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)
07/1989
07/18/1989US4848864 Scanner for the optical scanning of objects
07/18/1989CA1257493A1 Automatic focusing device
07/13/1989WO1989006424A1 Optical head
07/13/1989WO1989006423A1 Device for tracking optical memory card
07/13/1989WO1989006248A1 Lowly hygroscopic methacrylate polymer
07/13/1989DE3804752C1 Digital optical read-only memory and method of tracking control in such an optical read-only memory
07/12/1989EP0323845A2 An apparatus for rotating a light image and an optical system for focusing light beams on a recording medium
07/12/1989EP0323684A1 Optical memory
07/12/1989EP0323678A2 Method of recording information, recording element manufactured according to the method and method of producing a metal matrix
07/12/1989EP0323523A1 Optical recording medium
07/12/1989CN1033893A Process for preparation of optical recording medium
07/12/1989CN1033892A Magnetic light recorder
07/12/1989CN1033822A Active energy ray-curable composition and optical recording emdium having cured of composition
07/11/1989US4847848 Semiconductor laser device
07/11/1989US4847846 Semiconductor laser chip
07/11/1989US4847827 Optical information recording disk
07/11/1989US4847822 Optical information recording and reproducing apparatus with tracking control by sampling
07/11/1989US4847821 Process for searching for a track on a rotating plate-like information support and circuit for performing the process
07/11/1989US4847763 Laser audiometer system
07/11/1989US4847480 Focus error detecting apparatus
07/11/1989US4847478 Optical pick-up device
07/11/1989US4847385 Cyanine dyes
07/11/1989US4847132 Mixture of solid insoluble materials
07/11/1989US4847033 Process for improving dimensional stability of polymeric films useful in optical disk assemblies
07/11/1989CA1257392A1 Optical pickup with hologram lenses
07/11/1989CA1257391A1 Optical disk tracking and seeking systems and specific track formats (servo areas)
07/11/1989CA1257390A1 Optical disk tracking and seeking systems and specific track formats (wobbled pits)
07/11/1989CA1257389A1 Optical disk tracking and seeking systems and specific track formats (discontinuities)
07/11/1989CA1257364A1 Position-sensitive radiation detector
07/11/1989CA1257235A1 Focus control system for optical information recorder or player
07/05/1989EP0323320A2 Optical head and tracking method using same
07/05/1989EP0323232A2 Recording and reproducing device for magneto-optical card
07/05/1989EP0323227A2 Information recording-reproducing method and apparatus
07/05/1989EP0323225A2 Cast molding die and process for producing information recording medium using the same
07/05/1989EP0323202A1 Disk player
07/05/1989EP0323184A1 Halogenated anthraquinones useful as near infrared absorbing optical filters, and method of making them
07/05/1989EP0323167A2 Helical scan tape record apparatus and method
07/05/1989EP0323154A2 Data transducer position control system for disk storage drive system
07/05/1989EP0322903A2 Optical image recording apparatus
07/05/1989EP0322867A2 Vitreous film and heat-mode optical recording medium using same
07/05/1989EP0322841A2 Optical disk apparatus
07/05/1989EP0322840A2 Optical disk apparatus
07/05/1989EP0322714A2 Polarizing optical element and device using the same
07/05/1989EP0322708A2 Polymers with amide groups in the side chains
07/05/1989EP0322653A1 Information recording medium
07/05/1989EP0322652A1 Recording and/or reproducing apparatus for tape type optical recording medium
07/05/1989EP0322462A1 Objective lens driving device
07/04/1989US4845720 Semiconductor laser control circuit
07/04/1989US4845701 Optical disc player for optically reproducing recorded information on an optical information disc into an RF signal
07/04/1989US4845699 Electric mechanical transducer and optical type pickup apparatus driven by a magnetic field
07/04/1989US4845698 Method of skipping tracks while searching for a track and circuitry for carrying out the method
07/04/1989US4845697 Method of time limited searching for a track address on an optically read information disc
07/04/1989US4845696 Apparatus for optically recording and reproducing information in record tracks on a rotatable record disk
07/04/1989US4845695 Optical disk memory system utilizing a chiral smectic liquid crystal
07/04/1989US4845529 Storage apparatus comprising a plurality of layers
07/04/1989US4845515 Recording material utilizing multilayer Bi/Se film
07/04/1989US4845240 Optical recording medium and process for producing the same
07/04/1989US4845021 Photochromic dye forming aggregate
07/04/1989US4845000 Radiation sensitive carrier body utilized as stamper structure
07/04/1989US4844584 Semiconductor laser beam splitting device
07/04/1989CA1256993A1 Device for translating a slide and electrodynamic apparatus comprising said device
06/1989
06/29/1989WO1989006037A1 Data recording medium
06/29/1989WO1989006036A1 Laminate for protecting optical recording layer
06/29/1989WO1989006017A1 Method for reading data pages on a data surface
06/28/1989EP0322057A1 Method of manufacturing a matrix and a master plate suitable for use in the method
06/28/1989EP0321831A2 The use of blends of polycarbonates and styrene polymerizates as substrates for optical memories
06/28/1989EP0321704A2 Optical recording medium
06/28/1989EP0321587A1 Reader circuit for optical recording medium
06/28/1989CN1004660B Optical storage
06/28/1989CN1004659B Optical information carrier, erasing the information of carrier method and optical stores device therefor
06/27/1989US4843604 Beam controller for magneto-optical disc memory system
06/27/1989US4843603 Concentric photodetector arrangement for focusing and tracking
06/27/1989US4843602 Apparatus providing extended range of proportional control of the radial excursion of a write/read light spot on the tracks of a disc-shaped record carrier
06/27/1989US4843601 Tracking servo system for optical disk playre apparatus
06/27/1989US4843504 Superconductor devices useful for disk drives and the like
06/27/1989US4843494 Data storage apparatus using optical servo tracks
06/27/1989US4843484 Information recording disc with composite index codes and its playback method
06/27/1989US4843335 Acoustooptic modulation device capable of avoiding impedance mismatching over a wide frequency band
06/27/1989US4842824 Optical storage medium
06/27/1989US4842392 Objective lens driving unit
06/27/1989US4842381 Electrochromic data recording systems
06/27/1989US4842380 Liquid crystal optical elements
06/27/1989CA1256561A1 Printed data strip including bit-encoded information and scanner control
06/21/1989EP0321314A2 Optical disc
06/21/1989EP0321039A1 Optical scanning unit and an optical read and/or write apparatus comprising such a unit
06/21/1989EP0320975A2 Information recording/reproducing method and apparatus
06/21/1989EP0320834A2 Optical recording medium
06/21/1989EP0320671A2 Optical sensing device
06/21/1989EP0320520A1 A disk data storage file
06/21/1989EP0320509A1 Data reproduction device.
06/20/1989US4841515 Read-write optical disk
06/20/1989US4841514 Optical recording method and apparatus using two fight spots
06/20/1989US4841512 Optical disk apparatus with an erase checking function
06/20/1989US4841510 Optical characteristic measuring apparatus for an optical recording medium substrate
06/20/1989US4841509 Apparatus and method for detecting focus error signal and tracking error signal in an optical disk system
06/20/1989US4841508 Method and apparatus for detecting a track and focus errors in an optical head
06/20/1989US4841507 Optical head for an optical recording and reproducing apparatus
06/20/1989US4841501 Plastic substrate for optical disk and process for producing the same
06/20/1989US4840873 Laminating thin metal film and plastic; heat treatment
06/20/1989US4840473 Optical device
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