@inproceedings{f4b42619a7214f3d9284b4574ccc5f2f,
title = "Fractional optimization of illumination optics",
abstract = "In order to bound yet keep realistic optical shapes for freeform illumination optics, fractional optimization is employed. By allowing the shape variables to freely vary, optimization leads to bizarre shapes that cannot be manufactured. Therefore, fractional shape variables that are referenced to other system variables are set. Optimization of the pseudo-collimation of an LED using a hybrid optic is presented. The shape of the hybrid optic is described by non-uniform rational B-splines (NURBS). Two examples of this system are optimized: maximum transfer efficiency into an intensity distribution of ±10° and maximum transfer and uniformity over this same angular range.",
keywords = "Freeform, Hybrid optic, Illumination, NURBS, Nonimaging optics, Optical design, Optimization",
author = "Koshel, {R. John}",
year = "2008",
doi = "10.1117/12.810198",
language = "English (US)",
isbn = "9780819472816",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
booktitle = "Novel Optical Systems Design and Optimization XI",
note = "Novel Optical Systems Design and Optimization XI ; Conference date: 10-08-2008 Through 14-08-2008",
}