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Design of afreeform reflector for LED sources based on a feedback method

机译：基于反馈法的LED光源自由曲面反射器设计

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摘要

We propose a method for the design of a freeform reflector by means of feedback methods to create light-emitting diode (LED) sources with uniform illuminance. A reflector is first designed to obtain a uniform circular light distribution for a point source. Then the optical performance of the reflector is investigated for both the point sources and extended sources based on a Monte Carlo ray tracing method. Comparing the illumination differences, a new reflector is generated by adding feedback. Repeated iterations of feedback can improve the reflector performance. To validate the method, a reflector is designed for an extended LED source. The results demonstrate that the illuminance uniformity can reach 88% and system efficiency can reach 97.4% simultaneously, after six feedback cycles. These are certainly able to meet the needs of general lighting applications.
机译：我们提出一种通过反馈方法设计自由形式反射器的方法，以创建具有均匀照度的发光二极管（LED）源。首先设计反射器以获得点光源的均匀圆形光分布。然后，基于蒙特卡洛射线追踪方法，针对点光源和扩展光源，研究了反射器的光学性能。比较照度差异，通过添加反馈生成新的反射器。反馈的重复迭代可以提高反射器性能。为了验证该方法，为扩展LED源设计了反射器。结果表明，经过六个反馈周期，照度均匀度可以达到88％，系统效率可以同时达到97.4％。这些肯定能够满足一般照明应用的需求。

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  • 来源
    《Lighting Research & Technology》 |2016年第3期|365-375|共11页
  • 作者

    H Wu; C Luo; X Zhang; P Ge; X Zhang;

  • 作者单位

    Guangdong Provincial Key Laboratory of Precision Equipment and Manufacturing Technology, School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou, China;

    Engineering Research Center for Optoelectronics of Guangdong Province, School of Physics and Optoelectronics, South China University of Technology, Guangzhou, China;

    Engineering Research Center for Optoelectronics of Guangdong Province, School of Physics and Optoelectronics, South China University of Technology, Guangzhou, China;

    Engineering Research Center for Optoelectronics of Guangdong Province, School of Physics and Optoelectronics, South China University of Technology, Guangzhou 510640, China;

    Guangdong Provincial Key Laboratory of Precision Equipment and Manufacturing Technology, School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou, China;

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