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)
09/1987
09/15/1987	US4693943 Magnetooptical recording medium
09/15/1987	US4693915 Clathrate complexes
09/15/1987	US4693555 Device for holding an imaging lens
09/09/1987	EP0235861A1 Device for detecting a centring error
09/09/1987	EP0235812A1 Optical disk
09/09/1987	EP0235800A2 Plastic substrate for optical disk and process for producing the same
09/09/1987	EP0235748A2 Liquid crystal disc memory
09/09/1987	EP0235304A1 Anamorphic prism
09/09/1987	EP0130213B1 Recording medium for optical data storage
09/09/1987	CN87101889A Optical storage
09/08/1987	US4692915 Recording and reproduction apparatus having improved reliability with respect to externally applied vibration or impact
09/08/1987	US4692603 Optical reader for printed bit-encoded data and method of reading same
09/08/1987	US4692402 Ultrathin optical recording medium with moisture barrier
09/08/1987	US4692394 Method of forming a personal information card
09/08/1987	CA1226671A1 Optical recording medium
09/02/1987	EP0234709A2 Optical disk duplicating apparatus and duplicated optical disk
09/02/1987	EP0234594A2 System capable of retrieving information from an optical memory
09/02/1987	EP0234588A2 Optical memory
09/02/1987	EP0234547A2 Method of manufacturing photomask and photo-mask manufactured thereby
09/02/1987	EP0233984A1 Method of recording and reproducing digital information and apparatus therefor
09/01/1987	US4691311 Disc reading apparatus with disc shoot journaled in frame
09/01/1987	US4691310 Compact disk read only memory recording system with speed control
09/01/1987	US4691280 High performance multi-processor system
09/01/1987	US4691098 Focus control device
09/01/1987	CA1226376A1 Electron beam enhanced surface modification for making highly resolved structures
08/1987
08/27/1987	WO1987005142A1 Device for detecting focus
08/26/1987	EP0233644A2 An optical recording disc
08/26/1987	EP0233590A1 Method and apparatus for detecting focussing position
08/26/1987	EP0233380A1 Optical scanning unit
08/26/1987	EP0233313A2 Two axis electromagnetic actuator
08/25/1987	US4689795 Semiconductor laser controller
08/25/1987	US4689781 Optical system for tracing information recording medium with multiple beams
08/25/1987	US4689780 Optical recording and reproducing head
08/25/1987	US4689779 Tracking control system for optical record disc information reproducing apparatus
08/25/1987	US4689778 Optical disc recording/reproducing apparatus with recorded track-section detector
08/25/1987	US4689481 Focus error detector and optical head using the same
08/25/1987	US4689479 Optical focussing and tracking system using a polarization prism for dividing the reflected beam
08/25/1987	US4688880 Hologram lens
08/25/1987	CA1226063A1 Optical memory disc
08/24/1987	EP0188523A4 Improved substrate for rigid disk storage media and method and apparatus for making the same.
08/19/1987	EP0233138A1 Manufacturing method for a recorded disc-shaped matrix
08/19/1987	EP0233081A1 Active energy ray-curable composition
08/19/1987	EP0233062A2 Magneto-optic memory medium
08/19/1987	EP0233034A2 Optical memory element
08/19/1987	EP0232964A2 Near-infrared sensitive phthalocyanine-polymer compositions
08/19/1987	EP0232867A1 Optical memory device
08/19/1987	EP0232427A1 Optical recording medium
08/19/1987	EP0232293A1 Process and device for recording an information signal
08/19/1987	CN86107003A Invertible optical recording information dielectrical
08/18/1987	US4688205 Data demodulation apparatus
08/18/1987	US4688204 Pulsed optical data detection system
08/18/1987	US4688203 Optical recording and reproducing apparatus
08/18/1987	US4688202 Tracking control system for an information reproducing apparatus
08/18/1987	US4688201 Focusing and tracking apparatus for an optical data storage device
08/18/1987	US4687916 Optical pick-up device for both focus and error tracking detection
08/18/1987	US4687720 Side lobe suppression in holograms using pre-exposure
08/18/1987	US4687296 Optical pickup
08/13/1987	WO1987004847A1 Device for detecting defect of disc-like recording media
08/13/1987	WO1987004844A1 Optical memorizing device
08/13/1987	WO1987004843A1 Optical information carrier, method and optical memorization device for erasing the information therein
08/13/1987	WO1987004842A1 Method of erasing information
08/13/1987	WO1987004841A1 Method and optical memorization device for recording and erasing of information on an optical carrier
08/13/1987	WO1987004840A1 Optical memorization device
08/13/1987	WO1987004839A1 Method of photothermal recording, reading and erasing of information
08/13/1987	WO1987004838A1 Apparatus and method for increasing storage capacity of recording media
08/13/1987	WO1987004837A1 Process for producing a prerecorded disk-shaped matrix
08/12/1987	EP0232134A2 Optical disc and disc drive apparatus for writing/reading data into/from the disc
08/12/1987	EP0232113A2 Recording medium including a glutamate copolymer
08/12/1987	EP0231858A2 Device for reversible optical data storage
08/12/1987	EP0231857A2 Reversible, optical data storage method
08/12/1987	EP0231856A2 Method for reversible optical data storage
08/12/1987	EP0231672A2 Optical memory device and process for fabricating same
08/12/1987	EP0231380A1 Method of recording data onto an optical data recording card
08/12/1987	EP0231351A1 Dual stripe optical data card
08/12/1987	EP0231350A1 System and method for making recordable wallet-size optical card
08/12/1987	EP0231349A1 Data system employing wallet-size optical card
08/11/1987	US4686665 Mode switching device in a disc playback device
08/11/1987	US4686663 Track follower system employing an optical scanner with automatic control of a rotatably movable phase grating used for the generation and positioning of read beam spots
08/11/1987	US4686662 Subaperture coarse tracking optical system for optical data storage devices
08/11/1987	US4686543 Information recording medium
08/11/1987	US4686359 Picture scanning and recording using a photoelectric focusing system
08/11/1987	US4686169 Optical recording medium and production of the same
08/11/1987	US4686143 Optical information recording medium
08/11/1987	CA1225467A1 Method of manufacturing optical memory element
08/11/1987	CA1225460A1 Disc holder for a rigid optically readable disc
08/05/1987	EP0231121A2 Improved optical disc structure having an air sandwich structure
08/05/1987	EP0231103A2 A head positioning system
08/05/1987	EP0231009A2 Optical recording medium
08/05/1987	EP0230950A2 Colouring agent for electrophotographic recording processes
08/05/1987	EP0230728A2 Photolithography
08/05/1987	EP0230587A2 Coated media for optical recording and associated coating techniques
08/05/1987	CN87100374A Optical card apparatus for recording and/or reproducing information
08/04/1987	US4685098 Apparatus for reproducing data signal
08/04/1987	US4685097 Power control system for a semiconductor laser
08/04/1987	US4685096 Optical disk with pre-recorded marker pattern
08/04/1987	US4684799 Focus detection method involving cutting more than half of light beam reflected from disc
08/04/1987	US4684797 Optical system and method for reducing vibration of an objective lens in an optical head assembly of an optical read/write system
08/04/1987	US4684598 Enhanced optically sensitive medium using organic charge transfer materials to provide reproducible thermal/optical erasure
08/04/1987	US4684206 Light waveguide with a submicron aperture, method for manufacturing the waveguide and application of the waveguide in an optical memory
08/04/1987	CA1224921A1 Optical recording element

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