用于大型广告灯箱的LED一次透镜设计与仿真  

Design and Simulation of LED First Lens for Large Advertising Light Boxes

作　　者：李建鹏[1] 郭震宁[1] 张佳宁[1] 薛冬冬[1] 陈中行[1] 

机构地区：[1]华侨大学信息科学与工程学院,福建省光传输与变换重点实验室,福建厦门361021

出　　处：《照明工程学报》2017年第3期86-90,共5页China Illuminating Engineering Journal

基　　金：福建省科技计划引导性重点项目(No.2016H0022);泉州市科技计划项目(No.2015TZ31,No.2016T002);南安市科技计划重点项目(No.G2016Y04);华侨大学研究生科研创新能力培育项目(No.1511301011);华侨大学国家级大学生创新训练项目(No.201610385057)

摘　　要：在矩形的LED大型广告灯箱的设计中,由于LED与二次透镜的装配问题易使光能浪费和配光效果不理想,且在圆形光斑的阵列叠加时,不易在目标面上形成矩形的均匀光场。基于能量守恒定律和网格划分法,设计了一款产生均匀矩形光斑的自由曲面LED一次透镜。根据能量守恒定律建立映射关系,且对LED光通量和目标面进行网格划分,并结合snell定律,迭代求解出一次透镜的曲面数据点。用Lighttools仿真分析了矩形光斑LED一次透镜阵列在高度为100 mm的目标面上的照度均匀性。结果表明:本文设计的LED一次透镜可产生尺寸为600 mm×200 mm的矩形光场,且在间距为300 mm×190 mm的LED一次透镜阵列中,目标面上的照度均匀度达到了91.54%,符合大型广告灯箱的设计标准。To design the large rectangular LED advertising light box, the secondary lens and the LED must be combined in general, which easily make energy waste and form the terrible light distribution. What＇ s more, it＇ s difficult to form a rectangular uniform light field on the target surface, in the array of circular light fields. Based on the law of conservation of energy and the mesh generation method, a first lens for LED was designed to achieve a uniform rectangular light field. According to the mapping relations established by the law of conservation of energy, the mesh generation of the light source and the target surface was realized. Then, the snell law was combined with the iteration to solve the surface data of the first lens. The illumination uniformity of the LED array with the first lens on the target plane with a height of 100 mm was analyzed by the Lighttools simulation. The research showed that a rectangular light field with size of 600 mm × 200 mm can be produced by the first lens for LED, and then the illumination uniformity value on the target plane was 91.54% , when the array distance of the LED first lens array was 300 mm × 190 mm, which accord with the design standard of the large advertising light boxes.

关 键 词：光学设计 广告灯箱 LED 一次透镜 矩形光斑 均匀照度 设计 仿真 

分 类 号：TM923.34[电气工程—电力电子与电力传动]