Optical interferometry proximity sensor with optical path extender

    公开(公告)号:US11629948B2

    公开(公告)日:2023-04-18

    申请号:US17167218

    申请日:2021-02-04

    Applicant: Apple Inc.

    Abstract: An optical proximity sensor includes an optical path extender that extends an optical path length of the optical proximity sensor without a corresponding extension of a geometric path length of the optical proximity sensor. The optical path extender may be a high-refractive index material positioned along the optical path through the optical proximity sensor. The optical path extender may include one or more redirection features configured to change a direction of the light traveling within the optical proximity sensor. The optical path extender may include a photonic component configured to simulate an extension of the geometric path within an optical proximity sensor by applying a momentum-dependent transfer function to the light traveling through it.

    Optical Interferometry Proximity Sensor with Optical Path Extender

    公开(公告)号:US20220244041A1

    公开(公告)日:2022-08-04

    申请号:US17167218

    申请日:2021-02-04

    Applicant: Apple Inc.

    Abstract: An optical proximity sensor includes an optical path extender that extends an optical path length of the optical proximity sensor without a corresponding extension of a geometric path length of the optical proximity sensor. The optical path extender may be a high-refractive index material positioned along the optical path through the optical proximity sensor. The optical path extender may include one or more redirection features configured to change a direction of the light traveling within the optical proximity sensor. The optical path extender may include a photonic component configured to simulate an extension of the geometric path within an optical proximity sensor by applying a momentum-dependent transfer function to the light traveling through it.

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