JPS5670535A - Electronic/manual aperture control servo circuit using a moving magnet type servometer as driving source - Google Patents
Electronic/manual aperture control servo circuit using a moving magnet type servometer as driving sourceInfo
- Publication number
- JPS5670535A JPS5670535A JP14720279A JP14720279A JPS5670535A JP S5670535 A JPS5670535 A JP S5670535A JP 14720279 A JP14720279 A JP 14720279A JP 14720279 A JP14720279 A JP 14720279A JP S5670535 A JPS5670535 A JP S5670535A
- Authority
- JP
- Japan
- Prior art keywords
- aperture
- manual
- servometer
- moving magnet
- aperture control
- 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 enable the manual aperture device of a video camera and cinecamera to exercise electric manual aperture control by switching at need by manually driving a moving electromagnet type servometer which exercises automatic aperture control.
CONSTITUTION: With switch SW1 of manual operation part IV placed at manual contact M, variable resistance VR4 is adjusted according to a desired aperture value. The position detection voltage of the moving magnet of the electromagnetic servometer driving the aperture is compared with the voltage that corresponds to the set aperture value by comparator Q2 of servometer driving circuit V. The moving magnet responds to the comparison output to exercise electric manual control over the aperture and manual aperture operation can also be performed by chainging-over the switch according to a shot state.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14720279A JPS5670535A (en) | 1979-11-13 | 1979-11-13 | Electronic/manual aperture control servo circuit using a moving magnet type servometer as driving source |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14720279A JPS5670535A (en) | 1979-11-13 | 1979-11-13 | Electronic/manual aperture control servo circuit using a moving magnet type servometer as driving source |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9106086A Division JPS6236647A (en) | 1986-04-18 | 1986-04-18 | Diaphragm device for camera |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5670535A true JPS5670535A (en) | 1981-06-12 |
Family
ID=15424860
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14720279A Pending JPS5670535A (en) | 1979-11-13 | 1979-11-13 | Electronic/manual aperture control servo circuit using a moving magnet type servometer as driving source |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5670535A (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5869828U (en) * | 1981-11-04 | 1983-05-12 | 株式会社タムロン | Servometer driven diaphragm device |
JPS58134625A (en) * | 1982-02-04 | 1983-08-10 | Nippon Seimitsu Kogyo Kk | Controller for stopping brade of camera |
JPS58154972A (en) * | 1982-03-10 | 1983-09-14 | Hitachi Ltd | Detector for aperture of video camera |
JPS58172269U (en) * | 1982-05-10 | 1983-11-17 | キヤノン株式会社 | TV camera aperture control device |
JPS58175515U (en) * | 1982-05-18 | 1983-11-24 | 日本電産コパル株式会社 | Shooting aperture control device |
JPS59172629A (en) * | 1983-03-23 | 1984-09-29 | Nippon Seimitsu Sokki Kk | Controller for shutter diaphragm of camera |
JPS59219074A (en) * | 1983-05-27 | 1984-12-10 | Asahi Optical Co Ltd | Aperture device of video camera |
JPS6193778A (en) * | 1984-10-12 | 1986-05-12 | Asahi Seimitsu Kk | Method of controlling aperture of lens for cctv camera |
-
1979
- 1979-11-13 JP JP14720279A patent/JPS5670535A/en active Pending
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5869828U (en) * | 1981-11-04 | 1983-05-12 | 株式会社タムロン | Servometer driven diaphragm device |
JPS58134625A (en) * | 1982-02-04 | 1983-08-10 | Nippon Seimitsu Kogyo Kk | Controller for stopping brade of camera |
JPS58154972A (en) * | 1982-03-10 | 1983-09-14 | Hitachi Ltd | Detector for aperture of video camera |
JPS6338916B2 (en) * | 1982-03-10 | 1988-08-02 | Hitachi Ltd | |
JPS58172269U (en) * | 1982-05-10 | 1983-11-17 | キヤノン株式会社 | TV camera aperture control device |
JPS58175515U (en) * | 1982-05-18 | 1983-11-24 | 日本電産コパル株式会社 | Shooting aperture control device |
JPS59172629A (en) * | 1983-03-23 | 1984-09-29 | Nippon Seimitsu Sokki Kk | Controller for shutter diaphragm of camera |
JPS59219074A (en) * | 1983-05-27 | 1984-12-10 | Asahi Optical Co Ltd | Aperture device of video camera |
JPS6193778A (en) * | 1984-10-12 | 1986-05-12 | Asahi Seimitsu Kk | Method of controlling aperture of lens for cctv camera |
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