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    • 7. 发明授权
    • Fluorescence authentication reader with coaxial optics
    • 具有同轴光学的荧光认证读取器
    • US5574790A
    • 1996-11-12
    • US575729
    • 1995-12-18
    • Louis H. LiangDaniel A. MarinelloWilliam J. RyanDavid SilverglateDonald L. Wray
    • Louis H. LiangDaniel A. MarinelloWilliam J. RyanDavid SilverglateDonald L. Wray
    • G02B6/38G06K7/12G07D7/12H04L9/00
    • G07D7/121G06K7/12G07D7/122G02B6/3839G02B6/3861
    • A multiple-reader system for authentication of articles uses a first reader (400) which employs predetermined modulated illuminating light (20) and a multiplicity of discriminating variables, such as wavelengths (110), amplitudes (120), and time delays (140) relative to the modulated illuminating light (20) to characterize fluorescent light (70) detected from fluorescent indicia on the articles. The fluorescent indicia may also incorporate spatial distributions such as bar codes as discriminating features. Additional readers (410 and 420), which may be readers of fluorescent marks and/or readers of other indicia, are synchronized with the fluorescence reader by timing signals. The discriminating features may be re-programmed by the user of the authentication system. Thus the discriminating features define a user-determined and programmable encryption of the articles' authentic identity. The outputs provided by individual readers (400, 410 and 420) are combined by a computer (85) programmed to produce the authentication result. The fluorescence authentication reader includes integration and synchronization of multiple readers of various types, an improved coaxial optics subsystem (450), and electronic circuitry with improved time-base stability, which cooperate in enhancing signal/noise ratio. The resultant stable triggering of the authentication output of the individual fluorescence reader, combined with time synchronization of the individual fluorescence reader with other readers, provides a reliable integrated multi-reader authentication system.
    • 用于物品认证的多读取器系统使用采用预定调制照明光(20)的第一读取器(400)和诸如波长(110),幅度(120)和时间延迟(140)的多个鉴别变量, 相对于经调制的照明光(20),以表征从物品上的荧光标记检测到的荧光(70)。 荧光标记还可以包括诸如条形码之类的空间分布作为鉴别特征。 可以是荧光标记的读取器和/或其他标记的读取器的其他读取器(410和420)通过定时信号与荧光读取器同步。 鉴别特征可由认证系统的用户重新编程。 因此,识别特征定义了用户确定的和可编程的加密文章的真实身份。 由各个读取器(400,410和420)提供的输出由编程为产生认证结果的计算机(85)组合。 荧光认证读取器包括各种类型的多个读取器的集成和同步,改进的同轴光学子系统(450)和具有改进的时基稳定性的电子电路,其在增强信号/噪声比方面协作。 结果,单个荧光读取器的认证输出的稳定触发以及单独荧光读取器与其他读取器的时间同步提供了可靠的集成多读取器认证系统。