Exposure control system for a camera

Details Exposure control system for a camera Exposure control system for a camera

1975-09-30

1977-03-08

Adams, Jr., Russell E.

354 36, 354 60R, G03B 708

Patent

active

040115690

ABSTRACT:
An exposure control system for a camera of the type provided with shutter preselection and diaphragm preselection automatic exposure ranges and with a manual exposure range. A switching arrangement responds to a selected range by selectively establishing one of three possible combinations of channels. These transmit photographic analog information from exposure control parameter setting means, which include means for preselection of a desired shutter time and/or diaphragm aperture to exposure determining means which have shutter and diaphragm control means, either directly or through a computer circuit. This switching arrangement is rendered less susceptible to and adapted for incorporation in a semiconductor device with integrated circuits normalized for various types of cameras including the type having an individual single exposure range and is amenable to relatively low cost unit production techniques.

REFERENCES:
patent: 3829867 (1974-08-01), Ono
patent: 3882511 (1975-05-01), Tsujimoto et al.
patent: 3896472 (1975-07-01), Yoshiyama et al.
patent: 3899789 (1975-08-01), Taguchi et al.
patent: 3945024 (1976-03-01), Hasegawa et al.

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