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Proceedings Paper

Modeling simulation of the thermal radiation for high-speed flight vehicles' aero-optical windows
Author(s): Lei Chen; Liqin Zhang; Mingjiang Guo
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Paper Abstract

When high-speed flight vehicles fly in the atmosphere, they can generate serious aero-optical effect. The optical window temperature rises sharply because of aerodynamic heating. It will form radiation interference that can lead infrared detectors to producing non-uniform radiation backgrounds, decreasing system SNR and detection range. Besides, there exits temperature difference due to uneven heating. Under the thermo-optical and elastic-optical effects, optical windows change into inhomogeneous mediums which influence the ray propagation. In this paper, a model of thermal radiation effect was built by a finite element analysis method. Firstly, the optical window was divided into uniform grids. Then, radiation distribution on the focal planes at different angles of the window’s normal line and optical axis was obtained by tracing light rays of each grid. Finally, simulation results indicate that radiation distribution reflects the two directions-the length and width-of temperature distribution, and the change of angle causes the center of radiation distribution to shift to one direction of the image surface under the same window temperature.

Paper Details

Date Published: 15 October 2015
PDF: 8 pages
Proc. SPIE 9674, AOPC 2015: Optical and Optoelectronic Sensing and Imaging Technology, 96741L (15 October 2015); doi: 10.1117/12.2199539
Show Author Affiliations
Lei Chen, Beijing Institute of Electronic System Engineering (China)
Liqin Zhang, Beijing Institute of Electronic System Engineering (China)
Science and Technology on Special System Simulation Lab. (China)
Mingjiang Guo, Beijing Institute of Electronic System Engineering (China)

Published in SPIE Proceedings Vol. 9674:
AOPC 2015: Optical and Optoelectronic Sensing and Imaging Technology
Haimei Gong; Nanjian Wu; Yang Ni; Weibiao Chen; Jin Lu, Editor(s)

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