Patent ID: 8976435
Filing Date: 2015-03-10
Classification: G03B

Abstract:
1. A light quantity adjustment apparatus, comprising: a first substrate comprising a first light-path aperture and a plurality of concave guide grooves; a second substrate comprising a second light-path aperture; a plurality of diaphragm blades comprising a plurality of first protrusions, and disposed between the first substrate and the second substrate to adjust a quantity of light passing through the first light-path aperture and the second light-path aperture; a first guide plate made of a resin film, disposed between the first substrate and the plurality of diaphragm blades, and comprising a plurality of plate guide through holes; a driving ring that opens and closes the plurality of diaphragm blades; and a driving unit configured to rotate the driving ring by a predetermined rotation angle, wherein the plurality of first protrusions is configured to fit into the plurality of concave guide grooves and the plurality of plate guide through holes to guide the plurality of diaphragm blades in an open/close direction, and the plurality of plate guide through holes of the first guide plate has a width which is narrower than a width of the plurality of concave guide grooves of the first substrate.