接近灰体的短波辐射源色温修正为真温的近似法

AN APPROXIMATE MODIFICATION METHOD FOR REAL TEMPERATURE FROM COLOR TEMPERATURE OF A SHORT-WAVE RADIATION SOURCE APPROXIMATE TO GRAY BODY

通过引进参量β１和β２，并测出维恩公式适用的波长λ１和λ２与某一特定波长λ０及相应的亮温Ｔ１ｓ，Ｔ２ｓ和Ｔ０ｓ，将接近灰体的短波辐射源色温修正为真温．其修正的相对误差比直接由比辐射率测定的相对误差小倍．

By defining two parameters β1,β2,and by measuring wavelengths λ1,λ2 and a certain wavelength Ac as well as the corresponding brightness temperatures T1s,T2s and TOs,which are suited to the Wied's formula, an approximate method is presented for real temperature modified from the color temperature of a short-wave radiation source which is approximate to a gray body. The relative error of modification in the method is decreased by a factor of λ/2λ as compared with that based on the emissivity measurement.