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)
06/1993
06/15/1993US5220459 Optical disk driving with inertial damping spring supporting lens holder
06/15/1993US5220222 Magnetic bushings for an optical access actuator
06/15/1993US5220027 Sulfone-containing azamethide compounds with a nitrogen-containing aromatic ring of nitrogen containing aliphatic
06/15/1993US5220010 Heating a solution of a 3-sec-alkoxyphthalonitrile and a basic catalyst and adding a metal compound
06/15/1993US5219708 Optical disk
06/15/1993US5219707 Photostable cyanine dye and optical recording medium
06/15/1993US5219706 Naphthalocyanine derivative and production process thereof, as well as optical information recording media using the derivatives and production process thereof
06/15/1993CA1319194C Focusing error detector and optical data detecting device incorporating the focusing error detector
06/15/1993CA1319193C Signal reproducing circuitry and signal reproducing method for optical disc player
06/15/1993CA1319052C Thin film structure having magnetic and color shifting properties
06/11/1993CA2084858A1 Process for optically storing information
06/10/1993WO1993011536A1 High fidelity sound reproduction device for cinematographic films
06/10/1993WO1993011533A1 Resin material reclaimed from optical recording disk and method of reclaiming same
06/10/1993WO1993011474A1 Control method and circuit
06/10/1993WO1993011470A1 Oriented biological material for optical information storage and processing
06/09/1993EP0545905A2 Optical pickup element
06/09/1993EP0545735A1 An optical pickup apparatus and a hologram element used for same
06/09/1993EP0545713A1 Apparatus for adjustable correction of spherical aberration
06/09/1993EP0545532A1 Computer system utilising compact intelligent disks
06/09/1993EP0545526A1 Optical pickup apparatus
06/09/1993EP0545524A1 Hologram system
06/09/1993EP0545472A1 Closed information system with physical copy protection
06/09/1993EP0545371A1 Optical tape
06/09/1993EP0545235A1 Reversibly crosslinked, orientable liquid crystalline polymers
06/09/1993EP0545133A2 Optical pickup device and focusing servo device employed therein
06/09/1993EP0544731A1 Optical scanning device.
06/09/1993DE4139945A1 Regelverfahren und regelkreis Control method and loop
06/09/1993CN1021155C Compatible light-making disc
06/08/1993US5218599 Method of recording and reproduction of information using a recording medium available for information overlap recording, a recording medium and a recording and reproducing apparatus using the method
06/08/1993US5218597 Optical reading and writing device
06/08/1993US5218596 Optical disc apparatus having a particular lasar source orientation
06/08/1993US5218595 Device for reading oblong segments of an advancing storage medium
06/08/1993US5218594 Recording medium with an optical waveguide and player for playing the same
06/08/1993US5218591 Optical disk apparatus for shaping pits recorded on an optical disk
06/08/1993US5218590 Optical disk apparatus having improved recording capacity
06/08/1993US5218589 Defect detecting method
06/08/1993US5218588 Focus offset correction method
06/08/1993US5218587 Magnetic optical recording/reproducing apparatus
06/08/1993US5218586 Optical recording and reproducing apparatus
06/08/1993US5218585 Phase shifting feedback control in an optical disk drive
06/08/1993US5218584 Integrated optical head structure
06/08/1993US5218582 Magneto-optic readout using a polarization-preserving optical guide
06/08/1993US5218524 Optical disk apparatus
06/08/1993US5218483 Objective lens moving apparatus
06/08/1993US5218453 Optical disc access control apparatus
06/08/1993US5218400 Developing apparatus of photoresist
06/08/1993US5217856 Tetraazaporphin, process for producing the same, as well as optical recording media using the same and production processes thereof
06/08/1993US5217850 Optical recording disk and manufacturing method thereof
06/08/1993US5217844 Optical recording medium, method of producing the same and method of producing the optical recording card
06/08/1993US5216925 Apparatus for non-intrusive continuous and automatic taking of samples, storing and supplying of samples and data for a possible evaluation
06/05/1993CA2083976A1 Optical tape
06/02/1993EP0544529A1 Apparatus and process for manufacturing substrate sheet for information recording mediums
06/02/1993EP0544504A2 A disc reproducing apparatus and recording apparatus
06/02/1993EP0544299A2 Data recording/reproducing apparatus capable of simultaneously performing both reproducing and recording from and in a single recording medium
06/02/1993EP0544276A2 Writable optical disk recording apparatus
06/02/1993EP0544090A1 Method for recording a digital audio signal on a motion picture film
06/02/1993EP0544017A1 Method for recording on disc
06/01/1993US5216665 Information recording medium
06/01/1993US5216664 Optically readable disc with a centering member fixed to a transparent substrate
06/01/1993US5216660 Method of optimally controlling the power of a recording laser beam
06/01/1993US5216659 Laser power calibration by measuring laser drive current at out of focus and in focus conditions
06/01/1993US5216658 Enlarged-spot erasure of optical media in dual-beam systems
06/01/1993US5216657 Method and apparatus for timing variable optical information recording
06/01/1993US5216656 Method for recording a cd-ram which is compatible with a conventional cd recording format while allowing fast accessing
06/01/1993US5216653 Driving device for objective lens
06/01/1993US5216652 Light spot position detector
06/01/1993US5216651 Pickup-drive stabilizing apparatus for an optical disc player
06/01/1993US5216650 Track jumping control apparatus
06/01/1993US5216649 Optical head with a tilt correction servo mechanism
06/01/1993US5216648 Objective lens drive apparatus applicable to optical disk apparatus
06/01/1993US5216647 Target track position retrieval device
06/01/1993US5216646 Tracking system in recording/reproducing apparatus
06/01/1993US5216562 Multi-beam optical recording system and method
06/01/1993US5216534 Read-write head for an optical tape recorder
06/01/1993US5216219 Disk manufacturing apparatus
06/01/1993US5215868 Method for recording information via photo-recording medium
06/01/1993US5215862 Recording medium for information
06/01/1993US5215808 Optical tape recording media with integral dust-defocusing transparent film
06/01/1993US5215800 Transparent crosslinked polymer, rubbery state above glass transition temperature, dye which absorvs radiation and converts it to heat
06/01/1993US5215799 Minimization of impurities and terminal hydroxyl groups, inhibits deterioration of polycarbonate resin
06/01/1993US5215798 Injection molded copolymer of ethylene and a cyclic olefin; dimensional stability; solvent resistance; high output; low noise level
05/1993
05/27/1993WO1993010529A1 System for thermally erasing data stored on an optical recording medium
05/27/1993WO1993010528A1 Optical disk
05/27/1993WO1993010527A1 Magnetooptical disk apparatus and recording medium
05/27/1993WO1993008500A3 Optically encoded phase matched second harmonic generation, self frequency doubling laser material, and holographic optical memory using semiconductor microcrystallite doped glasses
05/27/1993WO1993003427A3 Photorefractive systems and methods
05/26/1993EP0543800A2 Magneto optical memory element
05/26/1993EP0543707A1 Track access and tracking system for optical disc
05/26/1993EP0543667A1 Optical recording method of audio data
05/26/1993EP0543580A2 Magneto-optical recording apparatus capable of reproducing recording information while recording
05/26/1993EP0543557A1 Optical pickup and tilt control device therefor
05/26/1993EP0543505A1 Plural-beam optical head
05/26/1993EP0543481A2 Optical information-reproducing apparatus using separately located photodetector assemblies
05/26/1993EP0543465A2 Chemical compounds with spin transition and use of these for information storing, processing and/or data display
05/26/1993EP0543446A1 Information recording device, record carrier and information reading device
05/26/1993EP0543295A2 Optical disk player
05/26/1993CN1020977C Recording system as well as record carrier and recording appratus for use in system
05/25/1993US5214636 Optical recording element having a plurality of thin film filtering layers and optical recording element having an electrically conductive layer
05/25/1993US5214635 Erasable optical disk and optical information recording/reproduction apparatus
05/25/1993US5214634 Optical disc apparatus for recording and reproducing signals on both surfaces of a disk with a single optical pickup