Patent ID: 11874110
Assignee: APPLE INC.
Field: Measurement (Instruments)
Classification: CPC G  A | IPC G

Claim 13:
14. An electronic device, comprising:
a self-mixing interferometry sensor, comprising:
a light emitter configured to emit a beam of light; and
a photodetector configured to receive a returned portion of the beam of light; and

a set of one or more optical components positioned over an aperture of the light emitter and comprising a first birefringent wedge, a second birefringent wedge and a Faraday rotator positioned between the first birefringent wedge and the second birefringent wedge, the one or more optical components defining:
a first optical path configured to propagate the emitted beam of light between a first receiving location and a first emission location; and
a second optical path configured to propagate the returned portion of the beam of light between a second receiving location and a second emission location, wherein the first optical path is different from the second optical path.