Fig. 19
From: Waveguide-based augmented reality displays: perspectives and challenges
(a–d Are redrawn from [1])
Full-color display in multiple diffractive waveguides. a Full-color display with three waveguides. b Full-color display with two waveguides, where green light propagates in both waveguides but with a different FoV, blue and red light is guided in two waveguides separately. The normalized \(k\)-vector diagram of the two-waveguide combiner for c top waveguide and d bottom waveguide. The in-coupler and out-coupler can be a diffractive coupler