| 摘要 |
PURPOSE:To raise the density of projected light flux, by placing two paraboloidal reflectors so that reflected light and re-reflected light are all concentrated to a light- penetrated part of one reflector and projected outwards. CONSTITUTION:The two paraboloidal reflectors RB, RF of equal aperture are coupled to each other in the face of each other. A light-penetrated opening is provided in a specific part of the front paraboloidal reflector RF. The focus of both the reflectors are located in the same position F. A light source L is placed on the focus F. Reflection is repeated inside by both the reflectors. As a result, all the light is projected through the light-penetrated port. |
