基于非成像光学设计的自由表面光学系统,对提高以LED为核心的固态半导体照明的性能起着至关重要的作用。文章提出了简化模型模拟一次封装白光LED光源的色温角分布特性,并研究了自由表面光学系统对该色温角分布特性的影响。仿真与实验结果都表明,自由表面光学系统可以明显改善白光LED光源的色温角分布不均匀特性。
Freeform optical system based on non-imaging optics design method is essential to improve the performance of solid state lighting. A simplified model is proposed in this paper to simulate the color temperature angular distribution of first packaged white LED source, and the effect of freeform optical system on this angular distribution is studied. Both simulation and experimental results show that the distribution uniformity can be significantly improved after installing the freeform optical system.