| 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) |
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| 09/19/1978 | US4115808 Optical signal play-back device with auto-focussing of a light beam at a record carrier surface |
| 09/19/1978 | CA1038961A2 Video reproducing method and apparatus |
| 09/19/1978 | CA1038960A2 Video recording system |
| 09/19/1978 | CA1038957A1 Coder and decoder for a system designed to disseminate colour television audio video signals |
| 09/12/1978 | US4114180 Closed loop laser noise elimination for optoelectronic recording |
| 09/05/1978 | US4111519 Recording and reading synthetic holograms |
| 09/05/1978 | CA1038078A1 Record carrier on which information is stored in an optically readable structure |
| 08/29/1978 | US4110607 System for detecting height fluctuations of a surface on a recording medium in an optical recording or reproducing apparatus |
| 08/22/1978 | US4109045 Multilayer |
| 08/22/1978 | CA1036859A1 Method of making an embossed pattern on an information bearing substrate |
| 08/15/1978 | US4107701 Acousto-optic snapshot recorder |
| 08/08/1978 | US4106058 Data disc optical reader containing a device for automatic data access |
| 08/08/1978 | US4106057 Dust proof optical system for optically reading and writing on a rotating record with the aid of a radiation beam |
| 08/01/1978 | US4104573 Speed control device for a moving member |
| 08/01/1978 | US4104489 Holographic memory with fringe stabilizing compensation for recording medium motion |
| 07/25/1978 | US4103044 Method for storage of retrievable information dispersion imaging material and method |
| 07/18/1978 | US4101976 Frequency selective optical data storage system |
| 07/18/1978 | US4101907 Overcoat structure for optical video disc |
| 07/18/1978 | US4101193 Scanning system |
| 07/11/1978 | US4100577 Apparatus for optically reading signal information recorded on a reflective record medium surface |
| 07/11/1978 | US4100576 Electromagnetic optical beam controller having an eddy current damper for arresting mechanical resonance |
| 06/27/1978 | US4097895 Multilayer optical record |
| 06/27/1978 | US4097730 Focus correction system for video disc player |
| 06/20/1978 | US4096486 Recorder |
| 06/13/1978 | US4094576 Straight-line optical scanner using rotating holograms |
| 06/06/1978 | US4094013 Optical storage disk system with disk track guide sectors |
| 06/06/1978 | US4094011 System for recording and reproducing hologram |
| 06/06/1978 | US4094010 Optical multi-channel digital disc storage system |
| 06/06/1978 | US4093961 Optical reading apparatus with scanner light intensity control |
| 06/06/1978 | US4093684 Solid solderable polyurethane data signal recording medium |
| 05/30/1978 | US4092671 Video player having plural safety devices actuated by unlatching |
| 05/30/1978 | US4092529 Detecting head for use in an apparatus for reading optically an information recorded on a record carrier as a track or tracks |
| 05/23/1978 | US4091171 Optical information storage material and method of making it |
| 05/16/1978 | US4090218 Method of, and apparatus for, manufacturing a video record |
| 05/16/1978 | US4090206 Method and apparatus for producing successive lines of image points on a recording medium |
| 05/16/1978 | US4090031 Multi-layered opitcal data records and playback apparatus |
| 05/02/1978 | US4087842 Recording track eccentricity compensation method and means |
| 05/02/1978 | US4087651 Optical sound recording system with inversely polarized sound signals |
| 04/18/1978 | US4085423 Information reproducing apparatus with plural beam readout |
| 04/18/1978 | US4085296 Modulated sound reading system |
| 04/11/1978 | US4084185 Record carrier on which information is stored in an optically readable structure |
| 03/14/1978 | US4079248 Optical focussing sensor |
| 03/14/1978 | US4079247 Optical focussing device |
| 02/28/1978 | US4076372 Two-dimensional light deflector apparatus |
| 02/21/1978 | US4075665 Method and apparatus for increasing the recording capacity of a disk |
| 02/14/1978 | US4074314 Apparatus for optically reading a record carrier and correcting focus error |
| 02/14/1978 | US4074313 Electron beam disc recorder |
| 02/14/1978 | US4074312 Automatic dithering optical focusing system using an oscillating mirror in the path of the radiation beam |
| 02/14/1978 | US4074282 Radiation-sensitive record with protected sensitive surface |
| 02/14/1978 | US4074085 Multiple beam optical record playback apparatus for simultaneous scan of plural data tracks |
| 02/14/1978 | US4073567 Pivoting mirror device |
| 01/31/1978 | US4071854 Device for the stabilization of flexible discs and more particularly of videodiscs and reading apparatus adapted to this device |
| 01/31/1978 | US4071490 Polyvinyl chloride |
| 01/17/1978 | US4069487 Recording member and process for recording |
| 01/10/1978 | US4068259 Coder and decoder for a system designed to disseminate color television audio video signals |
| 01/10/1978 | US4068222 Circuit arrangement for automatic level control for optical sensors with pulsed radiation, for example for surveillance equipment |
| 01/10/1978 | US4068121 Light collector and prism light source for photoelectric readers |
| 01/03/1978 | US4067044 Information recording and retrieval apparatus |
| 12/27/1977 | US4065786 Videodisc playback system |
| 12/20/1977 | US4064538 Method and device for displaying a picture film via a video-disc |
| 12/13/1977 | US4063287 Tracking mirror device for a video disc player |
| 12/06/1977 | US4061889 Film with light sound track carrying the stereophonic sound information; ribbon light valve for providing the light sound track as well as light sound adapter for reproducing the information recorded on |
| 11/29/1977 | US4060838 Centering pin for cassette apparatus |
| 11/29/1977 | US4060248 Playing apparatus, in particular a video player for playing a record which is made of a transparent material and provided with a central hole |
| 11/22/1977 | US4059841 Optical read-out system including asymetrical beam intensity and four detector cells |
| 11/22/1977 | US4059338 Integrated optical waveguide coupler |
| 11/15/1977 | US4058834 System for making a light beam scan a flat carrier with autofocusing |
| 11/08/1977 | US4057833 Centering detection system for an apparatus for playing optically readable record carriers |
| 11/08/1977 | US4057832 Apparatus for reading a disk-shaped record carrier with track jumping for charging motion effects |
| 11/08/1977 | US4057831 Video record disc manufactured by a process involving chemical or sputter etching |
| 11/08/1977 | US4057331 Electro-magnetically controllable beam deflection device |
| 10/18/1977 | US4054357 Providing a representation of information stored in a hologram |
| 10/04/1977 | US4052706 System for reading an optical recording of binary numerical data |
| 09/27/1977 | US4051529 Focus control system with movable mirror |
| 09/27/1977 | US4051528 Apparatus for optically reconstructing information |
| 09/27/1977 | US4051527 Focus detection system for a video disc player using a plurality of radiation sensors in the far field of the information structure |
| 09/27/1977 | US4051329 An optical information recording system in which the energy when transmitted to the recording layer is constant |
| 09/27/1977 | US4050811 Optical data record copier having array of lenses with field gaps aligned with data gaps |
| 08/30/1977 | US4045115 Optics for multi-track holographic tape recorder |
| 08/23/1977 | US4044378 Optical system for reflective mode video playback apparatus |
| 08/23/1977 | US4044207 Apparatus for reproducing a multiple track photographic sound record |
| 08/16/1977 | US4042526 Non-crystalline substance having an optical memory effect |
| 08/09/1977 | US4041530 Video disc with phase structure |
| 08/09/1977 | US4041477 Ferroelectric-photoconductor optical storage |
| 08/02/1977 | US4039764 Method for protecting a flexible record disc and disc so protected |
| 08/02/1977 | US4039256 Intermittent film transport registration stabilization device |
| 07/26/1977 | US4038679 Apparatus for reading an optically recorded record carrier provided with periodic surface undulations and for deriving a focussing control signal from such surface undulations |
| 07/26/1977 | US4038663 Method of writing information with a modulated radiation beam onto an information storage medium and information storage medium particularly adapted to the method |
| 07/26/1977 | US4038524 Data carrier optically readable by transmission and method of manufacturing such a data carrier |
| 07/26/1977 | US4037929 Optical projection device and an optical reader incorporating this device |
| 07/19/1977 | US4037252 Apparatus for reading a disc-shaped record carrier with plural scanning spots for stable radial tracking |
| 07/19/1977 | US4037251 Data carrier optically read out by transmission, and method of manufacturing said data carrier |
| 07/19/1977 | US4037075 Image reproduction systems |
| 07/12/1977 | US4035579 Pulse-code modulated video reproducer utilizing linear arrayed lenses |
| 07/05/1977 | US4034403 Apparatus for positional control of a reading head in a device for reproducing optically coded video disk recordings |
| 06/28/1977 | US4032971 Video player having safety devices actuated by unlatching |
| 06/28/1977 | US4032927 High density optical recording apparatus |
| 06/28/1977 | US4032776 Automatic optical focussing system |
| 06/28/1977 | US4032691 Insulating, porous resin layer and a thermally deformed metal, dye, or resin |
| 06/21/1977 | US4030835 Defect detection system |