Fig. 1. Prism dispersion diagram

Fig. 2. Diagram of different incident angles versus dispersion of prism

Fig. 3. 600 line/mm dispersion of prism at different incident angles

Fig. 4. Schematic diagram of dispersion for combination of prism and grating

Fig. 5. PG spectroscopic system design flow chart

Fig. 6. Spectral dispersion ability of different linear gratings corresponding to different grating incident angles

Fig. 7. Imaging system

Fig. 8. Spot diagram

Fig. 9. Resolution simulation verification results. (a) Spectral distribution of 400 nm and 402 nm; (b) spectral distribution of 700 nm and 702.5 nm; (c) spectral distribution of 1000 nm and 1002 nm

Fig. 10. Comparison of spectral dispersion distribution. (a) In Ref. [9]; (b) in Ref. [29]; (c) ours

Fig. 11. Experimental test environment

Fig. 12. Experiment results of sresolution. (a) Near 420 nm; (b) near 600 nm; (c) near 780 nm

Fig. 13. Experiment results of spectral distribution