Optimizing freeform lenses for non-rectangular irradiance tailoring of extended LED sources

Zexin Feng; Yuyin Li; Dewen Cheng; Yongtian Wang

doi:10.1117/12.2597092

12 September 2021 Optimizing freeform lenses for non-rectangular irradiance tailoring of extended LED sources

Zexin Feng, Yuyin Li, Dewen Cheng, Yongtian Wang

Proceedings Volume 11874, Illumination Optics VI; 118740O (2021) https://doi.org/10.1117/12.2597092
Event: SPIE Optical Systems Design, 2021, Online Only

Abstract

Most of the freeform lens optimization methods for LED beam shaping are focused on producing rectangular illumination patterns. Here we demonstrate the generation of non-rectangular irradiance distributions by optimizing the 'uv'-polynomial freeform surface, where (u,v) are stereographic coordinates. An initial freeform surface is designed with an optimal transport ray mapping method that is suitable for unconventional boundaries. Simulated annealing is then used to optimize the polynomial coefficients based on an automated workflow that links Matlab (central platform and optimization engine), Rhinoceros (3D molding) and LightTools (Ray tracing).

Conference Presentation

Citation Download Citation

Zexin Feng, Yuyin Li, Dewen Cheng, and Yongtian Wang "Optimizing freeform lenses for non-rectangular irradiance tailoring of extended LED sources", Proc. SPIE 11874, Illumination Optics VI, 118740O (12 September 2021); https://doi.org/10.1117/12.2597092

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