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AU573128B2 - Tracking method and tracking system - Google Patents
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AU573128B2 - Tracking method and tracking system - Google Patents

Tracking method and tracking system

Info

Publication number
AU573128B2
AU573128B2 AU71972/87A AU7197287A AU573128B2 AU 573128 B2 AU573128 B2 AU 573128B2 AU 71972/87 A AU71972/87 A AU 71972/87A AU 7197287 A AU7197287 A AU 7197287A AU 573128 B2 AU573128 B2 AU 573128B2
Authority
AU
Australia
Prior art keywords
tracking
tracking system
tracking method
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
Application number
AU71972/87A
Other versions
AU7197287A (en
Inventor
Ludwig Ceshkovsky
Wayne Ray Dakin
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.)
Discovision Associates
Original Assignee
Discovision Associates
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 AU47649/85A external-priority patent/AU562979B2/en
Application filed by Discovision Associates filed Critical Discovision Associates
Priority to AU71972/87A priority Critical patent/AU573128B2/en
Publication of AU7197287A publication Critical patent/AU7197287A/en
Application granted granted Critical
Publication of AU573128B2 publication Critical patent/AU573128B2/en
Anticipated expiration legal-status Critical
Expired 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
    • G11B7/085—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
    • G11B7/08529—Methods and circuits to control the velocity of the head as it traverses the tracks
AU71972/87A 1978-03-27 1987-04-24 Tracking method and tracking system Expired AU573128B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU71972/87A AU573128B2 (en) 1978-03-27 1987-04-24 Tracking method and tracking system

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US89067078A 1978-03-27 1978-03-27
AU530869 1979-09-26
AU47649/85A AU562979B2 (en) 1978-03-27 1985-09-20 Video disc player
AU71972/87A AU573128B2 (en) 1978-03-27 1987-04-24 Tracking method and tracking system

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
AU47649/85A Division AU562979B2 (en) 1978-03-27 1985-09-20 Video disc player

Publications (2)

Publication Number Publication Date
AU7197287A AU7197287A (en) 1987-08-13
AU573128B2 true AU573128B2 (en) 1988-05-26

Family

ID=27154516

Family Applications (1)

Application Number Title Priority Date Filing Date
AU71972/87A Expired AU573128B2 (en) 1978-03-27 1987-04-24 Tracking method and tracking system

Country Status (1)

Country Link
AU (1) AU573128B2 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU500259B2 (en) * 1975-08-21 1979-05-17 N.V. Philips Gloeilampenfabrieken Apparatus for reading a disc-shaped record carrier

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU500259B2 (en) * 1975-08-21 1979-05-17 N.V. Philips Gloeilampenfabrieken Apparatus for reading a disc-shaped record carrier

Also Published As

Publication number Publication date
AU7197287A (en) 1987-08-13

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Legal Events

Date Code Title Description
MK14 Patent ceased section 143(a) (annual fees not paid) or expired