Diaphragm mechanism of a photographic lens

Details Diaphragm mechanism of a photographic lens Diaphragm mechanism of a photographic lens

1979-08-30

1981-04-07

Gonzales, John

G03B 906

Patent

active

042602335

ABSTRACT:
A diaphragm mechanism of a photographic lens comprises a plurality of diaphragm blades defining an aperture opening, a stop-down lever, transmission means for transmitting the movement of the stop-down lever to the diaphragm blades to displace them and determine the aperture opening, and cam means for controlling the amount of displacement of the diaphragm blades for the amount of movement of the stop-down lever.

REFERENCES:
patent: 2949837 (1960-08-01), Baab
patent: 3442194 (1969-05-01), Sho
patent: 3631787 (1972-07-01), Shimizu

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