Programmed exposure control system for a camera

Details Programmed exposure control system for a camera Programmed exposure control system for a camera

1978-12-12

1980-07-22

Hix, L. T.

354 43, 354 38, 354 60R, G03B 708

Patent

active

042136822

ABSTRACT:
In a photographic camera having programmed automatic exposure control, a light measuring output is produced by measuring scene light and an exposure value signal is generated in response to the light measuring output. A time value and aperture value signal are automatically varied as a function of the changes in the exposure value signal, which function is adapted to be altered in a predetermined manner by the change in the exposure value signal. The aperture size is determined in response to the size in the aperture value signal and the exposure time is determined in accordance with the time value signal.

REFERENCES:
patent: 3641891 (1972-02-01), Burgarilla
patent: 3765311 (1973-10-01), Nobusawa
patent: 3820131 (1974-06-01), Tanaka
patent: 3821754 (1974-06-01), Nobusawa
patent: 4016574 (1977-04-01), Iwata et al.
patent: 4032935 (1977-06-01), Lermann et al.
patent: 4150889 (1979-04-01), Ueda et al.

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