ATolerance analysis of wedge angle in Wollaston prism array

The performance of polarization interference Fourier transform spectrometer is dependent on the angle error of each prism in Wollaston prism array(WPA). Based on the seamless stitching of interferograms, the maximum optical path difference of 1n WPA was deduced. Taking a 13 WPA as example, the impact of the angle error of each prism on spectral resolution was analyzed. The interferogram model was constructed based on fringe pattern intensity formula. The spectrum of 630nm monochromatic light was simulated with MATLAB program and the impact of angle error on spectrum was analyzed. A false spectral peak occurred when the angle error was larger than the magnitude of 10-3.