| 摘要 |
PURPOSE:To make it possible to servo-control the setting of the reduced aperture value, by connecting directly the rotation shaft of the potentiometer and the rotation shaft of the galvanometer to drive the potentiometer by the galvanometer. CONSTITUTION:Galvanometer 2 is fixed to the fixing part of iris diaphragm 1 arranged on the pupil face of the photographic lens of the TV camera. Lever 4 of diaphragm 1 is rotated by deflection of pointer 3 of galvanometer 2 to change the reduced aperture value, rotation shaft 6 of potentiometer 5 is connected to the rotation shaft of galvanometer 2 directly. As a result, potentiometer 5 can be driven by galvanometer, and the set of the reduced aperture value can be servocontrolled. |
