| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an inexpensive short focus type reflection screen having an excellent contrast for absorbing only external rays of light by a pigmented layer, and for efficiently projecting video rays of light. <P>SOLUTION: A reflection screen includes at least: a lens layer having a Fresnel lens shape for converting video rays of light projected from a video light source into almost parallel rays of light facing to an almost normal direction of a screen surface, and for emitting the rays of light; a pigmented layer arranged on the video light emission side of the lens layer; and a low refractive index layer arranged on the video light emission side of the pigmented layer so as to be brought into contact with the interface of the pigmented layer, and made of materials having a refractive index which is lower than that of the pigmented layer. <P>COPYRIGHT: (C)2013,JPO&INPIT |
