WO2021164325A1

WO2021164325A1 - Optical stealth material

Info

Publication number: WO2021164325A1
Application number: PCT/CN2020/126797
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: 2020-02-17
Filing date: 2020-11-05
Publication date: 2021-08-26
Also published as: CN211570534U

Abstract

The present application relates to an optical stealth material, which is used for being attached to a target object to be covered. The optical stealth material at least comprises several first film layers and several second film layers, wherein the refractive index of the first film layers is larger than the refractive index of the second film layers, the several first film layers and the several second film layers are alternately arranged in a superposed manner, and the outermost side far away from the target object to be covered is the first film layer; and the first film layers are inorganic non-metal material film layers, and the second film layers are organic film layers. The first film layers and the second film layers, which first film layers and second film layers have different refractive indexes, are alternately superposed to form the optical stealth material, such that when natural light is incident to the optical stealth material, light rays are refracted and reflected by each interface to form wide-area reflected light rays, and an observer can thus observe the reflected light rays of the surrounding environment in a large range, such that the original appearance of the target object to be covered is concealed; and the first film layers are inorganic non-metal material film layers, and have a large refractive index, high reflectivity, thin thickness, good flexibility, low production cost and good heat dissipation effect.

Description

An optical stealth material

This application claims the priority of the Chinese patent application whose application date is February 17, 2020 and the application number is 202020176701.1, the entire content of which is incorporated into this application by reference.

Technical field

The utility model relates to an 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 title.

Utility model content

The purpose of the present invention is to provide an optical stealth material, which can fit the target to be covered and conceal the original shape of the covered target, has a small thickness, good flexibility, and high signal transmission efficiency.

In order to achieve the above objectives, the present invention provides the following technical solutions: an optical stealth material for attaching to and bonding with the target to be covered, including at least a number of first film layers and a number of A second film layer, the refractive index of the first film layer is greater than the refractive index of the second film layer; The outermost side of the object to be covered is a first film layer; the first film layer is an inorganic non-metallic material film layer, and the second film layer is an organic film layer.

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

Further, the materials of the plurality of second film layers are the same, or the materials of at least two of the second film layers are different.

Further, the inorganic non-metallic material film layer is a high refractive index inorganic non-metallic material film layer.

Further, the material of the high refractive index inorganic non-metallic material film layer is zinc sulfide, titanium dioxide or niobium pentoxide.

Further, the organic film layer is a flexible film layer, and the flexible film layer includes a flexible film or a transparent resin coating or a combination of a flexible film and a transparent resin coating.

Further, the material of the organic film layer is any one of polycarbonate, polyethylene terephthalate and polymethyl methacrylate.

Further, the optical stealth material further includes a transparent protective layer disposed on the outer side of the first film layer away from the target to be covered.

Further, the optical stealth material further includes a pressure-sensitive adhesive layer disposed on the outer side of the first film layer or the second film layer close to the target to be covered.

Further, the optical stealth material further includes a release paper layer arranged on one side of the pressure-sensitive adhesive layer.

The beneficial effect of the utility model is that the first film layer and the second film layer with different refractive indexes are alternately stacked to form an optical stealth material, so that when natural light enters the optical stealth material, the light passes through the refraction and reflection of each interface , The reflectivity of the reflected light is greatly increased, and it is a wide area of reflected light, so that the observer can observe the reflected light of the surrounding environment in a larger range, thereby concealing the original appearance of the target to be covered;

The first film layer is an inorganic non-metallic material film layer, and the second film layer is an organic film layer. The inorganic non-metallic material film layer has a high refractive index and a small thickness. It is alternately stacked with the second organic film layer to make an optical stealth material The overall reflectivity is high, the texture is light and thin, the flexibility is good, the signal transmission efficiency is high, the signal shielding is small, and it is suitable for a variety of occasions where the original shape needs to be concealed, especially in the communication field;

The use of inorganic non-metallic material film layer also has good thermal conductivity, so that the optical stealth material has a good heat dissipation effect.

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.

Fig. 3 is a test diagram of reflectivity of the optical stealth material in the first embodiment.

4 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.

Please refer to FIG. 1, the optical stealth material of the present invention is used to attach to and fit the target to be covered. Specifically, the optical stealth material can be formed with the target to be covered. The same shape as the object. The target to be covered may be a communication element, etc., which is not specifically limited here, and depends on actual conditions. The optical stealth material includes at least a plurality of first film layers 10 and a plurality of second film layers 20, and a plurality of the first film layers 10 and a plurality of the second film layers 20 are alternately superimposed and arranged away from the The outermost side of the target to be covered is the first film layer 10, and the side close to the target to be covered may be the first film layer 10 or the second film layer 20. That is, the number of the first film layer 10 and the second film layer 20 can be the same. For example, the first film layer 10 has 4 layers, and the second film layer 20 has 4 layers. It is not specifically limited here. At this time, it is far away from the target to be covered. The outermost of is the first film layer 10, and the side closest to the target to be covered is the second film layer 20. It can also be that the number of the first film layer 10 is one more than the number of the second film layer 20, for example, the first film layer has 5 layers and the second film layer has 4 layers; or the first film layer has 3 layers and the second film layer has 4 layers. There are two 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 10, and the side closest to the target to be covered is also the first film layer 10. The refractive index of the first film layer 10 is greater than the refractive index of the second film layer 20, and the purpose of this setting is: when natural light enters the optical stealth material, the light is refracted and reflected by each interface, and the reflected light is reflected. The rate is greatly increased, and the reflected light is in a wide area, so that the observer can observe the reflected light of the surrounding environment in a larger range, thereby concealing the original appearance of the target to be covered.

The first film layer 10 is an inorganic non-metallic material film layer, the inorganic non-metallic material film layer 10 is a high refractive index inorganic non-metallic material film layer, and the material of the high refractive index inorganic non-metallic material film layer 10 is Inorganic non-metallic materials such as zinc sulfide or titanium dioxide or niobium pentoxide, zinc sulfide, titanium dioxide and niobium pentoxide have excellent thermal conductivity, so they can improve the heat dissipation effect. It is true that in other embodiments, the material of the first film layer 10 may also be other, which depends on the actual situation and is not specifically limited here. The second film layer 20 is an organic film layer, the organic film layer 20 is a flexible film layer, and the material of the flexible film layer 20 is polycarbonate (PC), polyethylene terephthalate (PET) ) And polymethyl methacrylate (PMMA), preferably a transparent mirror-surface flexible film. It is true that in other embodiments, the material of the second film layer 20 may also be other, which depends on the actual situation and is not specifically limited here. The flexible film layer 20 includes a flexible film or a transparent resin coating or a combination of a flexible film and a transparent resin coating, depending on actual conditions. The materials of a plurality of the first film layers 10 are the same, or the materials of at least two of the first film layers 10 are different; the materials of a plurality of the second film layers 20 are the same, or at least two layers of the second film The material of layer 20 is different. That is, when the number of the first film layer 10 is two or more, the material of each first film layer 10 may be the same or not completely the same or completely different; when the number of the second film layer 20 is two or two When there are more than one layer, the material of each second film layer 20 may be the same or not completely the same or completely different.

In order to improve the wear resistance, water resistance, weather resistance and ultraviolet radiation resistance of the optical stealth material, the optical stealth material further includes a transparent protective layer 30 disposed on the outer side of the first film layer 10 . The optical stealth material further includes a pressure-sensitive adhesive layer 40, the pressure-sensitive adhesive layer 40 is arranged on the outer side of the first film layer 10, and the optical stealth material further includes a pressure-sensitive adhesive layer 40 arranged on one side of the pressure-sensitive adhesive layer 40.的release paper layer 50. When the optical stealth material is provided with a transparent protective layer 30, a pressure-sensitive adhesive layer 40, and a release paper layer 50 at the same time, the transparent protective layer 30 is provided on the outside of one of the first film layers 10, and the pressure-sensitive adhesive The layer 40 and the release paper layer 50 are arranged outside the other first film layer 10. When the optical stealth material is used, the release paper layer 50 is peeled off to make the pressure-sensitive adhesive layer 40 adhere to the target to be covered.

Several specific embodiments are described below.

Example one:

Referring to FIG. 2, in this embodiment, the first film layer 11 is provided with 5 layers, the second film layer 12 is provided with 4 layers, and the first film layer 11 and the second film layer 12 are alternately stacked. And the first film layer 11 is arranged on the outermost side. The first film layer 11 is an inorganic non-metallic material film layer, and the second film layer 12 is a flexible film layer. In this embodiment, the material of the inorganic non-metal material film layer 11 is titanium dioxide, and its refractive index is 2.35; the material of the flexible film layer 12 is PMMA, its refractive index is 1.48, and the difference in refractive index between layers is 0.87. The overall reflectance of the optical stealth material in the visible light band is about 70% (when the angle of incidence is 8°), please refer to Figure 3. Figure 3 is the reflection spectrum of the optical stealth material in this embodiment, and its signal transmission rate is greater than 90 %.

Embodiment two:

4, in this embodiment, the first film layer 21 is provided with 4 layers, the second film layer 22 is provided with 3 layers, and the first film layer 21 and the second film layer 22 are alternately stacked And the first film layer 21 is arranged on the outermost side. The first film layer 21 is an inorganic non-metallic material film layer, and the second film layer 22 is a flexible film layer. At the same time, the optical stealth material in this embodiment also includes a pressure-sensitive adhesive layer 24, a release paper layer 25, and a transparent protective layer 23. The transparent protective layer 23 is arranged above the optical stealth material, which is specifically a transparent resin coating; The sensitive adhesive layer 24 and the release paper layer 25 are arranged under the optical stealth material. Part of the inorganic non-metallic material film layer 21 is made of titanium dioxide, and its refractive index is 2.35, and the material of the remaining part of the inorganic non-metallic material film layer 21 is zinc sulfide, and its refractive index is 2.4. Part of the flexible film layer 22 is made of transparent mirror PET with a refractive index of 1.65, and the remaining part of the flexible film layer 22 is made of transparent resin with a refractive index of 1.5.

To sum up: the optical stealth material is formed by alternately superposing the first film layer and the second film layer with different refractive indexes, so that when natural light enters the optical stealth material, the light passes through the refraction and reflection of each interface, reflecting the light The reflectivity is greatly increased, and the reflected light is in a wide area, so that the observer can observe the reflected light of the surrounding environment in a larger range, thereby concealing the original appearance of the target to be covered;

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 several implementation modes of the present utility model, and their description is relatively specific and detailed, but they should not be understood as a limitation on the scope of utility model patents. 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 optical stealth material, which is used to attach to and adhere to a target to be covered, and is characterized in that it includes at least a plurality of first film layers and a plurality of second film layers. The refractive index of a 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 away from the target to be covered is The first film layer; the first film layer is an inorganic non-metallic material film layer, and the second film layer is an organic film layer.
The optical stealth material of claim 1, wherein the materials of a plurality of the first film layers are the same, or the materials of at least two of the first film layers are different.
The optical stealth material of claim 1, wherein the materials of a plurality of the second film layers are the same, or the materials of at least two of the second film layers are different.
3. The optical stealth material of claim 1, wherein the inorganic non-metallic material film layer is a high refractive index inorganic non-metallic material film layer.
The optical stealth material of claim 4, wherein the material of the high refractive index inorganic non-metallic material film layer is zinc sulfide, titanium dioxide, or niobium pentoxide.
The optical stealth material of claim 1, wherein the organic film layer is a flexible film layer, and the flexible film layer comprises a flexible film or a transparent resin coating or a combination of a flexible film and a transparent resin coating.
3. The optical stealth material of claim 1, wherein the organic film layer is made of any one of polycarbonate, polyethylene terephthalate, and polymethyl methacrylate.
3. The optical stealth material of claim 1, wherein the optical stealth material further comprises a transparent protective layer, the transparent protective layer being arranged on the outer side of the first film layer away from the target to be covered.
The optical stealth material according to claim 1, wherein the optical stealth material further comprises a pressure-sensitive adhesive layer, and the pressure-sensitive adhesive layer is disposed on the first film layer or near the object to be covered. The outside of the second film layer.
9. The optical camouflage material of claim 9, wherein the optical camouflage material further comprises a release paper layer disposed on one side of the pressure-sensitive adhesive layer.