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)
11/1980
11/25/1980US4236173 Apparatus for reading a disc-shaped record carrier having a PAL color television signal
11/25/1980US4236105 Digital center tracking system
11/25/1980US4236050 System for recovering information from a movable information storage medium having a pilot signal with an aligned phase angle in adjacent tracks
11/25/1980US4235531 Color movie film noise reduction system
11/25/1980US4235507 Optical system to condense light from a semiconductor laser into a circular spot
11/18/1980US4234837 Digital center tracking system
11/18/1980US4234394 Method for producing an information carrier disc
11/11/1980US4233626 Playback information record using phase cancellation for reading
11/11/1980US4233502 Opto-electronic focussing error detection arrangement
11/11/1980CA1089267A1 Two-axis mirror control apparatus
11/04/1980US4232337 Method and apparatus for tracking an optically readable information track
11/04/1980US4232201 Dithered center tracking system
11/04/1980CA1089093A1 Apparatus for the processing of optical type information
10/1980
10/29/1980EP0018211A1 Tracking arrangement for a sensor of signals on an information track
10/28/1980US4230939 Laser light absorbing dye
10/28/1980US4230915 Record carrier with an optically readable radiation-reflecting information structure
10/21/1980US4229808 Method for recording multiple data segments on a storage disc with eccentricity factor
10/21/1980US4229763 Optical high density FM recording device with corrective signal
10/15/1980EP0017433A1 Apparatus for tracking an information track on a recording medium
10/15/1980EP0017360A2 Method and apparatus for pretreating a substrate, method and apparatus for pretreating a substrate and depositing a thin metallic film thereon
10/15/1980EP0017289A1 Optical recording device having several ablative recording layers
10/14/1980US4228326 System for recording information on a rotatable storage disc, in a substantially uniform recording density
09/1980
09/30/1980US4225873 Recording and playback system
09/30/1980CA1086860A1 Video player having safety devices actuated by unlatching
09/30/1980CA1086859A1 Pivoting mirror device
09/30/1980CA1086858A1 Apparatus for reading a disk-shaped record carrier
09/23/1980US4224642 PCM Recording and reproducing method providing for dropout compensation
09/23/1980US4224481 Compression and expansion circuitry for a recording and playback system
09/23/1980US4224480 Holographic playback system using a charge storage sensor and binary decoding
09/23/1980CA1086424A1 Video disc playback system and pickup cartridge therefor
09/17/1980EP0015834A1 Method and apparatus for the manufacture of video records
09/16/1980US4223384 Radiography
09/16/1980US4223348 Automatic focussing device
09/16/1980US4223347 Videodisc with undulating nested tracks
09/16/1980US4223188 Scanning system for reproduction of optical sound tracks with clear area noise discriminator delay means
09/16/1980US4223187 Method and apparatus for recording and reproducing a video-disc with an oscillated track
09/16/1980US4222630 Digitally controlled fiber optic recording device
09/16/1980CA1085968A1 Resist development control system
09/09/1980US4222072 Video player/recorder with non-linear mark length modulation
09/09/1980US4222071 Sensitivity information record
09/09/1980US4222070 Recording video information on a flexible master disc
09/03/1980EP0015141A1 Dielectric recording medium and a method of making a record
09/02/1980CA1085050A1 Method for recording information on a rotatable medium
09/02/1980CA1084741A1 Automatic optical focussing system
08/1980
08/26/1980US4219848 Optical record playback apparatus employing light frequency at which alternate regions of record track exhibit anti-reflection condition
08/26/1980US4219826 Light-absorbing layer is platinum bis(dithio-alpha-diketone) complex
08/26/1980US4219704 Record playback apparatus for optical data records
08/26/1980US4219703 Sound reproduction device for talking books
08/26/1980US4219615 Color photography, silver halide emulsions, color couplers
08/20/1980EP0014549A1 Objective lens for reading videodiscs
08/20/1980EP0014227A1 System and method of reproducing and erasing information
08/19/1980US4218689 Ablatable medium for optical recording
08/19/1980CA1084162A1 Record playback system
08/06/1980EP0014046A1 A method for playback of a thermal recording element
08/05/1980US4216501 Optical anti-reflective information record
08/05/1980US4216357 Optical play-back system for recorded signals with oscillating beam
08/05/1980US4216284 Color photographic light-sensitive material
07/1980
07/29/1980CA1082807A1 Information storage medium with protective foil and method or writing thereon
07/23/1980EP0013453A1 Optical recording element and method of optically recording information
07/22/1980US4214249 Recording member for laser beam and process for recording
07/22/1980US4214157 Apparatus and method for correcting imperfection in a polygon used for laser scanning
07/22/1980CA1082357A1 Apparatus with attenuating element for reading a record carrier
07/22/1980CA1082356A1 Record carrier with an optically readable trackwise- arranged information structure and apparatus for the read-out thereof
07/22/1980CA1082342A1 Automatic optical focusing device and optical reader comprising this device
07/15/1980US4213193 Holographic data storage systems
07/15/1980US4213158 Optical data recording system utilizing acoustic pulse imaging to minimize image blur
07/15/1980CA1081511A1 Automatic optical focussing system
07/09/1980EP0013070A1 Video record systems
07/01/1980CA1080523A1 Optical identification system and reader for reading optical gratings on a record medium
06/1980
06/26/1980WO1980001328A1 Method of recording data on an optical disc
06/25/1980EP0012650A1 Device for acceding to a track on an optically recordable or readable carrier and optical system comprising such a device
06/25/1980EP0012603A1 Method and apparatus for tracking an optically readable information track
06/24/1980US4209804 Record carrier containing information in an optically readable radiation reflecting information structure
06/24/1980US4209793 Apparatus for optically recording signals on a recording medium
06/24/1980US4209291 Safety apparatus for stopping gas leakages
06/11/1980EP0011990A1 System and apparatus for centering a light beam on an information track
06/03/1980US4206477 Optical recording with track drop compensation
05/1980
05/28/1980EP0011495A1 Method and apparatus for rotating an information storage disc
05/27/1980US4205338 Disc recording tracking system
05/27/1980CA1078515A1 Scan angle compensator for electro-optical label reading system
05/27/1980CA1078511A1 Process for controlling the starting and stopping of the reading of a recording support
05/27/1980CA1078505A1 Comb filter apparatus for vedeo playback systems
05/27/1980CA1078155A1 Method of manufacturing an electrically controllable pivoting mirror device
05/20/1980US4204234 System for positioning single gap magnetic head to follow moving recorded data track
05/20/1980CA1078061A1 Multiple code sensing optical reader
05/20/1980CA1078060A1 Multi-layered optical data records and playback apparatus
05/15/1980WO1980001016A1 Magneto-optical anisotropy detecting device
05/14/1980EP0010664A1 Method and apparatus for positioning a transducing head
05/13/1980US4203134 FM Signal demodulator with defect detection
05/13/1980US4203133 Optical player with half wave plate
05/13/1980CA1077620A1 Storage disk and read/write system
05/06/1980US4201994 Information formation apparatus
05/06/1980US4201455 Laser-operated apparatus for data and signal recording
04/1980
04/30/1980EP0010223A1 Process for decomposing a gas mixture
04/22/1980US4199820 Random access storage apparatus with a movable recording medium
04/22/1980US4199783 Optical system for recording and reading an information on a tape
04/22/1980CA1076249A1 Elimination of flicker phenomena of video records
04/16/1980EP0010017A1 Protected optical disk
04/15/1980US4198701 Digital optical recorder-reproducer system
04/15/1980US4198657 Optical disk reader with means for correcting errors due to eccentricity and time axis variations
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