JPS5736441A - Jidoshotenchosetsusochi - Google Patents

Jidoshotenchosetsusochi

Info

Publication number
JPS5736441A
JPS5736441A JP10921880A JP10921880A JPS5736441A JP S5736441 A JPS5736441 A JP S5736441A JP 10921880 A JP10921880 A JP 10921880A JP 10921880 A JP10921880 A JP 10921880A JP S5736441 A JPS5736441 A JP S5736441A
Authority
JP
Japan
Prior art keywords
difference
signal
servo system
photodetector
level
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
JP10921880A
Other languages
English (en)
Inventor
Takashi Yamaguchi
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP10921880A priority Critical patent/JPS5736441A/ja
Publication of JPS5736441A publication Critical patent/JPS5736441A/ja
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
    • G11B7/09—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

Landscapes

  • Automatic Focus Adjustment (AREA)
  • Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
JP10921880A 1980-08-11 1980-08-11 Jidoshotenchosetsusochi Pending JPS5736441A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10921880A JPS5736441A (ja) 1980-08-11 1980-08-11 Jidoshotenchosetsusochi

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10921880A JPS5736441A (ja) 1980-08-11 1980-08-11 Jidoshotenchosetsusochi

Publications (1)

Publication Number Publication Date
JPS5736441A true JPS5736441A (ja) 1982-02-27

Family

ID=14504585

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10921880A Pending JPS5736441A (ja) 1980-08-11 1980-08-11 Jidoshotenchosetsusochi

Country Status (1)

Country Link
JP (1) JPS5736441A (ja)

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