Patent ID: 11906751
Assignee: TOBII AB
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 15:
16. An eye tracking system comprising:
at least one lens for eye-tracking applications wherein the lens has a first protective layer with a first surface, arranged to face towards the eye to be tracked when the lens is used for eye-tracking;
at least one light source, at least partly arranged in contact with the first protective layer, arranged to emit a first light from the first protective layer in a direction towards the eye;
at least one image capturing device, at least partly arranged in contact with the first protective layer, arranged to receive the emitted first light within the first protective layer; and
a refractive element that is arranged in the light path of the first light,
wherein the lens further comprises an absorptive layer, arranged on the far side of the first protective layer seen from the eye to be tracked when the lens is used for eye-tracking, adapted to be absorptive for the majority of the first light.