Differential illumination for corneal glint detection
AssigneeMeta Platforms Technologies, LLC
InventorsAlexander Jobe Fix, Clare Joyce Robinson, Mohammadhossein Daraeihajitooei, Timo Stoffregen
Life of this patent
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Abstract
An apparatus, system, and method for detecting glints includes a pair of light sources positioned on a head-mounted frame and driven to illuminate a corneal surface of an eye with differential light signals. An image sensor is positioned on the head-mounted frame to receive reflections of the differential light signals from the corneal surface. An orientation of a cornea (e.g., corneal sphere) of the eye may be determined at least partially based on the reflections of the differential light signals.
Claims20
A glint detection system comprising:
- a pair of light sources positioned on a head-mounted frame to illuminate a corneal surface of an eye with differential light signals;
- an image sensor positioned on the head-mounted frame to receive reflections of the differential light signals from the eye;
- and
- processing logic coupled to the pair of light sources and to the image sensor, wherein the processing logic drives the pair of light sources to emit the differential light signals, wherein the processing logic receives, from the image sensor, image data that is representative of the reflections of the differential light signals, wherein the processing logic determines an orientation of a cornea of the eye at least partially based on the image data.
A head mounted display comprising:
- a display to provide display light;
- a lens assembly to transmit the display light from the display to an eyebox;
- and
- a glint detection system comprising:
- a pair of light sources positioned on a head-mounted frame to illuminate a corneal surface of an eye with differential light signals;
- an image sensor positioned on the head-mounted frame to receive reflections of the differential light signals from the eye;
- and
- processing logic coupled to the pair of light sources and to the image sensor, wherein the processing logic drives the pair of light sources to emit the differential light signals, wherein the processing logic receives, from the image sensor, image data that is representative of the reflections of the differential light signals, wherein the processing logic determines an orientation of a cornea of the eye at least partially based on the image data.
A method of corneal glint detection using differential lighting comprising:
- driving a pair of light sources to emit differential light signals towards an eye of a user;
- receiving image data from an image sensor, wherein the image data is representative of reflections of the differential light signals off of the eye of the user;
- and
- determining an orientation of a corneal sphere of the eye at least partially based on the image data.
Dependencies are inferred from the claim text.