Dai Nippon Printing Co., Ltd.

Sanyo Chemical Industries, Ltd.

Tsutomu Yamashita

Makoto Honda

Futoshi Osawa

Michiharu Okubo

UV-curable Fresnel lens resin compositions �a! comprising a (meth)acrylate containing hydroxyl group and aromatic ring (A1), a urethane group-contining (meth) acrylate (A2) comprising an aromatic diol, an aromatic ringcontaining monofunctional (meth)acrylate (A3), and a photopolymerization initiator (B) and �1b! comprising (A1), a mono- or di(meth)acrylate monomer (A4), and (B), further supplemented with a polyester (C1) comprising an aromatic diol and a phosphate (C2) for the formation of a Fresnel lens on a sheet or plate made of a methyl methacrylate (co) polymer; a Fresnel lens formed by UV cure of composition �1a! or �1b!; and a rear projection screen including a sheet or plate carrying said Fresnel lens. The Fresnel lens has high refractive index, antistatic properties and is satisfactory in adhesion-to a sheet or plate.

UV-curable Fresnel lens resin composition, Fresnel lens, and back

UV-curable Fresnel lens resin compositions �1a! comprising a (meth)acrylate containing hydroxyl group and aromatic ring (A1), a urethane group-containing (meth)acrylate (A2) comprising an aromatic diol, an aromatic ring-containing monofunctional (meth)acrylate (A3), and a photopolymerization initiator (B) and �1b! comprising (A1), a mono- or di(meth)acrylate monomer (A4), and (B), further supplemented with a polyester (C1) comprising an aromatic diol and a phosphate (C2) for the formation of a Fresnel lens on a sheet or plate made of a methyl methacrylate (co)polymer; a Fresnel lens formed by UV cure of composition �1a! or �1b!; and a rear projection screen including a sheet or plate carrying said Fresnel lens. The Fresnel lens has high refractive index, antistatic properties and is satisfactory in adhesion to a sheet or plate.

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Kyoto, Japan

Tsutomu Yamashita