JPS6168739A - 焦点合せ装置 - Google Patents

焦点合せ装置

Info

Publication number
JPS6168739A
JPS6168739A JP18929084A JP18929084A JPS6168739A JP S6168739 A JPS6168739 A JP S6168739A JP 18929084 A JP18929084 A JP 18929084A JP 18929084 A JP18929084 A JP 18929084A JP S6168739 A JPS6168739 A JP S6168739A
Authority
JP
Japan
Prior art keywords
signal
lens
recording medium
output signal
focus
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
JP18929084A
Other languages
English (en)
Japanese (ja)
Other versions
JPH0583968B2 (enrdf_load_stackoverflow
Inventor
Minoru Uehara
稔 上原
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.)
Denso Ten Ltd
Original Assignee
Denso Ten 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 Denso Ten Ltd filed Critical Denso Ten Ltd
Priority to JP18929084A priority Critical patent/JPS6168739A/ja
Publication of JPS6168739A publication Critical patent/JPS6168739A/ja
Publication of JPH0583968B2 publication Critical patent/JPH0583968B2/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
    • G11B7/08505—Methods for track change, selection or preliminary positioning by moving the head
    • G11B7/08511—Methods for track change, selection or preliminary positioning by moving the head with focus pull-in only

Landscapes

  • Automatic Focus Adjustment (AREA)
  • Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
  • Optical Recording Or Reproduction (AREA)
JP18929084A 1984-09-10 1984-09-10 焦点合せ装置 Granted JPS6168739A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18929084A JPS6168739A (ja) 1984-09-10 1984-09-10 焦点合せ装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18929084A JPS6168739A (ja) 1984-09-10 1984-09-10 焦点合せ装置

Publications (2)

Publication Number Publication Date
JPS6168739A true JPS6168739A (ja) 1986-04-09
JPH0583968B2 JPH0583968B2 (enrdf_load_stackoverflow) 1993-11-30

Family

ID=16238850

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18929084A Granted JPS6168739A (ja) 1984-09-10 1984-09-10 焦点合せ装置

Country Status (1)

Country Link
JP (1) JPS6168739A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104052921A (zh) * 2013-03-14 2014-09-17 奥林巴斯株式会社 焦点调节装置以及焦点调节方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104052921A (zh) * 2013-03-14 2014-09-17 奥林巴斯株式会社 焦点调节装置以及焦点调节方法
JP2014178435A (ja) * 2013-03-14 2014-09-25 Olympus Corp 焦点調節装置及び焦点調節方法

Also Published As

Publication number Publication date
JPH0583968B2 (enrdf_load_stackoverflow) 1993-11-30

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Legal Events

Date Code Title Description
EXPY Cancellation because of completion of term