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    Optical sensor systems
    2.
    发明授权
    Optical sensor systems 有权

    公开(公告)号：US11354880B2

    公开(公告)日：2022-06-07

    申请号：US16758769

    申请日：2018-10-25

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Jonah Shaver ,  Susannah C. Clear ,  John A. Wheatley ,  Kui Chen-Ho

    IPC: G06V10/147 ,  H04B10/116 ,  H04B10/61

    Abstract: Systems, assemblies, and methods for detecting changes in polarization states are described. Example systems may include a light receiving unit including a sensor and a receiving polarizer. The sensor is configured to sense light from a polarized light source deflected through the receiving polarizer by a light directing article. The sensor is configured to generate a signal indicative a received polarization state of light deflected by the light directing articles. Such systems may be coupled to vehicles and may be useful for sensor-detectable signs, indicia, and markings to facilitate automated or assisted vehicular transport.

    MULTI-DISTANCE INFORMATION PROCESSING USING RETROREFLECTED LIGHT PROPERTIES
    3.
    发明申请
    MULTI-DISTANCE INFORMATION PROCESSING USING RETROREFLECTED LIGHT PROPERTIES 有权

    公开(公告)号：US20210279489A1

    公开(公告)日：2021-09-09

    申请号：US17261764

    申请日：2019-09-30

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： John A. Wheatley ,  Susannah C. Clear

    IPC: G06K9/00 ,  G06K9/20 ,  G05D1/02

    Abstract: In some examples, a method may include receiving retroreflected light that indicates at least one retroreflective property of a retroreflective article, wherein retroreflected light is captured at a first distance. The method may include determining a first set of information based at least in part on the at least one retroreflective property of the retroreflective article. The method may include receiving, from the light capture device, an image that includes at least one object, wherein the image is captured at a second distance. The method may include determining, based at least in part on the spatially resolvable property, a second set of information that corresponds to the object in the image. The method may include performing, by a computing device, at least one operation based at least in part on the second set of information.

    Fluid control films with hydrophilic surfaces, methods of making same, and processes for cleaning structured surfaces
    4.
    发明授权
    Fluid control films with hydrophilic surfaces, methods of making same, and processes for cleaning structured surfaces 有权

    公开(公告)号：US10378813B2

    公开(公告)日：2019-08-13

    申请号：US15305524

    申请日：2015-04-22

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Adam J. Meuler ,  Susannah C. Clear ,  Steven P. Swanson ,  Kurt J. Halverson ,  Justin A. Riddle ,  Paul B. Armstrong ,  Caleb T. Nelson ,  Chetan P. Jariwala

    IPC: F25D21/14 ,  C08J5/18 ,  B32B7/06 ,  B32B7/12 ,  B08B1/00 ,  B08B3/10 ,  F15D1/00 ,  B32B3/30

    Abstract: A fluid control film is provided that includes fluid control channels extending along a channel longitudinal axis. Each of the fluid control channels has a surface and is configured to allow capillary movement of liquid in the channels. The fluid control film further includes a hydrophilic surface treatment covalently bonded to at least a portion of the surface of the fluid control channels. The fluid control film exhibits a capillary rise percent recovery of at least ten percent. Typically, the hydrophilic surface treatment includes functional groups selected from a non-zwitterionic sulfonate, a non-zwitterionic carboxylate, a zwitterionic sulfonate, a zwitterionic carboxylate, a zwitterionic phosphate, a zwitterionic phosphonic acid, and/or a zwitterionic phosphonate. A process for forming a fluid control film is also provided. Further, a process for cleaning a structured surface is provided, including providing a structured surface and a hydrophilic surface treatment covalently bonded to at least a portion of the structured surface, and soiling the structured surface with a material. The process also includes removing the material by at least one of submerging the structured surface in an aqueous fluid, rinsing the structured surface with an aqueous fluid, condensing an aqueous fluid on the structure surface, or wiping the structured surface with a cleaning implement.

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