JPS57172331A - Exposure confirming system using focusing detector - Google Patents

Exposure confirming system using focusing detector

Info

Publication number
JPS57172331A
JPS57172331A JP56057451A JP5745181A JPS57172331A JP S57172331 A JPS57172331 A JP S57172331A JP 56057451 A JP56057451 A JP 56057451A JP 5745181 A JP5745181 A JP 5745181A JP S57172331 A JPS57172331 A JP S57172331A
Authority
JP
Japan
Prior art keywords
exposure
unit
luminous flux
focusing
detection
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
JP56057451A
Other languages
Japanese (ja)
Inventor
Mitsuya Hosoe
Takao Kinoshita
Masayoshi Yamamichi
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 JP56057451A priority Critical patent/JPS57172331A/en
Priority to US06/368,433 priority patent/US4429966A/en
Priority to DE19823214063 priority patent/DE3214063A1/en
Publication of JPS57172331A publication Critical patent/JPS57172331A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B7/00—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly
    • G03B7/08—Control effected solely on the basis of the response, to the intensity of the light received by the camera, of a built-in light-sensitive device
    • G03B7/099—Arrangement of photoelectric elements in or on the camera

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Exposure Control For Cameras (AREA)
  • Focusing (AREA)
  • Indication In Cameras, And Counting Of Exposures (AREA)
  • Automatic Focus Adjustment (AREA)

Abstract

PURPOSE:To confirm the exposure operation of a camera, by leading a part of the luminous flux, which comes from an object during the exposure of a film, onto a photoelectric converter of a focusing detector to detect the luminous flux. CONSTITUTION:For example, a photodetecting unit 31 is provided in a single- lens reflex camera main body 25, and the unit 31 receives the incident luminous flux of a lens 24 through a quick return mirror 27a and is used for the detection of the focusing state. Further, the unit 31 is constituted so as to receive the reflection light from a film 34 at an exposure time. When the focusing processing is performed and the exposure is performed, an electric charge corresponding to the quantity of receiving light is integrated in a signal processing circuit 32 in respect to the detection light of the unit 31, and the integration holding value is compared with a reference voltage to indicate whether the exposure is proper or not. Thus, the photodetecting unit for focus detection is switched and used to confirm whether a diaphragm controlling system and a shutter are operated surely or not.
JP56057451A 1981-04-16 1981-04-16 Exposure confirming system using focusing detector Pending JPS57172331A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP56057451A JPS57172331A (en) 1981-04-16 1981-04-16 Exposure confirming system using focusing detector
US06/368,433 US4429966A (en) 1981-04-16 1982-04-14 Camera with photoelectric focus detecting device
DE19823214063 DE3214063A1 (en) 1981-04-16 1982-04-16 CAMERA WITH A PHOTOELECTRIC FOCUS DETECTOR

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56057451A JPS57172331A (en) 1981-04-16 1981-04-16 Exposure confirming system using focusing detector

Publications (1)

Publication Number Publication Date
JPS57172331A true JPS57172331A (en) 1982-10-23

Family

ID=13056023

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56057451A Pending JPS57172331A (en) 1981-04-16 1981-04-16 Exposure confirming system using focusing detector

Country Status (1)

Country Link
JP (1) JPS57172331A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59140429A (en) * 1983-02-01 1984-08-11 Canon Inc Camera used together with flash light emitting device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59140429A (en) * 1983-02-01 1984-08-11 Canon Inc Camera used together with flash light emitting device

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