基于TIR结构的矩形区域照明LED透镜的设计  

Design of LED lens based on TIR structure for line-shaped regions

作　　者：韩敏[1] 叶正南 康廉洁 居荣兵 刘言[1] 丁桂林[1] Han Min Ye Zhengnan Kang Lianjie Ju Rongbing Liu Yan Ding Guilin(School of Mechanical Engineering, Jiangsu University, Zhenjiang 212000, China Shenzhen Xinxiye Photoelectric Co. ,Ltd. ,Shenzhen 518000,China)

机构地区：[1]江苏大学机械工程学院,江苏镇江212000 [2]深圳市鑫希叶光电有限公司,广东深圳518000

出　　处：《应用光学》2016年第5期668-672,共5页Journal of Applied Optics

摘　　要：研究一种可以在高横纵比的线形区域形成特定照度分布的LED透镜设计方法,即分部设计法。全反射部分根据边缘射线原理和斯涅耳定律设计,采用数值积分迭代法计算,Matlab编程得到全反射部分的轮廓线;透射部分用试错法设计,用SolidWorks将全反射部分和透射部分整合出了一款新的拱形透镜。设计的透镜尺寸为25mm×18mm×10mm。模拟与实践结果表明:透镜匹配扩展光源后,光学效率高于85%,半光强角可达9°×135°,可以在横纵比大于15的线形区域实现均匀照明。We proposed a high-efficient method for the design of the LED lens generating the required irradiance distribution in a rectangular area with a large aspect ratio which was named division-design method： the part of total-internal-reflection（TIR） was designed based on Snell＇ s law and edge-ray principle, and calculated by iterative integral method, besides, the Matlab programming method was used for its 2D eontour;the part of transmission was designed based on the trial and error method; then the two parts were integrated togeth＇er into a novel arch lens by SolidWorks with the size of 25 mm×18 mm× 10 mm. The simulation and experiment results show that the efficiency of the light system is up to 85% while the lens matches with the LED extended source, and the beam angle is about 9°×135° wide at the position of halfvalue of the peak light intensity which means generating the uniform irradiance distribution in a rectangular area with an aspect ratio larger than 15 .

关 键 词：照明设计 LED二次光学设计 线形区域 边缘光线原理 拱形透镜 TIR 

分 类 号：TB133[机械工程—光学工程]