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公开(公告)号：US20220316856A1
公开(公告)日：2022-10-06
申请号：US17219779
申请日：2021-03-31
Applicant: Apple Inc.
Inventor： Tong Chen , Fei Tan , Mingzhou Jin
Abstract: An optical sensor system including a semiconductor substrate; a self-mixing interferometry (SMI) sensor formed on the semiconductor substrate and including a semiconductor laser having a resonant cavity; and an array of photodetectors formed on the semiconductor substrate. The SMI sensor is configured to generate an SMI signal responsive to a retro-reflection of electromagnetic radiation emitted by the semiconductor laser and received into the resonant cavity. The array of photodetectors is configured to generate a set of angular-resolved scatter signals responsive to a scatter of the electromagnetic radiation emitted by the semiconductor laser.
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