Patent ID: 6631992
Filing Date: 2003-10-14
Classification: H04N

Abstract:
A system for adjusting a color of a light source along an illumination path, comprising:first integrator plate positioned along the illumination path; a first polarizer positioned along the illumination path downstream from said first integrator plate, said first polarizer to polarize the light source a fixed retarder positioned along the illumination path downstream from said first integrator plate, said fixed retarder having a first optical axis at a first angle to the illumination path an electronically variable retarder positioned along the illumination path downstream from said first integrator plate, said electronically variable retarder having a second optical axis at a second angle to the illumination path; and a second polarizer positioned along the illumination path downstream from said first integrator plate, said second polarizer to polarize the polarized light; and a second integrator plate positioned along the illumination path downstream from said first integrator plate.