JPS5752009A - Automatic focusing device - Google Patents

Automatic focusing device

Info

Publication number
JPS5752009A
JPS5752009A JP9220381A JP9220381A JPS5752009A JP S5752009 A JPS5752009 A JP S5752009A JP 9220381 A JP9220381 A JP 9220381A JP 9220381 A JP9220381 A JP 9220381A JP S5752009 A JPS5752009 A JP S5752009A
Authority
JP
Japan
Prior art keywords
engagement
spring
signal
focus
engagement pawl
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.)
Pending
Application number
JP9220381A
Other languages
Japanese (ja)
Inventor
Tatsuya Taguchi
Akio Sunochi
Soichi Nakamoto
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 JP9220381A priority Critical patent/JPS5752009A/en
Publication of JPS5752009A publication Critical patent/JPS5752009A/en
Pending 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)

Abstract

PURPOSE:To simplify mechanism by generating a prescribed signal when the movement position of an optical system coincides with the position of a distance zone expressed by a zone signal and by stopping the movement of the optical system in response to the signal. CONSTITUTION:The projecting arm part of a focus lever 10 for making a photographic lens 2 come out by the operating force of a spring 13 is provided with one engagement pawl 11 and (n)-number of engagement pawls 12 as many as photodetecting elements 71-7n of a photodetector 7. The 1st engagement laver 14 for detaining the photographic lens 2 at an infinite-distance in-focus position against the force of the spring 13 by engaging with the engagement pawl 11 of a focus lever 10 is pivoted freely turnably on a fixed pin 15, and further energized by a spring 16 to turn clockwise, i.e. in the direction wherein it engages with the engagement pawl 11 of the focus lever 10.
JP9220381A 1981-06-17 1981-06-17 Automatic focusing device Pending JPS5752009A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9220381A JPS5752009A (en) 1981-06-17 1981-06-17 Automatic focusing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9220381A JPS5752009A (en) 1981-06-17 1981-06-17 Automatic focusing device

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP7437881A Division JPS5716305A (en) 1981-05-18 1981-05-18 Distance detector

Publications (1)

Publication Number Publication Date
JPS5752009A true JPS5752009A (en) 1982-03-27

Family

ID=14047882

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9220381A Pending JPS5752009A (en) 1981-06-17 1981-06-17 Automatic focusing device

Country Status (1)

Country Link
JP (1) JPS5752009A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6156832U (en) * 1984-09-18 1986-04-16

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6156832U (en) * 1984-09-18 1986-04-16

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