Patent ID: 7775669

Claim:
An illumination system, comprising: a first integrator, having a first light incident end and a first light exit end opposite to each other; a first dichroic element, disposed at a part adjacent to the first light incident end; a second dichroic element, disposed at another part adjacent to the first light incident end, wherein the first dichroic element, the second dichroic element, and the first light incident end are arranged along a triangular track; a first light source, disposed adjacent to the first dichroic element for emitting a first color light; and a second light source, disposed adjacent to the second dichroic element for emitting a second color light, wherein the first color light passes through the first dichroic element and is partially reflected by the second dichroic element to the first light incident end, and the second color light passes through the second dichroic element and is partially reflected by the first dichroic element to the first light incident end.