Relationship between incident angle and dispersion in static large field of view polarization interference imaging spectrometer

The static large field of the view polarization interferenceimaging spectrometer is based on the modified Savart polariscope.There appears a dispersion between the ordinary ray and extraordinaryray when light passes through the modified Savart polariscope. Thedispersion greatly influences the intensities and the results of theinterferogram and target image in the static large field of the viewpolarization interference imaging spectrometer. At the same time,the incident angle determines the dispersion. When the light goesthrough the modified Savart polariscope, the dispersion occurs inthe left plate, the half-wave plate and the right plate of themodified Savart polariscope. Using the extension of Snell's law, thedispersion in the crystal is theoretically calculated andnumerically simulated separately. The relationship curve betweenincident angle and the dispersion is obtained by simulation.