16 May 2007 Smart lens: tunable liquid lens for laser tracking
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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.
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Fan-Yi Lin, Fan-Yi Lin, Li-Yu Chu, Li-Yu Chu, Yu-Shan Juan, Yu-Shan Juan, Sih-Ting Pan, Sih-Ting Pan, Shih-Kang Fan, Shih-Kang Fan, } "Smart lens: tunable liquid lens for laser tracking", Proc. SPIE 6584, Adaptive Optics for Laser Systems and Other Applications, 65840D (16 May 2007); doi: 10.1117/12.722760; https://doi.org/10.1117/12.722760
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