Contrast of diffuse object holograms in PVA-acrylamide photopolymers: real time measurements

Abstract

New holographic recording materials based on photopolymerizable systems have contributed significantly to the recent growth of holographic applications. In this paper we experimentally analyze diffuse-object holograms recorded in a photopolymerizable material. The recording and reconstruction of holograms are in real time without a chemical process and then it is possible to know the performance of these materials when diffuse-object holograms are made and, at the same time, to measure the contrast of them. The holographic images were captured in real time every 10 s and diffraction efficiency and contrast were calculated. In these experiments the influence of the intensity and the beam ratio on these holographic characteristics was analyzed. Our first results show that it is possible to obtain diffuse- object holograms with a diffraction efficiency of 8% and a contrast of 0.93.