Fig. 1. Schematic diagram of resolution test system for portable low-level-light night-vision viewer

Fig. 2. Three-dimensional light intensity distribution in geometric coordinates of LED

Fig. 3. Schematic diagram of LED

Fig. 4. Structure diagram of iris diaphragm

Fig. 5. Schematic diagram of resolution target

Fig. 6. Cutaway diagram of resolution target switching module

Fig. 7. Design diagram of imaging objective lens

Fig. 8. Schematic diagram of illuminometer

Fig. 9. Spectral response curve and visual function curve