Abstract: Examples are disclosed that relate to expanding an exit pupil of a display device via a curved waveguide. One example provides a curved waveguide, including an input coupler configured to couple light into the curved waveguide, a first reflective surface, a second reflective surface opposing the first reflective surface, and an output coupler configured to couple the light out of the curved waveguide. The curved waveguide also has a curvature in a direction transverse to an optical path between the input coupler and the output coupler, the curvature having a radius that varies along a direction extending between the input coupler and the output coupler.
Type:
Grant
Filed:
November 27, 2018
Date of Patent:
March 30, 2021
Assignee:
Microsoft Technology Licensing, LLC
Inventors:
Tuomas Heikki Sakari Vallius, Richard Andrew Wall