Analysis of athermalizing performance of thermal infrared optical system with Cassegrain antenna
Analysis of athermalizing performance of thermal infrared optical system with Cassegrain antenna
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DOI：
10.1016/j.ijleo.2009.05.012
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发表时间：
2010-10
期刊：
影响因子：
3.1
通讯作者：
Rui Wu;Kai Huang;Huajun Yang;Jiandong Wang;Yi-dong Liu
中科院分区：
文献类型：
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作者：
Rui Wu;Kai Huang;Huajun Yang;Jiandong Wang;Yi-dong Liu
热红外成像系统是现代光学中的重要组成部分，成像质量的好坏与光学系统的精度密切相关。热引起的镜面变形严重影响了光学天线系统的传输性能，进一步降低了整个系统的精度。本文利用有限元分析软件Ansys对透镜在热环境下的变形情况进行了模拟。研究了反射式和折射式卡塞格伦光学天线的热效应引起的焦移特性，得出了卡塞格伦光学天线系统的隔热性能。该工作为热红外光学系统的精确设计提供了方向。
The thermal infrared imaging system is of greatest importance in modern optics and the image quality closely relies on the accuracy of the optical system. Heat-induced mirror deformation influences the transmission performance of the optical antenna system significantly, which further degrades the accuracy of the whole system. In this work, the simulation on lens deformation circumstances under the thermal environment is carried out using the finite-element analysis software ANSYS. The focus shift property caused by the thermal effect is studied in the cases of reflective and refractive Cassegrain optical antennas, and the athermalizing performance of Cassegrain optical antenna system is also concluded. This work presents a direction to accurate designing of the thermal infrared optical system.