TRANSMISSION TYPE SCREEN AND REAR TYPE PROJECTOR

摘要

PROBLEM TO BE SOLVED: To provide a transmission type screen whose characteristics of the angle of visibility in up-and-down/right-and-left/oblique directions are enhanced with good balance so that the characteristics of the angle of visibility may be more excellent, and also a rear type projector equipped with such an excellent transmission type screen. SOLUTION: The transmission type screen is equipped with a Fresnel lens part where a Fresnel lens is formed on its surface on an emitting surface side and a micro-lens array part which is arranged on the emitting surface side of the Fresnel lens part and where many micro-lenses are formed on its surface on an incident surface side. The micro-lens array part is constituted by rotating what is obtained by arraying the micro-lenses crosswise so that the adjacent micro-lenses come into contact with each other so as to hold their sides in common by 45°. COPYRIGHT: (C)2004,JPO