Peristrophic multiplexed holograms recorded in a low toxicity photopolymer

Abstract

Multiplexed diffraction gratings were recorded in 300 μm thick layers of biophotopol photopolymer by using two peristrophic multiplexing schemes separately and in combination. In addition, it was shown that riboflavin may be used as polymer initiator in acrylamide photopolymer films and the holographic properties of these films such as diffraction efficiency and dynamic range were compared with those of the biophotopol photopolymer. A variable exposure scheduling method was adopted to store the gratings using a 488 nm Ar laser. Thirteen nearly uniform sinusoidal wave gratings could be recorded in a low toxicity recording medium with a variable exposure energy scheduling method. The diffraction efficiency and dynamic range obtained using the two multiplexing schemes were compared.