用于投影显示的匀光杆照明系统设计  

Integrator-rod Illumination System Design for Projection Display

作　　者：张增宝[1] 张新[1] 翁志成[1] 丛小杰[1] 冯树龙[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所光学技术中心,吉林长春130033

出　　处：《发光学报》2004年第5期591-596,共6页Chinese Journal of Luminescence

摘　　要：基于DMD和LCoS空间光调制器的投影显示对照明系统提出了更高的要求,有必要对原有的匀光杆照明系统进行分析和改进。着重于建立一个精确的匀光杆照明系统模型,对各个参数进行了细致的分析和总体的优化。同时提出了一种高效率的组合反射镜模型,通过LightTools软件模拟仿真,实现了ANSI照明均匀性为(+4.2%,-4.6%),光能利用率为82%的照明输出。能够满足投影显示对照明系统的指标要求。It has been in great use for the integrated rod illumination system in integrated rod projection display field because of its simple structure, low cost, high efficiency and uniformity. The principle is that with the application of the ray reflected several times in integrated rod the ray can form well-proportioned rectangular illumination in the end of the rod. With the reduction of the light modulator dimension, the advance system is required to analyze and design with the concept of Etendue value.It is complicated to analyze data of the light source. In this paper the solid source model is induced and with the space distribution and angular distribution of the intensity, the model method is given. It is helpful to estimate and simulate the uniformity, optical efficiency and optimum Etendue value by exactly analyzing.Expanding the reflection ray in integrated rod by law, the merge and the center of the rod can be found because different ray has different location. These rays have different reflection times before they reach the end surface of the rod also. The formulation and the function of rod uniformity are given.The Etendue value is reduced with the reduction of modulator dimension. So how to reduce Etendue value but keep the efficiency is a big problem for the illumination and light source design. An improved light source reflector, which can reduce Etendue value effectively, is introduced. It is fit for 1.3～1.8 cm light modulator judged by computer simulation.

关 键 词：组合反光镜 匀光杆 照明系统 Etendue量 光效率 

分 类 号：TN873.93[电子电信—信息与通信工程]