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)
04/1990
04/11/1990CN1041235A Optical disk reproducing device and optical disk reproducing method and composite recording medium
04/11/1990CN1007559B Record carrier and apparatus for mfg. the same
04/10/1990US4916684 Head drive arrangement for a data reproducing apparatus
04/10/1990US4916683 Optical recording/reproducing apparatus with means to shift light beam periodically to prevent record medium deterioration
04/10/1990US4916465 Binary optical signal recorder providing preheating pulse before an initial write pulse
04/10/1990US4916300 Optically readable/writable card
04/10/1990US4916234 Chromogenic dicyanomethylenepyrazolinones
04/10/1990US4916048 Variations from low to high optical density
04/10/1990US4915997 Multilayer sealed structure; adhesive is epoxy resin and organosilicon polymer
04/10/1990US4915982 Vapor depositing mixture of alkaline earth metal sulfides and two dopants; heating to crystallize
04/10/1990US4915484 Anamorphic single lens
04/10/1990CA1267725A1 Optical information recording-reproducing apparatus and method
04/10/1990CA1267724A1 Optical storage device and method of manufacturing
04/10/1990CA1267723A1 Prewritten data storage medium and optical scanning device therefor
04/05/1990WO1990003642A1 Connectorless hermetic optical disk system
04/05/1990DE3932460A1 UV-curable coating material with good scratch resistance - contains poly(meth)acrylate, (meth)acrylic acid, diol di:(meth)acrylate and suitable photoinitiators
04/05/1990DE3833314A1 Optical data store with a date storage disk formatted for positioning
04/04/1990EP0361920A2 Pickup control circuit for optical disc reproducing apparatus
04/04/1990EP0361879A2 System for recording/reproducing charge latent image
04/04/1990EP0361492A2 Apparatus for recording information on an optical disk
04/04/1990EP0361454A2 Data storage device
04/04/1990EP0361305A2 Injection molding die apparatus for use in the production of substrate of optical disk
04/04/1990EP0361204A2 Optical recording materials, method for preparing the same and optical cards having the same
04/04/1990EP0182909B1 Apparatus for recording data
04/04/1990CN1007465B Optical scanning unit
04/03/1990US4914725 Transducer positioning servo mechanisms employing digital and analog circuits
04/03/1990US4914646 Optical pickup device having particularly shaped photodetectors for providing an accurate focus error
04/03/1990US4914645 Optical disk tracking and seeking systems and specific track formats using servo areas
04/03/1990US4914001 Optical information recording medium
04/03/1990US4913949 Planar, multilayered, laser-optical recording material
04/03/1990US4913948 Optical recording medium
04/03/1990CA1267470A1 Information recording medium
04/03/1990CA1267379A1 Overcoat for optical recording media
03/1990
03/28/1990EP0360466A1 Optical information recording medium and information recording and reproducing method therefor
03/28/1990EP0360457A2 A liquid crystal information storage device
03/28/1990EP0360209A2 Optical head and optical data processing apparatus
03/28/1990EP0360144A2 Optical memory device and information processing apparatus
03/28/1990EP0360123A2 Super-large capacity data storage drive
03/28/1990EP0360122A2 Second harmonic generator and information processing system using the same
03/28/1990CN1007382B Disc-shaped information carrier and method of manufacturing it
03/28/1990CN1007381B Laser magnetic recording grafting technique and recording carrier thereof
03/27/1990US4912717 Apparatus for controlling the amount of laser light and laser light monitoring method
03/27/1990US4912697 Apparatus and method for preventing recording errors due to a reduction in the relative speed between an information carrying light beam and a recording medium
03/27/1990US4912696 Erasable optical data storage medium and method and apparatus for recording data on the medium
03/27/1990US4912695 Method for recording information including error information on a disk
03/27/1990US4912693 Optical head devices for use in disc players
03/27/1990US4912524 Digital signal transmission system having conversion means for reducing the light emission time of a light emitting diode
03/27/1990US4912488 Camera with image input from linear array of electric-to-light transducers
03/27/1990US4912312 Optical card duplicating system
03/27/1990US4912311 Information recording carrier
03/27/1990US4912185 Polyoxyalkylene glycol di(meth)acrylate, crosslinking agent urethane monomer
03/27/1990US4911968 Dual recording disk; transparent substrate; rotational center hole
03/27/1990US4911966 Vinylcyclohexane polymer
03/27/1990US4911776 Method of manufacturing a mold for an optically readable information disc
03/27/1990US4911534 Optical unit for inscribing and/or scanning an information track without mechanical contact, and apparatus provided with the optical unit
03/27/1990US4911512 Waveguide type optical head
03/27/1990CA1267014A1 Single bi-aspherical lens
03/27/1990CA1266975A1 Optically recordable carrier
03/22/1990WO1990002777A1 Cyanine compounds
03/22/1990DE3931500A1 Track positioning system for optical disc unit - has track pull in move made by one unit with following control manipulated by other unit with different bandwidths
03/22/1990DE3925902A1 Automatic cleaning of read write heads in optical disc drive - has cleaning cassette with brushes automatically loaded into position against head
03/22/1990DE3913229A1 Optical disc playback system - has screening plate with needle aperture to control input to detector element
03/21/1990EP0359670A2 Optical pickup apparatus
03/21/1990EP0359541A2 Optical-disk playback apparatus, method of optical-disk playback and combined memory medium
03/21/1990EP0359486A1 Television signal recording and reproducing system using optical recording medium
03/21/1990EP0359368A1 Tracking servo system
03/21/1990EP0359114A2 Magneto-optical recording medium
03/21/1990EP0358774A1 Novel spirooxazine compounds
03/21/1990CN2054931U Laser disc with ring shape set-off
03/21/1990CN1007295B Optical scanning unit
03/20/1990US4910725 Optical recording method for data cards
03/20/1990US4910724 Information recording medium having an area for recording information indicating logical erasure of data and method for recording information
03/20/1990US4910723 Tracking servo device for optical storage disk using optical deflector element for adjusting beam spot on the disk
03/20/1990US4910722 Optical information recording and reproducing apparatus
03/20/1990US4910479 Automatic gain control device for use in an optical memory device
03/20/1990US4910291 Optical article made of amorphous thermoplastic polyester resin
03/20/1990US4910283 Aromatic-aliphatic polycarbonate copolymer
03/20/1990US4910107 Optical recording-reproducing method and device by using the same
03/20/1990US4909871 Process for producing information recording discs
03/20/1990US4909616 Optical system for recording and reproducing an optical information medium
03/20/1990CA1266917A1 Data recording and reproducing apparatus
03/15/1990DE3931261A1 Optical scanner for optical disc system - has lens mounted on carrier with two dimensional adjustment for tracking and focussing
03/15/1990DE3829430A1 Apparatus for optically writing/reading to or from optical or opto-magnetic storage media
03/15/1990DE3828519A1 Data disk with shutter
03/14/1990EP0358294A2 Optical pickup device
03/14/1990EP0358276A1 Method of manufacturing a metal matrix
03/14/1990EP0358243A2 Multidisk player
03/14/1990EP0358080A2 Silicon naphthalocyanine with unsaturated ligands, and optical recording medium
03/14/1990EP0357780A1 Optical head
03/14/1990EP0357614A1 Read-only optical card and system
03/14/1990CN1040452A Discontinuous film optical storage media
03/14/1990CN1007187B Optical disc
03/13/1990US4908835 Information recording medium
03/13/1990US4908816 Voice coil motor with linearized force constant
03/13/1990US4908815 Optical recording system utilizing proportional real-time feedback control of recording beam intensity
03/13/1990US4908814 Method of photothermal information recording reading and erasing
03/13/1990US4908813 Wavelength multiplexing optical recording apparatus
03/13/1990US4908811 Method and apparatus for data recording and reproducing with error reduction
03/13/1990US4908810 Method and apparatus for controlling a spindle servo using pickup position and shift information
03/13/1990US4908506 Apparatus for optically scanning a radiation-reflecting information plane
1 ... 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 ... 1028