| 摘要 |
<p>A rear projection screen doesn't block the image light and provides a prefect complete mage. The screen includes a Fresnel lens (3, 4), and a cylindrical lens array (2) consisting of a plurality of cylindrical lens elements (5). These elements are independent from each other and in parallel, and arranged closely between adjacent cylindrical lens element (5), so that there are no luminous flux loss therebetween. A strengthening area, which is provided with a rigid reinforced member (6) connecting with cylindrical lens elements on two sides thereof, is formed on the area being from their contact portion to the image-light exist-side surface between adjacent cylindrical lens elements. An ambient light absorbing portion (7) is formed at the image-light exit side in the strengthening area. <IMAGE></p> |
