Light quantity control device
AssigneeSeiko Precision Inc.
InventorsPhichet Numnual, Takashi Nakano, Makoto Mikami
Life of this patent
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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.
Claims16
A light quantity control device comprising:
- a bottom board having an opening;
- a set of blades 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,
- wherein 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.
Dependencies are inferred from the claim text.