Mr. Ren-Kai Yang Profile

Ren-Kai Yang

at National Taiwan Univ

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Proceedings Article | 23 August 2017 Paper

Zoom system without moving element by using two liquid crystal lenses with spherical electrode

Ren-Kai Yang, Chia-Ping Lin, Guo-Dung Su

Proceedings Volume 10375, 103750K (2017) https://doi.org/10.1117/12.2274019

KEYWORDS: Zoom lenses, Liquid crystals, Spherical lenses, Optical design

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A traditional zoom system is composed of several elements moving relatively toward other components to achieve zooming. Unlike tradition system, an electrically control zoom system with liquid crystal (LC) lenses is demonstrated in this paper. To achieve zooming, we apply two LC lenses whose optical power is controlled by voltage to replace two moving lenses in traditional zoom system. The mechanism of zoom system is to use two LC lenses to form a simple zoom system. We found that with such spherical electrodes, we could operate LC lens at voltage range from 31V to 53 V for 3X tunability in optical power. For each LC lens, we use concave spherical electrode which provide lower operating voltage and great tunability in optical power, respectively. For such operating voltage and compact size, this zoom system with zoom ratio approximate 3:1 could be applied to mobile phone, camera and other applications.

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