A simple holographic technic for fabricating a LC/polymer switchable Fresnel lens H. Nemati, E. Mohajerani, A. Moheghi, M. Behzadi Rad and N. Hosain Nataj EPL, 87 6 (2009) 64001 Published online: 05 October 2009 DOI: 10.1209/0295-5075/87/64001