DE69021784D1 - Optisches Informationsaufzeichnungs-/Wiedergabegerät mit einer Mehrheit von Bemusterungskreisen. - Google Patents

Optisches Informationsaufzeichnungs-/Wiedergabegerät mit einer Mehrheit von Bemusterungskreisen.

Info

Publication number
DE69021784D1
DE69021784D1 DE69021784T DE69021784T DE69021784D1 DE 69021784 D1 DE69021784 D1 DE 69021784D1 DE 69021784 T DE69021784 T DE 69021784T DE 69021784 T DE69021784 T DE 69021784T DE 69021784 D1 DE69021784 D1 DE 69021784D1
Authority
DE
Germany
Prior art keywords
majority
information recording
playback device
optical information
pattern circles
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
DE69021784T
Other languages
English (en)
Other versions
DE69021784T2 (de
Inventor
Yasuo Ogino
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.)
Canon Inc
Original Assignee
Canon 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 Canon Inc filed Critical Canon Inc
Publication of DE69021784D1 publication Critical patent/DE69021784D1/de
Application granted granted Critical
Publication of DE69021784T2 publication Critical patent/DE69021784T2/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
    • G11B7/0948—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 detection and avoidance or compensation of imperfections on the carrier, e.g. dust, scratches, dropouts
DE69021784T 1989-06-12 1990-06-11 Optisches Informationsaufzeichnungs-/Wiedergabegerät mit einer Mehrheit von Bemusterungskreisen. Expired - Fee Related DE69021784T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1150059A JP2683104B2 (ja) 1989-06-12 1989-06-12 情報記録再生装置

Publications (2)

Publication Number Publication Date
DE69021784D1 true DE69021784D1 (de) 1995-09-28
DE69021784T2 DE69021784T2 (de) 1996-02-08

Family

ID=15488613

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69021784T Expired - Fee Related DE69021784T2 (de) 1989-06-12 1990-06-11 Optisches Informationsaufzeichnungs-/Wiedergabegerät mit einer Mehrheit von Bemusterungskreisen.

Country Status (4)

Country Link
US (1) US5235580A (de)
EP (1) EP0403196B1 (de)
JP (1) JP2683104B2 (de)
DE (1) DE69021784T2 (de)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4103974A1 (de) * 1991-02-09 1992-08-13 Thomson Brandt Gmbh Optisches aufzeichnungs- und/oder wiedergabegeraet
US5283775A (en) * 1992-12-14 1994-02-01 International Business Machines, Inc. Split detector system for direct read-while-write operation on magneto-optic media
US5835121A (en) * 1995-04-21 1998-11-10 Xerox Corporation Pixel exposure control for a raster output scanner in an electrophotographic printer
JP2001229617A (ja) 2000-02-16 2001-08-24 Mitsubishi Electric Corp 光ディスク用信号検出回路
KR20020008657A (ko) * 2000-07-25 2002-01-31 이계안 연료탱크내의 연료유동 및 비산방지장치
US7475135B2 (en) * 2005-03-31 2009-01-06 International Business Machines Corporation Systems and methods for event detection
US9372485B2 (en) 2011-11-02 2016-06-21 Smc Kabushiki Kaisha Flow rate control device
CN116915254A (zh) * 2023-09-14 2023-10-20 鹏元晟高科技股份有限公司 多路电压隔离采样电路

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60109034A (ja) * 1983-11-18 1985-06-14 Canon Inc 光デイスクの記録再生方法
KR870006556A (ko) * 1985-12-13 1987-07-13 미쓰다 가쓰시게 트랙킹서보 제어장치
JP2786181B2 (ja) * 1985-12-21 1998-08-13 ソニー株式会社 光ディスク装置
JP2796285B2 (ja) * 1986-07-11 1998-09-10 株式会社日立製作所 トラッキング方法及びそれを用いた光ディスク装置
JP2523555B2 (ja) * 1986-12-19 1996-08-14 株式会社日立製作所 光スポットの制御方法及び位置制御装置
US4860271A (en) * 1987-03-13 1989-08-22 Pioneer Electronic Corporation Servo circuit for generating a tracking error signal for optical disk player
US4982392A (en) * 1987-07-10 1991-01-01 Ricoh Company, Ltd. Stabilized optical pick-up device inhibiting the effect of the focus error signal at the start and end of a data region
JPS6437729A (en) * 1987-08-04 1989-02-08 Canon Kk Optical information recording and reproducing device
US4982393A (en) * 1987-08-31 1991-01-01 Canon Kabushiki Kaisha Information recording and/or reproducing apparatus provided with means for detecting abnormality of tracking servo
JP2585036B2 (ja) * 1987-12-25 1997-02-26 京セラ株式会社 光学式情報記録再生装置のトラッキングデフェクト解消方法

Also Published As

Publication number Publication date
EP0403196A3 (de) 1991-11-13
EP0403196A2 (de) 1990-12-19
JP2683104B2 (ja) 1997-11-26
EP0403196B1 (de) 1995-08-23
US5235580A (en) 1993-08-10
DE69021784T2 (de) 1996-02-08
JPH0316029A (ja) 1991-01-24

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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