Fig. 1. Schematic diagram of diffraction imaging spectrometer system

Fig. 2. Theory PSF (520-800 nm, 15 wavebands)

Fig. 3. Each mixed diffractive image in corresponding focal plane

Fig. 4. Each demodulation spectral image

Fig. 5. Demodulation error of 740 nm

Fig. 6. Experimental prototype of the double channels system

Fig. 7. Imaging targets (scene one and scene two)

Fig. 8. [in Chinese]

Fig. 8. Imaging effect of three diffraction channels and one grayscale channel

Fig. 9. Reconstructed spectral data of scene one

Fig. 10. Reconstructed spectral data of scene two

Fig. 11. [in Chinese]

Fig. 11. Reconstructed spectral data curve and accuracy (Black curve: the target spectral curve measured by ocean optics spectrometer；Red curve: the target spectral curve recovered by the experimental system)