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 moving in opposing directions and controlling light quantity passing through the opening; and a driving lever connected to the set of blades and driving the set of blades by rotation of the driving lever. The driving lever rotates within degrees centering on a phantom line A passing through a rotational center of the driving lever and being parallel with the moving directions of the blades.
Claims6
A light quantity control device comprising:
- a bottom board having an opening;
- a set of blades linearly moving in opposing directions and controlling light quantity passing through the opening;
- and
- a driving lever connected to the set of blades and driving the set of blades by rotation of the driving lever,
- wherein the driving lever rotates within 90 degrees centering on a phantom line passing through a rotational center of the driving lever and being parallel with the moving directions of the blades.
A light quantity control device comprising:
- a bottom board having an opening;
- a set of blades linearly moving in opposing directions and controlling light quantity passing through the opening;
- and
- a driving lever connected to the set of blades and driving the set of blades by rotation of the driving lever,
- wherein the driving lever stops at least one partway position between one end and the other end of a rotational range thereof the driving lever, and the driving lever lies within 90 degrees centering on a phantom line passing through a rotational center of the driving lever and being parallel with the moving directions of the blades.
Dependencies are inferred from the claim text.