Optical and mechanical structure design of a high altitude orbits collimating infrared earth simulator

Zhe Wang; Guo-yu Zhang; Qi-meng Chen; Xiang-yang Sun; Yu-jun Gao

doi:10.1117/12.2032706

11 September 2013 Optical and mechanical structure design of a high altitude orbits collimating infrared earth simulator

Zhe Wang, Guo-yu Zhang, Qi-meng Chen, Xiang-yang Sun, Yu-jun Gao

Author Affiliations +

Proceedings Volume 8907, International Symposium on Photoelectronic Detection and Imaging 2013: Infrared Imaging and Applications; 89071O (2013) https://doi.org/10.1117/12.2032706
Event: ISPDI 2013 - Fifth International Symposium on Photoelectronic Detection and Imaging, 2013, Beijing, China

Abstract

In recent years, with the development of space technology, the infrared earth simulator that can only provide an earth angle could not meet the requirements of the calibration tests for earth sensor on the ground, then the research on infrared earth simulator which can provide a variety of earth angles has become an inevitable trend. Based on the collimated infrared earth simulator’s working principle and design requirements, aimed at these three orbit height 18000Km, 35786 Km and 42000 Km, a high altitude orbits collimating infrared earth simulator is developed by adopting the collimation and the earth diaphragm alterable project. Applied ZEMAX software to design a meniscus of germanium collimating lens, the simulation results show that the lens has a effective aperture of 240mm, provide the optimum position and diameter of the earth diaphragms correspond following three earth angles of 30.42°, 17.46° and 15.19°. Used ANSYS software to do finite element analysis for the key components of the mechanical structure. Finally, validate the deviation accuracy of flare angles and beam parallelism via theoretical analysis and practical calculation. The results indicate that the errors of three flare angles of the earth are all less than ±0.05, can meet the accuracy requirements of infrared earth simulator for infrared earth sensor’s calibration testing on the ground. Key words: Infrared earth sensor, Earth simulator, Variable angular, Germanium collimating lens

Citation Download Citation

Zhe Wang, Guo-yu Zhang, Qi-meng Chen, Xiang-yang Sun, and Yu-jun Gao "Optical and mechanical structure design of a high altitude orbits collimating infrared earth simulator", Proc. SPIE 8907, International Symposium on Photoelectronic Detection and Imaging 2013: Infrared Imaging and Applications, 89071O (11 September 2013); https://doi.org/10.1117/12.2032706

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KEYWORDS

Germanium

Infrared radiation

Infrared sensors

Sensors

Absorption

Calibration

Infrared imaging

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