基于微透镜阵列的大面积LED阵列光源匀化方法  

Light Source Homogenization Method for Large-Area LED Array Based on Microlens Array

作　　者：聂娟 杜佳林 李凡星[1] 王思沫 杨帆[1] 谌庆荣 亓波[1] 严伟[1] Nie Juan;Du Jialin;Li Fanxing;Wang Simo;Yang Fan;Chen Qingrong;Qi Bo;Yan Wei(Institute of Environmental Optics,Institute of Optics and Electronics,Chinese Academy of Sciences,Chengdu 610209,Sichuan,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院光电技术研究所环境光学研究院,四川成都610209 [2]中国科学院大学,北京100049

出　　处：《激光与光电子学进展》2023年第15期345-351,共7页Laser & Optoelectronics Progress

基　　金：四川省重点研发项目(2022YFG0223,2022YFG0249);四川省科技创新苗子工程资助项目(2021JDRC0089,2022102);中国科学院科研仪器设备研制项目(YJKYYQ20210041)。

摘　　要：LED阵列光源凭借其高亮度、长寿命及节能环保等独特优点广泛应用于医学、微纳加工、光学成像等领域,但其匀化系统存在光线准直难、可实现的照明光斑面积小等问题,难以在需要均匀照明的光学领域当中得到广泛应用。针对这一问题,提出了一种基于微透镜阵列的大面积LED阵列光源匀化方法。首先通过矩阵光学及近轴光学理论进行理论分析,然后利用lighttools软件进行系统设计及仿真实验,最终在像面上实现了大面积的均匀光斑。相较于以往最多可实现50 mm×50 mm的匀化光斑,该匀化系统可做到104 mm×104 mm、均匀度为87.375%的大面积规则的均匀光斑,该方法对医学、红外夜视、投影显示、航空照明领域等需要大面积均匀照明的系统有着重要意义。LED array light sources are widely used in medicine,micro-nano processing,optical imaging,and other fields due to their high brightness,long life,energy savings,and environmental protection.However,their homogenization system has issues such as difficult light collimation and small achievable illumination spot area,making them difficult to be widely used in the optical field that requires uniform illumination.To address this issue,this paper proposes a microlens array based large-area LED array light source homogenization method.First,the theoretical analysis is performed by matrix optics and near-axis optics theory,and then the system design and simulation experiments are conducted by using light tools software.Finally,a large-area of the uniform spot is achieved on the image surface.Compared with the previous homogenization system,which can achieve up to 50 mm×50 mm,the homogenization system can achieve a uniform spot of 104 mm×104 mm,and uniformity of 87.375% of the large-area rule.This method is of great significance systems that require large-area uniform illumination in the fields of medicine,infrared night vision,projection display,and aerial lighting.

关 键 词：光电子学 光源匀化方法 矩阵光学 微透镜阵列 大面积LED 

分 类 号：O436[机械工程—光学工程]