PROJECTOR SYSTEM WITH LIGHT PIPE OPTICS

摘要

A projector system includes a lamp (10), a reflector collector optic (11), relay optics (18, 19) to image light from a light pipe (15) exit pupil to an image gate of an image forming means (21), such as a film gate or an LCD panel. The light pipe is hollow and has cold mirror reflecting internal wall s, is tapered in shape, and has an entrance pupil which is larger than a center section in cross section. The light pipe mixes the light by internal reflection and produces light which is uniform in color and intensity across the exit pupil.