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)
10/1991
10/30/1991EP0453995A2 Optical disc recording apparatus
10/30/1991EP0453681A2 Optical information reading apparatus
10/30/1991EP0453576A1 Optical pickup apparatus and optical reproducing apparatus
10/30/1991EP0148238B1 High energy beam sensitive glasses
10/30/1991CN1014566B Process for producing magnetic hub
10/30/1991CN1014562B Optical disc
10/30/1991CN1014561B Optical data storage media with spatially variable energy absorptivity
10/29/1991US5062098 Optical pick-up device having holographic element
10/29/1991US5062096 Optical head and tracking method using same
10/29/1991US5062095 Actuator and method of manufacturing thereof
10/29/1991US5062094 Optical head for optical disk system
10/29/1991US5061796 Optical recording media
10/29/1991US5061597 Oxidation resistance, high recording sensitivity and durability
10/29/1991US5061596 Homogeneity, adhesion, stability
10/29/1991US5061582 Optical data storage
10/29/1991US5061563 Information storage medium comprising a recording film containing tellurium chemically bonded to an organic carbon
10/29/1991US5061536 Optical recording medium
10/29/1991US5061003 Cover for automobile sun visor mirrors
10/29/1991CA1291565C Optical recording medium
10/29/1991CA1291562C Method and apparatus for seeking target address with error check code
10/29/1991CA1291336C Optical recording element
10/29/1991CA1291335C Compatible polymers, and use of same for registering optically readable information
10/23/1991EP0453343A1 Pregrooved information medium with offset pits, method of making the pits, method for extracting a tracting error signal and reproducing apparatus for realizing this method
10/23/1991EP0453323A2 Optical pickup device
10/23/1991EP0453308A2 Reducing amplitude variations of optical disk readback signals
10/23/1991EP0453223A2 Automatic loop gain control apparatus
10/23/1991EP0453161A2 Optical recording apparatus
10/23/1991EP0453108A2 Player for audio disk and memory disk
10/23/1991EP0452953A2 Optical head
10/23/1991EP0452884A2 A rewritable optical disc
10/23/1991EP0452793A2 Optical head having a hologram associated with the objective lens
10/23/1991EP0452586A2 Optical recording medium
10/23/1991EP0363422B1 Integrated optical read/write head and apparatus incorporating same
10/23/1991EP0294461B1 Solid particle dispersion filter dyes for photographic compositions
10/22/1991US5060223 Optical type information recording medium having specified pit and guide groove shapes
10/22/1991US5060222 Method of overwriting information on recording medium
10/22/1991US5060220 Protection circuit for optical disc players
10/22/1991US5060219 Recording system for recording only those types of information which are specified by the record carrier
10/22/1991US5060218 Write-once type optical recording/reproducing device
10/22/1991US5060217 Optical head devices for use in recording and/or reproduction of information
10/22/1991US5060216 Tracking control system for use in an optical reading apparatus
10/22/1991US5060215 Method and apparatus for leading-in focus servo by moving the objective lens toward the recording surface at two different speeds
10/22/1991US5060214 Optical pickup device keeping coincident the optical axes of the objective lens and of the recording/reproducing beam
10/22/1991US5060213 Separation type optical head
10/22/1991US5060212 Integrated optical pick-up device
10/22/1991US5060210 Controlling head seeking speed in disk storage units by limiting displacement of head with respect to its supporting headarm
10/22/1991US5060209 Optical information recording and reproducing apparatus with vibration attenuating mechanism
10/22/1991US5059780 Light power control circuit for a semiconductor light-emitting element
10/22/1991US5059774 Seek and track control for a rectangular optical card handling apparatus
10/22/1991US5059510 Media for optical information storage comprising an organic macrocyclic chromophore substituted with a film conferring organic substituent
10/22/1991US5059473 Transparent protective plates
10/22/1991US5059462 Information recording medium
10/22/1991US5059461 Reduction of foreign substances in polycarbonate disks
10/22/1991US5059000 Image forming medium and image forming apparatus using same
10/22/1991US5058610 Fluid supplying and processing device
10/18/1991WO1991016708A1 Production method of magnetooptical recording medium and magnetooptical recording medium
10/18/1991CA2058923A1 Magnetooptical recording medium and process for the preparation thereof
10/17/1991DE4037732A1 Tracking control for optical head - uses two sensors to monitor laser beam and control position
10/16/1991EP0452063A2 Optical integrated device for magneto-optical reproducing head
10/16/1991EP0452028A2 Optical head with improved tracking and focusing error control means
10/16/1991EP0451881A2 Optical data carrier
10/16/1991EP0451858A2 Molded article of norbornene-based polymer
10/16/1991EP0451809A1 Compatible polymer compositions containing polystyrene and cyclopentyl(meth)acrylate polymer
10/16/1991EP0451773A2 Linear motor
10/16/1991EP0451733A1 Method of driving a laser diode for an optical card recording/reproducing apparatus
10/16/1991EP0451718A1 Compact disk-write once type optical recording media
10/16/1991EP0451386A1 Data storage
10/16/1991EP0318566B1 Optical scanning head
10/15/1991US5058098 Copper-nickel alloy
10/15/1991US5058097 Slider controller for disk player including a slider which is driven by a linear motor
10/15/1991US5058096 Disk recording/reproducing apparatus and disk recording/reproducing method
10/15/1991US5058093 Signal level deviation detecting apparatus
10/15/1991US5058092 Method for accessing a control track by positioning an optical head at the center of the control track
10/15/1991US5058091 Optical pickup device
10/15/1991US5058089 Memory disk and apparatus for recording information on memory disk
10/15/1991US5058061 Erasing or stable retention
10/15/1991US5056891 Method of preparing information reading apparatus and objective lens suspension body
10/15/1991CA1290848C Optical memory
10/14/1991CA2040041A1 Molded article of norbornene-based polymer
10/12/1991CA2025435A1 Compatible disk player
10/09/1991EP0450961A2 Substrates for optical cards, process for preparing substrates for optical cards, optical cards and apparatus for recording and reproducing information on optical cards
10/09/1991EP0450745A1 Composite disk playing method
10/09/1991EP0450655A1 Apparatus for recording information on and/or reproducing information from optical disc
10/09/1991CN1055265A Non-contact-guidable magnetic floating device
10/08/1991US5056081 System and method for erasing light-responsive optical disks
10/08/1991US5056080 Optical recording/reproducing system using interference techniques
10/08/1991US5056079 Multi-state optical contrasts in optical recording media for data compression
10/08/1991US5056075 Optical disk player with disk size and pickup location responsive skew servo control
10/08/1991US5056074 Tracking servo system with a variable equalizing characteristic
10/08/1991US5056072 Seek apparatus for optical disc drive
10/08/1991US5055576 Photochromatic and thermochromatic spiro-oxazepin-oxazine compounds and the process for their preparation
10/08/1991US5055356 Chelate compound
10/08/1991US5055331 Phase-change optical recording media
10/08/1991US5054568 Auxiliary steering control apparatus
10/04/1991CA2039527A1 Pre-etched information medium with offset marks, method for making the marks and method for preparing a radial tracking error signal and reading device for the implementation of the method
10/03/1991WO1991014996A1 Reader/writer for flexible data cards
10/03/1991WO1991012610A3 Stabilization of optical information storage media by incorporation of nitrogen containing compounds
10/02/1991EP0449517A1 Optical disc
10/02/1991EP0449462A2 Roll stamper for moulding substrate sheet for information recording mediums, procedure for preparation of the same, and procedure for producing substrate sheets for information recording mediums
10/02/1991EP0449291A2 Process for the creation of selective fluorescent sites or regions in parylene films and coatings
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