论文部分内容阅读
1.发射率发射率ε是波长λ和温度 T 的函数。在某一波长和温度下物体的光谱辐射亮度L_(λ.T)可用下式表示:L_(λ.T)=ε(λ,T)·L(λ.T)这里,L_((λ.T))是完全辐射体的光谱辐射亮度,ε(λ·T)是该物体的光谱发射率。实际使用时,用有效波长代表波长,把发射率看作是温度的函数,然而最基本而重要的还是光谱发射率。不仅以各种金属为中心不断地进行了光谱发射率的测定和理论的探讨,而且最近还扩展到了金属氧化物和非金属材料的对象中。(1)金属的发射率
1. Emissivity Emissivity ε is a function of wavelength λ and temperature T. The spectral radiance L_ (λ.T) of an object at a certain wavelength and temperature can be expressed by the following equation: L_ (λ.T) = ε (λ, T) · L (λ.T) Here, L_ (λ. T)) is the spectral radiance of the complete radiator, and ε (λ · T) is the spectral emissivity of the object. In actual use, the wavelength is represented by the effective wavelength and the emissivity is taken as a function of temperature, but the most fundamental and important is the spectral emissivity. The measurement and theoretical discussion of spectral emissivity have been continuously conducted not only on a variety of metals but have also recently been extended to objects of metal oxide and non-metal materials. (1) metal emissivity