A light recycler for use in color projection display systems. The light
recycler redirects light reflected by a color wheel of the projection
system to increase the light output of the projection system. The light
recycler is capable of setting the desired numerical aperture of the
light source beam, as well as providing the desired spatial distribution
of light in terms of intensity and angle. This improves the light
uniformity and brightness of the image displayed by the projection
system, and improves the efficiency of the system. The light recycler
includes at least one substantially planar optical element array
receiving the non-uniform light from the light source. The optical
element array includes an optically transmissive substrate and a
plurality of optical micro-elements formed in the substrate. The
micro-elements act together to produce an output light beam having a
desired cross-sectional area and spatial distribution of light intensity
and angle.