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)
06/1994
06/21/1994US5322754 Imaging members containing titanium phthalocyanines
06/21/1994US5322750 Optical recording medium
06/21/1994US5322747 Method of manufacturing an optical disc
06/16/1994DE4242247A1 Data carrier - has optical disc storage contg. encrypted data on spiral tracks read by laser, with key stored in associated microprocessor
06/16/1994DE4241619A1 Polycarbonate prepn. by interfacial polycondensation - with phosgenation of an aq. soln. of bisphenol in three stage reaction and feeding back aq. reaction phase to first step
06/16/1994DE4241379A1 Operating mode changeover method for transportable equipment - triggering changeover between transport and stationary operating modes according to detected shocks
06/15/1994EP0601894A1 Disc reading method and disc reading apparatus
06/15/1994EP0601862A1 An optical device formed of multiple film layers
06/15/1994EP0601746A2 Process and apparatus for manufacturing substrate sheet for optical recording mediums, process for preparing stamper and process for preparing photomask
06/15/1994EP0601719A1 Treatment of compact discs
06/15/1994EP0601567A2 Optical pickup device for magneto-optical recording and reproducing system
06/15/1994EP0436656B1 Single stage seek method
06/15/1994EP0435754B1 Method of linking coded data to be recorded on a writable optical disc
06/15/1994EP0256110B1 Apparatus and method for increasing storage capacity of recording media
06/15/1994CN1025084C Anti-skating control of positioning servo system
06/15/1994CN1025078C Grating objective and grating-beam shaper and optical scanning device comprising at least are of said elements
06/14/1994US5321824 Accessing last recorded data in a continuation chain
06/14/1994US5321684 Bidirectional sinusoidal scanning system
06/14/1994US5321683 Digital optical tape read system
06/14/1994US5321682 Method of and device for recording information on a record carrier having a recording layer which, when heated, undergoes an optically detectable change
06/14/1994US5321681 Apparatus for recording, storing and electronically accessing images
06/14/1994US5321679 Apparatus for recording and/or reproducing information on and/or from record medium by using pick-up and method of resetting operational condition of the same
06/14/1994US5321678 Optical head carriage, tracking mechanism and displacement detecting mechanism
06/14/1994US5321677 High-speed search apparatus for use with a video disk player
06/14/1994US5321676 Record carrier scanning apparatus wherein the scanning head is positioned without feedback and a predetermined range of fine positioning of the scanning point is maintained
06/14/1994US5321675 Pit spacing in the servo field of an optical disk for speed and direction detection and data retrieval
06/14/1994US5321673 Partial ROM type optical disk and its recording and reproducing apparatus
06/14/1994US5321550 Optical system of optical information recording/reproducing apparatus
06/14/1994US5321549 Cleaning apparatus for an object lens
06/14/1994US5321519 Crosstalk detector for optically read signals
06/14/1994US5321501 Method and apparatus for optical imaging with means for controlling the longitudinal range of the sample
06/14/1994US5321254 Light-receiving and amplyfying device capable of widening an AC operation range
06/14/1994US5320936 Photo responsive material employing a thiophene derivative having long conjugated chain at 3-position
06/14/1994US5320930 Optical recording medium and process for recording thereon
06/14/1994US5320876 Patterns from stamper to uv curable resin on base plate; optical recording media
06/14/1994US5320875 Plasma polymerizing organosilicon monomer in presence of excess oxygen
06/14/1994US5320787 Apparatus and process for manufacturing substrate sheet for information recording mediums
06/14/1994US5320515 Apparatus for defacing compact discs
06/14/1994US5320514 Roll stamper, and apparatus and process for manufacturing substrate sheet for information recording mediums by using the same
06/09/1994WO1994012977A1 Disk read-out circuit
06/09/1994DE4240313A1 Improved flow polycarbonate(s) for optical data carriers - having Tg 140 deg. C or above and specified melt viscosity
06/09/1994DE4235676A1 Chamber and chamber combination for transfer of at least one component - with a component holding element swivelled through a chamber opening
06/08/1994EP0600737A2 Disc device
06/08/1994EP0600677A1 Cinefilm and recording and reproduction thereof
06/08/1994EP0600623A2 Servo loop control
06/08/1994EP0600427A1 Optical information recording medium and composition for optical information recording film
06/08/1994EP0600426A2 Apparatus with light-emitting element and method for producing it
06/08/1994EP0600238A1 Optical disc recording/reproducing apparatus
06/08/1994EP0600086A1 Injection-molded thermoplastic saturated norbornene resin, substrate of information medium element made therefrom, and information medium element
06/08/1994EP0599901A1 Optical scanning device.
06/08/1994EP0513062B1 Data storage medium and methods for recording and reading of data
06/08/1994EP0504158B1 Circuit arrangement for operating a light source for the optical scanning of recording substrates
06/07/1994US5319629 Content addressable optical data storage system
06/07/1994US5319628 Device for recording an information signal and a related auxiliary signal
06/07/1994US5319627 Method for managing a defect in an optical disk by assigning logical addresses based upon cumulative number of defects in the disk
06/07/1994US5319626 Method for rewriting defect management areas on optical disk according to ECMA standard
06/07/1994US5319625 Apparatus using demodulators to detect crosstalk from a signal read from a recording medium
06/07/1994US5319624 Electromagnetic actuator and optical disk apparatus incorporating the same
06/07/1994US5319623 Data-track search apparatus for locating a desired data track on a record carrier
06/07/1994US5319622 Control and information disk for disk recording system
06/07/1994US5319507 Recording/reproducing system using a flexible magnetic disk
06/07/1994US5319497 Lens drive device with lens holder carrying drive flux generating magnets
06/07/1994US5319481 Encapsulated liquid crystal optical read/write storage medium and system
06/07/1994US5319034 Process for making a polymer for an optical substrate by hydrogenating a cycloolefin copolymer
06/07/1994US5318882 Optical recording medium containing a light stabilizer comprised of aryl nitrogen compound
06/07/1994US5318653 Applying adhesive that cures at room temperature, slowly bring first and second disk into contact, curing adhesive
06/07/1994CA2001770C Optical recording media
06/07/1994CA2001769C Optical recording media
06/01/1994EP0599807A1 Position detector
06/01/1994EP0599806A1 Position detector
06/01/1994EP0599655A1 A protective cover for a compact disc
06/01/1994EP0599406A1 Injection moulding or injection compression moulding machine
06/01/1994EP0599392A1 Scanning device with two-stage controller for positioning a scanning point
06/01/1994EP0599389A2 Method and recording device for recording signals on a record carrier
06/01/1994EP0598761A1 Photorefractive systems and methods
06/01/1994EP0340221B1 Multiple card recording system
06/01/1994DE4239776A1 Injection or injection compression machine for prodn. of information=carrying discs - has two or more adjacent tools each supplied with polymer from separate injection units
06/01/1994CN1024856C Optical disc recording apparatus
05/1994
05/31/1994US5317557 Optical head for recording and reproducing information on and/or from optical record medium
05/31/1994US5317556 Information processing apparatus and optical head incorporated therein
05/31/1994US5317554 Magazine loader having an ejector arm
05/31/1994US5317553 Optical disc recording and/or reproducing apparatus having a buffer memory to accommodate track jumps
05/31/1994US5317552 Linear actuator for driving an optical head incorporated in an optical disk
05/31/1994US5317551 Optical disk head including a light path having a thickness and width greater than the light beam wavelength by a predetermined amount
05/31/1994US5317550 Apparatus and method for track access
05/31/1994US5317549 Information recording and reproducing apparatus
05/31/1994US5317149 Optical encoder with encapsulated electrooptics
05/31/1994US5317144 Wave front aberration measuring apparatus having means for adjusting position of collimator lens
05/31/1994US5317143 Optical data medium driving apparatus and a servo circuit with normalization processing
05/31/1994US5317139 Film optical code reader having clock and data sensors
05/31/1994US5316900 Multilayer element with recording, reflecting layers and birefringent layers
05/31/1994US5316899 Two oxa-cyanine dyes of specific light absorption distribution s
05/31/1994US5316852 Coated material and the use thereof
05/31/1994US5316814 Write-once compact disks
05/31/1994US5316813 Uses photochemical hole burning; anthraquinone derivatives as guest molecules and polyhydroxyalkyl (meth)acrylates
05/31/1994US5316806 Liquid crystal polymers
05/31/1994CA2009088C Optical recording medium, optical recording method and optical recording device used in method
05/28/1994CA2109902A1 Protective cover for a compact disc
05/26/1994WO1994011869A1 Device for driving optical part
05/26/1994WO1994011301A1 Carbon fluoride particles, process for producing the same, and use thereof