基于LED和复眼透镜的自适应前照灯的光学设计  

Optical Design of the Adaptive Front Lighting System Based on the LED and the Fly′s-Eye Lens

作　　者：王程[1] 朱向冰[1] 田丽伟[1] 郝文良[1] 王若飞 

机构地区：[1]安徽师范大学物理系,安徽芜湖241000 [2]奇瑞新能源汽车技术有限公司,安徽芜湖241009

出　　处：《激光与光电子学进展》2015年第4期167-173,共7页Laser & Optoelectronics Progress

基　　金：安徽省科技攻关项目(1301022058)

摘　　要：针对现有自适应前照灯技术存在的照明模式少、对光线控制不精准、光能利用率低和散热难度大等缺点,提出一种基于发光二极管(LED)和复眼透镜的自适应前照灯设计方案,以数字微镜为核心,利用复眼透镜在数字微镜上形成均匀且具有明暗截止线的光斑,并用复合抛物面聚光器(CPC)和弯形导光管收集多余的光线重新利用,通过控制数字微镜上微镜的翻转位置和翻转频率实现欧洲经济委员会(ECE)标准中"近光(Passing beam)"的4种照明模式。仿真结果表明:4种照明模式的平均光能利用率为43.62%,配光结果满足ECE R123标准,数字微镜上有59.46%的微镜工作且没有微镜一直处于"OFF"态,光能利用率高,散热难度小。Some limitations are involved in traditional adaptive front lighting system （AFS） such as fewer modes, low control accurateness, low light efficiency and hard heat dissipation, etc. This paper proposes an optical scheme of the AFS based on the LED and the fly＇s-eye lens. Using a fly＇s-eye lens, the uniform facula with a cut-off line can be achieved in the digital micro mirror （DMD）. And the compound parabolic concentrator （CPC） and the bent light pipe are used to collect extra light. By controlling the flip position and the flip frequency of the mirrors of the DMD, the passing beam can be achieved. The simulation results show that the average light efficiency of this system is 43.62%. The results of the light distribution can meet the requirements of the ECE R123. In the DMD, 59.46% mirrors work and none of the mirrors is in the ＂OFF＂ status. Moreover, this system enjoys the features of high light efficiency and less heat dissipation.

关 键 词：光学设计 自适应前照灯 发光二极管 数字微镜 复眼透镜 光能利用率 

分 类 号：O439[机械工程—光学工程]