Eye tracking combiner having multiple perspectives

A display device comprising:

• a waveguide-based display substrate transparent to visible light and configured to be placed in front of a user's eye, the waveguide-based display substrate comprising:
• a first light deflector in a first region of the waveguide-based display substrate, the first light deflector configured to receive a first portion of invisible light reflected by the user's eye and reflect the received first portion of the invisible light to a first direction towards a camera to form a first image of the user's eye in a first area of an image frame;
• and
• a second light deflector in a second region of the waveguide-based display substrate, the second region different from the first region, and the second light deflector configured to receive a second portion of the invisible light reflected by the user's eye and reflect the received second portion of the invisible light to a second direction towards the camera to form a second image of the user's eye in a second area of the image frame.

A method of tracking an eye of a user of a near-eye display system, the method comprising:

• illuminating, by invisible light emitted from one or more light sources, the eye of the user;
• receiving, by a substrate of the near-eye display system positioned in front of the eye of the user, the invisible light reflected by the eye of the user;
• reflecting, by a first light deflector in a first region of the substrate, a first portion of the invisible light reflected by the eye of the user and received by the substrate to a first direction towards a camera to form a first image of the eye of the user in a first area of an image frame, the first image including one or more glints corresponding to the one or more light sources;
• and
• reflecting, by a second light deflector in a second region of the substrate, a second portion of the invisible light reflected by the eye of the user and received by the substrate to a second direction towards the camera to form a second image of the eye of the user in a second area of the image frame, the second image including one or more glints corresponding to the one or more light sources, wherein the second region is different from the first region.