基于扩展光源的曲面能量映射优化设计方法  

Design Method for Surface Energy Mapping Optimization Based on Extended Light Source

作　　者：黄丹 冯奇斌 唐天 王梓 彭友 吴疆 王科 吕国强[1,2] Huang Dan;Feng Qibin;Tang Tian;Wang Zi;Peng You;Wu Jiang;Wang Ke;Lu Guoqiang(School of Instrumentatioyi and Opto-Electronics Engineering,Hefei University of Technology,Hefei,Anhui 230009,China;National Engineering Laboratory of Special Display Technology,National Key Laboratoryof Advanced Display Technology,Academy of Photoelectric Technology,Hefei,Anhui 230009,China;Anhui Coreach Technology Co.,Ltd.,Hefei,Anhui 230031,China)

机构地区：[1]合肥工业大学仪器科学与光电工程学院,安徽合肥230009 [2]特种显示技术国家工程实验室,现代显示技术省部共建国家重点实验室,光电技术研究院,安徽合肥230009 [3]安徽芯瑞达科技股份有限公司,安徽合肥230031

出　　处：《光学学报》2019年第12期290-297,共8页Acta Optica Sinica

基　　金：安徽省科技重大专项(18030901002)

摘　　要：提出了一种基于曲面能量映射的反馈优化设计方法,通过预先计算目标面能量分布趋势重新分配目标面网格单元,构建新的自由曲面透镜面型。采用该方法设计并分析比较了一系列透镜,仿真发现:当目标面半径与目标面高的比值(DHR)为2、透镜高和LED宽度的比值从1∶1变化到1.5∶1时,照度非均匀性下降了8.97%~11.95%;当透镜高和LED宽度的比值为1.5∶1、DHR从1.8变化到2.2时,照度非均匀性下降了7.60%~16.49%。所提方法能有效改善扩展光源下目标面的照度均匀性,设计过程不依赖于仿真软件,迭代次数少,简便易行。A feedback optimization design method based on surface energy mapping is proposed herein. By pre-calculating the energy distribution on the target surface, the target surface mesh unit is redistributed to build a new free-form surface lens profile. A series of lenses is designed using this method, and the simulation results show that when the ratio of the target surface radius to height(DHR) is equal to 2 and ratio of the lens height to the LED width changes from 1∶1 to 1.5∶1, the nonuniformity is reduced by 8.97%-11.95%. Moreover, when the ratio of lens height to LED width is 1.5∶1 and DHR changes from 1.8 to 2.2, the nonuniformity is reduced by 7.60%-16.49%. Thus, the proposed method can effectively improve the illumination under an extended light source. The design process does not depend on the simulation software utilized, and it is simple and easy. The number of iterations is small.

关 键 词：光学设计 自由曲面透镜 扩展光源 反馈优化 

分 类 号：TN141.9[电子电信—物理电子学]