LED照明光场照度均匀性的研究  

Study of illuminance uniformity for LED illumination light field

作　　者：闫峰[1] 孙文军[1] 王淑英[1] 尹燕宗[1] 孟中[2] 

机构地区：[1]哈尔滨师范大学理化学院,哈尔滨150025 [2]中国科学院长春光机所航测部,长春130022

出　　处：《光学技术》2007年第S1期327-328,共2页Optical Technique

基　　金：黑龙江省青年基金资助项目(QC06C043);哈尔滨市青年创新基金资助项目(RFQXG055)

摘　　要：提出了LED面板与梯形高反射率混光筒相结合的匀光方法。单个LED作为近朗伯体发光,其光能输出较低,且发散角较大,难以直接利用。采用多个LED矩阵排列作为光源,增加了光源的有效发光面积和光通量。梯形混光筒内部各面镀有高反射率膜,使得进入混光筒内部的光线无吸收的反射,最后充分混合输出。调整梯形筒的长度可提高出射面上的光照度均匀性。利用TracePro软件对设计系统进行了模拟分析,结果表明出射面的照度均匀性大于90%,能量利用率大于65%,优于FF双焦距光学系统,并且整个系统结构简单紧凑,易于实现,成本不高。A uniforming light algorithm based on trapezoid light mixing barrel is presented by for multi-LED illumination.The light energy output is less,the angle of divergency is larger for single LED.Multi-LED is used as illuminace light source,increasing effective irradiance area and light energy output for illuminance light source.Each side in the trapezoid light mixing barrel is coated by high reflectivity film,reflecting the incident rays without absorption,sufficiently mixing the incident light.The illumination uniformity at output area is improved by adjusting of the length of trapezoid mixing barrel.Experimental results analyzed by TracePro software show that the proposed uniforming light algorithm achieved higher uniformity at 90% and better energy efficiency than FF two-focus optical system.In addition,the designed system is simple and easy to come true.

关 键 词：应用光学 LED阵列 梯形混光筒 光能利用率 照度均匀性 

分 类 号：TM923[电气工程—电力电子与电力传动]