Patent ID: 7494228
Filing Date: 2009-02-24
Classification: G02B,G03B,H04N

Abstract:
1. A light generating system comprising: an elongated light mixing tunnel having a reflective inner surface for mixing light, the mixing tunnel having a light output opening at a first end of the mixing tunnel; the mixing tunnel having a first opening at a first position along a length of the mixing tunnel for receiving light from at least a first light emitting diode (LED) emitting light of a first color; an angled first dichroic mirror positioned in the mixing tunnel over the first opening that reflects light of the first color in a direction of the first end of the mixing tunnel and passes light from colors other than the first color; and the mixing tunnel having at least a second opening for receiving light from at least a second LED emitting light of a second color different from the first color such that light of the first color and light of the second color are mixed in the mixing tunnel and output at the light output opening.