GB2090437B - Focus servo device in an optical pickup system - Google Patents

Focus servo device in an optical pickup system

Info

Publication number
GB2090437B
GB2090437B GB8138973A GB8138973A GB2090437B GB 2090437 B GB2090437 B GB 2090437B GB 8138973 A GB8138973 A GB 8138973A GB 8138973 A GB8138973 A GB 8138973A GB 2090437 B GB2090437 B GB 2090437B
Authority
GB
United Kingdom
Prior art keywords
optical pickup
focus servo
servo device
pickup system
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.)
Expired
Application number
GB8138973A
Other languages
English (en)
Other versions
GB2090437A (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.)
Universal Pioneer Corp
Original Assignee
Universal Pioneer Corp
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 Universal Pioneer Corp filed Critical Universal Pioneer Corp
Publication of GB2090437A publication Critical patent/GB2090437A/en
Application granted granted Critical
Publication of GB2090437B publication Critical patent/GB2090437B/en
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
    • G11B7/0941—Methods and circuits for servo gain or phase compensation during operation
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/40—Optical focusing aids
    • 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

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Automatic Focus Adjustment (AREA)
GB8138973A 1980-12-29 1981-12-24 Focus servo device in an optical pickup system Expired GB2090437B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55188178A JPS57113428A (en) 1980-12-29 1980-12-29 Focus servo device

Publications (2)

Publication Number Publication Date
GB2090437A GB2090437A (en) 1982-07-07
GB2090437B true GB2090437B (en) 1984-09-26

Family

ID=16219125

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8138973A Expired GB2090437B (en) 1980-12-29 1981-12-24 Focus servo device in an optical pickup system

Country Status (4)

Country Link
US (1) US4475182A (US06277897-20010821-C00009.png)
JP (1) JPS57113428A (US06277897-20010821-C00009.png)
DE (1) DE3151834C2 (US06277897-20010821-C00009.png)
GB (1) GB2090437B (US06277897-20010821-C00009.png)

Families Citing this family (52)

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JPS57186239A (en) * 1981-05-11 1982-11-16 Sony Corp Disc reproducing device
JPS58128031A (ja) * 1982-01-24 1983-07-30 Sony Corp デイスク再生装置
JPS58200473A (ja) * 1982-05-19 1983-11-22 Pioneer Video Kk 情報読取装置
EP0095766B1 (en) * 1982-05-31 1986-10-22 Hitachi, Ltd. Servo circuit for a signal reproducing apparatus
JPH0677326B2 (ja) * 1982-07-24 1994-09-28 パイオニア株式会社 情報読取装置のフォ−カスサ−ボ装置
JPS5938936A (ja) * 1982-08-28 1984-03-03 Sony Corp 情報再生装置のサ−ボコントロ−ル回路
DE3340712A1 (de) * 1982-11-11 1984-05-17 Sony Corp., Tokio/Tokyo Spurhalteschaltung fuer optische wiedergabegeraete
EP0116753B1 (en) * 1982-12-07 1987-06-24 Secretary of State for Trade and Industry in Her Britannic Majesty's Gov. of the U.K. of Great Britain and Northern Ireland Improvements in or relating to apparatus to focus light on a surface
JPS59116942A (ja) * 1982-12-23 1984-07-06 Olympus Optical Co Ltd オ−トフォ−カス装置
JPS59116939A (ja) * 1982-12-23 1984-07-06 Olympus Optical Co Ltd 光学式記録再生装置
JPS6074129A (ja) * 1983-09-30 1985-04-26 Sony Corp 光学式デイスクのトラツキングサ−ボ回路
JPS6095733A (ja) * 1983-10-31 1985-05-29 Hitachi Ltd 光学的信号処理装置
JPH0734287B2 (ja) * 1984-05-08 1995-04-12 ソニー株式会社 光学式ディスク装置の起動制御方法
DE3471529D1 (en) * 1984-06-18 1988-06-30 Hell Rudolf Dr Ing Gmbh Method and appliance for the acoustic control of the adjustment of optical devices
EP0165325B1 (de) * 1984-06-18 1988-08-24 DR.-ING. RUDOLF HELL GmbH Verfahren und Einrichtung zur akustischen Kontrolle von Justiervorgängen an optischen Vorrichtungen
DE3473517D1 (en) * 1984-06-18 1988-09-22 Hell Rudolf Dr Ing Gmbh Method and appliance for the acoustic control of the adjustment of optical devices
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
JPS61117737A (ja) * 1984-11-13 1986-06-05 Pioneer Electronic Corp フオ−カスサ−ボ装置
DE3572070D1 (en) * 1984-12-19 1989-09-07 Toshiba Kk Tracking control system for optical record disc information reproducing apparatus
NL8500059A (nl) * 1985-01-11 1986-08-01 Philips Nv Inrichting voor het weergeven van informatie van een optisch uitleesbare registratiedrager.
JPS61177642A (ja) * 1985-01-31 1986-08-09 Olympus Optical Co Ltd 光学的情報記録再生装置
JPS61177647A (ja) * 1985-02-04 1986-08-09 インタ−ナショナル　ビジネス　マシ−ンズ　コ−ポレ−ション 情報記憶装置
US4899327A (en) * 1985-02-04 1990-02-06 International Business Machines Corporation Focus servo loop correction
DE3503983A1 (de) * 1985-02-06 1986-08-07 Deutsche Thomson-Brandt Gmbh, 7730 Villingen-Schwenningen Fokus-regelung fuer ein geraet fuer plattenfoermige, rotierende informationstraeger
JPH0736233B2 (ja) * 1985-04-16 1995-04-19 オリンパス光学工業株式会社 光学的情報記録再生装置
JPS61264521A (ja) * 1985-05-20 1986-11-22 Hitachi Ltd 光学式読取再生装置
US4764860A (en) * 1985-06-26 1988-08-16 Nippon Gakki Seizo Kabushiki Kaisha Servo circuit for an information recording and/or reproducing apparatus
US4701603A (en) * 1985-10-17 1987-10-20 Optical Disc Corporation Focus control system for optical information recorder or player
JPH056575Y2 (US06277897-20010821-C00009.png) * 1986-04-18 1993-02-19
US4695722A (en) * 1986-04-25 1987-09-22 Ford Aerospace & Communications Corporation Optical scanner error compensator
EP0247829A1 (en) * 1986-05-26 1987-12-02 Pioneer Electronic Corporation Method and apparatus for correcting loop gain of a fine adjustment servo loop
JPS63228421A (ja) * 1987-03-17 1988-09-22 Minolta Camera Co Ltd 自動合焦装置
JPH0777048B2 (ja) * 1987-06-26 1995-08-16 三菱電機株式会社 記録媒体駆動装置
US4972075A (en) * 1988-08-02 1990-11-20 Minolta Camera Kabushiki Kaisha Automatic focusing system with dual diffraction gratings and converging means
US5062094A (en) * 1988-11-07 1991-10-29 Minolta Camera Kabushiki Kaisha Optical head for optical disk system
US5166916A (en) * 1988-12-14 1992-11-24 Asahi Kogaku Kogyo Kabushiki Kaisha Automatic gain control apparatus
JPH03263620A (ja) * 1990-03-13 1991-11-25 Pioneer Electron Corp ディスクプレーヤのサーボ装置
JPH0827962B2 (ja) * 1990-06-27 1996-03-21 パイオニア株式会社 光ピックアップ
GB2248989B (en) * 1990-10-15 1995-05-24 Applied Magnetics Corp Focus sensing apparatus and method
US5245174A (en) * 1990-10-15 1993-09-14 Applied Magnetics Corporation Focus sensing apparatus utilizing a reflecting surface having variable reflectivity
US5347502A (en) * 1991-11-08 1994-09-13 Matsushita Electric Industrial Co., Ltd. Focusing control system for use in an information recording and reproducing apparatus
KR100230228B1 (ko) * 1993-07-31 1999-11-15 윤종용 광디스크 시스템의 포커싱 제어장치
US5436880A (en) * 1994-01-10 1995-07-25 Eastman Kodak Company Laser power control in an optical recording system using partial correction of reflected signal error
JPH08180429A (ja) * 1994-12-22 1996-07-12 Sharp Corp 光情報記録再生装置及び光記録媒体
JP3553241B2 (ja) * 1995-11-24 2004-08-11 シャープ株式会社 光ディスク装置
DE19640870A1 (de) * 1996-10-04 1998-04-09 Thomson Brandt Gmbh Aufzeichnungs- oder Wiedergabegerät für optische Informationsträger mit einem Servo-Regelkreis und Verfahren zur Fehlersignalbehandlung in einem solchen
US5897798A (en) * 1997-06-04 1999-04-27 Hmt Technology Corporation Laser texturing apparatus employing a rotating mirror
JP2005203057A (ja) * 2004-01-19 2005-07-28 Funai Electric Co Ltd 光ディスク記録再生装置
JP2007536691A (ja) * 2004-05-04 2007-12-13 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ レール摩擦キャリブレーション
KR100604014B1 (ko) 2004-06-21 2006-07-24 엘지전자 주식회사 홀로그래픽 데이터 저장 시스템
US7869022B2 (en) * 2007-07-18 2011-01-11 Asml Netherlands B.V. Inspection method and apparatus lithographic apparatus, lithographic processing cell, device manufacturing method and distance measuring system
KR101286634B1 (ko) * 2012-01-13 2013-07-22 도시바삼성스토리지테크놀러지코리아 주식회사 광 검출 소자 및 이를 적용하는 광 픽업 장치 및 광 디스크 드라이브

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7315419A (nl) * 1973-11-10 1975-05-13 Philips Nv Inrichting voor het uitlezen van een schijfvor- mige registratiedrager.
NL7401805A (nl) * 1974-02-09 1975-08-12 Philips Nv Inrichting voor het instellen van het beeld en informatiestruktuur op een omzetter.
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.
JPS5538369A (en) * 1978-09-01 1980-03-17 Texaco Development Corp Manufacture of carboxylic acids and their esters
JPS5538639A (en) * 1978-09-07 1980-03-18 Pioneer Video Corp Servo drawing-in unit for focus lens of optical information reader
JPS5694528A (en) * 1979-12-28 1981-07-31 Matsushita Electric Ind Co Ltd Drawing-in method of focus servo

Also Published As

Publication number Publication date
JPS57113428A (en) 1982-07-14
DE3151834C2 (de) 1985-03-07
DE3151834A1 (de) 1982-08-12
GB2090437A (en) 1982-07-07
JPS6244330B2 (US06277897-20010821-C00009.png) 1987-09-19
US4475182A (en) 1984-10-02

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Legal Events

Date Code Title Description
746 Register noted 'licences of right' (sect. 46/1977)
PE20 Patent expired after termination of 20 years

Effective date: 20011223