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)
10/1983
10/25/1983US4412264 Magneto-optic recording medium
10/25/1983US4412231 Light recording medium
10/25/1983US4411983 Method for processing an image-forming material
10/25/1983US4411500 Optical system for reproducing information
10/25/1983CA1155955A1 Self-synchronizing clock source for optical memories
10/25/1983CA1155690A1 Process and recording media for continuous wave four- level, two-photon holography
10/18/1983US4410978 Cured di- or triacrylate layer
10/18/1983US4410969 Optical information playback apparatus
10/18/1983US4410968 Method and apparatus for recording on a disk supported deformable metallic film
10/18/1983US4410277 Apparatus for detecting magneto-optical anisotropy
10/18/1983US4410241 Device for processing optical information and method of manufacturing a coma correction plate used in such a device
10/18/1983CA1155548A1 Optical recording medium and method for its formation
10/18/1983CA1155547A1 Optical recording device having several ablative recording layers
10/18/1983CA1155546A1 Dielectric recording medium
10/18/1983CA1155545A1 Apparatus for controlling the motion of a moving tape
10/11/1983US4409470 Narrow-bodied, single-and twin-windowed portable laser scanning head for reading bar code symbols
10/11/1983US4409169 Method for manufacturing disk-shaped information carriers
10/11/1983CA1155220A1 Optical information record member
10/11/1983CA1155219A1 Apparatus and method for controlling focus in a recording system
10/11/1983CA1155218A1 Semiconductor laser source optical reading head and device for reading by reflection an information carrier incorporating such a head
10/11/1983CA1154963A1 USE OF.alpha.,.alpha.'-BIS(DIALKYLAMINOBENZYLIDENE) KETONE DYES IN OPTICAL RECORDING ELEMENTS
10/05/1983EP0090695A1 Optical disc protected from humidity
10/05/1983EP0090690A1 Method and device for regenerating the phases of synchronizing signals in an optical recording-reproducing apparatus for record carriers
10/05/1983EP0090683A1 Optical head in a write-read device for an information carrier
10/05/1983EP0090604A1 Data recorder system
10/05/1983EP0090461A2 Magazine and disc holders for supporting discs in the magazine
10/05/1983EP0090420A1 Device for optically recording and reading of information
10/05/1983EP0090379A2 Data track searching device
10/05/1983EP0090145A2 Process and device for storing optical information
10/04/1983US4408319 Optical information recording mother disc and method of producing the same
10/04/1983US4408314 Record/playback track tracking servo
10/04/1983US4408313 Objective lens driving device for tracking and focus corrections
10/04/1983US4408311 Optical tracking apparatus
10/04/1983US4408301 Picture information filing system
10/04/1983US4408213 Multilayer-spacer layer decomposes at lower temperature than substrate or reforcement layer
10/04/1983US4407880 Substrate of member for recording information with light and method of manufacturing the same
10/04/1983US4407646 Apparatus for making video discs
10/04/1983CA1154865A1 Video track transfer system and method
09/1983
09/28/1983EP0089874A1 Covered optical disc with a flexible sealing component
09/28/1983EP0089775A1 Method for manufacturing optical type recording medium
09/28/1983EP0089736A2 Information track centering system
09/28/1983EP0089734A2 Disk-shaped record carrier
09/28/1983EP0089549A1 Optical disk apparatus
09/27/1983US4406520 Beam splitter optical system of signal pickup device
09/27/1983CA1154535A1 Video disc system
09/27/1983CA1154534A1 Replicable optical recording medium
09/27/1983CA1154533A1 Replicable optical recording medium
09/27/1983CA1154523A1 Control loop
09/21/1983EP0089274A1 Optical information carrier, optical device for generating tracking signals and optical device for generating error signals for focussing
09/21/1983EP0089264A1 Method and device for generating synchronizing signals in an optical recording-reproducing apparatus for record carriers
09/21/1983EP0089263A1 Pre-engraved movable record carrier and tracking device therefor
09/21/1983EP0089244A2 Light beam position control apparatus
09/21/1983EP0089168A1 Optical type information recording medium
09/21/1983EP0089119A1 Optical memory system having an improved short seek capability
09/21/1983EP0089045A2 Data recording and reproducing apparatus
09/21/1983EP0089021A2 Overlay recording prevention device for optical disc apparatus
09/21/1983EP0089020A2 Data processing apparatus with means for recording data by moving a head to a plurality of tracks
09/20/1983US4406000 Tracking system for optical record medium
09/20/1983US4405994 Metal layer with organic cover on substrate; impact of beam causes expansion
09/20/1983US4405993 Liquid crystal disc memory system
09/20/1983US4405862 Radiation beam etching
09/20/1983US4405706 Optical information recording medium
09/20/1983US4405671 Optical information recording disk
09/20/1983US4405541 Video disc processing
09/20/1983CA1154163A1 Tracking servo apparatus for an optical information reproducing system
09/20/1983CA1154162A1 Optical memory having a parallel read out
09/14/1983EP0088671A1 Optical head in a write-read device for an information carrier
09/14/1983EP0088662A1 Optical unit associated with an optical head for reading/writing an optical disc
09/14/1983EP0088538A1 Optical memory system having an improved track following
09/14/1983EP0088537A1 Optical memory system having an improved long seek capability
09/14/1983EP0088536A1 Optical memory system having improved track following and seeking capabilities
09/14/1983EP0088441A1 Vertical focus servo system for an optical disc player
09/14/1983EP0088436A2 Apparatus for verifying code signals in the vertical blanking interval
09/13/1983US4404656 Thermo-optical data writing process and data medium for performing this process
09/13/1983US4404599 Laser recording information and pilot signals for tracking on a grooveless recording
09/07/1983EP0088010A1 Device with an optical writing/reading head for an optical disc
09/07/1983EP0087973A1 Tracking servo system for optical-disc information reproducing apparatus
09/07/1983EP0087795A2 Mapping disc defect detector
09/07/1983EP0087718A1 Tracking servo control unit for an information reproducing apparatus
09/07/1983EP0087460A1 Optical information storage
09/06/1983US4403318 Apparatus and method for recording, reproducing and erasing on optical recording discs
09/06/1983US4403316 Swing-arm device for an optical scanning unit
09/06/1983US4403259 Apparatus for reading information from an information recording disc
09/06/1983US4403231 Disk shaped substrate, radiation sensitive layer, oxide layer, and protective coating
09/06/1983CA1153468A1 Mastering machine
09/01/1983WO1983003027A1 Optical memory having a short seek capability
09/01/1983WO1983003026A1 Optical memory system having a long seek capability
09/01/1983WO1983003025A1 Optical memory system having track following
09/01/1983WO1983003024A1 Optically memory system having track following and seeking capabilities
08/1983
08/31/1983EP0087174A1 Control system for an optical data recording apparatus
08/31/1983EP0087154A2 Method and apparatus for the universal recording and playback of encoded digital video data
08/30/1983US4402061 Preformatted optical media for use in an optical memory system
08/30/1983CA1152970A1 Preparation of colloidal iron dispersions by the polymer-catalyzed decomposition of iron carbonyl and iron organocarbonyl compounds
08/30/1983CA1152941A1 Process for making discs
08/30/1983CA1152787A1 Method for manufacturing in-line hologram lens
08/23/1983US4400707 Recording medium
08/23/1983CA1152645A1 Optical reproducing head
08/23/1983CA1152644A1 Record carrier containing information in an optically readable radiation reflecting information structure
08/23/1983CA1152643A1 Record carrier containing information in an optically readable information structure
08/23/1983CA1152642A1 Apparatus for reading a disc-shaped record carrier