False proof structure used for card and certificate and its identifying method
An identification method and card technology, which is applied in the field of card anti-counterfeiting technology and public safety, can solve the problems of long detection time, inappropriateness, and high cost of anti-counterfeiting
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Embodiment 1
[0064] Embodiment 1: An anti-counterfeit structure for a card. On the body of the card to be anti-counterfeited, an identification pattern composed of a grating structure is provided. The identification pattern includes at least two types of graphic areas, and the two types of graphic areas are The orientation of the grating structure is arranged orthogonally to form a dual visual channel, and the two graphic areas do not overlap each other; the grating period of the grating structure is 300-500 nanometers, the groove depth is 50-150 nanometers, and the grating structure is filled with A transparent high-refractive index medium layer, the thickness of the medium layer is 20-30 nanometers, and the refractive index of the medium is greater than 1.6. The microstructure can be made by electron beam or laser beam lithography technology, and the high refractive index medium can be made by vacuum coating technology.
[0065] Referring to Figure 7a, this image is a schematic diagram o...
Embodiment 2
[0066] Embodiment 2: An anti-counterfeiting structure for a card. On the body of the card to be anti-counterfeited, an identification pattern composed of a grating structure is provided. The identification pattern includes at least two types of graphic areas, and the two types of graphic areas are The orientation of the grating structure is arranged orthogonally to form a dual visual channel, and the two graphic areas do not overlap each other; the grating period of the grating structure is 300-500 nanometers, the groove depth is 50-150 nanometers, and the grating structure is filled with A transparent high-refractive index medium layer, the thickness of the medium layer is 20-30 nanometers, and the refractive index of the medium is greater than 1.6. There is a third graphic area, which is composed of microstructured graphics with directional scattering characteristics. The line width of the grating structure that constitutes the microstructured graphics varies randomly within ...
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