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Accurate characterization of full-chain infrared multispectral imaging features under aerodynamic thermal environment

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posted on 2023-04-24, 10:15 authored by Ning Yang, Ying Yuan, chao zhang, xin liu, Xiao-rui Wang, Yi Li
The detection performance of infrared imaging systems during high-speed flight is significantly impacted by aero-optical and aero-thermal radiation effects. However, traditional numerical calculations struggle to balance accuracy and efficiency, and there is a lack of a comprehensive model for infrared imaging in an aerodynamic thermal environment. In this study, we propose a calculation method based on Cellular Automata (CA) ray tracing, which allows for parallel calculation of aero-optical and aero-thermal radiation effects by combining optical field transport rules with the cellular space obtained by interpolation under fluid-solid boundary constraints. Using this method, we extend the traditional imaging feature prediction model of the infrared imaging system to obtain an accurate characterization model of the full-chain imaging features adapted to the aerodynamic thermal environment. Finally, we investigate the characteristics of infrared multispectral imaging system in various spectral bands under the influence of aero-optical and aero-thermal radiation effects. With this full-chain imaging model, the key elements of the imaging system under aerodynamic thermal environment can be globally optimized.

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Funder Name

National Natural Science Foundation of China (62075176,62005204,62005206); Fundamental Research Funds for the Central Universities

Preprint ID

105639

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