JPH0423330B2 - - Google Patents

Info

Publication number
JPH0423330B2
JPH0423330B2 JP14225183A JP14225183A JPH0423330B2 JP H0423330 B2 JPH0423330 B2 JP H0423330B2 JP 14225183 A JP14225183 A JP 14225183A JP 14225183 A JP14225183 A JP 14225183A JP H0423330 B2 JPH0423330 B2 JP H0423330B2
Authority
JP
Japan
Prior art keywords
signal
level
focus
circuit
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.)
Expired
Application number
JP14225183A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6035337A (ja
Inventor
Junichi Horigome
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.)
Sony Corp
Original Assignee
Sony 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 Sony Corp filed Critical Sony Corp
Priority to JP14225183A priority Critical patent/JPS6035337A/ja
Publication of JPS6035337A publication Critical patent/JPS6035337A/ja
Publication of JPH0423330B2 publication Critical patent/JPH0423330B2/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)
  • Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
  • Optical Recording Or Reproduction (AREA)
JP14225183A 1983-08-03 1983-08-03 光記録／再生装置 Granted JPS6035337A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14225183A JPS6035337A (ja) 1983-08-03 1983-08-03 光記録／再生装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14225183A JPS6035337A (ja) 1983-08-03 1983-08-03 光記録／再生装置

Publications (2)

Publication Number Publication Date
JPS6035337A JPS6035337A (ja) 1985-02-23
JPH0423330B2 true JPH0423330B2 (ko) 1992-04-22

Family

ID=15310961

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14225183A Granted JPS6035337A (ja) 1983-08-03 1983-08-03 光記録／再生装置

Country Status (1)

Country Link
JP (1) JPS6035337A (ko)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6161238A (ja) * 1984-08-31 1986-03-29 Fujitsu Ltd フオ−カス引き込み方式
JPH01185842A (ja) * 1988-01-20 1989-07-25 Matsushita Graphic Commun Syst Inc フォーカス引き込み完了確認方法

Also Published As

Publication number Publication date
JPS6035337A (ja) 1985-02-23

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