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)
10/1990
10/17/1990EP0392777A2 Track access control system in rotating disc devices with eccentricity correction
10/17/1990EP0392775A2 A detrack detecting system in an optical recording/reproducing apparatus
10/17/1990EP0392561A2 Optical disk drive
10/17/1990EP0392531A2 Recording medium
10/17/1990EP0392488A2 Optical video disc player
10/17/1990EP0392355A2 Optical-recording medium
10/17/1990EP0392179A1 Optical recording medium
10/17/1990CN1046239A Circuit in scanning device for optical recording/reproducing device
10/17/1990CN1046238A Magneto-optical disk memory allay material and preparation method thereof
10/17/1990CN1046226A Optical recording medium and method for making same
10/16/1990US4964111 Slider control device for disk player
10/16/1990US4964094 Optical disk
10/16/1990US4963901 Direct read after write optical storage medium and information storage system
10/16/1990US4963669 Purification of tellurapyrylium dyes
10/16/1990US4963464 Irradiating with light beams
10/16/1990US4963448 Transparent substrate, photochromic compound, liquid crystal
10/16/1990US4962999 Optical pick-up device
10/11/1990DE3911525A1 Circuit for detecting the type of an optical recording carrier
10/10/1990EP0391771A1 Method for multiplexing different sorts of digital signals, method and interface for decoding, digital desk for storing those kinds of signals
10/10/1990EP0391691A2 Optical recording and reproducing appparatus
10/10/1990EP0391677A1 Load correction method in retrieval apparatus
10/10/1990EP0391664A1 Optical diffraction grating element, and optical pick-up device and optical scan device that respectively comprise optical diffraction grating element
10/10/1990EP0391631A1 Photochromic compounds useful in Langmuir-Blodgett films
10/10/1990EP0391627A2 Speed detection apparatus, speed control motor, and track jump control circuit
10/10/1990EP0391423A2 Optical recording medium and method of making same
10/10/1990EP0391422A2 Optical disk unit
10/10/1990EP0391359A2 Photo detecting device
10/10/1990EP0391284A1 Tetrazaporphin dye mixtures
10/10/1990EP0391145A2 Pickup driving device for disk player
10/10/1990EP0390977A2 Servo system for a disc player
10/10/1990EP0390957A1 Optical disk substrate
10/10/1990EP0188627B1 Apparatus for recording and/or reproducing optical cards
10/10/1990CN1046060A Method of and device for recording data singnals on a record carrier of an inscribable type, and device for reading such a record carrier
10/09/1990US4962493 Record carrier with a follow-on track and apparatus for recording information thereon
10/09/1990US4962479 Optical data storage system with wavelength selective laminate
10/09/1990US4962301 Method of reciprocally recording data on card-like record medium for unidirectional reading
10/09/1990US4961979 Transparent substrate with tracking line, recording layer of low oxide of nickel; for sensitive, high-speed, high-density recording with laser
10/09/1990US4961884 Stamps, projections, grooves, injection molding, resins, air, pressurization
10/06/1990CA2013867A1 Optical recording medium and method for making same
10/04/1990WO1990011601A2 Method of manufacturing an optical disc
10/04/1990WO1990011600A1 A process facilitating the continuous playing of both sides of a disc without any interruption which can be detected by the user at the end of side 1, constant linear and/or angular speed, and a device applying said process
10/04/1990WO1990011599A1 Optical recording and/or playback system
10/04/1990WO1990011598A1 Optical recording and/or playback system with rotary scanner
10/04/1990CA2013293A1 Tetrazaporphin dye mixtures
10/03/1990EP0390610A2 Optical element and optical pickup device comprising it
10/03/1990EP0390601A2 Information recording disk, and information record/reproducing method and apparatus utilizing the same
10/03/1990EP0390584A2 Photomagnetic composite head
10/03/1990EP0390564A2 A metal mold for resin substrate for an optical recording medium and recording medium obtained by it
10/03/1990EP0390470A2 Storage medium, storage method and stored information reading method
10/03/1990EP0390467A2 Digital servo control apparatus
10/03/1990EP0390445A2 Optical pickup head
10/03/1990EP0390413A2 Optical disc and method for making same
10/03/1990EP0390268A2 Method of and device for recording data signals on a record carrier of an inscribable type
10/03/1990EP0390263A1 Device for inscribing and/or reading a magneto-optical information carrier
10/03/1990EP0390260A1 Device for inscribing and/or reading a magneto-optical information carrier
10/03/1990EP0390259A1 Device for inscribing and/or reading a magneto-optical information carrier
10/03/1990EP0390116A2 Optical information processing system
10/03/1990EP0389813A1 A method for preparing a photochromic material
10/03/1990EP0389689A1 Method for transmitting a transmission signal and a transmitting device and a receiving device for use in the method
10/02/1990US4961183 Optical disk arrangement with closed contours whose entire extent represents information
10/02/1990US4961182 Information retrieving system with level clamping
10/02/1990US4961179 Curable reaction compositions for producing data carriers
10/02/1990US4961077 Method for affixing information on read-only optical discs
10/02/1990US4960890 For optical recording media
10/02/1990US4960680 Recording elements comprising write-once thin film alloy layers
10/02/1990US4960679 Image forming device
10/02/1990US4960627 Tellurium and chromium metal or alloy recording layer; oxidation resistance
10/02/1990US4960538 Light, weather, thermal resistance
10/02/1990US4960321 For focusing a light beam
10/02/1990US4960313 Apparatus for rotating a light image and an optical system for focusing light beams on a recording medium
10/02/1990US4960268 Spacer holder arrangement
09/1990
09/30/1990CA2008779A1 Substrate for optical recording media and molding composition therefor
09/28/1990CA2013131A1 Method for multiplexing digital signals of differing types, method for decoding such signals, interface for decoding signals multiplexed according to said method and digital disk carrying said signals
09/27/1990DE3908312A1 Novel fluorescent perylene and diketopyrrolopyrrole colour pigments
09/26/1990EP0388958A2 Gain/phase compensation circuit for use in servo control system of optical disk device
09/26/1990EP0388897A2 Writing optical disk data
09/26/1990EP0388760A1 Laser diode and multibeam optical head using the laser diode
09/26/1990EP0388555A2 Method for setting the loop gain in a tracking servo loop
09/26/1990EP0388551A2 Method for setting the loop gain in a focusing servo loop
09/26/1990EP0388519A2 Method for setting the loop gain of servo loops in a disc player
09/26/1990EP0388452A1 Connectorless hermetic optical disk system
09/26/1990EP0355121A4 High contraste optical memory tape
09/26/1990EP0220251B1 Automatic correction system for the servo-circuit of a device with optical scanning of a rotating information support
09/26/1990CN1009775B Apparatus for writing and/or reading information in/from disc shaped record carrier
09/25/1990US4959824 Optical information record/pickup head assembly
09/25/1990US4959823 Tracking and seeking system for use with an optical record carrier having a wobbled track format
09/25/1990US4959822 Record-carrier body provided with a relief structure of optically detectable servo-track portions and sector addresses and apparatus for forming said structure
09/25/1990US4959821 Optical pick-up for scanning a magneto-optically recorded medium
09/25/1990US4959448 Liquid crystalline side-chain polyesters prepared by polycondensation reactions
09/25/1990US4959252 Highly oriented thermotropic optical disc member
09/19/1990EP0388271A2 Apparatus for optically recording information signal onto a recording medium
09/19/1990EP0387898A2 Optical recording medium
09/19/1990EP0387879A2 Optical videodisk player
09/19/1990EP0387577A2 Polycarbonate compositions
09/19/1990EP0387360A1 Cyanine compounds
09/18/1990US4958339 Optical card with increased data storage capacity and recording/reproducing apparatus therefor
09/18/1990US4958338 Hierarchically multiplexed optical recording system for storage of digital data
09/18/1990US4958336 Optical head device
09/18/1990US4958335 Optical head assembly with a minimum of inertia and feasible for high high-speed access
09/18/1990US4958314 Information recording/reproducing apparatus
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