JPS5439101A - Automatic focusing method - Google Patents

Automatic focusing method

Info

Publication number
JPS5439101A
JPS5439101A JP10326377A JP10326377A JPS5439101A JP S5439101 A JPS5439101 A JP S5439101A JP 10326377 A JP10326377 A JP 10326377A JP 10326377 A JP10326377 A JP 10326377A JP S5439101 A JPS5439101 A JP S5439101A
Authority
JP
Japan
Prior art keywords
automatic focusing
focusing method
astigmatism
inclining
establish
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
JP10326377A
Other languages
Japanese (ja)
Other versions
JPS6161178B2 (en
Inventor
Kenichi Oikami
Shohei Nagai
Takeomi Suzuki
Toru Musha
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 JP10326377A priority Critical patent/JPS5439101A/en
Publication of JPS5439101A publication Critical patent/JPS5439101A/en
Publication of JPS6161178B2 publication Critical patent/JPS6161178B2/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)

Abstract

PURPOSE:To effect the automatic focusing operation of high accuracy with the use of a simple construction by inclining a portion or all of an optical system with respect to an optical axis so as to establish astigmatism.
JP10326377A 1977-08-30 1977-08-30 Automatic focusing method Granted JPS5439101A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10326377A JPS5439101A (en) 1977-08-30 1977-08-30 Automatic focusing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10326377A JPS5439101A (en) 1977-08-30 1977-08-30 Automatic focusing method

Publications (2)

Publication Number Publication Date
JPS5439101A true JPS5439101A (en) 1979-03-26
JPS6161178B2 JPS6161178B2 (en) 1986-12-24

Family

ID=14349539

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10326377A Granted JPS5439101A (en) 1977-08-30 1977-08-30 Automatic focusing method

Country Status (1)

Country Link
JP (1) JPS5439101A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5657013A (en) * 1979-09-28 1981-05-19 Philips Nv Focus error detector
JPS5914136A (en) * 1982-07-14 1984-01-25 Minolta Camera Co Ltd Focus control optical system of optical disk
JPS5999546A (en) * 1982-11-09 1984-06-08 シ−メンス，アクチエンゲゼルシヤフト Micro instruction preparation unit
JPS6063519A (en) * 1984-08-13 1985-04-11 Hitachi Ltd Semiconductor laser device
JPS60102731U (en) * 1983-12-13 1985-07-13 ソニー株式会社 optical erase head
JPS6161240A (en) * 1984-09-03 1986-03-29 Hitachi Ltd optical signal regenerator
JPS6170959A (en) * 1984-09-17 1986-04-11 Miyoshi Oil & Fat Co Ltd Spread food containing vegetable or fruit subjected to alcoholic fermentation, and its preparation
JPS6290990A (en) * 1986-09-12 1987-04-25 Hitachi Ltd Semiconductor laser
JPH0447533A (en) * 1990-06-14 1992-02-17 Pioneer Electron Corp Optical pickup device

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5657013A (en) * 1979-09-28 1981-05-19 Philips Nv Focus error detector
JPS5914136A (en) * 1982-07-14 1984-01-25 Minolta Camera Co Ltd Focus control optical system of optical disk
JPS5999546A (en) * 1982-11-09 1984-06-08 シ−メンス，アクチエンゲゼルシヤフト Micro instruction preparation unit
JPS60102731U (en) * 1983-12-13 1985-07-13 ソニー株式会社 optical erase head
JPS6063519A (en) * 1984-08-13 1985-04-11 Hitachi Ltd Semiconductor laser device
JPS6161240A (en) * 1984-09-03 1986-03-29 Hitachi Ltd optical signal regenerator
JPS6170959A (en) * 1984-09-17 1986-04-11 Miyoshi Oil & Fat Co Ltd Spread food containing vegetable or fruit subjected to alcoholic fermentation, and its preparation
JPS6290990A (en) * 1986-09-12 1987-04-25 Hitachi Ltd Semiconductor laser
JPH0447533A (en) * 1990-06-14 1992-02-17 Pioneer Electron Corp Optical pickup device

Also Published As

Publication number Publication date
JPS6161178B2 (en) 1986-12-24

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