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EP1095375A4 - Focusing method for optical media - Google Patents

Focusing method for optical media

Info

Publication number
EP1095375A4
EP1095375A4 EP98935578A EP98935578A EP1095375A4 EP 1095375 A4 EP1095375 A4 EP 1095375A4 EP 98935578 A EP98935578 A EP 98935578A EP 98935578 A EP98935578 A EP 98935578A EP 1095375 A4 EP1095375 A4 EP 1095375A4
Authority
EP
European Patent Office
Prior art keywords
optical media
focusing method
focusing
media
optical
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Withdrawn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
EP98935578A
Other languages
German (de)
French (fr)
Other versions
EP1095375A1 (en
Inventor
Timothy Nix
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.)
Wea Manufacturing Inc
Original Assignee
Wea Manufacturing Inc
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 Wea Manufacturing Inc filed Critical Wea Manufacturing Inc
Priority claimed from PCT/US1998/014203 external-priority patent/WO2000003391A1/en
Publication of EP1095375A1 publication Critical patent/EP1095375A1/en
Publication of EP1095375A4 publication Critical patent/EP1095375A4/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Withdrawn legal-status Critical Current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
    • G11B7/0945—Methods for initialising servos, start-up sequences
    • 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
    • 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
EP98935578A 1998-07-08 1998-07-08 Focusing method for optical media Withdrawn EP1095375A4 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1998/014203 WO2000003391A1 (en) 1996-05-24 1998-07-08 Focusing method for optical media

Publications (2)

Publication Number Publication Date
EP1095375A1 EP1095375A1 (en) 2001-05-02
EP1095375A4 true EP1095375A4 (en) 2004-05-12

Family

ID=22267448

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98935578A Withdrawn EP1095375A4 (en) 1998-07-08 1998-07-08 Focusing method for optical media

Country Status (2)

Country Link
EP (1) EP1095375A4 (en)
AU (1) AU775898B2 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0717401A1 (en) * 1994-12-16 1996-06-19 Sony Corporation Apparatus and method for reproducing data from multilayered disks
WO1997005606A2 (en) * 1995-06-01 1997-02-13 Philips Electronics N.V. Optical scanning apparatus for a multi-layer record carrier, including a focus control circuit

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4624496B2 (en) * 1995-07-31 2011-02-02 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ Optical scanner for multilayer recording carrier including focus control circuit
KR0183172B1 (en) * 1995-09-30 1999-04-15 김광호 Dual layer disk focusing apparatus and method thereof

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0717401A1 (en) * 1994-12-16 1996-06-19 Sony Corporation Apparatus and method for reproducing data from multilayered disks
WO1997005606A2 (en) * 1995-06-01 1997-02-13 Philips Electronics N.V. Optical scanning apparatus for a multi-layer record carrier, including a focus control circuit

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO0003391A1 *

Also Published As

Publication number Publication date
EP1095375A1 (en) 2001-05-02
AU775898B2 (en) 2004-08-19
AU8479398A (en) 2000-02-01

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