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Most LED luminaires encounter the problem of color non-uniformity in illumination fields. In order to address the issue, we propose a ripple TIR lens, which can apply to both phosphor-converted LEDs and multicolor LED arrays and achieves good color performance. The ripple TIR lens consists of a collimator and a ripple panel. Simulation results based on a precise phosphor-converted white LED model...
In this paper, a novel method is proposed to design the first order lens of the packaging module of LEDs. The first order lens consists of a total internal reflector (TIR) and two freeform surfaces. Height of the first order lens is 8mm. The diameter of its maximum caliber is 6mm. Light rays with lager emitting angles will be collimated by TIR, freeform surface 1 will collimate light rays within smaller...
Total Internal Reflection (TIR) lenses are optical components which are used to collimate the light. Desired uniform illumination within a limited beam angle is easy to be achieved by integrating LEDs with TIR lenses. However, most TIR designs do not pay attention to the color uniformity, an increasing important issue for the quality of lighting, and have a considerable dimension, which also limits...
LED's luminous efficiency increases rapidly in recent years, many novel illumination applications with LEDs are emerging. Based on the analysis of LED's characteristics, our optimization scheme and design methods for LED taxiway lamps are proposed. A novel LED lamp using in navigation of the taxiway of the airport is designed as an example. The simulation results demonstrate that the light utilization...
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