Patent ID: 11870492
Assignee: APPLE INC.
Field: Measurement (Instruments)
Classification: CPC H  G | IPC G  H

Claim 0:
1. An electronic device for free-space optical communication comprising:
a first substrate comprising a circuit;
a photosensitive element coupled to the first substrate and to the circuit;
a second substrate defined by a body having a thickness, the body defining a first face and a second face opposite the first face, the second substrate:
positioned above, and parallel to, the first substrate; and
extending along at least a portion of a length of the first substrate, the second substrate comprising:
a convex protrusion proud of the first face; and
a tapering protrusion aligned with an optical axis of the convex protrusion, the tapering protrusion proud of the second face and tapering toward the photosensitive element at an angle facilitating total internal reflection such that light incident to the convex protrusion is focused into the tapering protrusion, reflected from a sidewall of the tapering protrusion, and is received at the photosensitive element.