Study on the accuracy of IR standard radiation source

Tb.ts paper gives a theory formula about tbe accuracy of JR standard radiation source,i. e. blackbody cavity and makes an. experiment. The experiment shows that the greater temperature difference of the b1ack txidy cavity, the worse the accuracy of the blackbody cavity is. The experiment results correspond with the theory formula. So, if the temperature distribution of a blackbody cavity Is measured,the accuracy of a blackbody cavity can be made certain by the theory formula