Fig. 1. Grating waveguide system light path diagram

Fig. 2. Beam propagation diagram

Fig. 3. Raytracing of grating waveguide system

Fig. 4. Diagram of grating waveguide. (a) Parallel waveguide; (b) tilted waveguide

Fig. 5. Relationship between waveguide substrate irregularity and light deflection angle. (a) Waveguide X-axis tilt; (b) waveguide Y-axis tilt

Fig. 6. Simulation diagrams of grating waveguide parallelism imaging. (a) 6' tilt in Y-axis direction; (b) 6' tilt in X-axis direction

Fig. 7. Diagram of grating period error. (a) Waveguide period is the same; (b) local period of the waveguide is different

Fig. 8. Diagram of relationship between grating period deviation and angle deflection of outgoing light

Fig. 9. Simulation diagrams. (a) Simulation diagram of normal grating period; (b) simulation diagram of grating with 4 nm error generated by local period

Fig. 10. Diagrams. (a) Diagram of defocused beam propagation of mirror group; (b) diagram of observed duplicate image after defocusing

Fig. 11. Simulation diagrams. (a) Simulation diagram of beam collimation propagation imaging; (b) simulation diagram of 1 mm defocus imaging

Fig. 12. Schematic diagram of micro display tilt

Fig. 13. Simulation diagrams. (a) Simulation diagram of beam collimation propagation imaging; (b) simulation diagram of micro image source tilting 5°

Fig. 14. Simulation diagram of analog imaging with three errors at the same time

Fig. 15. Grating waveguide processing technology

Fig. 16. Diffractive waveguide grating

Fig. 17. Grating waveguide imaging. (a) Image test device; (b) test figure

Fig. 18. Grating waveguide imaging test chart. (a) Ghosting caused by local grating periodic change; (b) ghosting caused by grating waveguide tilt; (c) imaging blur and ghosting caused by assembly error

Fig. 19. Exit pupil expansion light test chart

Fig. 20. Test chart of good imaging quality

Fig. 21. Schematic diagram of field angle measurement