BACK PROJECTION TYPE SCREEN, METALLIC MOLD FOR MOLDING LENTICULAR LENS SHEET AND METHOD FOR MOLDING LENTICULAR LENS SHEET

摘要

PROBLEM TO BE SOLVED: To provide a back projection type screen having excellent orientation characteristics and resolution by using a fine-pitch lenticular lens sheet. SOLUTION: This back projection type screen is constituted of a Fresnel lens sheet arranged on a light source side and the lenticular lens sheet arranged on a observation side. On the screen, a lenticular lens 21 is formed on a light incident side on the lenticular lens sheet 2, and the surface on a light emitting side thereof is a mirror surface 21. As for the lens 21; the arraying pitch (P) of a lens unit 211 is within 0.05 to 0.3 mm and an angle (θ) formed by the lens units 24 at the boundary of the adjacent lens units 24 is within 35 to 60 deg..