scale and greater than micron-scale, crack-free and regularly-shaped structures of high-contrast refractive index are provided in transparent storage media by controllably...
5581499 Micro information storage system  
A device for optically storing and retrieving information incorporating a cadmium fluoride crystal. Using focused ionizing radiation, patterns can be formed in the crystal by the creation of color...
5499231 Optical disk drive with multiple data layer disk and system for focusing the optical beam  
An optical disk drive with a multiple data layer optical disk uses computed axial velocity values of the data layers to optimize the interlayer transition of the focused light beam. In the...
5440507 Diamond-like carbon write-read optical storage memory  
A method and apparatus for storing data is provided incorporating an amorphous solid having covalent bonds and a first index of refraction and an energy source for thermally heating selected areas...
5361222 Binary phase only filter associative memory  
An associative memory apparatus having a 2f Fourier transform optical correlation configuration wherein the correlation spots produced in the correlation plane are projected back by a mirror...
5325324 Three-dimensional optical memory  
Selected domains, normally 10 3 ×10 3 such domains arrayed in a plane, within a three-dimensional (3-D) volume of active medium, typically 1 cm 3 of spirobenzopyran containing 10 2 such...
5289407 Method for three dimensional optical data storage and retrieval  
In a method of high density (>10 12 bits/cc) optical recording of information in a three-dimensional multilayered format, information is written in a photopolymer as submicron volume elements...
5272667 Optical information recording apparatus for recording optical information in a phase change type optical recording medium and method therefor  
There is disclosed an optical information recording apparatus for recording optical information in a phase change type optical recording medium and a method therefor. The order of the atomic...
5184323 Photorefractive device and process for its use  
A photorefractive device is disclosed capable of optically coupling intersecting beams of electromagnetic radiation comprised of first and second electrodes for establishing a potential gradient...
5160572 Optical memory device and apparatus for manufacturing the same  
An apparatus for manufacturing an optical memory device, which includes supplying rolls for continuously supplying a sheet-like substrate, a masking endless belt having a plurality of windows of...
5001667 Optical storage device  
An optical memory includes a storage for optical data carriers, a means for transferring data carriers from the storage to one or several stations for data recording or reading, a modulated...
4991157 Optical information storage apparatus  
In an optical information storage apparatus including an optical information storing medium having a retrieval index storing area and an information storing area, the apparatus comprises an optical...
4980262 Producing a replicate video disc by a method of photographic contact printing  
A photographic contact printing process is disclosed having application in the mass production of replicate video discs from a master disc, and other applications wherein it is desired to replicate...
4956813 Apparatus for regenerating information from records made by optical-wavelength-multiplexing method  
An apparatus for reproducing information from records made by an optical-wavelength-multiplexing method which includes a first medium acting as a data carrier which data can be recorded on and...
4922462 Reversible memory structure for optical reading and writing and which is capable of erasure  
In a reversible memory system, a pulsed laser beam generated from a laser unit is directed to a recording layer formed on a substrate 1. The recording layer essentially consists of a recording...
4891790 Optical system with an optically addressable plane of optically bistable material elements  
This device is an all-optical digital architecture for carrying out compuions. Residue number system addition and multiplication tables are produced on an optically-addressable plane composed of...
4866696 Pre-formatted moth-eye type optical data storage member and method  
A pre-formatted optical data storage member is described in which format zones are generated by the provision in the surface of the optical medium of a "moth-eye" structure, i.e. regular surface...
4864537 Polymers and dye combinations and methods for their use in optical recording  
A polymer and dye combination suitable for use in optically recording information. The present invention includes a material which may exhibit the property of birefringence under selected...
4855950 Optical storage apparatus including a reversible, doping modulated, multilayer, amorphous element  
An optical memory comprising a doping modulated multilayer made of amorphous semiconductor, and at least two electrodes, one of the electrodes being transparent and the multilayer being sandwiched...
4839861 Information recording medium rewritable by utilizing two metastable phases of a recording layer and method using the same  
A rewritable information recording medium which has a recording layer containing a Group I transition element and a Group IV representative elements of the Periodic Table as two principal element...
4805144 Solid memory medium and information reproduction system using the medium  
A memory medium for information storage and reproduction and an apparatus for reading information from the memory medium are set forth herein. The memory medium includes a solid storage layer...
4774702 Erasable optical memory employing a marmen alloy to effect phase-change erasing in a chalcogenide film  
A portion of a chalcogenide transformation film in a less reflective phase responds to a low energy laser beam writing pulse by transforming to a crystalline phase. A marmem alloy, secured to the...
4757472 Electrophotographic optical memory system  
An optical memory system for storage and retrieval of digital data using a source of writing light in the visible light range and a separate source of near infrared, polarized reading light. The...
4737934 Data storage device and system having an optically non transmissive chalcogenide layer  
Disclosed is an optical data storage device and system, and a method of doing one or more of entering data into, reading data out of, or erasing data from the device. The optical data storage...
4731756 Optical storage and switching devices using organic charge transfer salts  
Optical devices using an organic charge transfer salt as the switching and storage media are disclosed. Generally, a light beam of a given intensity directed to a film of certain organic charge...
4731755 Thermal design for reversible phase change optical storage media  
Reversible phase change storage material is thermally isolated in a storage medium by means of grooves in the substrate and at least one layer of a thermally conductive dielectric material.
4707787 Beam-activated complex-solid formation utilizing pattern-independent, coordinate-sequence construction  
A system and method for forming a model of an underground geological formation is disclosed wherein a quantity of non-solid material of the type which solidifies at volumetric positions impinged...
4663738 High density block oriented solid state optical memories  
A block oriented solid state optical memory having a distributed data storage architecture comprises a lens array including a plurality of laterally separated lenslets which have numerical...
4631706 System for preventing the overwriting of previously optically recorded data and for reading optically recorded data during writing  
An optical file system in which a command to store data results in a write operation in the next available storage position. A single optical path is used for both reading and writing. By dividing...
4586164 Random access memory device utilizing phase change materials  
A random access memory device is disclosed which utilizes phase change materials. The memory device includes two overlapping films of a phase change material which exhibits an optically discernible...
4471470 Method and media for accessing data in three dimensions  
Methods and active media for controlled production and optical access of data in the form of physio-chemical inhomogeneities, such as controlled differences in absorption characteristics of...
4466080 Three-dimensional patterned media  
Method and active media for controlled production of physical and refractive index inhomogenetics in a volume of a suspension medium by use of at least two intersecting beams of electromagnetic...
4463089 Reflective optical data storage and laser recording medium  
An improved reflective silver laser recording and data storage medium for direct read after writing, having a protective gold plating on the silver particles of the reflective surface. The gold...
4460988 Data accessing system for optical disk mass memory  
The invention is a matrixing system, involving optical fibers, for accessing data encoded on an optical disk. Illustratively, a plurality of first fiber bundles couples optical sources to disk...
4449204 Information processing apparatus using a semiconductor laser diode  
An optical information processing apparatus comprises an information recording medium, a semiconductor laser diode for issuing a laser beam and an optical system adapted to direct the issued laser...
4434477 Mechanically addressed optical memory  
An optical memory with a storage plate and an optical write/read unit, with which during a relative movement the storage plate is illuminated pointwise for writing and reading of information, the...
4428069 Apparatus for preformatting an optical disk  
An apparatus for preformatting each track of an optical disk with spaced header patterns using a plurality of overlapping, individually modulated writing laser beams arranged in a line...
4425570 Reversible recording medium and information record  
The invention is a recording medium wherein the light absorptive layer is a granular material comprising domains of a light sensitive material embedded in a dielectric matrix. The domains comprise...
4422159 Optical information storage and retrieval  
A process employing bodies that are fabricated to have a specific configuration are useful for the storage of information such as digital data. In one embodiment a material, such as germanium, is...
4408213 Reinforced bubble recording medium and information record  
The invention is an improved optical recording medium and information record where information is recorded in the form of one or more bubbles in a light absorptive layer and a reinforcement layer...
4402062 Method and apparatus for dielectrophoretic storage and retrieval of information  
The present invention provides a method and apparatus for storing and retrieving information using the phenomenon of dielectrophoresis. First and second materials are contained within a housing,...
Matches 1 - 50 out of 304 1 2 3 4 5 6 7 >