Freeform road lighting lens design

Zexin Feng; Dewen Cheng; Yongtian Wang

doi:10.1117/12.2312452

28 May 2018 Freeform road lighting lens design

Zexin Feng, Dewen Cheng, Yongtian Wang

Proceedings Volume 10693, Illumination Optics V; 106930E (2018) https://doi.org/10.1117/12.2312452
Event: SPIE Optical Systems Design, 2018, Frankfurt, Germany

Abstract

Road lighting can benefit strongly from LEDs and freeform lenses. However, freeform lenses design for road lighting applications is complicated and difficult when balancing energy efficiency and lighting quality. In addition, the asymmetric properties of the required light distributions and non-neglectable sizes of LEDs make the design more challenging. Currently, we prefer an efficient design strategy with two steps: light distribution optimization and freeform lens construction. In the first step, we employ a modified polynomial representation of the illuminance distribution and perform constrained optimization. In the second step, we construct the freeform lens with double freeform surfaces to realize the optimized light distribution using the ray mapping method associated with over compensation.

Citation Download Citation

Zexin Feng, Dewen Cheng, and Yongtian Wang "Freeform road lighting lens design", Proc. SPIE 10693, Illumination Optics V, 106930E (28 May 2018); https://doi.org/10.1117/12.2312452

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