THE INFLUENCE OF THE TEMPERATURE OF BLACKBODY FOR CALIBRATING FTIR SYSTEM ON THE INSTRUMENT RESPONSE FUNCTION

The instrument response function of Fourier transform infrared spectro meter is a very important parameter in infrared emission spectroscopy to obtain infrared spectral radiance distribution of the desired sampl e, the concentrations of the components of combustion products in the flame etc. This paper gives the effect of the temperature of the stand ard blackbody for calibrating Fourier transform infrared spectrometer on the instrument response function. The result illustrates that the v alues of the instrument response functions decrease as the blackbody t emperature increased, and tends to a limit. The paper points out that the condition must be observed for using instrument response function correctly.