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    • 2. 发明申请
    • AUTHENTICATION APPARATUS AND METHOD
    • 认证装置和方法
    • WO2017009632A1
    • 2017-01-19
    • PCT/GB2016/052101
    • 2016-07-12
    • INNOVIA FILMS LIMITED
    • STEWART, Robert Laird
    • G07D7/12
    • G07D7/205G07D7/1205
    • An authentication apparatus operative to determine the authenticity of a polymer film, comprising an optically-based birefringence measuring apparatus operative to: •expose the film to a first light source of a first wavelength or range of wavelengths; • expose the film to a second light source of a second wavelength or range of wavelengths, the first wavelength or range of wavelengths being different from the second wavelength or range of wavelengths; • measure a first effect influenced by a birefringence characteristic of the film responsive to said first light source; • measure a second effect influenced by a birefringence characteristic of the film responsive to said second light source; • compare a value or range of values representative of a comparison between the first and second effects with a value or range of values representative of a comparison between a specified first effect and a specified second effect corresponding to a predetermined birefringence characteristic of an authentic polymer film responsive to the first and second light sources; and • output an authenticity signal indicative of authenticity or otherwise of the film based upon one or more of the comparisons.
    • 一种用于确定聚合物膜的真实性的认证装置,包括基于光学的双折射测量装置,其操作为:将膜暴露于第一波长或波长范围的第一光源; •将所述胶片暴露于第二波长或波长范围的第二光源,所述第一波长或波长范围不同于所述第二波长或波长范围; •响应于所述第一光源测量受到所述膜的双折射特性影响的第一影响; •响应于所述第二光源测量受到所述膜的双折射特性影响的第二效应; •将代表第一效应和第二效果之间的比较的值的值或范围与代表指定的第一效果和对应于可靠聚合物膜的预定双折射特性的指定的第二效果之间的比较的值或值范围进行比较 响应于第一和第二光源; 以及•基于所述比较中的一项或多项来输出指示所述电影的真实性或其他形式的真实性信号。