Fig. 1. Schematic of several angles in wedge-shaped waveguide system

Fig. 2. Schematic of TIR in wedge-shaped waveguide system

Fig. 3. Relationship between average diffraction efficiency and angle of reference beam

Fig. 4. Relationship between diffraction efficiency and angle at different recording angles

Fig. 5. Preparation system of volume holographic grating

Fig. 6. Relationship between exposure time and diffraction efficiency with different exposure intensities

Fig. 7. Schematic(left)and photo (right) of test setup

Fig. 8. Tested schematic of relationship between angle and diffraction efficiency

Fig. 9. Tested spectral distribution of the VHG

Fig. 10. The reproduced image by the designed VHG