SELECTIVELY REFLECTING OPTICAL DEVICE

摘要

PROBLEM TO BE SOLVED: To make an environment of a projection screen advantagenous by giving an improved projector, enhancing a contrast ratio of the screen and improving colors. SOLUTION: A selectively reflecting optical device includes the projection screen. The projection screen has a structure constituted so as to selectively reflect only incident light energy of a light wavelength region of the prescribed number of narrow bands. COPYRIGHT: (C)2003,JPO