DE602007005191D1 - Fokusservogerät - Google Patents

Fokusservogerät

Info

Publication number
DE602007005191D1
DE602007005191D1 DE602007005191T DE602007005191T DE602007005191D1 DE 602007005191 D1 DE602007005191 D1 DE 602007005191D1 DE 602007005191 T DE602007005191 T DE 602007005191T DE 602007005191 T DE602007005191 T DE 602007005191T DE 602007005191 D1 DE602007005191 D1 DE 602007005191D1
Authority
DE
Germany
Prior art keywords
focus servo
servo device
focus
servo
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.)
Active
Application number
DE602007005191T
Other languages
English (en)
Inventor
Jin Yoneda
Akira Yoshida
Hideaki Sekiya
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.)
Sanyo Electric Co Ltd
System Solutions Co Ltd
Original Assignee
Sanyo Electric Co Ltd
Sanyo Semiconductor Co 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
Application filed by Sanyo Electric Co Ltd, Sanyo Semiconductor Co Ltd filed Critical Sanyo Electric Co Ltd
Publication of DE602007005191D1 publication Critical patent/DE602007005191D1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • 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
    • G11B7/08511—Methods for track change, selection or preliminary positioning by moving the head with focus pull-in only
    • 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
    • G11B7/0945—Methods for initialising servos, start-up sequences
DE602007005191T 2006-08-08 2007-08-08 Fokusservogerät Active DE602007005191D1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2006216151A JP4806309B2 (ja) 2006-08-08 2006-08-08 フォーカスサーボ装置

Publications (1)

Publication Number Publication Date
DE602007005191D1 true DE602007005191D1 (de) 2010-04-22

Family

ID=38614625

Family Applications (1)

Application Number Title Priority Date Filing Date
DE602007005191T Active DE602007005191D1 (de) 2006-08-08 2007-08-08 Fokusservogerät

Country Status (6)

Country Link
US (1) US7894311B2 (de)
EP (1) EP1887571B1 (de)
JP (1) JP4806309B2 (de)
KR (1) KR100882416B1 (de)
CN (1) CN101123096A (de)
DE (1) DE602007005191D1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8553515B2 (en) * 2010-11-30 2013-10-08 General Electric Company System and method for precise servoing

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0463068A1 (de) 1989-03-17 1992-01-02 Optical Recording Corporation Optisches aufzeichnungs- und/oder wiedergabegerät
JPH0555310A (ja) 1991-08-29 1993-03-05 Nec Kansai Ltd インナリードボンデイング方法及びその装置
JPH07129968A (ja) * 1993-09-07 1995-05-19 Matsushita Electric Ind Co Ltd フォーカス制御方法および制御装置
JP3476112B2 (ja) 1995-10-18 2003-12-10 ソニー株式会社 フォーカスサーボ装置
JPH09237424A (ja) * 1995-12-26 1997-09-09 Pioneer Electron Corp フォーカスエラー信号のバイアス量制御装置
DE60209756T2 (de) * 2001-10-01 2006-11-30 Pioneer Corp. Abspielgerät für optische scheibe mit fokuseinziehfunktion
US7054240B2 (en) * 2002-03-04 2006-05-30 Zoran Corporation Method and apparatus for providing focus control on a multi layer disc
KR20040014043A (ko) * 2002-08-09 2004-02-14 삼성전자주식회사 광 디스크의 트래킹 에러 신호 크기를 이용한 포커스 서보보상 장치 및 방법
KR20040031533A (ko) * 2002-10-07 2004-04-13 삼성전자주식회사 적응적인 포커싱 방법 및 장치
JP2006059470A (ja) * 2004-08-20 2006-03-02 Sony Corp データ記録再生装置及びフォーカスバイアス設定方法
KR100717043B1 (ko) 2005-10-17 2007-05-10 삼성전자주식회사 포커스 인입 제어 장치 및 포커스 인입 제어 방법

Also Published As

Publication number Publication date
CN101123096A (zh) 2008-02-13
KR100882416B1 (ko) 2009-02-05
JP4806309B2 (ja) 2011-11-02
US7894311B2 (en) 2011-02-22
EP1887571B1 (de) 2010-03-10
US20080037381A1 (en) 2008-02-14
KR20080013786A (ko) 2008-02-13
EP1887571A1 (de) 2008-02-13
JP2008041201A (ja) 2008-02-21

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition