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

An optical anti-counterfeiting and component technology, which is applied to patterns, prints, special patterns, etc. characterized by light projection effects, can solve the problems that the structure cannot be colored, and the plane covering method is difficult to achieve, and achieves strong public attraction. Easy-to-recognize and process-feasible effects

Active Publication Date: 2016-04-13
ZHONGCHAO SPECIAL SECURITY TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The above two coloring methods have defects in different aspects: the structure disclosed in US20030179364 cannot realize colored coloring; the stepped structure and plating layer used in US20100307705A1 are difficult to realize in production.

Method used

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  • Optical anti-counterfeiting element and optical anti-counterfeiting product using optical anti-counterfeiting element
  • Optical anti-counterfeiting element and optical anti-counterfeiting product using optical anti-counterfeiting element
  • Optical anti-counterfeiting element and optical anti-counterfeiting product using optical anti-counterfeiting element

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preparation example Construction

[0038] figure 2 The preparation method shown is to prepare Figure 1a The optical security elements shown are targeted. First, prepare the sampling composite layer 21 on the first surface 31 of the substrate 2 and prepare the sinusoidal one-Via wavelength grating structure 41 on the second region on the second surface 32 of the substrate 2, the period of the grating structure is 245 nm and a depth of 150 nm, the first region on the second surface 32 is a flat region. Then, on the second surface 32 of the substrate 2, directly deposit an Al layer with a thickness of 60nm (with the thickness on the first region as a reference), and then deposit a thickness of 50nm on the Al layer (with a thickness on the first region of Reference) Si, then the whole structure is placed in NaOH solution (temperature 40 ℃, concentration 5%) and soaked for 18 seconds, then the Si layer and Al layer formed on the second area disappear completely successively, and the Al layer formed on the first a...

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Abstract

The invention relates to the field of optical anti-counterfeiting, and discloses an optical anti-counterfeiting element and an optical anti-counterfeiting product using the optical anti-counterfeiting element. The optical anti-counterfeiting element comprises a base material including a first surface and a second surface independent from each other, a sampling synthesis layer positioned on the first surface of the base material, and a micro-image layer positioned on the second surface of the base material and including a first area and a second area; at least one part of the first area is covered with a plating layer; the second area includes at least two subareas; at least one part of each subarea is covered with a color function layer; the color function layer in each subarea and the plating layer in the first area have different color characteristics; and the micro-image layer can be sampled and synthesized by the sampling synthesis layer to form an image. The optical anti-counterfeiting element has the characteristics of easy identification and difficult 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 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...

Claims

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Application Information

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IPC IPC(8): B42D25/30B42D25/36B42D25/373B42D25/364B42D25/369B42D25/378
CPCB42D15/00B44F1/00B42D25/342B42D25/30B42D25/21B42D25/328B42D25/351B42D25/364
Inventor 朱军张宝利叶中东胡春华李欣毅
Owner ZHONGCHAO SPECIAL SECURITY TECH
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