Fig. 1. Structural diagram of PVG

Fig. 2. Realization method of transverse period. (a) Interference of RCP and LCP; (b) relationship between transverse period and angle of interference light; (c) polarization state distribution of interference light field

Fig. 3. Diffraction characteristics of reflective PVG

Fig. 4. Structural diagrams of waveguide display system. (a) Without pupil expansion; (b) pupil expansion in one-dimensional direction

Fig. 5. Light path of circular polarization holographic interference exposure

Fig. 6. Fabrication flow chart of PVG

Fig. 7. Photo of fabricated PVG

Fig. 8. Diffraction efficiency diagram for PVG at normal incidence

Fig. 9. Process of double-holography exposure

Fig. 10. Structural diagram of waveguide display system with pupil expansion in two-dimensional direction

Fig. 11. Distribution diagram of grating vectors

Fig. 12. Copied light beam in one-dimensional and two-dimensional directions

Fig. 13. Waveguide display system

Fig. 14. Display effect of different images with pupil expansion in one-dimensional direction

Fig. 15. Display effect of different images with pupil expansion in two-dimensional direction

Fig. 16. Exit pupil range of display system