JPS56119942A - Track access system optical disc device - Google Patents

Track access system optical disc device

Info

Publication number
JPS56119942A
JPS56119942A JP2373380A JP2373380A JPS56119942A JP S56119942 A JPS56119942 A JP S56119942A JP 2373380 A JP2373380 A JP 2373380A JP 2373380 A JP2373380 A JP 2373380A JP S56119942 A JPS56119942 A JP S56119942A
Authority
JP
Japan
Prior art keywords
light beam
track
galvanomirror
jump
electric signal
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.)
Pending
Application number
JP2373380A
Other languages
Japanese (ja)
Inventor
Shigeru Arai
Koichi Ogawa
Seiya Ogawa
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.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP2373380A priority Critical patent/JPS56119942A/en
Publication of JPS56119942A publication Critical patent/JPS56119942A/en
Pending 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

Landscapes

  • Moving Of The Head For Recording And Reproducing By Optical Means (AREA)

Abstract

PURPOSE:To perform jumping movement rapidly and stably at the track jump- scanning by applying the energy for jump-scanning from the track under tracing to a light beam deflector thereby deflecting the light beam. CONSTITUTION:The light which comes out of a light beam generator 1 passes through a lens 2, and changes the direction of its optical path by a half mirror 3, is forcused by an objective lens 4 and is projected onto an optical disc medium 5. Now if it is assumed that the light beam is tracing the 1st track y1 and that the electric signal A1 is applied to a light beam deflector in order to jump-scan the light beam to the 2nd track y2 at the time t1 in time axis, the electric signal A1 is supplied as energy A to a galvanomirror. At the time when the light beam crosses the 2nd track y2, the electric signal B1 equivalent to A1 or lower is applied to the light beam deflector and is supplied to the galvanomirror, then the galvanomirror stops around y2 and the light beam can track the 2nd track without causing any position deviation.
JP2373380A 1980-02-27 1980-02-27 Track access system optical disc device Pending JPS56119942A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2373380A JPS56119942A (en) 1980-02-27 1980-02-27 Track access system optical disc device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2373380A JPS56119942A (en) 1980-02-27 1980-02-27 Track access system optical disc device

Publications (1)

Publication Number Publication Date
JPS56119942A true JPS56119942A (en) 1981-09-19

Family

ID=12118504

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2373380A Pending JPS56119942A (en) 1980-02-27 1980-02-27 Track access system optical disc device

Country Status (1)

Country Link
JP (1) JPS56119942A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5226802A (en) * 1975-08-21 1977-02-28 Philips Nv Device for reading diskklike recording carrier
JPS54128707A (en) * 1978-03-27 1979-10-05 Mca Disco Vision Focus servo device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5226802A (en) * 1975-08-21 1977-02-28 Philips Nv Device for reading diskklike recording carrier
JPS54128707A (en) * 1978-03-27 1979-10-05 Mca Disco Vision Focus servo device

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