| 摘要 |
PURPOSE:To obtain a photopolymer composition which shows low light absorption and scattering loss over a wide temperature range, by mixing a specified polymeric substance and a specified polyfunctional (meth)acrylate at a specified ratio with a photopolymerization initiator. CONSTITUTION:A resin composition comprising a polymeric substance (a) free of an unsaturated carbon-carbon bond and having a weight-average MW >=5,000, a polyfunctional acrylate and/or a polyfunctional methacrylate (b) which, when cured by polymerization, has a refractive index which differs from that of said polymeric substance (b) by at most 0.015 and a photopolymerization initiator (c), wherein the composition ratio by weight of said polymeric substance to said polyfunctional acrylate and/or said polyfunctional methacrylate is 20/80-80/20. By using this optical photopolymer composition, an optical waveguide of an optical waveguide loss <=10dB/m, a low-loss holographic lens, a microprism, etc. can be easily obtained.
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