Fig. 1. Working principle of holographic waveguide display system

Fig. 2. Structural diagram of new coupled grating

Fig. 3. Structural diagram of holographic waveguide grating under Bragg condition

Fig. 4. Relationship between tilt angle of VHG and diffraction efficiency

Fig. 5. Relationship between diffraction efficiency and characteristic parameters of VHG. (a) Relationship between modulation degree of refractive index and diffraction efficiency; (b) relationship between thickness and diffraction efficiency

Fig. 6. Structural diagram of blazed grating

Fig. 7. Relationship between blazed grating period and diffraction efficiency

Fig. 8. Relationship among diffraction efficiency,incident wavelength and incident angle. (a) Incident wavelength; (b) incident angle