FR2356333A1 - Dispositif de focalisation automatique pour appareil optique de reproduction d'informations, notamment pour disque video - Google Patents

Dispositif de focalisation automatique pour appareil optique de reproduction d'informations, notamment pour disque video

Info

Publication number
FR2356333A1
FR2356333A1 FR7719366A FR7719366A FR2356333A1 FR 2356333 A1 FR2356333 A1 FR 2356333A1 FR 7719366 A FR7719366 A FR 7719366A FR 7719366 A FR7719366 A FR 7719366A FR 2356333 A1 FR2356333 A1 FR 2356333A1
Authority
FR
France
Prior art keywords
information reproducing
optical information
video disc
automatic focusing
focusing device
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
FR7719366A
Other languages
English (en)
Other versions
FR2356333B1 (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
Priority claimed from JP7435376A external-priority patent/JPS531003A/ja
Priority claimed from JP9400076A external-priority patent/JPS5319806A/ja
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Publication of FR2356333A1 publication Critical patent/FR2356333A1/fr
Application granted granted Critical
Publication of FR2356333B1 publication Critical patent/FR2356333B1/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
    • G11B7/002—Recording, reproducing or erasing systems characterised by the shape or form of the carrier
    • G11B7/0037—Recording, reproducing or erasing systems characterised by the shape or form of the carrier with discs
    • 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
    • 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
    • G11B7/095—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 specially adapted for discs, e.g. for compensation of eccentricity or wobble
    • G11B7/0953—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 specially adapted for discs, e.g. for compensation of eccentricity or wobble to compensate for eccentricity of the disc or disc tracks

Landscapes

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

Abstract

Appareil de reproduction des informations constitué par une source laser, un milieu d'enregistrement, un détecteur photosensible, un premier système optique qui oriente un faisceau laser depuis la source laser jusqu'à une piste d'informations du milieu d'enregistrement en formant un point de lecture, et par un second système optique qui oriente le faisceau réfléchi depuis la piste d'informations jusqu'au détecteur photosensible à travers un élément optique ayant les propriétés d'une lentille monodirectionnelle, cet élement optique et ce détecteur photosensible étant disposés respectivement de façon à déterminer un angle de 45 degrés environ par rapport à la direction de la piste d'informations.
FR7719366A 1976-06-25 1977-06-24 Dispositif de focalisation automatique pour appareil optique de reproduction d'informations, notamment pour disque video Granted FR2356333A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP7435376A JPS531003A (en) 1976-06-25 1976-06-25 Self-focusing system
JP9400076A JPS5319806A (en) 1976-08-09 1976-08-09 Information reproducer

Publications (2)

Publication Number Publication Date
FR2356333A1 true FR2356333A1 (fr) 1978-01-20
FR2356333B1 FR2356333B1 (fr) 1982-05-14

Family

ID=26415493

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7719366A Granted FR2356333A1 (fr) 1976-06-25 1977-06-24 Dispositif de focalisation automatique pour appareil optique de reproduction d'informations, notamment pour disque video

Country Status (5)

Country Link
US (1) US4293944A (fr)
DE (1) DE2728624C2 (fr)
FR (1) FR2356333A1 (fr)
GB (1) GB1532345A (fr)
NL (1) NL187716C (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2385171A1 (fr) * 1977-03-22 1978-10-20 Philips Nv Dispositif pour la lecture d'un porteur d'enregistrement reflechissant du rayonnement
FR2390749A1 (fr) * 1977-05-11 1978-12-08 Pioneer Electronic Corp Appareil d'asservissement de la focalisation d'un ensemble de lecture d'informations
FR2492144A1 (fr) * 1980-10-13 1982-04-16 Philips Nv Dispositif servant a la lecture et/ou l'enregistrement d'information dans une structure d'information lisible par voie optique
EP0137272A2 (fr) * 1983-09-05 1985-04-17 Mitsubishi Denki Kabushiki Kaisha Dispositif de focalisation automatique
EP0319033A2 (fr) * 1987-12-02 1989-06-07 Hitachi, Ltd. Méthode pour la détection des erreurs de mise-au-point utilisant des faisceaux de lumière ayant de l'astigmatisme et système pour le traitement de l'information optique utilisant une telle méthode.

Families Citing this family (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54133305A (en) * 1978-04-07 1979-10-17 Hitachi Ltd Information recorder
US4302830A (en) 1978-05-10 1981-11-24 Olympus Optical Company Ltd. Optical information reading-out apparatus
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
JPS5538639A (en) * 1978-09-07 1980-03-18 Pioneer Video Corp Servo drawing-in unit for focus lens of optical information reader
JPS6040093B2 (ja) * 1978-09-09 1985-09-09 パイオニアビデオ株式会社 トラッキングサ−ボ引込装置
JPS5690434A (en) * 1979-12-19 1981-07-22 Hitachi Ltd Optical information reproducing device
DE3002670C2 (de) * 1980-01-25 1984-08-16 Polygram Gmbh, 2000 Hamburg Anordnung zur Messung der horizontalen Verformung von Informationsträgern
JPS5744236A (en) * 1980-08-29 1982-03-12 Matsushita Electric Ind Co Ltd Optical information reproducer
JPS5766533A (en) * 1980-10-09 1982-04-22 Olympus Optical Co Ltd Optical information reader
JPS5774837A (en) * 1980-10-25 1982-05-11 Olympus Optical Co Ltd Signal detection system of optical information reproducing device
JPS57108811A (en) * 1980-12-26 1982-07-07 Hitachi Ltd Optical focus position detector
JPS57181436A (en) * 1981-05-01 1982-11-08 Toshiba Corp Optical disc device
NL8200208A (nl) * 1982-01-21 1983-08-16 Philips Nv Inrichting voor het uitlezen van een schijfvormige registratiedrager.
JPS58158039A (ja) * 1982-03-15 1983-09-20 Toshiba Corp 光ディスクの記録再生装置
DE3243069A1 (de) * 1982-11-22 1984-05-24 Sony Corp., Tokio/Tokyo Vorrichtung zum erfassen der position einer optischen abtasteinrichtung
JPS59116939A (ja) * 1982-12-23 1984-07-06 Olympus Optical Co Ltd 光学式記録再生装置
JPS59191144A (ja) * 1983-04-14 1984-10-30 Sony Corp 光ピツクアツプのトラツキングサ−ボ回路
JPS59221835A (ja) * 1983-05-31 1984-12-13 Sony Corp フオ−カス誤差検出装置
JPS6055521A (ja) * 1983-09-05 1985-03-30 Mitsubishi Electric Corp 光デイスクヘツドの自動焦点調節装置
NL8400674A (nl) * 1984-03-02 1985-10-01 Philips Nv Inrichting voor het inschrijven en/of uitlezen van informatie in een spoor van een reflekterende registratiedrager, met een fokusregeling met verminderde spot offsetgevoeligheid.
US4604739A (en) * 1984-04-16 1986-08-05 International Business Machines Corporation Optical focus detection employing rotated interference patterns
JP2565485B2 (ja) * 1984-09-14 1996-12-18 オリンパス光学工業株式会社 光学的記録再生装置
US4609813A (en) * 1985-03-18 1986-09-02 International Business Machines Corporation Optical systems employing ovate light beams
JPS61264521A (ja) * 1985-05-20 1986-11-22 Hitachi Ltd 光学式読取再生装置
JPS629537A (ja) * 1985-07-08 1987-01-17 Pioneer Electronic Corp 光学式ピツクアツプ装置
JPS62132242A (ja) * 1985-12-04 1987-06-15 Hitachi Ltd 光デイスク装置
JPH0777048B2 (ja) * 1987-06-26 1995-08-16 三菱電機株式会社 記録媒体駆動装置
US4879706A (en) * 1987-07-29 1989-11-07 Laser Magnetic Storage International Company Method and apparatus for focus and tracking in an optical disk system
JPH01204234A (ja) * 1988-02-08 1989-08-16 Canon Inc 光学的情報記録再生装置
US5272689A (en) * 1988-10-12 1993-12-21 Sanyo Electric Co., Ltd. Optical head system with transparent contact member
JPH03185633A (ja) * 1989-12-13 1991-08-13 Matsushita Electric Ind Co Ltd 光記録再生装置
US5235591A (en) * 1990-01-19 1993-08-10 Hitachi, Ltd. Stack type optical disc apparatus, sealed and separate type optical head therefor and optical disc medium
US5412634A (en) * 1990-02-16 1995-05-02 Deutsche Thomson-Brandt Gmbh Optical scanning device for a disc player including improved focusing apparatus
EP0465175B1 (fr) * 1990-06-29 1997-08-20 Kabushiki Kaisha Toshiba Tête optique
JP3019181B2 (ja) * 1993-12-27 2000-03-13 日本電気株式会社 光ヘッドのサーボ信号検出装置
US6071275A (en) * 1995-01-05 2000-06-06 Laser Industries, Ltd. Laser microscope adaptor apparatus
JP3617256B2 (ja) * 1997-06-20 2005-02-02 ソニー株式会社 光ピックアップ及び光ピックアップの製造方法
US11874144B2 (en) * 2020-07-28 2024-01-16 Li Lin Displacement measurement system

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2271590B1 (fr) * 1974-01-15 1978-12-01 Thomson Brandt
NL7413162A (nl) * 1974-10-07 1976-04-09 Philips Nv Inrichting voor het uitlezen van een schijf- vormige registratiedrager.
US4001494A (en) * 1974-11-01 1977-01-04 Zenith Radio Corporation Photoreceptor matrix for optical video playback system
NL182990C (nl) * 1975-07-07 1988-06-16 Philips Nv Inrichting voor het uitlezen van een stralingsreflekterende registratiedrager.
FR2323160A1 (fr) * 1975-09-03 1977-04-01 Thomson Brandt Dispositif optique de projection et lecteur optique comportant un tel dispositif
US4025949A (en) * 1975-12-31 1977-05-24 Zenith Radio Corporation Symmetrical astigmatic focus sensing system

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2385171A1 (fr) * 1977-03-22 1978-10-20 Philips Nv Dispositif pour la lecture d'un porteur d'enregistrement reflechissant du rayonnement
FR2390749A1 (fr) * 1977-05-11 1978-12-08 Pioneer Electronic Corp Appareil d'asservissement de la focalisation d'un ensemble de lecture d'informations
FR2492144A1 (fr) * 1980-10-13 1982-04-16 Philips Nv Dispositif servant a la lecture et/ou l'enregistrement d'information dans une structure d'information lisible par voie optique
EP0137272A2 (fr) * 1983-09-05 1985-04-17 Mitsubishi Denki Kabushiki Kaisha Dispositif de focalisation automatique
EP0137272A3 (en) * 1983-09-05 1987-08-05 Mitsubishi Denki Kabushiki Kaisha Automatic focusing device
EP0319033A2 (fr) * 1987-12-02 1989-06-07 Hitachi, Ltd. Méthode pour la détection des erreurs de mise-au-point utilisant des faisceaux de lumière ayant de l'astigmatisme et système pour le traitement de l'information optique utilisant une telle méthode.
EP0319033A3 (fr) * 1987-12-02 1991-06-12 Hitachi, Ltd. Méthode pour la détection des erreurs de mise-au-point utilisant des faisceaux de lumière ayant de l'astigmatisme et système pour le traitement de l'information optique utilisant une telle méthode.

Also Published As

Publication number Publication date
DE2728624C2 (de) 1981-10-01
GB1532345A (en) 1978-11-15
FR2356333B1 (fr) 1982-05-14
NL7707071A (nl) 1977-12-28
NL187716C (nl) 1991-12-16
US4293944A (en) 1981-10-06
DE2728624A1 (de) 1977-12-29
NL187716B (nl) 1991-07-16

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