15 October 2015 Modeling simulation of the thermal radiation for high-speed flight vehicles' aero-optical windows
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Proceedings Volume 9674, AOPC 2015: Optical and Optoelectronic Sensing and Imaging Technology; 96741L (2015) https://doi.org/10.1117/12.2199539
Event: Applied Optics and Photonics China (AOPC2015), 2015, Beijing, China
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.
© (2015) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Lei Chen, Lei Chen, Liqin Zhang, Liqin Zhang, Mingjiang Guo, Mingjiang Guo, } "Modeling simulation of the thermal radiation for high-speed flight vehicles' aero-optical windows", Proc. SPIE 9674, AOPC 2015: Optical and Optoelectronic Sensing and Imaging Technology, 96741L (15 October 2015); doi: 10.1117/12.2199539; https://doi.org/10.1117/12.2199539
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