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)
12/1985
12/31/1985US4562567 Apparatus for controlling the write beam in an optical data recording system
12/31/1985US4562565 Tracking servo system
12/31/1985US4562564 Process and optical device for generating signals controlling the position of a scanning spot of the tracks of a data carrier
12/31/1985US4562562 Tracking system for controlling the radial positioning of a transducer on a disc medium
12/31/1985US4562346 Apparatus and method for detecting focus condition of imaging optical system employing both sharpness detection and lateral shift detection
12/27/1985EP0165804A1 Stamper for replicating high-density data recording disks and process for producing the same
12/27/1985EP0165440A2 Method and structure for optical recording
12/27/1985EP0165320A1 Disk-shaped recording medium and apparatus for reproducing the same
12/24/1985US4561086 Optical write/read unit with selective-transparency cover
12/24/1985US4561083 Memory circuit write-in system
12/24/1985US4561082 Process and system for optical recording and reading on a mobile data carrier
12/24/1985US4561081 Opto-electronic apparatus for inscribing and/or reading recording tracks by means of a radiation beam
12/24/1985US4561080 Automatic focusing device in an optical type data reproducing apparatus
12/24/1985US4561079 Support structure of an optical part
12/24/1985US4560925 Mirror position sensor and associated pivot suspension for improved track selection in optical data disk system
12/19/1985WO1985005721A1 Method of manufacturing stamper
12/18/1985EP0164863A1 Start-control methods and circuits for optical disc play-back systems
12/18/1985EP0164746A2 Optical information recording and reproducing apparatus and optical disc
12/18/1985EP0164727A2 Composite substrate plate for magnetic or optical disk and process for production thereof
12/18/1985EP0164687A2 Optical head for focusing a light beam on an optical disk
12/18/1985EP0164642A2 Recording and reproduction apparatus
12/18/1985EP0164577A1 Optical information recording/reproducing system
12/17/1985USRE32051 Tracking system and method for video disc player
12/17/1985US4559622 Optical memory system providing improved focus detection and control by detecting reflected beam diameter variations at spaced predetermined locations in the system
12/17/1985CA1198209A1 Optical disc
12/11/1985EP0164131A2 Information recording medium disc and method and apparatus for recording/reproducing information
12/11/1985EP0164071A2 Pickup head position control device in an optical type disc reproducing device
12/11/1985EP0164061A1 Optical disk exclusively used for reproduction
12/11/1985EP0163810A2 Optical information recording carrier
12/10/1985US4558446 Memory system
12/10/1985US4558441 Data recording and reproducing apparatus and method
12/10/1985US4558375 Method and apparatus for recording and retrieving video information in two modes on a single laser recording disc
12/10/1985US4558213 Pickup level control device for a system for reading out recorded information
12/10/1985US4557566 Spherical lens for spherically symmetrical graded refractive index distribution provided with rod clad
12/10/1985US4557564 Movable scanning unit for an optical recording or playback apparatus
12/10/1985CA1197923A1 Reflective optical data storage and laser recording medium
12/10/1985CA1197922A1 Recording disc
12/05/1985WO1985005487A1 Optical head for optical disc players
12/05/1985WO1985005486A1 Apparatus for recording data
12/05/1985WO1985005485A1 Apparatus for recording data
12/04/1985EP0163421A1 Method for recording and erasing optical information
12/04/1985EP0163397A1 Erasable, reusable optical recording elements and methods for erasing such elements
12/04/1985EP0163378A1 Optical information recording member
12/04/1985EP0163192A2 Optical system drive for optical recording/reproducing apparatus
12/04/1985EP0044345B1 Process for making video and similar discs
12/03/1985US4556968 Unconstrained removable protective cover for optical disk
12/03/1985US4556967 Record carrier having an optically readable information structure comprised of information areas of two different phase depths
12/03/1985US4556966 Information carrier disk with angular coding means and a system for driving said disk in rotation
12/03/1985US4556965 Information recording apparatus having automatic focusing
12/03/1985US4556964 Technique for monitoring galvo angle
12/03/1985US4556893 Optical recording medium of high sensitivity
12/03/1985US4556524 Method for preparing digital storage device by laser application
12/03/1985US4556296 Objective lens for use with information storage disks
12/03/1985CA1197589A1 Coded data on a record carrier and method for encoding same
12/03/1985CA1197401A1 Objective lens assembly for optical disc player
12/03/1985CA1197358A1 Method for removal of a data carrier disk after molding and a device for the application of said method
11/1985
11/27/1985EP0162702A1 Tracking control arrangements for use in optical disc players
11/27/1985EP0162633A1 Methods of preparing and applying subbing layers for optical data disks
11/27/1985EP0162349A2 A data recording medium
11/26/1985US4555803 Image information filing apparatus and method
11/26/1985US4555780 Optical recording and playback unit
11/26/1985US4555736 Disc and videodisc reader head positioning control system
11/26/1985US4555734 Video time base and drop out corrector
11/26/1985US4555716 Optical disk having elastic deformable spacer
11/26/1985US4555472 Optical recording media
11/21/1985WO1985005078A1 Optical recording medium
11/21/1985EP0161809A1 Overcoated recording elements having amorphous dye and binder optical recording layers
11/21/1985EP0161457A2 Tetra(dialkylaminophenyl)cyanines, their preparation and their use
11/19/1985US4554655 Optical data recording disc and system
11/19/1985US4554654 Optical memory device with means for detecting erroneous data writing
11/19/1985US4554653 Focusing optical head movable radially by a carriage
11/19/1985US4554652 Optical information processor
11/19/1985US4554600 Track following code and track following system
11/19/1985CA1197006A1 Process for obtaining a copy disk from an original recording carried by a matrix
11/12/1985US4553232 Clamping device for optical disk assemblies
11/12/1985US4553229 Apparatus for reading information
11/12/1985US4553228 Mobile pre-etched data carrier and an optical tracking device using such a carrier
11/12/1985US4553227 Optical pickup
11/12/1985CA1196720A1 Disc-shaped, optically readable information carrier having high storage density
11/07/1985WO1985004978A1 Recording/reproducing optical system
11/06/1985EP0160535A2 Obturator disc for an optical transducer
11/06/1985EP0160214A1 Recording medium
11/06/1985EP0160204A2 Adjustable optical wedge
11/06/1985EP0160095A1 Tracking servo circuit for optical disk
11/05/1985US4551828 Quadrilayer optical draw medium
11/05/1985US4551827 Fluorescent soundtrack readout system
11/05/1985US4551819 Optical recording method and apparatus utilizing polymeric birefringent materials
11/05/1985US4551733 Protected optical disc comprising a flexible closure element
11/05/1985US4551413 Recording element for optical data storage
10/1985
10/30/1985EP0159785A2 Optical recording & reproducing apparatus
10/30/1985EP0159397A2 Multistate optical switching and memory device using an organic charge transfer material
10/29/1985US4550396 Retaining rings for optical disk assemblies
10/29/1985US4550395 Holographic system for the storage of audio, video and computer data
10/29/1985US4550394 System for optically recording information
10/29/1985US4550347 Method for recording information on a recording disc
10/29/1985US4550249 Optical disc read/write apparatus
10/29/1985CA1196101A1 Optical disc player
10/29/1985CA1196100A1 Apparatus for optically reproducing an information signal recorded on a record disc
10/29/1985CA1196099A1 Device for rapidly moving an optical pick-up device in an optical reproducing apparatus to a desired position on a record disc
10/29/1985CA1196098A1 Optical memory apparatus
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