Ray targeting for optimizing smooth freeform surfaces for LED non-rotational illumination

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

doi:10.1631/jzus.C1300032

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Ray targeting for optimizing smooth freeform surfaces for LED non-rotational illumination

电子工程 | Updated：2022-12-09

- Ray targeting for optimizing smooth freeform surfaces for LED non-rotational illumination
- Ray targeting for optimizing smooth freeform surfaces for LED non-rotational illumination
- 信息与电子工程前沿（英文） 2013年14卷第10期页码：785-791
- Affiliations：
  
  State Key Laboratory of Modern Optical Instrumentations, Zhejiang University, Hangzhou 310027, China
- Author bio：
  
  [ "Reng-mao WU, E-mail: wrmshu@163.com" ]
  Zhen-rong ZHENG, E-mail:zzr@zju.edu.cn
- Funds：
  
  Project supported by the National High-Tech R&D Program (863) of China (No. 2012AA10A503), the National Natural Science Foundation of China (No. 61177015), and the Fundamental Research Funds for the Central Universities, China (No. 2012XZZX013)
- DOI：10.1631/jzus.C1300032
  中图分类号： O43
- 收稿：2013-01-31，
  
  修回：2013-;9-16，
  
  纸质出版：2013-10
- Accepted：
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Ray targeting for optimizing smooth freeform surfaces for LED non-rotational illumination[J]. 信息与电子工程前沿（英文）, 2013,14(10):785-791.

Reng-mao WU, Peng LIU, Ya-qin ZHANG, et al. Ray targeting for optimizing smooth freeform surfaces for LED non-rotational illumination[J]. Frontiers of Information Technology & Electronic Engineering, 2013, 14(10): 785-791.
Ray targeting for optimizing smooth freeform surfaces for LED non-rotational illumination[J]. 信息与电子工程前沿（英文）, 2013,14(10):785-791. DOI： 10.1631/jzus.C1300032.

Reng-mao WU, Peng LIU, Ya-qin ZHANG, et al. Ray targeting for optimizing smooth freeform surfaces for LED non-rotational illumination[J]. Frontiers of Information Technology & Electronic Engineering, 2013, 14(10): 785-791. DOI： 10.1631/jzus.C1300032.

摘要

Abstract

We propose an effective optimization method for generating smooth freeform surfaces for light-emitting diode (LED) non-rotational illumination based on ray targeting. This method begins with a starting design and goes through two optimization steps. An initial estimate is determined using a partial differential equation (PDE) method and a variable separation mapping. In the first optimization step the merit function is developed with ray targeting to ensure the shape of the illumination pattern. The purpose of the second optimization is to further improve the optical performance by constructing the merit function with uniformity and efficiency. Smooth freeform reflective and refractive surfaces

which can produce a uniform rectangular illumination without rotational symmetry

are designed using this method. The results show that uniform rectangular illumination is achieved and that smooth freeform surfaces are obtained. With ray targeting

the design efficiency can be significantly enhanced

and excellent optical performance can be achieved.

关键词

Keywords

references

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