Fig. 1. Performance comparison between SiC ceramic and other mirror materials

Fig. 2. Applications of SiC mirrors in space optical systems. (a) Herschel telescope^[3]; (b) ALADIN telescope^[4]; (c) Gaia telescope^[5]; (d) EO-1^[6]

Fig. 3. Development process of large aperture SiC mirrors in CIOMP^[7]

Fig. 4. Application comparison of ULE lightweight mirrors and SiC mirrors^[8]. (a) Hubble space telescope primary mirror; (b) CSST primary mirror; (c) ultra-lightweight SiC mirror

Fig. 5. RC optical system structure and the relationship between the ratio of tube length to focal length and aberration coefficient. (a) RC optical system structure; (b) RC system tube length to focal length ratio and aberration coefficient curve

Fig. 6. Optical layout of Korsch TMA system^[10]

Fig. 7. Effect of central obscuration on point spread function of optical system

Fig. 8. Designed structures based on off-axis TMA. (a) Off-axis TMA with first image plane; (b) off-axis TMA without first image plane

Fig. 9. Optical structure of high resolution camera for Mars exploration in China and comparison with similar foreign cameras

Fig. 10. Optical structure of Chinese space station telescope

Fig. 11. Optical structure of GF-6 camera

Fig. 12. Development trend of normalized frequency of space optical system

Fig. 13. Sampling of optical system

Fig. 14. Large aspheric mirror manufacturing equipment of Institute of Optics and Electronics, Chinese Academy of Sciences^[19]

Fig. 15. KDMRF polishing machine developed by National University of Defense Technology^[20]

Fig. 16. CIOMP 4 m large-aperture complex curved surface full-link integrated manufacturing system^[7]. (a) Mirror blank preparation system; (b) aspheric processing system; (c) aspheric measurement system; (d) aspheric coating system

Fig. 17. Traditional technical process route based on small tool polishing

Fig. 18. Combined process route based on CCOS + MRF + IBF

Fig. 19. Processing results of 1.5 m off-axis parabolic mirror^[21]

Fig. 20. Processing time of each process of 1.5 m off-axis parabolic mirror^[21]

Fig. 21. Comparison of imaging results before and after COSTAR installation of Hubble space telescope^[24]

Fig. 22. Sub-aperture planning and measurement results using sub-aperture stitching method^[25]

Fig. 23. Residual distribution of the comparison between two methods^[25]. (a) Full aperture measurement results after splicing; (b) refractive compensator measurement results; (c) residuals of the two measurement results

Fig. 24. Measurement results of refractive compensator^[26]. (a) Measurement results of refractive compensator; (b) measurement results of computer-generated holography

Fig. 25. Common reference alignment scheme for primary and tertiary mirrors of off-axis three-mirror system by CGH^[27]

Fig. 26. Scene photo and interferograms of primary and tertiary mirrors common reference assembly^[27]

Fig. 27. Principle of interference test and distribution of diffraction area^[28]

Fig. 28. Surface measurement results of the second and fourth mirrors^[28]

Fig. 29. Consistency verification results of optical facility primary mirror

Fig. 30. Mechanical arm optical processing equipment of CIOMP^[29]. (a)(b) Mechanical arm CCOS equipment; (c)(d) mechanical arm MRF polishing equipment