Correction of Temperature Effect on Dispersive Raman Spectrometer Based on Convolution with Gaussian Function
Dispersive Raman spectrometer is sensitive to the temperature of environment,which affects the consistency of measured spectra.To solve the problem,a method was proposd for correcting the temperature effect on instruments by applying convolution with a Gaussian function.A standard material was used to represent the instrumental response functions under various temperature conditions,then a Gaussian function for convolution was built,the problems of wave number drift and resolution variation were corrected.Based on spectral analysis and curve fitting,this method does not need to measure a set of well-prepared samples.Benzene was used as standard material in the experiment,and the temperature correction was performed on Raman spectra of m-xylene and a gasoline sample.Results show that it is an effective method to reduce temperature influence on dispersive Raman spectrometer,and the consistency of Raman spectra measured at different temperatures was greatly improved after correction.