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US 2008/0174889 A1Published application
Optical focusing device
AssigneeIndustrial Technology Research Institute
InventorsHan-Wei Su, Chao-Chang Hu
Life of this patent
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Abstract
This invention discloses an optical focusing device including a body, a sleeve pivotally connected to the body, a lens screwedly engaged with the sleeve, and a piezoelectric actuator fixedly disposed in the body for contacting and driving the sleeve to rotate. The body and the lens are provided with first and second guiding portions respectively for positioning and sliding, so as to drive the sleeve to rotate and thereby actuate focusing of the lens. The optical focusing device is structurally simple and configured to increase a driving force.
Claims33
An optical focusing device, comprising:
- a body having first and second receiving spaces adjoining one another, an aperture allowing the first receiving space to communicate with the outside, first guiding portions adjoining the first receiving space, and a pivot portion positioned in the second receiving space;
- a sleeve pivotally connected to the pivot portion in the second receiving space and formed with a first screwing portion;
- a lens disposed in the first receiving space, formed with a second screwing portion for screwed engagement with the first screwing portion, provided with second guiding portions slidable to and secured in position to the first guiding portions, and moved axially in response to rotation of the sleeve;
- and
- a piezoelectric actuator fixed to the body and touching the outer surface of the sleeve, so as to generate a rotational force for rotating the sleeve and making the lens focus.
2 more elements
Dependencies are inferred from the claim text.