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Proceedings Paper

Smart lens: tunable liquid lens for laser tracking
Author(s): Fan-Yi Lin; Li-Yu Chu; Yu-Shan Juan; Sih-Ting Pan; Shih-Kang Fan
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Paper Abstract

A tracking system utilizing tunable liquid lens is proposed and demonstrated. Adapting the concept of EWOD (electrowetting-on-dielectric), the curvature of a droplet on a dielectric film can be controlled by varying the applied voltage. When utilizing the droplet as an optical lens, the focal length of this adaptive liquid lens can be adjusted as desired. Moreover, the light that passes through it can therefore be focused to different positions in space. In this paper, the tuning range of the curvature and focal length of the tunable liquid lens is investigated. Droplet transformation is observed and analyzed under a CCD camera. A tracking system combining the tunable liquid lens with a laser detection system is also proposed. With a feedback circuit that maximizing the returned signal by controlling the tunable lens, the laser beam can keep tracked on a distant reflected target while it is moving.

Paper Details

Date Published: 16 May 2007
PDF: 8 pages
Proc. SPIE 6584, Adaptive Optics for Laser Systems and Other Applications, 65840D (16 May 2007); doi: 10.1117/12.722760
Show Author Affiliations
Fan-Yi Lin, National Tsing Hua Univ. (Taiwan)
Li-Yu Chu, National Chiao Tung Univ. (Taiwan)
Yu-Shan Juan, National Tsing Hua Univ. (Taiwan)
Sih-Ting Pan, National Chiao Tung Univ. (Taiwan)
Shih-Kang Fan, National Chiao Tung Univ. (Taiwan)

Published in SPIE Proceedings Vol. 6584:
Adaptive Optics for Laser Systems and Other Applications
Gilles Cheriaux; Chris J. Hooker; Michal Stupka, Editor(s)

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