实现LED台灯均匀照明的自由曲面透镜仿真设计  

Simulation Design of Freeform Lens for Realizing Uniform Illumination of LED Table Lamp

作　　者：卓友望[1] 葛子平[1] 

机构地区：[1]华南理工大学机械与汽车工程学院表面功能结构先进制造广东普通高校重点实验室,广州510640

出　　处：《照明工程学报》2011年第6期4-7,共4页China Illuminating Engineering Journal

摘　　要：针对LED台灯照明区域照度均匀度不足的现状,提出了利用自由曲面透镜实现二次光学配光的方法。基于光源的朗伯光学特性,建立理想LED点光源与照明区域的余弦拓扑关系,并依据Snell定律通过MATLAB编程迭代计算自由曲面的母线。利用Tracepro光学软件仿真分析了光源实际尺寸对配光效果的影响,并探讨了透镜尺寸与配光效果的关系。经仿真优化的自由曲面透镜,实现发光半径2mm的LED光源在台灯要求的照明区域上均匀度(最小值/最大值)达到95%,同时光的利用效率提高20%以上。Due to the low uniform illumination of LED table lamp,a freeform lens is proposed to achieve light distribution by secondary optics design.A cosine topology relationship is established between the LED ideal point source and the illumination area,based on the optical properties of lambertian.According to snell＇s law using MATLAB programming,the generatrix of freeform lens is calculated.And then,Tracepro software is adapted to simulating and analyzing effects of the actual sizes,of LED light source and freeform lens,on light distribution.After the simulation optimization of the freeform lens,a LED source,of which the radius is 2mm,could achieve illuminance uniformity（min/max） of 0.95 in the illumination area,which is required by table lamp.And the efficiency of LED light could increase by over 20%.

关 键 词：LED台灯 自由曲面透镜 二次光学设计 配光 透镜尺寸 

分 类 号：TM923.44[电气工程—电力电子与电力传动]