JPS5773708A - Automatic focusing photographic device - Google Patents
Automatic focusing photographic deviceInfo
- 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
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.
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61119116U (en) * | 1985-01-11 | 1986-07-28 |
Citations (2)
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 |
-
1980
- 1980-10-27 JP JP15038080A patent/JPS5773708A/en active Pending
Patent Citations (2)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61119116U (en) * | 1985-01-11 | 1986-07-28 |
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