CN110095022A - A kind of economic benefits and social benefits answer infrared stealth structure - Google Patents

Abstract

The invention relates to a double-effect infrared stealth structure, comprising a base layer, a resonant cavity is arranged in the base layer, a vacuum cavity layer is set above the resonant cavity, and an outer protective layer is set above the vacuum cavity layer; The double-effect infrared stealth structure is set. The vacuum cavity can prevent the diffusion of heat, and the heat radiation can be prevented by setting the resonant cavity, so that the equipment can be isolated from infrared in two aspects, so that the equipment can realize the infrared stealth function.

Description

A dual-effect infrared stealth structure

technical field

The invention belongs to the technical field of infrared detection, and in particular relates to a double-effect infrared stealth structure.

Background technique

With the rapid development of electronic information technology and its wide application in the military field, the means of military reconnaissance have achieved high-tech. In the situation where battlefield targets are "hit when found", the advent of infrared imagers has made the once effective visible light and radar stealth technologies face the threat of being cracked. When the atmospheric conditions are good, the airborne infrared search and track system can detect the target at a distance of more than 80km. Therefore, on the basis of visible light and radar band stealth, taking into account infrared is an inevitable trend in the development of full-band stealth technology in the future.

In recent years, the high-precision, intelligent and diversified development of infrared detection methods has posed higher challenges to infrared stealth technology. As a military anti-reconnaissance technology, infrared stealth technology mainly achieves low detectability of targets by suppressing the thermal radiation of targets in the infrared atmospheric window band (3-5μm and 8-14μm). At present, the stealth of infrared detection is mainly achieved by reducing or changing the infrared radiation characteristics of the target by means of cooling, shielding, occlusion, and stealth coatings. Among them, coating low-emissivity materials on the target surface is the most widely used. However, low-emissivity infrared stealth coatings have a series of problems such as heat accumulation, limited frequency range, and short service life. Therefore, it is urgent to explore and develop high-performance infrared stealth materials and technologies.

Contents of the invention

The object of the present invention is to provide a double-effect infrared stealth structure, including a base layer, a resonant cavity is arranged inside the base layer, a vacuum cavity layer is set above the resonant cavity, and an outer cavity layer is set above the vacuum cavity layer. The protective layer.

The resonant cavity includes a first metal layer, a filling layer, and a second metal layer, the second metal layer is disposed above the base layer, the first metal layer is disposed below the vacuum chamber layer, and the first metal layer and the second The gaps between the metal layers are filled with filling layers.

The second metal layer includes a plurality of metal strips arranged periodically.

The distance between the metal strips is 50-60nm.

The pitch of the metal strips is 60nm.

The vacuum chamber layer is provided with multi-layer vacuum chambers.

The base layer is made of polymethyl methacrylate.

The distance between the first metal layer and the second metal layer is 80nm.

The outer protective layer is made of metal.

Beneficial effects of the present invention: the double-effect infrared stealth structure provided by the present invention is provided through setting. The vacuum cavity layer can prevent the diffusion of heat, and the heat radiation can be prevented by setting the resonant cavity, which can make the incident infrared light resonate in the cavity, enhance the absorption of light, and the absorbed light can be converted faster and more In this way, the device is isolated from infrared from two aspects, so that the device can realize the infrared stealth function.

The present invention will be described in further detail below in conjunction with the accompanying drawings.

Description of drawings

Figure 1 is a schematic diagram of a dual-effect infrared stealth structure.

Fig. 2 is the second schematic diagram of the double-effect infrared stealth structure.

In the figure: 1. Base layer; 2. Resonant cavity; 3. Vacuum cavity layer; 4. Outer protective layer; 5. First metal layer; 6. Second metal layer; 7. Filling layer.

Detailed ways

In order to further illustrate the technical means and effects adopted by the present invention to achieve the intended purpose, the specific implementation, structural features and effects of the present invention will be described in detail below in conjunction with the accompanying drawings and examples.

Example 1

This embodiment provides a double-effect infrared stealth structure as shown in Figure 1, including a base layer 1, a resonant cavity 2 is arranged in the base layer 1, and the thermal radiation effect can be isolated through the resonant cavity 2, so that the thermal radiation Can not be propagated; the top of the resonant cavity 2 is provided with a vacuum cavity layer 3, through which the heat transmission effect can be isolated, and the top of the vacuum cavity layer 3 is provided with an outer protective layer 4, the outer protective layer mainly It is used to protect the stealth structure. It can be made of metal or other materials. It can be selected according to the actual working environment of the infrared stealth structure. For example, it can be made of waterproof materials when working underwater. The work can be made of high temperature resistant materials.

Further, the resonant cavity 2 includes a first metal layer 5, a filling layer 7, and a second metal layer 6, the second metal layer 6 is arranged above the base layer 1, and the first metal layer 5 is arranged on the vacuum cavity layer 3, the first metal layer 5 is spaced from the second metal layer 6, and the gap between the first metal layer 5 and the second metal layer 6 is filled with a filling layer 7, so that a Fabry-Perot cavity can be formed , when the infrared light is incident from the lower net, it can form a resonance in the Fabry-Perot cavity, thereby generating more heat.

Further, the first metal layer 5 and the second metal layer 6 are made of gold, silver, copper and the like.

Further, the second metal layer 6 includes a plurality of metal strips arranged periodically, and the distance between the metal strips is 50-60 nm, preferably, 50 nm, 55 nm, 60 nm, etc. can be selected.

Further, the distance between the first metal layer 5 and the second metal layer 6 is 80 nm, which can improve the efficiency of infrared light resonance.

Further, the base layer 1 is made of polymethyl methacrylate (PMMA), PMMA has high mechanical strength, so it can play a good supporting role, and the light transmittance of PMMA is high, which can reach 92%. Above, in this way, more infrared light enters the resonant cavity so as to work and avoid leakage of infrared light, thereby forming a better infrared stealth effect.

Further, the vacuum cavity layer 3 can be made of aluminum oxide in a vacuum environment. It can also be made of porous materials to seal holes in a vacuum environment to form a vacuum chamber.

Example 2

This embodiment provides a double-effect infrared stealth structure as shown in Figure 2, including a base layer 1, a resonant cavity 2 is arranged in the base layer 1, and the thermal radiation effect can be isolated through the resonant cavity 2, so that thermal radiation cannot be propagated; a vacuum cavity layer 3 is provided above the resonant cavity 2, and the vacuum cavity layer 3 is provided with a multi-layer vacuum cavity. The vacuum chamber shown in Figure 2 is provided with 3 layers; the heat transmission effect can be better insulated through the vacuum chamber layer 3, and an outer protective layer 4 is arranged above the vacuum chamber layer 3, and the outer protective layer is mainly used to protect The stealth structure can be made of metal or other materials. It can be selected according to the actual working environment of the infrared stealth structure. Made of high temperature material.

Further, the resonant cavity 2 includes a first metal layer 5, a filling layer 7, and a second metal layer 6, the second metal layer 6 is arranged above the base layer 1, and the first metal layer 5 is arranged on the vacuum cavity layer 3, the first metal layer 5 is spaced from the second metal layer 6, and the gap between the first metal layer 5 and the second metal layer 6 is filled with a filling layer 7, so that a Fabry-Perot cavity can be formed , when the infrared light is incident from the lower net, it can form a resonance in the Fabry-Perot cavity, thereby generating more heat.

Further, the second metal layer 6 includes a plurality of metal strips arranged periodically, and the distance between the metal strips is 50-60 nm, preferably, 50 nm, 55 nm, 60 nm, etc. can be selected.

Further, the distance between the first metal layer 5 and the second metal layer 6 is 80 nm, which can improve the efficiency of infrared light resonance.

Further, the base layer 1 is made of polymethyl methacrylate (PMMA), PMMA has high mechanical strength, so it can play a good supporting role, and the light transmittance of PMMA is high, which can reach 92%. Above, in this way, more infrared light enters the resonant cavity so as to work and avoid leakage of infrared light, thereby forming a better infrared stealth effect.

In summary, the double-effect infrared stealth structure is set. The vacuum cavity layer 3 can prevent the diffusion of heat, and the heat radiation can be prevented by setting the resonant resonator 2, which can make the incident infrared light form a resonance in the resonant cavity 2, enhance the absorption of light, and the absorbed light can be faster and more efficient. Much of it is converted into heat energy; in this way, the infrared isolation of the device is carried out from two aspects, so that the device can realize the infrared stealth function.

The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be assumed that the specific implementation of the present invention is limited to these descriptions. For those of ordinary skill in the technical field of the present invention, without departing from the concept of the present invention, some simple deduction or replacement can be made, which should be regarded as belonging to the protection scope of the present invention.

Claims (9)

1. A double-effect infrared stealth structure, characterized in that: it includes a base layer (1), a resonant cavity (2) is provided in the base layer (1), and a vacuum cavity is provided above the resonant cavity (2) layer (3), and an outer protective layer (4) is arranged above the vacuum chamber layer (3). 2. A double-effect infrared stealth structure according to claim 1, characterized in that: the resonant cavity (2) comprises a first metal layer (5), a filling layer (7), a second metal layer (6) , the second metal layer (6) is disposed above the base layer (1), the first metal layer (5) is disposed below the vacuum cavity layer (3), the first metal layer (5) and the second metal layer The gaps between (6) are filled with a filling layer (7). 3. The double-effect infrared stealth structure according to claim 2, characterized in that: the second metal layer (6) comprises a plurality of metal strips arranged periodically. 4 . The double-effect infrared stealth structure according to claim 3 , wherein the distance between the metal strips is 50-60 nm. 5. A double-effect infrared stealth structure as claimed in claim 4, characterized in that: the distance between the metal strips is 60nm. 6. The double-effect infrared stealth structure according to claim 1, characterized in that: the vacuum chamber layer (3) is provided with multi-layer vacuum chambers. 7. The double-effect infrared stealth structure according to claim 1, characterized in that: the base layer (1) is made of polymethyl methacrylate. 8. The double-effect infrared stealth structure according to claim 2, characterized in that the distance between the first metal layer (5) and the second metal layer (6) is 80 nm. 9. The double-effect infrared stealth structure according to claim 8, characterized in that: the outer protective layer (4) is made of metal.