JPS5773708A - Automatic focusing photographic device - Google Patents

Automatic focusing photographic device

Info

Publication number
JPS5773708A
JPS5773708A JP15038080A JP15038080A JPS5773708A JP S5773708 A JPS5773708 A JP S5773708A JP 15038080 A JP15038080 A JP 15038080A JP 15038080 A JP15038080 A JP 15038080A JP S5773708 A JPS5773708 A JP S5773708A
Authority
JP
Japan
Prior art keywords
motor
circuit
sounding
distance
focus state
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
JP15038080A
Other languages
Japanese (ja)
Inventor
Toshiichi Ichiyanagi
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 JP15038080A priority Critical patent/JPS5773708A/en
Priority to US06/287,698 priority patent/US4402586A/en
Publication of JPS5773708A publication Critical patent/JPS5773708A/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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Automatic Focus Adjustment (AREA)

Abstract

PURPOSE:To improve the certainty of photographing operation of a camera by confirming an in-focus state by a sounding signal inhibited during distance adjusting and focusing operation. CONSTITUTION:Through distance measuring circuits IC2 and IC3, a driving signal generating circuit DSFC, a motor driving circuit MDC, etc., a distance adjustment ring is rotated by a motor M1 inhibited by a motor driving inhibiting circuit MDCP for a prescribed time right after a power source is put to work. Then, the information of the distance adjustment ring is compared with the binary signal of object distance information to perform distance measurement and focusing, and the motor M1 stops. While this motor M1 is in driving operation, the transistor TR16 of a sounding control circuit SCC is turned off through diodes D5-D8 and a resistance 15 forming an OR circuit to inhibit a sounding circuit SMC, and the motor M1 stops to release the inhibition in focusing operation, thereby confirming an in-focus state by sounding. Therefore, a shutter is released securely in the in-focus state to improve the certainty of photographing operation of a camera.
JP15038080A 1980-08-04 1980-10-27 Automatic focusing photographic device Pending JPS5773708A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP15038080A JPS5773708A (en) 1980-10-27 1980-10-27 Automatic focusing photographic device
US06/287,698 US4402586A (en) 1980-08-04 1981-07-28 Focusing system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15038080A JPS5773708A (en) 1980-10-27 1980-10-27 Automatic focusing photographic device

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP3220185A Division JPS6128916A (en) 1985-02-20 1985-02-20 Automatic focusing photographic device

Publications (1)

Publication Number Publication Date
JPS5773708A true JPS5773708A (en) 1982-05-08

Family

ID=15495725

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15038080A Pending JPS5773708A (en) 1980-08-04 1980-10-27 Automatic focusing photographic device

Country Status (1)

Country Link
JP (1) JPS5773708A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61119116U (en) * 1985-01-11 1986-07-28

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53131035A (en) * 1977-04-21 1978-11-15 Bell & Howell Japan Automatic focal point adjusting device
JPS5418730A (en) * 1977-07-12 1979-02-13 Yashica Co Ltd Indicator for automatic focus adjustment

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53131035A (en) * 1977-04-21 1978-11-15 Bell & Howell Japan Automatic focal point adjusting device
JPS5418730A (en) * 1977-07-12 1979-02-13 Yashica Co Ltd Indicator for automatic focus adjustment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61119116U (en) * 1985-01-11 1986-07-28

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