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)
05/1994
05/25/1994EP0598633A1 Handling and processing system for workpieces in individual boxes
05/25/1994EP0598611A2 Optical recording and reproducing apparatus
05/25/1994EP0598594A2 Disk drive system controller
05/25/1994EP0598592A2 Laser emission unit, optical head and optical memory device
05/25/1994EP0598575A2 Optical recording medium and production thereof
05/25/1994EP0598392A1 Digital audio signal transforming method and apparatus
05/25/1994EP0598377A2 Magneto-optical recording medium and optical information recording and reading-out method
05/25/1994EP0598096A1 Recording media.
05/25/1994EP0318566B2 Optical scanning head
05/24/1994US5315579 Recording disk hub bond
05/24/1994US5315577 Optical recording/reproducing by changing perpendicular magnetic anisotropy to non-perpendicular magnetic anisotropy
05/24/1994US5315576 Optical pick-up device for optical disc player
05/24/1994US5315575 Optical information recording apparatus
05/24/1994US5315574 Optical head with polarized beam hologram
05/24/1994US5315573 Non-linear optical saturable absorber layer in an optical disk to discriminate wavelength above or below a threshold level of intensity
05/24/1994US5315572 Information reproducing apparatus capable of eliminating jitters
05/24/1994US5315571 Information recording and reproducing device providing faster access time to a recording medium
05/24/1994US5315570 Optical disk reproducing apparatus which automatically determines the format type of the optical disk
05/24/1994US5315569 Apparatus for recording and/or reproducing information on/from optical card-like information recording medium
05/24/1994US5315568 Apparatus and method for accessing sectors of a rotating disk
05/24/1994US5315567 Optical disk formatting system using index mark detecting circuit
05/24/1994US5314757 Information recording media
05/24/1994US5314734 Recording due to change in atomic arrangement upon irradiation with a laser beam
05/24/1994US5313882 Multicolor printing system for the silk-screen printing of compact discs
05/24/1994CA2102688A1 Method for removing coatings from compact discs
05/24/1994CA2011377C Beam track position control apparatus for optical disk apparatus
05/18/1994EP0597826A2 Data recording medium
05/18/1994EP0597705A1 Optical encoder
05/18/1994EP0597697A1 Tracking servo circuits
05/18/1994EP0597656A2 Optical data storage system and method
05/18/1994EP0597483A1 Disc playback method
05/18/1994EP0597339A1 Disc recording/reproducing apparatus
05/18/1994EP0597202A1 Optical pickup head apparatus
05/18/1994EP0215839B1 Efficient holograms and method for making same
05/18/1994CN1024603C Information recording system and recording device and record carrier
05/17/1994US5313612 Information recording and reproducing apparatus including both data and work optical disk drives for restoring data and commands after a malfunction
05/17/1994US5313452 Optical recording disk
05/17/1994US5313450 Optical disk drive
05/17/1994US5313449 Optical recording medium and method of optically playing back same including recording medium structure operating as optical resonators emitting applied pumping light at a variable frequency
05/17/1994US5313448 Laser device driven by a periodic waveform optimized for reducing laser noise
05/17/1994US5313447 Optical head
05/17/1994US5313445 Reproducing apparatus with suspension supporting a floating-type head with a bevelled slider
05/17/1994US5313442 Optical disk drive having tracking control and mirror supported on a circular path
05/17/1994US5313441 Optical recording and reproducing apparatus having a pickup head including a main prism with reflecting surfaces for splitting the reflected beam
05/17/1994US5313440 Track crossing method using dual counters
05/17/1994US5313334 Objective lens moving actuator
05/17/1994US5313332 Flexure suspension for two axis actuator
05/17/1994US5313321 Optically switching ferroelectric liquid crystal light valve having a pre-tilt angle of 60 to 80 degrees
05/17/1994US5313011 Apparatus for carrying out automatic play in synchronism with playback of data recorded on recording medium
05/17/1994US5312906 Disazo dyes
05/17/1994US5312718 Method of manufacturing dies for pressing optical disks
05/17/1994US5312714 Multilayer element with substrate, adhesive of ethylene and acrylic derivative copolymer for laminate
05/17/1994US5312713 Decoloring reaction of oxo metallic phthalocyanine pigment and pyrolysis
05/17/1994US5312664 Films of antimony/tin alloys containing carbon and hydrogen; higher amorphous to crystalline transition temperature, stability
05/17/1994US5312663 A disk comprising a supports laminated with multilayer of a recording layer, a reflective layer and two protective layers having good adhesion
05/17/1994CA1329507C Etched glass and process of manufacturing same
05/11/1994WO1994010684A1 Optically readable information disc including visible ornamental hologram, and method of fabricating same
05/11/1994EP0596716A2 Magneto-optical recording medium and recording and reproducing method and optical head designed for the magneto-optical recording medium
05/11/1994EP0596501A2 Tracking method for an optical disk
05/11/1994EP0596439A2 Method of making a master disc usable for the production of optical discs
05/11/1994EP0596417A2 Memory controller, reproducing apparatus, mounting the same and method for controlling the same
05/11/1994EP0596413A2 Method of making a plurality of optical record disc substrates, and an apparatus therefore
05/11/1994EP0596339A1 Optical recording medium
05/11/1994EP0596139A1 Optical disk recorder/reproducer
05/11/1994EP0595999A1 Method for three-dimensional optical storage and retrieval of data
05/11/1994EP0278006B1 A disc device and a disc-like recording medium
05/11/1994DE4234926A1 Audio and/or video recording system with special effects facility
05/10/1994US5311500 Alkyl fluoride-acrylic copolymer moisture barrier
05/10/1994US5311499 Method and apparatus for erasing information from optical recording tape with a thermo-deforming layer
05/10/1994US5311498 Recording and reproducing apparatus provided in each data block with a secret information number
05/10/1994US5311497 Pickup feeding apparatus for a double-sided reproducing disc player
05/10/1994US5311496 Achromatic expansion prism for magneto-optical drive
05/10/1994US5311495 Optical system for converging light beams to form a single beam spot on an optical disc
05/10/1994US5311494 Optical disk apparatus and optical head
05/10/1994US5311491 Method of data recording for optical disc having burst modulated track
05/10/1994US5311490 Access controlling device for use in an optical disk drive
05/10/1994US5311489 Optical head for recording, reproducing, or erasing information having fixed and movable head units
05/10/1994US5311474 Random access optical storage
05/10/1994US5310333 Roll stamper for molding substrate used for optical recording medium
05/10/1994CA2012401C Focus-error detection using prism-enhanced spot size monitoring
05/05/1994DE4229249A1 Optically-readable information carrier, e.g. CD - has metallised foil of, e.g. aluminium@, on base and uses UV radiation for mass hardening by thermo-mechanical process
05/04/1994EP0595785A1 Electro-magnetic actuator and optical disk
05/04/1994EP0595626A2 Recording condition determination method and apparatus upon execution of over-write operation on magnetooptical disk by heat shut off method and pulse train method, and magnetooptical recording method and apparatus
05/04/1994EP0595625A2 Prepulse condition/heat shut off condition determination method and apparatus for optical recording, and optical recording method and apparatus
05/04/1994EP0595349A1 Optical disk
05/04/1994EP0595322A1 Optical information recording or reproducing apparatus
05/04/1994EP0595055A2 Disk replication apparatus
05/04/1994EP0594952A1 Focus error detecting element and optical head using the same
05/03/1994US5309461 Compensated laser drive circuit
05/03/1994US5309425 Signal processing circuit for optical disk apparatus
05/03/1994US5309424 Optical recording apparatus recording beam controlled in response to reduced light level reflected between successively formed pits
05/03/1994US5309422 Light separation element and light receiving optical device using same
05/03/1994US5309421 Recording and/or reproducing apparatus for optical disk
05/03/1994US5309420 Discriminator for detecting signal presence on optical media
05/03/1994US5309419 M-O disk recording apparatus with light amount control based on multiple test performed on a test region at multiple disk rotational velocities
05/03/1994US5309418 Track counting device using a PLL
05/03/1994US5309417 Information recording/reproducing apparatus for optical information recording medium
05/03/1994US5309415 Information recording method for overwriting a magneto-optic recording medium with two intensities of light beams
05/03/1994US5308961 Optical-card reader
05/03/1994US5308235 Roll stamper and apparatus for forming a substrate for information recording medium