| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a reflective screen capable of displaying a bright image even when a distance from an image source is short, and to provide a reflective projection system including the reflective screen. <P>SOLUTION: The reflective screen reflects image light projected from an image source 2 to render an image into observable, and comprises: a base layer 11; a Fresnel lens layer 21 disposed in a side of the base layer, the side where the image light is projected; and a reflection layer 24 disposed in the opposite side of the base layer to the side where the image light is projected, and capable of reflecting light. The Fresnel lens layer includes a plurality of concentrically arranged unit optical elements 21 having a predetermined cross-sectional shape and protruding. Each unit optical element has an entrance face 21b that allows the image light to enter the Fresnel lens layer, and a total reflection face 21c that totally reflects the image light entering the entrance face to deflect toward the reflection layer. <P>COPYRIGHT: (C)2013,JPO&INPIT |
