The polarization-difference interference imaging spectrum system with adjustable optical path based on the combination of the angular shear of Wollaston prism and the lateral shear of Savart polariscope,can not only simultaneously obtain the two-dimensional space image and the interference image in the orthogonal polarization direction of the target,but also obtain the interference image in the orthogonal polarization direction under different optical path differences by adjusting the thickness of Savart po...