JPS6329337B2 - - Google Patents

Info

Publication number
JPS6329337B2
JPS6329337B2 JP16097879A JP16097879A JPS6329337B2 JP S6329337 B2 JPS6329337 B2 JP S6329337B2 JP 16097879 A JP16097879 A JP 16097879A JP 16097879 A JP16097879 A JP 16097879A JP S6329337 B2 JPS6329337 B2 JP S6329337B2
Authority
JP
Japan
Prior art keywords
objective lens
light beam
information carrier
lens
zone plate
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
JP16097879A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5683848A (en
Inventor
Tetsuo Hosomi
Toshiro Kamogawa
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP16097879A priority Critical patent/JPS5683848A/ja
Publication of JPS5683848A publication Critical patent/JPS5683848A/ja
Publication of JPS6329337B2 publication Critical patent/JPS6329337B2/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
    • G11B7/09—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
    • G11B7/0908—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 for focusing only

Landscapes

  • Automatic Focus Adjustment (AREA)
  • Optical Recording Or Reproduction (AREA)
JP16097879A 1979-12-11 1979-12-11 Focusing device Granted JPS5683848A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16097879A JPS5683848A (en) 1979-12-11 1979-12-11 Focusing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16097879A JPS5683848A (en) 1979-12-11 1979-12-11 Focusing device

Publications (2)

Publication Number Publication Date
JPS5683848A JPS5683848A (en) 1981-07-08
JPS6329337B2 true JPS6329337B2 (no) 1988-06-13

Family

ID=15726240

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16097879A Granted JPS5683848A (en) 1979-12-11 1979-12-11 Focusing device

Country Status (1)

Country Link
JP (1) JPS5683848A (no)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57186240A (en) * 1981-11-09 1982-11-16 Teac Co Optical reproducing device
JPS6076038A (ja) * 1983-10-03 1985-04-30 Mitsubishi Electric Corp 光学式情報処理装置
JPH073698B2 (ja) * 1985-01-14 1995-01-18 オリンパス光学工業株式会社 光学式ピツクアツプ
JPH01130332A (ja) * 1987-11-17 1989-05-23 Toshiba Corp 焦点制御装置
JP2746957B2 (ja) * 1988-11-30 1998-05-06 株式会社東芝 焦点制御装置
KR101397902B1 (ko) 2012-02-07 2014-05-20 차정원 상 분할 프리즘을 이용한 골프장 홀 거리 측정기

Also Published As

Publication number Publication date
JPS5683848A (en) 1981-07-08

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