Matches 251 - 300 out of 700 < 1 2 3 4 5 6 7 8 9 10 11 12 13 14 >
Match Document Document Title
6201783 Optical recording medium having substrate of dual transparent layers  
Disclosed is an information recording medium capable of, in the case of recording information signals such as high density information, sufficiently transferring the information signals, and...
6190748 Optical discs  
A method of manufacturing an optical disc master includes preparing the surface of a glass master plate (2) with an adhesion promoter 4. A photoresist layer (6) is coated on the adhesion promoter...
6175548 Optical recording medium and optical recording and reproducing apparatus  
An optical recording medium in which a light transmission layer (12) is formed on an information recording surface (11A) having formed an information recording pit, a laser light with a wavelength...
6169721 Two-disc laminated optical recording medium  
An optical recording medium has a substrate having an annular grooves, a recording layer including an organic coloring matter and formed on the substrate, and a metallic reflection layer. The...
6160787 Multiple layer optical recording medium for use with two different wavelength laser beams  
A double sided (or higher multiple sided) data storing compact disc for optically recorded data has data surfaces that are separated by a thin film of wavelength selective material that passes...
6160788 Data recording medium, recording and reproducing system and residual amount display method  
A CPU can execute, for example, 4-bit processes, a program for data processes has been written in an ROM, and an RAM has memory areas for a work area and a user area of the CPU. Data supplied from...
6160789 Optical data storage disc  
An optical data storage disc having a first component disc formed over one side with a pattern of indentations defining digital data, the indented side of the first component disc being provided...
6160782 Holographic storage medium and reproduction of data therefrom  
A storage medium has at least one diffraction grating. The diffraction grating is formed as a holographic interference fringe pattern. The pattern is formed as it two-dimensionally diffracts an...
6151287 Optical mass storage device, with data recording light-sensitive layer  
An optical mass storage device such as an optical disc is described, which includes a light-sensitive layer (1) with elementary cells distributed over its free recording surface (10), in which data...
6144631 Information recording medium, and readout method and readout apparatus therefor  
An information recording medium comprising a substrate provided with recessed pits or grooves, and at least a metal layer and a light transmitting layer formed on the substrate in this order, or a...
6139933 Optical recording medium comprising a cross-linked buffer layer  
The invention relates to an optical recording medium, in particular to a compact disc, comprising the following layers: a) a transparent substrate with a spiral having an indented or protruding...
6141299 Apparatus and method for reproducing information data of different formats from a multi-layer optical disc  
An apparatus for reproducing signals from a multi-layer disc with a first layer containing recorded high-quality digital audio data and a second layer containing recorded low-quality digital audio...
6137766 Multi-layer disc reproducing apparatus and method  
An apparatus for reproducing a multi-layer disc which has a first layer containing a recorded multi-bit digital signal quantized at a first sampling frequency and a second, layer containing a...
6128273 Optical phase-change disc  
An optical phase-change disc comprises a substrate having thereon a spiral groove or concentric grooves for guiding a focused light beam, and a layer structure including a recording layer and...
6121339 Cationically polymerizable epoxy resins and optical information recording medium made therefrom  
An epoxy resin composition according to the present invention is one initiating cationic polymerization upon irradiation with energy rays. The epoxy resin composition is formed of at least...
6117284 Dual-layer DVD disc, and method and apparatus for making same  
A dual-layer DVD disc that does not require a stamping step (typically, as part of the 2P prior art manufacturing process) during its manufacture. A polycarbonate substrate is molded and coated...
6115353 Optical phase-change disc having a grooved substrate, with the groove having specific wobbled and non-wobbled regions  
An optical phase-change disc comprises a substrate having thereon a spiral groove or concentric grooves for guiding a focused light beam, and a layer structure including a recording layer and...
6108297 Optical disk with a uniform film thickness by having different angles of inclination for the side surfaces of grooves  
An optical disk including a substrate having a circular shape and a recording film on which information is recorded formed on the substrate. The substrate includes grooves formed in a concentric...
6094413 Optical recording systems  
An optical storage system suitable for optical storage and retrieval of information using a storage medium comprising a substrate, an active layer for retention of the data, and an overlying...
6091693 Optical recording medium and optical information storage unit  
An optical recording medium is made up of an optically transparent substrate having a groove and a land which have approximately the same width and are formed spirally or concentrically, where the...
6091697 Optical recording medium having a plurality of recording layers  
6084850 Method for optical data storage and optical data storage media  
In a method for optical data storage with high density, there are employed as the data carrying medium a number of flat, thin memory components in the form of cards or discs. Two or more of the...
6075764 Laser-writable information recording medium with reference track for laser-writing information thereto using edge following  
A laser-writable information storage blank comprises a substantially planar disk made of a material which is susceptible to modification by impingement of laser radiation. The blank medium includes...
6069868 Multiple layer optical disk storing information at a like multiple densities  
A two-layer disk or a three-layer optical disk consisting of two base disks fastened together and capable of low density recording, medium density recording and further high density recording in a...
6066380 Disc medium substrate and disc device  
A molded thermoplastic resin disc substrate specially adapted for use with floating head type recording/reproduction apparatus is provided. The molded disc substrate has surface smoothness...
6063469 Triple substrate optical disk and manufacturing method thereof  
A triple substrate optical disk comprises a center substrate layer, a top substrate layer, a bottom substrate layer, a top adhesion layer bonding the top substrate layer to the center substrate...
6064615 Optical memory element  
An optical memory element (ME) wherein data are written and read by light incident to the memory element constitutes an integral unit crated by a transparent body. The body includes a...
6060143 Optical information carrier  
An optical information carrier is in the form of a composite laminate having a carrier foil. The underside and the top side of the carrier foil are provided with optically effective structures. The...
6058498 Dot code and information recording/reproducing system for recording/reproducing the same  
A long time optical recording and repeated reproduction of multimedia information is possible. Using a printer system or printing process system, on a recording medium such as a sheet, the...
6055223 Optical memory apparatus  
An optical memory element includes a guide track groove portion and address signal pit portion for indicating the address of the guide track groove. The address signal pit portion has a pit width...
6049521 Optical recording medium and method for producing same  
An optical recording medium having a substrate 1 and one or more recording layers 2, 4 formed on the substrate 1. A sufficient volume of the laser light is illuminated on the recording layer 4...
6045888 Optical volume memory  
An optical memory material includes a two-photon storage component which can be written from a first to a second state in response to WRITE light, mixed with a signal component which fluoresces by...
6042921 Optical recording medium and read/write method therefor  
The invention provides a phase charge type optical recording medium comprising on both sides of a recording layer dielectric layers, each containing zinc sulfide and silicon oxide as main...
6040030 Optical recording medium  
A method for recording/reproducing an optical recording medium of phase change type is provided. The method enables a high density recording while increase in the cross erase is suppressed. The...
6038207 Optical disk capable of inhibiting from rental use  
A recording medium and technique which reduces problems relating to copyright, reduces the necessity for collecting an optical disk for, e.g., rental use and enables the optical disk itself to be...
6030581 Laboratory in a disk  
An apparatus is described that includes an optical disk, adapted to be read by an optical reader, comprising a first sector having substantially self-contained assay means for localizing an analyte...
6028836 Optical recording medium for use at short wavelengths and its recording method  
An optical recording medium adapted for high density recording with a light of short wavelength which exhibits excellent jitter properties, and its recording method are provided. The optical...
6026069 Multiplane information storage system and record carrier for use in such a system  
An information storage system is described which comprises a reading device (6) and an optical record carrier (5) having at least two information planes (1, 2, 3). The radiation from the record...
6021109 Optical recording medium  
An optical recording medium having a recording layer with grooves that define recording tracks. The structure of unwritten tracks enable a scanning device to derive a radial tracking error signal...
6018510 Phase change recording medium for allowing a tracking servo control based on a differential phase detection tracking method  
An erasable phase change recording medium includes a transparent substrate, a recording layer of a phase change material provided on the substrate, and a protection layer provided to protect the...
6014364 Optical information recording medium and method of manufacturing  
An optical information recording medium which can be played back by both a playback system for an SD (Super-density Disk) and a playback system for an HDMCD (High Density Multimedia Compact Disk),...
6009070 Multi-layer optical disk having a reflection layer comprising thin metal film and a dielectric  
A double-layer optical disk having characteristics that are less wavelength dependent, allows the use of a pickup comprising a light beam of a different wavelength to read each layer accurately and...
6005837 Disc-shaped information carrier provided with two portions having different read-out speeds  
A disc-shaped information carrier with a substrate and an information layer which includes optically readable elementary marks having a substantially uniform density. The information layer includes...
6005838 Multi-layers optical recording media and system for recording and reproducing information data  
An novel optical information storage media having M information storage decks. Each information storage deck has N information storage layers, and each information storage layer has a pair of...
5989671 Optical recording medium and manufacturing method thereof  
An optical tape including an optical recording layer for permitting information to be optically recorded thereon and a light-reflective magnetic layer. The light-reflective magnetic layer which...
5986997 Updatable optical data storage disc having reduced crosstalk between tracks, and drive for same  
An updatable optical data storage disc for use with a laser includes a substrate and a recording layer. The substrate contains pre-recorded information in the form of concentric or spiral tracks of...
5982737 Optical disk having first design visible from one side of the disk and a second design visible from the other side of the disk  
In an optical disk, a display area is formed between the circumference of a recorded area and the circumference of the maximum area to which a recorded area can be provided. A reflective layer is...
5976638 Optical recording medium comprising a homeotropically oriented liquid crystalline polymer film comprising dichroic dye  
The invention pertains to an optical recording medium comprising a homeotropically oriented liquid crystalline polymer film having a T g between 75-100° C. and a T c between 110-140° C. and...
5978348 Optical recording medium and process for production thereof  
An optical recording medium includes an optical recording layer readable by radiation within a first wavelength band, and first and second visible information layers. The first information region...
5972459 Optical recording medium and optical disk apparatus  
An optical recording medium is provided which achieves a higher recording capacity. This optical recording medium includes a base formed of thermoplastic resin which has a thickness ranging from...
Matches 251 - 300 out of 700 < 1 2 3 4 5 6 7 8 9 10 11 12 13 14 >