Fig. 1. Single-pass system diagram

Fig. 2. Double-pass system diagram

Fig. 3. Test results of single-pass method

Fig. 4. Comparison of ghosting at the edge of the interferogram

Fig. 5. Comparison of diffraction effects under different conditions

Fig. 6. Small-hole equivalent diagram under different conditions

Fig. 7. Imaging deformation diagram in double-pass method

Fig. 8. Imaging deformation diagram in single-pass method

Fig. 9. Internal light path of right angle prism

Fig. 10. Fitting chart of reflectivity and incident angle

Fig. 11. Comparison of interference fringes before and after rotation