Patent ID: 8690344

Claim:
An illumination system, comprising: a first light source, providing a first wave band light; a dichroic element, having a first dichroic portion and a second dichroic portion; a wheel plate, having a wave band transforming area and a reflecting area, wherein the first wave band light is reflected to the wheel plate by the first dichroic portion, and when the first wave band light is reflected to the wave band transforming area, the first wave band light is transformed into a second wave band light by the wave band transforming area, and the second wave band light emits through the first dichroic portion and the second dichroic portion, and when the first wave band light is reflected to the reflecting area, the first wave band light is reflected by the reflecting area to emit through the second dichroic portion; and a second light source which provides a third wave band light, and the third wave band light is reflected by the dichroic element; wherein the first dichroic portion allows the second wave band light to pass therethrough and reflects the first wave band light and the third wave band light, and the second dichroic portion allows the first wave band light and the second wave band light to pass therethrough and reflects the third wave band light.