Patent ID: 7085032
Filing Date: 2006-08-01
Classification: G03B,H04N

Abstract:
1. A light regulator comprising: a substrate having an optical aperture and spindles, and a plurality of blade members arranged substantially uniformly around the optical aperture to be overlapped with each other at adjacent edges thereof, and having base end portions free rotationally supported by the spindles and tip portions facing the optical aperture, said blade members including a first blade set at a lower side placement and a second blade set at an upper side placement, said first blade set having at least two first blade members overlapping each other and having the tip portions situated inside an aperture edge of the optical aperture when the first blade members fully close the optical aperture, said second blade set having second blade members overlapping each other with a number same as the first blade members and the tip portions situated outside the aperture edge of the optical aperture within an entire moving range of the second blade members and supported by the substrate, said first and second blade sets being arranged such that one of the second blade members at a bottom of the second blade set is situated above one of the first blade members at a top of the first blade set, said first blade members having the base end portions engaging and overlapping with the tip portions of the corresponding second blade members at a same placement order within an entire moving range of the first blade members, said second blade members moving such that the tip portions thereof move along trajectories without interfering with trajectories of the first blade members at different placement orders.