Patent ID: 8029143
Filing Date: 2011-10-04
Classification: G02B,G02F

Abstract:
1. An illumination system, for providing an illumination beam to a light valve, the illumination system comprising: a light source, for generating the illumination beam; a light integration rod, disposed on a transmission path of the illumination beam; a color wheel, disposed on the transmission path of the illumination beam and comprising a plurality of color filters; a first focusing unit, disposed between the light integration rod and the color wheel and located on the transmission path of the illumination beam, the first focusing unit being capable of focusing the illumination beam onto the color wheel; and a second focusing unit, disposed between the color wheel and the light valve and located on the transmission path of the illumination beam, the second focusing unit being capable of focusing the illumination beam onto the light valve, wherein a light output end of the light integration rod is disposed on an object plane of the first focusing unit, while the color wheel is disposed on an imaging plane of the first focusing unit, and an object plane of the second focusing unit and the imaging plane of the first focusing unit are superposed with each other, while the light valve is disposed on an imaging plane of the second focusing unit.