JPS56126813A - Incident position detector of luminous flux - Google Patents

Incident position detector of luminous flux

Info

Publication number
JPS56126813A
JPS56126813A JP3123580A JP3123580A JPS56126813A JP S56126813 A JPS56126813 A JP S56126813A JP 3123580 A JP3123580 A JP 3123580A JP 3123580 A JP3123580 A JP 3123580A JP S56126813 A JPS56126813 A JP S56126813A
Authority
JP
Japan
Prior art keywords
time
output
integrating
image pickup
pickup element
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
JP3123580A
Other languages
Japanese (ja)
Other versions
JPH0213763B2 (en
Inventor
Yukichi Niwa
Mitsutoshi Owada
Yasuo Ogino
Kazuo Tanaka
Noboru Yukimura
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP3123580A priority Critical patent/JPS56126813A/en
Priority to US06/190,454 priority patent/US4384199A/en
Priority to DE19803036343 priority patent/DE3036343A1/en
Publication of JPS56126813A publication Critical patent/JPS56126813A/en
Publication of JPH0213763B2 publication Critical patent/JPH0213763B2/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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Automatic Focus Adjustment (AREA)
  • Measurement Of Optical Distance (AREA)
  • Focusing (AREA)

Abstract

PURPOSE:To shorten a focusing detection time by dividing a self-scanning type image pickup element into two areas, and deciding a reset time for integrating a difference of the time series output in each area, as a time required by the time when an integral value of the sum of the time series outputs in each area attains to a prescribed value. CONSTITUTION:A light beam which has been emitted from the light source 2 is reflected by the prism 4 and the object surface 5, and is made incident into the self- scanning type image pickup element 3. This element 3 is driven by the driving circuit 18, and its time series output is inputted to the analog gate 31 which becomes on only in a prescribed time section, through the AC amplifier 9, etc. The integrating circuits 13, 21 integrate a difference signal and a sum signal in two areas of the image pickup element 3, respectively. After the integration has been executed a few times, when the output of 21 attains to a prescribed value, or becomes the longest reset time, the sample holding circuit 14 holds the output of the integrating circuit 13, and resets the integrating circuits 13, 21 through the delay circuit 17. The focusing is controlled in accordance with the hold value.
JP3123580A 1979-09-27 1980-03-12 Incident position detector of luminous flux Granted JPS56126813A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP3123580A JPS56126813A (en) 1980-03-12 1980-03-12 Incident position detector of luminous flux
US06/190,454 US4384199A (en) 1979-09-27 1980-09-24 Incident position detector for radiation beam
DE19803036343 DE3036343A1 (en) 1979-09-27 1980-09-26 DETECTOR DEVICE FOR DETECTING RADIATION BANDS

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3123580A JPS56126813A (en) 1980-03-12 1980-03-12 Incident position detector of luminous flux

Publications (2)

Publication Number Publication Date
JPS56126813A true JPS56126813A (en) 1981-10-05
JPH0213763B2 JPH0213763B2 (en) 1990-04-05

Family

ID=12325734

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3123580A Granted JPS56126813A (en) 1979-09-27 1980-03-12 Incident position detector of luminous flux

Country Status (1)

Country Link
JP (1) JPS56126813A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6087576A (en) * 1983-10-19 1985-05-17 Matsushita Electric Ind Co Ltd Automatic focus control device of video camera
JPS6087577A (en) * 1983-10-19 1985-05-17 Matsushita Electric Ind Co Ltd Automatic focus control device of video camera

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4898826A (en) * 1972-03-29 1973-12-14
JPS54154382A (en) * 1978-05-25 1979-12-05 Canon Inc Photo sensor device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4898826A (en) * 1972-03-29 1973-12-14
JPS54154382A (en) * 1978-05-25 1979-12-05 Canon Inc Photo sensor device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6087576A (en) * 1983-10-19 1985-05-17 Matsushita Electric Ind Co Ltd Automatic focus control device of video camera
JPS6087577A (en) * 1983-10-19 1985-05-17 Matsushita Electric Ind Co Ltd Automatic focus control device of video camera

Also Published As

Publication number Publication date
JPH0213763B2 (en) 1990-04-05

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