Blue Phase LC/Polymer Fresnel Lens Fabricated by Holographics

Abstract—A novel fabrication method using holographic expo-sure for switchable blue phase (BP) liquid crystal (LC)/polymer Fresnel lens was demonstrated. The Fresnel pattern can be achieved by interfering a planar and a spherical wave fronts with a 532-nm laser. The BPLC/polymer Fresnel lens can thus be fabricated without photo mask and controlled with a simpler driving compared with the conventional LC Fresnel lens. Index Terms—Blue phase liquid crystal, Fresnel lens, holo-graphic optical elements. I