Apparatus for uniformly illuminating a light valve

摘要: A light energy efficient and low cost optical system for providing uniform illumination of a valve. The source is an extended generally emitting non-uniform spatial distribution power. focused into the entrance end transmitting tunnel having reflecting interior wall surfaces cross sectional length dimensions chosen to deliver, at exit tunnel, which substantially power distribution, over surface area end, due multiple reflections from walls. exiting advantageously used uniformly illuminate invention includes combination mirrors arranged about most effectively collect direct light.