1m口径红外测量系统的辐射定标  

Calibration of 1m aperture infrared theodolite

作　　者：李宁[1] 张云峰[1] 刘春香[1] 曹立华[1] 郭立红[1] 

机构地区：[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

出　　处：《光学精密工程》2014年第8期2054-2060,共7页Optics and Precision Engineering

基　　金：国家自然科学基金资助项目(No.61036015)

摘　　要：为了测量空中目标的红外辐射特性,设计了一套1m口径红外测量系统的辐射定标装置。给出了红外测量系统辐射定标的数学模型,以腔型黑体和平行光管组合作为标准辐射源,建立了1m口径红外测量系统的辐射定标系统。考虑该红外测量系统的光谱响应具有选择性,若采用传统辐射定标方法易产生原理误差,故提出了一种基于光栅单色仪和标准辐射计的相对光谱标定方法。给出了该标定方法的数学模型并进行了相对光谱标定。最后,在外场以黑体作为模拟目标进行了辐射特性测量实验。结果表明,应用本文提出的辐射定标方法,1m口径红外测量系统的辐射特性测量误差最大值为9.5%,比传统方法平均减少了约8.7%,可满足实际项目指标要求,非常适合外场辐射定标的应用。To measure infrared radiation characteristics of air targets,the calibration system for a 1 m aperture infrared measurement system was designed.A mathematic model of calibration for the infrared measurement system was given and a radiometric calibration system was established by combinations of a cavity blackbody and a collimator as the standard radiation source.Because the spectral response of the infrared measuring system is selective,the calibration principle based on conventional radiometric calibration method has theoretical errors and reduces the precision of radiometric calibration.To solve the problem,a relative spectral calibration method based on a monochromator and a standard radiometer was proposed.The mathematical model was given and a relative spectral calibration was performed.Finally,the experiments on radiation characteristic measurement were performed in the field by using the blackbody as a simulated target.The results show that the measurement max error from the 1 m aperture infrared radiation characteristic measurement system is 9.5 ％ and improves by an average of 8.7 ％ as compared with that of the conventional method.These show that the proposed method meets the requirements of practical applications and is suitable for the radiometric calibration in the out-fields.

关 键 词：红外测量系统 辐射特性 辐射定标 光谱响应 单色仪 

分 类 号：TN216[电子电信—物理电子学] TH703[机械工程—仪器科学与技术]