Dual axis internal optical beam tilt for eyepiece of an HMD

摘要

An eyepiece includes a display module for providing display light, a concave end reflector, and a viewing region including a partially reflective surface to redirect at least a portion of the display light out of an eye-ward side of the eyepiece along an emission path. The partially reflective surface is obliquely angled with an offset from 45 degrees relative to the eye-ward side to cause the emission path to have a first oblique angle in a horizontal dimension relative to a first normal vector of the eye-ward side. 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 top or bottom surface of the eyepiece to cause the emission path to have a second oblique angle in a vertical dimension relative to the first normal vector of the eye-ward side.

主权项

1. An eyepiece, comprising:
a display module for providing display light along a forward propagation path within the eyepiece; a concave end reflector disposed at an opposite end of the eyepiece from the display module to reflect the display light back along a reverse propagation path within the eyepiece; and a viewing region disposed between the display module and the concave 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 with an offset from 45 degrees relative to the eye-ward side to cause the emission path to have a first oblique angle in a horizontal dimension relative to a first normal vector of the eye-ward side, 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 top or bottom surface of the eyepiece to cause the emission path to have a second oblique angle in a vertical dimension relative to the first normal vector of the eye-ward side, wherein the horizontal dimension is orthogonal to the vertical dimension, the vertical dimension intersects through the top and bottom surfaces of the eyepiece, and the horizontal dimension intersects through the display module and the concave end reflector.