扩展光源准直照明系统出射光束发散特性的研究  

Divergence Characteristics of Outgoing Beam from a Collimating Illumination System with an Extended Source

作　　者：康学亮 刘启隆 王丽 姚海兵[1] 肖军 张白 Kang Xueliang;Liu Qilong;Wang Li;Yao Haibing;Xiao Jun;Zhang Bai(School of Electrical&Infornmation Eugineering,North Minzu Uniersity,Yinchuau,Ningxia 750021,China;School of Mechanical Eugineering,Hefei Uniersity of Technology.Hefei,Anhui 230009,China)

机构地区：[1]北方民族大学电气信息工程学院,宁夏银川750021 [2]合肥工业大学机械工程学院,安徽合肥230009

出　　处：《激光与光电子学进展》2020年第15期75-84,共10页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(11564001);宁夏高等学校一流学科建设项目(NXYLXK2017A07)。

摘　　要：扩展光源准直照明系统的出射光束发散特性决定了其极限照明距离的大小。基于费马原理,给出了平凸准直透镜面型的解析表达式,根据成像光学相关理论推导出扩展光源条件下准直照明系统中出射光束发散角的计算公式,并进行了模拟仿真和实验验证。研究发现扩展光源准直照明系统中出射光束的发散角与光源发光区域的尺寸成正比,与准直透镜的焦距成反比,与透镜口径无关。该结论可为扩展光源准直照明系统出射光束发散角的压缩和极限照明距离的拓展提供理论依据,对探照类灯具研制中光源的选择、准直配光透镜的设计有指导意义。The limiting distance for illumination from a collimating illumination system with an extended source is determined by the divergence of the outgoing beam.Herein,the analytical expression for the surface of the plano-convex collimating lens based on Fermat's principle was obtained.The formula for calculating the divergence angle of the outgoing beam in such a system was derived according to the theory of imaging optics.Simulations and experimental validation were also conducted.Results reveal that the divergence angle of the outgoing beam from the collimating illumination system with an extended source is proportional to the source size,inversely proportional to the focal length of the collimating lens,and independent of the lens aperture.This conclusion provides a theoretical basis for compressing the divergence angle of the outgoing beam and extending the limiting distance for illumination from a collimating illumination system with an extended source.It has guiding significance for the selection of the light source and the design of the collimating lens in the development of searchlights.

关 键 词：光学设计 扩展光源 准直照明 发散特性 

分 类 号：O439[机械工程—光学工程]