Optical anti-counterfeiting element and optical anti-counterfeiting product with same

Abstract

The invention provides an optical anti-counterfeiting element and an optical anti-counterfeiting product with the same. The optical anti-counterfeiting element is easy to identify and difficult to counterfeit. The optical anti-counterfeiting element comprises a base material, a sampling synthesis layer and a micro-image layer, wherein the base material comprises a first surface and a second surface which are opposite to each other; the sampling synthesis layer is formed on the first surface of the base material; the micro-image layer is formed on the second surface of the base material and comprises a first surface embossment structure layer, a second surface embossment structure layer, a first color function layer or a second color function layer; the first surface embossment structure layer and the second surface embossment structure layer are formed on the second surface of the base material; the first color function layer is formed on the first surface embossment structure layer, and the second color function layer is formed on the second surface embossment structure layer; the ratio of the surface area to the apparent area of the first surface embossment structure layer is smaller than the ratio of the surface area to the apparent area of the second surface embossment structure layer; the sampling synthesis layer can perform sampling synthesis on the micro-image layer to form an image.

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 using the optical anti-counterfeiting element. Background technique [0002] In order to prevent counterfeiting by means of scanning and copying, optical anti-counterfeiting technology is widely used in various high-security or high-value-added printed materials such as banknotes, cards and product packaging, and has achieved very good results. [0003] Patent documents such as CN101563640, CN101443692, CN101120139, CN101346244, US5712731, US0034082, US4765656, US4892336, CN1271106, CN1552589 and other patent documents disclose the same type of anti-counterfeiting elements with microlens arrays and micrographic arrays on the two surfaces of the substrate respectively. Wherein, the micro-text array is located near the focal plane of the micro-lens array, and a pattern with a certain depth o...

AI Technical Summary

Problems solved by technology

[0005] The above coloring methods have defects in different aspects: the methods disclosed in CN101379423 and US20030179364 are difficult to colorize; the stepped structure and coating used in US20100307705A1 are difficult to realize in production.

The disadvantage of this method is that the light transmittance of the thin metal area is low, the contrast of the photosensitive adhesive is high, the process is complex and the reliability is low, which is not conducive to the implementation of mass production

In addition, for micro-graphics, during the photosensitive process, there will inevitably be a phenomenon that the photosensitive effect extends from the thin metal area to the thick metal area. This defect is common in the micro-processing process and is difficult to achieve in mass production. Avoid, and the scale of this extension is comparable to the fine structure scale of the microtext, so the fine structure of the microtext will not be guaranteed

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