| 摘要 |
PCT No. PCT/JP91/01717 Sec. 371 Date Aug. 14, 1992 Sec. 102(e) Date Aug. 14, 1992 PCT Filed Dec. 16, 1991 PCT Pub. No. WO92/11320 PCT Pub. Date Sep. 7, 1992.The invention discloses a composition for forming lens, which contains urethane acrylate prepolymer based on tolylenediisocyanate as a principal material, and further said composition containing brome acrylate at least by 10 to 40 weight %, caprolactone denatured hydroxypivalic acid ester neopentylglycoldiacrylate by 3 to 20 weight %, and bis-(acryloxyethoxy)bisphenol A by 3 to 60 weight %, and refractive index of said cured product being 1.5 or more, further discloses a Fresnel lens using said composition, and a transmission screen 1, in which a Fresnel lens 3 is formed on a base material 2.
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