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)
12/1987
12/08/1987US4712218 Method of and apparatus for driving semiconductor laser
12/08/1987US4712207 Apparatus for erasing information on a reversible optical recording medium
12/08/1987US4712206 Tracking error signal detecting device with a two-beam system for use in an optical information memory
12/08/1987US4712205 Opto-electronic focussing-error detection system with a compound wedge beam splitter
12/08/1987US4712204 Optical disk and method for reproducing reference signal therefrom
12/08/1987US4711996 Redundant optical recording of information in different formats
12/08/1987US4711821 Opto-magnetic recording medium
12/08/1987US4711815 Transition metal oxide coloring layer; proton donor
12/08/1987US4711798 Optical information recording medium
12/08/1987US4711347 Protective envelope for optical data card
12/08/1987CA1230179A1 Optical disc cartridge
12/08/1987CA1230178A1 Disc playback apparatus
12/03/1987DE3718302A1 Information recording carrier
12/02/1987EP0247829A1 Method and apparatus for correcting loop gain of a fine adjustment servo loop
12/02/1987EP0247810A2 Optical turnable system
12/02/1987EP0247673A1 Method of manufacturing an optically readable disc record
12/02/1987EP0247441A1 Optical information recording/reproducing tape, process for production thereof, and recording/reproducing method therefor
12/02/1987CN87103811A Optical disc player
12/01/1987US4710913 Optical recording disc
12/01/1987US4710911 Method for recording, reproducing and erasing optical information
12/01/1987US4710910 Safe loading-unloading system for tray in compact disc player
12/01/1987US4710909 Phase compensation apparatus for an optical information recording and reproducing system
12/01/1987US4710908 Servo apparatus for compensating for warp and deflection deviations on optical discs
12/01/1987US4710899 Chalcogenide and transition metal
12/01/1987US4710452 Thin film amorphous optical recording films
12/01/1987US4710418 Sealed edge area of substrate is free of recording material; corrosion resistant
12/01/1987CA1229916A1 Quad density optical data system
12/01/1987CA1229915A1 Ceramic overcoated optical recording elements having heat-deformable recording layers
11/1987
11/25/1987EP0246919A2 Tracking servo device for data reading device
11/25/1987EP0246899A1 Optical information recording and reproducing apparatus
11/25/1987EP0246830A2 Optical information recording and reproducing apparatus
11/25/1987EP0246597A2 Method of reproducing signals from optical disk
11/25/1987EP0246542A2 Optical disc player
11/24/1987US4709417 Optical modulation system
11/24/1987US4709363 Optically readable information disc having a reflection layer formed from a metal alloy
11/24/1987US4709139 Coma correction in optical head with astigmatism for focusing error detection
11/24/1987US4709000 Acrylic resins of low hygroscopicity
11/19/1987EP0245953A1 Manufacture of optical data storage discs
11/19/1987EP0245821A2 Data record formatting system and reading/writing system for optical recording medium
11/19/1987EP0245511A1 Optical card reader
11/19/1987EP0245281A1 Updatable micrographic pocket data card
11/19/1987DE3716191A1 Halbleiterlaser-anordnung Semiconductor laser arrangement
11/19/1987DE3715443A1 Optical system for photo-magnetic recording device
11/18/1987CN87101756A Optical information carrier, erasing the information of carrier method and optical stores device therefor
11/17/1987US4707821 Disc holder for a rigid audio and/or video disc
11/17/1987US4707818 Method and apparatus for recording digitized information on a disc
11/17/1987US4707817 Method of generating tracking servo signal for optical disc playback apparatus
11/17/1987US4707816 Method and apparatus for composite wobbled and push-pull tracking servo system
11/17/1987US4707814 Extended cavity laser recording method and apparatus
11/17/1987US4707805 Data processing circuit for digital audio system
11/17/1987US4707648 Focus servomechanism control system of optical disc system having offset setting means
11/17/1987US4707431 Multilayer, light curable acrylate monomer
11/17/1987US4707430 Optical recording medium
11/17/1987US4707425 Optical recording method and media therefor
11/17/1987CA1229410A1 Erasable optical data storage medium and method and apparatus for recording data on the medium
11/11/1987EP0244827A2 Improved optical head
11/10/1987US4706235 Differential track recording
11/10/1987US4706133 Method and apparatus for recovering information from a videodisc
11/10/1987US4705941 Apparatus for detecting a focusing state of an optical system
11/10/1987CA1229167A1 Bar code reading device
11/10/1987CA1229166A1 Optical data tape cartridge having wide angle read/write surface
11/10/1987CA1229165A1 Direct read after write
11/10/1987CA1229164A1 High density codes for optical recording
11/10/1987CA1229113A1 Scaffolding and locking discs therefor
11/04/1987EP0244014A2 Method for the regeneration of spent alumina-based catalysts
11/04/1987EP0244005A1 Method of scanning a radiation-sensitive recording surface of a rotating disc-shaped carrier by means of a modulated radiation beam and optical write apparatus for carrying out the method
11/04/1987EP0243976A2 Method for recording, reproducing and erasing information and thin film for recording information
11/04/1987EP0243958A2 Optical information recording medium
11/04/1987EP0243517A1 Method for producing information storage disk
11/04/1987EP0243503A1 Data recording/regenerating device
11/03/1987US4704712 Low-friction slide apparatus for optical disc translation stage
11/03/1987US4704711 Process and device for regenerating the phase of synchronizing signals in a data carrier optical write-read apparatus
11/03/1987US4704326 Laser beam causes phase transformation resulting in reflectance variations
11/03/1987CA1228919A1 Magneto-optical apparatus
11/03/1987CA1228918A1 Method and device for reshaping a signal produced by reading data recorded on an optical disc
10/1987
10/28/1987EP0243170A2 Semiconductor laser apparatus
10/28/1987EP0242942A2 Optical recording medium and process for producing the same
10/28/1987EP0242597A2 Micro mechanical actuation of a transducer head on a slider
10/28/1987EP0242576A2 Restoring and clocking pulse width modulated data
10/28/1987CN87102769A Optical record carrier and apparatus for reading record carrier
10/27/1987US4703469 Optical data recording using radiation of different characteristics
10/27/1987US4703468 Optical disc tracking servo circuit having compensation for disc defects and external disturbances
10/27/1987US4703467 Video disc read back scanner
10/27/1987US4703466 Device and method for controlling movement of focusing lens for optical disk reading apparatus
10/27/1987US4703408 Apparatus and record carrier for optically writing information
10/27/1987US4703367 Recording disk data playback apparatus
10/27/1987US4702991 Optical type information recording medium and manufacturing method thereof
10/27/1987US4702958 Graphite particles in binder
10/27/1987US4702945 Dye containing polymer layer on support-liquid crystals
10/27/1987US4702558 Liquid crystal information storage device
10/27/1987US4702555 Optical system drive for optical recording/reproducing apparatus
10/27/1987CA1228633A1 Recording apparatus for linewise recording information on a moving photoreceptor
10/22/1987WO1987006386A1 Device for optically reading optical recording media
10/21/1987EP0242217A2 Optically recordable carriers
10/21/1987EP0242215A2 Apparatus for data recording disc playback
10/21/1987EP0242118A2 An optical information medium and apparatus for reading information from, and/or writing information on, such a medium
10/21/1987EP0242078A2 Optical information recording medium having tracking tracks and pre-format signals pre-recorded thereon
10/21/1987EP0241978A1 Optical record carrier and apparatus for reading the record carrier
10/21/1987EP0241942A2 Optical type head device
10/21/1987EP0241934A2 Ultrahigh-density recording system utilizing focused beam
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