Preparation method of optical fiber image transmitting element

Abstract

The invention discloses a preparation method of an optical fiber image transmitting element, which comprises the following steps: acquiring single optical fibers, arranging a plurality of single optical fibers into a parallelogram, and filling gaps of the parallelogram with absorption wires and filling wires; drawing the parallelogram into a parallelogram primary composite optical fiber with a first preset side length and a second preset side length; the first preset side length is greater than or smaller than the second preset side length; arranging a plurality of parallelogram primary composite optical fiber filaments into a regular hexagon, and drawing the regular hexagon into a regular hexagon secondary composite optical fiber filament with a third preset side length; and arranging a plurality of orthohexagonal secondary composite optical fibers into an orthohexagonal screen section with a fourth preset side length, and performing melt pressing on the orthohexagonal screen section to obtain an optical fiber panel screen section with a preset diameter. The embodiment of the invention can reduce the optical fiber quality problem caused by the optical fiber screen section structure, and can be widely applied to the technical field of optical fiber preparation.

Description

Technical Field

[0001] The present invention relates to the technical field of optical fiber preparation, and in particular to a method for preparing an optical fiber image transmission element. Background Art

[0002] Fiber optic image transmission components refer to components that can transmit images from one end to the other end in which optical fibers are arranged according to certain rules. Since the size of a single optical fiber required by fiber optic components is generally 4μm or 6μm, or even smaller, it is generally necessary to arrange and draw the optical fiber strands multiple times.

[0003] At present, in the related art, the manufacturing method of the optical fiber composite structure of the optical fiber image transmission element, refer to 1 (a), generally, the core glass P1 and the cladding glass P2 are combined and heated and softened in a heating furnace, and then drawn and shrunk to form a single optical fiber; refer to 1 (b), the optical fiber is then arranged in a regular hexagon to form a primary composite rod and a primary composite optical fiber is drawn; refer to 1 (c), after the primary composite optical fiber is drawn, the primary composite optical fiber is arranged in a regular hexagon to form a secondary composite rod and a secondary composite optical fiber is drawn; the drawn secondary composite optical fiber is cut to a fixed length, and finally the secondary composite optical fiber is arranged in a regular hexagon to form a screen segment. The screen segment can be processed into various optical fiber image transmission elements after hot melt pressing.

[0004] When arranging the secondary composite rods, since the monofilaments are round, when the primary composite wires are closely matched with the primary composite wires, the arrangement direction is 4° higher than the horizontal direction, not a horizontal array, see Figure 2 The outer periphery of the arranged secondary composite rods is a serrated hexagon, see Figure 3 Similarly, the secondary composite wire is also a hexagon with a serrated outer surface.

[0005] During the arrangement process, the primary multifilament is angled downward, and there is an angle difference of 4° between the wires, which requires a very high technical level for arranging the secondary rods; at the same time, since the outer periphery of the secondary composite wire is serrated, the secondary composite wire and the secondary composite wire serrations are required to be tightly matched when arranging the screen, refer to 4 (a), which has a high level of size and arrangement for the secondary composite wire. Otherwise, the serrations are easily misaligned when arranging the screen, refer to 4 (b), or the serrations are at the top angle, refer to 4 (c).

[0006] When structural problems such as secondary multifilament sawtooth misalignment or sawtooth angle apex angle appear in the screen segment, during optical fiber melting and pressing, the pressure on the optical fiber at the location where the structural problem occurs in the screen segment is greater than that of a normal structure, and the optical fiber is prone to breakage, resulting in quality problems such as black fibers and black spots. Summary of the invention

[0007] In view of this, in order to solve one of the above problems, an embodiment of the present invention aims to provide a method for preparing an optical fiber imaging element to reduce optical fiber quality problems caused by the optical fiber screen segment structure.

[0008] An embodiment of the present invention provides a method for preparing an optical fiber image transmission element, comprising:

[0009] Obtaining a single optical fiber filament, arranging a plurality of the single optical fiber filaments into a parallelogram, and filling the gaps of the parallelogram with absorption filaments and filling filaments; an inner angle of the parallelogram is a preset angle;

[0010] Drawing the parallelogram into a parallelogram primary composite optical fiber filament with a first preset side length and a second preset side length; wherein the first preset side length is greater than or less than the second preset side length;

[0011] Arranging a plurality of the parallelogram-shaped primary composite optical fiber filaments into a regular hexagon, and drawing the regular hexagon into a regular hexagonal secondary composite optical fiber filament with a third preset side length;

[0012] A plurality of the regular hexagonal secondary composite optical fiber filaments are arranged into a regular hexagonal screen segment with a fourth preset side length, and the regular hexagonal screen segment is melt-pressed to obtain an optical fiber panel screen segment with a preset diameter.

[0013] Optionally, arranging the plurality of single optical fibers into a parallelogram comprises:

[0014] A plurality of the single optical fibers are arranged along two directions according to a preset ratio to form a parallelogram; the angle between the two directions is 120°, and the preset ratio is greater than or less than 1.

[0015] Optionally, the step of drawing the parallelogram into a parallelogram primary composite optical fiber filament with a first preset side length and a second preset side length comprises:

[0016] The parallelogram is heated to a first preset temperature until it softens, and the softened parallelogram is drawn into a parallelogram primary composite optical fiber filament with a first preset side length and a second preset side length.

[0017] Optionally, the preset angle is 120°, and the step of arranging a plurality of the parallelogram-shaped primary composite optical fiber filaments into a regular hexagon includes:

[0018] A plurality of the parallelogram-shaped primary composite optical fiber filaments are arranged in three directions of 0°, 120° and 240° to form a regular hexagon.

[0019] Optionally, the step of drawing the regular hexagon into a regular hexagonal secondary composite optical fiber filament with a third preset side length comprises:

[0020] The regular hexagon is heated to a second preset temperature until it softens, and the softened regular hexagon is drawn into a regular hexagonal secondary composite optical fiber filament with a third preset side length.

[0021] Optionally, the step of melting and pressing the regular hexagonal screen segment to obtain a fiber panel screen segment of a preset diameter includes:

[0022] The regular hexagonal screen segment is heated to a third preset temperature in a vacuum environment, and a preset pressure is applied to make the optical fiber shrinkage rate reach a preset requirement, thereby obtaining an optical fiber panel screen segment with a preset diameter.

[0023] Optionally, the vacuum degree of the vacuum environment is above -0.08 MPa.

[0024] Optionally, the preset pressure ranges from 6 to 12 MPa.

[0025] Optionally, the optical fiber shrinkage rate ranges from 3-8%.

[0026] Optionally, the single optical fiber is prepared by the following method:

[0027] Cleaning and drying a core glass rod of a first diameter and a skin glass tube of a second inner diameter respectively; the second inner diameter is larger than the first diameter;

[0028] The core glass rod is placed into the sheath glass tube and drawn into a round single optical fiber with a third diameter.

[0029] The implementation of the embodiment of the present invention includes the following beneficial effects: in this embodiment, a plurality of single optical fiber filaments are first arranged into a parallelogram, and the parallelogram is drawn into a parallelogram primary composite optical fiber filament with a first preset side length and a second preset side length, and then a plurality of parallelogram primary composite optical fiber filaments are arranged into a regular hexagon, and the regular hexagon is drawn into a regular hexagon secondary composite optical fiber filament with a third preset side length. The primary composite optical fiber filament adopts a parallelogram arrangement structure, so that the six faces of the secondary composite optical fiber filament have no serrations protruding or misaligned, reducing the peripheral serration structure of the secondary composite optical fiber filament, thereby reducing the optical fiber quality problems caused by the optical fiber screen segment structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the structure of a single optical fiber, a primary composite optical fiber and a secondary composite optical fiber in the related art;

[0031] Figure 2 It is a structural schematic diagram of a primary composite optical fiber arrangement in the related art;

[0032] Figure 3 It is a structural schematic diagram of a secondary composite optical fiber arrangement in the related art;

[0033] Figure 4 It is a schematic diagram of the structure of several secondary composite optical fiber filament arrangements in the related art;

[0034] Figure 5 It is a schematic flow chart of the steps of a method for preparing an optical fiber image transmission element provided by an embodiment of the present invention;

[0035] Figure 6 It is a structural schematic diagram of a primary composite optical fiber arrangement provided by an embodiment of the present invention;

[0036] Figure 7 It is a structural schematic diagram of an optical fiber screen segment provided by an embodiment of the present invention;

[0037] Figure 8 It is a structural schematic diagram of a secondary composite optical fiber filament arrangement provided by an embodiment of the present invention;

[0038] Fig. 9 It is a schematic diagram of the structure of another optical fiber screen segment provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0039] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The step numbers in the following embodiments are only provided for the convenience of explanation and description, and the order between the steps is not limited in any way. The execution order of each step in the embodiment can be adaptively adjusted according to the understanding of those skilled in the art.

[0040] like Figure 5 As shown, an embodiment of the present invention provides a method for preparing an optical fiber image transmission element, comprising:

[0041] S100, obtaining single optical fiber filaments, arranging a plurality of single optical fiber filaments into a parallelogram, and filling the gaps of the parallelogram with absorption filaments and filling filaments; an inner angle of the parallelogram is a preset angle.

[0042] A single optical fiber includes a core glass rod with a high refractive index and a cladding glass rod with a low refractive index. The single optical fiber can fully reflect light and has light transmission performance. One internal angle of the parallelogram is a preset angle. The number of single optical fibers on two adjacent sides of the parallelogram is determined according to the actual application, and this embodiment does not impose any specific restrictions. The absorption wire is used to absorb stray light, and the filling wire is used to fill the gap. The position and proportion of the absorption wire and the filling wire can be adjusted according to the contrast requirements of different products. The number of the absorption wire and the filling wire is determined according to the actual application, and this embodiment does not impose any specific restrictions. See Figure 6 , P3 represents a single optical fiber, P4 represents a black absorption fiber, and P5 represents a white filling fiber. It should be noted that the preset angle includes but is not limited to 120°.

[0043] S200, drawing a parallelogram into a parallelogram primary composite optical fiber filament with a first preset side length and a second preset side length; the first preset side length is greater than or less than the second preset side length.

[0044] The number of single optical fiber filaments in two adjacent directions of the parallelogram is different. Therefore, after the parallelogram is drawn, the length of the primary composite optical fiber filament in the parallelogram in two adjacent directions is also different. It should be noted that the first preset side length and the second preset side length are determined according to actual applications, and this embodiment does not impose specific restrictions.

[0045] S300, arranging a plurality of parallelogram-shaped primary composite optical fiber filaments into a regular hexagon, and drawing the regular hexagon into a regular hexagonal secondary composite optical fiber filament with a third preset side length.

[0046] Specifically, a regular hexagon can be divided into a plurality of parallelograms, and then the parallelograms are arranged according to the pre-divided positions to form a regular hexagon, and the regular hexagon is drawn into a regular hexagonal secondary composite optical fiber with a third preset side length. It should be noted that the third preset side length is determined according to actual application and is not specifically limited in this embodiment.

[0047] S400, arranging a plurality of regular hexagonal secondary composite optical fiber filaments into regular hexagonal screen segments with a fourth preset side length, and melting and pressing the regular hexagonal screen segments to obtain optical fiber panel screen segments with a preset diameter.

[0048] See also Figure 7 , P5 represents a regular hexagonal secondary composite optical fiber filament, a plurality of regular hexagonal secondary composite optical fiber filaments are arranged into a regular hexagonal screen segment with a fourth preset side length, and the regular hexagonal screen segment is melt-pressed to obtain an optical fiber panel screen segment with a preset diameter. It should be noted that the physical conditions of the melt-pressing are determined according to the actual application, and this embodiment does not impose specific restrictions.

[0049] Optionally, the single optical fiber is prepared by the following method:

[0050] S101, washing and drying a core glass rod of a first diameter and a skin glass tube of a second inner diameter respectively; the second inner diameter is larger than the first diameter;

[0051] S102, placing the core glass rod into the skin glass tube, and drawing it into a round single optical fiber with a third diameter.

[0052] It should be noted that the first diameter, the second inner diameter and the third diameter are determined according to actual applications, and are not specifically limited in this embodiment. First, the core glass rod of the first diameter and the skin glass tube of the second inner diameter are cleaned and dried respectively, and the cleaning may include alcohol cleaning and water cleaning, and the drying may include low-temperature drying, etc.; the second inner diameter is larger than the first diameter, and the core glass rod is placed in the skin glass tube, heated, and drawn into a round single optical fiber of the third diameter.

[0053] Optionally, a plurality of single optical fiber filaments are arranged into a parallelogram, including:

[0054] A plurality of single optical fibers are arranged along two directions according to a preset ratio to form a parallelogram; the angle between the two directions is 120°, and the preset ratio is greater than or less than 1.

[0055] The two directions form two adjacent sides of a parallelogram, and the number of single optical fiber filaments in the first direction and the second direction are not equal. The reason is that if the number is equal, the primary composite rod is prism-shaped. When drawing the prism-shaped primary composite wire, the prism-shaped wire is easy to twist and twist the wire, which affects the size and structure of the secondary composite wire. For example, the ratio of the number of single optical fiber filaments along the two directions in the parallelogram is 2:1.

[0056] Optionally, drawing the parallelogram into a parallelogram primary composite optical fiber filament with a first preset side length and a second preset side length comprises:

[0057] The parallelogram is heated to a first preset temperature until it softens, and the softened parallelogram is drawn into a parallelogram primary composite optical fiber filament with a first preset side length and a second preset side length.

[0058] Specifically, the parallelogram primary composite optical fiber rod is hung on a drawing device and heated to a first preset temperature until the optical fiber softens and can be stretched and deformed, and then drawn into a thin parallelogram primary composite optical fiber filament. It should be noted that the first preset temperature can be determined according to the softening temperature of the optical fiber.

[0059] Optionally, the preset angle is 120°, and a plurality of parallelogram-shaped primary composite optical fiber filaments are arranged into a regular hexagon, including:

[0060] A plurality of parallelogram-shaped primary composite optical fibers are arranged in three directions of 0°, 120°, and 240° to form a regular hexagon.

[0061] See also Figure 8The drawn parallelogram primary composite optical fiber filaments are arranged in three directions of 0°, 120°, and 240° based on the plane rectangular coordinate axis X-axis to obtain regular hexagonal secondary composite rods. In this arrangement, the parallelogram primary composite filaments are closely matched with the parallelogram primary composite filaments, and there is no serrated structure on the periphery of the secondary composite rod.

[0062] Optionally, drawing the regular hexagon into a regular hexagonal secondary composite optical fiber filament with a third preset side length comprises:

[0063] The regular hexagon is heated to a second preset temperature until it softens, and the softened regular hexagon is drawn into a regular hexagonal secondary composite optical fiber filament with a third preset side length.

[0064] Specifically, the regular hexagonal secondary composite optical fiber filament rod is hung on the drawing device and heated to a second preset temperature until the optical fiber softens and can be stretched and deformed, and then drawn into a thin regular hexagonal secondary composite optical fiber filament. It should be noted that the second preset temperature can be determined according to the softening temperature of the optical fiber.

[0065] Optionally, the regular hexagonal screen segment is melt-pressed to obtain a fiber panel screen segment of a preset diameter, including:

[0066] The regular hexagonal screen segment is heated to a third preset temperature in a vacuum environment, and a preset pressure is applied to make the optical fiber shrinkage rate reach a preset requirement, thereby obtaining an optical fiber panel screen segment with a preset diameter.

[0067] Optionally, the vacuum degree of the vacuum environment is above -0.08 MPa.

[0068] Optionally, the preset pressure ranges from 6-12 MPa.

[0069] Optionally, the optical fiber shrinkage ratio ranges from 3-8%.

[0070] In a specific embodiment, the drawn regular hexagonal secondary composite optical fiber filaments are arranged into hexagonal screen segments, and are subjected to vacuum high-temperature heating in a melting furnace, and pressure is applied. The corresponding third preset temperature is set according to the softening temperature of the glass. The third preset temperature is 20-50°C higher than the softening point temperature of the optical fiber to soften the optical fiber. The vacuum degree is ensured to be above -0.08MPa, and the pressure is applied between 6-12MPa to make the regular hexagonal secondary composite optical fiber filaments bond to each other. During the drawing process, the optical fiber shrinkage rate reaches 3-8% to form an integrated optical fiber screen segment.

[0071] The following is a specific example to illustrate the preparation process of the optical fiber imaging element.

[0072] S1. Single optical fiber drawing: Select a core glass rod with a diameter of 28mm and a skin glass tube with an inner diameter of 29mm and a wall thickness of 3mm for cleaning and drying. Put the core glass rod into the skin glass tube, and then clamp the combined tube and rod on a wire drawing machine for heating and drawing to draw a round single optical fiber with a diameter of 2.8mm.

[0073] S2. Arrangement and drawing of primary composite optical fiber rods: Arrange single optical fiber filaments into a parallelogram primary composite optical fiber rod, the ratio of the number of single optical fibers on the long side and short side of the parallelogram is 2:1, of which there are 14 long sides and 7 short sides. The long side size of the arranged primary composite optical fiber rod is 39.2mm and the short side is 19.6mm, and the corresponding black absorption filaments and white filling filaments are inserted into the middle pores as required. Hang the parallelogram primary composite optical fiber rod on the drawing equipment, heat and draw it into a parallelogram primary composite optical fiber filament with a long side of 2mm and a short side of 1mm.

[0074] S3. Arrangement and drawing of secondary composite optical fiber rods: Arrange the drawn parallelogram primary composite optical fiber filaments in three directions of 0°, 120°, and 240° to form regular hexagonal secondary composite optical fiber rods with a side length of 20 mm, and hang the secondary composite optical fiber rods on the drawing equipment, heat and draw them into regular hexagonal secondary composite optical fiber filaments with a side length of 0.87 mm.

[0075] S4. Screen segment arrangement and melting and pressing: Arrange the drawn regular hexagonal secondary composite optical fiber with a side length of 0.87 mm into regular hexagonal screen segments with a side length of 19.14 mm. The specific diagram of the screen segment structure is as follows: Fig. 9 As shown. In a melting furnace, vacuum high-temperature heating is performed and pressure is applied to shrink the optical fiber by 4-5%. The regular hexagonal secondary composite optical fiber filaments are bonded to each other under high temperature and pressure to form an integrated optical fiber screen segment, and the final optical fiber panel screen segment with a single optical fiber diameter of 6μm is obtained.

[0076] The implementation of the embodiment of the present invention includes the following beneficial effects: in this embodiment, a plurality of single optical fiber filaments are first arranged into a parallelogram, and the parallelogram is drawn into a parallelogram primary composite optical fiber filament with a first preset side length and a second preset side length, and then a plurality of parallelogram primary composite optical fiber filaments are arranged into a regular hexagon, and the regular hexagon is drawn into a regular hexagon secondary composite optical fiber filament with a third preset side length. The primary composite optical fiber filament adopts a parallelogram arrangement structure, so that the six faces of the secondary composite optical fiber filament have no serrations protruding or misaligned, reducing the peripheral serration structure of the secondary composite optical fiber filament, thereby reducing the optical fiber quality problems caused by the optical fiber screen segment structure.

[0077] The above is a specific description of the preferred implementation of the present invention, but the invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A method for preparing an optical fiber image transmission element, characterized in that: include: Obtaining a single optical fiber filament, arranging a plurality of the single optical fiber filaments into a parallelogram, and filling the gaps of the parallelogram with absorption filaments and filling filaments; an inner angle of the parallelogram is a preset angle; Drawing the parallelogram into a parallelogram primary composite optical fiber filament with a first preset side length and a second preset side length; wherein the first preset side length is greater than or less than the second preset side length; Arranging a plurality of the parallelogram-shaped primary composite optical fiber filaments into a regular hexagon, and drawing the regular hexagon into a regular hexagonal secondary composite optical fiber filament with a third preset side length; A plurality of the regular hexagonal secondary composite optical fiber filaments are arranged into a regular hexagonal screen segment with a fourth preset side length, and the regular hexagonal screen segment is melt-pressed to obtain an optical fiber panel screen segment with a preset diameter.

2. The preparation method according to claim 1, characterized in that: The step of arranging a plurality of the single optical fibers into a parallelogram comprises: A plurality of the single optical fibers are arranged along two directions according to a preset ratio to form a parallelogram; the angle between the two directions is 120°, and the preset ratio is greater than or less than 1.

3. The preparation method according to claim 1, characterized in that: The method of drawing the parallelogram into a parallelogram primary composite optical fiber filament with a first preset side length and a second preset side length comprises: The parallelogram is heated to a first preset temperature until it softens, and the softened parallelogram is drawn into a parallelogram primary composite optical fiber filament with a first preset side length and a second preset side length.

4. The preparation method according to claim 1, characterized in that: The preset angle is 120°, and the method of arranging a plurality of the parallelogram-shaped primary composite optical fibers into a regular hexagon includes: A plurality of the parallelogram-shaped primary composite optical fiber filaments are arranged in three directions of 0°, 120° and 240° to form a regular hexagon.

5. The preparation method according to claim 1, characterized in that: The method of drawing the regular hexagon into a regular hexagonal secondary composite optical fiber filament with a third preset side length comprises: The regular hexagon is heated to a second preset temperature until it softens, and the softened regular hexagon is drawn into a regular hexagonal secondary composite optical fiber filament with a third preset side length.

6. The preparation method according to claim 1, characterized in that: The method of melting and pressing the regular hexagonal screen segment to obtain a fiber panel screen segment of a preset diameter comprises: The regular hexagonal screen segment is heated to a third preset temperature in a vacuum environment, and a preset pressure is applied to make the optical fiber shrinkage rate reach a preset requirement, thereby obtaining an optical fiber panel screen segment with a preset diameter.

7. The preparation method according to claim 6, characterized in that: The vacuum degree of the vacuum environment is above -0.08 MPa.

8. The preparation method according to claim 6, characterized in that: The preset pressure ranges from 6 to 12 MPa.

9. The preparation method according to claim 6, characterized in that: The optical fiber shrinkage rate ranges from 3 to 8%.

10. The preparation method according to claim 1, characterized in that: The single optical fiber is prepared by the following method: Cleaning and drying a core glass rod of a first diameter and a skin glass tube of a second inner diameter respectively; the second inner diameter is larger than the first diameter; The core glass rod is placed into the sheath glass tube and drawn into a round single optical fiber with a third diameter.

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