投影电视的均匀照明系统设计

Design of Illumination Systems for Projection Displays

摘要:

分析和设计了用于提高大屏幕投影电视光学性能的均匀照明系统：透镜阵列和积分方棒。基于弧长为1．2mm的超高压水银灯(UHP)．建立嵌套圆筒的体光源模型．给出了两个照明系统的设计方法和用于2．3cm空间光调制器照明系统的设计参数。仿真结果表明，透镜阵列系统实现了均匀性( 4．55％，-5．54％)，光能利用率为81％的照明输出；积分方棒系统实现了均匀性( 4．37％，-4．58％)，光能利用率为79％的远心照明输出。均能满足投影电视对照明系统的指标要求。

Abstract:

Lens array and light pipe illumination systems were analysed and designed for improving optical performance of projection display.And the design method and parameters were discussed.Based on the UHP of 1.2 mm,a nested cylindrical volume source was modelled and the illumination systems with 2.3 cm imager were imitated.The modelling result by light tools shows the optical efficiency 81 %,the uniformity +4.55 %, -5.54 % of the lens array system and the optical efficiency 79 %, the uniformity +4.37 % ,-4.58 % of the telecentric light pipe system.Both of them are satisfied with the illuminative requirement of projection display.