基于双自由曲面的LED均匀照明准直透镜设计  

Design of Collimating Lens with Uniform Illumination for LED Based on Double Freeform Surface

作　　者：赵欢[1,2] 李长庚[1] 陈志涛 张志清 赵维 王君君 

机构地区：[1]中南大学物理与电子学院,湖南长沙410012 [2]广东省半导体产业技术研究院,广东广州510651

出　　处：《光学学报》2017年第4期256-261,共6页Acta Optica Sinica

基　　金：国家自然科学基金(11304048);广东省自然科学基金(2015A030310023);广东省战略性新兴产业发展专项资金LED产业项目(2012A080301003;2012A080302002)

摘　　要：基于几何光学、能量守恒定律及菲涅耳定律等相关理论,提出了一种双自由曲面半导体发光二极管(LED)准直透镜的光学设计方法,并给出了构建准直透镜模型详细的算法设计。自由曲面是一种关于中心轴旋转对称的曲面,该曲面的二维轮廓在非均匀有理B样条曲线的方法理论基础上,采用ProE软件搭建而成。通过蒙特卡罗光线追迹模拟发现,相比传统的单自由曲面准直透镜,双自由曲面准直透镜不仅提高了照度均匀性,而且在能量利用率上也有显著的提高。研究结果表明,采用双自由曲面将大大提升准直透镜的设计空间,改善LED透镜的光学性能。An optical design of double freeform surface semiconductor light-emitting diode （LED） collimating lens is proposed based on relevant theories such as geometrical optics, law of energy conservation, and the Fresnel＇s law. Detailed algorithm design for constructing collimating lens model is presented as well. A freeform surface is a surface that is rotationally symmetric around a central axis. The 2D contour of this surface is constructed on the basis of non- uniform rational B-splines （NURBS） method and by ProE software. Through Monte Carlo ray tracing simulation, it is found that, compared with conventional single freeform surface collimating lens, double freeform surface collimating lens has greatly enhanced the illumination uniformity as well as the energy utilization. The research results have shown that, by using double freeform surface design, the design space can be remarkably extended, and the optical performance of collimating lens can be improved.

关 键 词：光学设计 双自由曲面 算法设计 蒙特卡罗光线追迹 准直透镜 

分 类 号：O439[机械工程—光学工程]