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)
10/1985
10/29/1985CA1196097A1 Device for compensating the lack of balance of a deviating mirror belonging to an optical system
10/24/1985WO1985004748A1 Optical information storage
10/23/1985EP0159090A1 Equipment which enables the words inscribed on a compact disc to be read while the disc is being played
10/23/1985EP0158994A2 Optical device for reading graphical data on printed or written carriers
10/23/1985EP0158906A2 Optical card
10/23/1985EP0158850A1 Disk production apparatus
10/23/1985EP0158804A1 Apparatus for information recording and reproducing
10/23/1985EP0158790A2 Optical focus detection employing rotated interference patterns
10/22/1985US4549300 Semiconductor laser device
10/22/1985US4549288 Apparatus for enhancing the playback signal in an optical data recording system
10/22/1985US4549190 Light quantity compensation apparatus
10/22/1985US4548889 Matrix of metal oxide with fine metal particles dispersed in it
10/22/1985CA1195775A1 Optical sensor for focusing control
10/16/1985EP0158479A1 Method for producing an optical recording medium by a chalcogenide suboxide
10/16/1985EP0158245A2 Skip circuit for recorded information reproducing unit
10/16/1985EP0158193A1 Optical disk player
10/16/1985EP0158113A1 Use of a polymer for optical disks
10/16/1985EP0158067A1 Optical disc device
10/16/1985EP0157834A1 Preformatted diagnostic information recording disk
10/16/1985EP0039719B1 Motion picture film having digitally coded soundtrack and method for production thereof
10/15/1985US4547876 Optical recording medium and information record and method of making same
10/15/1985US4547875 Optical recording and retrieving disc
10/15/1985US4547872 Optical recording and reproducing apparatus with improved focussing control
10/15/1985US4547871 Two dimensional actuator for moving optical medium of scanning device
10/15/1985US4547444 Recording element for optical data storage
10/15/1985CA1195424A1 Control circuitry for preliminary focusing of light on a record medium surface in an optical reproducing apparatus
10/10/1985WO1985004372A1 Optical recording medium
10/09/1985EP0157490A1 Aperture compensation signal processor for optical recording
10/09/1985EP0157047A2 Method of and driver circuit for controlling a laser diode
10/09/1985EP0157020A1 Device for accurately focussing a laser beam
10/09/1985EP0156903A1 A composite photo-sensitive detector array for optical disk storage systems
10/09/1985EP0156880A1 Optically storing digital data
10/09/1985EP0156879A1 Optical disk format employing resynchronizable data sectors
10/09/1985EP0156859A1 Sync pattern encoding system for data sectors written on a storage medium
10/08/1985US4546465 Optical disc assembly retaining rings
10/08/1985US4546464 Method of manufacturing an optical recording/reproducing disc
10/08/1985US4546463 Apparatus for recording and reading information tracks on an optical record carrier with a beam of radiation
10/08/1985US4546462 Optical data recording and reproducing apparatus
10/08/1985US4546461 Method for recording information on a recording disc
10/08/1985US4546460 Videodisc autofocus device
10/08/1985US4545653 Focusing elements and system for producing a prescribed energy distribution along an axial focal zone
10/08/1985US4545651 Optical system for synthesizing plural light beams
10/02/1985EP0156555A1 Optical reproducing apparatus & method
10/02/1985EP0156460A1 Pick-up arm for an optical disk player
10/02/1985EP0156453A1 Lens for an optical recording/reproducing apparatus
10/02/1985EP0156418A1 Apparatus for recording and/or reading information in/from a track of a reflecting record carrier, which apparatus comprises a focusing control system with reduced spot-offset sensitivity
10/02/1985EP0156412A1 Device for producing electromagnetic radiation
10/02/1985EP0156372A2 Process for producing plastic information-recording medium and resin composition used therefor
10/02/1985EP0156141A2 Prism optics and optical information processing apparatus
10/02/1985EP0156040A2 A method and apparatus for recording on a movable recording medium by using a light beam, and the medium for such a recording
10/01/1985US4545046 Optical recording and/or reading device with spindle and optical elements supported on parallel bars
10/01/1985US4545044 Method and apparatus for optically recording and reproducing information
10/01/1985US4545003 Pick-up device positioning arrangement in an information disc player
10/01/1985US4544957 Time base correction apparatus
10/01/1985US4544956 Image information registering/retrieving system
10/01/1985US4544872 Tracking servo control system for an information read-out system
10/01/1985US4544838 Method and apparatus for detecting tracking error
10/01/1985US4544837 Focus servo control device for an optical system having an initial focus locking operation
10/01/1985US4544835 Data system containing a high capacity optical contrast laser recordable wallet-size plastic card
10/01/1985US4544602 Oxidation resistant
10/01/1985US4544443 Grooves formed directly to substrate
10/01/1985US4544266 Apparatus and a method for testing the authenticity of documents
10/01/1985US4544241 Mirror position sensor and associated motor for improved track selection in optical data disk system
10/01/1985CA1194595A2 Method for forming video discs
09/1985
09/26/1985WO1985004293A1 Control circuit that operates on pulse-width modulated signals
09/25/1985EP0155452A1 Large-diameter optical disk substrate made of polycarbonate, process for its production and mold therefore
09/24/1985US4543650 Servo system including velocity and phase servo circuits for digital audio record disc reproducing apparatus
09/24/1985US4543617 Recording apparatus
09/24/1985US4543307 Optical data storage and recording media having recording surface protection
09/24/1985CA1194231A1 Optical memory system having an improved short seek capability
09/24/1985CA1194230A1 Control system for an optical data recording apparatus
09/24/1985CA1194229A1 Apparatus for reading a disk-shaped record carrier
09/24/1985CA1194228A1 Apparatus for inscribing and/or reading a record carrier
09/24/1985CA1194178A1 Device for detecting the position of an object
09/24/1985CA1194176A1 Device for detecting the position of an object
09/18/1985EP0155077A2 Servo system
09/18/1985EP0155000A2 Method of manufacturing optical memory element
09/18/1985EP0154870A2 Light deflecting arrangement
09/17/1985US4542492 Optical head in a recording and reading device for a data carrier
09/17/1985US4542491 Optical information disc apparatus with autofocusing servo system
09/17/1985US4542288 Method for making a laser recordable wallet-size plastic card
09/17/1985CA1193724A1 Apparatus for optically scanning a disc-shaped record carrier
09/17/1985CA1193723A1 Apparatus for optically scanning a disc-shaped record carrier
09/17/1985CA1193722A1 Apparatus for inscribing and/or reading a record carrier
09/17/1985CA1193721A1 Apparatus for recording and reading information tracks in an optical record carrier
09/11/1985EP0154389A1 Optical recording apparatus
09/11/1985EP0154302A2 Optical system for detecting a position of an objective lens
09/10/1985US4541084 Focus servo system having object lens protection circuit for an optical disc player
09/10/1985US4541083 For jumping a light spot on a track of a recording medium
09/10/1985US4541082 Device for optically tracking information
09/10/1985CA1193364A1 Protected optical disc comprising a flexible closure element
09/10/1985CA1193363A1 Optical disc protected from humidity
09/10/1985CA1193362A1 Optical head in a device for recording and reading a data carrier
09/04/1985EP0153807A1 Optical information recording methods
09/04/1985EP0153736A2 Optical recording element
09/04/1985EP0153729A1 Optical recording medium
09/04/1985EP0153459A1 Two axis electromagnetic actuator
09/03/1985US4539691 Method and apparatus for encoding a binary digital information signal
09/03/1985US4539673 Optical disc air separation method and device
09/03/1985US4539671 Recording and/or reproducing apparatus for a disk
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