FR2218612A1 - - Google Patents

Info

Publication number: FR2218612A1
Authority: FR; France
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.): Granted

Application number

FR7401660A

Other languages

French (fr)

Other versions

FR2218612B1 (en

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Discovision Associates

Original Assignee

MCA Discovision Inc

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

1973-02-20

Filing date

1974-01-17

Publication date

1974-09-13

1974-01-17 Application filed by MCA Discovision Inc filed Critical MCA Discovision Inc

1974-09-13 Publication of FR2218612A1 publication Critical patent/FR2218612A1/fr

1980-03-07 Application granted granted Critical

1980-03-07 Publication of FR2218612B1 publication Critical patent/FR2218612B1/fr

Status Expired legal-status Critical Current

Links

Classifications

- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
- G11B7/128—Modulators
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/03—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on ceramics or electro-optical crystals, e.g. exhibiting Pockels effect or Kerr effect
- G02F1/0327—Operation of the cell; Circuit arrangements
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/16—Error detection or correction of the data by redundancy in hardware
- G06F11/1608—Error detection by comparing the output signals of redundant hardware
- G06F11/1612—Error detection by comparing the output signals of redundant hardware where the redundant component is persistent storage
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/02—Analogue recording or reproducing
- G11B20/06—Angle-modulation recording or reproducing
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/22—Signal processing not specific to the method of recording or reproducing; Circuits therefor for reducing distortions
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
- G11B7/0045—Recording
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
- G11B7/005—Reproducing
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/085—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection
- G11B7/08547—Arrangements for positioning the light beam only without moving the head, e.g. using static electro-optical elements
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C13/00—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00
- G11C13/04—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00 using optical elements ; using other beam accessed elements, e.g. electron or ion beam
- G11C13/048—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00 using optical elements ; using other beam accessed elements, e.g. electron or ion beam using other optical storage elements

Landscapes

Physics & Mathematics (AREA)
Engineering & Computer Science (AREA)
Optics & Photonics (AREA)
Signal Processing (AREA)
Nonlinear Science (AREA)
General Physics & Mathematics (AREA)
Theoretical Computer Science (AREA)
Chemical & Material Sciences (AREA)
General Engineering & Computer Science (AREA)
Ceramic Engineering (AREA)
Crystallography & Structural Chemistry (AREA)
Quality & Reliability (AREA)
Optical Recording Or Reproduction (AREA)
Optical Head (AREA)
Television Signal Processing For Recording (AREA)
Moving Of The Head For Recording And Reproducing By Optical Means (AREA)

FR7401660A 1973-02-20 1974-01-17 Expired FR2218612B1 (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US33356073A	1973-02-20	1973-02-20

Publications (2)

Publication Number	Publication Date
FR2218612A1 true FR2218612A1 (en)	1974-09-13
FR2218612B1 FR2218612B1 (en)	1980-03-07

Family

ID=23303311

Family Applications (6)

Application Number	Title	Priority Date	Filing Date
FR7401660A Expired FR2218612B1 (en)	1973-02-20	1974-01-17
FR7824957A Granted FR2399087A1 (en)	1973-02-20	1978-08-29	APPARATUS AND METHOD FOR STORING AND RETURNING INFORMATION IN THE FORM OF A FREQUENCY MODULE SIGNAL ON AN INFORMATION STORAGE ELEMENT
FR7824958A Granted FR2399088A1 (en)	1973-02-20	1978-08-29	APPARATUS AND METHOD FOR RESTITUTING A MODULE FREQUENCY SIGNAL STORED ON AN INFORMATION STORAGE ELEMENT
FR7824959A Granted FR2399089A1 (en)	1973-02-20	1978-08-29	APPARATUS AND METHOD FOR MONITORING THE STORAGE OF VIDEO INFORMATION ON AN INFORMATION STORAGE ELEMENT
FR7824956A Granted FR2399086A1 (en)	1973-02-20	1978-08-29	APPARATUS AND METHOD FOR STORING INFORMATION IN THE FORM OF A FREQUENCY MODULE SIGNAL ON AN INFORMATION STORAGE ELEMENT
FR7824960A Granted FR2399090A1 (en)	1973-02-20	1978-08-29	APPARATUS AND METHOD FOR STABILIZING THE STORAGE OF VIDEO INFORMATION ON A RECORDING SURFACE

Family Applications After (5)

Application Number	Title	Priority Date	Filing Date
FR7824957A Granted FR2399087A1 (en)	1973-02-20	1978-08-29	APPARATUS AND METHOD FOR STORING AND RETURNING INFORMATION IN THE FORM OF A FREQUENCY MODULE SIGNAL ON AN INFORMATION STORAGE ELEMENT
FR7824958A Granted FR2399088A1 (en)	1973-02-20	1978-08-29	APPARATUS AND METHOD FOR RESTITUTING A MODULE FREQUENCY SIGNAL STORED ON AN INFORMATION STORAGE ELEMENT
FR7824959A Granted FR2399089A1 (en)	1973-02-20	1978-08-29	APPARATUS AND METHOD FOR MONITORING THE STORAGE OF VIDEO INFORMATION ON AN INFORMATION STORAGE ELEMENT
FR7824956A Granted FR2399086A1 (en)	1973-02-20	1978-08-29	APPARATUS AND METHOD FOR STORING INFORMATION IN THE FORM OF A FREQUENCY MODULE SIGNAL ON AN INFORMATION STORAGE ELEMENT
FR7824960A Granted FR2399090A1 (en)	1973-02-20	1978-08-29	APPARATUS AND METHOD FOR STABILIZING THE STORAGE OF VIDEO INFORMATION ON A RECORDING SURFACE

Country Status (7)

Country	Link
JP (12)	JPS502415A (en)
CA (1)	CA1013854A (en)
DE (6)	DE2403408C3 (en)
FR (6)	FR2218612B1 (en)
GB (1)	GB1462791A (en)
IT (1)	IT1008245B (en)
NL (5)	NL7402289A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP0005316A1 (en) *	1978-03-27	1979-11-14	Discovision Associates	Optical apparatus and process for recording information and record carrier formed by this apparatus; optical apparatus for retrieving the recorded information
FR2440134A1 (en) *	1978-10-23	1980-05-23	Mca Disco Vision	Video information recording and playback system - uses laser writing beam, intensity modulated with information to be stored to form tracks on video disc
FR2442460A1 (en) *	1978-11-22	1980-06-20	Mitsubishi Electric Corp	OPTICAL MODULATION DEVICE
EP0017571A1 (en) *	1979-04-03	1980-10-15	Thomson-Csf	Light intensity modulator in integrated optics and integrated optical circuit comprising such a modulator
FR2464608A1 (en) *	1978-10-17	1981-03-06	Mca Disco Vision	INFORMATION RECORDING MEDIUM
FR2504300A1 (en) *	1981-04-21	1982-10-22	Philips Nv	INFORMATION RECORDING AND READING DEVICE IN INFORMATION SLOTS OF AN OPTICAL RECORDING CARRIER

Families Citing this family (46)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4225873A (en) *	1978-03-27	1980-09-30	Mca Disco-Vision, Inc.	Recording and playback system
CA1074005A (en) *	1975-03-10	1980-03-18	James T. Russell	Recording and playback system
AU520835B2 (en) *	1977-03-24	1982-03-04	World Development Laboratories	Optical recording system and method
NL7802860A (en) *	1978-03-16	1979-09-18	Philips Nv	REGISTRATION CARRIER BODY AND REGISTRATION CARRIER FOR OPTICAL INFORMATION AND DEVICE FOR REGISTRATION AND READ OUT.
NL7901228A (en) *	1978-03-27	1979-10-01	Mca Disco Vision	MOTHER MACHINE.
JPS54146613A (en) *	1978-05-10	1979-11-16	Hitachi Ltd	Optical head
DK153609C (en) *	1978-09-22	1988-12-19	Discovision Ass	PROCEDURE AND APPARATUS FOR WRITING A SIGNAL INFORMATION TRACK ON A PLATE
DK153610C (en) *	1978-09-22	1988-12-12	Discovision Ass	PROCEDURE FOR WRITING A TRACK OF INFORMATION ON A PLATE
GB2040539B (en) *	1978-12-27	1983-01-26	Hitachi Ltd	Optical information recording apparatus
US4264986A (en) *	1979-03-12	1981-04-28	Willis Craig I	Information-recording process & apparatus
FR2462758A1 (en) *	1979-08-03	1981-02-13	Thomson Csf	OPTICAL DEVICE FOR ACCESSING A TRACK RUN BY AN INFORMATION CARRIER AND OPTICAL MEMORY SYSTEM COMPRISING SUCH A DEVICE
JPS5668935A (en) *	1979-10-22	1981-06-09	Discovision Ass	Device for recording dataasignal on movable optical recording medium
DE2949813C2 (en) *	1979-12-11	1987-04-30	Bts-Systementwicklungs Gmbh, 1000 Berlin	Device for recording image and sound information in the form of electrical signals on a video disc
US4574371A (en) *	1982-02-20	1986-03-04	Olympus Optical Company Limited	Apparatus for recording and reproducing information on an optical disc
JPS58147823A (en) *	1982-02-25	1983-09-02	Mitsubishi Electric Corp	Detector of track shift
US4517667A (en) *	1982-06-10	1985-05-14	Xerox Corporation	Direct read after write optical disk system
CA1201010A (en) *	1982-08-23	1986-02-25	Daniel G. Murray	Flavorings for sodium chloride substitutes
JPS5936338A (en) *	1982-08-24	1984-02-28	Matsushita Electric Ind Co Ltd	Optical disk recording and reproducing method
NL8300133A (en) *	1983-01-14	1984-08-01	Philips Nv	Apparatus for registering and / or reading information using a radiation beam.
DE3303038C1 (en) *	1983-01-29	1983-11-24	Kernforschungszentrum Karlsruhe Gmbh, 7500 Karlsruhe	Process for operating a filter unit for purifying air or gas streams and migrating bed filter unit for carrying out the process
JPS59191149A (en) *	1983-04-14	1984-10-30	Sanyo Electric Co Ltd	Mechanism for controlling optical record
JPS59209042A (en) *	1983-05-12	1984-11-27	Yaskawa Electric Mfg Co Ltd	Manufacture of laminated core of rotary electric machine with skew
JPS6096157A (en) *	1983-10-31	1985-05-29	Matsushita Electric Ind Co Ltd	Rotor of squirrel-cage induction motor
JPS6129421A (en) *	1984-06-15	1986-02-10	Olympus Optical Co Ltd	Detection of defect of optical recording medium
JPS61109239A (en) *	1984-11-01	1986-05-27	松下電工株式会社	Contact switch gear
JPS61184741A (en) *	1985-02-12	1986-08-18	Fujitsu Ltd	Optical recording and reproducing device
US4667256A (en) *	1985-11-25	1987-05-19	Eastman Kodak Company	Circuit for electro-optic modulators
JPS62252876A (en) *	1986-04-23	1987-11-04	鹿島建設株式会社	Refrigerator
JPH0614570B2 (en) *	1987-04-28	1994-02-23	シャープ株式会社	Optical output stabilizing method and photodetector used in the method
JPH0262734A (en) *	1988-08-30	1990-03-02	Hitachi Ltd	Split type optical head
US5265079A (en)	1991-02-15	1993-11-23	Applied Magnetics Corporation	Seek actuator for optical recording
US6141300A (en)	1989-06-20	2000-10-31	Discovision Associates	Optical actuator including lens assembly with optical axis having symmetric suspensory forces acting thereon and optical disc system including same
DE4030970C2 (en) *	1990-10-01	1996-07-11	Blaupunkt Werke Gmbh	Process for regulating the light output of a laser diode for reading optical storage disks and playback device therefor
US6069857A (en)	1991-02-15	2000-05-30	Discovision Associates	Optical disc system having improved circuitry for performing blank sector check on readable disc
US5729511A (en)	1991-02-15	1998-03-17	Discovision Associates	Optical disc system having servo motor and servo error detection assembly operated relative to monitored quad sum signal
US5677899A (en)	1991-02-15	1997-10-14	Discovision Associates	Method for moving carriage assembly from initial position to target position relative to storage medium
US6236625B1 (en)	1991-02-15	2001-05-22	Discovision Associates	Optical disc system having current monitoring circuit with controller for laser driver and method for operating same
JPH04349236A (en) *	1991-05-27	1992-12-03	Pioneer Electron Corp	Optical pick-up device
JP2555239B2 (en) *	1991-11-01	1996-11-20	株式会社日立製作所	Optical information recording / reproducing method
JPH071764U (en) *	1993-06-11	1995-01-13	ダイワ精工株式会社	Drag force adjuster for fishing reels
JPH07185243A (en) *	1993-12-24	1995-07-25	Nippon Spindle Mfg Co Ltd	Dust collector
US6091684A (en)	1995-01-25	2000-07-18	Discovision Associates	Optical disc system and method for changing the rotational rate of an information storage medium
US6434087B1 (en)	1995-01-25	2002-08-13	Discovision Associates	Optical disc system and method for controlling bias coil and light source to process information on a storage medium
US5748578A (en)	1995-01-25	1998-05-05	Discovision Associates	Colpitts type oscillator having reduced ringing and improved optical disc system utilizing same
US5920539A (en)	1995-01-25	1999-07-06	Discovision Associates	Apparatus and method for suppression of electromagnetic emissions having a groove on an external surface for passing an electrical conductor
US6049518A (en) *	1995-08-31	2000-04-11	Sanyo Electric Co., Ltd.	Optical disc recording/reproducing apparatus recording/reproducing information to/from optical discs according to different standards

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* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US2958258A (en) *	1953-09-21	1960-11-01	Technicolor Corp	Optical projection of beam controlled object fields
NL243565A (en) *	1958-08-25	1900-01-01
US3283310A (en) *	1959-08-21	1966-11-01	Gen Electric	Thermoplastic film tape recorder
US3234326A (en) *	1960-12-23	1966-02-08	Columbia Broadcasting Syst Inc	Film recording reproducing apparatus
US3350503A (en) *	1962-03-21	1967-10-31	Minnesota Mining & Mfg	Electron beam recording and reproducing system
US3361873A (en) *	1962-05-07	1968-01-02	Minnesota Mining & Mfg	Disc recording system
US3365706A (en) *	1964-04-15	1968-01-23	Gilbert W. King	Photo-optical data storage and retrieval system employing error detection and error location identification components
US3396266A (en) *	1964-05-25	1968-08-06	Ibm	Optical information read-out system
US3368209A (en) *	1964-10-22	1968-02-06	Honeywell Inc	Laser actuated curie point recording and readout system
US3444317A (en) *	1965-11-03	1969-05-13	Minnesota Mining & Mfg	Electron beam recorder with frame rate conversion
US3474457A (en) *	1967-11-13	1969-10-21	Precision Instr Co	Laser recording apparatus
DE1574687B2 (en) *	1968-02-06	1978-08-10	Robert Bosch Gmbh, 7000 Stuttgart	Data carriers for information
US3530258A (en) *	1968-06-28	1970-09-22	Mca Technology Inc	Video signal transducer having servo controlled flexible fiber optic track centering
US3657707A (en) *	1969-03-17	1972-04-18	Precision Instr Co	Laser recording system with both surface defect and data error checking
US3579145A (en) *	1969-03-21	1971-05-18	Bell Telephone Labor Inc	Modulator stabilization circuits
US3646568A (en) *	1969-04-03	1972-02-29	Rca Corp	Beam control system
US3696344A (en) *	1970-02-19	1972-10-03	Energy Conversion Devices Inc	Optical mass memory employing amorphous thin films
US3625617A (en) *	1970-07-15	1971-12-07	Honeywell Inc	Kerr effect read-out system for an optical memory
DE2048430B2 (en) *	1970-10-02	1972-11-30	Licentia Patent-Verwaltungs-GmbH, 6000 Prankfurt	METHOD FOR GENERATING PREFERABLY MECHANICALLY SCANABLE, RELIEF-LIKE RECESSES OR Bumps on the surface of an information carrier
DE2113717C3 (en) *	1971-03-22	1974-01-10	Philips Patentverwaltung Gmbh, 2000 Hamburg	Image-sound magnetic tape recorder
US3715740A (en) *	1971-08-30	1973-02-06	Honeywell Inc	Optical mass memory
US3716845A (en) *	1972-03-09	1973-02-13	Honeywell Inc	Optical memory with interferometer tracking
AR198680A1 (en) *	1972-09-02	1974-07-15	Philips Nv	READING DEVICE OF A RECORDING CARRIER ON WHICH INFORMATION IS RECORDED ON AT LEAST ONE TRACK

1973
- 1973-12-18 CA CA188,420A patent/CA1013854A/en not_active Expired
1974
- 1974-01-17 FR FR7401660A patent/FR2218612B1/fr not_active Expired
- 1974-01-24 DE DE742403408A patent/DE2403408C3/en not_active Expired
- 1974-01-24 DE DE2462831A patent/DE2462831C2/en not_active Expired
- 1974-01-24 DE DE2463376A patent/DE2463376C2/en not_active Expired
- 1974-01-24 DE DE2462834A patent/DE2462834C2/en not_active Expired
- 1974-01-24 DE DE2462835A patent/DE2462835C2/en not_active Expired
- 1974-01-24 DE DE2462833A patent/DE2462833C2/en not_active Expired
- 1974-01-26 JP JP49011369A patent/JPS502415A/ja active Pending
- 1974-02-15 GB GB702174A patent/GB1462791A/en not_active Expired
- 1974-02-19 IT IT48443/74A patent/IT1008245B/en active
- 1974-02-19 NL NL7402289A patent/NL7402289A/xx not_active Application Discontinuation
1978
- 1978-08-29 FR FR7824957A patent/FR2399087A1/en active Granted
- 1978-08-29 FR FR7824958A patent/FR2399088A1/en active Granted
- 1978-08-29 FR FR7824959A patent/FR2399089A1/en active Granted
- 1978-08-29 FR FR7824956A patent/FR2399086A1/en active Granted
- 1978-08-29 FR FR7824960A patent/FR2399090A1/en active Granted
1979
- 1979-07-26 JP JP9434679A patent/JPS5525888A/en active Granted
- 1979-07-26 JP JP9435079A patent/JPS5525892A/en active Granted
- 1979-07-26 JP JP9434979A patent/JPS5525891A/en active Granted
- 1979-07-26 JP JP9434879A patent/JPS5525890A/en active Granted
- 1979-07-26 JP JP9434779A patent/JPS5525889A/en active Pending
1982
- 1982-01-19 JP JP57005485A patent/JPS57147140A/en active Granted
1983
- 1983-02-14 JP JP58021742A patent/JPS58161159A/en active Granted
- 1983-02-14 JP JP58021744A patent/JPS58161153A/en active Pending
- 1983-02-14 JP JP58021743A patent/JPS58161143A/en active Pending
1986
- 1986-05-27 JP JP61120335A patent/JPS6224440A/en active Pending
- 1986-05-27 JP JP61120336A patent/JPS6224441A/en active Pending
1988
- 1988-03-30 NL NL8800808A patent/NL8800808A/en not_active Application Discontinuation
- 1988-03-30 NL NL8800807A patent/NL8800807A/en not_active Application Discontinuation
- 1988-03-30 NL NL8800809A patent/NL8800809A/en not_active Application Discontinuation
- 1988-03-30 NL NL8800806A patent/NL8800806A/en not_active Application Discontinuation

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP0005316A1 (en) *	1978-03-27	1979-11-14	Discovision Associates	Optical apparatus and process for recording information and record carrier formed by this apparatus; optical apparatus for retrieving the recorded information
EP0044603A2 (en) *	1978-03-27	1982-01-27	Discovision Associates	Apparatus and method for writing a signal information track on a disc
EP0048041A2 (en) *	1978-03-27	1982-03-24	Discovision Associates	Method and apparatus for writing a signal-information track by using a radiation beam
EP0048041A3 (en) *	1978-03-27	1982-08-04	Discovision Associates	Method and apparatus for writing a signal-information track by using a radiation beam
EP0044603B1 (en) *	1978-03-27	1985-07-10	Discovision Associates	Apparatus and method for writing a signal information track on a disc
FR2464608A1 (en) *	1978-10-17	1981-03-06	Mca Disco Vision	INFORMATION RECORDING MEDIUM
FR2440134A1 (en) *	1978-10-23	1980-05-23	Mca Disco Vision	Video information recording and playback system - uses laser writing beam, intensity modulated with information to be stored to form tracks on video disc
FR2442460A1 (en) *	1978-11-22	1980-06-20	Mitsubishi Electric Corp	OPTICAL MODULATION DEVICE
EP0017571A1 (en) *	1979-04-03	1980-10-15	Thomson-Csf	Light intensity modulator in integrated optics and integrated optical circuit comprising such a modulator
FR2453426A1 (en) *	1979-04-03	1980-10-31	Thomson Csf	LIGHT INTENSITY MODULATOR IN INTEGRATED OPTICS AND INTEGRATED OPTICAL CIRCUIT COMPRISING SUCH A MODULATOR
FR2504300A1 (en) *	1981-04-21	1982-10-22	Philips Nv	INFORMATION RECORDING AND READING DEVICE IN INFORMATION SLOTS OF AN OPTICAL RECORDING CARRIER

Also Published As

Publication number	Publication date
JPS6235170B2 (en)	1987-07-31
JPS5525891A (en)	1980-02-23
JPS5732411B2 (en)	1982-07-10
FR2399087B1 (en)	1982-12-03
FR2399088A1 (en)	1979-02-23
JPS5732412B2 (en)	1982-07-10
DE2462835C2 (en)	1983-03-24
CA1013854A (en)	1977-07-12
JPS5525890A (en)	1980-02-23
JPS6224440A (en)	1987-02-02
JPS58161143A (en)	1983-09-24
FR2399087A1 (en)	1979-02-23
NL8800807A (en)	1988-07-01
FR2399086B1 (en)	1982-12-03
JPS5525888A (en)	1980-02-23
JPS57147140A (en)	1982-09-10
JPS5525889A (en)	1980-02-23
FR2399089B1 (en)	1982-12-03
NL8800806A (en)	1988-07-01
GB1462791A (en)	1977-01-26
JPS6224441A (en)	1987-02-02
DE2462831C2 (en)	1983-03-24
DE2403408A1 (en)	1974-08-29
FR2399088B1 (en)	1982-12-03
NL7402289A (en)	1974-08-22
NL8800809A (en)	1988-07-01
DE2462834C2 (en)	1988-08-18
FR2399089A1 (en)	1979-02-23
FR2399090A1 (en)	1979-02-23
NL8800808A (en)	1988-07-01
JPS502415A (en)	1975-01-11
JPS58161153A (en)	1983-09-24
IT1008245B (en)	1976-11-10
JPS58161159A (en)	1983-09-24
JPS6338771B2 (en)	1988-08-02
FR2399086A1 (en)	1979-02-23
JPS5736649B2 (en)	1982-08-05
JPS571052B2 (en)	1982-01-09
FR2218612B1 (en)	1980-03-07
FR2399090B1 (en)	1982-12-03
DE2403408B2 (en)	1978-06-29
DE2462833C2 (en)	1983-02-10
DE2403408C3 (en)	1979-03-01
JPS5525892A (en)	1980-02-23
DE2463376C2 (en)	1985-10-17

Legal Events

Date	Code	Title	Description
1984-10-26	CD	Change of name or company name
1984-11-30	TP	Transmission of property

Publication	Publication Date	Title
AR201758A1 (en)	1975-04-15
AU476761B2 (en)	1976-09-30
FR2399087B1 (en)	1982-12-03
AU474511B2 (en)	1976-07-22
AU471343B2 (en)	1976-04-15
AU472848B2 (en)	1976-06-03
AU477823B2 (en)	1975-06-19
AR210729A1 (en)	1977-09-15
AU476873B1 (en)	1975-01-09
AU471461B2 (en)	1976-04-29
AU477824B2 (en)	1975-07-17
AU1891376A (en)	1977-01-20
AU479522A (en)	1975-06-12
AU479496A (en)	1975-01-09
CH563060A5 (en)	1975-06-13
CH564368A5 (en)	1975-07-31
CH564872A5 (en)	1975-07-31
CH565968A5 (en)	1975-08-29
BG19414A1 (en)	1975-06-25
BG19221A1 (en)	1975-06-15
AU479562A (en)	1975-01-09
AU479539A (en)	1975-01-30
CH560994A5 (en)	1975-04-15
BG20153A1 (en)	1975-11-05
AU479504A (en)	1975-05-29