Design of a freeform reflector for LED sources based on a feedback method-Reference-Cited by-同舟云学术

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

Published:2014-12-15 Issue:3 Volume:48 Page:365-375
ISSN:1477-1535
Container-title:Lighting Research & Technology
language:en
Short-container-title:Lighting Research & Technology

Author:

Wu H¹,Luo C²,Zhang X²,Ge P²,Zhang X¹

Affiliation:

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

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

Abstract

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.

Publisher

SAGE Publications

Subject

Electrical and Electronic Engineering

Link

http://journals.sagepub.com/doi/pdf/10.1177/1477153514564002

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