LED自由曲面匀光透镜的局部优化设计方法  

Local Optimization of Freeform Surface Lens for Uniform Illumination of LED

作　　者：郝剑[1,2] 刘华[1] 王尧[1] 孙强[1] 荆雷[1] 王鹤[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电技术研发中心,吉林长春130033 [2]中国科学院大学,北京100049

出　　处：《激光与光电子学进展》2013年第7期98-103,共6页Laser & Optoelectronics Progress

基　　金：国家973计划(2012C13227101);中国科学院三期创新工程

摘　　要：从非成像光学理论出发,提出了一种新的实现自由曲面透镜的局部优化设计方法。初始模型采用规则的二次曲线代替自由曲线,通过对TracePro软件中的Scheme编程语言和优化引擎的结合使用,对匀光透镜进行局部优化设计,最终实现了LED均匀照明。结果表明:当光源为1mm×1mm朗伯体发光的LED时,可以在1m处实现发散角为±15°内的均匀照明,光能利用率达到80.89%,均匀性达到95%以上。与目前通用的全局优化方法相比较,在视场角和均匀性方面有明显的改善。此方法还有过程简单、对初始模型要求较低和通用性好等特点。A local optimization method in the design of freeform surface lens based on non-imaging optics to achieve uniform illumination for LED source is proposed. In this design, the regular quadratic curve is adopted to replace the freeform curve of initial model, and the Scheme programming language and the optimization engine in the TracePro software are used in combination. In this way, a uniform illumination of LED is achieved. A Lambert emission of 1 minx 1 mm LED is used as simulation source. It is shown that the illumination efficiency of 80.89% and the uniformity of 95% within a field of view of ± 15° are achieved at the target surface 1 m away from the source. Compared with the current global optimization method, the field-of-view and the illumination uniformity are improved significantly by this technique. It also possesses advantages of simplicity in process, less reliability requirement on initial model, and good versatility.

关 键 词：光学设计 匀光照明 非成像光学 局部优化 

分 类 号：O439[机械工程—光学工程]