Electric exposure meter

Details Electric exposure meter Electric exposure meter

1973-11-16

1976-01-13

Smith, Alfred E.

Optics: measuring and testing

Photometers

Integrating

G01J 146

Patent

active

RE0286788

ABSTRACT:
An electric exposure meter for storing the brightness of a photographic object as an electric voltage of a magnitude corresponding thereto in order to control the exposure time by using the voltage thus stored.

REFERENCES:
patent: 2208027 (1940-07-01), Gorlich
patent: 2360082 (1944-10-01), Stone
patent: 2765703 (1956-10-01), Ward et al.
patent: 3049050 (1962-08-01), Thomas
patent: 3063354 (1962-11-01), Matulik et al.
patent: 3111889 (1963-11-01), Quednow
patent: 3147680 (1964-09-01), Stimson
patent: 3418479 (1968-12-01), Schmitt

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