TW200641845A - Focusing servo device, optical disc recording/reproducing device and focus-searching method - Google Patents

Focusing servo device, optical disc recording/reproducing device and focus-searching method

Info

Publication number
TW200641845A
TW200641845A TW094116442A TW94116442A TW200641845A TW 200641845 A TW200641845 A TW 200641845A TW 094116442 A TW094116442 A TW 094116442A TW 94116442 A TW94116442 A TW 94116442A TW 200641845 A TW200641845 A TW 200641845A
Authority
TW
Taiwan
Prior art keywords
focus
energy
optical disc
reproducing device
disc recording
Prior art date
Application number
TW094116442A
Other languages
English (en)
Other versions
TWI277078B (en
Inventor
Chun-Nan Liu
Shih-Hsien Liu
Original Assignee
Sunplus Technology 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 Sunplus Technology Co Ltd filed Critical Sunplus Technology Co Ltd
Priority to TW094116442A priority Critical patent/TWI277078B/zh
Priority to US11/198,826 priority patent/US8009522B2/en
Publication of TW200641845A publication Critical patent/TW200641845A/zh
Application granted granted Critical
Publication of TWI277078B publication Critical patent/TWI277078B/zh

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
    • 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
    • G11B7/095—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 discs, e.g. for compensation of eccentricity or wobble
    • G11B7/0956—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 discs, e.g. for compensation of eccentricity or wobble to compensate for tilt, skew, warp or inclination of the disc, i.e. maintain the optical axis at right angles to the disc

Landscapes

  • Optical Recording Or Reproduction (AREA)
  • Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
TW094116442A 2005-05-20 2005-05-20 Focusing servo device, optical disc recording/reproducing device and focus-searching method TWI277078B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
TW094116442A TWI277078B (en) 2005-05-20 2005-05-20 Focusing servo device, optical disc recording/reproducing device and focus-searching method
US11/198,826 US8009522B2 (en) 2005-05-20 2005-08-04 Focusing servo device, optical disc recording/reproducing device and focus-searching method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW094116442A TWI277078B (en) 2005-05-20 2005-05-20 Focusing servo device, optical disc recording/reproducing device and focus-searching method

Publications (2)

Publication Number Publication Date
TW200641845A true TW200641845A (en) 2006-12-01
TWI277078B TWI277078B (en) 2007-03-21

Family

ID=37448194

Family Applications (1)

Application Number Title Priority Date Filing Date
TW094116442A TWI277078B (en) 2005-05-20 2005-05-20 Focusing servo device, optical disc recording/reproducing device and focus-searching method

Country Status (2)

Country Link
US (1) US8009522B2 (zh)
TW (1) TWI277078B (zh)

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW222628B (zh) 1991-11-29 1994-04-21 Nippon Catalytic Chem Ind
US5432771A (en) * 1992-05-13 1995-07-11 Canon Kabushiki Kaisha Information recording/reproducing apparatus for performing recording/reproduction of information by using probe
JPH05325210A (ja) * 1992-05-26 1993-12-10 Pioneer Electron Corp トラックジャンプ制御装置
MY131558A (en) * 1993-04-02 2007-08-30 Sony Corp Focusing servo system and focus servo acquisition enable with multiple velocity acquisition modes
JP3950529B2 (ja) * 1997-06-27 2007-08-01 パイオニア株式会社 多層記録ディスクのフォーカスジャンプ制御装置及びその制御方法
US6882605B1 (en) * 1999-11-16 2005-04-19 Matsushita Electric Industrial Co., Ltd. Focusing method, method of detecting focal point deviation, method of forming master of data storage medium, focusing control unit, unit for detecting focal point deviation, and unit for forming master of data storage medium
US7016269B2 (en) * 2000-12-21 2006-03-21 Pioneer Corporation Optical pickup apparatus and focusing control method
AU2002241851A1 (en) * 2001-01-11 2002-07-24 Burstein Technologies, Inc. Optical disc analysis system including related methods for biological and medical imaging
US7023766B2 (en) * 2001-01-25 2006-04-04 Dphi Acquisitions, Inc. Flexible servicing of servo algorithms using a digital signal processor
JP2002304746A (ja) * 2001-04-05 2002-10-18 Pioneer Electronic Corp フォーカシング制御装置
JP4219273B2 (ja) * 2001-10-01 2009-02-04 パイオニア株式会社 フォーカス引込機能を有する光ディスクプレーヤ
US7327642B2 (en) * 2002-04-26 2008-02-05 Matsushita Electric Industrial Co., Ltd. Method of moving a beam spot between information storage layers of an optical disk
JP2004213784A (ja) * 2003-01-07 2004-07-29 Sony Corp 光記録媒体処理装置及びその焦点制御方法
JP4659348B2 (ja) * 2003-08-22 2011-03-30 パイオニア株式会社 光ピックアップ装置及び光記録媒体再生装置
JP2005166086A (ja) * 2003-11-28 2005-06-23 Toshiba Corp 回転補正装置および光ディスク装置

Also Published As

Publication number Publication date
US20060262674A1 (en) 2006-11-23
TWI277078B (en) 2007-03-21
US8009522B2 (en) 2011-08-30

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