FR2399089B1 - - Google Patents

Info

Publication number
FR2399089B1
FR2399089B1 FR7824959A FR7824959A FR2399089B1 FR 2399089 B1 FR2399089 B1 FR 2399089B1 FR 7824959 A FR7824959 A FR 7824959A FR 7824959 A FR7824959 A FR 7824959A FR 2399089 B1 FR2399089 B1 FR 2399089B1
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.)
Expired
Application number
FR7824959A
Other languages
French (fr)
Other versions
FR2399089A1 (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 FR2399089A1 publication Critical patent/FR2399089A1/en
Application granted granted Critical
Publication of FR2399089B1 publication Critical patent/FR2399089B1/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)
FR7824959A 1973-02-20 1978-08-29 APPARATUS AND METHOD FOR MONITORING THE STORAGE OF VIDEO INFORMATION ON AN INFORMATION STORAGE ELEMENT Granted FR2399089A1 (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
FR2399089A1 FR2399089A1 (en) 1979-02-23
FR2399089B1 true FR2399089B1 (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 (2)

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

Family Applications After (3)

Application Number Title Priority Date Filing Date
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

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)

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US4225873A (en) * 1978-03-27 1980-09-30 Mca Disco-Vision, Inc. Recording and playback system
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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.
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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.
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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
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NL8300133A (en) * 1983-01-14 1984-08-01 Philips Nv Apparatus for registering and / or reading information using a radiation beam.
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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

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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
FR2399090A1 (en) 1979-02-23
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
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

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CD Change of name or company name
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