Fig. 1. Diffraction principle of transmission grating

Fig. 2. Schematic diagram of single transmission grating spectroscopic model

Fig. 3. MTF curves and spot diagram of focusing system

Fig. 4. Optical structure diagram

Fig. 5. Optical splitting system of grating imaging spectrometer

Fig. 6. Spot diagram at different bands of grating imaging spectrometer

Fig. 7. MTF curves at different bands of grating imaging spectrometer

Fig. 8. Spectroscopic results of imaging spectrometer at wavelength interval of 2 nm

Fig. 9. Diagram of line bending and color distortion

Fig. 10. Spectral line bending and color distortion of spectrometer

Fig. 11. Spectral calibration device and its calibration results

Fig. 12. Push-scan imaging test diagram

Fig. 13. Mosaic diagram of wheat seed spectral image

Fig. 14. Wheat seed spectral image cube, spectral curve contrast and false color synthesis image