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)
12/1990
12/18/1990US4978844 Optical element carrying printed substrate and optical head device using the substrate
12/18/1990US4978578 Optical disk of polycarbonate
12/18/1990US4978187 Optical element, optical disc and rotary encoder with the optical element
12/18/1990CA1278094C Method and apparatus for correcting angular deviation of optical recording medium
12/18/1990CA1278093C Method and apparatus for detecting focussing position
12/18/1990CA1278092C Optical recording medium and tracking method therefor
12/16/1990CA2018042A1 Infrared absorbing squarylium dyes for dye-donor element used in laser-induced thermal dye transfer
12/13/1990WO1990015408A1 Optical recording and/or reproducing apparatus
12/12/1990EP0402334A2 Ultraviolet light curable composition and an optical disk base plate incorporating the composition
12/12/1990EP0402180A2 Information recording device
12/12/1990EP0402123A2 Optical head device
12/12/1990EP0402081A2 Optical data recording and reproducing apparatus
12/12/1990EP0402071A2 Signal processing circuit for magnetooptical record/reproducing apparatus
12/12/1990EP0401973A2 Reliable track crossing detection in data storage apparatus
12/12/1990EP0401791A2 Information storage method
12/12/1990EP0401764A2 Semiconductor laser optical head assembly
12/12/1990EP0401319A1 Production d'hologrammes
12/12/1990EP0401236A1 Optical media reflective materials
12/12/1990CN1047759A Photosensitive semiconductor device
12/12/1990CN1047750A Method and apparatus for recording signals on a record carrier, measurement method and measurement device for use in the recording method and the recording apparatus, and record carrier
12/11/1990US4977554 Slider-position detector for detecting the position of the slider of a disk player
12/11/1990US4977553 Method and apparatus for identifying the type of servo system to be used with a given disc
12/11/1990US4977552 Split type optical pick-up device with a tracking error detector on the moving part
12/11/1990US4977551 Optical disk tracking control system and method having normalized tracking error control signal
12/11/1990US4977539 High-speed searching apparatus for CDP
12/11/1990US4977461 Dropout detecting circuit with one-half wavelength delay
12/11/1990US4977249 For optical filters or shields
12/11/1990US4977068 Optical recording media
12/11/1990US4977064 Optical recording medium and process for fabricating the same
12/11/1990US4977019 Magnetooptical recording medium bonded with a flexible foam adhesive
12/11/1990CA1277767C Optical recording apparatus
12/11/1990CA1277766C Optical writing and reading method and optical writing and readingapparatus
12/06/1990CA2018313A1 Semiconductor laser optical head assembly
12/05/1990EP0400949A2 Disc loading apparatus
12/05/1990EP0400927A2 Recording and reproducing apparatus using opto-magneto media
12/05/1990EP0400899A2 Apparatus for reading recorded information
12/05/1990EP0400810A2 Optical disk reproducing apparatus
12/05/1990EP0400781A1 Method of preparing information reading apparatus and objective lens suspension body
12/05/1990EP0400754A1 Photosensitive semiconductor device
12/05/1990EP0400753A1 Semiconductor device comprising a radiation-sensitive element
12/05/1990EP0400726A1 Method and apparatus for recording signals on a record carrier, measurement method and measurement device for use in the recording method and the recording apparatus, and record carrier
12/05/1990EP0400675A2 Actuator driving circuits
12/05/1990EP0400570A2 Optical information processing system
12/05/1990EP0400502A2 Beam converting apparatus
12/05/1990CN1047585A 信息记录介质 The information recording medium
12/05/1990CN1047584A Focus-error detection using prism-enhanced spot size monitoring
12/04/1990US4975898 Method and apparatus for preventing copying of an optical disk
12/04/1990US4975897 Reading circuit for an optical information storing apparatus
12/04/1990US4975895 Track servo control system for optical disk apparatus
12/04/1990US4975358 Immediate write, read, and erase optical storage medium and method of marking and erasing
12/04/1990US4975355 Information storage medium
12/04/1990US4975310 Substrate for information recording medium and production method thereof
12/04/1990US4974941 Process of aligning and realigning liquid crystal media
12/04/1990CA1277420C Disc reproducing apparatus
12/04/1990CA1277406C Semiconductor laser apparatus for optical head
12/04/1990CA1277282C Method for overcoating optical recording media
11/1990
11/29/1990WO1990014666A1 Optical disc recording device and optical disc
11/29/1990WO1990014665A1 Tracking error detection unit of multi-beam optical disk apparatus
11/29/1990WO1990014664A1 Interactive optical disk, and systems and methods for using
11/29/1990WO1990014657A1 Recording media
11/29/1990WO1990014614A1 High fidelity film sound reproduction device
11/29/1990DE4016916A1 Scanning and driving gear for optical devices - uses optical processor and electrically energises windings integrating with permanent magnets
11/28/1990EP0399977A2 Apparatus and method for detecting focus errors
11/28/1990EP0399853A2 Recording and reproducing device
11/28/1990EP0399852A2 Recording/reproducing device
11/28/1990EP0399650A2 Wedge prism assembly for optical information storage
11/28/1990EP0399532A2 Information recording media
11/28/1990EP0399513A1 Pit pattern detecting method
11/28/1990EP0399279A1 New monomers and their use for the preparation of a laser optical recording element which can be repeatedly deleted and re-entered
11/28/1990EP0399225A1 Track jumping method
11/28/1990EP0398933A1 Recording method and apparatus
11/28/1990CN1010624B Readout system of data-storage
11/27/1990US4974222 Slider-position detector for detecting the position of the slider of a disk player
11/27/1990US4974221 Method and apparatus for reproducing information by varying a sensitivity of a phase-locked loop in accordance with a detection state of a reproduced signal
11/27/1990US4974220 Apparatus for positioning an optical head on a destination track which discriminates track lands and grooves
11/27/1990US4973836 Optical pickup device including a beam splitter having an inclined plane
11/27/1990US4973832 Optical head chromatically optimized for self-focusing
11/27/1990US4973831 Fixing structure of a one sidedly fixed beam splitter in an optical pickup
11/27/1990US4973520 Optical recording medium
11/27/1990CA1277030C Linear motor
11/27/1990CA1277029C Optical disc player
11/27/1990CA1277028C Optical disc and disc drive apparatus for writing/reading data into/from the disc
11/26/1990WO1990014663A1 Interactive optical disk, method of fabrication and apparatus for recording thereon
11/26/1990CA2055454A1 Interactive optical disk, method of fabrication and apparatus for recording thereon
11/23/1990CA2017226A1 Information recording media
11/22/1990EP0398799A2 Optical-disk manufacturing device
11/22/1990EP0398714A2 Read-only optical disk
11/22/1990EP0398656A2 Electric charge image recording medium and recording/reproducing apparatus
11/22/1990EP0398622A2 Optical head in an optical disk apparatus
11/22/1990EP0398395A1 Driving apparatus suitable for optical disc player or recorder and player or recorder including such apparatus
11/22/1990EP0398255A2 Optical recording medium and recording method therefor
11/22/1990EP0397762A1 Optical data storage media with spatially variable energy absorptivity
11/22/1990EP0148278B1 Light pickup
11/21/1990CN1047159A Information recording system, and recording device and record carrier for use in such an information recording system
11/21/1990CN1047158A Information recording media
11/21/1990CN1047097A Substrate for optical recording media and molding composition therefore
11/21/1990CN1010520B Imformation storage device
11/21/1990CN1010519B Invertible optical recording information dielectrical
11/21/1990CN1010518B Erasable optical disc and optical information recording and reproducing device
11/20/1990US4972422 Second harmonic generator and information processing system using the same
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