JPS6412016B2 - - Google Patents

Info

Publication number
JPS6412016B2
JPS6412016B2 JP15433383A JP15433383A JPS6412016B2 JP S6412016 B2 JPS6412016 B2 JP S6412016B2 JP 15433383 A JP15433383 A JP 15433383A JP 15433383 A JP15433383 A JP 15433383A JP S6412016 B2 JPS6412016 B2 JP S6412016B2
Authority
JP
Japan
Prior art keywords
photodetector
reflected light
optical means
optical
optical disk
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
JP15433383A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6045947A (ja
Inventor
Shinsuke Shikama
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP15433383A priority Critical patent/JPS6045947A/ja
Publication of JPS6045947A publication Critical patent/JPS6045947A/ja
Publication of JPS6412016B2 publication Critical patent/JPS6412016B2/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

Landscapes

  • Optical Recording Or Reproduction (AREA)
  • Automatic Focus Adjustment (AREA)
JP15433383A 1983-08-24 1983-08-24 光デイスクヘツドのフオ−カスずれ検出装置 Granted JPS6045947A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15433383A JPS6045947A (ja) 1983-08-24 1983-08-24 光デイスクヘツドのフオ−カスずれ検出装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15433383A JPS6045947A (ja) 1983-08-24 1983-08-24 光デイスクヘツドのフオ−カスずれ検出装置

Publications (2)

Publication Number Publication Date
JPS6045947A JPS6045947A (ja) 1985-03-12
JPS6412016B2 true JPS6412016B2 (en]) 1989-02-28

Family

ID=15581853

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15433383A Granted JPS6045947A (ja) 1983-08-24 1983-08-24 光デイスクヘツドのフオ−カスずれ検出装置

Country Status (1)

Country Link
JP (1) JPS6045947A (en])

Also Published As

Publication number Publication date
JPS6045947A (ja) 1985-03-12

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