| 摘要 |
PROBLEM TO BE SOLVED: To provide a transmission type screen, which is composed of at least a Fresnel lens sheet and a lenticular lens sheet, is formed so as to prevent a stain from occurring on the top of lens in the Fresnel lens sheet caused by such phenomena that lens faces of two lens sheets being mutually vibrated strike and rub each other in transmit when the screen in shipped from a factory. SOLUTION: Both lens sections of the Fresnel lens sheet and the lenticular lens sheet are made of a hardened material such as a resin being set by ultraviolet ray or a resin being set by electron ray, and the Young's modulus of the both hardened resin materials are controlled.
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