JPS647407B2 - - Google Patents

Info

Publication number
JPS647407B2
JPS647407B2 JP55125252A JP12525280A JPS647407B2 JP S647407 B2 JPS647407 B2 JP S647407B2 JP 55125252 A JP55125252 A JP 55125252A JP 12525280 A JP12525280 A JP 12525280A JP S647407 B2 JPS647407 B2 JP S647407B2
Authority
JP
Japan
Prior art keywords
light
reflected
photodetector
information
prism
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
JP55125252A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5749908A (en
Inventor
Hisatsune Tsuda
Asao Hayashi
Kenichi Ooikami
Masatoshi Ida
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.)
Olympus Corp
Original Assignee
Olympus Optical 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 Olympus Optical Co Ltd filed Critical Olympus Optical Co Ltd
Priority to JP55125252A priority Critical patent/JPS5749908A/ja
Publication of JPS5749908A publication Critical patent/JPS5749908A/ja
Publication of JPS647407B2 publication Critical patent/JPS647407B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/28—Systems for automatic generation of focusing signals
    • G02B7/30—Systems for automatic generation of focusing signals using parallactic triangle with a base line
    • G02B7/32—Systems for automatic generation of focusing signals using parallactic triangle with a base line using active means, e.g. light emitter
    • 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

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Automatic Focus Adjustment (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Optical Head (AREA)
JP55125252A 1980-09-11 1980-09-11 Method and device for detecting focus Granted JPS5749908A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55125252A JPS5749908A (en) 1980-09-11 1980-09-11 Method and device for detecting focus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55125252A JPS5749908A (en) 1980-09-11 1980-09-11 Method and device for detecting focus

Publications (2)

Publication Number Publication Date
JPS5749908A JPS5749908A (en) 1982-03-24
JPS647407B2 true JPS647407B2 (it) 1989-02-08

Family

ID=14905509

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55125252A Granted JPS5749908A (en) 1980-09-11 1980-09-11 Method and device for detecting focus

Country Status (1)

Country Link
JP (1) JPS5749908A (it)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3272263B2 (ja) 1997-04-18 2002-04-08 タイコエレクトロニクスアンプ株式会社 端子振れ防止機構を備えたコネクタ
JP5644919B1 (ja) 2013-08-26 2014-12-24 第一精工株式会社 コネクタ端子およびその製造方法

Also Published As

Publication number Publication date
JPS5749908A (en) 1982-03-24

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