@inproceedings{8fda15377abd47eeb26571cd33540e7f,
title = "Non-uniformly sampled grids in double pole coordinate system for freeform reflector construction",
abstract = "We propose a new method to design freeform reflectors by nonuniformly sampling the source intensity distribution in double pole coordinate system. In double pole coordinate system, there is no pole for the whole hemisphere because both poles of the spherical coordinate system are moved to southernmost point of the sphere and overlapped together. With symmetric definition of both angular coordinates in the modified double pole coordinate system, a better match between the source intensity distribution and target irradiance distribution can be achieved for reflectors with large acceptance solid angle, leading to higher light efficiency and better uniformity on the target surface. With non-uniform sampling of the source intensity, we can design circular freeform reflector to obtain uniform rectangular illumination pattern. Aided by the feedback optimization, the freeform reflector can achieve the collection efficiency for ideal point source over 0.7 and relative standard deviation (RSD) less than 0.1.",
author = "Donglin Ma and Shaun Pacheco and Zexin Feng and Rongguang Liang",
note = "Publisher Copyright: {\textcopyright} 2015 SPIE.; Nonimaging Optics: Efficient Design for Illumination and Solar Concentration XII ; Conference date: 09-08-2015 Through 10-08-2015",
year = "2015",
doi = "10.1117/12.2190761",
language = "English",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Gordon, {Jeffrey M.} and Roland Winston",
booktitle = "Nonimaging Optics",
address = "United States",
}