Optical system
    2.
    发明授权

    公开(公告)号:US10520734B1

    公开(公告)日:2019-12-31

    申请号:US15866195

    申请日:2018-01-09

    Applicant: Apple Inc.

    Abstract: An electronic device may include a display with a concave surface. A linear polarizer may be formed on the concave surface. A quarter wave plate may receive light from the linear polarizer. A catadioptric lens may have first and second lens elements. The first lens element may have first and second opposing surfaces. The second lens element may have opposing third and fourth surfaces. The first surface may be convex and may face the display. The fourth surface may be concave. The second surface may be concave. The third surface may be convex and may match the second surface. An additional quarter wave plate may be formed as a coating on the third surface. A partially reflective coating may be formed on the first surface. A reflective polarizer may be formed as a coating on the fourth surface. An additional polarizer may be formed on the reflective polarizer.

    Watch band with adjustable fit
    5.
    发明授权

    公开(公告)号:US11540599B1

    公开(公告)日:2023-01-03

    申请号:US16830088

    申请日:2020-03-25

    Applicant: Apple Inc.

    Abstract: Watch bands can be provided with an ability to dynamically adjust the fit of a watch against a wrist of a user. One or more of a variety of tensioning elements can be provided with a shape memory polymer that responds to a stimulus to adjust a fit of the band. Such stimulus can be from user or actively applied by the watch. The shape memory polymer can be a composite material that provides high durability under cyclic stretching and high speed response of shape recovering while avoiding a drastic moduli drop by shape recovering.

    Display Systems With Optical Sensing
    8.
    发明公开

    公开(公告)号:US20230418377A1

    公开(公告)日:2023-12-28

    申请号:US18466723

    申请日:2023-09-13

    Applicant: Apple Inc.

    CPC classification number: G06F3/013 G02B27/0172 G02B2027/0138

    Abstract: A head-mounted device may have catadioptric lenses that each include a partial mirror, a quarter wave plate, and a polarizer. An optical system in the head-mounted device may have an infrared light-emitting device and an infrared light-sensing device. The optical system may illuminate a user's eyes in eye boxes and may gather measurements from the illuminated eye boxes for eye tracking and other functions. The optical system may operate through the catadioptric lenses. To enhance optical system performance, the polarizers may be wire grid polarizers that are formed from conductive lines that exhibit enhanced infrared transmission and/or the quarter wave plates may be formed from cholesteric liquid crystal layers that serve as quarter wave plates at visible wavelengths and that do not serve as quarter wave plates at infrared wavelengths.

    Optical system
    10.
    发明授权

    公开(公告)号:US10901222B2

    公开(公告)日:2021-01-26

    申请号:US16682214

    申请日:2019-11-13

    Applicant: Apple Inc.

    Abstract: An electronic device may include a display with a concave surface. A linear polarizer may be formed on the concave surface. A quarter wave plate may receive light from the linear polarizer. A catadioptric lens may have first and second lens elements. The first lens element may have first and second opposing surfaces. The second lens element may have opposing third and fourth surfaces. The first surface may be convex and may face the display. The fourth surface may be concave. The second surface may be concave. The third surface may be convex and may match the second surface. An additional quarter wave plate may be formed as a coating on the third surface. A partially reflective coating may be formed on the first surface. A reflective polarizer may be formed as a coating on the fourth surface. An additional polarizer may be formed on the reflective polarizer.

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