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    Device optical window camouflage
    12.
    发明授权
    Device optical window camouflage 有权

    公开(公告)号：US11525949B2

    公开(公告)日：2022-12-13

    申请号：US16341709

    申请日：2016-10-20

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Guanglei Du ,  John A. Wheatley ,  Yihang Lv ,  Zhiyong Xu ,  Jingfei Chen

    IPC: G02B5/22 ,  G01N21/15 ,  G02B5/00 ,  G01N21/17

    Abstract: An example article may include an optical filter and a multilayer stack adjacent the optical filter. The multilayer stack may include a plurality of layers. Each respective layer of the plurality layers may define a respective window edge of a plurality of window edges. The plurality of window edges may define an optical window configured to transmit light through the optical filter. At least a first respective window edge of the plurality of window edges may be stepped relative to at least a second respective window edge of the plurality of window edges.

    Color compensating optical filters having low refractive index layer
    13.
    发明授权
    Color compensating optical filters having low refractive index layer 有权

    公开(公告)号：US11448808B2

    公开(公告)日：2022-09-20

    申请号：US16475207

    申请日：2018-01-03

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Guanglei Du ,  John A. Wheatley ,  Matthew E. Sousa ,  Anthony M. Renstrom ,  Neeraj Sharma

    IPC: B32B5/16 ,  G02B5/02 ,  G02B5/28 ,  F21V8/00 ,  G02B1/11

    Abstract: Example systems may include one or both of a light emitter and a light receiver, and an optical filter. The optical filter may include a wavelength selective scattering layer configured to scatter visible light. The optical filter may include a wavelength selective reflecting layer having a predetermined transmission band configured to compensate for a color deviation. The optical filter may include a broadband reflecting layer having a predetermined reflection band configured to compensate for a color deviation. The optical filter may include a low-index layer configured to reduce a color deviation in light emitted by the light emitter or received by the light receiver. The wavelength selective scattering layer may include nanoparticles dispersed in a binder, wherein the ratio of the nanoparticles to the binder by weight is at least 50%. Example articles may include example optical filters.

    OPTICAL SYSTEM WITH SWITCHABLE DIFFUSER
    14.
    发明申请
    OPTICAL SYSTEM WITH SWITCHABLE DIFFUSER 有权

    公开(公告)号：US20220214027A1

    公开(公告)日：2022-07-07

    申请号：US17701881

    申请日：2022-03-23

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： John A. Wheatley ,  Guanglei Du ,  Kenneth A. Epstein

    IPC: F21V14/00 ,  G02B5/02 ,  G02F1/133 ,  G02F1/1334 ,  G02F1/1335 ,  G02F1/137

    Abstract: An optical system including a lighting component and a switchable diffuser in optical communication with the lighting component. The optical system may further include a low absorbing optical component. At least one outer surface of the switchable diffuser and/or the low absorbing optical component includes light redirecting structures. When the switchable diffuser is in a first state and the optical system produces a light output, the light redirecting structures are configured to increase the full width at half-maximum (FWHM) of the light output of the optical system in at least one direction by at least 5 degrees relative to that of an otherwise equivalent optical system that does not include the light redirecting structures.

    OPTICAL FILTER
    19.
    发明申请
    OPTICAL FILTER 审中-公开

    公开(公告)号：US20190137669A1

    公开(公告)日：2019-05-09

    申请号：US16095406

    申请日：2017-05-30

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： John A. Wheatley ,  Gilles J. Benoit ,  Todd A. Ballen ,  Kenneth L. Smith ,  Guanglei Du ,  Edward J. Kivel ,  Rolf W. Biernath ,  Jordan D. Whitney ,  Daniel J. Schmidt

    IPC: G02B5/20 ,  G02B27/28 ,  G02B5/26 ,  G02B5/30

    Abstract: An optical filter including a polarizer and a visible light blocking filter is described. The polarizer is configured to transmit at least 60 percent of light in a first infrared wavelength range that is incident on the polarizer at normal incidence in a first polarization state, to transmit less than 30 percent of light in a second infrared wavelength that is incident on the polarizer at normal incidence in a second polarization state orthogonal to the first polarization state, and to transmit less than 30 percent of light in a third infrared wavelength range that is incident on the polarizer with a 50 degree angle of incidence in the second polarization state. The visible light blocking filter configured to transmit at least 60 percent of light in the first infrared wavelength range at normal incidence in the first polarization state.

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