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 . An eyepiece, comprising:
a curved cover layer, wherein the curved cover layer comprises an antireflective feature;
a waveguide layer configured to propagate light generated by a projector;
an opening configured to optically couple the projector to the waveguide layer; and
a second cover layer.
2 . The eyepiece of claim 1 , wherein the waveguide layer is curved.
3 . The eyepiece of claim 1 , wherein the second cover layer is curved.
4 . The eyepiece of claim 1 , wherein the curved cover layer comprises a second antireflective feature.
5 . The eyepiece 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 eyepiece of claim 1 , wherein the cover layer is curved in a direction toward the waveguide layer.
7 . The eyepiece of claim 1 , wherein the cover layer is curved in a direction away from the waveguide layer.
8 . The eyepiece of claim 1 , wherein a length of the curved cover layer is shorter than a length of the waveguide layer.
9 . The eyepiece of claim 1 , wherein the curved cover layer comprises the opening.
10 . A method of fabricating an eyepiece, the method comprising:
providing a waveguide layer configured to propagate light received from a projector;
providing a curved cover layer comprising an antireflective feature;
providing a second cover layer; and
providing an opening configured to optically couple the waveguide layer to the projector.
11 . The method of claim 10 , wherein the waveguide layer is curved.
12 . The method of claim 10 , wherein the second cover layer is curved.
13 . The method of claim 10 , wherein the antireflective feature is created by one or more of casting, using moth-eye film, spin coating, dip coating, and spray coating.
14 . The method of claim 10 , wherein the cover layer is curved in a direction toward the waveguide layer.
15 . The method of claim 10 , wherein the cover layer is curved in a direction away from the waveguide layer.
16 . The method of claim 10 , wherein a length of the curved cover layer is shorter than a length of the waveguide layer.
17 . The method of claim 10 , wherein providing the opening comprises forming a hole in the curved cover layer.
18 . 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 waveguide layer configured to propagating light generated by a projector;
an opening configured to optically couple the projector to the waveguide layer; and
a second cover layer.