Fig. 1. Schematic diagram of waveguide augmented reality head-up display (AR-HUD) principle

Fig. 2. Side view of waveguide physical structure

Fig. 3. Schematic diagram of beam propagation. (a) Schematic diagram of stray light; (b) schematic diagram of gap between expanded beams

Fig. 4. Reflectivity of microprism array area. (a) Not optimized; (b) optimized

Fig. 5. Waveguide AR-HUD system. (a) Schematic diagram of overall system structure; (b) schematic diagram of collimating eyepiece structure; (c) modulation transfer function (MTF) curve

Fig. 6. Schematic diagram of illuminance distributions for different sampling fields. (a) (-5°, 0°); (b) (-3.75°, 0°); (c) (-2.5°, 0°); (d) (-1.25°, 0°); (e) (0°, 0°); (f) (1.25°, 0°); (g) (2.5°, 0°); (h) (3.75°, 0°); (i) (5°, 0°) (area inside frame corresponds to microprism array area 2 reflecting waveguide beam illuminance distribution map); (j) stray light 2 illuminance distribution diagram; (k) beam propagation path diagram in areas with uneven illuminance distribution

Fig. 7. Full-color display. (a) RGB three-color original image; (b) imaging result

Table 1. Design parameters of collimating eyepiece

Table 2. Illumination uniformity of different sampling fields