FR2330062A1 - Dispositif de recherche de focalisation et lecteur optique comportant un tel dispositif - Google Patents

Dispositif de recherche de focalisation et lecteur optique comportant un tel dispositif

Info

Publication number
FR2330062A1
FR2330062A1 FR7533465A FR7533465A FR2330062A1 FR 2330062 A1 FR2330062 A1 FR 2330062A1 FR 7533465 A FR7533465 A FR 7533465A FR 7533465 A FR7533465 A FR 7533465A FR 2330062 A1 FR2330062 A1 FR 2330062A1
Authority
FR
France
Prior art keywords
optical reader
focus search
reader including
search device
focus
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
FR7533465A
Other languages
English (en)
Other versions
FR2330062B1 (fr
Inventor
Gerald Roullet
Jean-Pierre Bortuzzo
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.)
Thomson-Brandt SA
Original Assignee
Thomson-Brandt SA
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 Thomson-Brandt SA filed Critical Thomson-Brandt SA
Priority to FR7533465A priority Critical patent/FR2330062A1/fr
Priority to US05/735,891 priority patent/US4128847A/en
Priority to GB44955/76A priority patent/GB1561541A/en
Priority to CA264,603A priority patent/CA1073254A/fr
Priority to DE2649688A priority patent/DE2649688C2/de
Priority to JP51131557A priority patent/JPS5838855B2/ja
Publication of FR2330062A1 publication Critical patent/FR2330062A1/fr
Application granted granted Critical
Publication of FR2330062B1 publication Critical patent/FR2330062B1/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
    • 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
    • G11B7/0857—Arrangements for mechanically moving the whole head

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Automatic Focus Adjustment (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
FR7533465A 1975-10-31 1975-10-31 Dispositif de recherche de focalisation et lecteur optique comportant un tel dispositif Granted FR2330062A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
FR7533465A FR2330062A1 (fr) 1975-10-31 1975-10-31 Dispositif de recherche de focalisation et lecteur optique comportant un tel dispositif
US05/735,891 US4128847A (en) 1975-10-31 1976-10-26 Optical reading device comprising a focussing detection device
GB44955/76A GB1561541A (en) 1975-10-31 1976-10-28 Optical reading device comprising a focusing de
CA264,603A CA1073254A (fr) 1975-10-31 1976-10-28 Lecteur optique avec detecteur a focalisation
DE2649688A DE2649688C2 (de) 1975-10-31 1976-10-29 Einrichtung zur Steuerung der Fokussierung eines Lichtbündels auf einem optisch lesbaren beweglichen Informationsträger
JP51131557A JPS5838855B2 (ja) 1975-10-31 1976-11-01 光学的読取装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7533465A FR2330062A1 (fr) 1975-10-31 1975-10-31 Dispositif de recherche de focalisation et lecteur optique comportant un tel dispositif

Publications (2)

Publication Number Publication Date
FR2330062A1 true FR2330062A1 (fr) 1977-05-27
FR2330062B1 FR2330062B1 (fr) 1979-07-06

Family

ID=9161915

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7533465A Granted FR2330062A1 (fr) 1975-10-31 1975-10-31 Dispositif de recherche de focalisation et lecteur optique comportant un tel dispositif

Country Status (6)

Country Link
US (1) US4128847A (fr)
JP (1) JPS5838855B2 (fr)
CA (1) CA1073254A (fr)
DE (1) DE2649688C2 (fr)
FR (1) FR2330062A1 (fr)
GB (1) GB1561541A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0020199A1 (fr) * 1979-05-31 1980-12-10 Thomson-Brandt Système de commande de changement de face lue pour un lecteur optique de support d'information
WO1986005306A1 (fr) * 1985-03-09 1986-09-12 Deutsche Thomson-Brandt Gmbh Procede et conception de circuit pour la focalisation d'un faisceau lumineux sur un support d'enregistrement optique

Families Citing this family (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1131361A (fr) * 1977-05-11 1982-09-07 Fumitaka Kotaka Servomecanisme de focalisation pour afficheur optique
SE7813460L (sv) * 1978-03-27 1979-09-28 Mca Disco Vision Videoskivspelare
US4439848A (en) * 1978-03-27 1984-03-27 Discovision Associates Focusing system for video disc player
JPS6038771B2 (ja) * 1978-06-19 1985-09-03 パイオニア株式会社 光学式情報読取装置のサ−ボ装置
US4374323A (en) * 1978-06-30 1983-02-15 Discovision Associates Focusing apparatus for use in a system for recovering information from an optically-readable storage medium
JPS5538639A (en) * 1978-09-07 1980-03-18 Pioneer Video Corp Servo drawing-in unit for focus lens of optical information reader
US4223349A (en) * 1978-11-16 1980-09-16 Mca Discovision, Inc. System for rotating an information storage disc at a variable angular velocity to recover information therefrom at a prescribed constant rate
US4383757A (en) * 1979-04-02 1983-05-17 Optimetrix Corporation Optical focusing system
US4540278A (en) * 1979-04-02 1985-09-10 Optimetrix Corporation Optical focusing system
JPS6030015B2 (ja) * 1979-05-09 1985-07-13 株式会社日立製作所 光ビ−ム位置制御装置
JPS5694528A (en) * 1979-12-28 1981-07-31 Matsushita Electric Ind Co Ltd Drawing-in method of focus servo
US4307294A (en) * 1980-03-04 1981-12-22 Campbell Duncan B Electro-mechanical control means for space communication receiver
DE3019239A1 (de) * 1980-05-20 1981-11-26 SIEMENS AG AAAAA, 1000 Berlin und 8000 München Umhuellung fuer halbleiterbauelement
NL8003729A (nl) * 1980-06-27 1982-01-18 Philips Nv Inrichting voor optische scherpstelling.
JPS57120239A (en) * 1981-01-17 1982-07-27 Sharp Corp Focus servomechanism of optical information reader
JPS5877035A (ja) * 1981-10-08 1983-05-10 Mitsubishi Electric Corp 自動焦点引込み装置
JPS5885940A (ja) * 1981-11-17 1983-05-23 Hitachi Ltd 光デイスクの自動焦点引込み方法
JPS58101330U (ja) * 1981-12-25 1983-07-09 パイオニア株式会社 光学装置におけるフオ−カスサ−ボ引込装置
US4446546A (en) * 1981-12-31 1984-05-01 Magnetic Peripherals Inc. Focus initialization system for optical recording
JPS58121137A (ja) * 1982-01-09 1983-07-19 Sony Corp 光学式デイスク再生装置のフオ−カス引込み回路
JPS58155527A (ja) * 1982-03-10 1983-09-16 Hitachi Ltd 光デイスクプレ−ヤのフオ−カス引き込み回路
EP0096969B1 (fr) * 1982-05-19 1986-12-30 BURROUGHS CORPORATION (a Delaware corporation) Système de mémoire optique avec dispositif de commande de positionnement et de focalisation
EP0095852A1 (fr) * 1982-05-19 1983-12-07 BURROUGHS CORPORATION (a Michigan corporation) Dispositif de commande de focalisation d'un système de mémoire optique
US4669074A (en) * 1982-05-19 1987-05-26 Burroughs Corporation Focusing control circuitry for an optical memory system
US4674076A (en) * 1982-05-19 1987-06-16 Burroughs Corporation Optical memory system having improved positioning and focusing control circuitry
JPH0670855B2 (ja) * 1983-04-07 1994-09-07 三菱電機株式会社 光学式ディスクプレ−ヤ
JPS6077023U (ja) * 1983-11-01 1985-05-29 パイオニア株式会社 記録情報読取装置のフオ−カスレンズ移動制御装置
JPS60123763U (ja) * 1984-01-30 1985-08-21 パイオニア株式会社 記録情報再生装置
JPS61188745A (ja) * 1985-02-15 1986-08-22 Olympus Optical Co Ltd フオ−カスサ−ボ制御方式
KR900008608B1 (ko) * 1985-09-10 1990-11-26 미쯔비시덴끼 가부시끼가이샤 광학식 헤드 장치
DE3536700C3 (de) * 1985-10-15 1994-07-07 Focus Mestechnik Gmbh & Co Kg Gerät zum Ermitteln des lokalen Abstandes einer Prüffläche von einer Referenzfläche, deren geometrische Lage in bezug auf das Gerät bekannt ist
US4760269A (en) * 1986-05-20 1988-07-26 The Mitre Corporation Method and apparatus for measuring distance to an object
JPH01116926A (ja) * 1987-10-29 1989-05-09 Csk Corp 光メモリカードの書込装置
US4832575A (en) * 1988-01-11 1989-05-23 Spectra Physics Automatic test system for check valve closure in pump for liquid chromatography system
NL8803012A (nl) * 1988-12-08 1990-07-02 Philips Nv Optische aftastinrichting voorzien van een focusseerregelsysteem alsmede een geintegreerde schakeling voor toepassing in het focusseerregelsysteem.
JPH0643848Y2 (ja) * 1990-03-15 1994-11-14 松下電器産業株式会社 光集束位置制御装置
US20090310466A1 (en) * 2005-12-15 2009-12-17 Pioneer Corporation Objective lens driving device and driving method for the same

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2216077C3 (de) * 1972-04-01 1978-04-20 Loewe Opta Gmbh, 1000 Berlin Automatische Spurabtast-Regelschaltung für Video-Magnetband-Aufzeichnungsund Wiedergabegerät
FR2222665B1 (fr) * 1973-03-21 1975-10-31 Thomson Brandt
FR2251876B1 (fr) * 1973-11-16 1977-09-23 Thomson Brandt
US3932700A (en) * 1974-02-04 1976-01-13 Zenith Radio Corporation Focus tracking registration for optical reproducing systems
US3918071A (en) * 1974-04-11 1975-11-04 Fritz Albrecht Automatic lens focusing method and apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0020199A1 (fr) * 1979-05-31 1980-12-10 Thomson-Brandt Système de commande de changement de face lue pour un lecteur optique de support d'information
FR2458126A1 (fr) * 1979-05-31 1980-12-26 Thomson Brandt Systeme de commande de changement de face lue pour un lecteur optique de support d'information et lecteur optique comportant un tel systeme
WO1986005306A1 (fr) * 1985-03-09 1986-09-12 Deutsche Thomson-Brandt Gmbh Procede et conception de circuit pour la focalisation d'un faisceau lumineux sur un support d'enregistrement optique

Also Published As

Publication number Publication date
JPS5838855B2 (ja) 1983-08-25
CA1073254A (fr) 1980-03-11
JPS5257803A (en) 1977-05-12
DE2649688A1 (de) 1977-05-05
US4128847A (en) 1978-12-05
DE2649688C2 (de) 1984-04-05
FR2330062B1 (fr) 1979-07-06
GB1561541A (en) 1980-02-20

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