Influence of polarized direction on modulation depth of a polarization interference imaging spectrometer

The principle of a novel polarization interference imaging spectrometer (PIIS) is described and the shearing and imaging principle of the PIIS is analyzed. Influence of polarized direction of polarizer and analyzer on modulation depth of spatially distributed interferogram was analyzed and calculated. The dependence of modulation depth on deviation was calculated with polarized direction deviated from the ideal direction, Spatial curved surface of the modulation depth variation with deviation and spatial orientation of polarizer's polarization direction in the case of the maximum modulation depth (V=1) or minimum modulation depth (V=0) are given and discussed.