Fig. 1. Schematic of holographic waveguide plate optical path transmission. (a) Reflection coupling elements; (b) transmission coupling elements

Fig. 2. Schematic of recording and reproduction of transmissive coupling element. (a) Schematic of coupling element 1 recording; (b) schematic of coupling element 2 recording; (c) schematic of coupling element 1 reproduction; (d) schematic of coupling element 2 reproduction

Fig. 3. Grating vector analysis diagram of projective coupling elements. (a) K vector circle analysis diagram of coupling element 1; (b) schematic of grating inclination of coupling element 1; (c) K vector circle analysis diagram of coupling element 2; (d) schematic of grating inclination of coupling element 2

Fig. 4. Grating vector analysis diagram of projective coupling elements. (a) K vector circle analysis diagram of coupling element 1; (b) schematic of the grating inclination of the coupling element 1; (c) K vector circle analysis diagram of coupling element 2; (d) schematic of the grating inclination of the coupling element 2

Fig. 5. Schematic of coupling element recording optical path. (a) Transmissive coupling element 1; (b) transmissive coupling element 2; (c) reflective coupling element 1; (d) reflective coupling element 2

Fig. 6. Interference light intensity simulation result of coupling element during recording. (a) Transmissive coupling element 1; (b) transmissive coupling element 2; (c) reflective coupling element 1; (d) reflective coupling element 2

Fig. 7. Simulation results of cross-sectional electric field distribution when the coupling element is reproduced. (a) Transmissive coupling element 1; (b) transmissive coupling element 2; (c) reflective coupling element 1; (d) reflective coupling element 2

Fig. 8. Influence of wavelength shift on grating constant and first-order diffraction angle. (a) Grating constant; (b) first-order diffraction angle