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Intelligent infrared and visible light double-waveband camouflage film and preparation method thereof

A visible light, dual-band technology, applied in optics, optical filters, optical components, etc., can solve the problems of high phase transition point temperature, low phase transition point, and material repeatability to be improved, and achieve a large range of infrared emissivity control , fast response effect

Active Publication Date: 2020-10-02
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The temperature of the phase transition point of this technology is too high. To meet the requirements of low temperature for practical application, the phase transition point needs to be further reduced.
The other is the control of surface topography, that is, the emissivity of the surface is controlled by changing the surface topography, but the repeatability of the material needs to be improved.
[0005] Aiming at the problems that the existing intelligent infrared camouflage has a complex structure, requires external energy input, and has a limited control range to meet the practical application, the present invention proposes an intelligent infrared camouflage film that does not require external energy input and can interact with the environment, which can be used Moisture in the environment, combined with the temperature change of the covered target object received by the film, dynamically adjusts the moisture content in the film, coupled with the low infrared emissivity of the bottom high-reflection layer, and then regulates the infrared emissivity of the film; Transparency, based on the principle of structural color to further regulate the color of the visible light band, to achieve infrared and visible dual-band camouflage

Method used

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  • Intelligent infrared and visible light double-waveband camouflage film and preparation method thereof
  • Intelligent infrared and visible light double-waveband camouflage film and preparation method thereof
  • Intelligent infrared and visible light double-waveband camouflage film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A smart infrared and visible light dual-band camouflage film, including infrared high reflection film layer, infrared emissivity control layer (that is, the film has a two-layer structure), infrared high reflection film layer (bottom layer), infrared emissivity control layer (surface layer) Arranged from bottom to top, the infrared emissivity control layer is attached to (that is, it is adhered to the infrared high reflection film layer by means of hydrophilic groups); the infrared high reflection film layer (bottom layer) is a conventional film with a metal reflection layer deposited on the surface , With low infrared emissivity (attached image 3 ); The infrared emissivity control layer (surface layer) is a porous flexible composite film containing a salt solution (such as lithium bromide solution) (attached figure 1 ), transparent under visible light, thus displaying the bottom color; the porous matrix is ​​transparent in the infrared atmospheric window band, and the i...

Embodiment 2

[0047] Such as figure 1 As shown, an intelligent infrared and visible light dual-band camouflage film includes an infrared high-reflection film layer, a visible light color control layer, an infrared emissivity control layer (that is, the film has a three-layer structure), an infrared high-reflection film layer (bottom layer), The visible light color control layer (middle layer) and the infrared emissivity control layer (surface layer) are arranged from bottom to top. The visible light color control layer 2 is plated on the infrared high reflection film layer 3, and the infrared emissivity control layer 1 is attached to (ie: Relying on the hydrophilic group to stick to the visible light color control layer 2; wherein the infrared high reflection film layer (bottom layer) is a conventional film with a metal reflection layer deposited on the surface, which has a low infrared emissivity (attached) image 3 ); The visible light color control layer (intermediate layer) is a nano-leve...

Embodiment 3

[0055] It is basically the same as Embodiment 1 or 2, except for the preparation of the infrared high reflection film layer (bottom layer). The infrared high reflection layer of the present invention uses a stainless steel film with a thickness of 10 μm as a substrate, and metal gold is plated on it as a high reflection layer.

[0056] The preparation steps of the above-mentioned infrared high reflection film layer (bottom layer) are as follows: take a section of stainless steel film (flexible film) with a thickness of 10 μm, and coat it with a gold film with a thickness of about 250 nm by magnetron sputtering. The parameter is bias voltage 50V, power 50W, pressure inside the cavity 2.0Pa. Its infrared reflectance is 0.95; an infrared highly reflective film layer (ie, a highly reflective layer) is obtained.

[0057] Example 3:

[0058] It is basically the same as Embodiment 1 or 2, except for the preparation of the infrared high reflection film layer (bottom layer). The infrared h...

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Abstract

The invention belongs to the technical field of camouflage, particularly relates to an infrared and visible light double-waveband camouflage film and a preparation method thereof, and can be applied to the military field. The film is characterized in that the film comprises an infrared high-reflection film layer and an infrared emissivity regulation and control layer, wherein the infrared high-reflection film layer and the infrared emissivity regulation and control layer are sequentially arranged from bottom to top, and the infrared emissivity regulation and control layer is attached to the infrared high-reflection film layer, wherein the infrared high-reflection thin film layer is a thin film with a metal reflection layer deposited on the surface; and the infrared emissivity regulation and control layer is a porous flexible composite film containing spontaneous water absorption and loss substances. The emissivity of the intelligent infrared camouflage film can be dynamically regulatedand controlled according to the temperature change of a covered object, external energy input is not needed, and the intelligent infrared camouflage film can interact with the environment. The film is small in overall mass, good in flexibility and low in cost, can be applied to industrial large-batch manufacturing, and can be attached to the surfaces of most heating objects.

Description

Technical field [0001] The invention belongs to the field of camouflage technology, and particularly relates to an intelligent infrared and visible light dual-band camouflage film and a preparation method thereof, which can be applied to various fields such as military operations, civil temperature measurement, and biological shielding. Background technique [0002] The basic principle of camouflage technology is to realize the fusion of the object and the surrounding environment by changing the overall or partial optical characteristics of the object. It has very common applications in nature, such as chameleons, dead leaf butterflies, etc., which use camouflage to avoid the hazards of natural enemies; it also has important practical value in the military field, which can improve the concealment of military installations, transportation vehicles, soldiers, etc. , Improve the survivability on the battlefield; it still has a high practicability in the civilian field, can eliminate...

Claims

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Application Information

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IPC IPC(8): G02B5/20G02B5/28G02B1/10
CPCG02B1/10G02B5/20G02B5/208G02B5/281G02B5/282G02B5/285
Inventor 刘抗胡雪蛟刘辉东王晨逸毛铭冉廖雨田
Owner WUHAN UNIV