Optimized design of LED freeform lens for uniform circular illumination

作     者：Peng LIU Reng-mao WU Zhen-rong ZHENG Hai-feng LI Xu LIU 

作者机构：State Key Laboratory of Modern Optical Instrumentation Zhejiang University Hangzhou 310027 China 

基　　金：Project supported by the National Natural Science Foundation of China (No. 61177015) the National High-Tech R & D Program (863)of China (No. 2012AA10A503-2) the Fundamental Research Funds for Central Universities,China 

出 版 物：《Journal of Zhejiang University-Science C(Computers and Electronics)》 (浙江大学学报C辑（计算机与电子（英文版）)

年 卷 期：2012年第13卷第12期

页      码：929-936页

摘      要：An optimization method is proposed for designing an LED freeform lens which produces a uniform circular pattern with high energy *** method is composed of three main aspects:design of the initial guess,parameterization of the freeform surface,and construction of the merit *** initial guess is created by solving an ordinary differential equation *** approach of selecting optimization points is introduced for parameterization of the freeform *** merit function is constructed by use of the irradiance uniformity and the efficiency of the *** examples are given,and the results show that the irradiance distribution is well controlled with a maximum uniformity(the relative standard deviation of irradiance,RSD) of 0.0122 and a maximum efficiency of 93.88%.This optimization method can be generalized to design freeform lenses with different lighting patterns or without rotational symmetry.

主 题 词：Illumination design Lenses Light emitting diode(LED) Non-imaging optics 

学科分类：0810[工学-土木类] 08[工学] 080202[080202] 081304[081304] 0805[工学-能源动力学] 0813[工学-化工与制药类] 0802[工学-机械学] 0812[工学-测绘类] 

核心收录：

D　O　I：10.1631/jzus.C12a0116

馆 藏 号：203202657...