Reflector design for large-size spherical surface sources

Liangliang Cao; Yanjun Han; Zexin Feng; Yi Luo

doi:10.1117/1.3541803

Abstract

We propose a novel method for designing reflectors with large-size spherical surface sources. The center portion of the reflector is designed using the edge-ray principle, while the rim portion is designed based on the variable-separation mapping method. Step discontinuities are introduced during rim surface construction to control the deviation caused by error in normal vectors, and a feedback modification is adopted to compensate for the illuminance deviation produced by the large size of sources. As an example, a streetlamp with a desired rectangular illuminance distribution on the road is designed using a spherical surface source (10 cm diam) and a compact reflector. It has an illuminance uniformity of 60.2% and utilance of 66.9%, considerably improved from the traditional values of 35 and 40%, respectively.

Citation Download Citation

Liangliang Cao, Liangliang Cao, Yanjun Han, Yanjun Han, Zexin Feng, Zexin Feng, Yi Luo, Yi Luo, } "Reflector design for large-size spherical surface sources," Optical Engineering 50(2), 023001 (1 February 2011). https://doi.org/10.1117/1.3541803 . Submission:

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