| 摘要 |
PROBLEM TO BE SOLVED: To provide a transmission screen using a lenticular lens sheet capable of preventing external light from irregularly being reflected by a screen surface, preventing the contrast from decreasing owing to external light within a practical field angle, and further preventing mirroring even when the lenticular lens sheet is molded out of a thermoplastic resin containing a light diffusion material by extrusion. SOLUTION: The lenticular lens sheet 1 is formed by an incident-light side molding roll 43 which forms an incident-light side lenticular lens surface and a projection-light side molding roller 44 which forms black stripes and a lenticular lens surface from a lenticular lens sheet base material 42 extruded by an extruder 41 of an extrusion molding machine. At this point, a black-stripe forming surface 3a-a and a lenticular lens forming surface 2a-a of the projection-light side molding roll 44 are finished into specular surfaces without having fine irregularities. COPYRIGHT: (C)2004,JPO
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