Optical anti-counterfeiting element and anti-counterfeiting product using same

Abstract

The invention discloses an optical anti-counterfeiting element and a product using the optical anti-counterfeiting element. The optical anti-counterfeiting element comprises a substrate, a micro relief structure and a reflecting layer, wherein the micro relief structure is positioned on the first surface of the substrate; the micro relief structure at least partially covers the first surface of the substrate; the reflecting layer is positioned on the second surface of the substrate; the reflecting layer at least covers the second surface of the substrate; the micro relief structure comprises micro lens arrays and micro image-text arrays which are arranged on the micro lens arrays in an overlapping way; the micro image-text arrays and the micro lens arrays are positioned in the same plane.

Description

technical field [0001] The invention relates to an optical anti-counterfeit element and an anti-counterfeit product using the optical anti-counterfeit element. Background technique [0002] Due to its unique visual effect and easy identification, optical anti-counterfeiting components are widely used in high-security products such as banknotes, credit cards, passports and securities, as well as other high-value-added products. [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. The micro-text array is located near the focal plane of the micro-lens array, and the pattern with a certain depth of field or a dynamic effect is reproduced through the Moire magnification effect of the micro-lens array on the ...

AI Technical Summary

Problems solved by technology

The defect of the anti-counterfeiting element of this structure is: (1) the structure requires that the microlens array and the micro-text array are arranged periodically, and the periodic error is at sub-micron level when making the original plate, so the production difficulty is high; (2) In the production process, the two surfaces of the substrate need to be processed separately in turn, so the process flow is complicated; (3) in the production process, it is necessary to solve the alignment problem of the microlens array and the micro-text array, so the process can be (4) Due to the inability to ensure the strict alignment of the micro-text array and the micro-lens array in the production process, some anti-counterfeiting effects cannot meet expectations or even cannot be achieved

Therefore, the structure of the anti-counterfeit element still has the four defects mentioned above, and, because the micro-text array and the micro-lens array overlap each other and interfere with each other, thus affecting the image quality of the sampled and synthesized reproduced image, further reducing the safety of the security element. The anti-counterfeiting effect and practical value

Images