Patent ID: 9733477
Date: 2017-08-15
CPC Classifications: G02B

Claim:
1. An eyepiece, comprising: a first end for receiving display light along a forward propagation path within the eyepiece; an end reflector to reflect the display light from the forward propagation path to a reverse propagation path within the eyepiece; and a viewing region disposed between the first end and the end reflector and including a partially reflective surface, the partially reflective surface to redirect at least a portion of the display light traveling along the reverse propagation path out of an eye-ward side of the eyepiece along an emission path, wherein the partially reflective surface is obliquely angled relative to the eye-ward side to cause the emission path to have a first oblique angle relative to a first normal vector of the eye-ward side, wherein the first oblique angle between the emission path and the first normal vector resides in a first plane, wherein the end reflector is tilted to cause the emission path to have a second oblique angle relative to the first normal vector of the eye-ward side, wherein the second oblique angle between the emission path and the first normal vector resides in a second plane, wherein the first and second planes are orthogonal to each other, wherein the end reflector comprises a concave end reflector and wherein the concave end reflector is tilted such that a second normal vector from a center point of the concave end reflector is obliquely angled relative to a first or second side surface of the eyepiece, wherein the first and second side surfaces are not the eye-ward side, an external scene side opposite the eye-ward side, or the first end of the eyepiece.