An inverse method for the design of TIR collimators to achieve a uniform color light beam

An inverse method for the design of TIR collimators to achieve a uniform color light beam

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Article ID: iaor20133998
Volume: 81
Issue: 1
Start Page Number: 177
End Page Number: 190
Publication Date: Aug 2013
Journal: Journal of Engineering Mathematics
Authors: , , ,
Keywords: optimization
Abstract:

Color‐over‐angle (CoA) variation in the light output of white LEDs is a common and unsolved problem. In this article we introduce a new method to reduce CoA variation using a special collimator. The method is based on analytical inverse design methods. We present a numerical algorithm to solve the differential equations arising from this method and verify the results using Monte Carlo raytracing.

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