Automatic diaphragm control

Details Automatic diaphragm control Automatic diaphragm control

1977-12-21

1979-03-27

Gellner, Michael L.

G03B 708

Patent

active

041463188

ABSTRACT:
A process for controlling the closure of a diaphragm includes measuring the light intensity with the diaphragm fully open and memorizing a value related to the correct diaphragm opening. The diaphragm is then progressively closed while sensing the intantaneous light value. The memorized and instantaneous values are compared to determined proper diaphragm opening.

REFERENCES:
patent: 4015198 (1977-03-01), Imashita et al.

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