| 摘要 |
<p>A front projection screen includes a plane base layer forming plural parallel out-ward-protruded annular bars on the light-reflecting side surface thereof. Each bar contains an outside surface (4) facing the projection light source and being a light-reflecting portion, and an outside surface (3) not facing the projection light source and being a stray-light absorbing portion. The two surfaces intersect each other. All bottom interfaces between the bars and the base layer are in a common plane. All outside surfaces (4) of these bars have a common focus point. The outside surface (3) is arranged in such a manner that the outside surface (4) of each bar does not block the projection light incident on the whole outside surface (4) of its adjacent bar. <IMAGE></p> |
