Light quantity adjusting device

Details Light quantity adjusting device Light quantity adjusting device

G - Physics

05

D

341/31, 95/53.5

G05D 25/02 (2006.01) H04N 5/238 (2006.01)

Patent

CA 2031905

A light quantity adjusting device adjusts the quantity of light by moving a light quantity adjusting member by means of an electromagnetic driving part. The device includes a circuit arranged to drive the electro- magnetic driving part by producing a pulse output at a period which is shorter than the time constant of the electromagnetic driving part.

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