An optical anti-counterfeiting element and products using the optical anti-counterfeiting element

Abstract

The invention aims to overcome defects that in prior art, the optical anti-counterfeiting element is difficult in production, complicated in process and low in process control and strict alignment of the micro graphics array and the micro lens array can't be guaranteed during the production, and provides an optical anti-counterfeiting element and products utilizing the same. The optical anti-fake element comprises base material, a micro relief structure which is arranged on a first surface of the base material and at least partially covers the first surface of the base material, and a reflecting layer which is arranged on a second surface of the base material and at least partially covers the second surface of the base material. The micro relief structure comprises a micro lens array and a micro graphics array which is embedded in the micro lens array and is in the same plane with the micro lens array but is not overlapped with the micro lens array. The micro lens array is capable of sampling and synthesizing the micro graphics array through the reflecting layer so as to produce represented images.

Description

technical field [0001] The present invention relates to the field of anti-counterfeiting, in particular to an optical anti-counterfeiting element suitable for various high security products and high value-added products such as banknotes, credit cards, passports and securities, and also to products using the optical anti-counterfeiting element, such as banknotes, Credit cards, passports and securities, etc. 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 s...

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

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