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把落到目标上的总的环境辐射等效成一个温度为T_0的黑体辐射,研究了环境辐射改变时对热成象系统灵敏度方程的影响,从而从理论上证明了用改变环境辐射的办法可以测定目标的比辐射率。给出了用红外测温仪测定环境等效黑体温度T_0的方法和实验结果。给出了用红外测温仪测定目标比辐射率的一种新方法及实验结果。对于环境辐射不能忽略时如何用比辐射计测定目标的真实温度作了方法性和原理性的讨论。对于如何用测温仪测定地物对太阳的光谱反射率也作了方法性和原理性的讨论。
The total environmental radiation falling on the target is equivalent to a blackbody radiation of temperature T_0. The influence of environmental radiation on the sensitivity equation of the thermal imaging system is studied, and it is theoretically proved that the method of changing the environmental radiation can Determination of the target emissivity. The method and experiment result of measuring the environment equivalent blackbody temperature T_0 with infrared thermometer are given. A new method and experiment result of measuring target specific emissivity with infrared thermometer are given. How to determine the true temperature of the target with a radiometer can not be ignored for the environmental radiation methodological and theoretical discussion. There is also a discussion of the methodology and rationale for how to measure the spectral reflectance of the solar radiation by thermometers.