FR2422219A1 - Appareil d'enregistrement d'informations - Google Patents

Appareil d'enregistrement d'informations

Info

Publication number
FR2422219A1
FR2422219A1 FR7908808A FR7908808A FR2422219A1 FR 2422219 A1 FR2422219 A1 FR 2422219A1 FR 7908808 A FR7908808 A FR 7908808A FR 7908808 A FR7908808 A FR 7908808A FR 2422219 A1 FR2422219 A1 FR 2422219A1
Authority
FR
France
Prior art keywords
information recording
recording medium
recording device
information
laser beam
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
FR7908808A
Other languages
English (en)
Other versions
FR2422219B1 (fr
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Publication of FR2422219A1 publication Critical patent/FR2422219A1/fr
Application granted granted Critical
Publication of FR2422219B1 publication Critical patent/FR2422219B1/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
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0908—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for focusing only
    • G11B7/0909—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for focusing only by astigmatic methods

Landscapes

  • Optical Recording Or Reproduction (AREA)
  • Automatic Focus Adjustment (AREA)

Abstract

Dans l'appareil d'enregistrement d'informations selon la présente invention, on enregistre sur un milieu d'enregistrement d'un disque 21 des informations à l'aide d'un faisceau laser 18 d'une source laser 16. Une partie du faisceau laser réfléchi par le milieu d'enregistrement est dirigée par un système optique 22-23 sur un dérecteur de lumière en vue de la détection de cette partie de faisceau pour commander automatiquement la focalisation du faisceau 18 sur le milieu d'enregistrement. Application : vidéodisques.
FR7908808A 1978-04-07 1979-04-06 Appareil d'enregistrement d'informations Granted FR2422219A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4033478A JPS54133305A (en) 1978-04-07 1978-04-07 Information recorder

Publications (2)

Publication Number Publication Date
FR2422219A1 true FR2422219A1 (fr) 1979-11-02
FR2422219B1 FR2422219B1 (fr) 1983-08-19

Family

ID=12577716

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7908808A Granted FR2422219A1 (fr) 1978-04-07 1979-04-06 Appareil d'enregistrement d'informations

Country Status (7)

Country Link
US (1) US4556965A (fr)
JP (1) JPS54133305A (fr)
CA (1) CA1139440A (fr)
DE (1) DE2913778A1 (fr)
FR (1) FR2422219A1 (fr)
GB (1) GB2019044B (fr)
NL (1) NL7902676A (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2504281A1 (fr) * 1981-04-16 1982-10-22 Euromask Appareil de projection a dispositif de mise au point
JPS57200912A (en) * 1981-06-04 1982-12-09 Pioneer Electronic Corp Information recording system
US4574371A (en) * 1982-02-20 1986-03-04 Olympus Optical Company Limited Apparatus for recording and reproducing information on an optical disc
US4499569A (en) * 1982-09-07 1985-02-12 Discovision Associates Writing beam focus monitor
US4670869A (en) * 1984-01-03 1987-06-02 Magnetic Peripherals Inc. Switching laser beam apparatus with recombined beam for recording
JPS60171638A (ja) * 1984-02-16 1985-09-05 Matsushita Electric Ind Co Ltd 情報再生装置
US4998234A (en) * 1987-03-31 1991-03-05 Rees Theodore D Logarithmic servo error detection for optical disk drive

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL6901303A (fr) * 1968-02-17 1969-08-19
FR2251021A1 (en) * 1973-11-09 1975-06-06 Hitachi Ltd Automatic focussing system for laser beam on to moving object - has out of focus detector of beam of surface producing signal in feedback to correct
US3912922A (en) * 1973-03-19 1975-10-14 Thomson Brandt Optical sensor for determining the focussing error in an optical illumination system embodying a projection lens
US3925603A (en) * 1973-06-11 1975-12-09 Sony Corp Apparatus for recording and/or reproducing information signals having automatic focusing
US3969575A (en) * 1974-08-08 1976-07-13 U.S. Philips Corporation Opto-electronic focus detection system
FR2304981A1 (fr) * 1975-03-21 1976-10-15 Thomson Brandt Dispositif d'enregistrement optique d'informations
FR2393362A1 (fr) * 1977-06-02 1978-12-29 Bosch Gmbh Robert Dispositif automatique de reglage sans contact d'une distance, dans l'enregistrement et la reproduction optiques de signaux
FR2420182A1 (fr) * 1978-03-16 1979-10-12 Philips Nv Procede, dispositif et corps porteur d'enregistrement pour l'enregistrement d'information par voie optique

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1593883A (fr) * 1968-02-17 1970-06-01
US3665483A (en) * 1969-06-06 1972-05-23 Chase Manhattan Capital Corp Laser recording medium
US3866238A (en) * 1973-06-01 1975-02-11 North Electric Co Laser diode for use with film memory system
JPS5442266B2 (fr) * 1973-07-27 1979-12-13
NL7313454A (nl) * 1973-10-01 1975-04-03 Philips Nv Opto-elektronisch stelsel voor het bepalen van een king tussen de werkelijke positie van een stralings kterend vlak in een optisch afbeeldingsstelsel en d ste positie van dit vlak.
US4069487A (en) * 1974-12-26 1978-01-17 Canon Kabushiki Kaisha Recording member and process for recording
NL7504783A (nl) * 1975-04-23 1976-10-26 Philips Nv Stralingsgevoelig materiaal.
DE2630381C2 (de) * 1975-07-07 1983-05-26 Pioneer Electronic Corp., Tokyo Optischer Leser
FR2325987A1 (fr) * 1975-09-29 1977-04-22 Thomson Brandt Dispositif de lecture optique d'un enregistrement
US4065786A (en) * 1975-09-30 1977-12-27 Rca Corporation Videodisc playback system
US4110607A (en) * 1975-12-22 1978-08-29 Victor Company Of Japan, Ltd. System for detecting height fluctuations of a surface on a recording medium in an optical recording or reproducing apparatus
NL7600843A (nl) * 1976-01-28 1977-08-01 Philips Nv Inrichting voor het uitlezen van een registratie- drager waarop informatie, bijvoorbeeld en/of ge- luidsinformatie, is aangebracht.
JPS52120805A (en) * 1976-04-02 1977-10-11 Sony Corp Servo apparatus
GB1532345A (en) * 1976-06-25 1978-11-15 Hitachi Ltd Information play-back apparatus
NL7708200A (nl) * 1976-07-28 1978-01-31 Hitachi Ltd Automatische scherpstellingsinrichting.
NL7608561A (nl) * 1976-08-02 1978-02-06 Philips Nv Optische uitleeseenheid voor het aftasten van een registratiedrager voorzien van een stra- lingsreflekterende informatiestruktuur.
JPS606014B2 (ja) * 1976-10-07 1985-02-15 ソニー株式会社 情報検出装置
JPS54102107A (en) * 1978-01-30 1979-08-11 Hitachi Ltd Control information detecting method
JPS54143109A (en) * 1978-04-28 1979-11-08 Hitachi Ltd Optical information device

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL6901303A (fr) * 1968-02-17 1969-08-19
US3912922A (en) * 1973-03-19 1975-10-14 Thomson Brandt Optical sensor for determining the focussing error in an optical illumination system embodying a projection lens
US3925603A (en) * 1973-06-11 1975-12-09 Sony Corp Apparatus for recording and/or reproducing information signals having automatic focusing
FR2251021A1 (en) * 1973-11-09 1975-06-06 Hitachi Ltd Automatic focussing system for laser beam on to moving object - has out of focus detector of beam of surface producing signal in feedback to correct
US3969575A (en) * 1974-08-08 1976-07-13 U.S. Philips Corporation Opto-electronic focus detection system
FR2304981A1 (fr) * 1975-03-21 1976-10-15 Thomson Brandt Dispositif d'enregistrement optique d'informations
FR2393362A1 (fr) * 1977-06-02 1978-12-29 Bosch Gmbh Robert Dispositif automatique de reglage sans contact d'une distance, dans l'enregistrement et la reproduction optiques de signaux
FR2420182A1 (fr) * 1978-03-16 1979-10-12 Philips Nv Procede, dispositif et corps porteur d'enregistrement pour l'enregistrement d'information par voie optique

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
EXBK/77 *

Also Published As

Publication number Publication date
GB2019044B (en) 1982-09-08
US4556965A (en) 1985-12-03
JPH0115931B2 (fr) 1989-03-22
GB2019044A (en) 1979-10-24
CA1139440A (fr) 1983-01-11
FR2422219B1 (fr) 1983-08-19
NL7902676A (nl) 1979-10-09
JPS54133305A (en) 1979-10-17
DE2913778A1 (de) 1979-10-18

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