Light quantity control device

Details Light quantity control device Light quantity control device

2009-02-10

2010-12-07

Perkey, W. B. (Department: 2862)

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Reexamination Certificate

active

07845866

ABSTRACT:
A light quantity control device includes: a bottom board having an opening; a first blade, a supporting blade, and a second blade linearly moved in opposing directions and controlling the opening to a fully open state, a fully closed state, and a small aperture state; a driving lever connected to the set of blades and driving the set of blades by rotation of the driving lever; and a stopper restricting a rotational range of the driving lever. The set of blades controls the opening to the small aperture state when the driving lever is positioned at one end of the rotational range defined by the stopper.

REFERENCES:
patent: 6086267 (2000-07-01), Tsuzuki et al.
patent: 2006/0039695 (2006-02-01), Naganuma
patent: 5-241224 (1993-09-01), None
patent: 11-190867 (1999-07-01), None
patent: 11-194384 (1999-07-01), None
patent: 11-194387 (1999-07-01), None
patent: 2002-107792 (2002-04-01), None
patent: 2004-109531 (2004-04-01), None
International Search Report for International Application No. PCT/JP2007/065940 dated Nov. 7, 2007.
Chinese Office Action dated Apr. 1, 2010, and English Translation.

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