反射式发光二极管汽车前照灯的优化设计

余桂英; 金骥; 朱旭平; 林敏

doi:doi:10.3788/cjl200936s2.0112

中国激光, 2009, 36 (s2): 112, 网络出版: 2009-12-30

反射式发光二极管汽车前照灯的优化设计

Optimal Design of Reflective Light Emitting Diode Automotive Headlamps

论文大纲

余桂英 ^*金骥朱旭平林敏

作者单位

中国计量学院计量测试工程学院,浙江杭州 310018

光学设计汽车前照灯发光二极管反射器优化设计 optical design headlamp light emitting diode reflector optimal design

摘要

针对当前发光二极管(LED)灯具的高效率要求和汽车前照灯出射光束特点,根据非成像光学理论建立了新型LED抛物反射器优化设计的理论模型,实现了反射杯光能利用率的最大化和前灯出射光束的不对称光强分布,进而依据该模型设计了新型反射式LED汽车前照灯光学系统。利用TracePro软件对所设计的系统进行光线追迹仿真,结果表明不考虑反射率损失时的反射器光能利用率可达96%以上,在25 m测试屏上近光出射光型具有鲜明的截止线,左右视野宽度大于15 m;远、近光分布符合国标要求,且整灯外形结构尺寸仅为160 mm×80 mm×30 mm。

Abstract

For the requirement of high efficiency light emitting diode (LED) luminaries and the characteristics of automotive headlamp exit beam,based on non-imaging optical theory,a theory model for new type LED parabolic reflector optimal design is established to maximize the utilization of light energy of the reflection cup and to realize the asymmetric light intensity distribution of the headlamp exit beam. An optical system of new type reflective LED automotive headlamp is designed. By TracePro simulation it shows that the geometry collection rate of reflector reaches up to 96% without considering the loss. In the screen that places at 25 m the width of the field of view is greater than 10 m. The emitting light distribution of low-beam has a distinct cut-off line and the light distribution of high and low beam are both satisfying the national standard,with the structure size of entire lamp only 160 mm×80 mm×25 mm.

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余桂英, 金骥, 朱旭平, 林敏. 反射式发光二极管汽车前照灯的优化设计[J]. 中国激光, 2009, 36(s2): 112. Yu Guiying, Jin Ji, Zhu Xuping, Lin Min. Optimal Design of Reflective Light Emitting Diode Automotive Headlamps[J]. Chinese Journal of Lasers, 2009, 36(s2): 112.

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