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高温目标偏振特性数值仿真研究
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Abstract:
随着人类对宇宙的探索逐渐加深，飞行器更频繁往返于太空与地球之间，再穿过大气层时温度会迅速升高，对传统的光强探测技术造成困扰。为克服该问题，本文结合菲涅尔方程以及热光系数对高温目标的自发辐射偏振特性进行了初步的理论分析和建模仿真，并研究了在特定参数高温目标的自发辐射偏振规律。研究结果表明：高温目标自发辐射发射率平行分量和垂直分量随发射角和温度的变化趋势不一致，但是偏振度随温度(发射角为0？时除外)的升高和发射角增大整体呈现上升趋势。
With the gradual deepening of human exploration of the universe, aircraft travels between space and the earth more frequently, and the temperature will rise rapidly when passing through the atmosphere, which has caused problems for traditional light intensity detection technology. In order to overcome this problem, this paper combines Fresnel equation and thermo-optical coefficient to carry out a preliminary theoretical analysis and modeling simulation of the spontaneous radiative polarization characteristics of high-temperature targets, and studies the spontaneous radiative polarization laws of high-temperature targets with specific parameters. The results show that the parallel and vertical components of the spontaneous emission emissivity of high-temperature targets have different trends with the emission angle and temperature, but the degree of polarization increases with the increase of temperature (except when the emission angle is 0？) and the emission angle increases.
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