Abstract

Nematic liquid crystal is widely used in optical devices such as liquid crystal displays. The optical characteristics of liquid crystal devices (ex, birefringence) can be controlled by applying an electric field because the liquid crystal molecules have electric dipoles. Although indium tin oxide (ITO) is generally employed as the transparent electrode material, ITO needs the rare metal indium and has problems of low electric conductivity and transparency. Our group has proposed a novel control technique of liquid crystal molecular orientation using ultrasound vibration without using ITO [1]. In this report, an optical variable-focus liquid crystal lens using ultrasound was discussed.

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