Frontiers of Optoelectronics, 2016, 9 (2): 330, 网络出版: 2016-10-21
Simple dynamic energy core equivalent rays method to design freeform surface for extended source
Simple dynamic energy core equivalent rays method to design freeform surface for extended source
nonimaging optics nonimaging optics illumination design illumination design light emitting diodes (LEDs) light emitting diodes (LEDs)
摘要
A simple method is proposed to design freeform surface for Lambertian extended source. In this method, it can take advantage of the designing method for point source via substituting each incident ray with a dynamically calculated equivalent ray. For each facet on the freeform surface, the equivalent ray emits from the energy weighted average-emitting-position for the corresponding incident beam, and redirects into the direction which is determined by a source-to-target mapping. The results of the designing examples show that the light distributions’ uniformities can be improved by this method, e.g., even the improvement of 59% can be achieved.
Abstract
A simple method is proposed to design freeform surface for Lambertian extended source. In this method, it can take advantage of the designing method for point source via substituting each incident ray with a dynamically calculated equivalent ray. For each facet on the freeform surface, the equivalent ray emits from the energy weighted average-emitting-position for the corresponding incident beam, and redirects into the direction which is determined by a source-to-target mapping. The results of the designing examples show that the light distributions’ uniformities can be improved by this method, e.g., even the improvement of 59% can be achieved.
Kun WANG, Yanjun HAN, Hongtao LI, Yi LUO, Zhibiao HAO, Lai WANG, Changzheng SU, Bing XIONG, Jian WANG. Simple dynamic energy core equivalent rays method to design freeform surface for extended source[J]. Frontiers of Optoelectronics, 2016, 9(2): 330. Kun WANG, Yanjun HAN, Hongtao LI, Yi LUO, Zhibiao HAO, Lai WANG, Changzheng SUN, Bing XIONG, Jian WANG. Simple dynamic energy core equivalent rays method to design freeform surface for extended source[J]. Frontiers of Optoelectronics, 2016, 9(2): 330.