JPS6460823A - Optical disk driving device - Google Patents

Optical disk driving device

Info

Publication number
JPS6460823A
JPS6460823A JP62218893A JP21889387A JPS6460823A JP S6460823 A JPS6460823 A JP S6460823A JP 62218893 A JP62218893 A JP 62218893A JP 21889387 A JP21889387 A JP 21889387A JP S6460823 A JPS6460823 A JP S6460823A
Authority
JP
Japan
Prior art keywords
compensation
circuit
emphasis
miniaturization
simplification
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
JP62218893A
Other languages
English (en)
Other versions
JPH0731820B2 (ja
Inventor
Osamu Ito
Shigeo Hayashi
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP62218893A priority Critical patent/JPH0731820B2/ja
Priority to US07/237,222 priority patent/US5073885A/en
Publication of JPS6460823A publication Critical patent/JPS6460823A/ja
Publication of JPH0731820B2 publication Critical patent/JPH0731820B2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G11B7/085—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
    • G11B7/08505—Methods for track change, selection or preliminary positioning by moving the head
    • 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

Landscapes

  • Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
  • Moving Of Head For Track Selection And Changing (AREA)
JP62218893A 1987-08-31 1987-08-31 光デイスク駆動装置 Expired - Lifetime JPH0731820B2 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP62218893A JPH0731820B2 (ja) 1987-08-31 1987-08-31 光デイスク駆動装置
US07/237,222 US5073885A (en) 1987-08-31 1988-08-26 Optical memory disc driving apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62218893A JPH0731820B2 (ja) 1987-08-31 1987-08-31 光デイスク駆動装置

Publications (2)

Publication Number Publication Date
JPS6460823A true JPS6460823A (en) 1989-03-07
JPH0731820B2 JPH0731820B2 (ja) 1995-04-10

Family

ID=16726956

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62218893A Expired - Lifetime JPH0731820B2 (ja) 1987-08-31 1987-08-31 光デイスク駆動装置

Country Status (2)

Country Link
US (1) US5073885A (ja)
JP (1) JPH0731820B2 (ja)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04184718A (ja) * 1990-11-20 1992-07-01 Sharp Corp 光ディスクおよび光ディスク装置
US5311490A (en) * 1990-12-19 1994-05-10 Sharp Kabushiki Kaisha Access controlling device for use in an optical disk drive
US5563858A (en) * 1993-10-19 1996-10-08 Sharp Kabushiki Kaisha Multi-beam recording-reproduction apparatus with improved positioning accuracy and track counting

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0453223B1 (en) * 1990-04-17 1997-09-10 Canon Kabushiki Kaisha Automatic loop gain control apparatus
US5199017A (en) * 1991-09-11 1993-03-30 International Business Machines Corporation Optical disk drive and method for counting the number of tracks on an optical disk
USRE36864E (en) * 1990-09-27 2000-09-12 International Business Machines Corporation Optical disk drive and methods for counting the number of tracks on an optical disk
JP2658561B2 (ja) * 1990-11-15 1997-09-30 日本電気株式会社 横断トラック数カウント回路
JP3536422B2 (ja) * 1995-04-28 2004-06-07 ソニー株式会社 デジタルサーボ回路
JP3633095B2 (ja) * 1996-04-22 2005-03-30 富士通株式会社 光学的記憶装置
CN1335992A (zh) 1999-02-22 2002-02-13 西加特技术有限责任公司 补偿可重复的偏心误差
WO2000068939A1 (en) 1999-05-07 2000-11-16 Seagate Technology Llc Repeatable runout compensation using iterative learning control in a disc storage system
KR20020025197A (ko) 1999-07-23 2002-04-03 추후 계획된 변수들을 가진 학습 알고리즘을 사용하는 반복되는런아웃 보상
US6952320B1 (en) 1999-12-16 2005-10-04 Seagate Technology Llc Virtual tracks for repeatable runout compensation
US8601217B2 (en) * 2010-08-31 2013-12-03 Oracle International Corporation Method and system for inserting cache blocks

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5841447A (ja) * 1981-09-04 1983-03-10 Hitachi Ltd 光スポット制御信号検出方法
JPS5965936A (ja) * 1982-10-05 1984-04-14 Matsushita Electric Ind Co Ltd 光学的記録再生信号の波形等化回路
JPS6010429A (ja) * 1983-06-30 1985-01-19 Toshiba Corp 光デイスク装置
JP2641421B2 (ja) * 1985-03-22 1997-08-13 株式会社日立製作所 光学的検出方法、光学的情報再生装置、及び信号検出回路
US4788421A (en) * 1985-05-15 1988-11-29 Mitsubishi Denki Kabushiki Kaisha Apparatus for controlling relative movement of an optical head to an optical disk with velocity detection
JPS61260474A (ja) * 1985-05-15 1986-11-18 Mitsubishi Electric Corp 光デイスク駆動装置
JPH0711870B2 (ja) * 1985-07-29 1995-02-08 株式会社日立製作所 光学的情報記録再生装置
DE3618137A1 (de) * 1985-05-31 1986-12-11 Hitachi, Ltd., Tokio/Tokyo Bildplatten-zugriffsverfahren und bildplattenspeicher
US4853913A (en) * 1985-06-17 1989-08-01 Kabushiki Kaisha Toshiba Pick-up control circuits for disc information reproducing apparatus
US4764860A (en) * 1985-06-26 1988-08-16 Nippon Gakki Seizo Kabushiki Kaisha Servo circuit for an information recording and/or reproducing apparatus
JPH067413B2 (ja) * 1985-07-03 1994-01-26 株式会社リコー 光ピツクアツプのトラツキング制御方式

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04184718A (ja) * 1990-11-20 1992-07-01 Sharp Corp 光ディスクおよび光ディスク装置
US5315567A (en) * 1990-11-20 1994-05-24 Sharp Kabushiki Kaisha Optical disk formatting system using index mark detecting circuit
US5311490A (en) * 1990-12-19 1994-05-10 Sharp Kabushiki Kaisha Access controlling device for use in an optical disk drive
US5563858A (en) * 1993-10-19 1996-10-08 Sharp Kabushiki Kaisha Multi-beam recording-reproduction apparatus with improved positioning accuracy and track counting

Also Published As

Publication number Publication date
US5073885A (en) 1991-12-17
JPH0731820B2 (ja) 1995-04-10

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