| 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: | Prins C, Thije Boonkkamp J, Tukker T, IJzerman W |
| Keywords: | optimization |
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.