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Method for carrying out anti-counterfeiting by utilizing structural color

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

Active Publication Date: 2019-10-18
INT ACAD OF OPTOELECTRONICS AT ZHAOQING SOUTH CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Method for carrying out anti-counterfeiting by utilizing structural color
  • Method for carrying out anti-counterfeiting by utilizing structural color
  • Method for carrying out anti-counterfeiting by utilizing 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 application, and particularly relates to a method for carrying out anti-counterfeiting by utilizing structural color. The method comprises a structure based on utilization of the structural color and a using method thereof, wherein the structure by utilizing the structural color comprises a metal substrate and a dielectric filmfrom bottom to top or a non-metal substrate, a metal thin film and a dielectric film from bottom to top; the using method comprises the following steps that a sample of the structure is illuminated, and color changes of the sample are observed through interference and scattering modes; and if different color changes of the sample are represented in the interference and scattering modes, existenceof the structural color in the structure sample based on utilization of the structural color can be judged. According to the method, different changes of the color of the structural color under the interference and scattering conditions can be observed visually, so that the good anti-counterfeiting effect is achieved, and the method is simple in device, easy to operate and high in anti-counterfeiting grade.

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 Applications(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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