基于8～14μm带宽的谱带发射率的研究  

A Primary Study of 8～14 μm Band Emittance

作　　者：于坤[1,2,3] 刘玉芳[1,2] 贾光瑞[1] 施德恒[2] 

机构地区：[1]北京理工大学光电学院,北京100081 [2]河南师范大学物理与信息工程学院,河南新乡453007 [3]兴义民族师范学院物理系,贵州兴义562400

出　　处：《光谱学与光谱分析》2012年第2期289-292,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(60977063);贵州省教育厅自然科学基金重点项目(2010089)资助

摘　　要：针对红外测量中常用的8～14μm的带宽,依据前人的实验结果,计算了两种材料的谱带发射率,并且通过简单的实验,测量了几种材料的谱带发射率。实验和计算结果表明:谱带发射率与温度之间存在着某种函数关系。对于常用的带通辐射测温仪和热像仪,如果测量对象为非灰体,仍然把发射率值看作是一个常数,将会导致较大的测量误差。初步研究表明,对于非金属和真空中的金属,谱带发射率与温度近似存在线性关系。利用拟合出的谱带发射率与温度的函数关系式,可以作为辐射测温仪和热像仪的修正,不仅简化了计算,而且能够提高其测量精度。According to the previous experimental results,the band emittance of two materials were computed for 8～14 mm bandwidth in infrared measuring.The band emittance of several materials was surveyed by a simple experiment.The experiment and reckoning show that there is some kind of functional relation between band emittance and temperature.If the object measured is non-gray,and emissivity is regarded as a constant,acute measurement error will be generated for band pass radiation thermometer and thermal imaging system.The band emittance is nearly linear with the temperature for nonmetal and metal in vacuum by primary analysis.The fitted function equation can be used as the modification of band pass radiation thermometer and thermal imaging system,and the band emittance not only simplifies the calculation,but also improves the accuracy of measurement.

关 键 词：光谱发射率 谱带发射率 辐射测温计 多项式拟合 

分 类 号：O433.1[机械工程—光学工程]