Apparatus for determining amount of flash

Details Apparatus for determining amount of flash Apparatus for determining amount of flash

1986-12-31

1988-09-06

Hix, L. T.

354414, 354416, 354431, G03B 700

Patent

active

047696664

ABSTRACT:
An apparatus for determining the amount of flash having a first light receiving element for measuring light with respect to a first region (central region) of the frame, a second light receiving element for measuring light with respect to a second region (marginal region). The apparatus determines the amount of flash in accordance with the ratio of the outputs per unit area of the first and second light receiving elements.

REFERENCES:
patent: 3836920 (1974-09-01), Uchiyama et al.
patent: 3855601 (1974-12-01), Uchiyama et al.
patent: 4005444 (1977-01-01), Uchiyama et al.
patent: 4063257 (1977-12-01), Mashimo et al.
patent: 4188104 (1980-02-01), Uchiyama et al.
patent: 4456353 (1984-06-01), Mizokami

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