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Proceedings Paper

Fractional optimization of illumination optics
Author(s): R. John Koshel
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Paper 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.

Paper Details

Date Published: 17 September 2008
PDF: 11 pages
Proc. SPIE 7061, Novel Optical Systems Design and Optimization XI, 70610F (17 September 2008); doi: 10.1117/12.810198
Show Author Affiliations
R. John Koshel, Photon Engineering, LLC (United States)
College of Optical Sciences, The Univ. of Arizona (United States)


Published in SPIE Proceedings Vol. 7061:
Novel Optical Systems Design and Optimization XI
R. John Koshel; James D. Moore Jr.; David H. Krevor; G. Groot Gregory, Editor(s)

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