12 September 2014 LED source modeling and rayset generation from luminance maps
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Abstract
In the solid-state lighting industry, optical components are designed using simulation of Light Emitting Diodes (LEDs). The accuracy of the simulation depends on a reliable LED source model. Several commercial products measure LEDs by taking photographs and generate source models comprised of rayset dat. However, little is published about the details of how rayset data are generated, and such details are often proprietary. Optical engineers and the solid-state lighting industry can benefit from a deeper understanding of the assumptions and limitations of currently available LED measurement systems. This paper details one process for generating rayset data from a series of photographs of an LED. It also discusses the assumptions and limitations of rayset generation. The quality of a rayset is limited by mechanical precision of the measurement process, angular resolution of the measurements, and the rays4et generation algorithm.
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Peter Goldstein, "LED source modeling and rayset generation from luminance maps", Proc. SPIE 9193, Novel Optical Systems Design and Optimization XVII, 91930H (12 September 2014); doi: 10.1117/12.2060255; https://doi.org/10.1117/12.2060255
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