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Optical Engineering

Adaptive liquid iris for optical switch
Author(s): Lei Li; Qiong-Hua Wang; Chao Liu; Ming-Huan Wang
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Paper Abstract

An adaptive liquid iris for an optical switch based on electrowetting is demonstrated. The device consists of a clear conductive liquid and an opaque insulate oil. In the voltage-off state, the dome of the clear liquid touches the top substrate, and an iris-like opening is formed in its central area, and the aperture of the opening is at its largest. When a voltage is applied to the device, the shape of the conductive liquid is deformed due to the electrowetting effect. As a result, the diameter of the opening is reduced. Our results show that the aperture of the device can be tuned from ∼6.4  mm to 0 as the applied voltage is changed from 0 to ∼60  V . The device can obtain a high optical attenuation (∼8721 ). The response time was measured to be ∼117  ms (shrinking time is ∼25  ms , and relaxing time is ∼92  ms ) with turnaround speed of 55  mm/s . Our device has potential applications in light shutters, variable optical attenuators, adaptive irises, and displays.

Paper Details

Date Published: 28 April 2014
PDF: 5 pages
Opt. Eng. 53(4) 047105 doi: 10.1117/1.OE.53.4.047105
Published in: Optical Engineering Volume 53, Issue 4
Show Author Affiliations
Lei Li, Sichuan Univ. (China)
Chinese Academy of Sciences (China)
Qiong-Hua Wang, Sichuan Univ. (China)
Chao Liu, Sichuan Univ. (China)
Ming-Huan Wang, Sichuan Univ. (China)

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