第20卷第7期 2012年7月
文章编号
1004-924X(2012)07-1626-10
光学精密工程
Optics and Precision Engineering
Vol.20No.7
Jul.2012
基于大气透过率比例校正的目标辐射测量
杨词银1，张建萍1，曹立华1,2
（1.中国科学院长春光学精密机械与物理研究所，吉林长春130033；
2.长春理工大学理学院，吉林长春130022）
摘要：大气透过率是影响目标辐射测量精度的重要因素，而常规通过MODTRAN等模式计算软件，由大气参数计算大气透过率的误差一般在15%以上，极大地限制了目标辅射测量精度。为此，本文提出利用某一距离的实测大气透过率和模式计算大气透过率之比得到大气透过率校正系数来对其它距离的模式计算大气透过率进行比例校正，实验显示，校正后大气透过率的精度优于8.1%，大大提高了目标辐射测量精度。利用中波红外相机和面源黑体开展了目标辐射特性测量实验，结果表明，采用MODTRAN计算大气透过率的辐射测量方法得到的目标辐射反演精度约为20%，而采
用本文方法对大气透过率校正后可将反演精度提高到10%以内。关键调：辐测量；大气透过率；面源黑体；比例校正；辐射反演
中图分类号：TP732.2
文献标识码：A
doi;10. 3788/OPE. 20122007.1626
Infraredradiationmeasurementbasedonproportional
correctedatmospherictransmittance YANG Ci-yin', ZHANG Jian-ping, CAO Li-hua
(l.ChangchunInstituteof Optics,FineMechanicsand Physics,ChineseAcademy
ofSciences,Changchun130033,China;
2.ChangchunUniversityof ScienceandTechnology,Changchun130022,China)
*Correspondingauthor，E-mail:yangciyin@sina.com
Abstract: Atmospheric transmittance is an important factor affecting the radiation measurement preci-sion. Generally, the error of conventional atmospheric transmittance calculated from atmosphere pa-rameters by using a atmosphere model calculation software such as MODTRAN is above 15%, which
method was proposed, by which the ratio between the really-measured atmospheric transmittance and the calculated one for a distance was taken to obtain an atmospheric transmittance correction coeffi-cient. Then, the correction coefficient was used to correct atmospheric transmittances of other meas-urement distances. Experiments show that the precision of the corrected atmospheric transmittance is better than 8. 1%,which improves the target radiation measurement precision greatly. A radiation measurement experiment was performed by using a midwave infrared camera and a blackbody, and the
收稿日期：2012-01-28；修订日期：2012-03-01.
基金项目：国家自然科学基金青年基金资助项目（No.61007009)