Study of the secondary Lens for LED Spot Light with high efficiency and high illumination uniformity

具高效率／高均勻照度LED投射燈具之二次元件設計與研究

Curtis Hsiao-Yi Lee(李孝貽)

《光學工程》 128期 (2014/12) Pp. 27-35

摘要

A free-form secondary lens is proposed to optimize an LED spot light. Based on Snell's law, energy conservation law, and a Monte Carlo ray-tracing algorithm, the surface contour of the free-form lens can be determined according to the requirements of an LED light. Optical experimental results show that the efficiency of the LED light can be achieved as 95.69% by means of the lens, and which illumination uniformity 0.317 is higher than the commercial one's 0.259. Besides the lens does not need the help of a white ring holder, so the cost of the LED light is more effective than that of the commercial ones.

關鍵字

optical design ； free-form secondary lens ； LED light ； high efficiency and high illumination uniformity

並列摘要

本文提出一發光二極體燈具的自由曲面二次透鏡，利用光全內反射的原理，透過非序列追跡光學設計軟體的光線追跡與優化搜尋演算功能，使該透鏡具備特殊的曲面與結構，在無須傳統白色反射罩的輔助下，可達成30度光強度分布角、95.69%的光學效率以及高於商業化二次元件的光照均勻度等工作目標。

並列關鍵字

光學設計 ； 自由曲面二次透鏡 ； LED燈具 ； 高光學效率以及高均勻照度