Fig. 15

Analysis of FoV limit in diffractive and geometric waveguide combiners. a Eyebox discontinuity in waveguide display. The \(k\)-vector diagram in the \({k}_{z}\)–\({k}_{x}\) plane b before diffraction or reflection, c after diffraction in diffractive waveguide combiner or d after reflection in geometric waveguide combiner. e Relationship between diagonal FoV limit and waveguide refractive index at single wavelength for butterfly design at aspect ratio 16:9 and traditional 2D EPE design at aspect ratio 1:1, respectively. The maximum TIR angle in these two designs is \(75^\circ\)