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Anti-electromagnetic interference tube shell electromagnetic shielding layer of image intensifier and preparation method of anti-electromagnetic interference tube shell electromagnetic shielding layer

An electromagnetic shielding layer, anti-electromagnetic interference technology, applied in the direction of magnetic field/electric field shielding, cathode ray/electron beam tube shell/container, discharge tube, etc. Input the earth and be easily affected by external radiation, etc., to achieve the effect of improving electromagnetic shielding, easy to control thickness, and improving electrical conductivity

Active Publication Date: 2021-06-01
NORTH NIGHT VISION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the continuous development of high and new technology, electromagnetic interference such as strong electromagnetic environment or specific strong electromagnetic pulse signals will appear continuously, which will cause abnormal phenomena of flickering, extinguishing and bright lights of the image intensifier, which will seriously affect the observation and use. Therefore, the electromagnetic shielding efficiency It has gradually become an important factor to ensure the stability of the low-light image intensifier
In 2019, an electromagnetic compatibility design method for a low-light image intensifier: 201910714998.4 was proposed. This patent was designed from the electromagnetic compatibility of the high-voltage power supply, image intensifier tube, and shell, but it did not systematically evaluate the plastic shell of the image intensifier. Research on the preparation method and performance of electromagnetic shielding layer for electromagnetic interference
[0004] The current image intensifier casing is generally made of thin-walled, light-weight, insulating and high-voltage-resistant plastics, which have no electromagnetic shielding effect, and the casing cannot be directly input to the ground. It is easy to interfere with external radiation and cause the RE102 test to exceed the standard. At the same time, it is also easily affected by external radiation, resulting in Abnormal work occurred during RS103 test
In addition, the weldability of the plastic casing of the image intensifier is not good, and the power wire can only be drawn out from the casing, which has a certain impact on the assembly of the image intensifier and the subsequent whole tube

Method used

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  • Anti-electromagnetic interference tube shell electromagnetic shielding layer of image intensifier and preparation method of anti-electromagnetic interference tube shell electromagnetic shielding layer
  • Anti-electromagnetic interference tube shell electromagnetic shielding layer of image intensifier and preparation method of anti-electromagnetic interference tube shell electromagnetic shielding layer

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Embodiment 1

[0039] Provided is an electromagnetic shielding layer of a shell for anti-electromagnetic interference of an image intensifier and a preparation method thereof, specifically comprising the following steps:

[0040] (1) Ultrasonic clean the shell of the image intensifier in 3% neutral detergent for at least 5 minutes, then rinse it in running tap water for 5 minutes, then rinse it in running deionized water for 10 minutes, and then place it in a 40°C refrigerator. Dry in an oven for 8 hours. After the drying is completed, take out the shell and weigh 2.62g, and the thickness is 0.8mm.

[0041] (2) Use a spray gun with a diameter of 0.5mm and an air pressure of 0.4mpa to spray copper conductive paint on the outer surface of the cleaned shell. After spraying, place the shell in an oven at 45°C to dry for 7 hours. After drying, take out the shell and weigh it It is 2.73g and the thickness is 0.93mm.

[0042] (3) Weigh the raw materials according to 15g / L copper sulfate pentahydra...

Embodiment 2

[0047] Provided is an electromagnetic shielding layer of a shell for anti-electromagnetic interference of an image intensifier and a preparation method thereof, specifically comprising the following steps:

[0048] (1) Ultrasonic clean the shell of the image intensifier in 5% neutral detergent for at least 5 minutes, then rinse it in flowing tap water for 5 minutes, then rinse it in flowing deionized water for 10 minutes, and then place it in a 45°C refrigerator. Dry in an oven for 6 hours. After the drying is completed, take out the shell and weigh 2.65g, and the thickness is 0.86mm.

[0049] (2) Use a spray gun with a caliber of 0.8mm and an air pressure of 0.5mpa to spray silver-copper conductive paint on the outer surface of the cleaned shell. After spraying, place the shell in an oven at 50°C to dry for 4 hours. After drying, take out the shell and weigh it The weight is 2.79g and the thickness is 1.05mm.

[0050] (3) Weigh the raw materials according to 25g / L copper sul...

Embodiment 3

[0055] Provided is an electromagnetic shielding layer of a shell for anti-electromagnetic interference of an image intensifier and a preparation method thereof, specifically comprising the following steps:

[0056] (1) Ultrasonic clean the shell of the image intensifier in 4% neutral detergent for at least 5 minutes, then rinse it in flowing tap water for 5 minutes, then rinse it in flowing deionized water for 10 minutes, and then place it in a 50°C refrigerator. Dry in an oven for 4 hours. After the drying is completed, take out the shell and weigh 2.63g, and the thickness is 0.83mm.

[0057] (2) Use a spray gun with a caliber of 0.6mm and an air pressure of 0.6mpa to spray nickel conductive paint on the outer surface of the cleaned shell. After spraying, place the shell in an oven at 50°C to dry for 4 hours. After drying, take out the shell and weigh it It is 2.75g and the thickness is 0.96mm.

[0058] (3) Weigh the raw materials according to 20g / L copper sulfate pentahydra...

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Abstract

The invention discloses an anti-electromagnetic interference shell electromagnetic shielding layer of an image intensifier and a preparation method of the anti-electromagnetic interference shell electromagnetic shielding layer. The electromagnetic shielding layer is a composite metal layer which is sequentially composed of a conductive paint layer, an electroplating copper layer and a chemical tin plating layer from inside to outside. The method comprises the following steps: a) cleaning and drying an image intensifier shell; b) spraying conductive paint on the outer surface of the shell by a spray gun and carrying out drying; c) preparing a copper plating solution; d) putting a magnetic stirrer and a shell into the solution prepared in the step c), heating the solution, carrying out electroplating on the shell, taking out the shell from the solution after electroplating for a certain time, cleaning the shell with deionized water, and drying the shell; e) preparing a chemical tin plating solution; and f) putting the shell into the solution prepared in the step e), heating the solution for plating for a certain time, taking out the shell from the solution, cleaning the shell with deionized water, and drying the shell to prepare the electromagnetic shielding layer of the shell of the image intensifier. The prepared shell electromagnetic screen has good adhesiveness and electromagnetic shielding performance.

Description

technical field [0001] The invention relates to the technical field of low-light image intensifiers, in particular to an electromagnetic shielding layer of an image intensifier housing against electromagnetic interference and a preparation method thereof. Background technique [0002] In the field of low-light night vision technology, the low-light image intensifier is the core device of the low-light night vision device. In the traditional sense, the main factor affecting the working stability of the image intensifier is the incident light intensity, which requires the image intensifier to be able to adapt to 10 -4 ~10 4 lx has an even wider light range, and it is required to be able to image clearly in harsh environments with strong flashes. [0003] The emergence of automatic gating high-voltage power supply technology has greatly improved the dynamic range and service life of the image intensifier, and at the same time solved the problem of the image intensifier imagin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J29/86H01J29/00H01J9/24H01J31/50H05K9/00
CPCH01J31/50H01J29/003H01J29/863H01J29/867H01J9/24H05K9/0088Y02A30/00
Inventor 曾进能杨琼连苏德坦褚祝军杜培德朱文锦赵恒李廷涛周盛涛邱永生
Owner NORTH NIGHT VISION TECH
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