Lens with adjustable focal length
AssigneeNational Tsing Hua University
InventorsJer-Liang Andrew Yeh, Chih-Cheng Cheng, Chia-Ming Chang
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Abstract
A lens device with an adjustable focal length is provided. The lens device includes a non-conductive liquid droplet, which is surrounded by air or immiscible liquids. The non-conductive liquid droplet is placed on a bottom plate. The bottom plate includes a set of first electrodes. The set of first electrodes is disposed in such a way that the set of first electrodes are capable of being selectively biased to respectively create a first voltage potential difference between the liquid droplet and each of the set of first electrodes. With the first voltage potential differences, a dielectric force is induced, and the profile of the non-conductive liquid droplet is adjustable. Thus, the focal length of the lens is adjustable.
Claims5
A lens device comprising:
- a chamber filled with a first liquid and a droplet of a second liquid, the first liquid and the second liquid being immiscible to each other, the first liquid and the second liquid being non-conductive and having different dielectric constants;
- and
- a set of electrodes for generating an electric field, the curvature of an interface between the first liquid and the droplet of the second liquid being controlled by a dielectric force induced by the different dielectric constants under the electric field such that a focal length of the lens device is adjustable.
Dependencies are inferred from the claim text.