KR850000421B1 - 초점 검출방법 - Google Patents

초점 검출방법 Download PDF

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Publication number
KR850000421B1
KR850000421B1 KR1019810003016A KR810003016A KR850000421B1 KR 850000421 B1 KR850000421 B1 KR 850000421B1 KR 1019810003016 A KR1019810003016 A KR 1019810003016A KR 810003016 A KR810003016 A KR 810003016A KR 850000421 B1 KR850000421 B1 KR 850000421B1
Authority
KR
South Korea
Prior art keywords
light
reflected
prism
incident
objective lens
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
KR1019810003016A
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English (en)
Korean (ko)
Other versions
KR830006707A (ko
Inventor
무샤도오루
Original Assignee
오림파스 고오가꾸 고오교 가부시끼가이샤
기다무라시계오
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 오림파스 고오가꾸 고오교 가부시끼가이샤, 기다무라시계오 filed Critical 오림파스 고오가꾸 고오교 가부시끼가이샤
Publication of KR830006707A publication Critical patent/KR830006707A/ko
Application granted granted Critical
Publication of KR850000421B1 publication Critical patent/KR850000421B1/ko
Expired legal-status Critical Current

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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

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Optical Head (AREA)
  • Automatic Focus Adjustment (AREA)
KR1019810003016A 1980-08-19 1981-08-19 초점 검출방법 Expired KR850000421B1 (ko)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP55-114463 1980-08-19
JP11446380A JPS5738405A (en) 1980-08-19 1980-08-19 Method and device for detection of focal point
JP114463 1980-08-19

Publications (2)

Publication Number Publication Date
KR830006707A KR830006707A (ko) 1983-10-06
KR850000421B1 true KR850000421B1 (ko) 1985-03-26

Family

ID=14638361

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019810003016A Expired KR850000421B1 (ko) 1980-08-19 1981-08-19 초점 검출방법

Country Status (2)

Country Link
JP (1) JPS5738405A (enrdf_load_html_response)
KR (1) KR850000421B1 (enrdf_load_html_response)

Also Published As

Publication number Publication date
JPS6343813B2 (enrdf_load_html_response) 1988-09-01
KR830006707A (ko) 1983-10-06
JPS5738405A (en) 1982-03-03

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