Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1496048 | Optical Materials | 2009 | 12 Pages |
Abstract
We present a simulation procedure based on optical ray-tracing in order to optimize the angular homogeneity of the light emitted from the color conversion element (CCE) in a phosphor conversion-based white LED. The blue LED and the yellow CCE light have rather different emission characteristics; so the geometry of the CCE as well as its phosphor concentration have to be carefully adjusted in order to achieve equal irradiance and/or radiant intensity distributions on a photo-detector surrounding the LED. The simulations identify the optimal CCE geometries and material compositions in order to obtain angular homogeneity for a broad range of color temperatures.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Christian Sommer, Paul Hartmann, Peter Pachler, Marko Schweighart, Stefan Tasch, Günther Leising, Franz P. Wenzl,