The system can be divided into three subsystems: LED imaging into the homogenizer, homogenization, and imaging of the homogenized light to the DMD. The LED imaging starts with a Nichia NWSU333B UV LED, which radiates up to about 4 watts of 365 nm light (~16 W input) with a Lambertian angular distribution from a 2 × 2 mm emitting surface within the package. This light must be efficiently collected and imaged, via a homogenizer, to fill the 21 × 12 mm 1080p DMD. This represents an 11-fold magnification along the long axis of the DMD. Light from the LED is collected from a numerical aperture of 0.8 (Figure ) and imaged onto the 4.5 × 4.5 mm entrance to the homogenizer (Figure ). The homogenizer is a hexagonal fused silica light pipe with 8 mm sides and a length of 150 mm and works by multiple total internal reflections. The exit of the light pipe is then imaged onto the DMD (Figure ). Not shown in Figure is a turning mirror used to direct the image to the DMD, nor a set of four adjustable blades (field aperture) that are used to shape the hexagonal format output of the homogenizer to the rectangular shape of the DMD. To ensure that the 0.34 numerical aperture required at the entrance to the homogenizer is filled, a holographic diffuser with a 10° diffusing angle is placed immediately in front of the entrance. Part lists and specifications for the illumination system can be found in the supplementary materials.