Optimized design of LED freeform lens for uniform circular illumination

Peng LIU; Reng-mao WU; Zhen-rong ZHENG; Hai-feng LI; Xu LIU

doi:10.1631/jzus.C12a0116

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Optimized design of LED freeform lens for uniform circular illumination

电子工程 | Updated：2022-12-09

- Optimized design of LED freeform lens for uniform circular illumination
- Optimized design of LED freeform lens for uniform circular illumination
- 信息与电子工程前沿（英文） 2012年13卷第12期页码：929-936
- Affiliations：
  
  State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, Hangzhou 310027, China
- Author bio：
  
  Zhen-rong ZHENG, E-mail: zzr@zju.edu.cn
  [ "Peng LIU, E-mail: benlau@zju.edu.cn" ]
- Funds：
  
  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), and the Fundamental Research Funds for Central Universities, China
- DOI：10.1631/jzus.C12a0116
  中图分类号： O43;TH74
- 收稿：2012-04-27，
  
  修回：2012-11-12，
  
  纸质出版：2012-12
- Accepted：
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Optimized design of LED freeform lens for uniform circular illumination[J]. 信息与电子工程前沿（英文）, 2012,13(12):929-936.

Peng LIU, Reng-mao WU, Zhen-rong ZHENG, et al. Optimized design of LED freeform lens for uniform circular illumination[J]. Frontiers of Information Technology & Electronic Engineering, 2012, 13(12): 929-936.
Optimized design of LED freeform lens for uniform circular illumination[J]. 信息与电子工程前沿（英文）, 2012,13(12):929-936. DOI： 10.1631/jzus.C12a0116.

Peng LIU, Reng-mao WU, Zhen-rong ZHENG, et al. Optimized design of LED freeform lens for uniform circular illumination[J]. Frontiers of Information Technology & Electronic Engineering, 2012, 13(12): 929-936. DOI： 10.1631/jzus.C12a0116.

摘要

Abstract

An optimization method is proposed for designing an LED freeform lens which produces a uniform circular pattern with high energy efficiency. This method is composed of three main aspects: design of the initial guess

parameterization of the freeform surface

and construction of the merit function. The initial guess is created by solving an ordinary differential equation numerically. An approach of selecting optimization points is introduced for parameterization of the freeform surface. The merit function is constructed by use of the irradiance uniformity and the efficiency of the lens. Design 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.

关键词

Keywords

references

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