用于空间目标天基红外探测的同轴光学系统杂散光抑制技术  

Stray Light Suppression of Coaxial Optical System forSpace-Based Infrared Detection of Space Target

作　　者：孟繁多 王潇 童卫明 高幸华 马文坡[1] MENG Fanduo;WANG Xiao;TONG Weiming;GAO Xinghua;MA Wenpo(Beijing Institute of Space Mechanics&Electricity,Beijing 100094,China;Beijing Institute of Control Engineering,Beijing 100094,China)

机构地区：[1]北京空间机电研究所,北京100094 [2]北京控制工程研究所,北京100094

出　　处：《红外技术》2025年第4期403-409,共7页Infrared Technology

摘　　要：空间目标天基红外探测系统在对近地轨道暗弱目标探测时,会受到来自视场外地球和大气的强烈杂散光的影响,因此,这类探测系统对杂散光抑制的要求非常高。本文围绕空间目标天基红外探测需求,在分析借鉴了国外一些天基红外探测系统的杂散光抑制技术的基础上,对用于空间目标天基红外探测的同轴光学系统的杂散光抑制技术进行了研究,提出通过在次镜背部添加中心遮光罩来进一步提升杂光抑制能力的技术途径。以SABER的同轴光学系统为例,对在次镜背部增加中心遮光罩前后的杂散光抑制能力进行了仿真,仿真结果表明在次镜背部增加中心遮光罩后,在临边探测方向上光学系统的PST明显降低,其中在离轴角5°和10°时分别降低了46%和35%。Space-based infrared detection systems for space targets are affected by strong stray light from the Earth and atmosphere outside the field of view when detecting faint targets in low Earth orbit.Therefore,such detection systems have high requirements for stray light suppression.Based on the requirements of space-based infrared detection for space targets,this study analyzes the stray light suppression technologies of several foreign space-based infrared detection systems,investigates the stray light suppression technology of coaxial optical systems used for space-based infrared detection of space targets,and proposes a technical approach to further improve stray light suppression by adding a center baffle to the back of the secondary mirror.Using SABER's coaxial optical system as an example,the stray light suppression capability was simulated before and after adding the center baffle.The simulation results show that,after adding the center baffle to the back of the secondary mirror,the point source transmittance(PST)of the optical system in the detection direction at the edge is significantly reduced by 46%and 35%when the off-axis angles are 5°and 10°,respectively.

关 键 词：空间目标 天基红外探测 同轴光学系统 杂散光抑制 中心遮光罩 

分 类 号：TP732.2[自动化与计算机技术—检测技术与自动化装置]