摘要
基于大功率LED芯片的类朗伯体发光特性、GB 25991—2010标准要求和非成像光学理论,设计了一套由变截面椭球体反射器、挡板和自由曲面透镜组成的投射式LED前照灯近光系统。采用Monte-Carlo光学追迹法进行仿真分析,并加工了近光灯样件,测试其配光性能。结果表明:由变截面椭球体反射器、斜切角度为17°的挡板和具有能量分配功能的自由曲面透镜组成的LED汽车近光灯有利于形成"水平方向宽,垂直方向窄"的近光光型和清晰的明暗截止线;各主要测试点及区域的照度值满足标准的限值要求,且该系统的光能利用率相对于传统近光灯系统提高近10%。
A projection type LED headlamp low-beam consists of muti-ellipsoid reflectors, baffles and free surface lens is designed based on the approximate lambertian emitting characteristics of LED chips, provisions in GB 25991-2010 and non-imaging optics theory. The simulation has been done based on Monte-Carlo optical tracing method and the light distribution performance of a headlamp sample has been process. The results show that the muff-ellipsoid reflectors, 17 degree oblique angle of the baffles and the free surface lens are easy to form not only the low-beam light type which is wide in horizontal direction and narrow in vertical direction but also the clear cut-off line. The low-beam system meet the standard requirements, and the energy utilization rate increases nearly 10%.
出处
《照明工程学报》
2016年第1期91-95,共5页
China Illuminating Engineering Journal
基金
江苏省动力机械清洁能源与应用重点实验室资助项目(编号:QK12001)
江苏省高校优势学科建设项目(苏政办发〔2011〕6号)
江苏大学高级人才科研启动基金资助项目(编号:5503000025)
