Fig. 1. Diagram of light path of inverted 3-FOV Schmidt telescope

Fig. 2. Mathematical model extraction of 3-facet mirror

Fig. 3. Model decomposition

Fig. 4. Finite element analysis software modeling

Fig. 5. Support radius modeling

Fig. 6. Support radius selection

Fig. 7. PSF in X direction

Fig. 8. Schematic diagram of detecting optical path of Schmidt corrector

Fig. 9. Stray light model

Fig. 10. PST curve of optical system

Fig. 11. Irradiation diagrams of image plane at different off-axis angles

Fig. 12. 3-facet mirror and test results of each surface

Fig. 13. Optical system experiment