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    • 17. 发明授权
    • Scanners for reading near infrared fluorescent marks
    • 用于阅读近红外荧光标记的扫描仪
    • US5959296A
    • 1999-09-28
    • US880037
    • 1997-06-20
    • Michael John CyrJames John Krutak, Sr.Horst ClaubergRandy Barnett MeadeJames Edward MooreGabor Patonay
    • Michael John CyrJames John Krutak, Sr.Horst ClaubergRandy Barnett MeadeJames Edward MooreGabor Patonay
    • G02B6/38G06K7/12G06K7/10
    • G06K7/12G02B6/3861G02B6/3862G02B6/3887
    • An apparatus for detecting an invisible, near infrared fluorescing mark disposed on a background comprises: includes an excitation source for exciting the mark, having sufficient power to excite the mark and provide a fluorescent signal the mark from a; a signal detector for detecting the fluorescent signal from the mark; a and power modulator means for varying the power if the excitation source between zero and the maximum power level to produce a decodable fluorescent signal from the mark disposed on the background. A process for decoding an invisible mark having a near infrared fluorescing material includes the steps of: providing at least one invisible, near infrared fluorescing mark disposed on at least one portion of a background; exciting the mark with a laser having a maximum power level sufficient to provide a fluorescent signal from the mark; detecting the fluorescent signal and concurrently varying the power of the laser between zero and its maximum power, to obtain a decodable fluorescent signal.
    • 用于检测设置在背景上的不可见的近红外荧光标记的装置包括:包括用于激发标记的激励源,具有足够的功率来激发标记并从a提供标记的荧光信号; 用于从标记检测荧光信号的信号检测器; a和功率调制器装置,用于如果激励源在零和最大功率水平之间改变功率,以从设置在背景上的标记产生可解码的荧光信号。 用于解码具有近红外荧光材料的不可见标记的方法包括以下步骤:提供设置在背景的至少一部分上的至少一个不可见的近红外荧光标记; 使用具有足以提供来自标记的荧光信号的最大功率电平的激光器来激发标记; 检测荧光信号并同时改变激光器在0和最大功率之间的功率,以获得可解码的荧光信号。
    • 20. 发明授权
    • Pigment particles for invisible marking applications
    • 用于不可见标记应用的颜料颗粒
    • US06221279B1
    • 2001-04-24
    • US09339125
    • 1999-06-24
    • Marc Alan StrandCrystal Leigh KendrickMichael John Cyr
    • Marc Alan StrandCrystal Leigh KendrickMichael John Cyr
    • C09K1106
    • C09K11/02C09D5/22C09K11/06
    • A pigment composition includes a crystalline thermoplastic polyester resin having residues of at least one dicarboxylic acid and a near-infrared fluorescing compound having a fluorescence between about 650 nm to about 2500 nm associated with the crystalline thermoplastic polyester, wherein the polyester has an intrinsic viscosity (IV) of less than about 0.37. A preferred polyester is polybutylene terephthalate. Another aspect is a method for providing a detectable or identifiable marking that is invisible to the unaided eye on a surface of a substrate is also provided. The method includes the steps of applying to the surface a marking composition comprising a suitably compatible marking fluid containing the fluorescent pigment composition. The near infrared fluorescing pigment composition is useful in letterpress, flexographic and gravure printing applications.
    • 颜料组合物包括具有至少一种二羧酸残基的结晶热塑性聚酯树脂和具有与结晶热塑性聚酯相关的约650nm至约2500nm之间的荧光的近红外荧光化合物,其中该聚酯具有特性粘度( IV)小于约0.37。 优选的聚酯是聚对苯二甲酸丁二醇酯。 还提供了一种用于提供在基底表面上对肉眼不可见的可检测或可识别标记的方法。 该方法包括以下步骤:向表面施加包含含有荧光颜料组合物的适当兼容的标记液的标记组合物。 近红外荧光颜料组合物可用于凸版,柔版印刷和凹版印刷应用。