摘要
激光光束的高方向性导致其激发荧光粉产生的蓝光和黄光在空间强度分布上存在明显差异,从而显著降低了光源的空间色温均匀性。针对这一问题,文章提出一种基于微透镜阵列匀化系统和微结构荧光粉层的激光白光光源。该方案通过改变蓝光的空间强度分布,实现蓝光和黄光的均匀混合。测试结果表明,该光源的角色温偏差为630 K,相比传统的激光直接聚焦于荧光粉层表面的激光白光光源和仅采用微透镜阵列匀化系统的激光白光光源分别降低了10170 K和1070 K。此外,该光源的光通量为1458 lm,发光效率达138 lm/W,相对色温为5226 K,显色指数为71.1,满足汽车前照灯光源的标准要求。
The laser beam has high directionality,which results in a mismatch between the spatial intensity distribution of blue and yellow lights produced by its excitation of phosphor,and leads to poor CCT uniformity.To address this issue,we propose a laser-diode-based white light source incorporating a microlens array-homogenized microstructure phosphor system(MLA-HMPS).It achieves uniform mixing of blue and yellow light by changing the spatial intensity distribution of the blue light.The experimental results show that the CCT deviation of a white light source with the proposed MLA-HMPS is 630 K.Compared with corresponding deviations with a direct laser planar phosphor system and microlens array homogenized planar phosphor system,this value is lower by 10170 and 1070 K,respectively.The white light source exhibits a luminous flux of 1458 lm,an efficiency of 138 lm/W,a CCT of 5226 K,and a color rendering index of 71.1,thereby meeting the application requirements of automotive headlights.
作者
谢彤彤
单映霞
王洪
XIE Tongtong;SHAN Yingxia;WANG Hong(Engineering Research Center for Optoelectronics of Guangdong Province,South China University of Technology,Guangzhou 510640,CHN;School of Physics and Optoelectronics,South China University of Technology,Guangzhou 510640,CHN;Zhongshan Institute of Moderm Industrial Technology,South China University of Technology,Zhongshan 528437,CHN)
出处
《半导体光电》
北大核心
2025年第4期616-623,共8页
Semiconductor Optoelectronics
基金
广东省重点领域研发计划重大项目(2020B010171001)
中山市科技发展专项资金重大项目(2023A4002)。
