Patent ID: 7018076
Filing Date: 2006-03-28
Classification: G03B

Abstract:
1. In a projector having a lamp for emitting light, an ellipsoid reflector for capturing said light from a first focal point of the ellipsoid reflector and focusing said light at a second focal point co-incident with an integrator rod, a spherical reflector for retro-reflecting light through the first focal point for reflection by said ellipsoid reflector to said second focal point, the improvement comprising conforming the shape of said ellipsoid reflector and spherical reflector for channeling air over and outside of the ellipsoid reflector and along the inside of the spherical reflectors, wherein said spherical reflector has a larger diameter than said ellipsoid reflector at an interface therebetween such that air forced over and outside of the ellipsoid reflector and then passes along the inside of the spherical reflector.