Fig. 1. Structure diagram of diffractive waveguide HMD

Fig. 2. Schematic diagram of collimating projection lens

Fig. 3. Optical path diagram of collimating projection lens

Fig. 4. Optical path diagram of actual luminous point P₁ and virtual luminous point P₂

Fig. 5. Simulation diagram of luminous intensity

Fig. 6. Angles corresponding to the maximum luminous intensity at different field lens focal lengths and distance between field lens and optical system

Fig. 7. Layout of collimating projection lens and waveguide

Fig. 8. Schematic diagram of field lens (T is tangent line, and N is normal line)

Fig. 9. Derivative function curve of field lens surface

Fig. 10. Aspheric curve of field lens

Fig. 11. Structure diagram of collimating projection lens with field lens

Fig. 12. MTF curves of collimating lens with field lens

Fig. 13. Spot diagrams of collimating lens with field lens

Fig. 14. Diagram of diffractive waveguide system

Fig. 15. Simulation results diagram