Illumination system an projection apparatus using the same

Abstract

An illumination system including a first polarized light source, a second polarized light source and a polarization beam splitter is provided. The first polarized light source is suitable for providing a first light beam with a first polarization direction, and the second polarized light source is suitable for providing a second light beam with a second polarization direction orthogonal to the first polarization direction. The polarization beam splitter is disposed on the intersection of the optical paths of the first light beam and the second light beam for reflecting the first light beam and permitting the second light beam to pass through, such that the first light beam reflected by the polarization beam splitter coincides with the second light beam passing through the polarization beam splitter. Thus, the illumination system provides a light beam with better convergence. Besides, a projection apparatus having the illumination system mentioned above is also provided.

Dependencies are inferred from the claim text.