Fig. 1. System structure diagram

Fig. 2. Schematic diagram of spectral imaging system

Fig. 3. Light diagram of grating surface

Fig. 4. Design results of telescope system. (a) Two-dimensional graph; (b) three-dimensional graph

Fig. 5. MTF curves of telescope system

Fig. 6. RMS of telescope system

Fig. 7. Design results of auto-collimation system. (a) Two-dimensional graph; (b) three-dimensional graph

Fig. 8. MTF curves of auto-collimation system at different wavelenghs. (a) 1610 nm; (b) 1625 nm; (c) 1640 nm

Fig. 9. RMS of auto-collimation system at different wavelenghs. (a) 1610 nm; (b) 1625 nm; (c) 1640 nm

Fig. 10. Design results of imaging spectrometer. (a) Two-dimensional graph; (b) three-dimensional graph

Fig. 11. MTF curves of imaging spectrometer at different wavelenghs. (a) 1610 nm; (b) 1625 nm; (c) 1640 nm

Fig. 12. RMS of imaging spectrometer at different wavelenghs. (a) 1610 nm; (b) 1625 nm; (c) 1640 nm

Fig. 13. MTF tolerance analysis of imager spectrometer. (a) Tangential plane; (b) sagittal plane