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)
09/1989
09/12/1989US4866689 Focusing and tracking error control system for an optical recording-reproducing device
09/12/1989US4866688 Composite tracking servo system for optical disc apparatus with track offset correction
09/12/1989US4866687 Optical disc access method and optical disk storage using coarse and fine actuators
09/12/1989US4866686 Optical record carrier and apparatus for reading the record carrier
09/12/1989US4866672 Information-recording thin film and method for recording and reproducing information
09/12/1989US4866541 Erasing of information signal from an optical disk
09/12/1989US4866540 Reproduction method for a disk player
09/12/1989US4865955 Using laser to crystallize amorphous antimony, aluminum, tin alloy with specific composition
09/12/1989US4865949 Optical information recording medium
09/12/1989US4865948 Base and thin film of an amorphous mixed metal oxide layer comprising vanadium oxide aas matrix
09/12/1989US4865445 Apparatus for detecting faults on the surface of a resist master disc and measuring the thickness of the resist coating layer
09/12/1989CA1259216A1 Optical head
09/06/1989EP0331477A2 Organic dye thin film and organic thin film element
09/06/1989EP0331475A2 Optical information processing apparatus with peak hold circuit for gain control signal
09/06/1989EP0331438A2 Process for coating a polycarbonate containing base
09/06/1989EP0331233A2 Method of manufacturing a laminated element and the element thus obtained
09/05/1989US4864630 Method and apparatus for reading data pages on a data surface
09/05/1989US4864555 Optical information carrier, method for erasing information therein, and optical storage device realizing this method
09/05/1989US4864554 Method of and device for scanning a radiation-sensitive surface of a rotating carrier with a radiation beam
09/05/1989US4864552 Driving signal for coarse servo employing sampled offset signal
09/05/1989US4864537 Polymers and dye combinations and methods for their use in optical recording
09/05/1989US4864423 Information recording disc and information signal recording apparatus therefor
09/05/1989US4864170 Linear motor
09/05/1989US4864118 Optical scanning unit with tracking error detection
09/05/1989US4864113 Information memory system for reading information from a moving recording medium
09/05/1989US4863819 Read-only optical data card
09/05/1989US4863246 Optical system and components for optical disk reader
09/05/1989US4863240 Apparatus for actuating objective lens
09/05/1989US4863228 Apparatus and a method of deflecting laser convergent light
09/05/1989CA1259134A1 Optical storage structure
09/05/1989CA1259133A1 Rotary recording medium having a guide track and recording and reproducing apparatus therefor
09/05/1989CA1258974A1 Optical recording medium and process for producing the same
08/1989
08/30/1989EP0330481A2 Method for detecting tracking error in optical disk system and its optical system devices therefor
08/30/1989EP0330476A2 Optical information processing apparatus for stopping tracking and/or focusing controls in an area having preformat signal recorded therein
08/30/1989EP0330414A2 Optical information processing apparatus for performing track jump while avoiding preformat signal
08/30/1989EP0330197A2 Optical disk
08/30/1989EP0328539A4 Transmissively read quad density otpical data system.
08/30/1989CN1035200A Information recording media
08/29/1989US4862447 Optical record carrier with surface layer extending to the center of a substantially circular information track structure therein
08/29/1989US4862446 Optical focus error control pickup device for an optical recording/reproducing system
08/29/1989US4862442 Focus detecting apparatus utilizing reflecting surface having variable reflectivity or transmissivity
08/29/1989US4862441 Carriage assembly
08/29/1989US4862440 Optical head with optical beam control using acoustic wave device
08/29/1989US4862439 Recording device that identifies recordable areas of a disk record
08/29/1989US4862414 Small diameter roll
08/29/1989US4862294 Disc erasing apparatus for selective erasure of disc tracks
08/29/1989US4861974 Card reader
08/29/1989US4861699 Photosensitive material on support plate, separation layer, and second photosensitive material
08/29/1989US4861697 Recording medium for optical data storage
08/29/1989US4861637 Optical information recording medium
08/29/1989US4861437 Method of manfacturing a mould and providing it with a backing and mould manufactured according to the invention
08/29/1989US4861139 Apparatus for positioning an optical element
08/29/1989US4861138 Device for driving optical parts of an optical pickup
08/29/1989US4861128 Optical pickup using a waveguide
08/29/1989CA1258909A1 Optical information recording medium and method for recording information on said medium and reproducing information therefrom
08/29/1989CA1258906A1 Semiconductor laser apparatus for optical head
08/29/1989CA1258905A1 Slidable carriage mount for disc memory apparatus
08/24/1989WO1989007822A1 Optical storage devices
08/24/1989WO1989007821A1 Optical storage devices
08/24/1989WO1989007787A1 Method of preparing substrate having pattern formed thereon
08/23/1989EP0329450A2 Optical record medium having an improved reflection thin film
08/23/1989EP0329431A2 Optical information processing apparatus
08/23/1989EP0329426A2 Optical card and manufacturing method thereof
08/23/1989EP0329425A2 Optical recording medium and manufacturing method thereof
08/23/1989EP0329396A2 Polymeric polymethine dyes and optical data storage media containing same
08/23/1989EP0329304A2 Optical recording
08/23/1989EP0329234A1 Electro-optical device
08/23/1989EP0329122A2 Method for affixing information on read-only optical disks
08/23/1989EP0328556A1 Spherical pivoting actuator for read/record head
08/23/1989EP0328539A1 Transmissively read quad density otpical data system
08/22/1989US4860278 Optical recording carrier, and recording-reading apparatus, and recording-reading process, employing the same
08/22/1989US4860276 Micro optical head with an optically switched laser diode
08/22/1989US4860275 Optical recording card and method of reading the same
08/22/1989US4860274 Information storage medium and method of erasing information
08/22/1989US4860273 Method of recording information and information recording medium employed for the same
08/22/1989US4860272 Erroneous track jump restoration apparatus for optical record disc player
08/22/1989US4860271 Servo circuit for generating a tracking error signal for optical disk player
08/22/1989US4860137 Flexure-mounted radial access apparatus for disk recorder/player
08/22/1989US4859847 Photo detector adjustment device
08/22/1989US4859569 Optical recording medium
08/22/1989US4859033 Method of producing optical head assembly
08/16/1989EP0328501A1 Apparatus and method for acquiring focus in an optical system
08/16/1989EP0328368A2 Improved data storage medium
08/16/1989EP0328354A2 Optical information processing apparatus
08/16/1989EP0328212A1 Method of manufacturing a metal matrix and a master disc suitable for the manufacture of matrices
08/16/1989EP0327951A2 Polycarbonates with aralkyl phenyl end groups, their preparation and their use
08/16/1989EP0327888A2 Process for producing on a surface a thin, X-rays-amorphous layer of aluminium nitride or of aluminium-silicon nitride
08/16/1989EP0111010B1 Optical disc reproducer
08/15/1989US4858235 Information storage apparatus
08/15/1989US4858221 Preformatted information medium and optical reader device
08/15/1989US4858220 Laser control circuit for optical data recording/reproduction apparatus
08/15/1989US4858219 Optical information recording reproducing memory system with both power control and optical irradiation inhibiting circuit
08/15/1989US4858217 Optical disk recording and reproducing device
08/15/1989US4858216 Optical pickup control device
08/15/1989US4858215 Integrated optical disc pickup that allows variations in the wavelength of the laser beam
08/15/1989US4858214 Tracking control apparatus
08/15/1989US4858041 Tracking servo control
08/15/1989US4857719 Flat type optical head for focusing a light beam onto an optical memory
08/15/1989US4857427 Recording medium
08/15/1989US4857373 Optical recording element
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