Compact illumination optic with three freeform surfaces for improved beam control

Descripción (resumen): 

Multi-chip and large size LEDs dominate the lighting market in developed countries these days. Nevertheless, a general optical design method to create prescribed intensity patterns for this type of extended sources does not exist. We present a design strategy in which the source and the target pattern are described by means of “edge wavefronts” of the system. The goal is then finding an optic coupling these wavefronts, which in the current work is a monolithic part comprising up to three freeform surfaces calculated with the simultaneous multiple surface (SMS) method. The resulting optic fully controls, for the first time, three freeform wavefronts, one more than previous SMS designs. Simulations with extended LEDs demonstrate improved intensity tailoring capabilities, confirming the effectiveness of our method and suggesting that enhanced performance features can be achieved by controlling additional wavefronts.

Tipo publicación: 
JRC-SCI Magazine
Publicado en: 
Optics Express, Vol. 25, Issue 24. P.p.: 29627-29641
Ingeniería óptica
Fecha de Publicacion: 
Noviembre 2017
Autores CeDInt: 
Otros Autores: 
Simone Sorgato, Julio Chaves, Hugo Thienpont, Fabian Duerr