Patents
Sitemap › G11 - Information storage › G11B - Information storage based on relative movement between record carrier and transducer › G11B 7 - Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation, reproducing using an optical beam at lower power; Record carriers therefor
Patents for G11B 7 - Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation, reproducing using an optical beam at lower power; Record carriers therefor (102,715)
01/1984
01/04/1984EP0097509A2 Erasable recording medium comprising a dimer acid polyamide resin
01/04/1984EP0097402A1 Optical device
12/1983
12/28/1983EP0097092A1 Method of and optical device for focusing a light beam onto a reference plane of an information carrier
12/28/1983EP0097035A1 Optical disk scanning system
12/28/1983EP0096969A1 Optical memory system having improved positioning and focusing control circuitry
12/28/1983EP0096881A2 Tracking servo circuit for optical disc reproducing device
12/27/1983US4423502 Record carrier having an optically readable information structure
12/27/1983US4423496 Apparatus for reading and/or writing an optically readable information structure
12/27/1983US4423495 Method and apparatus for recording optically an information signal on a record medium along tracks
12/27/1983US4423427 Substrate for optical recording media and information records
12/27/1983US4423426 Beam recording apparatus
12/27/1983US4423137 Photo-optical technioues
12/27/1983US4422904 Method for forming video discs
12/27/1983CA1159307A1 Thermo-optical data writing process and data medium for performing this process
12/22/1983WO1983004463A1 Laser video disc storage and retrieval system
12/21/1983EP0096623A1 Protected optical disc with freely mounted layer bearer
12/21/1983EP0096504A1 Aurous archival record films for digital data storage
12/21/1983EP0096503A2 Heat sensitive film shutter
12/21/1983EP0096502A1 Insular insulated record films for digital data storage using low power write-laser
12/21/1983EP0096501A1 Method for detecting fire
12/21/1983EP0096374A2 Method for optically encoding digital data on a substrate and the data record carrier formed thereby
12/21/1983EP0096164A2 Pulse-width modulation circuit
12/21/1983EP0096109A2 Error correcting system
12/20/1983US4422169 Lens assembly for a video recorder-playback machine
12/20/1983US4422168 Method and apparatus for detecting a focussing condition of an objective lens
12/20/1983US4422159 Optical information storage and retrieval
12/20/1983US4422103 Device for reducing the effect of time base variations in video disc player
12/20/1983CA1159150A1 Video recorder-playback machine
12/20/1983CA1159149A1 Optical device for recording and reading on a data carrier
12/13/1983US4420829 Holographic system for the storage of audio, video and computer data
12/13/1983US4420828 Optical recording and/or reproducing device
12/13/1983US4420827 Disc reproducing system
12/08/1983WO1983004336A1 Insular record films for digital data storage
12/08/1983WO1983004335A1 Aurous archival record films for digital data storage
12/08/1983WO1983004334A1 Gold archival record films for digital data storage using low power write-laser
12/08/1983WO1983004333A1 Insular, insulated record films for digital data storage using low power write-laser
12/08/1983WO1983004332A1 Archival record films for digital data storage using low power write-laser
12/08/1983WO1983004331A1 Optical head control signal generator
12/08/1983WO1983004330A1 Heat-sensitive optical recording medium
12/08/1983WO1983004329A1 Optical disc reproducer
12/07/1983EP0095886A2 Method and apparatus for making a stamping master for video disc replication
12/07/1983EP0095852A1 Focusing control circuitry for an optical memory system
12/07/1983EP0095821A1 Medium for recording optically readable information
12/07/1983EP0095766A1 Servo circuit for a signal reproducing apparatus
12/07/1983EP0095715A2 Extended play videodisc
12/07/1983EP0020745B1 Method of recording data on an optical disc
12/06/1983US4419750 Constant track width optical disk recording
12/06/1983US4419676 Method of recording signals on bands by means of laser beams and apparatus for carrying out the method
12/06/1983US4419614 Apparatus for driving objective lens in tracking direction
12/06/1983CA1158045A1 Recording medium
11/1983
11/29/1983US4418406 Signal wave control circuit
11/29/1983US4418405 Lens positioning controller for optical playback apparatus
11/29/1983US4418365 Video disc transducer system
11/29/1983CA1157948A1 Optically readable information disk
11/29/1983CA1157947A1 Device for pivoting an optical element under electrodynamic control
11/29/1983CA1157946A1 Optically readable digital information disc and manufacturing recording and reproducing apparatus therefore
11/29/1983CA1157945A1 Optically readable disc record
11/29/1983CA1157941A1 Method and apparatus for locating a movable servo controlled member during position signal drop-out
11/29/1983CA1157607A1 Process and apparatus for making video disks
11/24/1983WO1983004134A1 Optical memory system having improved positioning and focusing control circuitry
11/24/1983WO1983004131A1 Focusing control circuitry for an optical memory system
11/23/1983EP0094852A1 Opto-electronic method for reading information from a magnetic disc, and circuit therefor
11/23/1983EP0094678A1 Noise erasing method in radiation image recording and reproducing method
11/23/1983EP0094671A2 Method for data transmission
11/22/1983US4417331 Method for manufacturing an optical disc
11/22/1983US4417330 Optical memory system providing improved focusing control
11/22/1983US4417290 Multi-layer magneto-optical recording medium
11/22/1983US4417285 Stop motion system for playing back a program recorded on a disc-shaped record carrier
11/16/1983EP0094273A1 Manufacturing method for a protected optical disc, and disc obtained by this method
11/15/1983US4416002 Method and apparatus for high-density recording and reproduction
11/15/1983US4415935 Tangential servo control signal generating device for recorded data reproducing device
11/15/1983US4415650 Recording material
11/15/1983US4415621 Use of α,α-bis(dialkylaminobenzylidene) ketone dyes in optical recording elements
11/15/1983US4415138 Elastomeric videodisc mold
11/15/1983CA1157150A1 Permanent thermo-optical memory structure
11/15/1983CA1157149A1 Physically optimized optical disc structure, method and apparatus
11/15/1983CA1156869A1 Imaging film and method
11/09/1983EP0093582A1 Scanning servo system for optical-disc information reproducing apparatus
11/09/1983EP0093427A1 Optical information processor
11/09/1983EP0093228A2 Video disk editing method and system
11/08/1983US4414658 Linear tracking arrangement in a photographic disc type information containing system
11/08/1983US4414657 Moving system for a videodisk reader-recorder
11/08/1983US4414655 Scanning beam control system
11/08/1983US4414584 High-speed playback for videodiscs
11/08/1983US4414273 Thermal recording materials
11/02/1983EP0092997A2 An optical pickup
11/02/1983EP0092842A2 Objective lens drive apparatus
11/02/1983EP0092707A2 Optical storage system employing a novel multi-layer optical medium
11/01/1983US4412743 Off-axis light beam defect detector
10/1983
10/27/1983WO1983003703A1 Optical storage system employing a novel multi-layer optical medium
10/27/1983WO1983003702A1 Optical storage system employing a novel multi-layer optical medium
10/26/1983EP0092420A1 Information storage systems
10/26/1983EP0092325A1 Recording disc
10/26/1983EP0092206A2 Amplifier with broad dynamic range and improved power efficiency
10/26/1983EP0092169A2 Method and apparatus for recovering information from a videodisc
10/26/1983EP0092168A2 Method and apparatus for recovering information from a videodisc
10/26/1983EP0092167A2 Method and apparatus for recovering information from a videodisc
10/26/1983EP0092166A2 Method for recovering information from a videodisc
10/26/1983EP0092165A2 Method and apparatus for recovering information from a videodisc
10/26/1983EP0092113A2 Optical recording medium for use in an optical storage system and method for making such recording medium
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