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The optimal use of energy resources is the central dogma for green technology and bio-optics. Reflectors provide a simple and fundamental structure for energy transport from a light emitting diode (LED) chip, and an appropriately designed reflector can reduce the fabrication cost of secondary optics for the LED. This paper demonstrates the role of three proposed reflector geometric factors in the two performance metrics - uniformity and collected energy (power), for designing LED reflectors. Through canonical factor analysis, a linear structure equation for LED reflector is suggested, and the methodology for designing the optimal shape is discussed. In addition, a generalized factor and a synthesis response are proposed for a more comprehensive investigation of optical performance. Results indicate a key parameter for balancing the optical performance, and the effects of various parameters and the trade-offs are revealed. [ABSTRACT FROM AUTHOR]

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%.