FR2399090A1 - APPARATUS AND METHOD FOR STABILIZING THE STORAGE OF VIDEO INFORMATION ON A RECORDING SURFACE - Google Patents

APPARATUS AND METHOD FOR STABILIZING THE STORAGE OF VIDEO INFORMATION ON A RECORDING SURFACE

Info

Publication number
FR2399090A1
FR2399090A1 FR7824960A FR7824960A FR2399090A1 FR 2399090 A1 FR2399090 A1 FR 2399090A1 FR 7824960 A FR7824960 A FR 7824960A FR 7824960 A FR7824960 A FR 7824960A FR 2399090 A1 FR2399090 A1 FR 2399090A1
Authority
FR
France
Prior art keywords
video information
stabilizing
storage
recording surface
disc
Prior art date
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
FR7824960A
Other languages
French (fr)
Other versions
FR2399090B1 (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.)
Filing date
Publication date
Application filed by MCA Discovision Inc filed Critical MCA Discovision Inc
Publication of FR2399090A1 publication Critical patent/FR2399090A1/en
Application granted granted Critical
Publication of FR2399090B1 publication Critical patent/FR2399090B1/fr
Granted 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)
  • Theoretical Computer Science (AREA)
  • Signal Processing (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (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)

Abstract

L'invention concerne les appareils d'écriture et de lecture d'informations vidéo. Elle se rapporte à un appareil destiné à faire tourner un disque 18 sur lequel un objectif 14 permet l'écriture d'informations par un faisceau laser d'une source 30, le faisceau passant dans une cellule 32 de Pockels et dans un prisme 38 de Glan, la cellule 32 étant modulée par l'information vidéo à reproduire sur le disque 18. Application à la réalisation de disque vidéo.The invention relates to devices for writing and reading video information. It relates to an apparatus intended to rotate a disc 18 on which an objective 14 allows the writing of information by a laser beam from a source 30, the beam passing through a Pockels cell 32 and into a prism 38 of Glan, the cell 32 being modulated by the video information to be reproduced on the disc 18. Application to the production of a video disc.

FR7824960A 1973-02-20 1978-08-29 APPARATUS AND METHOD FOR STABILIZING THE STORAGE OF VIDEO INFORMATION ON A RECORDING SURFACE Granted FR2399090A1 (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
FR2399090A1 true FR2399090A1 (en) 1979-02-23
FR2399090B1 FR2399090B1 (en) 1982-12-03

Family

ID=23303311

Family Applications (6)

Application Number Title Priority Date Filing Date
FR7401660A Expired FR2218612B1 (en) 1973-02-20 1974-01-17
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
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
FR7824960A Granted FR2399090A1 (en) 1973-02-20 1978-08-29 APPARATUS AND METHOD FOR STABILIZING THE STORAGE OF VIDEO INFORMATION ON A RECORDING SURFACE
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
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

Family Applications Before (3)

Application Number Title Priority Date Filing Date
FR7401660A Expired FR2218612B1 (en) 1973-02-20 1974-01-17
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
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

Family Applications After (2)

Application Number Title Priority Date Filing Date
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
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

Country Status (7)

Country Link
JP (12) JPS502415A (en)
CA (1) CA1013854A (en)
DE (6) DE2462831C2 (en)
FR (6) FR2218612B1 (en)
GB (1) GB1462791A (en)
IT (1) IT1008245B (en)
NL (5) NL7402289A (en)

Cited By (1)

* 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

Families Citing this family (51)

* 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
DK153610C (en) * 1978-09-22 1988-12-12 Discovision Ass PROCEDURE FOR WRITING A TRACK OF INFORMATION ON A PLATE
DK153609C (en) * 1978-09-22 1988-12-19 Discovision Ass PROCEDURE AND APPARATUS FOR WRITING A SIGNAL INFORMATION TRACK ON A PLATE
CH636466A5 (en) * 1978-10-17 1983-05-31 Mca Disco Vision Method and device for recording information in the form of a frequency-modulated signal
BE871326A (en) * 1978-10-23 1979-04-17 Mca Disco Vision METHOD AND DEVICE FOR RECORDING AND REPRODUCING A VIDEO SIGNAL.
JPS605926B2 (en) * 1978-11-22 1985-02-14 三菱電機株式会社 light modulator
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
FR2453426A1 (en) * 1979-04-03 1980-10-31 Thomson Csf LIGHT INTENSITY MODULATOR IN INTEGRATED OPTICS AND INTEGRATED OPTICAL CIRCUIT COMPRISING SUCH A MODULATOR
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
NL8101932A (en) * 1981-04-21 1982-11-16 Philips Nv DEVICE FOR RECORDING AND READING INFORMATION TRACKS IN AN OPTICAL RECORD CARRIER.
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
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
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
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
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
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
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

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3579145A (en) * 1969-03-21 1971-05-18 Bell Telephone Labor Inc Modulator stabilization circuits
DE2048430A1 (en) * 1970-10-02 1972-04-06 Licentia Gmbh Etching information carrier - through masking coat partly removed by laser beam

Family Cites Families (21)

* 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
NL242557A (en) * 1958-08-25 1900-01-01
US3328776A (en) * 1959-08-21 1967-06-27 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
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
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

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3579145A (en) * 1969-03-21 1971-05-18 Bell Telephone Labor Inc Modulator stabilization circuits
DE2048430A1 (en) * 1970-10-02 1972-04-06 Licentia Gmbh Etching information carrier - through masking coat partly removed by laser beam

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
EXBK/71 *
NO002860/66 *
NO002863/68 *
NV1234/77 *
NV8080/68 *

Cited By (3)

* 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
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

Also Published As

Publication number Publication date
FR2399086A1 (en) 1979-02-23
FR2399089A1 (en) 1979-02-23
NL8800808A (en) 1988-07-01
JPS6235170B2 (en) 1987-07-31
JPS5525890A (en) 1980-02-23
JPS5732412B2 (en) 1982-07-10
GB1462791A (en) 1977-01-26
FR2399087A1 (en) 1979-02-23
FR2399090B1 (en) 1982-12-03
JPS58161159A (en) 1983-09-24
JPS57147140A (en) 1982-09-10
DE2462835C2 (en) 1983-03-24
FR2399087B1 (en) 1982-12-03
JPS5525891A (en) 1980-02-23
FR2218612A1 (en) 1974-09-13
NL7402289A (en) 1974-08-22
JPS58161143A (en) 1983-09-24
FR2218612B1 (en) 1980-03-07
NL8800806A (en) 1988-07-01
DE2462831C2 (en) 1983-03-24
JPS5732411B2 (en) 1982-07-10
FR2399088A1 (en) 1979-02-23
JPS5525888A (en) 1980-02-23
DE2403408C3 (en) 1979-03-01
FR2399086B1 (en) 1982-12-03
DE2463376C2 (en) 1985-10-17
FR2399088B1 (en) 1982-12-03
JPS5736649B2 (en) 1982-08-05
JPS571052B2 (en) 1982-01-09
JPS5525892A (en) 1980-02-23
FR2399089B1 (en) 1982-12-03
CA1013854A (en) 1977-07-12
JPS502415A (en) 1975-01-11
NL8800809A (en) 1988-07-01
JPS58161153A (en) 1983-09-24
DE2462834C2 (en) 1988-08-18
JPS6224441A (en) 1987-02-02
NL8800807A (en) 1988-07-01
DE2403408B2 (en) 1978-06-29
JPS6338771B2 (en) 1988-08-02
JPS5525889A (en) 1980-02-23
DE2462833C2 (en) 1983-02-10
JPS6224440A (en) 1987-02-02
IT1008245B (en) 1976-11-10
DE2403408A1 (en) 1974-08-29

Similar Documents

Publication Publication Date Title
FR2399090A1 (en) APPARATUS AND METHOD FOR STABILIZING THE STORAGE OF VIDEO INFORMATION ON A RECORDING SURFACE
SE7510783L (en) OPTICAL MONITORING SERVICE AND CONTEMPORARY READING OF AN INFORMATION CHANNEL ON A VIDEO DISC
ES458637A1 (en) Optical scanning device
FR2414237A1 (en) OPTICAL INFORMATION READING DEVICE
NL7612996A (en) DEVICE FOR OPTICAL READING OF SIGNAL INFORMATION RECORDED ACCORDING TO A RECORDING TRACK ON A REFLECTIVE SURFACE OF A RECORDING MEDIUM.
FR2368190A1 (en) OPTICAL READING DEVICE FOR SIGNALS RECORDED ON A MEDIA
FR2603127A1 (en) DEVICE AND METHOD FOR THE REVERSIBLE OPTICAL STORAGE OF INFORMATION WITH A RECORDING MEDIUM IN THE FORM OF POLYMERIC LIQUID CRYSTALS, USE OF THE DEVICE AND HOMOPOLYMERS USED
FR2315140A1 (en) APPARATUS FOR OPTICALLY REPRODUCING INFORMATION PRESENTED ON AN INFORMATION STORAGE MEDIA
FR2493017B1 (en) READING ASSEMBLY FOR AN OPTICAL READING APPARATUS OF INFORMATION RECORDED ON A DISC IN THE FORM OF ONE OR MORE TRACKS
FR2355337A1 (en) Optical read-write system for disc memories - has disc sandwiched between covers to prevent errors due to dust particles or surface scratches (NL 20.12.77)
BE850781A (en) DEVICE FOR READING A RECORDING MEDIA PRESENTING AN OPTICAL READABLE INFORMATION STRUCTURE
FR2358797A1 (en) AUTOMATIC CORRECTION SYSTEM OF THE CARRIER WAVE FORM FACTOR RESULTING FROM READING AN INFORMATION MEDIA
JPS5345506A (en) Information detecting apparatus
FR2439522A1 (en) RECORDING HOLDER WITH INFORMATION STORAGE IN AN OPTICALLY READABLE INFORMATION STRUCTURE
CH479989A (en) Apparatus for reproducing chromatic image information recorded on a recording medium
AT349077B (en) FOCUSING SYSTEM FOR OPTICAL RECORDING MEDIA
BE904283A (en) METHOD FOR OPTICALLY STORING INFORMATION, FOR READING AN OPTICAL STORAGE MEDIUM, OPTICAL STORAGE AND OPTICAL RECORDING SYSTEM, OPTICAL STORAGE AND OPTICAL DATA RECORDING SYSTEM.
FR2385170A1 (en) PROCESS AND APPARATUS FOR RECORDING INFORMATION
ES434685A1 (en) Videodisc reader with concave mirror elements
GB1509495A (en) Record disc and method of producing the same
JPS5424002A (en) Reproducer of optical information recording medium discs
FR2422219A1 (en) INFORMATION RECORDING DEVICE
JPS57191837A (en) Optical recording and reproducing device
SU436391A1 (en)
GB1490223A (en) Apparatus for optically reading a record carrier

Legal Events

Date Code Title Description
CD Change of name or company name
TP Transmission of property