Photographic exposure control system utilizing a single photocel

Details Photographic exposure control system utilizing a single photocel Photographic exposure control system utilizing a single photocel

1979-01-24

1980-11-25

Gellner, Michael L.

354 53, 354 60L, 354 60F, 354127, G03B 7097, G03B 7099, G03B 1505, G03B 1720

Patent

active

042355397

ABSTRACT:
A photographic camera apparatus includes an improved exposure and electronic flash fire control system comprising a single photoresponsive element. The system provides a scene brightness measurement prior to a photographic exposure interval, an exposure influencing event during the exposure interval responsive to the photoresponsive element providing an indication of the commencement of the photographic exposure interval and an exposure terminating signal responsive to the photoresponsive element detecting a selected amount of scene light corresponding to the exposing scene light admitted during the exposure interval.

REFERENCES:
patent: 3478660 (1969-11-01), Land
patent: 3628437 (1971-12-01), Fahlenberg
patent: 3942183 (1976-03-01), Whiteside
patent: 3977014 (1976-08-01), Norris
patent: 3997904 (1976-12-01), Schutze et al.
patent: 4001845 (1977-01-01), Maitani et al.
patent: 4023187 (1977-05-01), Shenk
patent: 4040072 (1977-08-01), Johnson et al.
patent: 4064519 (1977-12-01), Kee
patent: 4079389 (1978-03-01), Hashimoto et al.
U.S. Applic. Ser. No. 840,802, 10/77, Muggli.
U.S. Applic. Ser. No. 839,839, 10/77, Johnson.
U.S. Applic. Ser. No. 929,840, 7/78, Johnson.
U.S. Applic. Ser. No. 854,691, 11/77, Johnson.
U.S. Applic. Ser. No. 898,546, 4/78, Biber et al.
U.S. Applic. Ser. No. 919,084, 6/78, Johnson.

Affiliated with

Also associated with

Rating

Photographic exposure control system utilizing a single photocel does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Photographic exposure control system utilizing a single photocel, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Photographic exposure control system utilizing a single photocel will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1127245