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根据激光光源的特点,设计了一种基于蓝色半导体激光器的汽车远光灯系统。采用以Monge-Ampere方程为基础的自由曲面透镜设计,解决了激光光源能量密度高、发光面积小的问题;依据非成像光学理论,建立了透镜表面与目标面的映射关系;通过求解Monge-Ampere方程得出自由曲面上的坐标点,拟合坐标点得到自由曲面透镜模型;采用光学软件Tracepro进行了仿真分析。结果表明:照度最大值值为119.3lx,中心点照度为117.6lx,完全符合GB25991-2010标准,且光型分布均匀。
According to the characteristics of the laser light source, a kind of car high beam light system based on blue semiconductor laser is designed. Based on the Monge-Ampere equation, the free-form surface lens design solves the problem of high energy density and small light-emitting area of the laser light source. Based on the non-imaging optical theory, the mapping relationship between the lens surface and the target surface is established. The equations obtained the coordinate points on the free-form surface, and fitted the coordinate points to get the free-form lens model. The optical software Tracepro was used for the simulation analysis. The results show that the maximum illuminance value is 119.3lx, the center illuminance is 117.6lx, in full compliance with GB25991-2010 standard, and the light distribution is uniform.