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    Authentication of quantum dot security inks
    2.
    发明授权
    Authentication of quantum dot security inks 有权

    公开(公告)号：US10724951B2

    公开(公告)日：2020-07-28

    申请号：US15943723

    申请日：2018-04-03

    Applicant: UbiQD, Inc.

    Inventor： Hunter McDaniel

    IPC: G01N21/63 ,  G01N21/64

    Abstract: A method is provided for verifying the authenticity of an article which bears a security mark. The method includes irradiating the security mark with a time-varying light source, ascertaining at least one portion of the emissions spectrum of the irradiated security mark with at least one photodetector, determining the photoluminescence lifetime of the security mark by monitoring the time or frequency response of the photodetector, and verifying the authenticity of the article only if the security mark exhibits a photoluminescence which has a lifetime that falls within the range of appropriate values for each portion of the photoluminescence spectrum for which the photoluminescence lifetime of said security mark was ascertained.

    LUMINESCENT OPTICAL ELEMENTS FOR AGRICULTURAL APPLICATIONS
    3.
    发明申请
    LUMINESCENT OPTICAL ELEMENTS FOR AGRICULTURAL APPLICATIONS 审中-公开

    公开(公告)号：US20200176625A1

    公开(公告)日：2020-06-04

    申请号：US16612344

    申请日：2018-05-09

    Applicant: UbiQD, Inc.

    Inventor： Hunter McDaniel ,  Matthew Bergren

    IPC: H01L31/054 ,  B32B17/10 ,  F24S23/00 ,  A01G9/14 ,  H01L31/055

    Abstract: An optical element is provided which comprises a plurality of fluorophores disposed in a medium. The fluorophores have a quantum yield greater than 50% and an absorption spectrum with a maximum intensity at wavelengths less than 400 nm, and emit a spectrum of light having a maximum intensity at wavelengths within the range of 400 nm to 1200 nm. The optical element is at least partially transparent over the visible region of the spectrum. The optical element is especially useful as a window or other optical component of a greenhouse structure.

    Authentication of quantum dot security inks
    6.
    发明授权
    Authentication of quantum dot security inks 有权

    公开(公告)号：US11493444B2

    公开(公告)日：2022-11-08

    申请号：US16909842

    申请日：2020-06-23

    Applicant: UbiQD, Inc.

    Inventor： Hunter McDaniel

    IPC: G01N21/63 ,  G01N21/64

    Abstract: A method is provided for verifying the authenticity of an article which bears a security mark. The method includes irradiating the security mark with a time-varying light source, ascertaining at least one portion of the emissions spectrum of the irradiated security mark with at least one photodetector, determining the photoluminescence lifetime of the security mark by monitoring the time or frequency response of the photodetector, and verifying the authenticity of the article only if the security mark exhibits a photoluminescence which has a lifetime that falls within the range of appropriate values for each portion of the photoluminescence spectrum for which the photoluminescence lifetime of said security mark was ascertained.

    AUTHENTICATION OF QUANTUM DOT SECURITY INKS
    8.
    发明申请
    AUTHENTICATION OF QUANTUM DOT SECURITY INKS 审中-公开

    公开(公告)号：US20200319105A1

    公开(公告)日：2020-10-08

    申请号：US16909842

    申请日：2020-06-23

    Applicant: UbiQD, Inc.

    Inventor： Hunter McDaniel

    IPC: G01N21/63 ,  G01N21/64

    Abstract: A method is provided for verifying the authenticity of an article which bears a security mark. The method includes irradiating the security mark with a time-varying light source, ascertaining at least one portion of the emissions spectrum of the irradiated security mark with at least one photodetector, determining the photoluminescence lifetime of the security mark by monitoring the time or frequency response of the photodetector, and verifying the authenticity of the article only if the security mark exhibits a photoluminescence which has a lifetime that falls within the range of appropriate values for each portion of the photoluminescence spectrum for which the photoluminescence lifetime of said security mark was ascertained.

    Apparatus for analyzing quantum dot security inks
    9.
    发明授权
    Apparatus for analyzing quantum dot security inks 有权
    用于分析量子点安全墨水的设备

    公开(公告)号：US09540523B1

    公开(公告)日：2017-01-10

    申请号：US15173943

    申请日：2016-06-06

    Applicant: UbiQD, Inc.

    Inventor： Hunter McDaniel

    IPC: C09D5/22 ,  G01N21/64 ,  C09D11/037 ,  G07D7/12

    CPC classification number: C09D5/22 ,  B41M3/144 ,  C09D11/037 ,  C09D11/322 ,  C09D11/50 ,  G01N21/6408 ,  G01N21/643 ,  G01N21/6489 ,  G01N2201/061 ,  G01N2201/062 ,  G07D7/1205

    Abstract: A security ink is provided which includes a liquid medium having a plurality of quantum dots disposed therein. Upon excitation with a suitable light source, the ink exhibits a quantum yield greater than 30%, and a photoluminescence which has a lifetime of more than 40 nanoseconds and which varies by at least 5% across the emission spectrum of the quantum dots. Also disclosed are apparatuses for using the same for anti-counterfeit or authentication purposes, which uniquely identifying the presence of photoluminescent materials by spectrally resolving their photoluminescence lifetime.

    Abstract translation: 提供一种安全油墨，其包括其中设置有多个量子点的液体介质。 当用合适的光源激发时，油墨显示出大于30％的量子产率，以及寿命大于40纳秒并且在量子点的发射光谱上变化至少5％的光致发光。 还公开了将其用于防伪或认证目的的装置，其通过光谱解析其光致发光寿命来唯一地识别光致发光材料的存在。

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