Fig. 1. Optical path of the telescope

Fig. 2. Design results of MTF in all fields of view of the broadband

Fig. 3. Optical path of the advanced Dyson spectrometer

Fig. 4. Design of the advanced Dyson spectral imaging system

Fig. 5. Design results of the advanced Dyson spectral imaging system

Fig. 6. The optical paths of the imaging spectrometer

Fig. 7. Full-system spot diagrams

Fig. 8. Design results of the total system

Fig. 9. Prototype of hyperspectral imager

Fig. 10. Test results of spectral resolution

Fig. 11. Wavelength calibration experiment

Fig. 12. Field observation results