Systems, devices, and methods for waveguide-based eyebox expansion in wearable heads-up displays

A wearable heads-up display comprising:

• a support structure that in use is worn on a head of a user;
• an eyeglass lens carried by the support structure and positioned in a field of view of an eye of the user when the support structure is worn on the head of the user;
• a projector to project light, the projector carried by the support structure;
• an optical waveguide carried by the support structure, wherein the optical waveguide comprises:
• an input coupler carried by the optical waveguide and positioned in an optical path of light projected by the projector, the input coupler oriented to couple light from the projector into the optical waveguide;
• a first output coupler carried by the optical waveguide, the first output coupler oriented to couple a first portion of light from the projector out of the optical waveguide and direct the first portion of light to a first exit pupil at or proximate the eye of the user;
• and
• a second output coupler carried by the optical waveguide, the second output coupler oriented to couple a second portion of light from the projector out of the optical waveguide and direct the second portion of light to a second exit pupil at or proximate the eye of the user.