Laser eavesdropping blocking type protective film

Abstract

The utility model discloses a laser eavesdropping blocking type protective film which comprises a base film layer, an absorbing layer is arranged above the base film layer, a reflecting layer is arranged on one side, far away from the base film layer, of the absorbing layer, a wear-resistant layer is arranged on one side, far away from the absorbing layer, of the reflecting layer, and a bonding layer is arranged on one side, far away from the absorbing layer, of the base film layer. A protective layer is arranged on the side, away from the base film layer, of the bonding layer, the reflecting layer comprises a nanometer oxidation film layer, an aluminum foil layer is arranged in the nanometer oxidation film layer, and a plurality of reinforcing strips distributed at equal intervals are arranged on the side, close to the absorbing layer, of the aluminum foil layer. The protective film is simple in structure, convenient to paste and good in wear resistance, can effectively reflect and absorb laser, and guarantees the effectiveness of laser blocking.

Description

Technical Field

[0001] The utility model relates to the technical field of laser protective films, in particular to a laser eavesdropping blocking type protective film. Background Art

[0002] A laser eavesdropper is a device that monitors conversations by shining a laser beam on the glass of a room and receiving a feedback signal. The monitoring range can reach up to 1000 meters. With the development of laser technology, laser eavesdropping technology has evolved from the earliest forward-flyback laser eavesdropping that required alignment to a current technology that allows eavesdropping on conversations in a room simply by shining the laser on vibrating objects in the room, such as clothing, paper, cups, curtains, etc., making personal privacy and trade secrets ineffectively protected. Currently, the common method of preventing laser eavesdropping is to install a laser eavesdropping blocking device on the glass of a room to block laser eavesdropping. However, such devices are generally expensive and inconvenient to use. To address this, we have proposed a laser eavesdropping blocking protective film. Utility Model Content

[0003] To address the above-mentioned issues, the present invention provides a laser eavesdropping blocking protective film. This solves the problem that the current common method of preventing laser eavesdropping is to install a laser eavesdropping blocking device on the glass of the room to block laser eavesdropping, but such a device is generally expensive and inconvenient to use.

[0004] The utility model provides a laser eavesdropping blocking protective film, comprising a base film layer, an absorption layer provided above the base film layer, a reflection layer provided on the side of the absorption layer away from the base film layer, a wear-resistant layer provided on the side of the reflection layer away from the absorption layer, an adhesive layer provided on the side of the base film layer away from the absorption layer, a protective layer provided on the side of the adhesive layer away from the base film layer, the reflection layer comprising a nano-oxide film layer, an aluminum foil layer provided in the nano-oxide film layer, and a plurality of equidistantly arranged reinforcement strips provided on the side of the aluminum foil layer close to the absorption layer.

[0005] In the above solution, the base film layer is an infrared light absorbing film.

[0006] In the above solution, the absorption layer is a nano-aluminum oxide layer.

[0007] In the above solution, the wear-resistant layer is a PET film layer.

[0008] In the above solution, the protective layer is a release paper layer.

[0009] In the above solution, the cross-section of the aluminum foil layer is wavy.

[0010] The advantages and beneficial effects of the present invention are as follows: The present invention provides a laser eavesdropping-blocking protective film. When a laser eavesdropper emits a laser into a room, the laser is emitted to the surface of the reflective layer. The aluminum foil layer provided within the nano-oxide film layer can reflect the laser at irregular angles, preventing the laser eavesdropper from receiving the reflected laser signal, thereby achieving the purpose of laser eavesdropping blocking. The reinforcing strip effectively increases the overall structural strength of the aluminum foil layer, reducing the probability of deformation of the aluminum foil layer. The wear-resistant layer increases the wear resistance of the protective film. The provision of the adhesive layer allows the protective film to be directly adhered to the glass. This protective film has a simple structure, is easy to adhere, has good wear resistance, can effectively reflect and absorb laser light, and ensures the effectiveness of laser blocking. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0012] Figure 1 It is a cross-sectional view of the utility model;

[0013] Figure 2 This is a cross-sectional view of the reflective layer of the present invention.

[0014] In the figure: 1, base film layer 2, absorption layer 3, reflection layer 31, nano-oxide film layer

[0015] 32. Aluminum foil layer 33. Reinforcement strip 4. Wear-resistant layer 5. Adhesive layer

[0016] 6. Protective layer. DETAILED DESCRIPTION

[0017] The following embodiments are used to further describe the specific embodiments of the present invention in conjunction with the accompanying drawings and examples. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention.

[0018] like Figure 1-2As shown, the utility model is a laser eavesdropping blocking protective film, comprising a base film layer 1, an absorption layer 2 is provided above the base film layer 1, a reflective layer 3 is provided on the side of the absorption layer 2 away from the base film layer 1, a wear-resistant layer 4 is provided on the side of the reflective layer 3 away from the absorption layer 2, and the wear-resistant layer 4 increases the wear resistance of the protective film, the base film layer 1 is provided with an adhesive layer 5 on the side away from the absorption layer 2, and the setting of the adhesive layer 5 enables the protective film to be directly adhered to the glass, the adhesive layer 5 is provided with a protective layer 6 on the side away from the base film layer 1, the reflective layer 3 includes a nano-oxide film layer 31, the An aluminum foil layer 32 is provided within the nano-oxide film layer 31. The aluminum foil layer 32 is provided with a plurality of equally spaced reinforcement strips 33 on the side close to the absorption layer 2. When a laser eavesdropper emits a laser into the room, the laser is emitted onto the surface of the reflective layer 3. The aluminum foil layer 32 provided within the nano-oxide film layer 31 can reflect the laser at irregular angles, so that the laser eavesdropper cannot receive the reflected laser signal, thereby achieving the purpose of laser eavesdropping. The reinforcement strips 33 effectively increase the overall structural strength of the aluminum foil layer 32 and reduce the probability of deformation of the aluminum foil layer 32.

[0019] The base film layer 1 is an infrared light absorbing film.

[0020] The absorption layer 2 is a nano-aluminum oxide layer. Nano-aluminum oxide can be used to absorb laser infrared rays. When the detection laser enters the window, it is absorbed and blocked by 99.99%. The remaining 0.01% of the laser light enters the room and is diffusely reflected by indoor objects, and then attempts to be guided out through the window. However, due to the presence of this infrared light absorption film, the guided diffusely reflected light is blocked by 99.99% by this laser protection film, and the material of the infrared light absorption film has a certain light transmittance.

[0021] The wear-resistant layer 4 is a PET film layer.

[0022] The protective layer 6 is a release paper layer.

[0023] The cross section of the aluminum foil layer 32 is wavy.

[0024] Specifically, in the present invention, when a laser eavesdropper emits a laser into a room, the laser is emitted to the surface of the reflective layer 3. The aluminum foil layer 32 provided in the nano-oxide film layer 31 can reflect the laser at irregular angles, so that the laser eavesdropper cannot receive the reflected laser signal, thereby achieving the purpose of laser eavesdropping blocking. The reinforcing strip 33 effectively increases the overall structural strength of the aluminum foil layer 32 and reduces the probability of deformation of the aluminum foil layer 32. Nano-aluminum oxide can be used to absorb laser infrared rays. When the detection laser enters the window, it is absorbed and blocked by 99.99%. The remaining 0.01% of the laser light enters the room and is diffusely reflected by objects in the room, and then attempts to be guided out through the window. However, due to the presence of this infrared light absorption film, the guided diffusely reflected light is blocked by 99.99% by this laser protection film. In addition, the material of the infrared light absorption film has a certain degree of light transmittance. The wear-resistant layer 4 increases the wear resistance of the protection film. The setting of the adhesive layer 5 allows the protection film to be directly adhered to the glass.

[0025] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A laser eavesdropping blocking protective film, comprising a base film layer (1), characterized in that: An absorption layer (2) is provided above the base film layer (1); a reflection layer (3) is provided on the side of the absorption layer (2) away from the base film layer (1); a wear-resistant layer (4) is provided on the side of the reflection layer (3) away from the absorption layer (2); an adhesive layer (5) is provided on the side of the base film layer (1) away from the absorption layer (2); a protective layer (6) is provided on the side of the adhesive layer (5) away from the base film layer (1); the reflection layer (3) includes a nano-oxide film layer (31); an aluminum foil layer (32) is provided in the nano-oxide film layer (31); and a plurality of equally spaced reinforcement strips (33) are provided on the side of the aluminum foil layer (32) close to the absorption layer (2).

2. The laser eavesdropping blocking protective film according to claim 1, characterized in that: The base film layer (1) is an infrared light absorbing film.

3. The laser eavesdropping blocking protective film according to claim 1, characterized in that: The absorption layer (2) is a nano-aluminum oxide layer.

4. The laser eavesdropping blocking protective film according to claim 1, characterized in that: The wear-resistant layer (4) is a PET film layer.

5. The laser eavesdropping blocking protective film according to claim 1, characterized in that: The protective layer (6) is a release paper layer.

6. The laser eavesdropping blocking protective film according to claim 1, characterized in that: The cross section of the aluminum foil layer (32) is wavy.

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