基于tendue量的液晶投影物镜相对照度分析  

The Analysis of Relative Illumination for Projection Lens Based on étendue

作　　者：郑臻荣[1] 

机构地区：[1]浙江大学现代光学仪器国家重点实验室,杭州310027

出　　处：《光子学报》2005年第1期55-58,共4页Acta Photonica Sinica

基　　金：国防预研项目 (6 .6 .5 .1)

摘　　要：基于非成像光学的啨ｔｅｎｄｕｅ量对液晶投影显示照明系统和投影物镜进行匹配 ,对液晶投影物镜的相对照度进行分析 ,根据啨ｔｅｎｄｕｅ量计算照明系统液晶板照明面的发光强度分布 ,与根据朗伯体服从余弦分布的计算相对照度的算法进行比较 ,并对相对照度的Rimmer算法进行修正 ,分析和实验表明 ,修正算法得到的投影物镜相对照度计算更符合实际情况 ,对于投影物镜确定渐晕系数。Based on étendue, relative illumination of projection lens is analyzed. With consideration of the inner intensity distribution and angular distribution of light source, the intensity distribution vs étendue of facular emitted from lamp together with reflector has been deduced. Moreover, the intensity vs angular distribution of facular on LCD panel, which is far different away from Lambert distribution, has also been obtained by étendue transfer. Under the analysis, calculation method for relative illumination is revised, and relative illumination of LCD projection lens is calculated. By experiment, the new method based on étendue has more accuracy in relative illumination calculation for LCD projection lens.

关 键 词：投影物镜 相对照度 étendue量 

分 类 号：TH74[机械工程—光学工程]