CPC G02B 27/0172 (2013.01) [G02B 6/0208 (2013.01); G02B 2027/0123 (2013.01); G02B 2027/0174 (2013.01)] | 20 Claims |
1. A waveguide display comprising a plurality of grating layers, the plurality of grating layers characterized by two or more different base refractive indices and including a set of volume Bragg gratings (VBGs) formed in the plurality of grating layers, wherein:
each VBG of the set of VBGs is configured to diffract display light in a different respective field-of-view (FOV) and wavelength range;
the set of VBGs includes a plurality of groups of VBGs; and
VBGs in each respective group of the plurality of groups of VBGs are characterized by a same grating period and include at least one VBG in each grating layer of the plurality of grating layers, wherein VBGs in a first group and a second group of the plurality of groups of VBGs are characterized by different grating periods.
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