近光灯是汽车的重要安全部件,LED近光灯已成为汽车近光灯发展的一个重要方向。从抛物面型B样条曲面出发,结合光线追迹原理及近光灯的配光标准,推算曲面的法向矢量组,进而构建满足要求的自由曲面反射器。实验模拟的结果满足近光灯的国家配光标准。 Low beam light is an important safety part of the car, LED low beam light has become an important direction for the development of automotive low beam light. Based on the parabolic B-spline surface, combining with the principle of ray tracing and the light distribution standard of low beam, a normal vector set of the surface is deduced to construct a free-form surface reflector satisfying the requirements. The results of the experimental simulation meet the national light distribution standards for low beam lamps.