Optical anti-counterfeiting element and optical anti-counterfeiting product

Abstract

The embodiment of the invention provides an optical anti-counterfeiting element and an optical anti-counterfeiting product, and belongs to the field of optical anti-counterfeiting. The optical anti-counterfeiting element comprises a base layer, a color function layer and a coating; wherein the color function layer is positioned on the base layer; a first micro-relief structure covers at least onepart of a first region of the color function layer, and the first region is a partial region of the color function layer; the coating only covers the surface of the first micro-relief structure; the first micro-relief structure is defined such that when a light beam irradiates the first micro-relief structure at an angle of incidence, light of a wavelength or range of wavelengths in the light beaminterferes constructively in a reflected light direction, and the color functional layer and the first micro-relief structure are capable of providing optical features having different color characteristics. The optical anti-counterfeiting element has the advantages of high reliability, easiness in identification and difficulty in counterfeiting.

Description

technical field [0001] The invention relates to the field of optical anti-counterfeiting, in particular to an optical anti-counterfeiting element and an optical anti-counterfeiting product. Background technique [0002] In order to prevent counterfeiting by means of scanning and copying, anti-counterfeiting technology of diffractive optical images (such as holograms, dynamic diffraction patterns, etc.) And achieved very good results. For example, large-denomination euro banknotes use diffractive optical image hot stamping logos, small denominations use diffractive optical image hot stamping wide strips, and the Chinese 2005 version of RMB uses diffractive optical image window security lines except for the one-yuan side. Visa, MasterCard and China's UnionPay credit cards have adopted the diffraction optical variable image hot stamping logo, and China's important documents such as ID cards, driver's licenses, and passports have also adopted the diffraction optical variable im...

AI Technical Summary

Problems solved by technology

However, simply using multi-layer coating technology can no longer meet the needs of the anti-counterfeiting field.

[0007] Combining the multi-layer structure coating with the anti-counterfeiting element disclosed in Chinese patent application CN104249597A can bring rich and unique optical anti-counterfeiting features, but since both of them will selectively constructively interfere with the wavelength of incident light, this combination will produce Contradictions, so that the color provided by the multilayer structure coating or the color characteristics provided by the anti-counterfeiting element disclosed in Chinese patent application CN104249597A are obviously weakened, which is not conducive to the identification of anti-counterfeiting features, so it is necessary to further develop new optical anti-counterfeiting elements

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