AU7772401A - Method and device for detecting positional deviation of lens in optical disk unit - Google Patents

Method and device for detecting positional deviation of lens in optical disk unit

Info

Publication number
AU7772401A
AU7772401A AU77724/01A AU7772401A AU7772401A AU 7772401 A AU7772401 A AU 7772401A AU 77724/01 A AU77724/01 A AU 77724/01A AU 7772401 A AU7772401 A AU 7772401A AU 7772401 A AU7772401 A AU 7772401A
Authority
AU
Australia
Prior art keywords
lens
optical disk
positional deviation
disk unit
detecting positional
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.)
Withdrawn
Application number
AU77724/01A
Inventor
Akihiro Arai
Takao Hayashi
Toru Nakamura
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Publication of AU7772401A publication Critical patent/AU7772401A/en
Withdrawn legal-status Critical Current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
    • G11B7/0901—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 track following 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
    • G11B7/094—Methods and circuits for servo offset compensation
AU77724/01A 2000-08-28 2001-08-09 Method and device for detecting positional deviation of lens in optical disk unit Withdrawn AU7772401A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2000257385 2000-08-28
JP2000-257385 2000-08-28
PCT/JP2001/006838 WO2002019325A1 (en) 2000-08-28 2001-08-09 Method and device for detecting positional deviation of lens in optical disk unit

Publications (1)

Publication Number Publication Date
AU7772401A true AU7772401A (en) 2002-03-13

Family

ID=18745849

Family Applications (1)

Application Number Title Priority Date Filing Date
AU77724/01A Withdrawn AU7772401A (en) 2000-08-28 2001-08-09 Method and device for detecting positional deviation of lens in optical disk unit

Country Status (2)

Country Link
AU (1) AU7772401A (en)
WO (1) WO2002019325A1 (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0614255Y2 (en) * 1985-05-29 1994-04-13 日本コロムビア株式会社 Optical disk device
JPH0746422B2 (en) * 1986-02-05 1995-05-17 株式会社日立製作所 Constant linear velocity optical disc file system
JP2000215474A (en) * 1999-01-21 2000-08-04 Asahi Optical Co Ltd Sensor system for optical disk

Also Published As

Publication number Publication date
WO2002019325A1 (en) 2002-03-07

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Legal Events

Date Code Title Description
MK13 Application withdrawn section 141(2)/reg 8.3(2) - pct appl. non-entering nat. phase, withdrawn by applicant