LED光源具有寿命长、点亮速度快、节能等优点,非常适合作为新一代的汽车前照灯的主要光源。研究了使用LED光源和多椭球反射镜的投射式前照灯的设计方法,建立了光学系统模型。阐述了反射镜、挡板、透镜的设计思想。采用Cree xre-7090 LED作为光源,并在此基础上采用ASAP进行了计算机模拟。结果表明,可产生宽广但不高的光型,明暗截止线清晰。 LED light with long life, light speed, energy saving, etc., is very suitable as a new generation of automotive headlamps main light source. The design method of projection headlamp using LED light source and multi-ellipsoidal reflector was studied, and the optical system model was established. Described the mirror, baffle, lens design. Cree xre-7090 LED was used as a light source, and computer simulation was carried out by using ASAP. The results show that can produce broad but not high light type, cut-off line clear.