| 摘要 |
<p>Concave-shaped projection screen of great light gain, the light reflexion capacity of which is much greater than the screens currently used because, instead of the silver surface usually used as well as the screen's structural support (1), two pellicles with very different action are used. One (2) is slightly translucent and produces, almost without light absorption, the scattering of the light that passes through it, due to the micrometrical irregularity of its surface. The second one (3), which is completely mirrored, recedes the light in the opposite direction and, by crossing the first pellicle, scatters the light a bit more. Since the pellicles are thin, they can be adhesive, and the first one can also have other characteristics such as a fluted surface, in order to make the light diverge more on a horizontal level than a vertical level, since there is no use in wasting light on the ceiling or the floor.</p> |
