JPS6045948A - 光デイスクヘツドのフオ−カスずれ検出装置 - Google Patents

光デイスクヘツドのフオ−カスずれ検出装置

Info

Publication number
JPS6045948A
JPS6045948A JP15433483A JP15433483A JPS6045948A JP S6045948 A JPS6045948 A JP S6045948A JP 15433483 A JP15433483 A JP 15433483A JP 15433483 A JP15433483 A JP 15433483A JP S6045948 A JPS6045948 A JP S6045948A
Authority
JP
Japan
Prior art keywords
photodetector
divided
light
light beam
reflected light
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
JP15433483A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6412017B2 (enrdf_load_stackoverflow
Inventor
Shinsuke Shikama
信介 鹿間
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 JP15433483A priority Critical patent/JPS6045948A/ja
Publication of JPS6045948A publication Critical patent/JPS6045948A/ja
Publication of JPS6412017B2 publication Critical patent/JPS6412017B2/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

  • Automatic Focus Adjustment (AREA)
  • Optical Recording Or Reproduction (AREA)
JP15433483A 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 JPS6045948A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15433483A JPS6045948A (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
JP15433483A JPS6045948A (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
JPS6045948A true JPS6045948A (ja) 1985-03-12
JPS6412017B2 JPS6412017B2 (enrdf_load_stackoverflow) 1989-02-28

Family

ID=15581876

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15433483A Granted JPS6045948A (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) JPS6045948A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63229640A (ja) * 1987-03-19 1988-09-26 Matsushita Electric Ind Co Ltd 光ヘツド装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63229640A (ja) * 1987-03-19 1988-09-26 Matsushita Electric Ind Co Ltd 光ヘツド装置

Also Published As

Publication number Publication date
JPS6412017B2 (enrdf_load_stackoverflow) 1989-02-28

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