Fig. 1. Schematic view of the PS/PDI.

Fig. 2. Cr film transmittance versus thickness.

Fig. 3. Single-slit diffraction.

Fig. 4. Structure of the rectangular linear grating.

Fig. 5. (Color online) Curve of the grating diffraction efficiency.

Fig. 6. Curve of the pinhole transmittance.

Fig. 7. Curve of the interference fringe contrast.

Fig. 8. PS/PDI structure of the homemade grating and interferograms. (a) A grabbed interferogram, (b) an interferogram of the removed background, (c) the homemade grating adopts the design method in this Letter, (d) an enlarged view of (b), and (e) a Zernike coefficient diagram of the measurement results.