阅读说明：本技术 一种轻质双波段透明装甲及其制备方法 (Light double-waveband transparent armor and preparation method thereof ) 是由 吴点宇 王腾 张贵恩 孙继伟 马志梅 吕德涛 许晓丽 常志广 马富花 董建阳 张 于 2020-05-13 设计创作，主要内容包括：本发明涉及透明装甲领域,具体涉及一种轻质双波段透明装甲及其制备方法。包括迎弹面、缓冲层和防飞溅层,所述迎弹面采用镁铝尖晶石陶瓷为基材,缓冲层包括两层硼硅酸玻璃,防飞溅层采用聚碳酸酯-PC材料为基材,所述迎弹面与缓冲层之间、两层硼硅酸玻璃之间、缓冲层与防飞溅层之间分别通过粘接材料连接,所述迎弹面与缓冲层之间、缓冲层的两层硼硅酸玻璃之间的粘接材料为聚乙烯醇缩丁醛-PVB,缓冲层与防飞溅层之间的粘接材料为聚氨酯-PU,粘接材料通过真空热复合工艺粘接两侧基材,所述迎弹面与防飞溅层的外表面分别镀制有双波段增透膜,所述双波段增透膜由TiO2和SiO2作为高、低折射率材料复合构成。本发明还提供了一种轻质双波段透明装甲的制备方法。(The invention relates to the field of transparent armors, in particular to a light double-waveband transparent armor and a preparation method thereof. Including meeting bullet face, buffer layer and the layer of preventing splashing, the bullet face adopts magnesium aluminate spinel pottery to be the substrate, and the buffer layer includes two-layer borosilicate glass, and the layer of preventing splashing adopts the polycarbonate-PC material to be the substrate, between meeting bullet face and the buffer layer, between two-layer borosilicate glass, be connected through bonding material between buffer layer and the layer of preventing splashing respectively, the bonding material between meeting bullet face and the buffer layer, between two-layer borosilicate glass of buffer layer is polyvinyl butyral-PVB, and the bonding material between buffer layer and the layer of preventing splashing is polyurethane-PU, and bonding material passes through vacuum thermal compound technology bonding both sides substrate, the surface of meeting bullet face and the layer of preventing splashing has plated the dual band antireflection coating respectively, the dual band antireflection coating comprises as high, low refractive index material complex by TiO2 and SiO 2. The invention also provides a preparation method of the light double-waveband transparent armor.)

1. A light dual-band transparent armor, characterized in that: comprises a bullet-facing surface (1) and a buffer layer(2) And an anti-splashing layer (3), wherein the bullet-facing surface (1) adopts magnesium aluminate spinel ceramic as a substrate, the buffer layer (2) comprises two layers of borosilicate glass, the anti-splashing layer (3) adopts polycarbonate-PC material as the substrate, the bullet-facing surface (1) and the buffer layer (2), the two layers of borosilicate glass and the buffer layer (2) and the anti-splashing layer (3) are respectively connected through bonding materials, the bonding materials between the bullet-facing surface (1) and the buffer layer (2) and between the two layers of borosilicate glass of the buffer layer (2) are polyvinyl butyral-PVB, the bonding materials between the buffer layer (2) and the anti-splashing layer (3) are polyurethane-PU, the bonding materials bond the two side substrates through a vacuum thermal composite process, and the outer surfaces of the bullet-facing surface (1) and the anti-splashing layer (3) are respectively plated with a dual-band antireflection film, the dual-waveband antireflection film is made of TiO₂And SiO₂The material is composed of high and low refractive index materials.

2. The method of claim 1, comprising the steps of:

s1, cleaning the substrate, and cleaning and wiping the substrate before film coating;

s2, increasing the permeability of the bullet-facing surface, and plating a dual-waveband antireflection film on the outer surface of the magnesia-alumina spinel ceramic;

s3, anti-reflection of the anti-splashing layer, and plating a double-waveband anti-reflection film on the outer surface of the polycarbonate-PC;

s4, adjusting the structure, and placing the bullet-facing surface, the buffer layer and the anti-splashing layer in sequence;

s5, molding and preparing, wherein the light transparent armor is prepared by adopting a vacuum high-pressure thermal composite molding process;

and S6, cutting into specific different shapes according to the requirements.

3. The method of claim 2, wherein the step of S2 is as follows:

the magnesium aluminate spinel ceramic substrate is suspended and fixed by adopting a vacuum coating process and is vacuumized when the vacuum degree reaches3～4×10^-3When Pa is needed, the heating filament is turned on to heat the substrate to 100 ℃, after the substrate is kept at the constant temperature for 1 hour, the electron gun is started, and TiO with high refractive index is alternately evaporated at the speed of 0.1nm/s and 0.25nm/s respectively₂And low refractive index SiO₂Plating the two materials for 10min and 8min respectively to plate the composite anti-reflection film for 2 periods.

4. The method of claim 2, wherein the step of S3 is as follows:

adopting a magnetron sputtering coating process, fixing the polycarbonate-PC and starting to vacuumize until the vacuum degree reaches 1-2 × 10^{- 4}When Pa, argon is filled to 0.55Pa, the substrate is heated to 85 ℃, and high-refractive-index TiO is sputtered alternately at the speed of 0.1nm/s and 0.25nm/s by adopting 1500W power₂And low refractive index SiO₂The plating time of the two materials is 7min and 3min respectively, and the composite anti-reflection film with 2 periods is plated.

5. The method of claim 2, wherein the step of S4 is as follows: the magnesium aluminate spinel ceramic after anti-reflection treatment, the borosilicate glass of the two layers and the polycarbonate-PC after anti-reflection treatment are sequentially placed and fixed in position to form the basic structure of the light double-waveband transparent armor.

6. The method of claim 2, wherein the step of S5 is as follows:

the light dual-waveband transparent armor is prepared by adopting a vacuum high-pressure thermal composite forming process, the spinel-borosilicate glass laminated structure is prepared by adopting a PVB vacuum high-pressure thermal composite process curve, and the borosilicate glass-PC laminated structure is prepared by adopting a PU vacuum high-pressure thermal composite process curve.

7. The method of claim 2, wherein the method comprises the steps of: the bullet-facing surface is made of dual-waveband anti-reflection magnesium aluminate spinel ceramic with the thickness of 8.5 mm.

8. The method of claim 2, wherein the method comprises the steps of: the buffer layer is made of 7.5mm thick two-layer two-waveband high-transmittance Schottky Borofloat33 borosilicate glass.

9. The method of claim 2, wherein the method comprises the steps of: the splash-proof layer adopts Sabik HLG5 polycarbonate-PC with the thickness of 4.5 mm.

10. The method of claim 2, wherein the method comprises the steps of: the bonding material between the bullet-facing surface and the buffer layer is accumulated polyvinyl butyral-PVB polymer with the total thickness of 1.52mm, the bonding material between two layers of borosilicate glass of the buffer layer is accumulated polyvinyl butyral-PVB polymer with the total thickness of 2.28mm, and the bonding material between the buffer layer and the anti-splashing layer is H-6LV polyurethane-PU polymer of a new material with the total thickness of 1.8 mm.

Technical Field

The invention relates to the field of transparent armors, in particular to a light double-waveband transparent armor and a preparation method thereof.

Background

Under the complex combat environment, the armored vehicle becomes a target for enemy firepower to attack preferentially due to the combat importance and the large overall size of the observing and detecting system of the armored vehicle. Therefore, when guaranteeing armoured vehicle operation environment situation perception ability, need to improve the bullet resistance ability of observing and aiming detection system urgently, see and aim at the armoured vehicle and aim at detection system optical window and add transparent armor promptly, have optics transparency promptly, bullet prevention, the armor that shell piece and rock fragment assaulted, in order to improve armoured vehicle's viability, the glass of the observation and aiming window of current armoured vehicle has thickness big, the heavy defect of quality, can not guarantee technical performance and the maneuvering ability of vehicle, and inside operating personnel's space has been compressed, the printing opacity effect is also relatively poor simultaneously

Therefore, it is necessary to solve the above problems.

Disclosure of Invention

Aiming at the bottleneck problems of large thickness (more than or equal to 100 mm), high surface density (about 185 kg/m 2) and low visible light and 1064nm laser light transmittance (less than or equal to 60%) of the traditional bulletproof glass meeting the STANAG3 protection standard, the invention provides a light-weight dual-band transparent armor and a preparation method thereof, carries out bulletproof structure and optical anti-reflection film design on the transparent armor, adopts ceramics with high strength, high hardness and high visible light and near infrared band transmittance as armor bullet-facing surfaces, plates the anti-reflection film on the armor surface and carries out vacuum thermal composite forming process to solve the problems of high light transmittance, light weight and anti-elasticity compatibility of window parts of armored vehicles, ensures that the transparent armor has the structural characteristics of light weight and ultrathin structure, increases the space in the vehicle and meets the development requirement of light weight of armored vehicles, the technical scheme adopted by the invention is as follows:

the utility model provides a light dual-waveband transparent armor, includes bullet face, buffer layer and the layer of preventing splashing, bullet face adopts magnesium aluminate spinel pottery to be the substrate, and the buffer layer includes two-layer borosilicate glass, and the layer of preventing splashing adopts the polycarbonate-PC material to be the substrate, bullet face and buffer layer between, between two-layer borosilicate glass, the buffer layer is connected through bonding material respectively with preventing splashing between the layer, between bullet face and the buffer layer, bonding material between two-layer borosilicate glass of buffer layer are polyvinyl butyral-PVB, and bonding material between buffer layer and the layer of preventing splashing is polyurethane-PU, and bonding material passes through vacuum heat composite technology bonding both sides substrate, bullet face and the surface on layer of preventing splashing have plated the dual-waveband antireflection coating respectively, the dual-waveband antireflection coating is by TiO₂And SiO₂The material is composed of high and low refractive index materials.

A preparation method of a light-weight dual-waveband transparent armor comprises the following steps:

and S1, cleaning the base material, and cleaning and wiping the base material before film coating.

S2, increasing the permeability of the bullet-facing surface, and plating a dual-waveband antireflection film on the outer surface of the magnesia-alumina spinel ceramic;

s3, anti-reflection of the anti-splashing layer, and plating a double-waveband anti-reflection film on the outer surface of the polycarbonate-PC;

s4, adjusting the structure, and placing the bullet-facing surface, the buffer layer and the anti-splashing layer in sequence;

s5, molding and preparing, wherein the light transparent armor is prepared by adopting a vacuum high-pressure thermal composite molding process.

And S6, cutting into specific different shapes according to the requirements.

Further, the specific step of S2 is:

the preparation method comprises the steps of adopting a vacuum coating process, suspending and fixing a magnesium aluminate spinel ceramic substrate, starting vacuumizing, starting a heating filament to heat the substrate to 100 ℃ when the vacuum degree reaches 3-4 x 10 < -3 > Pa, keeping the temperature for 1h, starting an electron gun, alternately evaporating two materials of TiO2 with a high refractive index and SiO2 with a low refractive index at the rates of 0.1nm/s and 0.25nm/s respectively, wherein the coating time is 10min and 8min respectively, and coating the composite anti-reflection film for 2 periods.

Further, the specific step of S3 is:

fixing polycarbonate-PC and vacuumizing by adopting a magnetron sputtering coating process, filling argon to 0.55Pa when the vacuum degree reaches 1-2 multiplied by 10 < -4 > Pa, heating the substrate to 85 ℃, alternately sputtering two materials of TiO2 with high refractive index and SiO2 with low refractive index at the rates of 0.1nm/s and 0.25nm/s by adopting 1500W power for 7min and 3min respectively, and coating the composite anti-reflection film for 2 periods.

Further, the specific step of S4 is:

the magnesium aluminate spinel ceramic after anti-reflection treatment, the borosilicate glass of the two layers and the polycarbonate-PC after anti-reflection treatment are sequentially placed and fixed in position to form the basic structure of the light double-waveband transparent armor.

Further, the specific step of S5 is:

the light dual-waveband transparent armor is prepared by adopting a vacuum high-pressure thermal composite forming process, the spinel-borosilicate glass laminated structure is prepared by adopting a PVB vacuum high-pressure thermal composite process curve, and the borosilicate glass-PC laminated structure is prepared by adopting a PU vacuum high-pressure thermal composite process curve.

Preferably, the bullet-facing surface is made of 8.5 mm-thick dual-waveband anti-reflection magnesium aluminate spinel ceramic.

Preferably, the buffer layer is made of two layers of 7.5mm thick two-band high-transmittance Schottky Borofloat33 borosilicate glass.

Preferably, the splash-proof layer adopts Sabik HLG5 polycarbonate-PC with the thickness of 4.5 mm.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the invention, through effective matching among the structures of each layer, 53-type 7.62mm armor piercing bullets can be prevented at a normal angle of 0 degree and at a distance of 100m, the thickness of the light transparent armor is reduced to 30mm on the basis of meeting the STANAG 3-level protection standard, the thickness of the armor is greatly reduced compared with the armor with the thickness of more than 100mm in the prior art, and the space in the vehicle is effectively expanded.

2. The invention provides a novel structure of transparent armor, and the areal density of the transparent armor can reach 70 kg/m²Compared with the prior art, the surface density water average is 185 kg/m²The traditional bulletproof glass has the advantage of obvious light weight, obviously improves the maneuvering performance of the armored vehicle,

3. according to the invention, the permeability of visible light or 1064nm laser is at least 85% by performing anti-reflection treatment on the base materials of the bulletproof surface and the anti-splashing layer, so that the problem that the light transmittance is lower than 60% in the prior art is effectively solved.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of a bulletproof surface coating structure;

FIG. 3 is a schematic view of a structure of a coating film of the anti-spattering layer;

FIG. 4 is a graph showing the results of a simulation of the reflectance of Borofloat33 borosilicate glass;

FIG. 5 is a diagram of a PC reflectivity simulation result;

FIG. 6 is a graph showing the simulation result of the reflectivity of spinel ceramic;

FIG. 7 is a diagram of a simulation result of transparent armor transmittance optimization;

FIG. 8 is a graph of a PVB vacuum thermal compounding process;

FIG. 9 is a diagram showing a vacuum high-pressure thermal compounding process of PU;

in the figure: 1 is a bulletproof surface, 2 is a buffer layer, and 3 is an anti-splashing layer.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 3, the invention provides a light dual-band transparent armor, which comprises an elastic surface 1, a buffer layer 2 and an anti-splash layer 3, wherein the elastic surface 1 adopts magnesia-alumina spinel ceramic as a substrate, the buffer layer 2 comprises two layers of borosilicate glass, the anti-splash layer 3 adopts polycarbonate-PC material as the substrate, the elastic surface 1 and the buffer layer 2, the two layers of borosilicate glass and the buffer layer 2 and the anti-splash layer 3 are respectively connected through bonding materials, the bonding materials between the elastic surface 1 and the buffer layer 2 and between the two layers of borosilicate glass of the buffer layer 2 are polyvinyl butyral-PVB, the bonding materials between the buffer layer 2 and the anti-splash layer 3 are polyurethane-PU, the bonding materials are bonded with the substrates on two sides through a vacuum thermal composite process, and the outer surfaces of the elastic surface 1 and the anti-splash layer 3 are respectively plated with dual-band antireflection films, the dual-waveband antireflection film is made of TiO₂And SiO₂The material is composed of high and low refractive index materials.

The invention also provides a preparation method of the light double-waveband transparent armor,

a preparation method of a light-weight dual-waveband transparent armor comprises the following steps:

and S1, cleaning the base material, and cleaning and wiping the base material before film coating.

S2, increasing the permeability of the bullet-facing surface, and plating a dual-waveband antireflection film on the outer surface of the magnesia-alumina spinel ceramic;

s3, anti-reflection of the anti-splashing layer, and plating a double-waveband anti-reflection film on the outer surface of the polycarbonate-PC;

s4, adjusting the structure, and placing the bullet-facing surface, the buffer layer and the anti-splashing layer in sequence;

s5, molding and preparing, wherein the light transparent armor is prepared by adopting a vacuum high-pressure thermal composite molding process.

And S6, cutting into specific different shapes according to the requirements.

Further, the specific step of S2 is:

the preparation method comprises the steps of adopting a vacuum coating process, suspending and fixing a magnesium aluminate spinel ceramic substrate, starting vacuumizing, starting a heating filament to heat the substrate to 100 ℃ when the vacuum degree reaches 3-4 x 10 < -3 > Pa, keeping the temperature for 1h, starting an electron gun, alternately evaporating two materials of TiO2 with a high refractive index and SiO2 with a low refractive index at the rates of 0.1nm/s and 0.25nm/s respectively, wherein the coating time is 10min and 8min respectively, and coating the composite anti-reflection film for 2 periods.

Further, the specific step of S3 is:

fixing polycarbonate-PC and vacuumizing by adopting a magnetron sputtering coating process, filling argon to 0.55Pa when the vacuum degree reaches 1-2 multiplied by 10 < -4 > Pa, heating the substrate to 85 ℃, alternately sputtering two materials of TiO2 with high refractive index and SiO2 with low refractive index at the rates of 0.1nm/s and 0.25nm/s by adopting 1500W power for 7min and 3min respectively, and coating the composite anti-reflection film for 2 periods.

Further, the specific step of S4 is:

the magnesium aluminate spinel ceramic after anti-reflection treatment, the borosilicate glass of the two layers and the polycarbonate-PC after anti-reflection treatment are sequentially placed and fixed in position to form the basic structure of the light double-waveband transparent armor.

Further, the specific step of S5 is:

the light dual-waveband transparent armor is prepared by adopting a vacuum high-pressure thermal composite forming process, the spinel-borosilicate glass laminated structure is prepared by adopting a PVB vacuum high-pressure thermal composite process curve, and the borosilicate glass-PC laminated structure is prepared by adopting a PU vacuum high-pressure thermal composite process curve.

Preferably, the bullet-facing surface is made of 8.5 mm-thick dual-waveband anti-reflection magnesium aluminate spinel ceramic.

Preferably, the buffer layer is made of two layers of 7.5mm thick two-band high-transmittance Schottky Borofloat33 borosilicate glass.

Preferably, the splash-proof layer adopts Sabik HLG5 polycarbonate-PC with the thickness of 4.5 mm.

The principle involved in the design of the ballistic structure of the invention is:

the transparent armor material comprises a bullet-facing surface, a buffer layer and a three-layer structure functional layer of a splash-proof layer, wherein a polymer bonding layer is adopted in the middle of the three-layer structure for compounding, and the transparent armor material comprises:

bullet-facing surface

At present, three ceramics, namely sapphire, magnesia-alumina spinel and aluminum oxynitride, have the characteristics of high strength, high hardness, good linear transmittance (over 80%) in ultraviolet, visible light and near infrared bands, and the like, and transparent ceramics are adopted to replace the traditional toughened glass to serve as a bullet-facing surface, so that the penetration depth of a bullet can be greatly reduced, energy consumption is reduced, the energy consumption requirement on buffer layer materials is reduced, the bullet-facing surface and the thickness of the buffer layer can be reduced, the purposes of light weight and weight reduction are achieved, and the preparation method is suitable for preparing the infrared/visible light transparent armor.

By studying the relationship between the areal density and the bullet penetration residual speed of three transparent ceramic materials under the same shooting condition (53 formula 7.62mm API, the shooting speed of 840 +/-15 m/s) and the same buffering and anti-splashing conditions, the anti-elasticity performance of three ceramics of sapphire, magnesia-alumina spinel and aluminum oxynitride is sequentially improved. Due to the limitation of powder and a preparation process, the maximum ceramic size of the domestic aluminum oxynitride ceramic is not larger than 120mm, and the size requirement of a window of an observing, aiming and detecting system cannot be met. Compared with sapphire, the magnesia-alumina spinel ceramic has the advantages of low density (3.57-3.58 g/cm 3), low cost and the like. Therefore, the magnesium aluminate spinel ceramic is adopted as the bullet-facing surface of the transparent armor.

In addition, under the condition of meeting the anti-elastic performance, by researching the relation between the thickness of the ceramic and the surface density, the armor surface density is gradually reduced along with the increase of the thickness of the ceramic, and finally the armor surface density tends to be horizontally stabilized under a certain specific surface density condition. Therefore, the thickness of the bullet-facing surface of the magnesia-alumina spinel can be increased to reduce the overall surface density of the armor and realize light weight.

Buffer layer

The bullet head is pressed and cracked in the process of penetrating the transparent armor to the bullet surface of the armor-piercing bullet, and a conical cracking area is formed around the impact point. Although the high hardness characteristic of ceramics can generate larger reaction force to the warhead, and reduce the speed of the warhead. However, the buffer material is still required to dissipate the residual energy of the armor-piercing projectile. The buffer material needs to have the characteristics of low density, high strength, visible and infrared high light transmittance and the like so as to realize the performances of dual-waveband light transmission, weight reduction, bullet resistance and the like, and the table 1 shows the detailed performance of the buffer material for the transparent armor

TABLE 1 cushioning Material for transparent armor

As shown in Table 1, the Schottky Borofloat33 borosilicate glass has excellent light transmittance, the thickness and the weight can be reduced by 12-15%, and the index requirement of light weight reduction is realized. In addition, borosilicate glass compares in other materials, because the characteristic of high strength, has ensured transparent armoured ballistic resistance ability and reliability, is applicable to the buffer layer in this patent.

Anti-spattering layer

During penetration of armor-piercing projectiles through the transparent armor buffer layer, the buffer layer material absorbs the remaining energy and is broken, and back layer fragments of the armor-piercing projectiles can splash. The transparent armor is usually added with a polymer as a splash-proof layer on a back plate of a buffer layer, and the polymer can provide protection for operators and instruments and equipment on the back of the transparent armor due to the high-strength and high-toughness characteristics of the polymer.

The common polymer anti-splash surface is made of acrylic-PMMA and polycarbonate-PC materials. The toughness of PC is related to its backbone molecular motion, which continues when impacted by high linking forces, effectively dissipating the impact force. PMMA has much lower ability to absorb impact energy than PC. In addition, the PC has excellent optical properties and good impact resistance in a low-temperature environment. Therefore, the patent adopts polycarbonate-PC as the splash-proof surface material.

Adhesive layer

In consideration of the adhesive strength between functional layers, new environmental stability, interlayer optical matching (specifically, see 2 and dual-waveband anti-reflection design) and the like, two polymer adhesive materials of polyvinyl butyral-PVB and polyurethane-PU are selected to respectively carry out vacuum thermal composite adhesive treatment on spinel ceramic-Borofloat 33-Borofloat33 and Borofloat33-PC laminated structures.

The principle involved in the design of the dual-waveband anti-reflection structure of the invention is as follows:

in order to enhance the overall light transmittance of the transparent armor in this patent, the light reflection loss, i.e., the reflectivity, of light occurring at each dielectric face is reduced. Therefore, by integrating other indexes, the transparent armor bullet-facing surface, the buffer layer, the anti-splashing and the bonding material should be made of materials with relatively close refractive indexes as far as possible so as to reduce the reflection loss of light between the functional layers in the materials, such as the refractive index of magnesia-alumina spinel (Mg-Al spinel) 1.75-1.79, the refractive index of Schottky Borofloat33 borosilicate glass 1.47, the refractive index of type-selected PC (polycarbonate) 1.74, the refractive index of PVB (polyvinyl butyral) film 1.48 and the refractive index of PU film 1.76. The layers of spinel ceramic-Borofloat 33-Borofloat33 are laminated and bonded by PVB with the refractive index of 1.48, the refractive index of Borofloat33 is nearly consistent with that of the PVB, so the PVB-Borofloat33-PVB-Borofloat3 can be regarded as an integral optical material; similarly, the layers of Borofloat33-PC are bonded together by laminating with PU having a refractive index of 1.76, and the PU-PC can be regarded as an integral optical material.

The light reflection loss of the transparent armor material mainly occurs among air-spinel ceramic, spinel ceramic-Borofloat 33-PC and PC-air, the reflectivity of each loss interface is calculated through analog simulation, and support is provided for visible light and 1064nm laser dual-band anti-reflection design of the transparent armor.

Fig. 4 shows the reflectivity of the simulated Borofloat33 borosilicate glass, the incident medium is PC, the emergent medium is spinel ceramic, and it can be seen from the figure that the reflectivity of the two interfaces is small, only 0.4% -0.6%, and can be ignored.

Fig. 5 shows the simulated PC reflectivity, where the incident and exit media are air and Borofloat33 borosilicate glass, respectively, and it can be seen that the PC interface reflectivity is high, about 5%, and the loss of light during propagation is relatively severe.

Fig. 6 is a simulation of the reflectivity of spinel ceramic, i.e. the incident medium Borofloat33 borosilicate glass and the emergent medium air, and it can be seen from the figure that the reflectivity of the spinel interface is very high, reaching about 9%, and the light loss is serious in the transmission process.

Therefore, the main work of the visible light and 1064nm laser dual-band anti-reflection of the transparent armor structure in the patent is to design an anti-reflection film system and prepare a film layer on the outer surfaces of a bullet-facing surface and a PC surface. The design of the antireflection film system is mainly completed by TFC optical film design software, TiO2 and SiO2 are selected as high-refractive-index and low-refractive-index materials, and the number of layers and the reflectivity of the film are optimized through the design. Plating a dual-waveband antireflection film on the outer surface of the bullet-facing surface spinel ceramic in a vacuum coating mode; considering the temperature resistance of the PC material, the influence of high temperature on the material caused by vacuum evaporation is avoided, and a dual-waveband antireflection film is plated on the outer surface of the PC material in a magnetron sputtering film plating mode.

Fig. 7 is a simulation result of the transparent armor after dual-band antireflection, and it can be seen from the figure that the reflectivity can be reduced from 14% -15% to 2% -4% after the antireflection film system is designed and optimized.

The principle involved in the vacuum high-pressure thermal composite forming process of the invention is as follows:

the light transparent armor is prepared by adopting a vacuum high-pressure thermal composite forming process, the spinel-borosilicate glass laminated structure is prepared by adopting a PVB vacuum high-pressure thermal composite process curve, and the spinel-borosilicate glass-PC laminated structure is prepared by adopting a PU vacuum high-pressure thermal composite process curve. Wherein, fig. 8 is a vacuum high-pressure thermal composite process curve of a spinel-borosilicate glass laminated structure, and fig. 9 is a vacuum high-pressure thermal composite process curve of a spinel-optical glass-PC laminated structure.

Although only the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art, and all changes are encompassed in the scope of the present invention.