Frontiers of Optoelectronics, Volume. 9, Issue 2, 330(2016)

Simple dynamic energy core equivalent rays method to design freeform surface for extended source

Kun WANG, Yanjun HAN*, Hongtao LI, Yi LUO, Zhibiao HAO, Lai WANG, Changzheng SUN, Bing XIONG, and Jian WANG
Author Affiliations
  • Tsinghua National Lab on Information Science and Technology, Department of Electronic Engineering, Tsinghua University, Beijing 100084, China
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    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.

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    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

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    Paper Information

    Category: RESEARCH ARTICLE

    Received: Feb. 2, 2016

    Accepted: Feb. 18, 2016

    Published Online: Oct. 21, 2016

    The Author Email: Yanjun HAN (yjhan@tsinghua.edu.cn)

    DOI:10.1007/s12200-016-0619-y

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