为了有效地收集半导体发光二极管大范围的出射光以实现光能的高效利用,设计一款基于全内反射结构的多个自由曲面准直透镜,该透镜的初始结构是根据Snell定律和能量守恒定律等光学原理的算法设计而成。将该透镜的初始结构导入Creo软件中并进行360°旋转以得到3D实体模型,将其转入TracePro光学软件中进行蒙特卡洛光线追迹的模拟,在距离接收板20 m处接收到一个圆形光斑。对该透镜模型进行法矢修正,优化后的透镜经过模拟仿真,透射能力高达182 cd/lm,光束角为±1.621°。将优化后的透镜与传统的全内反射结构透镜进行对比,经验证发现优化后的透镜对窄光束的调控能力更好。

In this study, a multi-freeform collimating lens is designed based on a total internal reflection structure to effectively obtain a wide range of emitted light from the semiconductor light-emitting diodes to ensure efficient use of light energy. The initial structure of this type of lens is based on Snell's law and is designed using algorithms based on optical principles such as the law of conservation of energy. The initial structure of the lens is imported into the Creo software. Subsequently, a 360° rotation is performed to obtain a three-dimensional solid model. The obtained structure is transferred to the TracePro optical software for Monte Carlo ray tracing simulation. A circle spot is obtained at a distance of 20 m from the receiving board. Further, the normal vector of the lens model is corrected. The optimized lens exhibited light transmittance up to 182 cd/lm and a beam angle of ±1.621° after the simulation. Compared with the traditional total internal reflection structure lens, the optimized lens exhibits an improved ability to control narrow beams.