Color uniformity in spotlights optimized with reflectors and TIR lenses

Descripción (resumen): 

We analyze the color uniformity in the far field of spotlight systems to estimate visual perception with a merit function derived from human factor experiments. A multi-colored light-emitting diode (LED) light engine with different light mixing levels is combined with several reflectors and total internal reflection (TIR) lenses. The optimized systems are analyzed at several color uniformity levels with regard to the efficiency, peak luminous intensity and dimensions. It is shown that these properties cannot all be optimized at the same time. Furthermore, excellent color uniformity can be reached by a light mixing layer in the light engine or by adding mixing elements to the secondary optics.


Tipo publicación: 
Revistas JRC-SCI
Publicado en: 
Optics Express, Vol. 23, 3, pp. A118-A123
ISBN/ISSN: 
1094-4087
Ingeniería óptica
Fecha de Publicacion: 
Enero 2015
Autores CeDInt: 
Otros Autores: 
Anne Teupner , Krister Bergenek, Ralph Wirth