摘要 设计了大口径星载激光雷达望远接收光学系统。采用离轴三反作为望远物镜,其初始结构通过计算获得,有效焦距为1000 mm,F数为1,离轴优化后各视场点列图RMS半径最大仅为18.691μm,符合设计要求。基于叶绿素获取等多种应用的需求,设计其后的准直系统焦距为50 mm,光束口径为48 mm,经由7路分光光路接收并分别成像于各自的单元探测器上。每支光路焦面接收的光斑均不超过93.992μm,小于单元探测器的接收面元1 mm×1 mm,具有较好的光能接收率。整套光学系统三维尺寸为1000 mm×1150 mm×1300 mm,其布局合理,空间利用率高,对星载激光雷达的研制具有一定的参考价值。 A large aperture optical receiver system for spaceborne lidar is designed.Off-axis three-mirror are adopted as the telescopic objective lens,its initial structure is obtained through calculation,with an effective focal length of 1000 mm and a F-number of 1.After off-axis optimization,the maximum radius of RMS of each field of view spot diagram is only 18.691 um,which meets the design requirements.based on the requirements for various applications such as chlorophyll acquisition,t he subsequent collimation system is designed with a focal length of 50 mm,a beam diameter of 48 mm.The collimation system is received by 7 beam-splitting and respectively imaging on the respective unit detectors.The spot received by the focal surface of each optical path is not more than 93.992 um,much smaller than the unit detector's receiving surface element 1 mm×1 mm,which has a better light energy receiving rate.The whole optical system has a three-dimensional size of 1000 mm×1150 mm×1300 mm,a reasonable layout,and a high space utilization rate,which is of certain reference value for the development of spaceborne lidar.
机构地区 长春理工大学光电工程学院
出处 《长春理工大学学报:自然科学版》 2021年第2期7-12,共6页 Journal of Changchun University of Science and Technology(Natural Science Edition)
基金 山东省支持青岛海洋科学与技术试点国家实验室重大科技专项(2018SDKJ0102-6)。
关键词 光学设计 星载激光雷达 离轴三反结构 多路分光系统 optical design spaceborne lidar off-axis three-mirrorstructure multi-channel beam-splitting system
