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Opt Lett. 2006 Jul 15;31(14):2193-5.

Precise optical modeling for LED lighting verified by cross correlation in the midfield region.

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  • 1Institute of Optical Sciences, National Central University, Chung-Li, Taiwan.


A novel LED modeling algorithm for precise three-dimensional light pattern simulation is proposed and demonstrated. We propose to use normalized cross correlation to verify the validity of the simulation in one-dimensional intensity patterns as well as two-dimensional irradiance patterns in various midfield distances and to provide feedback to achieve a successful model. The model is demonstrated to obtain an average of 99% in normalized cross correlation between the simulation light pattern and experimental measurement for a truncated inverse pyramid LED.

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