投射式LED汽車前照燈的光學設計

余桂英 陳曉麗 姚帥 鄭穎君
中國計量學院計量測試工程學院,浙江杭州310018摘　要:依據(jù)GB 4785-1998選擇偏藍成分較少的暖白色LED光源，采用多橢球反射杯、擋光板和非球面透鏡的投射式系統(tǒng)，設計出一套LED汽車前照燈．其中每個LED光源都有各自獨立的光學系統(tǒng)，設計了消球差的非球面透鏡和平面擋光板，模擬分析了多橢球反射杯垂直截面橢圓和水平截面橢圓的最佳焦距．采用3個單個LED光學系統(tǒng)構成近光系統(tǒng)，在近光的基礎上增加4個單個LED光學系統(tǒng)構成遠光系統(tǒng)，其近光系統(tǒng)明暗截止線很清晰且近光和遠光系統(tǒng)配光性能的模擬結果都滿足GB4599—94要求．[著者文摘]

An optical design of LED automotive headlamps based on projector systemsYU Gui-ying, CHEN Xiao-li, YAO Shuai, ZHENG Ying-jun College of Metrology and Measurement Engineering, China Jiliang University, Hangzhou 310018, ChinaAbstract:An automotine headlamp of LED based on GB4785-1998 was designed with poly-ellipsoid reflactors, shields and aspheric lens choosing a warm white LED source that contains a little of blue color. Each LED had its optical system respectively. The best focus of the poly-ellipsoid reflector＇s vertical and horizontal section ellipses was simulated. 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.[著者文摘]

Key words:optical design; LED; automotive headlamp; projector system; photometric characteristics