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)
11/1989
11/28/1989US4884259 Optical memory disk and track access therefor
11/28/1989US4883741 Information recording medium
11/28/1989CA1263477A1 Apparatus for reading and/or recording a trackwise arranged optical information structure
11/28/1989CA1263476A1 Error control of sector address and optical disc
11/23/1989EP0342968A2 Method for recording and reproducing information, apparatus therefor and recording medium
11/23/1989EP0342967A2 Electrostatic information recording medium and electrostatic information recording and reproducing method
11/23/1989EP0342748A1 Recording system as well as record carrier and recording apparatus for use in the system
11/23/1989EP0342624A2 Magneto-optical data recording system
11/23/1989EP0342359A2 Process and device to repair damaged digital recording disks
11/22/1989CN2048229U 信息记录盘 The information recording disc
11/21/1989US4882723 Device for optically scanning a rotating disc
11/21/1989US4882721 Offset for protection against amorphous pips
11/21/1989US4882428 Azaporphyrin compounds
11/21/1989CA1263183A1 Apparatus for optically scanning an information plane
11/21/1989CA1263018A1 Recording elements comprising write-once thin film alloy layers
11/16/1989WO1989011147A1 Ternary optical elements and methods
11/15/1989EP0341965A2 An optical card and a recording/reproduction apparatus for the same
11/15/1989EP0341936A2 Tilt adjustment mechanism for object lens driving
11/15/1989EP0341868A2 Objective lens for optical disk system and optical head using the same
11/15/1989EP0341829A2 Optical head with flying lens
11/15/1989EP0341820A2 A low mass optical head system
11/15/1989EP0341785A1 Optical disc having an antiresonance ring
11/14/1989US4881217 Method of making optically recorded information medium by exposure to ultraviolet light
11/14/1989US4881216 Optical head in an optical memory device
11/14/1989US4881215 Optical recording medium and method for correcting angular deviation thereof
11/14/1989US4881214 Data record formatting system and reading/writing system for optical recording medium
11/14/1989US4881204 Optical reading or writing apparatus
11/14/1989US4881133 Arrangement for the recording of an information signal
11/14/1989US4880896 Polycarbonate for disc substrate having low bisphenol content
11/14/1989US4880518 Disk carrier
11/14/1989US4880496 Microsurgery, genetic engineering
11/14/1989CA1262963A1 Optical scanning unit
11/09/1989DE3914151A1 Squarylium compounds and their use in optical recording materials
11/09/1989DE3913992A1 Optical disc device
11/08/1989EP0341002A2 Thin film structure having magnetic and colour shifting properties
11/08/1989EP0340988A2 A memory card and an apparatus for processing the same
11/08/1989EP0340968A2 Thin film device and method of manufacturing the same
11/08/1989EP0189187B1 Magnetic-optical disc memory system
11/07/1989US4879710 Optical disc protector and method for applying same
11/07/1989US4879709 Dye-polymer optical data storage media with improved recording sensitivity
11/07/1989US4879708 Optical disk tracking and seeking systems specific track formats using wobbled pits
11/07/1989US4879707 Optical disk tracking and seeking systems specific track formats using discontinuities
11/07/1989US4879706 Method and apparatus for focus and tracking in an optical disk system
11/07/1989US4879705 Automatic loading disc player
11/07/1989US4879704 Optical disk, optical disk recording and reproducing apparatus and copy preventive method for optical disks
11/07/1989US4879691 Optical recording system with optical recording medium having multilevel recording surface for tracking
11/07/1989US4879205 Information storage medium and a method of manufacturing the same
11/07/1989CA1262776A1 Personal information card system
11/07/1989CA1262609A1 Method of manufacturing a recordable optical storage plate
11/02/1989WO1989010614A1 Optical disk and movement control of its optical spot
11/02/1989EP0339940A2 Optical pickup device
11/02/1989EP0339900A2 Optical head devices for use in disc players
11/02/1989EP0339889A2 Optical recording media and process for preparing same
11/02/1989EP0339722A1 Arrangement for optically scanning a magneto-optical carrier
11/02/1989EP0339672A2 Sampled servo type optical recording medium and optical recording apparatus using the same
11/02/1989EP0339368A2 Information-recording element
11/01/1989CN1036851A Compatible light-making dish
10/1989
10/31/1989US4878214 Objective lens supporting device for optical pickup
10/31/1989US4878212 With energy-absorbing material which transmits heat when irradiated, causing collapse of polymer film
10/31/1989US4878211 Method and apparatus for correcting the loop gain of a servo loop in accordance with measurements during open-loop operation
10/31/1989US4877953 Current-voltage converter circuit
10/31/1989US4877756 Method of packaging a semiconductor laser and photosensitive semiconductor device
10/31/1989US4877713 Preformatted optical recording card and method of producing the same
10/31/1989US4877667 Optical disc with inhibited thermal distortion
10/31/1989US4877666 Magneto-optic substrates
10/31/1989US4877475 Method for producing information storage disk
10/31/1989US4877301 Covered optical waveguide having an inlet opening
10/25/1989EP0338913A2 Injection molding process of a plastic substrate for an optical disk
10/25/1989EP0338864A2 Magneto-optical playback heads
10/25/1989EP0338862A2 Optical recording media and process for preparing same
10/25/1989EP0338858A2 Optical disk apparatus with shortened access time and rotated method
10/25/1989EP0338840A2 Optical pick-up device
10/25/1989EP0338839A2 Optical recording medium recording and reproducing device
10/25/1989EP0338776A2 Bump-forming media including thin intermediate reflective layer and methods for writing, reading, and erasing same
10/25/1989EP0338426A2 Azulene methine dyes and recording material containing these dyes
10/25/1989EP0338368A1 Thin film photoluminescent articles and method of making the same
10/25/1989EP0190349B1 Apparatus for recording data
10/25/1989CN1036653A Optical media reflective materials
10/25/1989CN1036652A Optical data storage media with spatially variable energy absorptivity
10/24/1989US4876680 Monolithic optical pick-up using an optical waveguide
10/24/1989US4876679 Digitally controlled positioning system for quickly moving and then finely positioning an object
10/24/1989US4876667 Antimony, selenium, tellurium solid solution
10/24/1989US4876666 Wavelength selective optical data storage system
10/24/1989US4876557 Recording medium of air-sandwich structure
10/24/1989US4876356 Naphtholactam dyes and optical recording medium containing these days
10/24/1989US4876347 Methine dyes having a pyridyl group and a pyridyl or a quinolinyl group
10/24/1989US4876133 Optical data recording system and method of production of recording medium
10/19/1989WO1989009990A1 Fabrication method of mask for rom type optical recording card and inspection method of mask
10/19/1989WO1989009989A1 Optical recording medium and method of manufacturing same
10/18/1989EP0337806A2 Method of overwriting information on recording material
10/18/1989EP0337553A1 Laminated product, compound used in the laminated product and optical information carrier provided with the laminated product
10/18/1989EP0337445A2 Laminar structure comprising organic material and inorganic material, methods for producing it and its use
10/18/1989EP0337209A2 Alkylphthalocyanine near-infrared absorbers and recording/display materials using the same
10/18/1989EP0337059A2 Holding device of a mirror element for a rearview mirror
10/18/1989CN1036474A Senser feed movement divece of reproducing apparaturs for disk recording carriers
10/17/1989US4875204 Method of erasing information
10/17/1989US4875203 Tracking servo signal generating device for an optical disc
10/17/1989US4875202 Disk-type storage medium recording/reproducing apparatus
10/12/1989DE3810438A1 Cylinder store for magnetic-optical or optical data storage and reproduction
10/11/1989EP0336761A2 Position detecting device with means for switching a plurality of alternating signals having different phases
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