Search

The article presents a study which discusses the solid-state light sources model of phosphor-based light-emitting diode (LED). The study uses the ray tracing procedure along with the suitable LED emission apodization pattern checked through the signal-to-noise ratio examination on the illuminating plane and color coordinates determined by energy ratios. The study revealed that the illumination and color patterns can be restored, however, several factor influence the color distribution of LED.

A conference paper about the uniformity improvement of the light emitting diode (LED) illumination system is presented. It compares the three different types of lens such as the hemispheroid, unoptimized and the lens after optimization. It discusses the non-spherical lens design approach used to optimize and improve the extraction energy and the spatial uniformity of the LED illumination system. It reveals that the new developed lens can improve uniformity from 28.4% to 64%.