Manufacturing method of image transmission optical fiber and image transmission optical fiber

Abstract

The present application provides a method for manufacturing an image transmission optical fiber and an image transmission optical fiber. The method for manufacturing the image transmission optical fiber includes: providing a single optical fiber filament; arranging and drawing the single optical fiber filament to obtain a first composite optical fiber; arranging and drawing the first composite optical fiber to obtain a second composite optical fiber; wherein, the shapes of the first composite optical fiber and the second composite optical fiber satisfy one of the following conditions: (a) the first composite optical fiber is a parallelogram and the second composite optical fiber is a parallelogram; (b) the first composite optical fiber is a regular hexagon and the second composite optical fiber is a parallelogram. During the drawing process, the first composite optical fiber adopts a parallelogram or a regular hexagon, so that a second composite optical fiber with a parallelogram shape can be directly arranged and drawn, improving the utilization rate of the blank and reducing the manufacturing cost; in addition, the single optical fiber filament and the first composite optical fiber are not placed in a glass tube, so the arrangement of the single optical fiber filaments in the image transmission optical fiber is more compact and uniform, improving the imaging quality of the image transmission optical fiber.

Description

Technical Field

[0001] The present application relates to the field of optical fiber drawing, and in particular to a method for manufacturing an image transmission optical fiber and an image transmission optical fiber. Background Art

[0002] Image transmission optical fibers are widely used in high-precision optical detection devices, which can replace the existing optical lens structure, improve the detection accuracy and reduce the size of the device. The image transmission optical fiber is formed by combining single optical fibers. In the manufacturing process of the image transmission optical fiber, the drawing of the composite optical fiber is a key step. The conventional optical fiber composite method is to arrange single optical fiber filaments into a composite optical fiber, and then fix the composite optical fiber in the form of cotton thread bundling, etc., and then clamp and draw the wire.

[0003] At present, a manufacturing method for an image transmission optical fiber with secondary composite has emerged. In some existing technologies, single optical fiber filaments are first arranged and fixed in a quartz tube to form a multi-core rod, and then the multi-core rod is drawn to obtain a composite optical fiber. After that, the composite optical fiber is arranged and fixed in a quartz tube for secondary drawing, so as to obtain an image transmission optical fiber product with higher resolution.

[0004] However, such a manufacturing method is only suitable for drawing circular image transmission optical fiber products. If it is necessary to manufacture a parallelogram-shaped image transmission optical fiber product, it is also necessary to perform hot pressing or cold processing on the drawn image transmission optical fiber, and the processing efficiency and the blank utilization rate are relatively low, and the manufacturing cost is relatively high.

[0005] On the other hand, the wall of the quartz tube will occupy a certain space, resulting in the arrangement of single optical fiber filaments in the image transmission optical fiber not being tight and uniform enough, which affects the image transmission quality of the image transmission optical fiber. Summary of the Invention

[0006] The present application aims to at least solve one of the technical problems existing in the prior art. For this purpose, the present application provides a method for manufacturing an image transmission optical fiber and an image transmission optical fiber. The method for manufacturing an image transmission optical fiber is suitable for manufacturing a parallelogram-shaped image transmission optical fiber and can improve the tightness of the arrangement of single optical fiber filaments.

[0007] According to the method for manufacturing an image transmission optical fiber provided by the present application, it includes:

[0008] Providing single optical fiber filaments;

[0009] Arranging and drawing the single optical fiber filaments to obtain a first composite optical fiber;

[0010] Arranging and drawing the first composite optical fiber to obtain a second composite optical fiber;

[0011] Wherein, the shapes of the first composite optical fiber and the second composite optical fiber satisfy one of the following conditions:

[0012] (a) The first composite optical fiber is a parallelogram, and the second composite optical fiber is a parallelogram;

[0013] (b) The first composite optical fiber is a regular hexagon, and the second composite optical fiber is a parallelogram.

[0014] According to the method for manufacturing an image transmission optical fiber provided by the present application, it has at least the following technical effects: First, the method for manufacturing the image transmission optical fiber performs at least two drawing processes, thereby improving the resolution of the image transmission optical fiber; Second, during the drawing process, the first composite optical fiber adopts a parallelogram or a regular hexagon, so that it can be directly arranged and drawn into a parallelogram-shaped second composite optical fiber, without the need for hot pressing or cold processing after the drawing is completed, improving the utilization rate of the blank and reducing the manufacturing cost of the image transmission optical fiber; Finally, when drawing, the single optical fiber filaments and the first composite optical fiber are not placed in a glass tube, so the arrangement of the single optical fiber filaments in the image transmission optical fiber is more compact and uniform, improving the imaging quality of the image transmission optical fiber.

[0015] According to some embodiments of the present application, a single optical fiber filament is provided, including: placing a core material into a tube material to obtain a single core rod, and drawing the single core rod to obtain the single optical fiber filament.

[0016] According to some embodiments of the present application, the diameter of the single optical fiber filament is greater than or equal to 0.5 mm.

[0017] According to some embodiments of the present application, arranging and drawing the single optical fiber filaments includes:

[0018] Closely packing the single optical fiber filaments in a first mold to form a first composite rod, the shape of the first mold corresponding to the shape of the first composite optical fiber;

[0019] Fixing the first composite rod using a first fixture;

[0020] Removing the first composite rod and drawing it to obtain the first composite optical fiber.

[0021] According to some embodiments of the present application, the side length or the length of the opposite sides of the first composite optical fiber is greater than or equal to 0.8 mm.

[0022] According to some embodiments of the present application, the first mold includes a support member, the support member includes a bottom surface, the support member is provided with a first positioning member and a second positioning member, the first positioning member, the second positioning member and the support member enclose an arrangement area, and the first positioning member and the second positioning member can approach or move away from each other.

[0023] According to some embodiments of the present application, the first fixture includes a first pressing member and a second pressing member, the first pressing member and the second pressing member enclose a fixing area, and the first pressing member and the second pressing member can approach or move away from each other.

[0024] According to some embodiments of the present application, arranging and drawing the first composite optical fiber includes:

[0025] Closely packing the first composite optical fiber in a second mold to form a second composite rod, the shape of the second mold corresponding to the shape of the second composite optical fiber;

[0026] Fixing the second composite rod using a second fixture;

[0027] Removing the second composite rod and drawing it to obtain the second composite optical fiber.

[0028] According to some embodiments of the present application, the method for manufacturing the image transmission optical fiber further includes post-processing the second composite optical fiber, and the post-processing includes annealing, cutting, and end face polishing.

[0029] The image transmission optical fiber provided by the present application is made by the method for manufacturing the image transmission optical fiber provided by the present application.

[0030] The image transmission optical fiber provided by the present application correspondingly has the beneficial effects brought by the method for manufacturing the image transmission optical fiber provided by the present application, which will not be elaborated here. Description of the Drawings

[0031] The above and / or additional aspects and advantages of the present application will become apparent and easy to understand from the description of the embodiments in conjunction with the following drawings, where:

[0032] Figure 1 is a schematic flowchart of the method for manufacturing the image transmission optical fiber according to the embodiment of the present application;

[0033] Figure 2 is a schematic diagram of the arrangement of the second composite optical fiber in the method for manufacturing the image transmission optical fiber according to the embodiment of the present application, where the first composite optical fiber is a parallelogram at this time;

[0034] Figure 3 is a schematic diagram of the arrangement of the second composite optical fiber in the method for manufacturing the image transmission optical fiber according to the embodiment of the present application, where the first composite optical fiber is a regular hexagon at this time;

[0035] Figure 4 is a schematic structural diagram of the first mold according to the embodiment of the present application;

[0036] Figure 5 is a schematic structural diagram of the first fixture according to the embodiment of the present application;

[0037] Figure 6 is a schematic structural diagram of the first fixture according to the embodiment of the present application;

[0038] Figure 7 is a schematic diagram when arranging single optical fiber filaments in the method for manufacturing the image transmission optical fiber according to the embodiment of the present application.

[0039] Reference numerals:

[0040] The first mold 100, the support member 110, the first positioning member 120, the second positioning member 130, the second groove 131, the fastener 140,

[0041] The first fixture 200, the first pressing member 210, the first arm 211, the second arm 212, the third arm 213, the third groove 214, the fourth groove 215, the second pressing member 220, the fourth arm 221, the fifth arm 222, the sixth arm 223, the first adjusting member 230, the second adjusting member 240,

[0042] The single optical fiber filament 310, the first composite optical fiber 320, the second composite optical fiber 330. Detailed implementation manners

[0043] The embodiments of the present application will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present application, and should not be construed as a limitation to the present application.

[0044] In the description of the present application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., refer to the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0045] In the description of the present application, the meaning of "a number of" is one or more, the meaning of "a plurality of" is two or more, "greater than", "less than", "exceeding", etc. are understood as not including the present number, and "above", "below", "within", etc. are understood as including the present number. If there is a description of "first" and "second", it is only for the purpose of distinguishing technical features and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0046] In the description of the present application, unless otherwise clearly defined, words such as "set", "installed", "connected", etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present application in combination with the specific content of the technical solution.

[0047] Referring to Figure 1 , according to the method for manufacturing an image transmission optical fiber provided by the present application, it includes

[0048] Providing a single optical fiber filament 310;

[0049] Arrange and draw a single optical fiber filament 310 to obtain a first composite optical fiber 320;

[0050] Arrange and draw the first composite optical fiber 320 to obtain a second composite optical fiber 330;

[0051] Among them, the shapes of the first composite optical fiber 320 and the second composite optical fiber 330 satisfy one of the following conditions:

[0052] (a) The first composite optical fiber 320 is a parallelogram, and the second composite optical fiber 330 is a parallelogram;

[0053] (b) The first composite optical fiber 320 is a regular hexagon, and the second composite optical fiber 330 is a parallelogram.

[0054] First, the manufacturing method of the image transmission optical fiber is drawn at least twice, so as to improve the resolution of the image transmission optical fiber; second, during the drawing process, the first composite optical fiber 320 adopts a parallelogram or a regular hexagon, so that the second composite optical fiber 330 with a parallelogram shape can be directly arranged and drawn without further fusion pressing or cold processing after the drawing is completed, improving the utilization rate of the blank and reducing the manufacturing cost of the image transmission optical fiber; finally, the single optical fiber filament 310 and the first composite optical fiber 320 are not placed in the glass tube during the drawing, so the arrangement of the single optical fiber filament 310 in the image transmission optical fiber is more compact and uniform, improving the imaging quality of the image transmission optical fiber.

[0055] Figure 2 and Figure 3 Schematically shows the principle when the first composite optical fiber 320 forms the second composite optical fiber 330. Among them, the area outlined by the center line frame is a first composite optical fiber 320. Refer to Figure 2 and Figure 3 , both the parallelogram first composite optical fiber 320 and the regular hexagon first composite optical fiber 320 can be arranged in a close-packed manner to form a parallelogram second composite optical fiber 330. Further refer to Figure 3 , for the second composite optical fiber 330 made of the regular hexagon first composite optical fiber 320, the serrations at the edge are relatively large and are not suitable for image transmission optical fiber products with high boundary requirements, while the second composite optical fiber 330 made of the parallelogram first composite optical fiber 320 can overcome this defect. It can be understood that a parallelogram also includes a rectangle.

[0056] In some embodiments, a single optical fiber filament 310 is provided, which includes: putting the core material into the tube material to obtain a single core rod, and drawing the single core rod to obtain the single optical fiber filament 310. It should be noted that the smaller the diameter of the single optical fiber filament 310, the greater the difficulty of arranging it, and defects such as insufficiently tight arrangement and breakage of the single optical fiber filament 310 are likely to occur. Therefore, in some embodiments, the diameter of the single optical fiber filament 310 is greater than or equal to 0.5 mm for subsequent arrangement and drawing. If the diameter of the single optical fiber filament 310 is too large, the number of arranged single optical fiber filaments 310 will be small. Therefore, in some embodiments, the diameter of the single optical fiber can be between 0.5 mm and 5 mm.

[0057] In some embodiments, arranging and drawing the single optical fiber filament 310 includes:

[0058] Closely packing the single optical fiber filaments 310 in the first mold 100 to form a first composite rod, and the shape of the first mold 100 corresponds to the shape of the first composite optical fiber 320;

[0059] Using the first fixture 200 to fix the first composite rod;

[0060] Removing the first composite rod and drawing it to obtain the first composite optical fiber 320.

[0061] The manufacturing method of the image transmission optical fiber uses the first mold 100 to provide support for the placement and arrangement of the single optical fiber filaments 310, so as to facilitate the accurate placement of the single optical fiber filaments 310 into a set shape. After the placement is completed, the first composite rod is transferred to the drawing equipment for drawing. The first fixture 200 is used to clamp and fix the first composite rod, so that the shape of the first composite rod can be stably maintained, avoiding the displacement of the single optical fiber filaments 310 during the transfer process and ensuring the finished product quality of the image transmission optical fiber.

[0062] In some embodiments, the side length or the length of the opposite sides of the first composite optical fiber 320 is greater than or equal to 0.8 mm for subsequent arrangement and drawing. In some embodiments, the side length or the length of the opposite sides of the first composite optical fiber 320 can be between 0.8 mm and 3 mm.

[0063] In some embodiments, the first mold 100 includes a support member 110. The support member 110 includes a bottom surface. The first positioning member 120 and the second positioning member 130 are installed on the support member 110. The first positioning member 120, the second positioning member 130, and the support member 110 enclose an arrangement area, and the first positioning member 120 and the second positioning member 130 can approach or move away from each other. When in use, first arrange the first row of single optical fiber filaments 310 on the support member 110, and then the first positioning member 120 and the second positioning member 130 approach each other and contact the single optical fiber filaments 310, so as to accurately define the arrangement area of the single optical fiber filaments 310. Refer to Figure 4, when the first composite optical fiber 320 is in a parallelogram shape, the first positioning member 120 includes a first inclined surface, and the second positioning member 130 includes a second inclined surface, thereby defining the shape of a parallelogram.

[0064] At least one of the first positioning member 120 and the second positioning member 130 is movably installed so as to move closer to each other. Specifically, referring to Figure 4 , in some embodiments, the second positioning member 120 includes a first groove, the first groove cooperates with the support member, and the second positioning member 130 can slide on the support member 110 under the guiding action of the first groove. The second positioning member 120 further includes a second groove 131, and the fastener 140 fixes the second positioning member 120 through the second groove 131. The fastener 140 can be a screw, the support member 110 is provided with a threaded hole, and the screw is screwed into the threaded hole to press the second positioning member 120 against the support member 110.

[0065] In some embodiments, the first fixture 200 includes a first pressing member 210 and a second pressing member 220. The first pressing member 210 and the second pressing member 220 enclose a fixing area, and the first pressing member 210 and the second pressing member 220 can move closer to or away from each other. The first pressing member 210 and the second pressing member 220 are of a rigid structure. Compared with flexible deformable structures such as ropes, the rigid structure can better fix the first composite rod in a parallelogram or a regular hexagon, avoid the displacement of the single optical fiber filament 310 during the transfer process, and ensure the finished product quality of the image transmission optical fiber.

[0066] Taking the drawing of the first composite optical fiber 320 in a parallelogram shape as an example, the first fixture 200 needs to contact four faces of the first composite rod to achieve stable and reliable pressing. In some embodiments, the first pressing member 210 includes a first pressing surface and a second pressing surface, the second pressing surface is located on one side of the first pressing surface, the second pressing member 220 includes a third pressing surface and a fourth pressing surface, and the fourth pressing surface is located on one side of the third pressing surface. In some other embodiments, it may also be that the first pressing member 210 includes a first pressing surface, the second pressing member 220 includes a second pressing surface, a third pressing surface and a fourth pressing surface, and the second pressing surface and the fourth pressing surface are respectively located on both sides of the third pressing surface.

[0067] In some embodiments, the first fixture 200 includes a first adjusting member 230 and a second adjusting member 240. The first adjusting member 230 is used to drive the first pressing surface and the third pressing surface to move closer to each other in a first direction, and the second adjusting member 240 is used to drive the second pressing surface and the fourth pressing surface to move closer to each other in a second direction.

[0068] Referring to Figure 5 and Figure 6, in some embodiments, the first pressing member 210 includes a first arm 211, a second arm 212, and a third arm 213 connected in sequence. The first arm 211 forms a first pressing surface, the second arm 212 forms a second pressing surface, the third arm 213 is disposed opposite to the first pressing surface, and the first adjusting member 230 is mounted on the third arm 213. The second pressing member 220 includes a fourth arm 221, a fifth arm 222, and a sixth arm 223 connected in sequence. The fourth arm 221 forms a fourth pressing surface, the fifth arm 222 forms a third pressing surface, the sixth arm 223 is disposed opposite to the fourth pressing surface, and the second adjusting member 240 is mounted on the sixth arm 223. The first arm 211 and the third arm 213 are located on both sides of the fifth arm 222 in a first direction. The first adjusting member 230 abuts against the fifth arm 222, and the first adjusting member 230 drives the fifth arm 222 to approach the first arm 211. The fourth arm 221 and the sixth arm 223 are located on both sides of the second arm 212 in a second direction. The second adjusting member 240 abuts against the second arm 212, and the second adjusting member 240 drives the second arm 212 to approach the fourth arm 221.

[0069] In some embodiments, a third groove 214 is formed in the second arm 212, the fifth arm 222 passes through the third groove 214, a fourth groove 215 is formed in the first arm 211, and the fourth arm 221 is embedded in the fourth groove 215. The third groove 214 and the fourth groove 215 can play a positioning role, making the positional relationship between the first pressing member 210 and the second pressing member 220 more stable and accurate.

[0070] Figure 7 Shows a schematic diagram of the manufacturing method of the image transmission optical fiber when using the first mold 100 and the first fixture 200. As Figure 7 shown, a plurality of first molds 100 are arranged in an array to form a plurality of fulcrums for supporting the single optical fiber filaments 310, so that the single optical fiber filaments 310 can be stably and accurately arranged into the required shape. One end of the first mold 100 is open, which is convenient for taking out the first composite rod. The first fixture 200 clamps the first composite rod from multiple positions, improving the clamping reliability.

[0071] In some embodiments, arranging and drawing the first composite optical fiber 320 includes:

[0072] Closely packing the first composite optical fiber 320 in the second mold to form a second composite rod, and the shape of the second mold corresponds to the shape of the second composite optical fiber 330;

[0073] Fixing the second composite rod using the second fixture;

[0074] Removing the second composite rod and drawing to obtain the second composite optical fiber 330.

[0075] The structural principles and functions of the second mold and the second fixture are similar to those of the first mold 100 and the first fixture 200, and will not be elaborated here.

[0076] In some embodiments, the method for manufacturing the image transmission optical fiber further includes post-processing the second composite optical fiber 330, and the post-processing includes annealing, cutting, and end surface polishing. Annealing can eliminate the thermal stress of the second composite optical fiber 330, cutting enables the second composite optical fiber 330 to reach a set length, and end surface polishing can improve the end surface accuracy of the second composite optical fiber 330 to achieve clear image transmission.

[0077] The image transmission optical fiber provided by the present application is made by the method for manufacturing the image transmission optical fiber provided by the present application. It can be understood that if only two drawings are performed, the second composite optical fiber 330 is the required image transmission optical fiber, and if more than two drawings are performed, the composite optical fiber after the last drawing is the required image transmission optical fiber.

[0078] For the image transmission optical fiber provided by the present application, first, the method for manufacturing the image transmission optical fiber performs at least two drawings, thereby improving the resolution of the image transmission optical fiber; second, during the drawing, the first composite optical fiber 320 adopts a parallelogram or a regular hexagon, so that it can be directly arranged and drawn into a parallelogram-shaped second composite optical fiber 330 without performing fusion pressing or cold processing after the drawing is completed, improving the utilization rate of the blank and reducing the manufacturing cost of the image transmission optical fiber; finally, the single optical fiber filaments 310 and the first composite optical fiber 320 are not placed in the glass tube during the drawing, so the arrangement of the single optical fiber filaments 310 in the image transmission optical fiber is more compact and uniform, improving the imaging quality of the image transmission optical fiber.

[0079] The following refers to Figure 1 A specific embodiment is used to describe in detail the method for manufacturing the image transmission optical fiber and the image transmission optical fiber provided by the present application. It should be understood that the following description is only an exemplary illustration and not a specific limitation of the present application. This specific embodiment can also be replaced by the corresponding technical features above or combined with the technical features above.

[0080] In this embodiment, two drawings are performed in total. The first composite optical fiber 320 is a regular hexagon, and the second composite optical fiber 330 is a parallelogram.

[0081] The method for manufacturing the image transmission optical fiber includes the following steps:

[0082] Step S100: Select a core material with a diameter of 38 mm and a tube material with an inner diameter of 39 mm and a wall thickness of 2 mm for cleaning and drying. Place the core material into the tube material, and then clamp the combined single core rod on the wire drawing machine for heating and drawing to obtain single optical fiber filaments 310 with a diameter of 3.8 mm;

[0083] Step S200: In the first mold 100, 61 drawn single optical fiber filaments 310 with a diameter of 3.8 mm are arranged into a regular hexagonal first composite rod with an opposite side dimension of 30.16, clamped using the first fixture 200, and then the arranged first composite rod is drawn on a wire drawing machine into a first composite optical fiber 320 with an opposite side dimension of 0.84 mm;

[0084] Step S300: In the second mold, 630 drawn first composite optical fibers 320 with an opposite side of 0.84 mm are arranged into a parallelogram second composite rod with dimensions of 39.1 mm * 10.4 mm, clamped using the second fixture, and then the arranged second composite rod is drawn on a wire drawing machine into a second composite optical fiber 330 with a cross-section of 3 mm * 0.8 mm and a length of 1050 mm. The second composite optical fiber 330 is the semi-finished image transmission optical fiber;

[0085] Step S400: Anneal the second composite optical fiber 330, cut the two end faces of the second composite optical fiber 330 flat, and then perform fine grinding and polishing to process it into an image transmission optical fiber product with a length of 1000 mm.

[0086] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0087] In some alternative embodiments, the functions / operations mentioned in the block diagram may not occur in the order mentioned in the operation diagram. For example, depending on the functions / operations involved, two consecutive blocks shown can actually be executed substantially simultaneously or the blocks can sometimes be executed in the reverse order. In addition, the embodiments presented and described in the flowcharts of the present application are provided by way of example for the purpose of providing a more comprehensive understanding of the technology. The disclosed methods are not limited to the operations and logical flows presented herein. Alternative embodiments are foreseeable, in which the order of various operations is changed and the sub-operations described as part of a larger operation are executed independently.

[0088] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present application. The scope of the present application is defined by the claims and their equivalents.

Claims

1. A method for manufacturing an image transmission optical fiber, characterized in that, Including: Providing a single optical fiber filament; Arranging and drawing the single optical fiber filament to obtain a first composite optical fiber. Arranging and drawing the single optical fiber filament includes tightly packing the single optical fiber filament in a first mold to form a first composite rod, the shape of the first mold corresponding to the shape of the first composite optical fiber; fixing the first composite rod using a first fixture; removing the first composite rod and drawing to obtain the first composite optical fiber; Wherein, the first mold includes a support member, the support member includes a bottom surface, the support member is provided with a first positioning member and a second positioning member, the first positioning member, the second positioning member and the support member surround to form an arranging area, the first positioning member and the second positioning member can approach or move away from each other. During use, first arrange the first row of the single optical fiber filaments on the support member, and then the first positioning member and the second positioning member approach each other and contact the single optical fiber filaments, thereby defining the arranging area of the single optical fiber filaments; The first fixture includes a first pressing member and a second pressing member, the first pressing member and the second pressing member surround to form a fixing area, the first pressing member and the second pressing member can approach or move away from each other; Arranging and drawing the first composite optical fiber to obtain a second composite optical fiber; Wherein, the shapes of the first composite optical fiber and the second composite optical fiber satisfy one of the following conditions: (a) The first composite optical fiber is a parallelogram, and the second composite optical fiber is a parallelogram; (b) The first composite optical fiber is a regular hexagon, and the second composite optical fiber is a parallelogram.

2. The manufacturing method of the image transmission optical fiber according to claim 1, characterized in that: Providing a single optical fiber filament includes: putting a core material into a tube material to obtain a single core rod, and drawing the single core rod to obtain the single optical fiber filament.

3. The manufacturing method of the image transmission optical fiber according to claim 1 or 2, characterized in that: The diameter of the single optical fiber filament is greater than or equal to 0.5 mm.

4. The manufacturing method of the image transmission optical fiber according to claim 1, characterized in that: The side length or the length of the opposite sides of the first composite optical fiber is greater than or equal to 0.8 mm.

5. The manufacturing method of the image transmission optical fiber according to claim 1, characterized in that: Arranging and drawing the first composite optical fiber includes: Tightly packing the first composite optical fiber in a second mold to form a second composite rod, the shape of the second mold corresponding to the shape of the second composite optical fiber; Fixing the second composite rod using a second fixture; Removing the second composite rod and drawing to obtain the second composite optical fiber.

6. The manufacturing method of the image transmission optical fiber according to claim 1, characterized in that: The method for manufacturing the image transmission optical fiber further includes post-processing the second composite optical fiber, and the post-processing includes annealing, cutting and end face polishing.

7. A picture transmission optical fiber, characterized in that: The image transmission optical fiber is made by the method for manufacturing the image transmission optical fiber according to any one of claims 1 to 6.

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