公开(公告)号：US20240315642A1

公开(公告)日：2024-09-26

申请号：US18593532

申请日：2024-03-01

Applicant: Apple Inc.

Inventor： Fehmi Civitci ,  Aditya B. Nayak ,  Dawei Lu ,  Haokun Li

IPC: A61B5/00

CPC classification number: A61B5/4875

Abstract: Embodiments are directed to an electronic device that includes a housing, a light emitter, a first detector positioned at a first separation distance from the light emitter, and a second detector positioned at a second separation distance from the light emitter. The electronic device can include a processor that is configured to cause the light emitter to emit light toward a user, receive a first measurement from the first detector based on a return of the emitted light from tissue of the user and receive a second measurement from the second detector based on a return of the emitted light from the tissue of the user. The processor can determine a decay constant of the emitted light using the first measurements and the second measurements, and determine a water content metric of the user using the determined decay constant.