Patent ID: 11914162
Assignee: META PLATFORMS TECHNOLOGIES, LLC
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. An eye-tracking system, comprising:
a first mirror;
a second mirror optically coupled with the first mirror, wherein:
the first mirror is positioned to:
transmit first light reflected off an eye of a user toward the second mirror, the first light received by the first mirror at a first incident angle; and
reflect the first light received by the first mirror, reflected from the second mirror, at a second incident angle that is greater than the first incident angle; and

the second mirror is inclined at an acute angle from the first mirror so that the first light transmitted through the first mirror is reflected by the second mirror toward the first mirror at a first reflection angle, and the first light reflected by the second mirror is reflected by the first mirror toward the second mirror at a second reflection angle that is greater than the first reflection angle; and

one or more sensors positioned to detect the first light reflected by the first mirror and the second mirror for determining a gaze direction of the eye of the user.