Optical apparatus including diaphragm device
First Claim
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1. A lens apparatus comprising:
- a lens barrel;
an image-capturing optical system; and
a diaphragm device disposed in an optical path of the image-capturing optical system,wherein the diaphragm device includes,a plurality of diaphragm blades, andan electroactive polymer actuator configured to move the plurality of diaphragm blades from a diaphragm-open state to a diaphragm-closed state and from a diaphragm-closed state to a diaphragm-open state,wherein the electroactive polymer actuator is a two-phase electroactive polymer actuator, andwherein when the two-phase electroactive polymer actuator is in a non-conductive state, the plurality of diaphragm blades is kept at an intermediate diaphragm position.
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Abstract
A lens apparatus includes a lens barrel, an image-capturing optical system, and a diaphragm device disposed in an optical path of the image-capturing optical system. The diaphragm device includes a plurality of diaphragm blades and an electroactive polymer actuator configured to move the plurality of diaphragm blades from a diaphragm-open state to a diaphragm-closed state and from a diaphragm-closed state to a diaphragm-open state.
9 Citations
2 Claims
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1. A lens apparatus comprising:
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a lens barrel; an image-capturing optical system; and a diaphragm device disposed in an optical path of the image-capturing optical system, wherein the diaphragm device includes, a plurality of diaphragm blades, and an electroactive polymer actuator configured to move the plurality of diaphragm blades from a diaphragm-open state to a diaphragm-closed state and from a diaphragm-closed state to a diaphragm-open state, wherein the electroactive polymer actuator is a two-phase electroactive polymer actuator, and wherein when the two-phase electroactive polymer actuator is in a non-conductive state, the plurality of diaphragm blades is kept at an intermediate diaphragm position. - View Dependent Claims (2)
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Specification
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Current AssigneeCanon Kabushiki Kaisha (Canon Inc.)
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Original AssigneeCanon Kabushiki Kaisha (Canon Inc.)
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InventorsOgino, Shigeru, Iwasaki, Youichi
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Primary Examiner(s)WHITTINGTON, KENNETH
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Application NumberUS11/464,747Publication NumberTime in Patent Office1,176 DaysField of Search396/449, 396/450, 396/451, 396/458, 396/460, 396/505, 396/507, 396/509, 359/739, 348/362, 348/363, 310/309, 310/328, 310/800US Class Current396/505CPC Class CodesG03B 9/06 Two or more co-operating pi...G03B 9/07 with means for presetting t...G03B 9/14 Two separate members moving...
