Variable close loop controlled aperture/shutter system

Details Variable close loop controlled aperture/shutter system Variable close loop controlled aperture/shutter system

1992-12-22

1994-06-28

Blankenship, Howard B.

G03B 0908

Patent

active

053251423

ABSTRACT:
An electronically actuated shutter in which the location of the shutter blades are known to accurately control the aperture size and exposure. A gradient neutral density strip, a light source and a light detector are used to determine the position of the shutter blades.

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