| 摘要 |
PROBLEM TO BE SOLVED: To made both of first moire and second moire inconspicuous and to obtain an excellent picture by setting the lens pitch of a Fresnel lens sheet and the lens pitch of a lenticular lens sheet to be values simultaneously satisfying a first and a second specified conditional expressions. SOLUTION: A transmission type screen is constituted by including the Fresnel lens sheet and the lenticular lens sheet. When the pitch of pixels enlarged and projected on a screen is defined as PP, the pitch PF of the Fresnel lens and the pitch PL of the lenticular lens are set to be the values simultaneously satisfying one inequality among the group of the first conditional expressions (numeral 1; n+0.35<PP.|PL-PF|/(PL.PF)<n+0.45, and others) and one inequality among the group of the second conditional expressions (numeral 13; n+0.35<PL/ PF<n+0.45, and others). Provided that (n) shows the optional natural number in the inequalities in the groups of the first and the second conditional expressions.
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