JPH0458657B2 - - Google Patents

Info

Publication number
JPH0458657B2
JPH0458657B2 JP4743084A JP4743084A JPH0458657B2 JP H0458657 B2 JPH0458657 B2 JP H0458657B2 JP 4743084 A JP4743084 A JP 4743084A JP 4743084 A JP4743084 A JP 4743084A JP H0458657 B2 JPH0458657 B2 JP H0458657B2
Authority
JP
Japan
Prior art keywords
disk
focus
guide groove
error signal
tracking
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
JP4743084A
Other languages
English (en)
Japanese (ja)
Other versions
JPS60191440A (ja
Inventor
Tomya Myazaki
Noboru Wakami
Yoshikazu Goto
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 JP4743084A priority Critical patent/JPS60191440A/ja
Publication of JPS60191440A publication Critical patent/JPS60191440A/ja
Publication of JPH0458657B2 publication Critical patent/JPH0458657B2/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
    • G11B7/09—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
    • 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

Landscapes

  • Automatic Focus Adjustment (AREA)
  • Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
  • Optical Recording Or Reproduction (AREA)
JP4743084A 1984-03-12 1984-03-12 光学式情報装置 Granted JPS60191440A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4743084A JPS60191440A (ja) 1984-03-12 1984-03-12 光学式情報装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4743084A JPS60191440A (ja) 1984-03-12 1984-03-12 光学式情報装置

Publications (2)

Publication Number Publication Date
JPS60191440A JPS60191440A (ja) 1985-09-28
JPH0458657B2 true JPH0458657B2 (enrdf_load_stackoverflow) 1992-09-18

Family

ID=12774931

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4743084A Granted JPS60191440A (ja) 1984-03-12 1984-03-12 光学式情報装置

Country Status (1)

Country Link
JP (1) JPS60191440A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
JPS60191440A (ja) 1985-09-28

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