DE69621781T2 - Gerät zur wiedergabe eines optisch lesbaren aufzeichnungsträgers - Google Patents

Gerät zur wiedergabe eines optisch lesbaren aufzeichnungsträgers

Info

Publication number
DE69621781T2
DE69621781T2 DE69621781T DE69621781T DE69621781T2 DE 69621781 T2 DE69621781 T2 DE 69621781T2 DE 69621781 T DE69621781 T DE 69621781T DE 69621781 T DE69621781 T DE 69621781T DE 69621781 T2 DE69621781 T2 DE 69621781T2
Authority
DE
Germany
Prior art keywords
playing back
optically readable
recorder
readable recorder
optically
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
DE69621781T
Other languages
English (en)
Other versions
DE69621781D1 (de
Inventor
Johannes Braat
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
Application granted granted Critical
Publication of DE69621781D1 publication Critical patent/DE69621781D1/de
Publication of DE69621781T2 publication Critical patent/DE69621781T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • G11B7/0941—Methods and circuits for servo gain or phase compensation during operation
    • 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
    • G11B7/0908—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 focusing 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
    • G11B7/0908—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 focusing only
    • G11B7/0916—Foucault or knife-edge methods
    • 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
    • G11B7/0943—Methods and circuits for performing mathematical operations on individual detector segment outputs
    • 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
    • G11B2007/0003—Recording, reproducing or erasing systems characterised by the structure or type of the carrier
    • G11B2007/0006—Recording, reproducing or erasing systems characterised by the structure or type of the carrier adapted for scanning different types of carrier, e.g. CD & DVD
    • 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
    • G11B2007/0003—Recording, reproducing or erasing systems characterised by the structure or type of the carrier
    • G11B2007/0009—Recording, reproducing or erasing systems characterised by the structure or type of the carrier for carriers having data stored in three dimensions, e.g. volume storage
    • G11B2007/0013—Recording, reproducing or erasing systems characterised by the structure or type of the carrier for carriers having data stored in three dimensions, e.g. volume storage for carriers having multiple discrete layers

Landscapes

  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Optical Head (AREA)
DE69621781T 1995-12-27 1996-12-05 Gerät zur wiedergabe eines optisch lesbaren aufzeichnungsträgers Expired - Fee Related DE69621781T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP95203642 1995-12-27
PCT/IB1996/001361 WO1997024718A1 (en) 1995-12-27 1996-12-05 Apparatus for scanning an optically readable record carrier

Publications (2)

Publication Number Publication Date
DE69621781D1 DE69621781D1 (de) 2002-07-18
DE69621781T2 true DE69621781T2 (de) 2003-03-13

Family

ID=8221016

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69621781T Expired - Fee Related DE69621781T2 (de) 1995-12-27 1996-12-05 Gerät zur wiedergabe eines optisch lesbaren aufzeichnungsträgers

Country Status (6)

Country Link
US (1) US5841746A (de)
EP (1) EP0812458B1 (de)
JP (1) JPH11501445A (de)
DE (1) DE69621781T2 (de)
TW (1) TW318233B (de)
WO (1) WO1997024718A1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19743935A1 (de) 1997-10-04 1999-04-08 Thomson Brandt Gmbh Gerät zum Lesen oder Beschreiben optischer Aufzeichnungsträger
DE69833672T2 (de) * 1997-11-07 2006-09-07 Koninklijke Philips Electronics N.V. Optische abtastvorrichtung
JP3605279B2 (ja) * 1998-02-25 2004-12-22 パイオニア株式会社 光学式ピックアップ
JP2008192191A (ja) * 2007-01-31 2008-08-21 Toshiba Corp 信号処理方法及び光ディスク装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4733065A (en) * 1984-06-27 1988-03-22 Canon Kabushiki Kaisha Optical head device with diffraction grating for separating a light beam incident on an optical recording medium from a light beam reflected therefrom
US4933924A (en) * 1987-07-03 1990-06-12 Seiko Epson Corporation Optical head and magneto-optical read/write device
JP3028854B2 (ja) * 1990-07-18 2000-04-04 セイコーエプソン株式会社 光ヘッド及び光記憶再生装置
JPH06111344A (ja) * 1992-09-30 1994-04-22 Pioneer Electron Corp 光ピックアップ装置
JPH07311970A (ja) * 1994-05-17 1995-11-28 Seiko Epson Corp 光ヘッド及び光記憶装置
TW363182B (en) * 1995-02-09 1999-07-01 Hitachi Ltd Positioning apparatus for optical disks

Also Published As

Publication number Publication date
WO1997024718A1 (en) 1997-07-10
US5841746A (en) 1998-11-24
JPH11501445A (ja) 1999-02-02
EP0812458A1 (de) 1997-12-17
TW318233B (de) 1997-10-21
DE69621781D1 (de) 2002-07-18
EP0812458B1 (de) 2002-06-12

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8320 Willingness to grant licences declared (paragraph 23)
8339 Ceased/non-payment of the annual fee