Fresnel Lenses in 90° Twisted-Nematic Liquid Crystals With Optical and Electrical Controllability

This letter presents an optically and electrically controllable Fresnel lens in a 90° twisted-nematic liquid crystal (LC) cell with a photoconductive polymer layer. A dc voltage was applied to the cell irradiated using an interference pattern obtained from a Sagnac interferometer. The dc electric fi...

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Veröffentlicht in:	IEEE photonics technology letters 2016-07, Vol.28 (13), p.1462-1464
Hauptverfasser:	Lin, Shih-Hung, Li, Chien-Yu, Kuo, Chie-Tong, Yeh, Hui-Chen
Format:	Artikel
Sprache:	eng
Schlagworte:	Diffraction Electric fields Fresnel lens Fresnel reflection interferometer Laser beams Lenses Optical refraction Optical variables control photoconductive polymer twisted-nematic liquid crystal
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