TW200625283A - 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 - Google Patents

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

Info

Publication number
TW200625283A
TW200625283A TW094133106A TW94133106A TW200625283A TW 200625283 A TW200625283 A TW 200625283A TW 094133106 A TW094133106 A TW 094133106A TW 94133106 A TW94133106 A TW 94133106A TW 200625283 A TW200625283 A TW 200625283A
Authority
TW
Taiwan
Prior art keywords
spherical aberration
methods
optical disc
disc drive
detection means
Prior art date
Application number
TW094133106A
Other languages
English (en)
Inventor
Sjoerd Stallinga
Bernardus Hendrikus Wilhelmus Hendriks
Teus Tukker
Stein Kuiper
Albert Hendrik Jan Immink
Coen Theodorus Hubertus Fransiscus Liedenbaum
Original Assignee
Koninkl 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 Koninkl Philips Electronics Nv filed Critical Koninkl Philips Electronics Nv
Publication of TW200625283A publication Critical patent/TW200625283A/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
    • G11B7/09—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
    • G11B7/1353—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
    • G11B7/1365—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
    • G11B7/1381—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
    • G11B7/12—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

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Optical Head (AREA)
  • Length Measuring Devices By Optical Means (AREA)
TW094133106A 2004-09-27 2005-09-23 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 TW200625283A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04104678 2004-09-27

Publications (1)

Publication Number Publication Date
TW200625283A true TW200625283A (en) 2006-07-16

Family

ID=35643913

Family Applications (1)

Application Number Title Priority Date Filing Date
TW094133106A TW200625283A (en) 2004-09-27 2005-09-23 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

Country Status (9)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI405198B (zh) * 2008-11-12 2013-08-11 Mediatek Inc 資料讀出系統與用於電流降低之方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2140292B1 (en) * 2007-03-31 2017-03-01 Koninklijke Philips N.V. Optical biopsy device
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 (en) * 2017-07-06 2019-01-09 Nokia Technologies Oy Contact lens comprising an electrowetting variable aperture

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 (en) * 1993-06-21 2001-08-29 Fujitsu Limited Optical information recording/reproducing apparatus
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.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI405198B (zh) * 2008-11-12 2013-08-11 Mediatek Inc 資料讀出系統與用於電流降低之方法

Also Published As

Publication number Publication date
US20070291598A1 (en) 2007-12-20
EP1797554B1 (en) 2009-05-20
EP1797554A2 (en) 2007-06-20
JP2008515125A (ja) 2008-05-08
WO2006035362A2 (en) 2006-04-06
CN101027721A (zh) 2007-08-29
DE602005014562D1 (de) 2009-07-02
ATE431957T1 (de) 2009-06-15
WO2006035362A3 (en) 2006-09-21
KR20070057989A (ko) 2007-06-07

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