A simple holographic technic for fabricating a LC/polymer switchable Fresnel lensH. Nemati, E. Mohajerani, A. Moheghi, M. Behzadi Rad and N. Hosain Nataj
Laser Research Institute, Shahid Beheshti University - G.C. Evin, Tehran, Iran
received 29 July 2009; accepted in final form 3 September 2009; published September 2009
published online 5 October 2009
In this article, we report on a novel technique for fabricating an electrically switchable Fresnel lens made from liquid-crystal–polymer composite. The Fresnel pattern is formed by means of interference between two planar and spherical wavefronts reflected from a single plano-convex lens. The simplicity of the procedure and capability to fabricate different focal lengths with the same arrangement are the unique advantages of this technique.
42.40.Eq - Holographic optical elements; holographic gratings.
42.70.Df - Liquid crystals.
42.70.Ln - Holographic recording materials; optical storage media.
© EPLA 2009