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Optical anti-counterfeit element

An optical anti-counterfeiting and component technology, applied in the direction of diffraction gratings, chemical instruments and methods, synthetic resin layered products, etc., can solve the problems of incompatibility with the grating structure, combination, coating color is not rich, etc., to achieve new optical effects, simple structure , rich color effect

Active Publication Date: 2014-09-24
ZHONGCHAO SPECIAL SECURITY TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the defects in the prior art that the coating color is not rich, it is not conducive to large-scale production, or it cannot be combined with the grating structure, it provides an optical fiber with rich coating color, which is suitable for large-scale production and can be combined with the grating structure. Security element

Method used

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Embodiment Construction

[0020] The optical anti-counterfeiting element according to the present invention will be described in detail below with reference to the accompanying drawings.

[0021] figure 1 A cross-sectional view of an optical anti-counterfeit element 1 according to an embodiment of the present invention is shown, wherein the optical anti-counterfeit element 1 includes a substrate 20 and a first coating 30, and the substrate 20 includes a first surface and a second surface, so The first coating layer 30 includes a reflective layer 31 formed on the first surface and a dielectric layer 32 formed on the reflective layer 31, and the dielectric layer 32 is formed of a dielectric material with a refractive index greater than 1.8.

[0022] according to figure 1 In the optical anti-counterfeiting element of the embodiment shown, when the first surface of the substrate 20 is a flat surface, the color of the first coating layer 30 will vary with the material and thickness of the reflective layer ...

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Abstract

Aimed at the shortcomings that the plating color is not rich, large-scale production is not facilitated or combination with a grating structure is unavailable in the prior art, the invention provides an optical anti-counterfeit element which has rich plating color, is suitable for large-scale production and can be combined with a grating structure. The invention provides an optical anti-counterfeit element which comprises a base material and a first plating, wherein the base material comprises a first surface and a second surface; the first plating comprises a first reflection layer fully or partially formed on the first surface and a first medium layer formed on the first reflection layer; and the first medium layer is made from a medium material with a refractive index of greater than 1.8.

Description

technical field [0001] The invention relates to the field of optical anti-counterfeiting, in particular to an optical anti-counterfeiting element. Background technique [0002] Today, optically variable technology is widely used in the public anti-counterfeiting of high security securities such as banknotes. Device imitation or duplication. Currently common optical anti-counterfeiting technologies such as holographic relief structure, sub-wavelength grating structure and color shift are closely related to or completely based on the coating technology used. Among them, for holographic or zero-level technology, the coating is silvery white (for example, using Al) or colorless and transparent (for example, using ZnS), which lacks enough public visual appeal; optical change has also been used in the field of anti-counterfeiting for 30 years. More than a few years, but its anti-counterfeiting features need to be further improved and improved. [0003] Combining the color coati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/06B32B27/36B32B15/04B32B15/20B32B9/04G02B5/18
Inventor 张巍巍孙凯王晓利张宝利朱军
Owner ZHONGCHAO SPECIAL SECURITY TECH
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