JPS60229240A - 光学的情報再生装置 - Google Patents

光学的情報再生装置

Info

Publication number
JPS60229240A
JPS60229240A JP6356585A JP6356585A JPS60229240A JP S60229240 A JPS60229240 A JP S60229240A JP 6356585 A JP6356585 A JP 6356585A JP 6356585 A JP6356585 A JP 6356585A JP S60229240 A JPS60229240 A JP S60229240A
Authority
JP
Japan
Prior art keywords
amplitude
signal
output
control circuit
reproducing device
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
JP6356585A
Other languages
English (en)
Japanese (ja)
Other versions
JPH0458659B2 (enrdf_load_stackoverflow
Inventor
Ryuichi Koike
隆一 小池
Toshio Sugiyama
俊夫 杉山
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP6356585A priority Critical patent/JPS60229240A/ja
Publication of JPS60229240A publication Critical patent/JPS60229240A/ja
Publication of JPH0458659B2 publication Critical patent/JPH0458659B2/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
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/005—Reproducing
    • 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

Landscapes

  • Automatic Focus Adjustment (AREA)
  • Optical Recording Or Reproduction (AREA)
JP6356585A 1985-03-29 1985-03-29 光学的情報再生装置 Granted JPS60229240A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6356585A JPS60229240A (ja) 1985-03-29 1985-03-29 光学的情報再生装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6356585A JPS60229240A (ja) 1985-03-29 1985-03-29 光学的情報再生装置

Publications (2)

Publication Number Publication Date
JPS60229240A true JPS60229240A (ja) 1985-11-14
JPH0458659B2 JPH0458659B2 (enrdf_load_stackoverflow) 1992-09-18

Family

ID=13232885

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6356585A Granted JPS60229240A (ja) 1985-03-29 1985-03-29 光学的情報再生装置

Country Status (1)

Country Link
JP (1) JPS60229240A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
JPH0458659B2 (enrdf_load_stackoverflow) 1992-09-18

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