Illumination system and projector thereof

An illumination system applied to providing a projection beam of a projector, the projector comprising a light source, the illumination system receiving at least one color light of the light source to form the projection beam, the illumination system comprising:

• a lens array component disposed at a light-exit axis of the light source for homogenizing the at least one color light transmitted from the light source;
• a digital micromirror component having a micromirror array for modulating the at least one color light to form the projection beam projected along a projection axis;
• a refractive component disposed between the lens array component and the digital micromirror component for enlarging the at least one color light transmitted from the lens array component and guiding the at least one color light to be incident to the digital micromirror component and cover the micromirror array;
• and
• a projection lens disposed at the projection axis to receive the projection beam for image projection.