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US 11,108,977 B1Granted
Dual wavelength eye imaging
AssigneeFacebook Technologies, LLC
InventorsRobin Sharma, Andrew John Ouderkirk, Qi Zhang, Christopher Yuan-Ting Liao, Karol Constantine Hatzilias
Life of this patent
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Abstract
An eye is illuminated with a first non-visible light wavelength and a second non-visible light wavelength. A first ocular image is captured from first reflected light having the first non-visible light wavelength and a second ocular image is captured from second reflected light having the second non-visible light wavelength.
Claims20
A near-eye imaging system comprising:
- first illuminators configured to emit first near-infrared light toward an eye region;
- second illuminators configured to emit second near-infrared light to the eye region, the second near-infrared light being a different wavelength than the first near-infrared light;
- a camera module;
- and
- a near-eye optical element comprising:
- a first combiner layer configured to pass visible scene-light to the eye region and direct the first near-infrared light reflecting from the eye region to the camera module;
- and
- a second combiner layer configured to pass the visible scene-light to the eye region and direct the second near-infrared light reflecting from the eye region to the camera module.
5 more elements
A near-eye optical element comprising:
- first illuminators configured to emit first light having a first non-visible wavelength toward an eye region;
- second illuminators configured to emit second light having a second non-visible wavelength to the eye region, the first non-visible wavelength being different from the second non-visible wavelength;
- a first combiner layer configured to pass visible scene-light to the eye region and direct the first light reflecting from the eye region to a camera module;
- and
- a second combiner layer configured to pass the visible scene-light to the eye region and direct the second light reflecting from the eye region to the camera module.
2 more elements
A method of near-eye stereo imaging, the method comprising:
- illuminating an eye with a first non-visible light wavelength;
- illuminating the eye with a second non-visible light wavelength different from the first non-visible light wavelength;
- capturing first ocular images from first reflected light having the first non-visible light wavelength;
- and
- capturing second ocular images from second reflected light having the second non-visible light wavelength, wherein the first ocular images and the second ocular images are captured with a camera configured to filter out light that is other than the first non-visible light wavelength and the second non-visible light wavelength.
2 more elements
Dependencies are inferred from the claim text.