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)
05/1989
05/23/1989US4832992 Process for the preparation of information recording medium
05/23/1989US4832980 Magneto-optical recording medium and manufacturing thereof
05/23/1989US4832487 Test system for optical disks
05/23/1989US4832464 Optical system with grating lens assembly for correcting wavelength aberrations
05/23/1989US4832456 Liquid crystal disc memory with circular grooves for auto-focusing of write-in beam
05/18/1989DE3737483A1 Method for the reuse of glass substrates for optically readable high-density storage masters
05/17/1989EP0316051A2 Optical readable storage disc
05/17/1989EP0316004A2 Optical disk and its manufacturing method
05/17/1989EP0315744A1 Photodetector for hologram-type optical head
05/16/1989US4831626 Laser beam recording apparatus
05/16/1989US4831615 Dual differential optical system moving apparatus
05/16/1989US4831613 Method and apparatus for reproducing recorded information by processing plural read-out signals obtained from plural sources acting on an information carrying member
05/16/1989US4831612 Optical disc reading apparatus
05/16/1989US4831611 Optical writing and reading method and apparatus
05/16/1989US4831609 Tracking method and apparatus for optical recording medium
05/16/1989US4831608 Multi-layer high density information recording carrier having a non-alkali inorganic glass protective layer
05/16/1989US4831244 Optical record cards
05/16/1989US4831243 Information memory apparatus for reading out information from a moving recording medium
05/16/1989US4831110 Low photoelasticity constant
05/16/1989US4830465 Irreversible optical recording media and fabrication thereof
05/16/1989CA1254300A1 Substrate for rigid disk storage media and method of manufacture
05/10/1989EP0315470A2 Focus search drive apparatus for an optical disc player
05/10/1989EP0315392A2 Data storage device having an encapsulated phase change memory medium and means for suppressing ablation thereof
05/10/1989EP0315195A2 Optical disc player
05/10/1989EP0314859A1 Magneto-optic memory device
05/10/1989CN1032877A Optical information recording media and optical recording systems
05/09/1989US4829509 Pressed graphite storage layer
05/09/1989US4829508 Carriage tilt control in an optical disk player
05/09/1989US4829506 Apparatus for optically scanning an information plane
05/09/1989US4829505 Multiple layer optical memory system using second-harmonic-generation readout
05/09/1989US4829503 Optical memory
05/09/1989US4829502 Automatic loading disc player
05/09/1989US4829499 Processing of a detection signal obtained by scanning an optical disk
05/09/1989US4829498 Limited duration focusing in a vehicular disk player
05/09/1989US4829168 Optical memory card
05/09/1989CA1253963A1 Electro-optical device
05/09/1989CA1253961A1 Expandable suspension for supporting a slider and moving it to the disk in a data recording disk file
05/05/1989WO1989004043A1 Optical data recording medium
05/05/1989WO1989004042A1 Optical head
05/05/1989WO1989004041A1 Apparatus for writing onto an optical memory card
05/03/1989EP0314512A2 Method for recording digital data
05/03/1989EP0314473A2 method of writing data in an optical storage medium
05/03/1989EP0314394A2 Disk drive with means to play either side of a disk
05/03/1989EP0314390A1 Semiconductor laser control circuit
05/03/1989EP0314010A2 Information recording disk
05/03/1989EP0313943A2 1,2-naphtalocyanine near-infrared absorbent and recording/display materials using same
05/03/1989EP0313818A2 Optical information reading apparatus
05/03/1989EP0313745A1 Tracking control circuit for an optical pick-up
05/03/1989EP0313744A1 Focusing method for an optical reading device
05/03/1989EP0313741A1 Apparatus for the reproduction of data
05/03/1989CN1004114B Photoelectric scanning head
05/02/1989US4827470 Information memory medium
05/02/1989US4827469 Optically readable information disk
05/02/1989US4827464 Slider servo device
05/02/1989US4827462 Modular data storage directories for large-capacity data storage units
05/02/1989US4827202 Method of and circuitry for automatically adjusting the variable-gain amplification in a control loop
05/02/1989US4826748 Electrophotographic sensitive member
05/02/1989US4826270 Optical scanning apparatus
04/1989
04/26/1989EP0313394A2 Method and apparatus for recording and reproducing information
04/26/1989EP0313248A2 Method for fabricating an optical system for optical polarization rotation
04/26/1989EP0313136A1 Apparatus for recording and/or reading recording tracks in a recording surface of a disc by means of a scanning unit, which disc rotates about an axis of rotation during operation
04/26/1989EP0312860A2 Resin material for optical instruments
04/26/1989EP0312652A1 Optical device with phase-locked diodelaser array
04/26/1989CN1032600A Data storage apparatus
04/26/1989CN1032599A Optical scanner
04/26/1989CN1004037B Apparatus for reproducing digital informatic via a transmission medium
04/25/1989US4825432 Frictionless moving device for an optical recording system in a high density spiral track-forming apparatus capable of resisting disturbing forces
04/25/1989US4825431 Disc reproducing apparatus
04/25/1989US4825430 Erasable optical data storage medium having an embedded servo track and a subsurface recording interface
04/25/1989US4825419 Method of deleting information
04/25/1989US4825408 Source of electromagnetic radiation
04/25/1989US4825304 Recording disc with sync information disposed in radial alignment
04/25/1989US4825064 Apparatus for energizing a semiconductor laser array having a plurality of light beam emitting points
04/25/1989US4825059 Apparatus for recording and reproducing information
04/25/1989US4825057 Portable laser diode scanning head
04/25/1989US4824947 Infrared radiation absorbers
04/25/1989US4824191 Optical pickup
04/20/1989WO1989003629A1 Information storage system
04/20/1989WO1989003578A1 Devices and process for producing microfilm and microfiche records
04/20/1989WO1989003577A1 Device for tracking an optical memory card
04/20/1989WO1989003576A1 Device for reading an optical card
04/20/1989DE3822099A1 Effecting accurate micro-manipulating
04/19/1989EP0312406A2 High-speed reproduction facility for audio programs
04/19/1989EP0312403A2 Optical system for preserving a state of polarization of light beam
04/19/1989EP0312339A2 Optical information recording media and optical recording systems
04/19/1989EP0312153A2 Playback apparatus for disc-shaped record carrier
04/19/1989EP0312120A2 Process for preparing moulding materials of acrylic resins with slight water absorption
04/19/1989EP0312105A2 Optical disk player
04/19/1989EP0312009A2 Card reader
04/19/1989EP0311859A2 Data storage apparatus
04/19/1989EP0311691A1 Optical recording/reproducing apparatus
04/18/1989US4823336 Optical disk drive
04/18/1989US4823335 Optical head device having deflection means including means for reducing reflected light angle
04/18/1989US4823334 Optical head with easily adjustable collimator having two lens components
04/18/1989US4823333 Optical disk duplicating apparatus using sector data identification information for controlling duplication
04/18/1989US4823331 Focusing detection apparatus
04/18/1989US4823330 Focus servo loop off-set compensation
04/18/1989US4823219 Carriage recording head sandwiched by electromagnetic coil sections
04/18/1989US4822151 Optical device with phase-locked diodelaser array
04/18/1989US4822139 Optical head apparatus for optical disc player
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