| 摘要 |
<p>A hollow lighting structure (42) having an optically transmissive light emitting surface (44). At least one light guide (36, 38, 40) extends within the structure. A light source (30, 32, 34) emits light into the light guide. The light guide's light transmissivity is varied as a function of position on the surface of the light guide such that the angular and spatial distribution of light emitted from the light guide yields a predetermined distribution of light intensity as a function of position on the light emitting surface. The predetermined distribution of light intensity is preferably substantially uniform at all points on the light emitting surface.</p> |
