Fig. 1. Structure diagram of coaxial three-mirror optical system

Fig. 2. Initial structure diagram of coaxial three-mirror optical system

Fig. 3. Layout of optical path

Fig. 4. Optical path diagram of TV

Fig. 5. Image quality evaluation of TV optical path

Fig. 6. Field diagram with calibrated distortion and RMS wavefront error

Fig. 7. Optical path diagram of SWIR

Fig. 8. Image quality evaluation of SWIR optical path

Fig. 9. Field diagram with calibrated distortion

Fig. 10. Optical path diagram of MWIR

Fig. 11. Image quality evaluation of MWIR optical path

Fig. 12. Field diagram with calibrated distortion

Fig. 13. Curves of tolerance analysis

Fig. 14. Schematic diagram of assembly and adjustment scheme