@inproceedings{efd3cfcb5d5c47d38fe6e718a920e62e,
title = "Optimizing double freeform surfaces for reducing deviations in ray-mapping method",
abstract = "Ray mapping method can greatly simplify the freeform illumination lens design. However, the result obtained by the ray mapping method sometimes deviates much from the design target. Therefore, we present a construction of double freeform surfaces based on nonlinear least squares and non-uniform rational B-spline surfaces (NURBS) to minimize the deviations. By this way, we can get a smooth double-freeform-surface lens with good optical performance.",
keywords = "Freeform lens, Illumination, NURBS, Optimization, optical design",
author = "Haotian Xu and Zexin Feng and Dewen Cheng and Yongtian Wang",
note = "Publisher Copyright: {\textcopyright} 2018 SPIE.; Optical Design and Testing VIII 2018 ; Conference date: 11-10-2018 Through 13-10-2018",
year = "2018",
doi = "10.1117/12.2501083",
language = "English",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Yongtian Wang and Kidger, {Tina E.} and Kimio Tatsuno",
booktitle = "Optical Design and Testing VIII",
address = "United States",
}