Patents
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)
07/1984
07/24/1984US4461552 Film sound track recording and playback system
07/24/1984CA1171316A1 Thermo-optic information writing process and information support for implementing this process
07/24/1984CA1171276A1 Information recording material
07/19/1984WO1984002795A1 Recording medium for optical data storage
07/19/1984WO1984002794A1 Recording medium for optical data storage
07/18/1984EP0113426A1 Method and apparatus for analyzing the information transfer characteristics of a recording medium
07/18/1984EP0113425A1 Method of and apparatus for establishing the characteristics of a prerecorded two-channel audio program
07/17/1984US4460990 Apparatus for reading an optical record carrier
07/17/1984US4460989 Apparatus for improving focus during playback of an optical data record
07/17/1984US4460988 Data accessing system for optical disk mass memory
07/17/1984US4460977 Optical memory playback apparatus
07/17/1984US4460927 Optical reading device for reading an information carrier with motion effect facilities
07/17/1984US4460665 Multilayer, thin films, cyanine dyes
07/17/1984US4460636 Optical information record member
07/17/1984US4460252 Electrically controlled optical deflector
07/17/1984CA1170873A1 Laminate optical disc and fabrication method
07/11/1984EP0112883A1 Focus and tracking control apparatus for optical disc writing/reading
07/10/1984US4459690 Multi-beam optical record and playback apparatus having an improved beam splitter
07/10/1984US4458980 Optical reproducing head
07/05/1984WO1984002586A1 Reflective optical data storage and laser recording medium
07/04/1984EP0112595A1 Electrodynamic device for translating an objective
07/04/1984EP0112402A1 Light waveguide with a submicron aperture, method for manufacturing the waveguide and application of the waveguide in an optical memory
07/03/1984US4458345 Process for optical information storage
07/03/1984US4458144 Apparatus for reading information stored in a track pattern on a radiation reflecting record
07/03/1984US4458004 Optical information recording medium
07/03/1984US4457794 Depositing film on pregrooved substrate
06/1984
06/27/1984EP0111988A1 Magneto-optic memory device
06/27/1984EP0111557A1 Laser video disc storage and retrieval system
06/26/1984US4456981 Modulation system for optical recording
06/26/1984US4456914 Method and apparatus for storing information on a storage medium
06/26/1984US4456659 Ultraviolet curable films of an acylic-modified polybutadiene, a hydroxy acrylate and an acrylic diluent
06/26/1984US4456375 Optical disc measurement by refraction
06/21/1984WO1984002421A1 Coated media for optical recording, with "soft/hard" overcoat
06/21/1984WO1984002420A1 Image forming and data storage
06/21/1984WO1984002419A1 Improvements relating to data storage and recording
06/21/1984WO1984002395A1 Coated media for optical recording with acrylic overcoat
06/21/1984WO1984002289A1 Coated media for optical recording and associated coating techniques
06/21/1984WO1984002288A1 Coated media for optical recording, associated acrylic coatings and related application methods
06/20/1984EP0111077A1 Device for heat-bonding utilizing temperature-controlled pressure
06/20/1984EP0111010A1 Optical disc reproducer
06/20/1984EP0111006A1 Optical head control signal generator
06/19/1984US4455632 Apparatus for optically reading a record carrier with two types of information areas
06/19/1984US4455085 Method and apparatus for detecting a focussing condition of an objective lens
06/19/1984CA1169555A1 Device for processing optical information and method of manufacturing a coma correction plate as used in such a device
06/13/1984EP0110730A2 Improvements relating to data storage and recording
06/13/1984EP0110729A2 Image forming and data storage
06/13/1984EP0110477A1 Clock-controlled filtering arrangement
06/13/1984EP0110367A2 Coded data on a record carrier and method for encoding same
06/12/1984US4454415 Tracking mirror assembly and control system for an optical data storage disc
06/12/1984CA1169148A1 Tracking device
06/07/1984WO1984002221A1 Data storage devices
06/07/1984WO1984002220A1 Coated media for optical recording and method of fabricating
06/07/1984WO1984002201A1 Medium for recording visual images and laser written data
06/05/1984US4453246 Retaining rings for optical disc assemblies
06/05/1984US4453241 Optical scanning unit for reading information from an optical recording
06/05/1984US4453239 Method and apparatus for controlling the focusing and tracking of a light beam using a main and secondary light beam in association with multiple detectors
06/05/1984US4452819 Disc coating method
06/05/1984US4452748 Process for obtaining a copy disk from an original recording carried by a matrix
06/05/1984CA1168745A1 Stigmatic optical device
05/1984
05/30/1984EP0109547A2 Method of applying a coating to heat sensitive materials
05/29/1984US4451915 Optical storage system employing a multi-layer optical medium
05/29/1984US4451914 Optical storage system employing a multi-layer optical medium
05/29/1984US4451913 Video disc read back scanner
05/29/1984US4451836 Optical disc write/read apparatus
05/29/1984EP0098296A4 Optical recording media.
05/29/1984CA1168359A1 Optical information disk
05/29/1984CA1168358A1 Optical disk cassette
05/23/1984EP0109245A2 Radiation sensitive record disc with improved internal structure
05/23/1984EP0109194A1 Optical information reproducing apparatus
05/23/1984EP0109130A2 Apparatus for controlling the write beam on an optical data recording system
05/23/1984EP0108960A2 Improved fluid bearing for axially movable head
05/22/1984US4450553 Multilayer information disc
05/22/1984US4450547 Focal position detecting optical apparatus
05/22/1984US4450452 Data recording medium
05/22/1984US4449916 Device for manufacturing information recording mediums
05/16/1984EP0108457A1 Method for the production of an optical recording element
05/16/1984EP0108456A1 Optical recording disc
05/16/1984EP0108258A1 A master disk for optical disk manufacture, and a method and the system for manufacturing the same
05/15/1984US4449215 Apparatus for varying track spacing in multi-track optical record systems
05/15/1984US4449213 Optical reading apparatus
05/15/1984US4449212 Multi-beam optical record and playback apparatus
05/15/1984US4449204 Information processing apparatus using a semiconductor laser diode
05/15/1984US4449139 Optical disc unit, fabrication method and cooperating write and/or read apparatus
05/15/1984US4449138 Information recording medium
05/15/1984US4448827 Optically readable information disc comprising an envelope of cross-linked synthetic resin
05/10/1984WO1984001849A1 Fine and coarse servo system for access and tracking on an optical disk
05/10/1984WO1984001848A1 Optical disc
05/09/1984EP0107913A1 Radiation-sensitive carrier body utilized as stamper structure
05/09/1984EP0107754A1 Apparatus for magneto-optical information storage
05/08/1984US4447899 Optical disc method, media and apparatus for writing and/or reading information
05/08/1984US4447722 Optical information reading device
05/08/1984US4447138 Objective system for video disc
05/02/1984EP0107461A1 Optical signal reading device
05/02/1984EP0107379A1 Data storage medium
05/01/1984US4446549 Alkanedioldiacrylate lacquer information track
05/01/1984US4446548 Apparatus for the point-by-point scanning of an object
05/01/1984US4446546 Focus initialization system for optical recording
05/01/1984US4446545 Apparatus for reading a disk-shaped record carrier
05/01/1984US4446487 Method of and apparatus for reading out image information
05/01/1984US4446223 Recording and information record elements comprising oxoindolizine and oxoindolizinium dyes