The Interferogram Processing And Its Application About Spectral Rebuilding

This paper describes interference spectrum technology in system development background, status and application based on the analysis of the interference spectrum of the basic principles and basic equations. Of interferogram data processing method, which interferogram data preprocessing, interferogram apodization, phase correction, Fourier transform, and transfer of multivariate phase model.In fact, the interferogram apodization which the main purpose suppresses the sidelobes, retains the main lobes, the main method is chooses an interruption function (referred to as apodization function) to carry on the interruption to the interference spectrum signal. This article on the basis of in discussing various apodized function expressions and characteristics of various properties of apodized function, established the corresponding test run to carry on processing and the analysis to the simulation interferogram, and finally obtained the use improvement Happ-Genzel and the Norton-Beer function to simulate the interferogram to apodizate effect to be good.Phase correction mainly interferogram phase error problems, so that you can collect the data with less (unilateral acquisition) access to high quality spectrum. This article based on Eigen filter of the improved phase correction method of all pass filter design phase correction method, and two classic (Forman and Mertz law), compared to the three-point method, through the analysis of experimental results, be that for the analysis of spectral range, accuracy and resolution, asked for a better effect of correction, will minimize the impact of phase error.Because of the test sample possibly has virulent harmful, unstable, the price to be expensive and quantity few and so on questions, caused and rebuild the Rescan sample exclusive model is very uneconomical for the calibration of the instrument is not viable. Text in the discussion has multiple correction model transfer problem of principle and some commonly used algorithmare are suitable for this question, by on model passed of actual application for experimental design, research and established a before and after balance of integration spectrum reconstruction solution method, Namely between in the spectrogram and the input interferogram must obtain establishes the connection model, through serves the processing effect most superior purpose to the model whole optimization, and will consummate the model transmission theory and the algorithm for the later deep research provides the help.