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公开(公告)号：US20220276091A1
公开(公告)日：2022-09-01
申请号：US17746911
申请日：2022-05-17
Applicant: UbiQD, Inc.
Inventor： Hunter McDaniel , Nikolay S. Makarov , Matthew R. Bergren
Abstract: An optical element is provided which includes an optical fiber, and a plurality of fluorophores disposed inside the optical fiber. The fluorophores have a quantum yield greater than 50%, and emit a spectrum of light having a maximum intensity at wavelengths within the range of 400 nm to 2000 nm.
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公开(公告)号：US20180364098A1
公开(公告)日：2018-12-20
申请号：US16009158
申请日：2018-06-14
Applicant: UbiQD, Inc.
Inventor： Hunter McDaniel , Nikolay S. Makarov , Matthew R. Bergren
Abstract: An optical element is provided which includes an optical fiber, and a plurality of fluorophores disposed inside the optical fiber. The fluorophores have a quantum yield greater than 50%, and emit a spectrum of light having a maximum intensity at wavelengths within the range of 400 nm to 2000 nm.
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公开(公告)号：US20180224375A1
公开(公告)日：2018-08-09
申请号：US15943723
申请日：2018-04-03
Applicant: UbiQD, Inc.
Inventor： Hunter McDaniel
IPC: G01N21/63
CPC classification number: G01N21/63 , G01N21/6408 , G01N21/6489 , G01N2021/6413
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.
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