22 April 1996 Novel photopolymer system for holograms
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A novel photopolymer system, which is capable of producing high diffraction efficiency in volume phase holograms, is reported. This photopolymer system consists primarily of bisphenol-type epoxy resin and radically polymerizable aliphatic monomer with diphenyliodonium salt and 3,3'-carbonylbis (7-diethylaminocoumarin) as a complex initiator. The chemistry of imaging formation is based on the radical polymerization of the monomer initiated by a holographic exposure, followed by the cationic polymerization of epoxy resin by heat treatment. Then, radical species and cations are provided through a photocomposition of diphenyliodonium salt.
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Hiromitsu Ito, Hiromitsu Ito, Yasushi Ohe, Yasushi Ohe, Niro Watanabe, Niro Watanabe, } "Novel photopolymer system for holograms", Proc. SPIE 2688, Holographic Materials II, (22 April 1996); doi: 10.1117/12.238532; https://doi.org/10.1117/12.238532

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