| http://www.w3.org/ns/prov#value | - Preferably, the host material is an optically clear polymerized organic material prepared from a thermoplastic polycarbonate resin, such as the carbonate-linked resin derived from bisphenol A and phosgene, which is sold under the trademark, LEXAN???; a polyester, such as the material sold under the trademark, MYLAR???; a poly(methyl methacrylate), such as the material sold under the trademark, PLE
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