POLARIZED LIGHT CONVERSION DEVICE AS WELL AS POLARIZED LIGHT ILLUMINATION DEVICE USING THE SAME AND LIQUID CRYSTAL PROJECTOR

摘要

PROBLEM TO BE SOLVED: To obtain a polarized light conversion device which is small in size and light in weight and has good light utilization efficiency. SOLUTION: A polarized light conversion section consists of a central section 20G0 and its peripheral section. Since the polarized light conversion section 20G0 is arranged in the central part of the polarized light conversion device 20G, even if the parallelism of the polarized light conversion section 20G0 is degraded by the passage of light therethrough, the most of the light, can be made incident on a liquid crystal panel. The thickness DA of the polarized light conversion section 20G1 arranged in the side part of the polarized light conversion section 20G0 is smaller than the radius at the opening end of a parabolic mirror 12.