Patent ID: 6796728
Filing Date: 2004-09-28
Classification: G03B

Abstract:
A focal plane shutter comprising:a base plate having an exposure aperture; an electromagnetic actuator including: a rotor rotatably supported on said base plate, said rotor having a magnetized part magnetized to different polarities and an output part for outwardly outputting a driving force, said output part being separate from said magnetized part; a yoke around said rotor so as to form a magnetic circuit; and a magnetizing coil wound onto said yoke; a blade pivotably supported on said base plate and connected to said output part of said rotor so as to be operable to open and close said exposure aperture; and an angle adjusting mechanism capable of adjusting a relative mounting angle between at least two of said yoke, said magnetized part of said rotor, and said output part of said rotor around a rotational axis of said rotor, said angle adjusting mechanism including said output part and an adjusting mechanism capable of adjusting a relative angular position between said rotor and said output part.