Polarization volume hologram combiner enabling wide population coverage, eye tracking accuracy, and glint generation

An eye tracking system, comprising:

• one or more illumination sources;
• one or more imaging devices;
• and
• a polarization volume hologram (PVH) combiner that comprises at least one of (i) a first plurality of regions across a surface of the PVH combiner and configured to diffract light from an eye at angles corresponding to different perspectives towards the one or more imaging devices to generate images of the eye from the different perspectives, or (ii) a second plurality of regions that diffract light away from the one or more imaging devices such that the one or more imaging devices generate dark spots in an image of the eye.

An eye tracking system, comprising:

• one or more illumination sources;
• one or more imaging devices;
• and
• a polarization volume hologram (PVH) combiner that comprises a plurality of regions across a surface of the PVH combiner, wherein each region included in the plurality of regions is configured to diffract light from the one or more illumination sources towards an eye of a user to form a glint on the eye, and wherein the PVH combiner is configured to direct light from the eye toward the one or more imaging devices.