Head mounted display with eye tracking
Assignee3M Innovative Properties Company
InventorAndrew J. Ouderkirk
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Abstract
A head mounted display is disclosed. More particularly, a head mounted display including one or more projection light sources, one or more eye-tracking light sources, a polarizing beam splitter, and a second polarizing beam splitter is disclosed. Light from the one or more projection light sources and the one or more projection light sources and the one or more eye-tracking light sources are both at least partially reflected by the polarizing beam splitter. An optical path between the polarizing beam splitter and the second polarizing beam splitter passes through air. A head mounted display that utilizes polarizing beam splitters having certain reflection bandedges over a range of incidence angles is disclosed.
Claims10
A head-mounted optical device comprising:
- an eye-tracking light source configured to emit an eye-tracking light;
- a first polarizing beam splitter;
- and
- a second polarizing beam splitter,
- wherein the first polarizing beam splitter reflects at least 50% of the eye-tracking light having a first polarization state and less than 50% of the eye-tracking light having an orthogonal second polarization state, and
- wherein the second polarizing beam splitter transmits at least 50% of the eye-tracking light for each of the first and second polarization states.
Dependencies are inferred from the claim text.