中国激光, 2014, 41 (s1): s116005, 网络出版: 2014-07-03
地球静止轨道相机SBIRS GEO-1光机结构的设计与仿真
Opt-Mechanical System Design and Simulation of SBIRS GEO-1 a Geostationary Camera
成像系统 光机系统 短轴施密特结构 可展开外遮光罩 imaging systems opt-mechanical system short-axis Schmitt structure deployable outer sunshield
摘要
天基红外预警卫星系统是美国构建空间防御体系的重要组成部分，首颗静轨卫星SBIRS GEO-1于2011年5月发射升空。为美国及其盟国提供全球范围内高时间分辨率和空间分辨率的红外监视、导弹预警等。通过对SBIRS GEO-1卫星光机系统的调研，实现改进型短轴施密特光学结构的设计仿真，成像质量接近衍射极限，奈奎斯特频率处（14.3 lp/mm）全谱段调制传递函数(MTF)设计平均值为0.847；并就其可展开式外遮光罩进行论证，分析了不同时刻对太阳杂光和外热流的抑制效果，满足系统设计要求。研究内容为我国空间探测红外成像系统的研制提供了一定的参考。
Abstract
Space based infrared system (SBIRS) is an important part of American′s space defense system, the first of which is called SBIRS GEO-1, in geostationary orbit, launched in May 2011. GEO-1 provides infrared detective and missile warning etc. With high resolution and real-time observing in worldwide. An improved short-axis Schmitt optical structure is designed and simulated based on the study of SBIRS GEO-1 opt-mechanical. Its image quality approaches diffraction limit, with average value of modulation transfer function (MTF) designed spectrum of 0.847 at the Nyquist frequency (14.3 lp/mm). Besides, the deployable outer sunshield servo system is demonstrated, the inhibitory effect of sun stray-light and external thermal flux are analyzed in different time. The results can meet system design requirements. The GEO-1 study provides a certain reference for the infrared imaging system development of our space exploration.
王威, 陈凡胜, 崔坤, 蒋范明. 地球静止轨道相机SBIRS GEO-1光机结构的设计与仿真[J]. 中国激光, 2014, 41(s1): s116005. Wang Wei, Chen Fansheng, Cui Kun, Jiang Fanming. Opt-Mechanical System Design and Simulation of SBIRS GEO-1 a Geostationary Camera[J]. Chinese Journal of Lasers, 2014, 41(s1): s116005.
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