DE69624553D1 - Optische abtastvorrichtung eines mehrschichtigen aufzeichnungsträgers mit fokusregelungsschaltung - Google Patents

Optische abtastvorrichtung eines mehrschichtigen aufzeichnungsträgers mit fokusregelungsschaltung

Info

Publication number
DE69624553D1
DE69624553D1 DE69624553T DE69624553T DE69624553D1 DE 69624553 D1 DE69624553 D1 DE 69624553D1 DE 69624553 T DE69624553 T DE 69624553T DE 69624553 T DE69624553 T DE 69624553T DE 69624553 D1 DE69624553 D1 DE 69624553D1
Authority
DE
Germany
Prior art keywords
focus control
layer
focal point
information
optical scanner
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 - Lifetime
Application number
DE69624553T
Other languages
English (en)
Inventor
Hermanus Akkermans
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 DE69624553D1 publication Critical patent/DE69624553D1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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

  • Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Facsimile Scanning Arrangements (AREA)
DE69624553T 1995-06-01 1996-07-30 Optische abtastvorrichtung eines mehrschichtigen aufzeichnungsträgers mit fokusregelungsschaltung Expired - Lifetime DE69624553D1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL9502084 1995-06-01
PCT/IB1996/000759 WO1997005606A2 (en) 1995-06-01 1996-07-30 Optical scanning apparatus for a multi-layer record carrier, including a focus control circuit

Publications (1)

Publication Number Publication Date
DE69624553D1 true DE69624553D1 (de) 2002-12-05

Family

ID=70277081

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69624553T Expired - Lifetime DE69624553D1 (de) 1995-06-01 1996-07-30 Optische abtastvorrichtung eines mehrschichtigen aufzeichnungsträgers mit fokusregelungsschaltung

Country Status (5)

Country Link
EP (1) EP0787341B1 (de)
JP (1) JPH10507295A (de)
AT (1) ATE227045T1 (de)
DE (1) DE69624553D1 (de)
WO (1) WO1997005606A2 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU775898B2 (en) * 1998-07-08 2004-08-19 Wea Manufacturing Inc. Focusing method for optical media
US20040156294A1 (en) 2001-04-17 2004-08-12 Katsuya Watanabe Optical disc, information recording/reproducing method and information recording/reproducin apparatus using the same
KR20030033447A (ko) * 2001-10-23 2003-05-01 김순용 잣껍질을 이용한 생활신변용품용 환재

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2458126A1 (fr) * 1979-05-31 1980-12-26 Thomson Brandt Systeme de commande de changement de face lue pour un lecteur optique de support d'information et lecteur optique comportant un tel systeme
US5255262A (en) * 1991-06-04 1993-10-19 International Business Machines Corporation Multiple data surface optical data storage system with transmissive data surfaces
JP3413684B2 (ja) * 1994-12-16 2003-06-03 ソニー株式会社 多層光ディスク再生装置および方法

Also Published As

Publication number Publication date
EP0787341B1 (de) 2002-10-30
ATE227045T1 (de) 2002-11-15
JPH10507295A (ja) 1998-07-14
EP0787341A2 (de) 1997-08-06
WO1997005606A2 (en) 1997-02-13
WO1997005606A3 (en) 1997-03-13

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Legal Events

Date Code Title Description
8332 No legal effect for de