摘要
通过对辐射定标过程的全面分析,指出了绝对辐射定标和相对辐射定标之间的不确定性传递关系。其中,相对辐射定标方法选取多点辐射定标,绝对定标方法选取"标准灯-漫反板-积分球"的定标流程。以这组相对、绝对辐射定标链路为模型,给出了该辐射定标链路的综合不确定性的表达式,并分析了该表达式中由相对辐射定标所带来的不确定性分量的来源和意义。最后计算出了在目前器件水平下可达到的辐射定标不确定性数值,从而为实验室辐射定标精度要求提供了理论依据。
Through the complete analysis of a radiometric calibration process,the uncertainty trasfer relationship between absolute calibration and relative calibration is revealed.In the analysis,the multipoint radiometric calibration method is used for the relative calibration and the standard lamp—diffusion board—integrating sphere routine is used for the absolute calibration.By taking this radiometric calibration chain as a model,the uncertainty equations in the radiometric calibration chain are given and the uncertainty factors due to the relative calibration in these equations are analyzed.Finally,the uncertainty values which can be achieved with the current equipment are calculated.These values are helpful theoretically to the determination of the precision requirement for lab radiometric calibration.
出处
《红外》
CAS
2010年第9期23-29,共7页
Infrared
关键词
辐射定标
相对定标
绝对定标
不确定性
radiometric calibration
absolute calibration
relative calibration
uncertainty
