JPS56159846A - Optical recording and reproducing device - Google Patents

Optical recording and reproducing device

Info

Publication number
JPS56159846A
JPS56159846A JP6265080A JP6265080A JPS56159846A JP S56159846 A JPS56159846 A JP S56159846A JP 6265080 A JP6265080 A JP 6265080A JP 6265080 A JP6265080 A JP 6265080A JP S56159846 A JPS56159846 A JP S56159846A
Authority
JP
Japan
Prior art keywords
track
driving voltage
recording
shifting motor
stopped
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.)
Granted
Application number
JP6265080A
Other languages
Japanese (ja)
Other versions
JPS6313263B2 (en
Inventor
Akira Ichinose
Tomio Yoshida
Noboru Wakami
Michiyoshi Nagashima
Shunji Harikae
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP6265080A priority Critical patent/JPS56159846A/en
Publication of JPS56159846A publication Critical patent/JPS56159846A/en
Publication of JPS6313263B2 publication Critical patent/JPS6313263B2/ja
Granted 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

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

Abstract

PURPOSE:To discriminate whether the recording and reproducing information is on the concentrical circle track or the spiral track, and to smoothly execute the recording and reproduction, by detecting the variation extent of driving voltage of the tracking mirror, and controlling the shifting motor of the optical head. CONSTITUTION:This device is provided with a means for detecting the variation extent of driving voltage (c) of a tracking mirror 7 provided on an optical head 4 which is shifted relatively against a recording disk 1, and a shifting motor 12 of the head 4 is controlled by its output (h). And, when the variation extent of driving voltage (c) of the mirror 7 has exceeded the specified value as the track of reproduced information is shifted from the spiral track to the concentrical circle track, or vice versa, the shifting motor 12 which is being driven is stopped, and that which has been stopped is driven.
JP6265080A 1980-05-12 1980-05-12 Optical recording and reproducing device Granted JPS56159846A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6265080A JPS56159846A (en) 1980-05-12 1980-05-12 Optical recording and reproducing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6265080A JPS56159846A (en) 1980-05-12 1980-05-12 Optical recording and reproducing device

Publications (2)

Publication Number Publication Date
JPS56159846A true JPS56159846A (en) 1981-12-09
JPS6313263B2 JPS6313263B2 (en) 1988-03-24

Family

ID=13206406

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6265080A Granted JPS56159846A (en) 1980-05-12 1980-05-12 Optical recording and reproducing device

Country Status (1)

Country Link
JP (1) JPS56159846A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0111010A1 (en) * 1982-06-04 1984-06-20 Sony Corporation Optical disc reproducer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0111010A1 (en) * 1982-06-04 1984-06-20 Sony Corporation Optical disc reproducer

Also Published As

Publication number Publication date
JPS6313263B2 (en) 1988-03-24

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