Electronic exposure control apparatus for cameras

Details Electronic exposure control apparatus for cameras Electronic exposure control apparatus for cameras

Filed on

1976-09-28

Date issued

1978-05-16

Examiner

Adams, Russell E.

Other Related Categories

354 23D, 354 50, 354 60R, 354 60A, G03B 708

Type

Patent

Status

active

Patent number

040902080

Description

ABSTRACT:
In the camera exposure control apparatus disclosed, a light sensor produces a first analog signal corresponding to the brightness of an object to be photographed. This signal is compared to a gradually varying second analog signal. The variation of the second analog signal is discontinued when the first and second signals reach a predetermined relationship and the second analog signal is stored. As the aperture of the camera's diaphragm is varied, the stored signal is compared with an analog signal corresponding to the diaphragm opening to produce a control signal that inhibits aperture variation when the latter compared signals reach a predetermined relationship.

REFERENCES:
patent: 3703130 (1972-11-01), Watanabe
patent: 3824608 (1974-07-01), Toyoda
patent: 3842587 (1974-10-01), Strauss et al.

Affiliated with

Also associated with

Rating

Electronic exposure control apparatus for cameras does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1200340