基于大气程辐射比例修正的红外辐射特性测量
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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。
Atmospheric path radiation is one of the important factors affecting the measurement precision of target infrared radiation characteristics. The atmospheric path radiation was corrected by using correction factor to improve the measurement precision. Firstly,the measuring model of target infrared radiation characteristics was established. Then,the measuring method of target infrared radiation characteristics based on the correction factor of atmospheric path radiation was proposed. The ratio of the really-measured atmospheric transmittance at a certain distance and the one calculated by using MODTRAN is called the correction factor of atmospheric path radiation. Finally,the atmospheric path radiations calculated by MODTRAN at other distances were corrected by the correction factor,and target radiation was inversed to obtain target radiation characteristics. Some measuring experiments of target infrared radiation characteristics were performed by using a medium wave infrared camera and a black body. The results show that the radiation measuring precision obtained by using proposed method is improved comparing with that obtained by using the conventional method. The precision is improved about 2 %.
Atmospheric path radiation is one of the important factors affecting the measurement precision of target infrared radiation characteristics. The atmospheric path radiation was corrected by using correction factor to improve the measurement precision. Firstly,the measuring model of target infrared radiation characteristics was established. Then,the measuring method of target infrared radiation characteristics based on the correction factor of atmospheric path radiation was proposed. The ratio of the really-measured atmospheric transmittance at a certain distance and the one calculated by using MODTRAN is called the correction factor of atmospheric path radiation. Finally,the atmospheric path radiations calculated by MODTRAN at other distances were corrected by the correction factor,and target radiation was inversed to obtain target radiation characteristics. Some measuring experiments of target infrared radiation characteristics were performed by using a medium wave infrared camera and a black body. The results show that the radiation measuring precision obtained by using proposed method is improved comparing with that obtained by using the conventional method. The precision is improved about 2 %.
引文
[1]SUN Zhiyuan,ZHU Wei,QIAO Yanfeng,et al.Atmosphere amending research in infrared radiation characteristic measurement[J].Laser&Infrared,2010,40(2):163-165.(in Chinese)孙志远,朱玮,乔彦峰,等.红外辐射特性测量中环境影响的修正研究[J].激光与红外,2010,40(2):163-165.
[2]LI Yunhong,ZHANG Long,WANG Yannian,et al..Second calibration of atmospheric transmission coefficient on temperature measurement of infrared thermal imager in fields[J].Optics and Precision Engineering,2010,18(10):2144-2147.(in Chinese)李云红,张龙,王延年,等.红外热像仪外场测温的大气透过率二次标定[J].光学精密工程,2010,18(10):2144-2147.
[3]LIU Junchi,LI Hongwen,WANG Jianli,et al..Measurement of mid-infrared total atmospheric transmittance and its error analysis[J].Optics and Precision Engineering,2015,23(6):1548-1557.(in Chinese)刘俊池,李洪文,王建立,等.中波红外整层大气透过率测量及误差分析[J].光学精密工程,2015,23(6):1548-1557.
[4]YANG Ciyin,ZHANG Jianping,CAO Lihua,et al.Infrared radiation measurement based on real-time correction[J].Infrared Millim.Waves,2011,30(3):284-288.(in Chinese)杨词银,张建萍,曹立华,等.基于实时标校的目标红外辐射测量新方法[J].红外与毫米波学报,2011,30(3):284-288.
[5]LI Ning,YANG Ciyin,CAO Lihua,et al.Radiance calibration for 3~5μm infrared focal plane array[J].Optics and Precision Engineering,2011,19(10):2319-2325.(in Chinese)李宁,杨词银,曹立华,等.3~5μm红外焦平面阵列的辐射定标[J].光学精密工程,2011,19(10):2319-2325.
[6]WANG Xiangyang,CHEN Zuolong,JIN Yinzhe,et al.Research in method of measurement of infrared radiation for target[J].Weapon test,2013,(4):41-44.(in Chinese)汪向阳,陈佐龙,金银哲,等.目标红外辐射特性测量方法探讨[J].兵器实验,2013,(4):41-44.
[7]YANG Ciyin,CAO Lihua,et al.Radiation calibration and error analysis for a large-aperture infrared opto-electric system[J].Infrared and Laser Engineering,2011,40(9):1624-1628.(in Chinese)杨词银,曹立华,等,大口径红外光电系统辐射定标及误差分析[J].红外与激光工程,2011,40(9):1624-1628.
[2]LI Yunhong,ZHANG Long,WANG Yannian,et al..Second calibration of atmospheric transmission coefficient on temperature measurement of infrared thermal imager in fields[J].Optics and Precision Engineering,2010,18(10):2144-2147.(in Chinese)李云红,张龙,王延年,等.红外热像仪外场测温的大气透过率二次标定[J].光学精密工程,2010,18(10):2144-2147.
[3]LIU Junchi,LI Hongwen,WANG Jianli,et al..Measurement of mid-infrared total atmospheric transmittance and its error analysis[J].Optics and Precision Engineering,2015,23(6):1548-1557.(in Chinese)刘俊池,李洪文,王建立,等.中波红外整层大气透过率测量及误差分析[J].光学精密工程,2015,23(6):1548-1557.
[4]YANG Ciyin,ZHANG Jianping,CAO Lihua,et al.Infrared radiation measurement based on real-time correction[J].Infrared Millim.Waves,2011,30(3):284-288.(in Chinese)杨词银,张建萍,曹立华,等.基于实时标校的目标红外辐射测量新方法[J].红外与毫米波学报,2011,30(3):284-288.
[5]LI Ning,YANG Ciyin,CAO Lihua,et al.Radiance calibration for 3~5μm infrared focal plane array[J].Optics and Precision Engineering,2011,19(10):2319-2325.(in Chinese)李宁,杨词银,曹立华,等.3~5μm红外焦平面阵列的辐射定标[J].光学精密工程,2011,19(10):2319-2325.
[6]WANG Xiangyang,CHEN Zuolong,JIN Yinzhe,et al.Research in method of measurement of infrared radiation for target[J].Weapon test,2013,(4):41-44.(in Chinese)汪向阳,陈佐龙,金银哲,等.目标红外辐射特性测量方法探讨[J].兵器实验,2013,(4):41-44.
[7]YANG Ciyin,CAO Lihua,et al.Radiation calibration and error analysis for a large-aperture infrared opto-electric system[J].Infrared and Laser Engineering,2011,40(9):1624-1628.(in Chinese)杨词银,曹立华,等,大口径红外光电系统辐射定标及误差分析[J].红外与激光工程,2011,40(9):1624-1628.