“…In recent years, augmented reality (AR) has received a lot of interest due to its ability to fuse virtual information with real situations. 1,2 Currently, according to the type of coupling elements, AR technologies are divided into the solutions of the split-beam prism, 3 free-form surface, 4 retinal projection, 5 and optical waveguide. 6 Compared to the other solutions, the optical waveguide is considered to be the most promising solution for AR because of its lightweight, small size, expandable pupil, large field of view (FOV), and appearance closer to eyeglasses.…”