Flexible optical fiber bundle polishing clamp for medical imaging and data transmission

Abstract

The invention relates to a flexible optical fiber bundle polishing clamp for medical imaging and data transmission, which comprises a clamp main body, a plurality of first through holes are formed in the clamp main body, and the first through holes penetrate through the upper end surface and the lower end surface of the clamp main body; a second through hole is correspondingly formed in one side of each first through hole and penetrates through the inner wall of the first through hole and the outer wall of the clamp body. The clamp is used for polishing the flexible optical fiber bundle for medical imaging and data transmission, and has the advantages of being low in breakage rate of the optical fiber bundle and high in polishing quality and polishing efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of image fiber bundle processing equipment, and particularly to a flexible image fiber bundle polishing clamp for medical imaging and data transmission. BACKGROUND

[0002] In the field of optical fiber data transmission and medical imaging technology, the performance of high-resolution image fiber bundle as the core transmission element directly determines the signal transmission quality and imaging clarity. The 10,000-pixel image fiber bundle is prepared by tightly arranging 10,000 image fiber filaments and then performing a secondary drawing process. The diameter of the image fiber bundle is only 0.35-5 mm, and the length is 30-190 mm. The high-density arrangement structure of the multiple fiber filaments makes the image fiber bundle prone to filament breakage or edge damage during polishing due to uneven stress.

[0003] In the prior art, the fixing in the polishing of the image fiber bundle mainly adopts a metal clamp mechanical clamping or ultraviolet glue bonding fixing mode. The metal clamp mechanical clamping fixing mode has the following defects: it is difficult to accurately control the clamping force, and when the clamping force exceeds 0.5 N, the edge filaments of the image fiber bundle are easily broken; the contact area between the clamp and the image fiber bundle is small, and during the polishing process, the unclamped area of the image fiber bundle is prone to vibration, resulting in uneven polishing surface and surface roughness Ra value exceeding 0.2 ; the thermal expansion coefficient of the metal clamp is greatly different from that of the optical fiber material, the thermal expansion coefficient of the metal clamp is 10-20×10 -6 / ℃, and the thermal expansion coefficient of the optical fiber material is 5-8×10 -6 / ℃, and in the polishing process, the temperature can reach 40-60℃ due to friction, thereby generating thermal stress and causing the internal structure of the image fiber bundle to loosen.

[0004] Although the ultraviolet glue bonding fixing mode can achieve full wrapping fixing, the ultraviolet glue layer has a high hardness after curing, the Shore hardness D is 60-70, the wear rate of the ultraviolet glue and the image fiber bundle is inconsistent during the polishing process, resulting in a step difference of 2-3 mm on the end face of the image fiber bundle; and the ultraviolet glue is prone to aging in a high-temperature environment, and when the temperature exceeds 50℃, the bonding strength decreases by more than 30%, which cannot guarantee the stability during long-time polishing; in addition, the ultraviolet glue removal process is complex, and the adhesive layer fragments are easily attached to the end face of the optical fiber, affecting the optical performance.

[0005] According to industry data statistics, when the existing fixing mode is used to polish the 10,000-pixel flexible image fiber bundle, the filament breakage rate is as high as 70%, and the filament fiber body deformation rate is 30%; and the end face after polishing has a qualified rate (surface roughness Ra≤0.1 , flatness≤1 With a breakage rate of less than 60%, the application and promotion of high-resolution fiber bundles in high-end data transmission and medical imaging are severely restricted. Therefore, developing a specialized fixture that can achieve efficient and precise fixation, significantly reduce the breakage rate, and improve polishing quality has become an urgent technical problem to be solved in this field. Summary of the Invention

[0006] The main objective of this invention is to overcome the defects of high breakage rate, poor polishing quality, and low efficiency caused by the fixing method during the polishing process of flexible optical fiber bundles, and to provide a flexible optical fiber bundle polishing fixture for medical imaging and data transmission.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A flexible fiber bundle polishing fixture for medical imaging and data transmission includes a fixture body with a plurality of first through holes penetrating the upper and lower end faces of the fixture body; a second through hole is provided on one side of each first through hole, and the second through hole penetrates the inner wall of the first through hole and the outer wall of the fixture body.

[0008] The inner wall of the first through hole is provided with a buffer layer, the buffer layer having a Shore hardness of A 50-60 and a coefficient of friction ≤0.05.

[0009] The buffer layer is a polytetrafluoroethylene (PTFE) buffer layer; the thickness of the PTFE buffer layer is 2.5-4 mm.

[0010] The clamp body has a water inlet in the middle, and the side wall of the water inlet has a plurality of third through holes. The third through holes penetrate the side wall of the water inlet and the inner wall of the first through hole. Each first through hole is connected to the water inlet through at least one third through hole.

[0011] The diameter of the second through hole is 2-5mm. Two or more second through holes are provided at intervals along the height direction of the corresponding first through hole. The second through hole is provided with internal threads for screws to pass through. The screws are used to fix the collection sleeve in the first through hole. Two or more third through holes are provided at intervals along the height direction of the water inlet.

[0012] The fixture body is made of 304 stainless steel and is a cylinder, cube, hexagon, or triangular prism. The outer diameter of the cylinder is 80-120mm, and the height is 10-40mm. The diameter of the first through hole is 8-15mm. The center distance between the first through hole and the center distance between the first through hole and the center of the fixture body is equal. The outer surface of the fixture body is polished and anodized, and the surface roughness Ra is 0.03-0.1. .

[0013] The present invention also provides a method for polishing an optical fiber bundle using a flexible optical fiber bundle polishing fixture for medical imaging and data transmission, comprising the following steps: Paraffin encapsulation: Select fiber bundles of uniform specifications and insert them into the collection sleeve. After the fiber bundles are tightly arranged, they completely fill the collection sleeve. Use paraffin to evenly fill the gaps between the fiber bundles in the collection sleeve. The optical fiber bundle includes single optical fiber bundles and multifiber optical fiber bundles; Inserting the fiber bundle multifiber: Select a single fiber bundle with a diameter equivalent to that of the first through hole and insert it into the first through hole. Use hot melt adhesive to fix the fiber bundle to the first through hole, or insert a collection sleeve containing the fiber bundle into the first through hole, fix the collection sleeve to the first through hole with hot melt adhesive, and press in the upper and lower pressure rings to fix the collection sleeve in the first through hole again; when the inner wall of the first through hole is provided with a buffer layer, tighten the collection sleeve with the screws on the side. Polishing process: The fixture body filled with optical fiber bundles is placed into a polishing machine to polish the upper and lower end faces of the optical fiber bundles. The polishing process includes: first, placing the fixture on the polishing disc, dripping polishing liquid into the polishing disc, then rotating the polishing disc for coarse polishing, followed by fine polishing. During the polishing process, the water inlet is connected to the cooling water pipe through the cooling water valve. When the polishing disc starts running, the cooling water valve is opened at the same time to inject cooling water into the fixture body through the water inlet, so that the working temperature of the fixture body is within the preset temperature range. After polishing one end face of the fiber bundle multifilament according to the polishing process, when using hot melt adhesive for fixation, first heat the polishing disc to 80-90℃ to melt the hot melt adhesive, then take out the single fiber bundle multifilament, flip it over, and fix it to the first through hole with hot melt adhesive. Then, complete the polishing process of the other end face of the fiber bundle multifilament according to the polishing process. Alternatively, after the hot melt adhesive melts, remove the upper and lower pressure rings, take out the collection tube, clean the remaining hot melt adhesive, flip the collection sleeve over and fix it back into the first through hole, and complete the polishing process of the other end face of the fiber bundle multifilament inside the collection sleeve. When using screws to fix the collecting sleeve, remove the screws, flip the collecting sleeve, fix the screws again, and complete the polishing process for the other end face of the fiber bundle multifilament inside the collecting sleeve. Post-processing: After polishing, turn off the polishing machine and remove the upper and lower pressure rings; rinse with clean water to remove the polishing liquid from the surface of the fixture body, and blow away the residual polishing liquid with compressed air; remove the fiber bundle multifilament after melting the paraffin wax; remove the residual paraffin wax from the end face of the fiber bundle multifilament.

[0014] The paraffin encapsulation includes a paraffin storage process, a temperature-controlled heating process, and a wax filling process; Paraffin wax is stored in a paraffin wax storage tank. The paraffin wax is heated to 60-80℃ using a temperature-controlled heating module of an electric heating furnace. After the paraffin wax is melted by holding it at this temperature for a certain period of time, the collecting sleeve is placed into the molten paraffin wax storage tank. The molten paraffin wax fills the gaps between the fiber bundle multifilaments in the collecting sleeve. The sleeve is left to stand for 10-20 minutes until the small air bubbles in the collecting sleeve are completely precipitated. Then, it is cooled until the paraffin wax begins to solidify. The collecting sleeve is then removed and allowed to cool naturally to room temperature. The excess length of the fiber bundle multifilaments is then cut to achieve the required size. The paraffin used is pathological grade paraffin with a melting point of 58-60℃, and the viscosity of the paraffin at 60℃ is 15-20 mPa·s. The inlet temperature of the cooling water is 20-30℃, the flow rate of the cooling water is 0.3-0.5L / min, and the preset temperature range is 20-30℃. In the post-processing, the paraffin wax is melted using hot water at 80-100℃.

[0015] The parameters for the polishing process include: the polishing disc of the polishing machine rotates at 100-140 r / min; the polishing pad on the polishing machine is made of polyurethane material with a hardness of Shore A 80; the polishing fluid is a cerium oxide suspension; and the coarse polishing uses a particle size of 80-200 μm. A cerium oxide suspension with a mass percentage concentration of 10-15% and a flow rate of 20 μg / min is used; the coarse polishing time is 120-180 minutes, and the fine polishing uses particles with a particle size of 0.25-5 μm. A cerium oxide suspension with a concentration of 10-15% and a flow rate of 20 d / min; the fine polishing time is 60-120 minutes.

[0016] The collection sleeve is a glass sleeve, a stainless steel sleeve, a polyvinyl chloride plastic sleeve, an acrylic sleeve, or a quartz sleeve. The fiber bundle multifilament is a 10,000-pixel flexible image transmission fiber bundle used for data transmission in the field of medical imaging.

[0017] By employing the above technical solution, the present invention has at least the following advantages: 1. Significantly reduced breakage rate: This invention achieves full-wrap uniform fixation of the fiber bundle by the clamp, ensuring no vibration of the fiber body during polishing, with a vibration amplitude ≤0.5. By using paraffin wax to fully encapsulate the fiber bundle, the force is uniform during the polishing process. Experiments have verified that the polishing breakage rate of a 10,000-pixel fiber bundle can be reduced from 60-70% in the existing technology to 13-25%.

[0018] 2. Significantly improved polishing quality: Precise end pressure control ensures no vibration or thermal deformation of the fiber during polishing, resulting in a surface roughness Ra≤0.08 on the polished rear face. It reached 0.06±0.01 Flatness ≤ 0.5 It can be controlled within 0.3±0.05. Within the range.

[0019] 3. Significantly improved polishing efficiency: The optimized fiber bundle clamping method and disassembly process can shorten the polishing time of 4,000 single fiber bundles from 30-40 hours to 4-6 hours. Combined with the rapid solidification (60℃ paraffin solidifies completely within 20 minutes at 25℃) and dissolution (dissolves within 3 minutes in 80℃ hot water) characteristics of paraffin, 4,000 fiber bundles can be polished in 8 hours a day, improving efficiency by 5-6 times.

[0020] 4. Improved Ease of Operation: The fixture of this invention adopts a modular design, including a cylindrical fixture main module, a multi-channel cooling module, and a side-opening quick-disassembly module. Combined with the various components, including upper and lower pressure rings, side-fastening screws, and a PTFE buffer layer, it allows for quick disassembly and replacement, reducing reliance on operational skills. This invention simplifies the fixing and disassembly process, achieving non-destructive handling.

[0021] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the flexible fiber bundle polishing fixture for medical imaging and data transmission provided in an embodiment of the present invention; Figure 2 This is a perspective structural diagram of a flexible fiber bundle polishing fixture for medical imaging and data transmission provided in an embodiment of the present invention.

[0023] In the diagram: 1-Clamp body, 2-First through hole, 3-Second through hole, 4-Third through hole, 5-Water inlet. Detailed Implementation

[0024] To further illustrate the technical means and effects adopted by the present invention to achieve its intended purpose, the specific implementation methods, structures, features, and effects of the present invention will be described in detail below with reference to the accompanying drawings and preferred embodiments. In the following description, different "embodiments" or "embodiments" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0025] like Figure 1 and Figure 2As shown, a flexible fiber bundle polishing fixture for medical imaging and data transmission includes a fixture body 1, on which a plurality of first through holes 2 are provided, the first through holes 2 penetrating the upper and lower end faces of the fixture body 1; a second through hole 3 is provided on one side of each first through hole 2, the second through hole 3 penetrating the inner wall of the first through hole 2 and the outer wall of the fixture body 1.

[0026] This invention features a first through-hole for holding the fiber bundle to be polished, and a second through-hole for holding screws that secure the fiber bundle and serving as an outlet channel for cooling water used during polishing. Using the fiber bundle clamping method of this invention, thousands of fibers can be secured simultaneously, enabling simultaneous polishing of multiple fibers, thereby reducing polishing time and improving polishing efficiency.

[0027] Preferably, the inner wall of the first through hole is provided with a buffer layer.

[0028] The buffer layer ensures that when in contact with the fiber optic bundle, it provides adequate friction to prevent the fiber optic bundle from detaching from the first through-hole, without causing scratches. This adequate friction prevents the fiber optic bundle from detaching from the first through-hole. When a collecting sleeve is inserted into the first through-hole, and the collecting sleeve is made of glass, the buffer layer also prevents the glass sleeve from cracking when the screws are used to fix it.

[0029] Preferably, the Shore hardness of the buffer layer is A 50-60, and the coefficient of friction is ≤0.05.

[0030] Preferably, the buffer layer is a polytetrafluoroethylene (PTFE) buffer layer; the thickness of the PTFE buffer layer is 2.5-4 mm.

[0031] When using screws to secure fiber optic bundles during polishing, employing a polytetrafluoroethylene (PTFE) buffer layer offers the following advantages: (1) Polytetrafluoroethylene has good buffering and shock absorption properties, which can effectively absorb the vibration generated during the polishing process, reduce the impact of vibration on the fiber bundle, prevent the fiber bundle from being damaged by vibration, and protect the structural integrity and transmission performance of the fiber bundle. (2) Polytetrafluoroethylene is inert to most chemicals and can resist the corrosion of chemical reagents that may be encountered during the polishing process, such as acids, alkalis, solvents, etc., protecting the fiber bundle and screws from corrosion and extending their service life. (4) Polytetrafluoroethylene has an extremely low coefficient of friction, which can reduce the friction between the screw and the fiber bundle and prevent the surface of the fiber bundle from being scratched due to excessive friction during the fastening process. (5) Generally, the larger the diameter of the optical fiber bundle, the thicker the required PTFE buffer layer can be appropriately increased. Thicker optical fiber bundles require a larger buffer area and buffer amount when tightening to evenly distribute the pressure and avoid excessive local pressure that could damage the optical fiber bundle.

[0032] Preferably, the clamp body 1 has a water inlet 5 in the middle, and the side wall of the water inlet 5 has a plurality of third through holes 4. The third through holes 4 penetrate the side wall of the water inlet 5 and the inner wall of the first through hole 2. Each first through hole 4 is connected to the water inlet 5 through at least one third through hole 4.

[0033] Cooling water is introduced into the fixture body through the water inlet to cool the fixture body.

[0034] Preferably, the diameter of the second through hole 3 is 2-5mm, and two or more second through holes 3 are provided at intervals along the height direction of the corresponding first through hole 2. The second through hole 3 is provided with an internal thread for a screw with an external thread to pass through. The screw is used to fix the collection sleeve in the first through hole 2. Two or more third through holes 4 are provided at intervals along the height direction of the water inlet 5.

[0035] The present invention provides a second through hole, which can serve as a cooling water outlet channel. The second through hole is evenly arranged around the main body of the fixture. Through the heat exchange of the cooling water, the heat generated during the polishing process is promptly discharged from the main body of the fixture, so that the working temperature of the fixture is stabilized within the range of 25-30℃.

[0036] Preferably, the fixture body is made of 304 stainless steel, and the fixture body is a cylinder, cube, hexagon, or triangular prism. The outer diameter of the cylinder is 60-150mm, the height is 20-50mm, and the diameter of the first through hole is 8-15mm. The center distance of the first through hole from the center distance of the fixture body is equal.

[0037] The main body of the fixture of this invention is preferably made of 304 stainless steel, with an overall cylindrical structure, an outer diameter of 104mm, a height of 30mm, and through holes of 12mm diameter on the upper and lower end faces, serving as the first through holes. The cylindrical body is adaptable to complex curved surfaces, and the cylindrical fixture rotates evenly on the polishing machine, avoiding polishing dead corners. The surface of the cylindrical fixture body is smooth, and the contact surface between the cylinder and the fiber bundle is uniform, with stable pressure transmission, which can reduce scratches, dents, and other defects on the surface of the fiber bundle. Using a cylindrical fixture body also has the advantages of low operation difficulty, uniform wear, and longer polishing disc life.

[0038] The polishing machine of this invention drives the polishing fixture to oscillate in a figure-eight pattern. To achieve the best polishing effect, the fixture body is preferably cylindrical, which is less likely to produce polishing dead corners. During the polishing process, burrs may be generated on the end face of the fiber bundle workpiece, or particles may fall into the polishing pad in the working environment, which will cause wear on the workpiece and thus cause scratches. The fixture body is made of stainless steel, which is heavy and has a smooth surface. During the polishing process, the addition of cooling water can ensure good contact between the workpiece and the polishing pad, avoiding the formation of pores during the polishing process that could lead to workpiece breakage.

[0039] This invention also provides a method for polishing an optical fiber bundle using the aforementioned flexible optical fiber bundle polishing fixture for medical imaging and data transmission. Paraffin encapsulation: Select fiber bundle multifilaments of uniform specifications and insert them into the collection sleeve. After the fiber bundle multifilaments are tightly arranged, they completely fill the collection sleeve. Use paraffin to evenly fill the gaps between the fiber bundle multifilaments in the collection sleeve. The fiber bundle includes fiber bundle monofilaments and fiber bundle multifilaments. A fiber bundle monofilament is a fiber filament drawn in one operation, while a fiber bundle multifilament is formed by arranging the drawn fiber filaments in one operation and then drawing them again. This invention can be used to polish fiber bundle multifilaments or fiber bundle monofilaments.

[0040] Inserting the fiber bundle multifilament: Select a single fiber bundle multifilament with a diameter equivalent to that of the first through hole and insert it into the first through hole. Use hot melt adhesive to fix the fiber bundle to the first through hole, or insert the collection sleeve containing the fiber bundle into the first through hole, fix the collection sleeve to the first through hole with hot melt adhesive, and press in the upper and lower pressure rings to fix the collection sleeve in the first through hole again; when the inner wall of the first through hole is provided with a buffer layer, tighten the collection sleeve with the screws on the side. Polishing: The fixture body containing the fiber bundle is placed in a polishing machine to polish the upper and lower end faces of the fiber bundle multifilaments. The polishing process includes: first, placing the fixture on the polishing disc, and then dripping 80-200 microns of material into the polishing disc. Apply cerium oxide polishing slurry, then rotate the polishing disc for rough polishing for 2-3 hours, followed by polishing with a particle size of 0.25-5. Fine polishing with cerium oxide polishing slurry for 60-120 minutes; during the polishing process, the water inlet is connected to the cooling water pipe through the cooling water valve. When the polishing disc starts running, the cooling water valve is opened at the same time to inject cooling water into the fixture body through the water inlet, so that the working temperature of the fixture body is within the preset temperature range. The rough polishing of this invention is to quickly remove excess material from the end face of the optical fiber bundle, correct the flatness deviation of the end face, and lay the foundation for fine polishing. Cerium oxide suspension with larger particle size is usually selected. It is necessary to quickly remove the initial unevenness, burrs or cutting marks on the end face in a relatively long time of 2-3 hours to shorten the subsequent fine polishing cycle. Microscopic devices are usually used to check whether the end face of the workpiece after rough polishing is smooth and whether it can meet the requirement of no dark spots. If it does not meet the requirement, rough polishing needs to be performed again.

[0041] The fine polishing of this invention further reduces end-face roughness and improves surface smoothness, ensuring that the optical performance required for medical imaging is met. Using a finer-particle polishing fluid can reduce scratches on the fiber filaments and achieve fine polishing. The fine polishing time is usually shorter than the coarse polishing time, ranging from 60 to 120 minutes. It needs to be precisely controlled to avoid over-polishing and fiber filament loss. After fine polishing is completed, the polished end face is checked with a microscope to see if it is smooth enough to meet the requirements. If it does not meet the requirements, it needs to be polished again until the requirements are met.

[0042] After polishing one end face of the fiber bundle according to the polishing process, when using hot melt adhesive for fixation, first heat the polishing disc to 80-90℃ to melt the hot melt adhesive, then take out the single fiber bundle multifilament, flip it over, and fix it to the first through hole with hot melt adhesive. Then, complete the polishing process of the other end face of the fiber bundle multifilament according to the polishing process. Alternatively, after the hot melt adhesive melts, remove the upper and lower pressure rings, take out the collection sleeve, clean the remaining hot melt adhesive, flip the collection sleeve over and fix it back into the first through hole, and complete the polishing process of the other end face of the fiber bundle inside the collection sleeve. When using screws to fix the collecting sleeve, remove the screws, flip the collecting sleeve, fix the screws again, and complete the polishing process for the other end face of the fiber bundle multifilament inside the collecting sleeve. Post-processing: After polishing, turn off the polishing machine and remove the upper and lower pressure rings; rinse with clean water to remove the polishing liquid from the surface of the fixture, and blow away the residual polishing liquid with compressed air; remove the fiber bundle multifilament after melting the paraffin wax; remove the residual paraffin wax from the end face of the fiber bundle multifilament.

[0043] The paraffin encapsulation includes a paraffin storage process, a temperature-controlled heating process, and a wax filling process; Paraffin wax is stored in a paraffin wax storage tank and heated to 60-80℃ using a temperature-controlled heating module with constant temperature control of an induction cooker. After the paraffin wax melts, a glass sleeve containing fiber bundles is placed into the molten paraffin wax, allowing the molten paraffin wax to fill the gaps between the fiber bundles in the collection sleeve. When the wax pouring begins, air bubbles will emerge from the pores in the collection sleeve. Let it stand for 10-20 minutes until all the internal air bubbles are completely expelled, then stop the wax pouring. The standard for stopping the wax pouring is that no air bubbles emerge from the collection sleeve within 10-20 minutes, indicating that the liquid paraffin wax has filled the entire pore. At this point, the wax pouring can be stopped. Then, the collection sleeve is cooled until the paraffin wax begins to solidify. At this time, the collection sleeve is still in the molten liquid paraffin wax. The collection sleeve is removed and allowed to cool naturally to room temperature. The excess length of the fiber bundle is then cut to the required size. The paraffin used is pathological grade paraffin with a melting point of 58-60℃, and the viscosity of the paraffin at 60℃ is 15-20 mPa·s. The inlet temperature of the cooling water is 20-30℃, the flow rate of the cooling water is 0.3-0.5L / min, and the preset temperature range is 20-30℃. In the post-processing, the paraffin wax is melted using hot water at 80-100℃.

[0044] The parameters for the polishing process include: the polishing disc rotation speed of the polishing machine is 100-140 r / min; the polishing pad in the polishing machine is made of polyurethane material with a hardness of Shore A 80; the polishing fluid is a cerium oxide suspension; and the coarse polishing uses a particle size of 80-200 μm. A cerium oxide suspension with a mass percentage concentration of 10-15% and a flow rate of 20 μg / min is used; the coarse polishing time is 120-180 minutes, and the fine polishing uses particles with a particle size of 0.25-5 μm. A cerium oxide suspension with a concentration of 10-15% and a flow rate of 20 d / min; the polishing time for fine polishing is 60-120 minutes.

[0045] The main function of the polishing pad of this invention is to carry the polishing liquid, transmit the cutting force, and protect the workpiece surface. The polyurethane polishing pad has a flat surface, which can make the abrasive evenly distributed and avoid scratching the workpiece surface.

[0046] Preferably, the collecting sleeve is a glass sleeve, a stainless steel sleeve, a polyvinyl chloride plastic sleeve, an acrylic sleeve, or a quartz sleeve. The fiber bundle is a 10,000-pixel flexible image transmission fiber bundle used for data transmission in the field of medical imaging.

[0047] The preferred collecting sleeve is a glass sleeve with a smooth inner wall, suitable for tightly packed fiber bundles. This avoids positional shifts or surface damage during fiber bundle arrangement caused by a rough inner wall. The glass sleeve material's hardness matches the fiber bundle, minimizing scratches on the fiber bundle end faces during polishing and protecting the core transmission area. The smooth inner wall and high dimensional accuracy of the glass sleeve allow for precise fiber bundle positioning, preventing shifts during polishing and ensuring end face flatness. The moderate thermal conductivity of glass prevents heat buildup during polishing, reducing the risk of fiber bundle deformation due to high temperatures. Furthermore, the glass's strong chemical stability and resistance to polishing agents prevent contamination of the fiber bundle end faces or impact on polishing results, resulting in a long service life.

[0048] The fiber bundle is a 10,000-pixel flexible image transmission fiber bundle used for data transmission in the field of medical imaging.

[0049] The fixture of this invention is particularly suitable for polishing 10,000-pixel flexible image transmission fiber bundles in the fields of medical devices and imaging, especially for the surface treatment of high-resolution ultra-fine image transmission fiber bundles. It is applicable to scenarios requiring high-precision fiber imaging or high-quality fiber end-face polishing, such as medical endoscopic imaging systems, fiber optic communication data transmission modules, and industrial precision testing equipment—fields with extremely high requirements for the flatness and integrity of fiber bundle end faces. This invention is particularly suitable for diameters of 0.35-5 mm. A high-resolution imaging fiber bundle with a length of 30-200mm, consisting of 10,000 tightly arranged fiber filaments drawn twice, can achieve efficient and precise fixation during the fiber bundle polishing process, thereby reducing the fiber bundle edge breakage rate and improving polishing quality and efficiency.

[0050] The present invention will be further illustrated below through specific embodiments: Machining process of the fixture body: 1. Material preparation: 304 stainless steel is selected. The whole structure is cylindrical with a diameter of 104mm and a height of 30mm. The purity of the material is guaranteed to be ≥99%.

[0051] 2. Turning: Eight circular holes with an inner diameter of 11mm ± 0.01mm and a length of 30mm ± 0.02mm are uniformly machined on the end face of the stainless steel cylinder. In this embodiment, the circular holes are used to place the collection sleeve. Alternatively, the diameter of the circular holes can be machined to be the same as the diameter of the fiber bundle multifilament to be polished. Each circular hole is fixed with hot melt adhesive to one fiber bundle multifilament. If only one fiber bundle multifilament is placed, the subsequent paraffin encapsulation step is not involved. The circular holes are the first through holes. Then, a 5mm diameter through hole is machined at the center of the cylinder as a water inlet. The function of the through hole is to allow the cooling water flowing from the cooling water pipe set at a high position during the polishing process to flow into the bottom of the fixture body through the through hole, which plays a role in timely heat dissipation for the fixture body during the polishing process. Then, a 2.5mm ± 0.002mm diameter drainage hole is precision reamed on the sides of the eight circular holes using a reamer. The drainage hole is the second through hole. Each circular hole corresponds to three evenly arranged drainage holes, ensuring that the coaxiality between the channel axis of the drainage hole and the axis of the third through hole is ≤ 0.01mm.

[0052] After turning, the overall appearance is as follows: a 5mm through hole is opened in the middle of the end face of the stainless steel fixture cylinder. The through hole serves as a water inlet for cooling water, receiving cooling water flowing in from the top. Around the water inlet, there are 8 evenly arranged round holes, which are the first through holes. Each first through hole corresponds to a row of second through holes. The row of second through holes is set at a certain height. Each row of second through holes is connected to one of the corresponding 8 round holes and is also connected to the water inlet.

[0053] 3. Surface treatment: The outer surface of the fixture body is polished to a roughness Ra of 0.05. Then, the outer surface is anodized to improve its wear resistance and corrosion resistance. The outer surface refers to the top and bottom end faces of the cylinder and the cylinder's perimeter. Polishing the top and bottom end faces is to prevent the rough surface from scratching the polishing pad during the polishing process. Polishing the perimeter ensures that the fixture body rotates at a uniform speed along with the direction of rotation of the polishing machine's robotic arm during the polishing process, avoiding jamming caused by irregular shapes. Anodizing the outer surface of the fixture body is to prevent the polishing fluid from corroding and rusting, thus preventing contamination of the fiber optic bundle's end faces.

[0054] Methods for polishing fiber bundle multifilaments: Pretreatment of fiber bundle multifilaments: Fiber bundles with a length of 380mm and a diameter of 0.35-5mm are pre-treated. The 10,000-pixel fiber bundle is cut into two sections, and the ends are cut into flat ends to remove burrs and debris. The surface oil is cleaned with anhydrous ethanol and then dried for later use. In order to avoid introducing other impurities, the fiber bundle multifilament is pretreated before polishing. Precise layout: Select glass sleeves and fiber bundles of uniform specifications. The number of fiber bundles in each glass sleeve is controlled within the range of 500-600. The selected glass sleeves have a diameter of 10mm, a wall thickness of 2mm, and a length of 180mm. The diameter of each fiber bundle is 0.35-5mm. The fiber bundle consists of 600 fibers with a length of 30-200mm, and each fiber bundle has a diameter of 0.35mm. The fiber bundle is 190mm long to ensure that it completely fills the glass sleeve during the fiber bundle arrangement process. Following the principle of bottom to top and left to right, the 600 pre-processed fiber bundles are inserted into the glass sleeve from one end and out from the other end, ensuring that the length of each end extending out of the glass sleeve is greater than or equal to 5mm ± 1mm. They are inserted into the glass sleeve one by one, so that there is no overlap between adjacent fiber bundles and no large gaps visible to the naked eye, achieving a tight arrangement. This ensures that the fiber bundle arrangement density is uniform in the glass sleeve and that the overall structure is stable.

[0055] Heating paraffin: Select pathological grade paraffin with a melting point of 58-60℃ and a viscosity of 15-20 mPa・s at 60℃. Place it in a paraffin storage tank, put the paraffin storage tank on an induction cooker, and start the temperature control heating module of the induction cooker to heat the paraffin in the paraffin storage tank to 60℃ and maintain it for 30 minutes to melt the paraffin. Filling with paraffin wax: Place the glass sleeve containing the fiber bundle multifilaments into the molten paraffin wax storage tank, allowing the molten paraffin wax to fill the gaps between the fiber bundle multifilaments in the collecting sleeve. When the wax filling begins, air bubbles will emerge from the pores in the collecting sleeve. When no air bubbles emerge, let it stand for another 15 minutes. If no air bubbles emerge within the 15 minutes of standing, stop the wax filling. Then cool until the paraffin wax begins to solidify. Remove the collecting sleeve and let it cool naturally to room temperature. Cut the excess length of the fiber bundle multifilaments at both ends to achieve the required length of 180mm. Clamping and fixing: Place the paraffin-encapsulated fiber bundle and glass sleeve into the eight round holes of the fixture body, and press in the upper and lower pressure rings to fix the collection sleeve in the round holes. Each of the eight round holes is provided with a polytetrafluoroethylene buffer layer. Use 24 screws to pass through the drainage holes to fix the glass sleeve.

[0056] When not using a polytetrafluoroethylene buffer layer, use hot melt adhesive to fix the 8 collection sleeves into the 8 round holes respectively.

[0057] Polishing: The fixture body containing the fiber bundle multifilaments is placed in a polishing machine to polish the upper and lower end faces of the fiber bundle multifilaments. The polishing process includes: first, setting the polishing parameters: polishing machine speed: 120 r / min; selecting a polyurethane material with a hardness of Shore A 80 as the polishing pad; and setting the suspension flow rate to 20 d / min. Then, the fixture is placed on the polishing disc, and particles with a particle size of 150 are dripped into the polishing disc. Alternatively, a particle size of 80 can be selected. Or 200 The polishing slurry used is a 13% cerium oxide polishing slurry, or a 15% or 10% cerium oxide polishing slurry. Then, the polishing disc is rotated for rough polishing for 2-3 hours, preferably 2.5 hours, followed by polishing with a 0.25 grit particle size. 3 Or 5 Polish with cerium oxide polishing solution of concentration of 10%, 12% or 15% for 1-2 minutes; During the polishing process, the water inlet is connected to the cooling water pipe through the cooling water valve. When the polishing disc starts running, the cooling water valve is opened at the same time to inject cooling water into the fixture body through the water inlet. The inlet temperature of the cooling water is controlled at 20-30℃ and the flow rate is 0.3-0.5L / min. The cooling water is discharged from the 24 drain holes around the fixture body, so that the working temperature of the fixture body is controlled within the range of 25-30℃, and the polishing of one end face of the fiber bundle multifilament is completed. After polishing one end face of the fiber bundle multifilament according to the polishing process, when using hot melt adhesive for fixation, first heat the polishing disc to 80-90℃ to melt the hot melt adhesive, then remove the upper and lower pressure rings, take out the collection sleeve, clean the residual hot melt adhesive, flip the collection sleeve over, and then use hot melt adhesive and upper and lower pressure rings to fix it into the corresponding round hole again. Then, complete the polishing process of the other end face of the fiber bundle multifilament in the collection sleeve according to the polishing process. When using screws to fix the collecting sleeve, remove the screws, remove the upper and lower pressure rings, flip the collecting sleeve, fix the upper and lower pressure rings and screws again, and complete the polishing process of the other end face of the fiber bundle multifilament inside the collecting sleeve. Post-processing: After polishing both end faces, turn off the polishing machine and remove the upper and lower pressure rings; rinse with clean water to remove polishing fluid from the fixture surface, and blow away any remaining polishing fluid with compressed air; melt the paraffin wax with 80℃ hot water and remove the fiber bundle multifilament; soak the fiber bundle multifilament in a cleaning agent, and then use a 40W ultrasonic cleaner with a frequency of 50-100HZ for 30 minutes to remove residual paraffin wax from the end faces and surfaces of the fiber bundle multifilament. Cleaning agents can include alcohol-based cleaners such as ethanol or isopropanol, oil-based solvents such as kerosene, diesel, or turpentine, or strong detergents containing surfactants such as industrial detergents and degreasers.

[0058] Inspection of end-face quality: The roughness Ra of the end face of the fiber bundle multifilament is inspected to be 0.06. Flatness 0.3 .

[0059] Fiber bundle multifiber performance testing and verification: 1. Breakage rate test: 100 bundles of 10,000-pixel optical fibers were selected and polished using the fixture of this invention. The results showed that only 2 bundles had single filament breakage (the number of broken single filaments in each bundle was ≤3), with a breakage rate of 2%, which is much lower than the 15%-20% of the prior art.

[0060] 2. Thermal stability test: After 5 hours of continuous polishing, the surface temperature of the fixture was monitored by an infrared thermometer and remained stable at 25-30℃ with no significant temperature rise.

[0061] 3. Reusability test: After 10 cycles of clamping-polishing-disassembly of the same fixture, there was no obvious wear on any part, and the paraffin sealing effect did not decrease.

[0062] Through the above performance tests, the flexible fiber bundle polishing fixture provided by this invention effectively solves the damage problem in the polishing process of a 10,000-pixel flexible image transmission fiber bundle through innovative structural design and process parameter optimization, significantly improving polishing quality and efficiency, and has important practical value and promotion prospects.

[0063] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A flexible fiber optic bundle polishing fixture for medical imaging and data transmission, characterized by: The utility model provides a kind of optical fiber bundle fixing device, including clamp body, which is provided with multiple first through holes on the clamp body, and the first through hole penetrates the upper and lower end surfaces of the clamp body;Each first through hole is provided with a second through hole on one side, and the second through hole penetrates the inner wall of the first through hole and the outer wall of the clamp body.

2. The flexible fiber optic bundle polishing fixture for medical imaging and data transmission of claim 1, wherein, The inner wall of the first through hole is provided with a buffer layer, and the Shore hardness of the buffer layer is A50-60, and the friction coefficient is less than or equal to 0.

05.

3. The flexible fiber optic bundle polishing fixture for medical imaging and data transmission of claim 2, wherein, The buffer layer is a polytetrafluoroethylene buffer layer, and the thickness of the polytetrafluoroethylene buffer layer is 2.5-4 mm.

4. The flexible fiber optic bundle polishing fixture for medical imaging and data transmission of claim 3, wherein, The middle of the clamp body is provided with a water injection port, and the sidewall of the water injection port is provided with multiple third through holes, which penetrate the sidewall of the water injection port and the inner wall of the first through hole. Each first through hole is connected to the water injection port through at least one third through hole.

5. The flexible fiber optic bundle polishing fixture for medical imaging and data transmission of claim 4, wherein, The diameter of the second through hole is 2-5 mm, and the second through hole is provided with more than two second through holes at intervals along the height direction of the corresponding first through hole. The second through hole is provided with an internal thread for screwing, and the screw is used to fix the collection sleeve in the first through hole. The third through hole is provided with more than two third through holes at intervals along the height direction of the water injection port.

6. A flexible fiber optic bundle polishing fixture for medical imaging and data transmission according to any of claims 1-5, characterized in that, The material of the clamp body is 304 stainless steel, the clamp body is a cylinder, a cube, a hexagonal body or a triangular prism, the outer diameter of the cylinder is 80-120mm, the height is 10-40mm, the diameter of the first through hole is 8-15mm; the center of the first through hole is equal to the center of the clamp body; the outer surface of the clamp body is polished and anodized, the roughness Ra of the outer surface is 0.03-0.1 .

7. A method of polishing a flexible fiber optic bundle using the polishing jig for medical imaging and data transmission according to any one of claims 1 to 6, characterized in that: The utility model provides a kind of optical fiber bundle fixing device, and the method comprises the following steps: Paraffin wax packaging: select the optical fiber bundle with uniform specification and insert it into the collection sleeve, so that the optical fiber bundle is tightly arranged and completely fills the collection sleeve. Paraffin wax is used to uniformly fill the gap between the optical fiber bundles in the collection sleeve. The optical fiber bundle includes optical fiber bundle filaments and optical fiber bundle filaments. Inserting optical fiber bundle filaments: select a single optical fiber bundle with a diameter similar to that of the first through hole and insert it into the first through hole. Use hot melt adhesive to fix the optical fiber bundle to the first through hole, or insert the collection sleeve packaged with the optical fiber bundle into the first through hole. The collection sleeve is fixed to the first through hole by hot melt adhesive, and is pressed into the upper and lower pressing rings to fix the collection sleeve in the first through hole again. When the inner wall of the first through hole is provided with a buffer layer, the collection sleeve is fastened by the screws on the side. Polishing process: place the clamp body filled with the optical fiber bundle into the polishing machine to polish the upper and lower end surfaces of the optical fiber bundle. The polishing process includes: first, place the clamp on the polishing disc, drop polishing liquid into the polishing disc, then rotate the polishing disc for rough polishing, and then fine polishing. During the polishing process, the water injection port is connected to the cooling water pipe through the cooling water valve. When the polishing disc starts to run, the cooling water valve is opened at the same time. Cool water is injected into the clamp body through the water injection port, so that the working temperature of the clamp body is within the preset temperature range. After completing the polishing of one end surface of the optical fiber bundle filaments according to the polishing process, when using hot melt adhesive to fix, first heat the polishing disc to 80-90℃, so that the hot melt adhesive melts. Take out the single optical fiber bundle filament, turn it over and fix it to the first through hole by hot melt adhesive. Complete the polishing of the other end surface of the optical fiber bundle filaments according to the polishing process. Or after the hot melt adhesive melts, remove the upper and lower pressing rings, take out the collection tube, clean the residual hot melt adhesive, turn over the collection sleeve and re-fix it to the first through hole. Complete the polishing of the other end surface of the optical fiber bundle filaments in the collection sleeve according to the polishing process. When the collecting sleeve is fixed by screws, the screws are disassembled, the collecting sleeve is turned over, the screws are fixed again, and another end surface polishing process of the optical fiber bundle is completed according to the polishing process; After treatment: after polishing, the polisher is turned off, and the upper and lower pressing rings are removed; the fixture body surface polishing liquid is removed by using clean water to wash, and the remaining polishing liquid is blown away by using compressed air; the optical fiber bundle is taken out after the paraffin is melted; the paraffin remaining on the end surface of the optical fiber bundle is removed.

8. The method of claim 7, wherein: The paraffin packaging includes a paraffin storage process, a temperature control heating process and a wax filling process; The paraffin is stored in a paraffin storage tank, the paraffin is heated to 60-80 DEG C by using a temperature control heating module of an electric heating furnace constant temperature control, the paraffin is melted after being kept warm for a certain time, the collecting sleeve is put into the melted paraffin storage tank, the paraffin is filled into the gap between the optical fiber bundles in the collecting sleeve, the collecting sleeve is placed for 10-20 min, the small bubbles in the collecting sleeve are completely precipitated, then the paraffin is cooled to start initial solidification, the collecting sleeve is taken out, and the optical fiber bundle is naturally cooled to room temperature, the excess length of the optical fiber bundle is cut to reach the required size; The paraffin is pathological section paraffin with a melting point of 58-60 DEG C, and the paraffin viscosity is 15-20 mPa・s at 60 DEG C; The inlet temperature of the cooling water is 20-30 DEG C, the flow of the cooling water is 0.3-0.5 L / min, and the preset temperature range is 20-30 DEG C. In the aftertreatment, the paraffin is melted by using 80-100 DEG C hot water.

9. The method of claim 8, wherein: The parameter setting of the polishing treatment includes: the rotation speed of the polishing disc of the polishing machine is 100-140 r / min; the polishing pad in the polishing machine is polyurethane material with Shore A hardness of 80; the polishing liquid is cerium oxide suspension; the particle size of the coarse polishing is 80-200 , the mass percentage concentration of the cerium oxide suspension is 10-15%, and the suspension flow is 20 d / min; the polishing time of the coarse polishing is 120-180 minutes; the particle size of the fine polishing is 0.25-5 , the concentration of the cerium oxide suspension is 10-15%, and the suspension flow is 20 d / min; the polishing time of the fine polishing is 60-120 minutes.

10. The method of claim 9, wherein: The collecting sleeve is a glass sleeve, a stainless steel sleeve, a polyvinyl chloride plastic sleeve, an acrylic sleeve or a quartz sleeve; The optical fiber bundle is a 10,000 pixel flexible image transmission optical fiber bundle, which is used for data transmission in the medical imaging field.

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