CPC G02B 6/1223 (2013.01) [G02B 6/132 (2013.01); G03F 7/16 (2013.01)] | 18 Claims |
1. An Augmented Reality (AR) optical waveguide comprising:
a transparent substrate including a user proximate surface and a user distal surface; and
a slant etched diffractive grating included on the user distal surface of the transparent substrate, wherein the slant etched diffractive grating includes a refractive index of greater than or equal to 2.0 and has a thickness of less than 200 nanometers (nm), and wherein the slant etched diffractive grating includes zinc peroxide (ZnO2).
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