@inproceedings{db8c78efdec04caabf75dd0d2c70a578,
title = "Optimizing freeform lenses for non-rectangular irradiance tailoring of extended LED sources",
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).",
keywords = "Freeform lens, LED illumination, Optimization",
author = "Zexin Feng and Yuyin Li and Dewen Cheng and Yongtian Wang",
note = "Publisher Copyright: {\textcopyright} 2021 SPIE.; Illumination Optics VI 2021 ; Conference date: 13-09-2021 Through 17-09-2021",
year = "2021",
doi = "10.1117/12.2597092",
language = "English",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Kidger, \{Tina E.\} and Stuart David",
booktitle = "Illumination Optics VI",
address = "United States",
}