WO2021203693A1

WO2021203693A1 - Ultra-thin optical camouflage material

Info

Publication number: WO2021203693A1
Application number: PCT/CN2020/126816
Authority: WO
Inventors: 朱昊枢; 叶瑞; 左志成; 刘朋; 陈林森; 朱志坚
Original assignee: 苏州苏大维格科技集团股份有限公司; 江苏维格新材料科技有限公司
Priority date: 2020-04-07
Filing date: 2020-11-05
Publication date: 2021-10-14
Also published as: CN211528737U

Abstract

An ultra-thin optical camouflage material (10), used for attaching onto a target object to be covered and for adhering to the target object to be covered, the material at least comprising a plurality of first film layers (11), and a plurality of second film layers (12). The refractive index of the first film layers (11) is larger than the refractive index of the second film layers (12), the plurality of first film layers (11) and the plurality of second film layers (12) are alternately stacked, and the outermost layer away from the target object to be covered is a first film layer (11). The first film layers (11) and the second film layers (12) are all inorganic non-metallic material film layers. By means of using an inorganic non-metallic material both for the first film layers (11) and the second film layers (12), a higher reflectivity can be achieved with fewer layers, thus providing a small overall material width, good flexibility, and good heat dissipation by the inorganic non-metallic material.

Description

Ultra-thin optical stealth material

This application claims the priority of the Chinese patent application whose application date is April 07, 2020 and the application number is 202020488166.3, the entire content of which is incorporated into this application by reference.

Technical field

The utility model relates to an ultra-thin optical stealth material.

Background technique

With the explosive development of the communication industry, it is necessary to continuously increase the capacity and quantity of signal transmission and transmission devices in different communication systems to catch up with the pace of new demands. The aesthetics of each signal transmission and transmission device has become an urgent solution. The problem. In addition, since it needs to be perfectly attached to the concealed object, the thickness of the material cannot be too thick.

Utility model content

The purpose of the utility model is to provide an ultra-thin optical stealth material, which can fit the target to be covered and conceal the original appearance of the covered target, the film thickness is small, the flexibility is good, and the signal transmission efficiency is high.

In order to achieve the above purpose, the present invention provides the following technical solutions: an ultra-thin optical stealth material, which is used to attach to and adhere to the target to be covered, and includes at least a number of first film layers And a plurality of second film layers, the refractive index of the first film layer is greater than the refractive index of the second film layer, and a plurality of the first film layers and a plurality of the second film layers are alternately stacked, and The outermost part far away from the target to be covered is the first film layer; the first film layer and the second film layer are both inorganic non-metallic material film layers.

Further, the refractive index difference between the first film layer and the second film layer is 0.05-2.

Further, the refractive index of the first film layer is greater than 2, and the refractive index of the second film layer is less than 2.

Further, the material of the first film layer is zinc sulfide or titanium dioxide or niobium pentoxide; the material of the second film layer is magnesium fluoride or silicon dioxide or aluminum fluoride or aluminum oxide.

Further, a plurality of the first film layers have the same material, or at least two of the first film layers have different materials.

Further, a plurality of the second film layers have the same material, or at least two of the first film layers have different materials.

Further, the ultra-thin optical stealth material further includes a transparent protective layer, and the transparent protective layer is located on the outer side of the first film layer away from the target object to be covered.

Further, the material of the transparent protective layer is a transparent resin coating or a film layer.

Further, the ultra-thin optical stealth material further includes a bearing layer, and the bearing layer is located close to the outer side of the first film layer or the second film layer that covers the target.

Further, the ultra-thin optical stealth layer further includes a pressure-sensitive adhesive layer, which is close to the outer side of the first film layer or the second film layer covering the target, and a release paper layer is provided on one side of the pressure-sensitive adhesive layer.

The beneficial effects of the utility model are:

The utility model adopts inorganic non-metallic materials for both the first film layer and the second film layer, and a small number of layers can achieve higher reflectivity, so that the overall material thickness is small, the flexibility is good, and the inorganic non-metallic materials have good heat dissipation. .

The above description is only an overview of the technical solution of the present utility model. In order to have a clearer understanding of the technical means of the present utility model and can be implemented in accordance with the content of the specification, the following is a detailed description of the preferred embodiment of the present utility model with accompanying drawings. Rear.

Description of the drawings

Figure 1 is a schematic diagram of the structure of the optical stealth material of the present invention.

2 is a schematic diagram of the structure of the optical stealth material in the first embodiment.

3 is a schematic diagram of the structure of the optical stealth material in the second embodiment.

Detailed ways

The specific implementation of the present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.

Referring to Figure 1, the optical stealth material 10 shown in a preferred embodiment of the present invention is used to attach to the target to be covered, and to fit the target to be covered, specifically the optical stealth material 10 can be formed into the same shape as the object to be covered. The target to be covered may be a communication element, such as a mobile phone screen, etc., which is not specifically limited here. The optical stealth material 10 at least includes a plurality of first film layers 11 and a plurality of second film layers 12. A plurality of the first film layers 11 and a plurality of the second film layers 12 are alternately arranged, and the outermost part far away from the target to be covered is the first film layer 11; the plurality of first film layers 11 and a plurality of The number of layers of the two second film layers 12 may be the same, for example, the first film layer 11 has 4 layers, and the second film layer 12 has 4 layers, which is not limited here. At this time, the outermost side far from the target to be covered is the first film layer 11, and the outer side close to the target to be covered is the second film layer 12. It can also be that the number of the first film layer 11 is one more than the number of the second film layer 12. For example, the first film layer 11 has 5 layers and the second film layer 12 has 4 layers; or the first film layer 11 has 3 layers, The two film layers are three layers, which are not specifically limited here. At this time, the outermost side far from the target to be covered is the first film layer 11, and the outer side close to the target to be covered is also the first film layer 11. The refractive index of the first film layer 11 is greater than the refractive index of the second film layer 12, and the refractive index difference between layers is 0.05-2. The purpose of this setting is: after the incident light passes through the refraction and reflection of each interface, the reflectivity of the reflected light is greatly increased, and a wide area of reflected light is presented, so that the optical stealth material 10 has high reflectivity and a wide reflection area, so that The observer observes the reflected light from the surrounding environment in a large range, so as to well conceal the original appearance of the covering.

In detail, the first film layer 11 and the second film layer 12 are both inorganic non-metallic material film layers. The first film layer 11 is a high refractive index inorganic non-metallic material film layer. Specifically, the selected range of the refractive index of the first film layer 11 is greater than 2, and preferably, the refractive index is selected to be 2.4, which is not specifically limited here. The material of the inorganic non-metallic material film layer is selected to be zinc sulfide, titanium dioxide or niobium pentoxide, so that the overall material has a small thickness and good flexibility. It is true that in other embodiments, the material of the first film layer 11 may also be other, which depends on the situation and is not specifically limited here. The second film layer 12 is a low refractive index inorganic non-metallic material film layer, and the refractive index of the second film layer 12 is selected to be less than 2, preferably, the refractive index is selected to be 1.38, which is not limited here. The material of the inorganic non-metallic material film layer is magnesium fluoride or silicon dioxide or aluminum fluoride or aluminum oxide.

Since both the first film layer 11 and the second film layer 12 are made of inorganic non-metallic materials, and based on the heat dissipation characteristics of inorganic non-metallic materials, the optical stealth material 10 has the advantage of good heat dissipation performance. .

The materials of the plurality of first film layers 11 may be the same, or the materials of at least two of the first film layers 11 may be different; the materials of the plurality of second film layers 12 may be the same or at least two of the first film layers 11 The material is different. That is, when the number of the first film layer 11 is two or more, the material of the first film layer 11 may be the same or not completely the same or completely different; when the number of the second film layer 12 is two or more, the first film layer 11 The materials of the two film layers 12 are the same or not completely the same or completely different.

It should be noted that in practical applications, the ultra-thin optical stealth material 10 also includes a transparent protective layer (see Figure 3) and/or a carrier layer (see Figure 3) and/or a pressure-sensitive adhesive layer (see image 3). The arrangement of the transparent protective layer is as follows: the transparent protective layer is located on the outer side of the first film layer 11 away from the target object to be covered. The transparent protective layer is a transparent resin coating or a film layer. Through this setting, the abrasion resistance, water resistance, weather resistance, and UV resistance of the optical material can be effectively improved. The arrangement of the carrier layer is as follows: the carrier layer is located close to the outer side of the first film layer 11 or the second film layer 12 that covers the target. Play a bearing role through this setting. The arrangement of the pressure-sensitive adhesive layer is as follows: the pressure-sensitive adhesive layer is close to the outer side of the first film layer 11 or the second film layer 12 covering the target, and release paper is arranged on one side of the pressure-sensitive adhesive layer Floor. Through this setting, the covering to be concealed can be attached to the covering target, the release paper layer is peeled off during use, and the pressure-sensitive adhesive layer contacts the covering that needs to be concealed and is pasted on the surface of the covering.

The ultra-thin optical stealth material will be described in detail below with two specific embodiments.

Example one:

Please refer to FIG. 2, the ultra-thin optical stealth material 20 in the first embodiment includes a plurality of the first film layers 21, a plurality of second film layers 22, and a carrier layer 23. The first film layer 21 and the second film layer 22 are alternately arranged in multiple layers, and the outermost part far away from the target to be covered is the first film layer 21, and the first film layer 21 is located on the second film layer 22 Outside. The carrier layer 23 is located close to the outer side of the first film layer 21 or the second film layer 22 covering the target. The first film layer 21 is provided as three layers, and the second film layer 22 is provided as three layers. The first film layer 21 is a high refractive index inorganic non-metallic material film layer, and the specific material is titanium dioxide, which is prepared by vacuum magnetron sputtering, and its refractive index is 2.35; the second film layer 22 is a low refractive index inorganic non-metallic material film layer. The metal material, the specific material is magnesium fluoride, is prepared by vacuum magnetron sputtering, and its refractive index is 1.38, and the refractive index difference between layers is 0.97. The overall reflectivity of the ultra-thin optical stealth material 20 of the present invention in the visible light waveband is greater than 80%, and the signal transmission rate is greater than 90%.

Embodiment two:

Referring to FIG. 3, the ultra-thin optical stealth material 30 in the second embodiment includes a plurality of the first film layers 31, a plurality of second film layers 32, a transparent protective layer 35, a pressure-sensitive adhesive layer 33, and release paper Layer 34. The first film layer 31 and the second film layer 32 are alternately arranged in multiple layers, and the outermost part far away from the target to be covered is the first film layer 31, and the first film layer 31 is located on the second film layer 32 Outside. The transparent protective layer 35 is located on the outer side of the first film layer 31 away from the target object to be covered. The pressure-sensitive adhesive layer 33 is close to the outer side of the first film layer 31 or the second film layer 32 covering the target, and a release paper layer 34 is provided on one side of the pressure-sensitive adhesive layer 33. The first layer of film is set to be three layers, and the second layer of film is set to be three layers. The first film layer is an inorganic non-metal film layer with a high refractive index, one layer is a titanium dioxide film layer 311, which is made by vacuum sputtering, and its refractive index is 2.35; the second layer is a zinc sulfide film layer 312, which is vacuum evaporated It is made by plating method, and its refractive index is 2.4. The second film layer 32 is an inorganic non-metal film layer with a low refractive index, specifically a magnesium fluoride film layer, which is produced by a nano-coating method, and has a refractive index of 1.38. The refractive index difference between the first film layer 31 and the second film layer 32 is 0.97-10.2.

In summary:

In the present invention, by using inorganic non-metallic materials for both the first film layer and the second film layer, a small number of layers can achieve higher reflectivity, so that the overall material thickness is small, the flexibility is good, and the inorganic non-metallic materials dissipate heat good.

In the utility model, by setting the refractive index of the first film layer to be greater than the refractive index of the second film layer, the refractive index difference between the layers is 0.05-2, so that after the light is incident, it passes through the refraction and reflection of each interface, and the reflectivity of the reflected light is greatly Increase and present a wide area of reflected light, making the optical stealth material have high reflectivity and a wide reflection area, so that the observer can observe the reflected light of the surrounding environment in a larger range, thereby well concealing the original appearance of the cover .

In the utility model, a transparent protective layer is provided to effectively improve the abrasion resistance, water resistance, weather resistance and ultraviolet radiation resistance of the optical material.

In the utility model, by providing a pressure-sensitive adhesive layer and a release paper layer on one side of the pressure-sensitive adhesive layer, the covering that needs to be concealed can be attached to the covering target, and the release paper layer and the pressure-sensitive adhesive layer can be peeled off during use. Touch the cover that needs to be concealed and stick it on the surface of the cover.

The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the various technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, All should be considered as the scope of this specification.

The above-mentioned embodiments only express a few implementation modes of the utility model, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the utility model patent. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the utility model, several modifications and improvements can be made, and these all fall within the protection scope of the utility model. Therefore, the scope of protection of the utility model patent should be subject to the appended claims.

Claims

An ultra-thin optical stealth material for attaching to and bonding with the target to be covered, characterized in that it includes at least a plurality of first film layers and a plurality of second film layers, so The refractive index of the first film layer is greater than the refractive index of the second film layer, and a plurality of the first film layers and a plurality of the second film layers are alternately stacked, and the outermost side far from the target to be covered is The first film layer; the first film layer and the second film layer are both inorganic non-metallic material film layers.
The ultra-thin optical stealth material according to claim 1, wherein the refractive index difference between the first film layer and the second film layer is 0.05-2.
The ultra-thin optical stealth material according to claim 1, wherein the refractive index of the first film layer is greater than 2, and the refractive index of the second film layer is less than 2.
The ultra-thin optical stealth material according to claim 1, wherein the material of the first film layer is zinc sulfide or titanium dioxide or niobium pentoxide; the material of the second film layer is magnesium fluoride or two Silicon oxide or aluminum fluoride or aluminum oxide.
The ultra-thin optical stealth material according to claim 1, wherein a plurality of the first film layers have the same material, or at least two of the first film layers have different materials.
The ultra-thin optical stealth material according to claim 1, wherein a plurality of the second film layers have the same material, or at least two of the first film layers have different materials.
The ultra-thin optical stealth material of claim 1, wherein the ultra-thin optical stealth material further comprises a transparent protective layer, and the transparent protective layer is located away from the first film layer of the target to be covered. Outside.
8. The ultra-thin optical stealth material according to claim 7, wherein the material of the transparent protective layer is a transparent resin coating or a film layer.
The ultra-thin optical stealth material according to claim 1, wherein the ultra-thin optical stealth material further comprises a bearing layer, and the bearing layer is located close to the first film layer or the second film layer covering the target. The outside of the film.
The ultra-thin optical stealth material of claim 1, wherein the ultra-thin optical stealth layer further comprises a pressure-sensitive adhesive layer, which is close to the first film layer or the second film layer covering the target. On the outside, a release paper layer is arranged on one side of the pressure-sensitive adhesive layer.