Fig. 1. Schematic diagram of single-layer Wolter-Ⅰ focusing mirror

Fig. 2. X-ray reflectance curve with different energy

Fig. 3. Light path diagram of point light source calibration simulation model

Fig. 4. Light path diagram of parallel light source calibration simulation model

Fig. 5. Effective area simulation light path diagram

Fig. 6. Effective area of each lens layer under two models

Fig. 7. Off-axis simulation imaging

Fig. 8. Variation of effective area with off-axis angle by simulation

Fig. 9. Vacuum tank interior

Fig. 10. Visible light alignment

Fig. 11. Defocused spot

Fig. 12. Experimental calibration results

Fig. 13. Off-axis experimental imaging results

Fig. 14. Variation of effective area with off-axis angle by experiment