JPS57154207A - Focus detecting device of camera - Google Patents

Focus detecting device of camera

Info

Publication number
JPS57154207A
JPS57154207A JP3908381A JP3908381A JPS57154207A JP S57154207 A JPS57154207 A JP S57154207A JP 3908381 A JP3908381 A JP 3908381A JP 3908381 A JP3908381 A JP 3908381A JP S57154207 A JPS57154207 A JP S57154207A
Authority
JP
Japan
Prior art keywords
signal
focus
camera
gate
exposed
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
JP3908381A
Other languages
Japanese (ja)
Inventor
Shinji Sakai
Nobuhiko Shinoda
Masayoshi Yamamichi
Mitsuya Hosoe
Takashi Kawabata
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 JP3908381A priority Critical patent/JPS57154207A/en
Publication of JPS57154207A publication Critical patent/JPS57154207A/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
    • G02B7/36—Systems for automatic generation of focusing signals using image sharpness techniques, e.g. image processing techniques for generating autofocus signals

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Focusing (AREA)
  • Automatic Focus Adjustment (AREA)

Abstract

PURPOSE:To detect a focus of a camera with high reliability, by holding and displaying a focus detecting output provided immediately before a film is exposed. CONSTITUTION:When an SW2 signal is H, that is to say, in case of a non- exposure state, whenever an updating clock sent from a timing generator TMGE is received, an AND gate 49 sends a signal synchronizing with said clock, to an FF50, and supplies a display signal corresponding to a photographing lens focusing state to a displaying circuit DISP by updating a data from an operating circuit CPU. When the SW2 is L, that is to say, when a film is exposed, a pulse from the AND gate 49 is cut off, therefore, the FF50 holds its previous signal from the CPU, and fixedly holds its display signal. In this way, the focus is detected with high reliability.
JP3908381A 1981-03-17 1981-03-17 Focus detecting device of camera Pending JPS57154207A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3908381A JPS57154207A (en) 1981-03-17 1981-03-17 Focus detecting device of camera

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3908381A JPS57154207A (en) 1981-03-17 1981-03-17 Focus detecting device of camera

Publications (1)

Publication Number Publication Date
JPS57154207A true JPS57154207A (en) 1982-09-24

Family

ID=12543192

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3908381A Pending JPS57154207A (en) 1981-03-17 1981-03-17 Focus detecting device of camera

Country Status (1)

Country Link
JP (1) JPS57154207A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5966235U (en) * 1982-10-26 1984-05-02 京セラ株式会社 Autofocus camera with remote control

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5966235U (en) * 1982-10-26 1984-05-02 京セラ株式会社 Autofocus camera with remote control

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