Nidec Copal Corporation

Toshihiro Nishimura

Koji Sawanobori

A camera diaphragm device in which two diaphragm blades, that is, first and second diaphragm blades having respective first and second diaphragm aperture portions whose diameters differ from each other is provided. The diaphragm blades are mounted to blade mounting shafts provided close to each other and in a standing manner, and are separately reciprocatingly rotated by driving pins of respective rotors. When the diaphragm device is set in a minimum diaphragm aperture control state, not only is the first diaphragm blade having the first aperture portion for restricting the minimum diaphragm aperture moved to an aperture portion, but also the second diaphragm blade having the second aperture portion for restricting an intermediate diaphragm aperture is moved to the aperture portion from the same direction. An area of the aperture portion that cannot be covered by only the first diaphragm blade is covered by the second diaphragm blade.

Growing community of inventors

Kita-ku, Japan

Toshihiro Nishimura