DE602005014562D1 - Servoabzweig eines optischen plattenlaufwerkes mit schaltbarer membran und vorrichtung zur strahlablenkungen sowie verfahren zur messung von strahlenlandung und sphärischer aberration - Google Patents

Servoabzweig eines optischen plattenlaufwerkes mit schaltbarer membran und vorrichtung zur strahlablenkungen sowie verfahren zur messung von strahlenlandung und sphärischer aberration

Info

Publication number
DE602005014562D1
DE602005014562D1 DE602005014562T DE602005014562T DE602005014562D1 DE 602005014562 D1 DE602005014562 D1 DE 602005014562D1 DE 602005014562 T DE602005014562 T DE 602005014562T DE 602005014562 T DE602005014562 T DE 602005014562T DE 602005014562 D1 DE602005014562 D1 DE 602005014562D1
Authority
DE
Germany
Prior art keywords
radiation
landing
spherical
berration
detection means
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
DE602005014562T
Other languages
English (en)
Inventor
Sjoerd Stallinga
Bernardus H Hendriks
Teus Tukker
Stein Kuiper
Albert H Immink
Coen T Liedenbaum
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.)
Koninklijke Philips NV
Original Assignee
Koninklijke Philips Electronics NV
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 Koninklijke Philips Electronics NV filed Critical Koninklijke Philips Electronics NV
Publication of DE602005014562D1 publication Critical patent/DE602005014562D1/de
Expired - Fee Related 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
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1353—Diffractive elements, e.g. holograms or gratings
    • 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
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1381—Non-lens elements for altering the properties of the beam, e.g. knife edges, slits, filters or stops
    • 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
    • G11B7/09—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
    • 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
    • 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
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1365—Separate or integrated refractive elements, e.g. wave plates
    • G11B7/1369—Active plates, e.g. liquid crystal panels or electrostrictive elements
    • 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
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1392—Means for controlling the beam wavefront, e.g. for correction of aberration
    • G11B7/13925—Means for controlling the beam wavefront, e.g. for correction of aberration active, e.g. controlled by electrical or mechanical means
    • G11B7/13927—Means for controlling the beam wavefront, e.g. for correction of aberration active, e.g. controlled by electrical or mechanical means during transducing, e.g. to correct for variation of the spherical aberration due to disc tilt or irregularities in the cover layer thickness
DE602005014562T 2004-09-27 2005-09-20 Servoabzweig eines optischen plattenlaufwerkes mit schaltbarer membran und vorrichtung zur strahlablenkungen sowie verfahren zur messung von strahlenlandung und sphärischer aberration Expired - Fee Related DE602005014562D1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP04104678 2004-09-27
PCT/IB2005/053092 WO2006035362A2 (en) 2004-09-27 2005-09-20 Servo branch of optical disc drive comprising a switchable diaphragm and a device for beam deflection, and methods for measuring beam landing and spherical aberration

Publications (1)

Publication Number Publication Date
DE602005014562D1 true DE602005014562D1 (de) 2009-07-02

Family

ID=35643913

Family Applications (1)

Application Number Title Priority Date Filing Date
DE602005014562T Expired - Fee Related DE602005014562D1 (de) 2004-09-27 2005-09-20 Servoabzweig eines optischen plattenlaufwerkes mit schaltbarer membran und vorrichtung zur strahlablenkungen sowie verfahren zur messung von strahlenlandung und sphärischer aberration

Country Status (9)

Country Link
US (1) US20070291598A1 (de)
EP (1) EP1797554B1 (de)
JP (1) JP2008515125A (de)
KR (1) KR20070057989A (de)
CN (1) CN101027721A (de)
AT (1) ATE431957T1 (de)
DE (1) DE602005014562D1 (de)
TW (1) TW200625283A (de)
WO (1) WO2006035362A2 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008120167A2 (en) * 2007-03-31 2008-10-09 Koninklijke Philips Electronics N.V. Optical biopsy device
US20100117827A1 (en) * 2008-11-12 2010-05-13 Mediatek Inc. Method for current reduction for an analog circuit in a data read-out system
CN106840611A (zh) * 2017-02-07 2017-06-13 长沙青波光电科技有限公司 简易评判光学系统优劣的方法
EP3425443A1 (de) * 2017-07-06 2019-01-09 Nokia Technologies Oy Kontaktlinse

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6120228A (ja) * 1984-07-05 1986-01-29 Sony Corp 光学式変位検出装置
JPS6337829A (ja) * 1986-07-31 1988-02-18 Brother Ind Ltd トラツキングサ−ボ装置
EP0630005B1 (de) * 1993-06-21 2001-08-29 Fujitsu Limited Optisches Informationsaufzeichnungs-/wiedergabegerät
CN1112685C (zh) * 1998-04-14 2003-06-25 德国汤姆森-布兰特有限公司 读写光学记录介质的设备
JP2004087089A (ja) * 2002-06-27 2004-03-18 Sharp Corp 光ピックアップ
WO2004055793A1 (en) * 2002-12-18 2004-07-01 Koninklijke Philips Electronics N.V. Optical pickup apparatus.

Also Published As

Publication number Publication date
CN101027721A (zh) 2007-08-29
EP1797554B1 (de) 2009-05-20
US20070291598A1 (en) 2007-12-20
KR20070057989A (ko) 2007-06-07
TW200625283A (en) 2006-07-16
WO2006035362A3 (en) 2006-09-21
WO2006035362A2 (en) 2006-04-06
ATE431957T1 (de) 2009-06-15
EP1797554A2 (de) 2007-06-20
JP2008515125A (ja) 2008-05-08

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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