Patent ID: 11953653
Assignee: MAGIC LEAP, INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G  Y | IPC F  G

Claim 24:
25. An anti-reflective waveguide, comprising:
a planar waveguide substrate comprising a layer of glass having a first index of refraction;
a plurality of diffractive optical elements disposed upon a first surface of the waveguide; and
an anti-reflective coating comprising a layer of MgF2 disposed upon a second surface of the waveguide, wherein the waveguide is planar and configured to propagate light by total internal reflection between the plurality of diffractive optical elements and the anti-reflective coating in a substantially first direction, and outcouple light in a second direction substantially orthogonal to the first direction, wherein the light propagating by total internal reflection comprises an s polarization component and a p polarization component, wherein the anti-reflective coating is configured to reduce phase retardation between the two components such that an angle of incidence of the s component is substantially similar to that of the p component through the waveguide for a select color of the light.