Exposure control circuit for camera

Details Exposure control circuit for camera Exposure control circuit for camera

1977-12-13

1979-03-06

Hix, L. T.

Optics: motion pictures

With automatic diaphragm control

354 42, 354 43, 35460A, 307 85, G03B 708, H02J 100

Patent

active

041427858

ABSTRACT:
Disclosed is a circuit for automatically intermittently sensing adequate ient light conditions and adjusting a cine camera iris for same. The circuit includes an astable multi-vibrator for intermittent switching of power to a Cds cell. Under low light conditions the resistance of the cell becomes great enough to stop the oscillations of the multi-vibrator.

REFERENCES:
patent: 3513332 (1970-05-01), Snyder
patent: 3987461 (1976-10-01), Kondo et al.
patent: 3987462 (1976-10-01), Wagensonner
patent: 3995285 (1976-11-01), Kondo
patent: 4007467 (1977-02-01), Wagensonner et al.
patent: 4050795 (1977-09-01), Wagensonner et al.

Affiliated with

Also associated with

Rating

Exposure control circuit for camera does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Exposure control circuit for camera, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Exposure control circuit for camera will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-919049