FR2394106A1 - Transducteur optique et systeme de mise au point d'objectif, notamment pour video-disques - Google Patents

Transducteur optique et systeme de mise au point d'objectif, notamment pour video-disques

Info

Publication number
FR2394106A1
FR2394106A1 FR787816732A FR7816732A FR2394106A1 FR 2394106 A1 FR2394106 A1 FR 2394106A1 FR 787816732 A FR787816732 A FR 787816732A FR 7816732 A FR7816732 A FR 7816732A FR 2394106 A1 FR2394106 A1 FR 2394106A1
Authority
FR
France
Prior art keywords
focusing system
lens focusing
video discs
optical transducer
objective
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
FR787816732A
Other languages
English (en)
Other versions
FR2394106B1 (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.)
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 FR2394106A1 publication Critical patent/FR2394106A1/fr
Application granted granted Critical
Publication of FR2394106B1 publication Critical patent/FR2394106B1/fr
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
    • G11B7/08—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
    • G11B7/0912—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 push-pull method

Abstract

L'invention concerne un système de mise au point d'objectif. Selon l'invention, il comprend une source 16 d'un faisceau de rayonnement 17 à focaliser et réfléchir sur une surface 14; un objectif 20; un moyen de focalisation; un moyen transducteur 24 comprenant deux détecteurs 25, 25' isolés l'un de l'autre et produisant chacun un signal électrique; et un moyen de commande 30 pour comparer les deux signaux, avec un moyen 32 pour déplacer l'objectif pour mettre le faisceau au point sur la surface. L'invention s'applique notamment à la restitution de vidéodisques.
FR7816732A 1977-06-06 1978-06-05 Transducteur optique et systeme de mise au point d'objectif, notamment pour video-disques Expired FR2394106B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US80398677A 1977-06-06 1977-06-06

Publications (2)

Publication Number Publication Date
FR2394106A1 true FR2394106A1 (fr) 1979-01-05
FR2394106B1 FR2394106B1 (fr) 1985-07-19

Family

ID=25187910

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7816732A Expired FR2394106B1 (fr) 1977-06-06 1978-06-05 Transducteur optique et systeme de mise au point d'objectif, notamment pour video-disques

Country Status (10)

Country Link
US (1) US4152586A (fr)
JP (1) JPS544105A (fr)
BE (1) BE867877A (fr)
CA (1) CA1120152A (fr)
DE (1) DE2824778C2 (fr)
FR (1) FR2394106B1 (fr)
GB (1) GB1603596A (fr)
HK (1) HK42186A (fr)
IT (1) IT1095296B (fr)
NL (1) NL7806068A (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2459991A1 (fr) * 1979-06-25 1981-01-16 Olympus Optical Co Procede et dispositif de detection d'un signal d'erreur de focalisation
EP0080340A1 (fr) * 1981-11-19 1983-06-01 Olympus Optical Co., Ltd. Dispositif pour la détection de l'état de focalisation d'un système optique
FR2518767A1 (fr) * 1981-12-17 1983-06-24 Centre Nat Etd Spatiales Procede de reglage automatique de la nettete d'images projetees sur un ecran et dispositifs pour la mise en oeuvre dudit procede
EP0148278A1 (fr) * 1983-07-06 1985-07-17 Matsushita Electric Industrial Co., Ltd. Photo-capteur
EP0216495A2 (fr) * 1985-08-30 1987-04-01 Canon Kabushiki Kaisha Dispositif de détection de signal d'erreur
EP0233590A1 (fr) * 1986-02-13 1987-08-26 Csk Corporation Procédé et dispositif de détection de focalisation

Families Citing this family (42)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4371899A (en) * 1978-03-27 1983-02-01 Discovision Associates Time base error correction system for player
US4370679A (en) * 1978-03-27 1983-01-25 Discovision Associates Gain correction system for videodisc player apparatus
US4358796A (en) * 1978-03-27 1982-11-09 Discovision Associates Spindle servo system for videodisc player
US4226541A (en) * 1978-08-11 1980-10-07 Tisue James G Method and apparatus for suppressing the effects of surface light scatter in optical reflective scanning system
JPS5727444A (en) * 1980-07-25 1982-02-13 Olympus Optical Co Ltd Focus detector
US4467467A (en) * 1980-10-20 1984-08-21 Discovision Associates Video recorder-playback machine
US4488279A (en) * 1980-10-20 1984-12-11 Discovision Associates Video recorder-playback machine
US4354102A (en) * 1980-11-13 1982-10-12 The United States Of America As Represented By The Secretary Of The Air Force Cursor apparatus for interactive graphic display system
US4376303A (en) * 1980-12-19 1983-03-08 Rca Corporation Quasi-zoom lens optical focus sensor
US4381557A (en) * 1980-12-19 1983-04-26 Rca Corporation Optical focus sensor
US4458144A (en) * 1981-06-30 1984-07-03 Storage Technology Corporation Apparatus for reading information stored in a track pattern on a radiation reflecting record
US4534021A (en) * 1981-12-10 1985-08-06 Discovision Associates Angularly multiplexed optical recording medium
US4556787A (en) * 1982-03-23 1985-12-03 Olympus Optical Co., Ltd. Photosensor for optical observing or photographing devices
US4511248A (en) * 1982-06-30 1985-04-16 Eastman Kodak Company Active electro-optical distance detection methods and devices
US4622659A (en) * 1982-09-09 1986-11-11 Burroughs Corporation Focus detection and control apparatus for maintaining accurate focusing in an optical memory system by detecting reflected beam diameter variations at spaced predetermined locations
US4621353A (en) * 1982-09-09 1986-11-04 Burroughs Corporation Optical memory system providing improved focusing control and improved beam combining and separating apparatus
US4559622A (en) * 1982-09-09 1985-12-17 Burroughs Corporation Optical memory system providing improved focus detection and control by detecting reflected beam diameter variations at spaced predetermined locations in the system
US4501493A (en) * 1982-10-28 1985-02-26 Sony Corporation Apparatus for detecting a position of an optical pickup
NL8300291A (nl) * 1983-01-27 1984-08-16 Philips Nv Inrichting voor het uitlezen van een optische registratiedrager.
JPS59125727U (ja) * 1983-02-15 1984-08-24 パイオニア株式会社 光学式情報ピツクアツプ装置
JPS59162514A (ja) * 1983-03-08 1984-09-13 Dainippon Screen Mfg Co Ltd 画像走査記録装置における焦点調整方法
US4654515A (en) * 1983-05-28 1987-03-31 Kabushiki Kaisha Toshiba Optical head for focussing a light beam on an information recording medium
US4705941A (en) * 1983-06-30 1987-11-10 Kabushiki Kaisha Toshiba Apparatus for detecting a focusing state of an optical system
DE3333830C2 (de) * 1983-09-20 1985-08-01 Ralf 6751 Katzweiler Hinkel Verfahren zur Laserentfernungsmessung mit hoher Auflösung für den Nahbereich
JPS60185230A (ja) * 1984-03-02 1985-09-20 Pioneer Electronic Corp 焦点誤差検出装置
JPS618744A (ja) * 1984-06-22 1986-01-16 Fuji Photo Film Co Ltd 光デイスク装置のフオ−カス誤差検出装置
US4798469A (en) * 1985-10-02 1989-01-17 Burke Victor B Noncontact gage system utilizing reflected light
GB8621810D0 (en) * 1986-09-10 1986-10-15 Whitehouse J C Rangefinder for robotic applications
JPS63176929U (fr) * 1987-03-26 1988-11-16
JPS63257925A (ja) * 1987-04-15 1988-10-25 Nippon Coinco:Kk 光ヘツドの焦点制御信号検出装置
JP2887273B2 (ja) * 1987-05-22 1999-04-26 パイオニア株式会社 光学式ピックアップ装置
US4843603A (en) * 1988-03-11 1989-06-27 Optotech, Inc. Concentric photodetector arrangement for focusing and tracking
US4958245A (en) * 1988-04-07 1990-09-18 Insite Peripherals, Inc. Apparatus and method for optical servo control with media having information storage and servo control regions of different reflectivities
US5195081A (en) * 1988-04-22 1993-03-16 Canon Kabushiki Kaisha Optical apparatus for effecting recording and/or reproducing of information on/from and optical information recording medium
US5157249A (en) * 1991-02-19 1992-10-20 Olympus Optical Co., Ltd. Miniaturized optical pick-up with high sensitivity focusing error detecting device
US5663554A (en) * 1995-01-17 1997-09-02 Agfa Division, Bayer Corporation Weak lens focus adjusting mechanism based upon thickness of scanned material and imagesetter using same
US5978329A (en) * 1995-06-07 1999-11-02 Discovision Associates Technique for closed loop servo operation in optical disc tracking control
KR100200857B1 (ko) * 1995-10-04 1999-06-15 윤종용 광픽업장치
ATE201277T1 (de) 1995-12-06 2001-06-15 Discovision Ass Gerät und verfahren zum regeln der fokussierung
US5689485A (en) * 1996-04-01 1997-11-18 Discovision Associates Tracking control apparatus and method
GB2355354A (en) * 1999-08-03 2001-04-18 Axon Instr Inc Auto-focus method
US7936659B2 (en) * 2002-07-03 2011-05-03 Discovision Associates Method and apparatus for micro optical recording and playback tracking control

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3454772A (en) * 1966-12-20 1969-07-08 Hughes Aircraft Co Photoelectric monitoring system for holding the object plane in proper focus
US3596101A (en) * 1969-11-05 1971-07-27 Canon Kk Optical systems for automatic focusing apparatus
US3890499A (en) * 1970-05-15 1975-06-17 Us Army Differential scanner system
DE2102922C3 (de) * 1971-01-22 1978-08-24 Ernst Leitz Wetzlar Gmbh, 6330 Wetzlar Anordnung zum selbsttätigen Fokussieren auf in optischen Geräten zu betrachtende Objekte
US3757124A (en) * 1971-08-13 1973-09-04 P Kaestner Optical apparatus for focusing an image
AR205243A1 (es) * 1972-05-11 1976-04-21 Philips Nv Aparato para la lectura de un portador de grabacion reflector plano
DE2453364C3 (de) * 1973-11-09 1979-02-22 Hitachi, Ltd., Tokio Automatische Fokussiervorrichtung
JPS5091317A (fr) * 1973-12-12 1975-07-22
US3997715A (en) * 1974-03-25 1976-12-14 Mca Disco-Vision, Inc. Focusing system for videodisc player
NL182257C (nl) * 1974-12-23 1988-02-01 Philips Nv Inrichting voor het uitlezen van een vlakke reflekterende registratiedrager waarop informatie is aangebracht in een optisch uitleesbare struktuur.

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2459991A1 (fr) * 1979-06-25 1981-01-16 Olympus Optical Co Procede et dispositif de detection d'un signal d'erreur de focalisation
EP0080340A1 (fr) * 1981-11-19 1983-06-01 Olympus Optical Co., Ltd. Dispositif pour la détection de l'état de focalisation d'un système optique
FR2518767A1 (fr) * 1981-12-17 1983-06-24 Centre Nat Etd Spatiales Procede de reglage automatique de la nettete d'images projetees sur un ecran et dispositifs pour la mise en oeuvre dudit procede
EP0083268A1 (fr) * 1981-12-17 1983-07-06 Centre National D'etudes Spatiales Procédé de réglage automatique de la netteté d'images projetées sur un écran et dispositifs pour la mise en oeuvre dudit procédé
EP0148278A1 (fr) * 1983-07-06 1985-07-17 Matsushita Electric Industrial Co., Ltd. Photo-capteur
EP0148278A4 (fr) * 1983-07-06 1987-02-03 Matsushita Electric Ind Co Ltd Photo-capteur.
US4868821A (en) * 1983-07-06 1989-09-19 Matsushita Electric Industrial Co., Ltd. Optical pickup which includes a single objective lens having magnification equal to or greater than 3 and equal to or smaller than 5
EP0216495A2 (fr) * 1985-08-30 1987-04-01 Canon Kabushiki Kaisha Dispositif de détection de signal d'erreur
EP0216495A3 (en) * 1985-08-30 1987-12-23 Canon Kabushiki Kaisha Error signal detecting device
US4783590A (en) * 1985-08-30 1988-11-08 Canon Kabushiki Kaisha Error signal producing device having improved linearity
EP0233590A1 (fr) * 1986-02-13 1987-08-26 Csk Corporation Procédé et dispositif de détection de focalisation

Also Published As

Publication number Publication date
IT1095296B (it) 1985-08-10
HK42186A (en) 1986-06-13
DE2824778C2 (de) 1982-07-22
GB1603596A (en) 1981-11-25
JPS544105A (en) 1979-01-12
US4152586A (en) 1979-05-01
FR2394106B1 (fr) 1985-07-19
IT7824247A0 (it) 1978-06-06
NL7806068A (nl) 1978-12-08
BE867877A (fr) 1978-12-06
CA1120152A (fr) 1982-03-16
DE2824778A1 (de) 1979-01-04

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Legal Events

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CD Change of name or company name
TP Transmission of property
ST Notification of lapse