Cover architectures in curved eyepiece stacks for mixed reality applications
Eyepieces and methods of fabricating the eyepieces are disclosed. In some embodiments, the eyepiece comprises a curved cover layer and a waveguide layer for propagating light. In some embodiments, the curved cover layer comprises an antireflective feature.
1 . A display system, comprising:
a curved cover layer comprising an antireflective feature;
a second cover layer;
a waveguide layer between the curved cover layer and the second cover layer, wherein the waveguide layer is configured to propagate light therein;
a projector configured to output the light for propagation in the waveguide layer; and
an opening in the curved cover layer or second cover layer, the opening aligned with the projector and configured to optically couple the projector to the waveguide layer.
2 . The display system of claim 1 , wherein the waveguide layer is curved.
3 . The display system of claim 1 , wherein the second cover layer is curved.
4 . The display system of claim 1 , wherein the curved cover layer comprises a second antireflective feature.
5 . The display system of claim 1 , wherein the antireflective feature is created by one or more of casting, using moth-eye film, spin coating, dip coating, and spray coating.
6 . The display system of claim 1 , wherein the curved cover layer is curved in a direction toward the waveguide layer.
7 . The display system of claim 1 , wherein the curved cover layer is curved in a direction away from the waveguide layer.
8 . The display system of claim 1 , wherein a length of the curved cover layer is shorter than a length of the waveguide layer.
9 . The display system of claim 1 , wherein the curved cover layer comprises the opening.
10 . The display system of claim 1 , wherein the projector is disposed at the opening.
11 . A method of fabricating an eyepiece, the method comprising:
providing a waveguide layer having first and second opposing major surfaces, the waveguide layer configured to propagate light received from a projector;
providing a curved cover layer facing the first opposing major surface, the curved cover layer comprising an antireflective feature;
providing a second cover layer facing the second opposing major surface; and
providing an opening in the curved cover layer or second cover layer, the opening aligned with the projector and configured to optically couple the waveguide layer to the projector.
12 . The method of claim 11 , wherein the waveguide layer is curved.
13 . The method of claim 11 , wherein the second cover layer is curved.
14 . The method of claim 11 , wherein the antireflective feature is created by one or more of casting, using moth-eye film, spin coating, dip coating, and spray coating.
15 . The method of claim 11 , wherein the curved cover layer is curved in a direction toward the waveguide layer.
16 . The method of claim 11 , wherein the curved cover layer is curved in a direction away from the waveguide layer.
17 . The method of claim 11 , wherein a length of the curved cover layer is shorter than a length of the waveguide layer.
18 . The method of claim 11 , wherein providing the opening comprises forming a hole in the curved cover layer.
19 . A wearable head device, comprising:
a first eyepiece; and
a projector optically coupled to the first eyepiece, wherein the first eyepiece comprises:
a curved cover layer, the curved cover layer comprising an antireflective feature;
a second cover layer;
a waveguide layer between the curved cover layer and the second cover layer, wherein the waveguide layer is configured to propagate light generated by the projector; and
an opening in the curved cover layer or second cover layer, the opening aligned with the projector and configured to optically couple the projector to the waveguide layer.
20 . The wearable head device of claim 19 , wherein the projector is disposed at the opening.