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    OPTICAL SYSTEMS INCLUDING ANGLE CONTROL FILMS
    73.
    发明公开
    OPTICAL SYSTEMS INCLUDING ANGLE CONTROL FILMS 审中-公开

    公开(公告)号：US20240280739A1

    公开(公告)日：2024-08-22

    申请号：US18570780

    申请日：2022-06-20

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： John A. Wheatley ,  Mark A. Roehrig ,  Zhaohui Yang ,  Bharat R. Acharya ,  David J.W. Aastuen ,  Serena L. Mollenhauer

    IPC: G02B5/30 ,  G02B3/00 ,  G02B5/28

    CPC classification number: G02B5/3041 ,  G02B3/0062 ,  G02B5/28

    Abstract: An optical system includes a lens layer having a first major surface including first and second microlenses and a first light absorbing layer. The light absorbing layer defines first and second through openings with a one-to-one correspondence between the first and second microlenses and respective first and second through openings. Each pair of first microlens and first through opening centered on a first optical axis makes a first angle with a normal to the first light absorbing layer. Each pair of second microlens and second through opening centered on a second optical axis makes a second angle, different than the first angle, with the normal to the first light absorbing layer. A light source emits light incident on the first major surface side. The emitted light includes first and second light beams carrying respective first and second information and propagating substantially parallel to the first and second optical axes, respectively.

    Azimuthally anisotropic polarization sensitive optical filter
    74.
    发明授权
    Azimuthally anisotropic polarization sensitive optical filter 有权

    公开(公告)号：US12066650B2

    公开(公告)日：2024-08-20

    申请号：US18319701

    申请日：2023-05-18

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Bharat R. Acharya ,  John A. Wheatley ,  Andrew J. Carlson

    IPC: F21V8/00

    CPC classification number: G02B6/0056 ,  G02B6/0026 ,  G02B6/0053

    Abstract: An optical construction includes an optical film between first and second prismatic films, which each include pluralities of parallel, linear first and second prisms. Each of the first and second prisms have opposing first and second sides extending from first and second ends of a base of the prism and meeting at a peak. The first and second sides make first and second base angles with the base of the prism. The peaks of the prismatic films face away from each other and the optical film. For a collimated, normally incident light, for at least a first wavelength in a first wavelength range, and for each of first and second polarization states: the optical film has an optical transmission of less than about 1%, and the optical construction transmits at least 1% of the incident light at an oblique angle greater than 5 degrees with respect to the optical film.

    TWO-FACTOR AUTHENTICATION FILM
    78.
    发明公开
    TWO-FACTOR AUTHENTICATION FILM 审中-公开

    公开(公告)号：US20240036235A1

    公开(公告)日：2024-02-01

    申请号：US18266052

    申请日：2021-12-17

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： John A. Wheatley ,  Gilles J. Benoit ,  Mark A. Roehrig ,  Bharat R. Acharya ,  Serena L. Schleusner ,  Zhaohui Yang

    IPC: G02B1/111 ,  G02B5/20 ,  G06V40/13

    CPC classification number: G02B1/111 ,  G02B5/208 ,  G06V40/1318

    Abstract: An optical film (100) includes a plurality of polymeric layers (40) disposed between opposing first (11) and second (12) outer layers, a thinnest polymeric layer in the plurality of polymeric layers disposed closer to the first outer layer (11) and a thickest polymeric layer disposed closer to the second outer layer (12). A layer thickness gradient of the optical film (100) includes first (43) and second (45) portions joined by a step portion (20), a change in thickness across the step portion (20) at least 5 times greater than a change in thickness across each of the first (43) and second (45) portions, wherein the optical film (100) has a first average transmission percentage, TA1, in a first wavelength range, a peak transmission percentage, Tp, in a different, second wavelength range. The first wavelength range and the second wavelength range are separated by a third wavelength range with a third average transmission percentage, TA3, such that TA1>Tp>30(TA3).

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