发明授权
US5040008A Focal-plane shutter 失效
焦平面快门

Focal-plane shutter
摘要:
A focal-plane shutter for a camera includes two shutter blades each of which comprises two opaque plates. At least one of the two plates has a slit and is held at two points by two arms such that the plates move like a pantograph. The arms are pivotally mounted by eccentric pins to provide for adjusting the parallelism of the blades.
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