DE69021338T2 - Servoeinheit für optische Scheibe. - Google Patents

Servoeinheit für optische Scheibe.

Info

Publication number
DE69021338T2
DE69021338T2 DE69021338T DE69021338T DE69021338T2 DE 69021338 T2 DE69021338 T2 DE 69021338T2 DE 69021338 T DE69021338 T DE 69021338T DE 69021338 T DE69021338 T DE 69021338T DE 69021338 T2 DE69021338 T2 DE 69021338T2
Authority
DE
Germany
Prior art keywords
optical disc
servo unit
servo
unit
disc
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 - Fee Related
Application number
DE69021338T
Other languages
English (en)
Other versions
DE69021338D1 (de
Inventor
Shinichiro Iimura
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.)
Sony Corp
Original Assignee
Sony 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 Sony Corp filed Critical Sony Corp
Publication of DE69021338D1 publication Critical patent/DE69021338D1/de
Application granted granted Critical
Publication of DE69021338T2 publication Critical patent/DE69021338T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • 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
    • 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
DE69021338T 1989-11-30 1990-11-15 Servoeinheit für optische Scheibe. Expired - Fee Related DE69021338T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1311722A JPH03173935A (ja) 1989-11-30 1989-11-30 光デイスクのサーボ装置

Publications (2)

Publication Number Publication Date
DE69021338D1 DE69021338D1 (de) 1995-09-07
DE69021338T2 true DE69021338T2 (de) 1996-01-25

Family

ID=18020687

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69021338T Expired - Fee Related DE69021338T2 (de) 1989-11-30 1990-11-15 Servoeinheit für optische Scheibe.

Country Status (6)

Country Link
US (1) US5347501A (de)
EP (1) EP0430497B1 (de)
JP (1) JPH03173935A (de)
KR (1) KR100202351B1 (de)
DE (1) DE69021338T2 (de)
MY (1) MY104528A (de)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0581685A (ja) * 1991-09-24 1993-04-02 Sony Corp 光学式デイスク装置
US5424881A (en) 1993-02-01 1995-06-13 Cirrus Logic, Inc. Synchronous read channel
US5425013A (en) * 1993-11-12 1995-06-13 International Business Machines Corporation Relative position sensing calibration for optical storage device
US5761164A (en) * 1993-11-15 1998-06-02 Pioneer Electronic Corporation Gain control device for servo control
US6606286B1 (en) * 1998-01-05 2003-08-12 Mitburri Electric Co., Ltd Tln signal generating apparatus used in optical disc drive and optical disc drive equipped with the apparatus, and optical disc drive equipped with amplitude adjusting apparatus for tracking error signal
CA2345788C (en) * 1999-07-30 2012-08-21 Matsushita Electric Industrial Co., Ltd. Objective lens inclinable to correct for a third-order coma aberration and an optical head device including the same
JP2002203324A (ja) * 2000-10-25 2002-07-19 Sony Computer Entertainment Inc フォーカス制御装置、フォーカス制御方法
TW566658U (en) * 2002-01-09 2003-12-11 Benq Corp Three-dimensionally adjustable laser detection device
TWI283403B (en) * 2002-02-19 2007-07-01 Via Tech Inc Focus control method and device
US7212482B2 (en) * 2002-11-29 2007-05-01 International Business Machines Corporation Apparatus and method to dynamically adjust the amplitude of a signal comprising information

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59154629A (ja) * 1983-02-23 1984-09-03 Victor Co Of Japan Ltd 回転デイスクの半径方向の記録再生位置の信号特性補償回路
JPS60138740A (ja) * 1983-12-27 1985-07-23 Sony Corp 光学式デイスクプレ−ヤ−のトラツキングサ−ボ回路
DE3690169C2 (de) * 1985-04-10 1990-10-04 Matsushita Electric Industrial Co., Ltd., Kadoma, Osaka, Jp
US4878211A (en) * 1986-05-26 1989-10-31 Pioneer Electronic Corporation Method and apparatus for correcting the loop gain of a servo loop in accordance with measurements during open-loop operation
JPS637571A (ja) * 1986-06-27 1988-01-13 Nec Corp 磁気デイスク装置
JPS63142531A (ja) * 1986-12-05 1988-06-14 Sony Corp 光デイスク情報記録再生装置のサ−ボ回路
JP2625476B2 (ja) * 1988-03-02 1997-07-02 キヤノン株式会社 光学的記録再生装置
US4942564A (en) * 1988-10-31 1990-07-17 Hewlett-Packard Company Servo system gain compensation method for magneto-optic disk drives
US5251194A (en) * 1989-04-17 1993-10-05 Mitsubishi Denki Kabushiki Kaisha Techniques for controlling beam position and focus in optical disk drives

Also Published As

Publication number Publication date
KR910010417A (ko) 1991-06-29
EP0430497A3 (en) 1992-02-19
US5347501A (en) 1994-09-13
DE69021338D1 (de) 1995-09-07
JPH03173935A (ja) 1991-07-29
EP0430497B1 (de) 1995-08-02
KR100202351B1 (ko) 1999-06-15
EP0430497A2 (de) 1991-06-05
MY104528A (en) 1994-04-30

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee