The illumination system of the MAS 2.0 was optimized de novo for the use of the most recent generation of high power UV LEDs , and to use exclusively off-the-shelf optical components. The purpose of the illumination system is to collect a maximum of light from the LED, spatially homogenize the light in order to illuminate each micromirror with the same intensity of light, and shape the resulting homogeneous beam of light to slightly overfill the DMD. The resulting illumination of the DMD should have the same numerical aperture as that of the catadioptric relay, 0.12.