车灯线光源的优化设计

Optimization Design for Lineal Light

本文研究了一车灯反射光在测试屏上的光强分布,并给出了在一定的设计规范下,使车灯线光源功率最小的设计方案。我们采用计算机作数值模拟,把线光源分割为点光源,将反射面划分成小块,求出点光源发出的光线经过小块反射到测试屏上的区域位置和强度,经叠加得到该点光源在测试屏上的光强分布,最后求出线光源在该屏上的光强分布。利用以上方法,我们求得在同一设计规范下,线光源功率最小时的长度为3.98～4.02毫米。

In this paper, a reflection model for lineal light is presented and the intensity distribution is exactly calculated, We divide the lineal light into point light and the revoluting paraboloid into tiny flat mirrors. By analytical calculation, the differential unit model is developed according to the reflection laws. Through numerical simulation, we conclude that the optimized length of lineal light in the specific design code is 3 . 98-4. 02mm,