Fig. 18
From: Waveguide-based augmented reality displays: perspectives and challenges
(a, c Are redrawn from [126] and d, e are redrawn from [127])
Schematics of spectral spread in diffractive waveguide combiner. a Spectral spread in single diffractive waveguide scheme. b Boundary condition of FoV for full-color display in this scheme. c Relationship between FoV limit in pupil expansion direction and refractive index \({n}_{g}\) under different maximum TIR angles for this scheme. d Top-down 1D EPE scheme and e right–left 1D EPE scheme under 16:9 aspect ratio