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US08413908B2 Optical security mark comprising metamaterials with a magnetic response, authentication method using said mark, and use of said mark applied to an object 失效
光学安全标记包括具有磁响应的超材料，使用所述标记的认证方法和应用于对象的所述标记的使用

Optical security mark comprising metamaterials with a magnetic response, authentication method using said mark, and use of said mark applied to an object
Abstract:
The invention relates to an optical security mark that can be applied to an object, said mark comprising a structure made of a metamaterial that generates a magnetic response to incident radiation having a wavelength (λ) corresponding to a specific code of formula μr(λ) where μr is the relative magnetic permeability of the metamaterial and λ is a wavelength of the incident radiation having a value of between 15 nm and 1100 nm, or a specific code of formula λ(μr) or combinations of said codes. Said mark has a first tranverse dimension bx in a first transverse extension of the metamaterial and a second transverse dimension by in a second transverse extension of the metamaterial, different from the first transversal dimension, the first transverse dimension and the second transverse dimension each being at least equal to the wavelength (λ) of the incident radiation.
Abstract(Chinese):

本发明涉及一种可以应用于物体的光学安全标记，所述标记包括由超材料制成的结构，其对具有对应于具体的公式μr（λ）的代码的波长（λ）的入射辐射产生磁响应， 其中μr是超材料的相对磁导率，λ是具有在15nm和1100nm之间的值的入射辐射的波长，或者具有公式λ（μr）的特定代码或所述代码的组合。 所述标记在超材料的第一横向延伸部中具有第一横向尺寸bx，并且在超材料的第二横向延伸中具有第二横向尺寸，其不同于第一横向尺寸，第一横向尺寸和第二横向尺寸各自位于 最小等于入射辐射的波长（λ）。

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