Patent ID: 7658558
Filing Date: 2010-02-09
Classification: G03B

Abstract:
1. A shutter for an optical apparatus, the shutter having multiple sectors and an operation member, wherein: each of said multiple sectors has a cam opening for engagement and is pivotally provided to open and close a shutter opening; said operation member moves each of said multiple sectors in engagement with said cam opening of each of said multiple sectors; said cam opening of at least one sector that is one of said multiple sectors is formed to change a moving direction of said at least one sector, when said operation member moves said at least one sector to a position to close said shutter opening; said at least one sector has no aperture configured to transverse said shutter opening; and wherein while said operation member is moving in one direction, said multiple sectors move to form a fully open state, a fully closed state, and a small aperture state in this order.