实现均匀照明的LED系统设计方法  

Lens Design for Uniform Illumination with LED

作　　者：李林[1] 王光珍[1] 王丽莉[1] 孔德鹏[1] 姬江军[1] 张亚军[2] 

机构地区：[1]中国科学院西安光学精密机械研究所瞬态光学与光子技术国家重点实验室,陕西西安710119 [2]北京化工大学机电工程学院,北京100029

出　　处：《光学学报》2012年第2期241-247,共7页Acta Optica Sinica

基　　金：国家863计划(2007AA032452);国家自然科学基金(60437020)资助课题

摘　　要：针对医用无影灯的应用要求,提出了一种利用非球面透镜实现对目标平面均匀照明的方法。基于能量守恒定律得到光源出射角与目标面之间的关系,利用Zemax的宏语言编写优化操作数使透镜优化满足上述关系,在非序列模式中对结果进行模拟和优化,并分别对透镜的前表面三种情况进行模拟,提出并模拟了LED球面阵列,并分析了角度及距离的偏移对照明均匀度的影响。结果表明,1m距离处实现了直径为25cm的平面内的均匀照明,均匀度(平均照度/最大照度)达到96%以上;球面阵列的设计可以满足无影灯的光分布要求,照明深度达到1m。A new method that the target plance is uniformly illuminated with aspheric lens is proposed. Based on the energy conservation law, it can be figured out the angle between the light source and the target surface, and the macro language of Zemax is used to make the lens meet the above mentioned relation, simulating and optimizing the result in the non-sequential mode and respectively simulating the three cases of the front surface. It is proposed and simulated a spherical LED array, and analysised the effect of the illumination uniformity of the angle and distance offsets . The result shows that the uniform illumination in a distance of 1 m and 0.25 m in diameter of the plane is achieved, with the uniformity of 96 % or more. The spherical array meets the application requirements of shadowless lighting and the depth of illumination up to 1 m.

关 键 词：光学设计 非球面 均匀照明 无影灯 Zemax软件 

分 类 号：O439[机械工程—光学工程]