Illumination optics for liquid crystal projectors

摘要

Recent technological advances in liquid crystal projectors are expected to provide high-quality,large-area displays. We have studied illumination optics to achieve further improvements in systemperformance. In this paper, the basic concepts of various illumination methods are reviewed and a new type ofillumination optics is proposed. This uses a pair of special lenses whose surface profiles aredetermined by nonlinear least-square fitting combined with ray-tracing calculations. The circularcross section of the incident light beam is transformed into a rectangular form. The results ofsimulation suggest that high-efficiency, well-collimated illumination is possible.