JPS5611441A - Exposure control unit - Google Patents
Exposure control unitInfo
- Publication number
- JPS5611441A JPS5611441A JP8575879A JP8575879A JPS5611441A JP S5611441 A JPS5611441 A JP S5611441A JP 8575879 A JP8575879 A JP 8575879A JP 8575879 A JP8575879 A JP 8575879A JP S5611441 A JPS5611441 A JP S5611441A
- Authority
- JP
- Japan
- Prior art keywords
- pulses
- idle running
- adjusting
- response delay
- generator
- 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
Landscapes
- Exposure Control For Cameras (AREA)
- Diaphragms For Cameras (AREA)
Abstract
PURPOSE: To perform automatic aperture controlling with compensated response delay by adjusting the counting of the pulses generated by way of an aperture control member by making use of the pulses which the control member generates in an idle running region.
CONSTITUTION: When an aperture control member 4 moves, a gear 3 turns cooperatively, and pulses are generated from a pulse generator PC. A predetermined idle running region has been set in the drive member 6 cooperating with this member 4, and until the driving of the idle running region is completed, the member 6 does not contactually touch a drive pin and stopping is not accomplished. When the added value of a predetermined number of adjusting pulse number out of the pulses generated by the generator PC at the idle running and the count value of the pulses generated by the generator PC after the stopping in succession to the counting of said adjusting pulse number coincides with the operated value, an aperature control magnet AP-MG is de-energized to stop the member 4. Hence, the response delay via the magnet AP-MG is beforehand corrected by the adjusting pulses and the automatic aperture adjustment with corrected response delay is accomplished.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8575879A JPS5611441A (en) | 1979-07-06 | 1979-07-06 | Exposure control unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8575879A JPS5611441A (en) | 1979-07-06 | 1979-07-06 | Exposure control unit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5611441A true JPS5611441A (en) | 1981-02-04 |
Family
ID=13867752
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8575879A Pending JPS5611441A (en) | 1979-07-06 | 1979-07-06 | Exposure control unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5611441A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS51124425A (en) * | 1975-04-23 | 1976-10-29 | Canon Inc | Digital control device for camera |
-
1979
- 1979-07-06 JP JP8575879A patent/JPS5611441A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS51124425A (en) * | 1975-04-23 | 1976-10-29 | Canon Inc | Digital control device for camera |
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