《LED汽车近光灯设计》-毕业论文.doc

l l l LED汽车近光灯设计 摘 要 LED光源作为汽车照明系统的一门关键技术，LED汽车近光灯的配光设计是一个具有挑战性的研究课题。依据GB 4785-1998选择偏蓝成分较少的暖白色LED光源，采用多椭球反射杯、挡光板和非球面透镜的投射式系统，设计出一套LED汽车前照灯。其中每个LED光源都有各自独立的光学系统，设计了消球差的非球面透镜和平面挡光板，模拟分析了多椭球反射杯垂直截面椭圆和水平截面椭圆的最佳焦距。采用3个单个LED光学系统构成近光系统，通过光学软件Tracepro反复调用不同的模型来追迹光线得到最后的配光效果。在近光的基础上增加4个单个LED光学系统构成远光系统，其近光系统明暗截止线很清晰且近光和远光系统配光性能的模拟结果都满足GB 4599-94要求。 关键词：LED汽车前照灯，投射式系统，配光性能，光学设计 Design of Automotive Headlamp with LED ABSTRACT As a key technique on automotive lighting system, light distribution design of LED automotive headlamp is a challenging research subject. An automotive headlamp of LED based on GB4785-1998 was designed with poly-ellipsoid reflectors, shields and aspheric lens choosing a warm white LED source that contains a little of blue color. Each LED has its optical system respectively. The best focus of the poly-ellipsoid reflectors vertical and horizontal section e1lipses was simulated. The paper uses three single LED optical systems to constitute the automotive headlamp systems. The final results were achieved by using Tracepro after calling different lens model iteratively. A higher beam lamp of four LED systems was constructed in the system of lower beam lamps. The photometric result accords with GB4599-94 when the lower and higher learn lamps were simulated. KEY WORDS: LED automotive headlamp, project system, photometric characteristics, optical design 目 录 TOC \o 1-3 \h \u HYPERLINK \l _Toc7326 摘 要 PAGEREF _Toc7326 I HYPERLINK \l _Toc17519 ABSTRACT PAGEREF _Toc17519 II HYPERLINK \l _Toc3032 1 绪论 PAGEREF _Toc3032 1 HYPERLINK \l _Toc10660 1.1 LED汽车近光灯的研究现状和发展趋势 PAGEREF _Toc10660 1 HYPERLINK \l _Toc21848 1.2 论文的主要研究内容 PAGEREF _Toc21848 1 HYPERLINK \l _Toc16937 2 LED汽车灯具基础知识 PAGEREF _Toc16937 2 HYPERLINK \l _Toc28251 2.1 发光二极管简介 PAGEREF _Toc28251 2 HYPERLINK \l _Toc2692 2.2 汽车近光灯概述 PAGEREF _Toc2692 3 HYPERLINK \l _Toc10690 2.2.1 汽车近光灯 PAGEREF _Toc10690 3 HYPERLINK \l _Toc12042 2.2.2 灯具的国家标准 PAGEREF _Toc12042 4 HYPERLINK \l _Toc31643 2.2