Based on the normalemissivity characteristics of measured surface, the mathematical model is simplified, and the formula of temperature measurement using infrared imager is obtained.
基于物体表面法向发射率的特点，简化了热像仪测温的数学模型，得到了红外热像仪测温的计算公式。
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It also shows that the peak value of the emissivity is sometimes far away from the normal direction.