| 摘要 |
PROBLEM TO BE SOLVED: To provide an inexpensive transmission type screen capable of effectively preventing the occurrence of moire by easy pitch setting without depending on a means using a dispersing agent or a spacer. SOLUTION: The transmission type screen is constituted of a microlens sheet having a microlens array part constituted by two-dimensionally arraying unit lenses nearly in matrix on one surface of a base plate, and a Fresnel lens having cyclic structure consisting of cyclic zones in concentric circle shape. The microlens sheet is constituted to have the microlens array part constituted by closely arraying the unit lenses in a honeycomb state on one surface of a light transmissive base plate, and the unit lens is formed so that the contour of its outside shape may be an almost regular hexagon and its array pitch may be equal to or under the cycle of the cyclic zones of the Fresnel lens. COPYRIGHT: (C)2004,JPO
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