Fig. 1. Apples under visible and near-infrared observation

Fig. 2. FS-3200T-10GE-NNC multispectral camera

Fig. 3. Spectral response diagram of multispectral camera

Fig. 4. Schematic diagram of machine vision system

Fig. 5. Optical model of machine vision

Fig. 6. 2D structure diagram of multispectral machine vision lens

Fig. 7. MTF diagrams of system at 500 mm working distance

Fig. 8. MTF diagrams of system at 1 000 mm working distance

Fig. 9. MTF diagrams of system at 1 500 mm working distance

Fig. 10. Distortion diagrams under different bands and working distances

Fig. 11. Telecentricity under different bands and working distances

Fig. 12. Longitudinal aberration under different bands and working distances

Fig. 13. Monte Carlo analysis of system at 145 lp/mm