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Varifocal head-mounted display including modular air spaced optical assembly

  • US 10,416,766 B1
  • Filed: 04/19/2019
  • Issued: 09/17/2019
  • Est. Priority Date: 01/17/2017
  • Status: Active Grant
First Claim
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1. An eye tracker comprising:

  • an illumination source located between a first optical element and a second optical element which share an optical axis, the eye tracker configured to;

    output light generated by the illumination source, anddetermine a gaze direction for an eye relative to the optical axis based at least in part on a modified version of the output light,the output light being modified by an optical power of the first optical element prior to reflection from the eye.

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