Patent ID: 8882279

Claim:
An illumination system, comprising: a first light source, providing a first wave band light; a dichroic element; at least one light condensing element, having an optical axis; a rotary wheel, having at least one wave band transforming area and a reflecting area and being disposed at a first side of the optical axis; and a light integrating element, being disposed at a second side of the optical axis, wherein the light integrating element and the rotary wheel are optically conjugate about the optical axis, and wherein the light integrating element has an entrance which is optically conjugate to a light focusing portion of the rotary wheel, wherein the first wave band light is emitted through the dichroic element and the at least one light condensing element, and focuses on the at least one wave band transforming area or the reflecting area, when the first wave band light focuses on the at least one wave band transforming area, the first wave band light is transformed into a second wave band light, and the second wave band light is focused on the light integrating element by the at least one light condensing element, when the first wave band light focuses on the reflecting area, the first wave band light is reflected by the reflecting area, and is focused on the light integrating element by the at least one light condensing element.