Analysis of Tracking Error in Infrared Recording Spectrophotometry
Shigeo Minami, Shigeru TSUTSUI · Journal of the Spectroscopical Society of Japan · 1968
The tracking error caused by the dynamic characteristics of recording spectrophotometers is discussed and analyzed.Under the limited signal-to-noise ratio and available measuring time, the distortion of bands in the recorded spectrum due to the insufficiency of the response of the recording system introduces an appreciable error.The analysis is carried out by computing the distortions for Gaussian and Lorentzian bands by means of an analog simulator after having derived the transfer functions of the recording spectrophotometers.Prior to demonstrating the process of this procedure, the detailed steps in simplifying the block diagrams of the systems are illustrated.The analysis of the tracking errors is carefully done taking into consideration that the signal-to-noise ratio is dominated by the detector noise.The computed values of the tracking errors are in good agreement with the experimental ones obtained with commercial instruments. This procedure of the analysis might be helpful not only to the determination of the parameters in instrument designing but to find the optimum condition of the measuring programs in the recording spectrophotometry.