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Visible light-infrared dual-band anti-counterfeit label and preparation method thereof

An anti-counterfeiting label and visible light technology, which is applied to stamps, instruments, identification devices, etc., can solve the problems of high production cost, inability to meet anti-counterfeiting marks, and complicated methods

Active Publication Date: 2021-08-27
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The infrared anti-counterfeiting technology in the above-mentioned prior art needs to use special anti-counterfeiting ink, the production cost is high and the method is relatively complicated
In addition, the above methods are non-reusable designs, which cannot meet the needs of reconfigurable anti-counterfeiting marks in some occasions

Method used

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  • Visible light-infrared dual-band anti-counterfeit label and preparation method thereof
  • Visible light-infrared dual-band anti-counterfeit label and preparation method thereof
  • Visible light-infrared dual-band anti-counterfeit label and preparation method thereof

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Embodiment Construction

[0044] The specific embodiment of the present invention will be described in detail below in conjunction with the accompanying drawings: the case of this embodiment is based on the preparation method and device of the visible light-infrared dual-band anti-counterfeiting label proposed by the present invention, but the scope of protection of the present invention is not limited to the following embodiments with case.

[0045] Such as figure 1 As shown in (a) and (b), the visible light-infrared dual-band anti-counterfeiting label device includes a protective layer 11 , a phase change material layer 12 , a spacer layer 13 , a reflective layer 14 and a substrate layer 15 . Visible light-infrared dual-band anti-counterfeiting labels are under the action of laser pulses, and the phase change material layer absorbs laser pulse energy and generates heat, which causes the phase change material in the phase change material layer to heat up and switch phases in the area irradiated by las...

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Abstract

The invention provides a visible light-infrared dual-band anti-counterfeit label and a preparation method thereof. The anti-counterfeit label comprises a reflecting layer, a spacing layer and a phase change material layer which are sequentially arranged on a substrate. The phase change material layer is provided with an infrared anti-counterfeit pattern composed of two or more stable phase state areas. The preparation method comprises the following steps: sequentially depositing the reflecting layer, the spacing layer, the phase change material layer and the protective layer on the substrate layer; and through laser pulse irradiation, generating phase state or form transformation in a specific area of the phase change material layer, and forming an infrared or visible light anti-counterfeit pattern. By utilizing the characteristics that the spectral radiance of the phase change material in the infrared band is different in different phase states and the scattering coefficient of the material in the visible light band is different in different states, the phase change material layer with different stable phase states is arranged to form the infrared anti-counterfeit pattern, and the convex structure is arranged on the surface of the protective layer to form the visible light anti-counterfeit pattern; and visible light-infrared dual-band anti-counterfeit is realized.

Description

technical field [0001] The invention belongs to the technical field of thermal radiation control and anti-counterfeiting, and in particular relates to a visible light-infrared dual-band anti-counterfeiting label and a preparation method thereof. Background technique [0002] Anti-counterfeiting technology is an important means to ensure information security and safeguard product rights and interests. Optical anti-counterfeiting technologies such as infrared anti-counterfeiting are widely used. The existing infrared anti-counterfeiting technology is mainly realized by using special ink to absorb or reflect infrared light (CN103242708A); it is also realized by using coating patterns with different infrared radiation characteristics (CN101783094B). [0003] The above-mentioned infrared anti-counterfeiting technology in the prior art needs to use special anti-counterfeiting ink, and the production cost is relatively high and the method is relatively complicated. In addition, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09F3/02
CPCG09F3/0291G09F3/0294
Inventor 李强徐梓铨仇旻
Owner ZHEJIANG UNIV
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