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A method of anti-counterfeiting using structural color

A technology of structural color and color change, applied in the direction of information-carrying cards, printing, etc., to achieve the effect of high anti-counterfeiting level and simple operation of authenticity

Active Publication Date: 2021-08-06
INT ACAD OF OPTOELECTRONICS AT ZHAOQING SOUTH CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above-mentioned technology is used in the patent US20100230615A1 of the American Nanotechnology Security Corporation (USA), but they use luminescent materials, so it cannot be simply attributed to the use of structural color

Method used

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  • A method of anti-counterfeiting using structural color
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  • A method of anti-counterfeiting using structural color

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Embodiment 1

[0031] The following invention combines figure 1 with figure 2 For a more intuitive explanation of the above problems:

[0032] from figure 1 In a, it can be seen that when the substrate is aluminum, the color is not clear in the interference observation mode, but when the substrate is silicon, rich colors can be observed, and the reason for this phenomenon is shown in figure 2 a and 2c, which are the reflectance spectra of the aluminum substrate and the silicon substrate respectively, the difference between the maximum value and the minimum value of the emission spectrum in 2a is small, so the coloring of the sample is not obvious, and when the substrate of the sample is silicon, The maximum value and the minimum value of the reflection spectrum are very different (the minimum value is about zero), so the color of the sample is rich, and the color is formed due to interference, which is directly related to the thickness of the film, so it has different The thickness of ...

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Abstract

The invention belongs to the technical field of optical materials and applications, and in particular relates to an anti-counterfeiting method using structural color. The method includes a structure based on the use of structural color and its use method. The structure using structural color includes a metal substrate and a dielectric film from the bottom up; or, a non-metallic substrate, a metal film and a dielectric film from the bottom up. The method of using the electric thin film includes: illuminating the sample of the structure, observing the color change of the sample through the interference and scattering mode; if it shows a completely different color change under the interference and scattering mode, it can be determined based on the structural color Structural colors are present in the structural samples of . Based on the method provided by the invention, the different color changes of the structural color under interference and scattering conditions can be observed with the naked eye, thereby achieving good anti-counterfeiting effect, and the method has simple device, easy operation and high anti-counterfeiting level.

Description

technical field [0001] The invention belongs to the technical field of optical materials and applications, and in particular relates to an anti-counterfeiting method using structural color. Background technique [0002] Pure physical source structural color is an important means to supplement the inherent color of materials in nature. One such typical structural color is the blue wing of Morpho butterfly, which is a physical phenomenon rather than the result of blue pigments. The vivid colors often cannot be obtained from dyes or pigments. The above-mentioned colors are due to physical effects and rely precisely on the arrangement and combination of materials on the microscopic scale of nanometers. Therefore, they are very suitable for display and bank notes. Sensitive Anti-counterfeiting features for documents, high-value coupons and admission tickets, etc. [0003] Structural color is a physical phenomenon in which light diffracts and interferes in regular structures, wh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B42D25/36B42D25/373B42D25/40
CPCB42D25/36B42D25/373B42D25/40
Inventor 埃泽尔·马丁·阿金诺古薛亚飞楼姝婷保罗·马尔万尼
Owner INT ACAD OF OPTOELECTRONICS AT ZHAOQING SOUTH CHINA NORMAL UNIV
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