基于大气程辐射比例修正的红外辐射特性测量

发布时间：2019-04-30 14:13

【摘要】：大气程辐射是影响目标红外辐射特性测量精度的重要因素之一。本文利用大气程辐射修正因子修正大气程辐射值以提高其测量精度。首先,给出目标红外辐射特性测量模型,然后,提出利用大气程辐射修正因子的目标红外辐射特性测量方法。该方法将一定距离下实际测量的大气程辐射和MODTRAN计算的大气程辐射之比定义为大气程辐射修正因子,最后利用该修正因子对其他距离的MODTRAN计算的大气程辐射进行修正并进行目标的辐射反演,获得目标辐射特性。本文利用中波红外摄像机和小面源黑体开展目标红外辐射特性测量实验。实验结果表明,本文方法较传统方法可以在一定程度上提高目标辐射特性测量精度,将精度提高2%左右。
[Abstract]:Atmospheric range radiation is one of the important factors affecting the measurement accuracy of infrared radiation characteristics of target. In this paper, the correction factor of atmospheric range radiation is used to modify the atmospheric range radiation value in order to improve its measuring accuracy. Firstly, the measurement model of infrared radiation characteristics of target is given, and then, the measurement method of infrared radiation characteristics of target using the correction factor of large gas range radiation is proposed. In this method, the ratio of the actual measured large range radiation at a certain distance to that calculated by MODTRAN is defined as the correction factor of the atmospheric range radiation. Finally, the correction factor is used to modify the large gas range radiation calculated by other distance MODTRAN and the radiation inversion of the target is carried out, and the radiation characteristics of the target are obtained. In this paper, a mid-wave infrared camera and a small area source blackbody are used to measure the infrared radiation characteristics of the target. The experimental results show that the proposed method can improve the measurement accuracy of target radiation characteristics to a certain extent and increase the accuracy by about 2% compared with the traditional method.
【作者单位】：中国科学院长春光学精密机械与物理研究所;中国科学院大学;
【分类号】：TN21

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