Copper-silver alloy, copper-silver alloy plated optical fiber, optical fiber panel and preparation method and application of copper-silver alloy plated optical fiber and optical fiber panel

Abstract

The invention discloses a copper-silver alloy, a copper-silver alloy plated optical fiber, an optical fiber panel and a preparation method and application of the copper-silver alloy plated optical fiber. The sum of the content of copper and the content of silver in the copper-silver alloy is larger than or equal to 99.995 wt%, and the content of silver ranges from 92 wt% to 95 wt%. The technical problem to be solved is that optical fiber monofilaments plated with copper-silver alloy layers are used for preparing the optical fiber panel, so that the optical crosstalk resistance and the electromagnetic interference resistance of the prepared optical fiber panel are remarkably improved, and high-resolution image transmission of the optical fiber panel with optical crosstalk resistance and high-frequency electromagnetic pulse resistance is realized.

Description

Technical Field

[0001] The invention belongs to the technical field of ICCD / ICOMS coupling imaging element preparation, and in particular relates to a copper-silver alloy, a copper-silver alloy-plated optical fiber, an optical fiber panel, and a preparation method and application thereof. Background Art

[0002] The fiber optic panel is a fiber array image transmission material made of tens of thousands of optical fibers melted and pressed at high temperature. It has the characteristics of high light transmission efficiency, small inter-stage coupling loss, clear and true image transmission, and zero thickness. When the fiber optic panel works in a strong electromagnetic field environment, electromagnetic radiation has a certain impact on the accuracy and stability of image transmission, causing errors in the measurement data, and high-frequency electromagnetic pulses can even directly damage optical devices such as cameras.

[0003] At present, in the process of optical signal transmission in traditional fiber optic panels, due to the close arrangement of optical fibers, optical signals will cause crosstalk between adjacent optical fibers. This crosstalk effect will cause optical signals to leak into other channels, affecting the communication quality. Especially in long-distance transmission, crosstalk between cores is the main factor restricting transmission efficiency. How to effectively reduce crosstalk between optical fibers and effectively improve the quality and efficiency of optical fiber communication is a technical problem that needs to be solved urgently in fiber optic panels. Summary of the invention

[0004] In view of this, the main purpose of the present invention is to provide a copper-silver alloy, a copper-silver alloy-plated optical fiber, an optical fiber panel, and a preparation method and application thereof. The technical problem to be solved is to use an optical fiber monofilament plated with a copper-silver alloy layer for the preparation of an optical fiber panel, so that the anti-light crosstalk and anti-electromagnetic interference capabilities of the prepared optical panel are significantly improved, thereby achieving high-resolution imaging of the optical fiber panel that is anti-light crosstalk and resistant to high-frequency electromagnetic pulses.

[0005] The purpose of the present invention and the technical problem to be solved are achieved by adopting the following technical solutions. The present invention proposes a copper-silver alloy, in which the sum of the copper and silver contents in the copper-silver alloy is ≥ 99.995wt% by weight, and the silver content is 92wt% to 95wt%.

[0006] The purpose of the present invention and the technical problems to be solved can be further achieved by adopting the following technical measures.

[0007] Preferably, the aforementioned copper-silver alloy, wherein the oxygen content in the copper-silver alloy is <5ppm, the sum of the contents of iron, nickel, sulfur and phosphorus is ≤8ppm, and the sum of the contents of other impurities is ≤6ppm.

[0008] The purpose of the present invention and the technical problem to be solved are achieved by adopting the following technical solutions. A method for preparing a copper-silver alloy proposed by the present invention comprises the following steps:

[0009] The alloy composition and the corresponding proportion are determined according to the sum of the copper and silver contents in the copper-silver alloy being ≥99.995wt% and the silver content being 92wt% to 95wt%; the corresponding single metal material is selected as the raw material, the metal raw material is pretreated, and the pretreated metal raw material is heated to 780 to 800°C while stirring until the metal is completely melted and mixed evenly to obtain the copper-silver alloy.

[0010] The purpose of the present invention and the solution to its technical problems can also be achieved by adopting the following technical measures. A method for preparing a copper-silver alloy-plated optical fiber proposed in the present invention comprises the following steps:

[0011] S1 draws the optical fiber preform into optical fiber bare wire;

[0012] S2: coating the surface of the bare optical fiber with a copper-silver alloy to form an optical fiber monofilament with a copper-silver alloy coating, and collecting the optical fiber monofilament to obtain the copper-silver alloy-coated optical fiber.

[0013] The purpose of the present invention and the solution of its technical problems can also be achieved by adopting the following technical measures. The present invention proposes a copper-silver alloy-plated optical fiber, which comprises, from the inside to the outside, an optical fiber core layer, an optical fiber sheath layer and a copper-silver alloy plating layer; in terms of weight percentage, the oxygen content in the copper-silver alloy plating layer is less than 5ppm, the sum of the contents of iron, nickel, sulfur and phosphorus is ≤8ppm, and the sum of the contents of other impurities is ≤6ppm.

[0014] The purpose of the present invention and the solution to its technical problems can also be achieved by adopting the following technical measures. The present invention proposes a high-transmittance, crosstalk-proof and electromagnetic pulse-resistant optical fiber panel, wherein the optical fiber portion includes a plurality of copper-silver alloy-plated optical fibers, and the copper-silver alloy-plated optical fibers are optical fiber core layers, optical fiber sheaths and copper-silver alloy coatings from the inside to the outside, and light-absorbing filaments and interstitial filaments are inserted between different copper-silver alloy-plated optical fibers; in terms of weight percentage, the oxygen content in the copper-silver alloy coating is <5ppm, the sum of the contents of iron, nickel, sulfur and phosphorus is ≤8ppm, and the sum of the contents of other impurities is ≤6ppm.

[0015] The purpose of the present invention and the solution to its technical problems can also be achieved by adopting the following technical measures. The present invention proposes a method for preparing a high-transmittance, crosstalk-proof and electromagnetic pulse-resistant optical fiber panel, comprising the following steps:

[0016] a. Put the leather tube on the core rod to make an optical fiber preform;

[0017] b. melting the optical fiber preform obtained in step a into an optical fiber monofilament, and performing a metal coating process to coat a metal coating on the outer surface to produce a metal-coated optical fiber monofilament;

[0018] c. Drawing the black absorption rod into a light-absorbing monofilament, and arranging the metal-plated optical fiber monofilaments obtained in step b in a hexagonal close-packed manner, and uniformly filling the light-absorbing filaments in the gaps of the metal-plated optical fiber monofilaments to obtain a primary composite rod, and drawing the primary composite rod into a primary fiber filament;

[0019] d. Arranging a plurality of primary fiber filaments in a hexagonal close-packed manner, and inserting a light-absorbing filament into the gaps formed by the hexagonal close-packed arrangement of the plurality of primary fiber filaments according to a certain rule to obtain a primary composite rod; drawing the primary composite rod into a primary multifilament; then regularly cutting the primary multifilament, arranging the hexagonal close-packed filaments and bundling them to obtain a secondary composite rod; drawing the secondary composite rod into a secondary multifilament; then regularly cutting the secondary multifilament, arranging the hexagonal close-packed filaments and bundling them to obtain a secondary multifilament rod;

[0020] e. Drawing the secondary multifilament rod obtained in step d at 658-668° C. to obtain a molten fiber bundle; cutting it to a fixed length and then subjecting it to mechanical cold working to obtain a cylindrical blank; optically finishing and optically polishing the blank to obtain the optical fiber panel with high transmittance, anti-crosstalk and anti-electromagnetic pulse.

[0021] The purpose of the present invention and the technical problems to be solved can be further achieved by adopting the following technical measures.

[0022] Preferably, in the method for preparing the aforementioned high-transmittance, crosstalk-proof and electromagnetic pulse-resistant optical fiber panel, in step a, the refractive index of the leather tube at a wavelength of 532 nm is 1.50-1.51, and the refractive index of the core rod at a wavelength of 532 nm is 1.80-1.81.

[0023] Preferably, in the aforementioned method for preparing a high-transmittance, crosstalk-proof and electromagnetic pulse-resistant optical fiber panel, in step c, the primary composite rod comprises metal-plated fiber monofilaments and light-absorbing filaments; and the black absorption rod is made of glass with an absorption coefficient of greater than 0.95 in the wavelength range of 500 to 600 nm.

[0024] The purpose of the present invention and the solution to its technical problems can also be achieved by adopting the following technical measures: The present invention proposes an image-intensified CCD camera, which includes the above-mentioned high-transmittance, crosstalk-proof and electromagnetic pulse-resistant optical fiber panel.

[0025] The purpose of the present invention and the solution to its technical problems can also be achieved by adopting the following technical measures: The present invention proposes an image-intensified CMOS camera, which includes the above-mentioned high-transmittance, crosstalk-proof and electromagnetic pulse-resistant optical fiber panel.

[0026] Compared with the prior art, the copper-silver alloy, copper-silver alloy-plated optical fiber, optical fiber panel and preparation method and application thereof of the present invention have the following beneficial effects:

[0027] The present invention provides a method for preparing an optical fiber panel with high transmittance, anti-crosstalk and anti-electromagnetic pulse by metal plating on the outer surface of the optical fiber. The optical fiber raw material is directly prepared into an optical fiber filament, and a molten metal coating process is adopted to prepare the metal-plated optical fiber filament, so that a metal coating with a certain thickness is formed on the outer surface of the optical fiber, so that the generation of stray light is reduced when a single optical fiber transmits a signal, and the optical crosstalk of the weaker adjacent optical fiber to the optical fiber during the transmission process is reduced, so as to achieve high transmittance, high precision and high resolution transmission of image signals, improve the absorption capacity and anti-interference ability of the optical fiber panel to high-frequency electromagnetic pulses, maintain the normal operation of the optical fiber panel in a strong magnetic field environment, enhance the stability of the image transmission of the optical fiber panel, thereby ensuring the accuracy and resolution of the signal transmission of the optical fiber panel.

[0028] The present invention uses the optical fiber monofilament plated with the copper-silver alloy layer for the preparation of an optical fiber panel. The prepared optical fiber panel has significantly improved anti-optical crosstalk and anti-electromagnetic interference capabilities, thereby achieving high-resolution imaging of the optical fiber panel that is anti-optical crosstalk and resistant to high-frequency electromagnetic pulses.

[0029] The present invention provides a method for preparing a high-transmittance, anti-crosstalk, and anti-electromagnetic pulse optical fiber panel, which involves applying a metal coating on the outer surface of the optical fiber to prepare a high-transmittance optical fiber panel that can effectively prevent optical crosstalk and resist high-frequency electromagnetic pulses. First, the optical fiber raw material is processed into optical fiber filaments, and then a uniform metal coating with a certain thickness is formed on the outer surface of the optical fiber filament through a molten metal coating process. This process significantly reduces the generation of stray light during signal transmission and reduces the optical crosstalk of adjacent optical fibers to the target optical fiber, thereby achieving high transmittance, high precision and high-resolution transmission of image signals. In addition, the method enhances the absorption and anti-interference ability of the optical fiber panel to high-frequency electromagnetic pulses, ensures the normal operation of the optical fiber panel in a strong magnetic field environment, improves the stability of image transmission, and thus ensures the overall accuracy and resolution of the equipment. The optical fiber panel is prepared using an optical fiber monofilament plated with a copper-silver alloy layer, which significantly improves the panel's anti-optical crosstalk and anti-electromagnetic interference performance, and achieves high-resolution image transmission of an anti-high-frequency electromagnetic pulse optical fiber panel;

[0030] The optical fiber panel with high transmittance, crosstalk prevention and electromagnetic pulse resistance provided by the present invention has a copper-silver alloy coating with a refractive index of 1.28-1.31 at a wavelength of 532nm, a transmittance of 72.48%-72.67% at a wavelength of 532nm, a reflectivity of 87%-89% at a wavelength of 532nm, a conductivity of 98.4-99.0% IACS, and a coating elongation of 30%-31%. The shielding effectiveness can reach 84dB-86dB under a test environment where the radiation intensity of the electromagnetic wave is 10V / m and the radiation frequency test fluctuation range is 80MHz-1GHz, thereby ensuring that the manufactured optical fiber panel has high anti-interference performance.

[0031] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the preferred embodiments of the present invention are described in detail as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of the copper-silver alloy optical fiber preparation system of the present invention;

[0033] Figure 2 It is a cross-sectional schematic diagram of the optical fiber panel with high transmittance, crosstalk prevention and electromagnetic pulse resistance of the present invention;

[0034] Figure 3 The process flow chart of the preparation of the optical fiber panel with high transmittance, crosstalk prevention and electromagnetic pulse resistance of the present invention;

[0035] Figure 4 This is a schematic diagram of the anti-electromagnetic interference principle of the copper-silver alloy coating of the present invention;

[0036] Among them, 1-preform rod; 2-optical fiber former; 3-annealing tube; 4-caliber measuring tube; 5-metal coating device; 6-optical fiber collecting device; 7-filling wire; 8-copper-silver alloy coating; 9-light absorbing wire; 10-optical fiber core layer; 11-optical fiber skin layer; 12-internal absorption wave; 13-electromagnetic pulse incident wave; 14-optical fiber filament; 15-reflection wave; 16-transmission wave; 17-internal multiple reflection wave; 18-copper-silver alloy coating. DETAILED DESCRIPTION

[0037] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the copper-silver alloy, copper-silver alloy-plated optical fiber, optical fiber panel and its preparation method and its specific implementation, structure, characteristics and effects of the present invention are described in detail below in combination with the preferred embodiments. In the following description, different "one embodiment" or "embodiment" does not necessarily refer to the same embodiment. In addition, specific features, structures or characteristics in one or more embodiments may be combined in any suitable form.

[0038] Unless otherwise specified, the materials, reagents, etc. involved below are all commercially available products well known to those skilled in the art; unless otherwise specified, the methods described are all methods known in the art. Unless otherwise defined, the technical terms or scientific terms used should have the usual meanings understood by ordinary technicians in the field to which the present invention belongs. If no specific experimental steps or conditions are specified below, the operations or conditions of the conventional experimental steps described in the literature in the field can be followed.

[0039] Ordinary optical fiber is directly made by heating the optical fiber preform rod in a high-temperature furnace to the softening drawing temperature and drawing it into a single wire. Since the refractive index of the core layer of the manufactured optical fiber is large and the refractive index of the cortex is small, some light is not totally reflected in the core layer during the transmission of the optical signal. After penetrating the core layer and entering the cortex, it will cause crosstalk to the remaining optical fibers, seriously affecting the resolution and clarity of the imaging. At the same time, when working in a strong electromagnetic field environment, electromagnetic radiation has a certain influence on the accuracy and stability of the image transmission, causing errors in the measurement data. High-frequency electromagnetic pulses can even directly damage optical devices such as cameras and panels. Therefore, the structure of the optical fiber needs to be adjusted and designed accordingly, such as Figure 1 A copper-silver alloy-coated optical fiber is shown in FIG. By coating a thin layer of copper-silver alloy on the drawn primary wire, an optical fiber primary wire with a copper-silver alloy coating is obtained. The copper-silver alloy coating can effectively reduce the light transmission of the optical fiber, isolate, discharge, reflect and absorb the electromagnetic pulse energy, and attenuate it to the strength that electronic information equipment can withstand, thereby improving the optical fiber panel's ability to absorb high-level electromagnetic pulses and its anti-interference ability, such as Figure 4 As shown. After the electromagnetic pulse incident wave 13 reaches the copper-silver alloy coating 18, most of it will be reflected by the copper-silver alloy coating 18 to form a reflected wave 15; another part enters the copper-silver alloy coating 18 and is absorbed by the copper-silver alloy coating 18 to form an internal absorption wave 12; of the electromagnetic pulse signal that is not absorbed, a part enters the optical fiber filament 14 to form a transmitted wave 16, and the other part forms an internal multiple reflection wave 17 inside the copper-silver alloy coating 18, which is reflected multiple times in the copper-silver alloy coating 18 and transmitted in the direction of the copper-silver alloy coating 18. The present invention solves the existing problems of optical crosstalk and electromagnetic interference in the structural unit. The optical device made of the optical fiber filament plated with copper-silver alloy can realize high transmittance, high resolution, and high-definition image transmission of the optical device, and can resist high-frequency electromagnetic pulse interference.

[0040] In fact, the common fiber optic panels currently produced in large quantities all rely solely on light-absorbing glass to absorb stray light and improve image resolution. However, in the actual signal transmission process, some stray light is still not absorbed, so the light structure needs to be further adjusted. Since the copper-silver alloy layer is plated on the outside of the optical fiber monofilament, it can largely limit the transmission of light signals from the inside of the optical fiber. When making the optical fiber monofilament, the copper-silver alloy is coated on its outer surface to form a copper-silver alloy coating, which can greatly limit the overflow of light signals and improve transmission efficiency; improve the fiber optic panel's ability to absorb high-level electromagnetic pulses and its anti-interference ability.

[0041] To this end, some embodiments of the present invention provide a copper-silver alloy, in which the sum of the copper and silver contents in the copper-silver alloy is ≥99.995wt% by weight. The low purity of the copper-silver alloy causes uncertain fluctuations in the melting point and softening temperature range of the alloy; and the silver content is 92wt% to 95wt%. When the silver content in the copper-silver alloy is less than 92wt% or greater than 95wt%, the melting point of the alloy will be higher than 780°C if the silver content is too low or too high, then the temperature in the heating furnace is not enough to completely melt the alloy, or increasing the melting temperature will cause the molten alloy in the high temperature state to soften the optical fiber monofilament during the coating, which is not conducive to the preparation of the coated optical fiber; the oxygen content is <5ppm, the sum of the iron, nickel, sulfur and phosphorus contents is ≤8ppm, and the sum of the other impurities is ≤6ppm. The impurity content needs to be controlled in a lower range, and too high a content is not conducive to the stability of the alloy properties. The preferred copper-silver alloy composition is shown in Table 1.

[0042] Table 1

[0043]

[0044] The melting point of the above-mentioned coating metal is 760-780°C, the softening temperature is about 500°C, the conductivity is ≥98.4% IACS, the coating elongation is ≥30%, the coating refractive index is 1.2-1.5, and the reflectivity is about 80-90%. The high conductivity can ensure that the copper-silver alloy coating has good anti-electromagnetic interference ability, and the excellent coating elongation can effectively ensure that the copper-silver alloy coating is uniformly attached to the optical fiber monofilament during the subsequent preparation of the primary and secondary wires to improve the uniformity of the organization.

[0045] Some embodiments of the present invention also provide a method for preparing the copper-silver alloy, comprising the following steps:

[0046] 101. Determine the alloy composition and the corresponding proportion according to the above alloy ratio range; select the corresponding single metal material as the raw material, and accurately weigh the selected single metal to ensure that the proportion of each metal is accurate.

[0047] 102. Perform necessary pretreatment on the metal raw materials to prevent the particles from being too large and remove oil, impurities and moisture, including but not limited to degreasing, drying and cutting. The degreasing, drying and cutting are all selected from the existing technology, and the specific steps are not repeated here.

[0048] 103. Place the pretreated metal raw material into a heating furnace, turn on the heating furnace, and heat the metal raw material to 780-800°C until the metal is completely melted. A temperature below 780°C will result in insufficient melting of the metal raw material, while a temperature above 800°C will soften the optical fiber filaments, affecting the subsequent formation of the optical fiber filament metal coating. During the heating process, stir the molten metal raw material at a speed of 150-300 r / min to ensure that the metal is evenly mixed until the metal is completely dissolved and evenly distributed.

[0049] Some embodiments of the present invention also provide a method for preparing a high-transmittance, crosstalk-proof and electromagnetic pulse-resistant optical fiber panel, wherein the optical fiber panel is made of tens of millions or even hundreds of millions of micron-sized optical fibers coated with metal coatings through a specific process, and the optical fiber is composed of a core, a cladding and an external metal coating, and each fiber independently transmits a pixel from an input end to an output end; Figure 3 As shown, the following steps are included:

[0050] 201, prepare the leather tube and the core rod into an optical fiber preform rod, and draw the optical fiber monofilament.

[0051] The step of preparing the optical fiber monofilament includes: selecting a core rod and a leather tube of suitable size, and sleeve the primary leather tube on the primary core rod, wherein the refractive index of the optical fiber skin layer at a wavelength of 532nm is 1.50-1.51; and the refractive index of the optical fiber core layer at a wavelength of 532nm is 1.80-1.81;

[0052] 202, drawing the optical fiber preform into bare optical fiber.

[0053] The optical fiber preform is heated to 810-820°C in a graphite furnace to fully soften the optical fiber preform. After the preform in the graphite furnace reaches a softened state, it is drawn into an optical fiber monofilament. In order to ensure that the drawn optical fiber monofilament has a high uniformity, the drawing speed is controlled at about 10-14m / min, which has a better effect and the diameter of the drawn optical fiber monofilament is more uniform. Too fast or too slow speed will affect the uniformity of the optical fiber monofilament, and poor uniformity of the monofilament will directly lead to a decrease in the transmittance of the optical fiber panel.

[0054] 203, then, a copper-silver alloy is coated on the surface of the bare optical fiber to form an optical fiber monofilament with a coating metal, and the coated optical fiber monofilament is collected by a fiber collecting device to obtain the copper-silver alloy-coated optical fiber; the copper-silver alloy-coated optical fiber is composed of an optical fiber core layer 10, an optical fiber sheath 11 and a copper-silver alloy coating 8 from the inside to the outside; wherein, the refractive index of the optical fiber sheath 11 at a wavelength of 532nm is 1.50-1.51; the refractive index of the optical fiber core layer 10 at a wavelength of 532nm is 1.80-1.81; the thickness of the copper-silver alloy coating 8 is ≥18μm, the refractive index at a wavelength of 532nm is 1.2-1.5, the reflectivity at a wavelength of 532nm is about 80-90%, and the transmittance at a wavelength of 532nm is 72%-73%.

[0055] Among them, Figure 1 As shown, the copper-silver alloy optical fiber preparation system of the present invention comprises an optical fiber former 2, an annealing tube 3, a diameter measuring tube 4, a metal coating device 5 and an optical fiber collecting device 6 which are arranged in sequence from top to bottom; the preform 1 is fed from directly above the optical fiber former 2 and drawn into an optical fiber single filament of 2.00 to 2.05 mm at 800 to 820° C., and then cooled to room temperature through the annealing tube 3 directly below the optical fiber former 2, and then the diameter is measured and verified through the optical fiber diameter measuring tube 4 directly below the annealing tube 3, and then the optical fiber single filament after cooling and finalization is introduced into the metal coating device 5 for metal coating; after the coating is completed, the optical fiber single filament after coating is collected by the optical fiber collecting device 6 below the metal coating device 5. The specific process of the metal coating is as follows: the copper-silver alloy particles in the metal coating device 5 are heated to above the melting point (the melting point of the alloy is 760-780°C), and then the prepared bare optical fiber (i.e., optical fiber monofilament) is introduced into the metal coating device 5 to start coating the bare optical fiber, and the coating temperature is 780-800°C, so as to form a uniform metal coating on the outside of the optical fiber monofilament, and the thickness of the metal coating is ≥18μm. The 18μm thick metal coating can ensure that the manufactured optical fiber panel has high anti-interference and effectively control the preparation cost of the optical fiber panel. The coated optical fiber filaments are collected by a fiber collection device. The copper-silver alloy coating on the outside of the optical fiber monofilament has a refractive index of 1.2-1.5 at a wavelength of 532nm, a reflectivity of about 80-90% at a wavelength of 532nm, and a transmittance of 72%-73% at a wavelength of 532nm, which can effectively reduce the crosstalk between optical fiber monofilaments. Under the test environment where the radiation intensity of electromagnetic waves is 10V / m and the radiation frequency test fluctuation range is 80MHz~1GHz, the shielding effectiveness can reach 84dB~86dB.

[0056] 204, drawing the black absorption rod into a light absorbing monofilament, and arranging the metal-plated optical fiber monofilaments in a hexagonal close-packed manner, and uniformly filling the light absorbing filaments in the gaps of the metal-plated optical fiber monofilaments to obtain a primary composite rod, and drawing the primary composite rod into a primary fiber filament (hereinafter referred to as primary filament).

[0057] The primary composite rod in this step includes metal-plated fiber monofilaments and light-absorbing fibers. The black absorption rod is made of glass with good light absorption performance, and the absorption coefficient in the 500-600nm band reaches more than 0.95.

[0058] 205, multiple primary wires are arranged in a hexagonal close packing, and light absorbing single wires are inserted into the gaps formed by the multiple primary wires in a hexagonal close packing according to a certain rule. In order to ensure the transmittance of the optical fiber panel, the design is that every two fiber cores use one light absorbing wire together by analogy with the coordination relationship calculation, and then a primary composite rod with a side size of 27 to 30 mm is obtained. The pre-drawn parts are heated and drawn by a high-precision optical fiber forming machine, and the wire diameter drawing accuracy is ≤1μm. The primary composite rod is drawn into a primary multifilament with a side size of 1.2 to 1.5 mm at 760 to 780°C; the primary multifilament is then cut regularly, arranged in a hexagonal close packing and bundled to obtain a secondary composite rod with a side size of 27 to 30 mm; the secondary composite rod is drawn into a secondary multifilament with a side size of 1.2 to 1.5 mm at 760 to 780°C.

[0059] Among them, the primary composite rod and the secondary composite rod are both in a regular hexagonal structure. In the step of bundling multiple monofilaments after hexagonal closest arrangement to obtain a primary composite rod and the step of bundling multiple primary composite wires after hexagonal closest arrangement to obtain a secondary composite rod, it is necessary to regularly cut multiple monofilaments or primary wires and arrange them in a regular hexagonal mold. After the arrangement is completed, bundle them to obtain a primary composite rod or a secondary composite rod. The drawing temperature is 760-785°C. Under these temperature ranges, it can ensure that the optical fiber monofilament, primary multifilament, and secondary multifilament have good ductility, which is convenient for wire drawing and melt pressing; it can also effectively take into account the good ductility of the metal coating, without destroying the layer structure of the metal coating, and the primary multifilament, secondary multifilament, and the optical fiber monofilament coating in the blank also have high uniformity, which can better achieve the isolation of optical crosstalk signals and the absorption of strong electromagnetic interference, and improve the image transmission ability and anti-interference ability of the optical fiber panel.

[0060] 206, after the secondary multifilament is arranged, it is placed in a high-precision fiber forming machine, and drawn at 658-668°C to obtain a molten fiber bundle according to the pixel size and external size requirements of the optical fiber panel. According to the thickness requirements of the panel, it is cut to a fixed length, and then mechanically cold processed to obtain a cylindrical blank.

[0061] Among them, the melting temperature of the secondary multifilament is adjusted to 658-668°C ， Low-temperature melting and pressing within this temperature range can significantly reduce the interlayer structural damage of the metal coating caused by high temperature, while maintaining a high uniformity of the primary multifilament, secondary multifilament and optical fiber monofilament coating in the blank. The uniformity of the structure helps to more effectively isolate the optical crosstalk signal, absorb strong electromagnetic interference, and enhance the imaging transmission performance and anti-interference ability of the optical fiber panel. When the temperature is higher than 668℃, the degree of coating damage will increase, and when the temperature is lower than 658℃, the panel will not be fixed and formed.

[0062] 207. Use a precision engraving machine to perform optical finishing on the shape of the embryo plate. After determining the central optical axis of the embryo plate, process the input and output end faces of the embryo plate.

[0063] The input and output end faces are optically polished by using a machining center, and the roughness of the optical surface after polishing is controlled within 30 nm to obtain the optical fiber panel.

[0064] Some embodiments of the present invention further provide a high-transmittance, crosstalk-proof and electromagnetic pulse-resistant optical fiber panel, which includes an output end, an input end and an optical fiber portion arranged between the output end and the input end; the optical fiber portion includes a plurality of copper-silver alloy-plated optical fibers, and the copper-silver alloy-plated optical fibers are, from the inside to the outside, an optical fiber core layer 10, an optical fiber sheath 11 and a copper-silver alloy coating 8, and light-absorbing filaments 9 and interstitial filaments 7 are inserted between different copper-silver alloy-plated optical fibers. The light-absorbing filaments 9 can absorb stray light, and the interstitial filaments 7 can reduce the porosity ratio, such as Figure 2 shown.

[0065] The optical properties of the obtained optical fiber panel, such as transmittance and resistance to electromagnetic pulse, were tested.

[0066] In the above technical scheme, the present invention utilizes copper-silver alloy-plated optical fiber to prepare an optical fiber panel by directly plating the optical fiber filaments with a copper-silver alloy coating, arranging the single filaments, inserting light-absorbing filaments and white gap filaments for drawing, melting, pressing, and processing to produce an optical fiber panel; the phenomenon that its constituent unit - the optical fiber single filament is interfered by other optical fiber filaments during the image transmission process will be significantly improved.

[0067] Some embodiments of the present invention further provide an image-intensified CCD camera, which includes the above-mentioned high-transmittance, crosstalk-proof and electromagnetic pulse-resistant optical fiber panel.

[0068] Some embodiments of the present invention further provide an image-intensified CMOS camera, wherein the image-intensified CMOS camera comprises the above-mentioned high-transmittance, crosstalk-proof and electromagnetic pulse-resistant optical fiber panel.

[0069] The present invention will be further described below in conjunction with specific embodiments, but this should not be construed as limiting the scope of protection of the present invention. Some non-essential improvements and adjustments made to the present invention by technicians in this field based on the above-mentioned contents of the present invention still fall within the scope of protection of the present invention.

[0070] Example 1

[0071] The present embodiment provides a copper-silver alloy, in which, by weight percentage, the silver content of the copper-silver alloy is 92wt%, the sum of the contents of copper and silver is 99.995wt%, the oxygen content is 4.8ppm, the sum of the contents of iron, nickel, sulfur and phosphorus is 8ppm, and the sum of the contents of other impurities is 6ppm.

[0072] Among them, the melting point of the above-mentioned copper-silver alloy coating is 780°C, the softening temperature is about 500°C, the conductivity is 98.4% IACS, the coating elongation is 30%, the refractive index at a wavelength of 532nm is 1.28, the reflectivity at a wavelength of 532nm is about 87%, and the transmittance at a wavelength of 532nm is 72.65%.

[0073] The preparation method of the copper-silver alloy comprises the following steps:

[0074] 101. Determine the alloy composition and the corresponding proportion according to the above alloy ratio range; select the corresponding single metal material as the raw material, and accurately weigh the selected single metal to ensure that the proportion of each metal is accurate.

[0075] 102. Perform necessary pretreatment on the metal raw materials to avoid excessive particle size and remove oil, impurities and moisture, etc. The pretreatment includes degreasing (ultrasonic cleaning with 75% (v / v) alcohol for 20 minutes), drying (60°C, 30 minutes) and cutting (conventional). The degreasing, drying and cutting are all selected from the prior art, and the specific steps are not repeated here.

[0076] 103. Place the pretreated metal raw materials into the heating furnace, turn on the smelting equipment, and heat the metal to 790°C until the metal is completely melted. During the heating process, stir the molten metal in time to ensure that the metal is mixed evenly until the metal is completely dissolved and evenly distributed.

[0077] The steps of preparing the optical fiber panel using the copper-silver alloy specifically include:

[0078] 201. A skin glass tube with a refractive index of 1.50, an outer diameter of 31.17 mm, and an inner diameter of 28 mm and a core glass rod with a refractive index of 1.80 and an outer diameter of 27.8 mm are selected, and a primary glass tube is mounted on the primary glass rod to form an optical fiber preform rod. The optical fiber preform rod is melted into an optical fiber monofilament, and metal coating is performed, and a metal coating is plated on the outer surface to produce a metal-coated optical fiber monofilament.

[0079] 202. The optical fiber preform is drawn into optical fiber bare wire.

[0080] The optical fiber preform rod is heated to 820°C in a graphite furnace to fully soften the optical fiber preform rod. After the preform rod in the graphite furnace reaches a softened state, it is drawn into an optical fiber monofilament with a wire diameter of 3.2mm and a length of 1000mm. The drawing speed is controlled at about 12m / min.

[0081] 203. Then, a copper-silver alloy is coated on the surface of the bare optical fiber to form an optical fiber monofilament with a copper-silver alloy coating, and a fiber collecting device is used to collect the coated optical fiber monofilament to obtain the copper-silver alloy-coated optical fiber; the copper-silver alloy-coated optical fiber comprises, from the inside to the outside, an optical fiber core layer, an optical fiber sheath layer and a copper-silver alloy coating.

[0082] Among them, Figure 1 The copper-silver alloy particles in the metal coating device shown are heated to a melting point of 790°C, and then the prepared bare optical fiber is introduced into the metal coating device to start coating the bare optical fiber. The coating temperature is 790°C, and the thickness of the copper-silver alloy coating is 18μm. The coated optical fiber filaments are collected by a fiber collection device to obtain copper-silver alloy-coated optical fiber monofilaments. The copper-silver alloy layer on the outside of the optical fiber monofilament has a refractive index of 1.28 at a wavelength of 532nm, a reflectivity of about 87% at 532nm, a transmittance of 72.65% at a wavelength of 532nm, and a coating elongation of 30%. Under the test environment where the radiation intensity of the electromagnetic wave is 10V / m and the radiation frequency test fluctuation range is 80MHz~1GHz, the shielding effectiveness can reach 84.37dB.

[0083] 204. The black absorption rod is drawn into a light-absorbing single filament with a wire diameter of 0.3 mm under a heating condition of 820° C. The copper-plated silver alloy optical fiber single filaments are arranged in a hexagonal close stacking manner, and the light-absorbing filaments are uniformly filled in the gaps of the copper-plated silver alloy optical fiber single filaments to obtain a primary composite rod, which is drawn into a primary fiber filament (hereinafter referred to as primary filament).

[0084] The primary composite rod in this step includes metal-plated fiber monofilaments and light-absorbing fibers. The black absorption rod is made of N3 light-absorbing glass with good light-absorbing performance, and the absorption coefficient in the 500-600nm band reaches more than 0.95.

[0085] 205. Arrange multiple primary filaments in hexagonal close packing, and insert light-absorbing filaments into the gaps formed by the multiple primary filaments in hexagonal close packing according to a certain rule, that is, every two fiber cores share one light-absorbing filament, and then obtain a primary composite rod with a side size of 30 mm; draw the primary composite rod at 760°C to form a primary multifilament with a side size of 1.50 mm and a length of 1000 mm; cut the primary multifilament regularly, arrange it in hexagonal close packing and bundle it to obtain a secondary composite rod with a side size of 30 mm; draw the secondary composite rod at 785°C to form a secondary multifilament with a side size of 1.50 mm and a length of 1000 mm.

[0086] The primary composite rod and the secondary composite rod both have a regular hexagonal structure. In the step of arranging multiple single wires in the hexagonal closest arrangement and then bundling them to obtain the primary composite rod and the step of arranging multiple primary composite wires in the hexagonal closest arrangement and then bundling them to obtain the secondary composite rod, multiple single wires or primary wires need to be cut regularly and then arranged in a regular hexagonal mold, and after the arrangement is completed, they are bundled to obtain the primary composite rod or the secondary composite rod.

[0087] 206. After the secondary multifilament is laid out, it is placed in a high-precision fiber forming machine and pressed at 658°C to obtain a molten fiber bundle. The blank is rolled into a Φ60mm cylinder and then cut into a fixed length into a thin sheet blank with a thickness of 3mm.

[0088] 207. Use a precision engraving machine to perform optical finishing on the shape of the embryonic plate. After determining the central optical axis of the embryonic plate, process the input and output end faces of the embryonic plate.

[0089] The optical fiber panel is obtained by optically polishing the input and output end faces using a machining center, which includes an output end, an input end, and an optical fiber portion arranged between the output end and the input end; the optical fiber portion includes a plurality of copper-silver alloy-plated optical fibers, and the copper-silver alloy-plated optical fibers are, from the inside to the outside, an optical fiber core layer 10, an optical fiber sheath 11, and a copper-silver alloy coating 8, and light absorbing filaments 9 and filling filaments 7 are inserted between different copper-silver alloy-plated optical fibers.

[0090] The optical fiber panel of this embodiment can be used in the preparation of an image-intensified CCD camera.

[0091] Example 2

[0092] This embodiment provides a copper-silver alloy coating obtained by melting according to the alloy material ratio shown in Example 2 in Table 2, and a corresponding core glass rod and sheath glass tube to draw an optical fiber, coat the optical fiber monofilament, and test the performance of the material. The specific test results are shown in Table 2. The composition and proportion of the light absorbing glass are the same as those in Example 1. The optical fiber panel is prepared by referring to the method and parameters of Example 1, and the relevant parameters are shown in Table 2.

[0093] The optical fiber panel of this embodiment can be used in the preparation of an image-intensified CCD camera.

[0094] Example 3

[0095] This embodiment provides a copper-silver alloy coating obtained by melting the alloy material ratio shown in Example 3 of Table 2, and a corresponding core glass rod and sheath glass tube to draw an optical fiber, coat the optical fiber monofilament, and test the performance of the material. The specific test results are shown in Table 2. The composition and proportion of the light absorbing glass are the same as those in Example 1. The optical fiber panel is prepared by referring to the method and parameters of Example 1, and the relevant parameters are shown in Table 2.

[0096] The optical fiber panel of this embodiment can be used in the preparation of an image-intensified CCD camera.

[0097] Example 4

[0098] This embodiment provides a copper-silver alloy coating obtained by melting according to the alloy material ratio shown in Example 4 of Table 2, and a corresponding core glass rod and sheath glass tube to draw an optical fiber, coat the optical fiber monofilament, and test the performance of the material. The specific test results are shown in Table 2. The composition and proportion of the light absorbing glass are the same as those in Example 1. The optical fiber panel is prepared by referring to the method and parameters of Example 1, and the relevant parameters are shown in Table 2.

[0099] The optical fiber panel of this embodiment can be used in the preparation of an image-intensified CCD camera.

[0100] Example 5

[0101] This embodiment provides a copper-silver alloy coating obtained by melting according to the alloy material ratio shown in Example 5 of Table 2, and a corresponding core glass rod and sheath glass tube to draw an optical fiber, coat the optical fiber monofilament, and test the performance of the material. The specific test results are shown in Table 2. The composition and proportion of the light absorbing glass are the same as those in Example 1. The optical fiber panel is prepared by referring to the method and parameters of Example 1, and the relevant parameters are shown in Table 2.

[0102] The optical fiber panel of this embodiment can be used in the preparation of an image-intensified CCD camera.

[0103] Example 6

[0104] This embodiment provides a copper-silver alloy coating obtained by melting according to the alloy material ratio shown in Example 6 of Table 2, and a corresponding core glass rod and sheath glass tube to draw an optical fiber, coat the optical fiber monofilament, and test the performance of the material. The specific test results are shown in Table 2. The composition and proportion of the light absorbing glass are the same as those in Example 1. The optical fiber panel is prepared by referring to the method and parameters of Example 1, and the relevant parameters are shown in Table 2.

[0105] The optical fiber panel of this embodiment can be used in the preparation of an image-intensified CCD camera.

[0106] Example 7

[0107] This embodiment provides a copper-silver alloy coating obtained by melting according to the alloy material ratio shown in Example 7 of Table 2, and a corresponding core glass rod and sheath glass tube to draw an optical fiber, coat the optical fiber monofilament, and test the performance of the material. The specific test results are shown in Table 2. The composition and proportion of the light absorbing glass are the same as those in Example 1. The optical fiber panel is prepared by referring to the method and parameters of Example 1, and the relevant parameters are shown in Table 2.

[0108] The optical fiber panel of this embodiment can be used in the preparation of an image-intensified CCD camera.

[0109] Example 8

[0110] This embodiment provides a copper-silver alloy coating obtained by melting according to the alloy material ratio shown in Example 8 of Table 2, and a corresponding core glass rod and sheath glass tube to draw an optical fiber, coat the optical fiber monofilament, and test the performance of the material. The specific test results are shown in Table 2. The composition and proportion of the light absorbing glass are the same as those in Example 1. The optical fiber panel is prepared by referring to the method and parameters of Example 1, and the relevant parameters are shown in Table 2.

[0111] The optical fiber panel of this embodiment can be used in the preparation of an image-intensified CCD camera.

[0112] The optical fiber panels obtained in Examples 1-8 were tested for transmittance and anti-electromagnetic pulse performance. The test methods are respectively to compare the light intensity of the incident light and the outgoing light to calculate the transmittance of the optical fiber panel; to measure at multiple frequency points of the traditional optical fiber panel, record the receiving value PO at each frequency, and then to measure at multiple frequency points of the embodiment with copper-silver alloy coating, record the receiving value PI at each frequency, and calculate the shielding effectiveness of the coated optical fiber panel; the coating elongation is measured by an electronic universal testing machine.

[0113] Table 2 Alloy components of Examples 1-8 and performance test table of coated optical fiber panels obtained by mixing

[0114]

[0115] It can be seen from the data in Table 2 that the copper-silver alloy coating of Examples 1-8 of the present invention has a refractive index of 1.28-1.31 at a wavelength of 532nm, a reflectivity of 87%-89% at a wavelength of 532nm, a conductivity of 98.4-99.0% IACS, and a coating elongation of 30%-31%; the transmittance of the panel at a wavelength of 532nm is 72.48%-72.67%; the shielding effectiveness can reach 84.37dB-85.61dB under the test environment where the radiation intensity of the electromagnetic wave is 10V / m and the radiation frequency test fluctuation range is 80MHz-1GHz; the texture of Ag is softer , the conductivity is better than Cu. When there is electromagnetic pulse interference, the external copper-silver alloy coating can effectively reflect the pulse signal, and part of the pulse signal transmitted into the copper-silver alloy coating is guided out along the direction of the copper-silver alloy coating, thereby reducing the interference with the transmission signal of the optical fiber panel. Therefore, as the Ag content increases, the ability of the optical fiber panel to resist electromagnetic pulses increases, and the conductivity and elongation of the copper-silver alloy coating increase; the increase in the reflectivity of the copper-silver alloy coating effectively reduces the optical crosstalk between optical fibers, the resolution of the optical fiber panel is improved, and the imaging quality is also improved accordingly; at the same time, the overflow of the optical signal is reduced, and the transmittance of the optical fiber panel is also increased. The performance of the above optical fiber panel meets the requirements of steps 101-103 and steps 201-208, and the thickness of the copper-silver alloy coating is 18μm, which can ensure that the manufactured optical fiber panel has high anti-interference and can effectively control the preparation cost of the optical fiber panel.

[0116] Comparative Example 1:

[0117] According to the core and skin glass component ratios shown in Example 1, a core and skin glass rod tube is prepared, and the metal ratio is adjusted. The coating metal uses a metal with a silver content of 99.995wt%, an oxygen content of 4.8ppm, a sum of the contents of iron, nickel, sulfur and phosphorus of 8ppm, and a sum of the contents of other impurities of 6ppm. Then, the optical fiber panel preparation method of inserting light absorbing wires, structural wires, etc. is used to prepare an optical fiber panel. Since the coating metal is almost pure silver, the melting point of the metal is significantly increased, exceeding 900°C, and the temperature during coating needs to be increased to completely melt the coating metal. Since the coating temperature is too high, the optical fiber single filament is deformed, and the complete single filament coating process cannot be carried out, and the optical fiber panel cannot be made.

[0118] Comparative Example 2:

[0119] According to the core and skin glass component ratio shown in Example 1, a core and skin glass rod tube is prepared, and then the thickness of the metal coating is reduced, and a fiber panel preparation method is used to insert light absorption wires, structural wires, etc. into a single optical fiber with a metal coating of 15 μm, and the rest is consistent with Example 1 to prepare an anti-interference optical fiber panel. The shielding ability of the optical fiber panel of Comparative Example 2 is significantly reduced, and the shielding effectiveness is reduced to about 70 dB.

[0120] In the specification of the present invention, a lot of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some embodiments, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this specification.

[0121] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0122] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

[0123] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A copper-silver alloy, characterized in that: In terms of weight percentage, the sum of the contents of copper and silver in the copper-silver alloy is ≥99.995wt%, and the content of silver is 92wt% to 95wt%.

2. The copper-silver alloy according to claim 1, characterized in that The oxygen content in the copper-silver alloy is less than 5ppm, the sum of the contents of iron, nickel, sulfur and phosphorus is less than 8ppm, and the sum of the contents of other impurities is less than 6ppm.

3. A method for preparing a copper-silver alloy, characterized in that: The following steps are involved: The alloy composition and the corresponding proportion are determined according to the sum of the contents of copper and silver in the copper-silver alloy being ≥99.995wt% and the content of silver being 92wt% to 95wt%; the corresponding single metal material is selected as the raw material, and the metal raw material is pretreated; the pretreated metal raw material is heated to 780 to 800° C. while stirring until the metal is completely melted and mixed evenly, so as to obtain the copper-silver alloy.

4. A method for preparing a copper-silver alloy-coated optical fiber, characterized in that: The following steps are involved: S1 draws the optical fiber preform into optical fiber bare wire; S2: coating the surface of the bare optical fiber with a copper-silver alloy to form an optical fiber monofilament with a copper-silver alloy coating, and collecting the optical fiber monofilament to obtain the copper-silver alloy-coated optical fiber.

5. A copper-silver alloy-coated optical fiber, characterized in that: The copper-silver alloy-plated optical fiber comprises, from the inside to the outside, an optical fiber core layer, an optical fiber sheath and a copper-silver alloy plating layer; in terms of weight percentage, the oxygen content in the copper-silver alloy plating layer is <5ppm, the sum of the contents of iron, nickel, sulfur and phosphorus is ≤8ppm, and the sum of the contents of other impurities is ≤6ppm.

6. A high-transmittance, crosstalk-proof and electromagnetic pulse-resistant optical fiber panel, characterized in that: The optical fiber portion comprises a plurality of copper-silver alloy-plated optical fibers, wherein the copper-silver alloy-plated optical fibers are, from the inside to the outside, an optical fiber core layer, an optical fiber sheath, and a copper-silver alloy coating, and light absorbing filaments and interstitial filaments are inserted between different copper-silver alloy-plated optical fibers; in terms of weight percentage, the oxygen content in the copper-silver alloy coating is <5ppm, the sum of the contents of iron, nickel, sulfur, and phosphorus is ≤8ppm, and the sum of the contents of other impurities is ≤6ppm.

7. A method for preparing a high-transmittance, crosstalk-proof and electromagnetic pulse-resistant optical fiber panel, characterized in that: The following steps are involved: a. Put the leather tube on the core rod to make an optical fiber preform; b. melting the optical fiber preform obtained in step a into an optical fiber monofilament, and performing a metal coating process to coat a metal coating on the outer surface to produce a metal-coated optical fiber monofilament; c. Drawing the black absorption rod into a light-absorbing monofilament, and arranging the metal-plated optical fiber monofilaments obtained in step b in a hexagonal close-packed manner, and uniformly filling the light-absorbing filaments in the gaps of the metal-plated optical fiber monofilaments to obtain a primary composite rod, and drawing the primary composite rod into a primary fiber filament; d. Arranging a plurality of primary fiber filaments in a hexagonal close-packed manner, and inserting a light-absorbing filament into the gaps formed by the hexagonal close-packed arrangement of the plurality of primary fiber filaments according to a certain rule to obtain a primary composite rod; drawing the primary composite rod into a primary multifilament; then regularly cutting the primary multifilament, arranging the hexagonal close-packed filaments and bundling them to obtain a secondary composite rod; drawing the secondary composite rod into a secondary multifilament; then regularly cutting the secondary multifilament, arranging the hexagonal close-packed filaments and bundling them to obtain a secondary multifilament rod; e. Drawing the secondary multifilament rod obtained in step d at 658-668° C. to obtain a molten fiber bundle; After being cut to a fixed length and then mechanically cold processed, a cylindrical blank is obtained; the blank is optically finely processed and optically polished to obtain the optical fiber panel with high transmittance, anti-crosstalk and anti-electromagnetic pulse.

8. The method for preparing a high-transmittance, crosstalk-proof and electromagnetic pulse-resistant optical fiber panel according to claim 7, characterized in that: In step a, the refractive index of the leather tube at a wavelength of 532nm is 1.50-1.51, and the refractive index of the core rod at a wavelength of 532nm is 1.80-1.81; in step c, the primary composite rod includes metal-plated fiber monofilaments and light-absorbing filaments; the black absorption rod is made of glass with an absorption coefficient of more than 0.95 in the 500-600nm band.

9. An image-intensified CCD camera, characterized in that: The image-intensified CCD camera comprises the high-transmittance, crosstalk-proof and electromagnetic pulse-resistant optical fiber panel as described in claim 6.

10. An image-intensified CMOS camera, characterized in that: The image-intensified CMOS camera comprises the high-transmittance, crosstalk-proof and electromagnetic pulse-resistant optical fiber panel as claimed in claim 6.

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