AU5175590A - Switchover circuit for the optical-scanning device of an optical recording and/or playing device - Google Patents

Switchover circuit for the optical-scanning device of an optical recording and/or playing device

Info

Publication number
AU5175590A
AU5175590A AU51755/90A AU5175590A AU5175590A AU 5175590 A AU5175590 A AU 5175590A AU 51755/90 A AU51755/90 A AU 51755/90A AU 5175590 A AU5175590 A AU 5175590A AU 5175590 A AU5175590 A AU 5175590A
Authority
AU
Australia
Prior art keywords
optical
switchover circuit
optical recording
scanning device
playing device
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.)
Abandoned
Application number
AU51755/90A
Inventor
Christian Buchler
Friedhelm Zucker
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.)
Deutsche Thomson Brandt GmbH
Original Assignee
Deutsche Thomson Brandt GmbH
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
Priority claimed from DE3911525A external-priority patent/DE3911525A1/en
Application filed by Deutsche Thomson Brandt GmbH filed Critical Deutsche Thomson Brandt GmbH
Publication of AU5175590A publication Critical patent/AU5175590A/en
Abandoned 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
    • 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
    • G11B7/085—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection
    • G11B7/08505—Methods for track change, selection or preliminary positioning by moving the head
    • G11B7/08517—Methods for track change, selection or preliminary positioning by moving the head with tracking pull-in only
AU51755/90A 1989-04-08 1990-03-03 Switchover circuit for the optical-scanning device of an optical recording and/or playing device Abandoned AU5175590A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3911525 1989-04-08
DE3911525A DE3911525A1 (en) 1988-11-17 1989-04-08 Circuit for detecting the type of an optical recording carrier

Publications (1)

Publication Number Publication Date
AU5175590A true AU5175590A (en) 1990-11-05

Family

ID=6378223

Family Applications (1)

Application Number Title Priority Date Filing Date
AU51755/90A Abandoned AU5175590A (en) 1989-04-08 1990-03-03 Switchover circuit for the optical-scanning device of an optical recording and/or playing device

Country Status (4)

Country Link
KR (1) KR920700446A (en)
CN (1) CN1046239A (en)
AU (1) AU5175590A (en)
WO (1) WO1990012394A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5255262A (en) * 1991-06-04 1993-10-19 International Business Machines Corporation Multiple data surface optical data storage system with transmissive data surfaces
US5452284A (en) * 1992-09-14 1995-09-19 Matsushita Electric Industrial Co., Ltd. Optical recording/reproducing medium and apparatus using land and groove encoded information signals and identification signals including position information

Also Published As

Publication number Publication date
KR920700446A (en) 1992-02-19
WO1990012394A1 (en) 1990-10-18
CN1046239A (en) 1990-10-17

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