车灯线光源设计的数值模拟

Numerical simulation of linear source design for headlights

利用小平面镜逼近抛物面的方法研究车灯线光源的设计问题,通过在抛物面内内接小平面镜模拟抛物面反射光线的汇聚作用.统计能反射光线到指定点的小平面镜的个数,算出该点的光强.在满足测试光屏两指定点光强大小的条件下,求出使线光源总功率最小的灯丝长度,并对结果的合理性进行了分析.

The linear source design for headlights was studied by the method using small plane mirrors to approximate a paraboloid. The convergence effect of reflected light was simulated in the paraboloid connected with small plane mirrors. The number of small plane mirrors that can reflect the rays to the given point was counted, and the light intensity at the point was calculated. The optimum length of filaments with the minimum power of the light sources was then solved when the condition of the light intensity of the given point was satisfied. The rationality of the results was analyzed through some eases.