针对LED扩展光源照明的自由曲面透镜设计  

Design of an LED freeform lens for LED extended light source illumination

作　　者：杨超 宋国华 范婷婷 缪建文 YANG Chao;SONG Guohua;FAN Tingting;MIAO Jianwen(Department of Physics,College of Science,Nantong University,Nantong 226019,China;Department of Chemistry,College of Chemistry and Chemical Engineering,Nantong University,Nantong 226019,China)

机构地区：[1]南通大学理学院物理系,江苏南通226019 [2]南通大学化学化工学院化学系,江苏南通226019

出　　处：《光学技术》2022年第2期129-134,共6页Optical Technique

基　　金：南通大学大型仪器开放基金(KFJN2102)。

摘　　要：针对LED扩展光源,采用双向反馈网格法设计了自由曲面透镜。划分光源和目标面的能量网格,通过对每一条迭代曲线建立反馈系数,对网格点进行修正并建立新的映射关系,设计了两个目标面中心无光照度的自由曲面透镜。将设计的自由曲面透镜用蒙特卡罗方法对不同尺寸的LED扩展光源进行了模拟仿真。结果表明,对于尺寸在4mm×4mm以下的LED扩展光源,所设计的自由曲面透镜在照明区域内的均匀度和光能利用率均能达到90.5%以上,适用于道路照明等场合。For the LED extended light source,the bidirectional feedback mesh design method is used to design the freeform lens.Divide the energy grid of light source and target surface,and according to the feedback coefficient is established for each iteration curve,the mesh points are modified,and a new mapping relationship is established.Finally,two kinds of freeform lenses with no illumination in the center of the illumination area are designed.The Monte Carlo method is used to simulate led extended light sources with different sizes.The results show that for the LED extended light source with a size of less than 4 mm×4 mm,the uniformity and light energy utilization of the designed freeform lens in the lighting area can reach more than 90.5%,and it is suitable for road lighting occasions.

关 键 词：LED扩展光源 自由曲面透镜 迭代 反馈系数 均匀度 

分 类 号：O439[机械工程—光学工程]