发明申请
US20120224842A1 FOCAL-PLANE SHUTTER AND OPTICAL INSTRUMENT 有权
FOCAL-PLANE SHUTTER和OPTICAL INSTRUMENT

FOCAL-PLANE SHUTTER AND OPTICAL INSTRUMENT
摘要:
A focal plane shutter includes: a board including an opening; an arm including: a rear end portion rotatably supported by the board; and a front end portion swingable in response to rotation of the rear and portion; blades coupled to the arm for opening and closing the opening; and a sensor arranged at a position opposite to the arm across the opening, and detecting a state of the blades.
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