CN119928259B - Tube melt-drawn coated optical fiber preparation device - Google Patents
Tube melt-drawn coated optical fiber preparation deviceInfo
- Publication number
- CN119928259B CN119928259B CN202510097470.2A CN202510097470A CN119928259B CN 119928259 B CN119928259 B CN 119928259B CN 202510097470 A CN202510097470 A CN 202510097470A CN 119928259 B CN119928259 B CN 119928259B
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- optical fiber
- pipe
- frame
- fusion
- speed reducing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
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- Surface Treatment Of Glass Fibres Or Filaments (AREA)
Abstract
本发明涉及光纤保护技术领域，公开了一种管材熔融拉伸包覆光纤制备装置，包括机架，机架顶部设有定位包覆管材的夹持装置，机架的底部设有收卷装置，收卷装置位于夹持装置的正下方，套有包覆管材的光纤从夹持装置下方伸出穿过加热装置卷绕在收卷装置内，加热装置可上下移动。本发明管材熔融拉伸包覆光纤制备装置，可以灵活地控制包覆层的厚度和长度，适用于多种包覆材料的加工，制备成本低。
The present invention relates to the field of optical fiber protection technology and discloses a device for preparing optical fiber by melt-drawing and coating a tubular material. The device comprises a frame, a clamping device disposed at the top of the frame for positioning the coated tubular material, and a winding device disposed at the bottom of the frame. The winding device is located directly below the clamping device. The optical fiber coated with the coated tubular material extends from below the clamping device, passes through a heating device, and is wound within the winding device. The heating device is movable up and down. The device for preparing optical fiber by melt-drawing and coating a tubular material can flexibly control the thickness and length of the coating layer, is applicable to the processing of a variety of coating materials, and has a low production cost.
Description
Technical Field
The invention relates to the technical field of optical fiber protection, in particular to a pipe fusion stretching cladding optical fiber preparation device.
Background
With the rapid development of communication technology and sensing technology, optical fibers have been widely used in the fields of communication networks, sensors, and the like due to their characteristics of high transmission rate, low loss, and electromagnetic interference resistance. Under certain special circumstances, such as high pressure, electromagnetic interference and extreme temperature conditions, the optical fiber needs to be encased in a tubing with protective function to ensure its normal use under severe conditions.
In the prior art, the coating method of the optical fiber generally adopts coating type coating and melt extrusion type coating, but the preparation method usually needs to use a special mold, has complex device and low flexibility, can only prepare the optical fiber coating with single thickness in each preparation process, has long preparation length, causes the phenomenon that the optical fiber is wasted in the coating process, and has higher cost.
Disclosure of Invention
The invention aims at overcoming the defects of the technology, and provides a pipe fusion stretching cladding optical fiber preparation device which can flexibly control the thickness and the length of a cladding layer, is suitable for processing various cladding materials and has low preparation cost.
In order to achieve the above purpose, the pipe fusion stretching coated optical fiber preparation device comprises a rack, wherein the top of the rack is provided with a clamping device for positioning coated pipes, the bottom of the rack is provided with a winding device, the winding device is positioned under the clamping device, the whole device is vertically arranged, longitudinal fusion stretching is avoided, the influence of gravity on the stretching effect is avoided, optical fibers sleeved with the coated pipes extend out of the lower part of the clamping device and pass through a heating device to be wound in the winding device, the heating device can move up and down, the winding device fixes the coated pipes, the coated pipes and the optical fibers can be kept in a vertical state all the time in the preparation process, the coated pipes are prevented from being adhered to the inside of the heating device, and meanwhile, the coating is more uniform.
Preferably, the movement speed of the optical fiber is related to the size of the coating prepared by: Wherein R 0 is the outer diameter radius of the initial cladding pipe, R 0 is the inner diameter radius of the initial cladding pipe, R 1 is the outer diameter radius of the cladding pipe after melt molding, R 1 is the inner diameter radius of the cladding pipe after melt molding, v 0 is the moving speed of the heating device, v 1 is the moving speed of the optical fiber, the initial end of the cladding pipe is taken to melt in a time t under the state of stable melt stretching in the cladding pipe, the melting length is L 0, and the stretch molding length is L 1, namely The speed of the heating device and the winding speed of the winding device can be calculated in advance before preparation, so that the coating layer meeting the processing requirements can be prepared.
Preferably, the winding device is connected with a first servo motor for driving the winding device to rotate, and a speed reducing device is arranged between the first servo motor and the winding device.
Preferably, the speed reducer comprises a first speed reducing gear set arranged on the first servo motor and a second speed reducing gear set arranged on the winding device, the speed reducing ratio is 10-100, the first speed reducing gear set and the second speed reducing gear set are connected through a transmission rod arranged on a bearing, the phenomenon that the rotation speed of the first servo motor is too low and is uneven is avoided, the winding device can stably wind optical fibers, and the stability of a system is improved.
Preferably, a ceramic heating pipe is arranged in the heating device, the heating range is room temperature-400 ℃, a heat conducting pipe is sleeved in the ceramic heating pipe, the length of the heat conducting pipe is 80-100 mm, and a heat insulation felt is wrapped outside the heat conducting pipe, so that heat loss is reduced.
Preferably, the glass tube is arranged at both ends of the heat conducting tube in an extending mode, the glass tube can slow down thermal shock, so that the rate of finished products of optical fiber cladding is improved, one end of the glass tube is fixedly bonded with the heat conducting tube through graphite glue, a shrinkage nozzle is arranged at the other end of the glass tube, the optical fiber and cladding materials can be placed at the central position of the heating device, centering is achieved, and the situation that the optical fiber is too close to the inner wall of the heating device is prevented.
Preferably, a sliding table frame is arranged on the side face of the frame, the heating device is installed on the sliding table through a support, the sliding table is installed on a vertical screw rod, the screw rod is installed on the sliding table frame, and a second servo motor for driving the screw rod to rotate is arranged on the sliding table frame.
Preferably, a diameter detection device for detecting the rear diameter of the optical fiber coated pipe is arranged below the heating device, the thickness of the coating layer can be detected in real time and fed back to the controller, so that the thickness of the coating layer is controlled by adjusting the speed of the motor, and further, the finished product better meets the processing requirement.
Preferably, a tension detection device for measuring the tension of the optical fiber coated with the pipe on the winding device is arranged on the rack, the tension of the optical fiber is measured in real time, so that the tension of the optical fiber is in a constant state, when the optical fiber coating layer is defective, the tension can change, and the equipment can timely send out an alarm notice, so that an operator can conveniently process the tension in time.
Preferably, the stand is provided with a power supply and a control device for driving and adjusting all the equipment, and the control device comprises a driver, a controller and an encoder for driving and adjusting the servo motor.
Compared with the prior art, the invention has the following advantages:
1. The optical fiber is directly coated in the pipe in a molten state by a fusion stretching technology, so that the method is applicable to processing of various coating materials and has low preparation cost;
2. The thickness and the length of the coating layer can be flexibly controlled, the material is easy to obtain, and the preparation cost of the optical fiber coating is effectively reduced.
Drawings
FIG. 1 is a schematic structural view of a tube fusion-drawn clad optical fiber manufacturing apparatus according to the present invention;
FIG. 2 is a schematic diagram of the speed reducer of FIG. 1;
fig. 3 is a schematic view of the melt-stretch coating of a coated pipe.
The reference numerals of the components in the drawings are as follows:
The device comprises a frame 1, a coated pipe 2, a clamping device 3, a winding device 4, an optical fiber 5, a heating device 6, a first servo motor 7, a speed reduction device 8, a first speed reduction gear set 9, a second speed reduction gear set 10, a bearing 11, a transmission rod 12, a sliding table frame 13, a bracket 14, a sliding table 15, a screw rod 16, a second servo motor 17, a diameter detection device 18, a tension detection device 19, a driver 20, a controller 21, an encoder 22 and a power supply 23.
Detailed Description
The invention will be further described in detail with reference to the accompanying drawings and specific examples in order to make the objects, technical solutions and advantages of the invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not interfere with each other.
Example 1
As shown in FIG. 1, a pipe fusion stretching coated optical fiber preparation device comprises a frame 1, wherein a clamping device 3 for positioning a coated pipe 2 is arranged at the top of the frame 1, a winding device 4 is arranged at the bottom of the frame 1, the winding device 4 is positioned right below the clamping device 3, an optical fiber 5 sleeved with the coated pipe 2 extends out from the lower part of the clamping device 3, passes through a heating device 6 and is wound in the winding device 4, and the heating device 6 can move up and down.
When used in conjunction with FIG. 3, the relationship between the movement speed of the optical fiber 5 and the size of the coating prepared satisfies the following conditions: Wherein R 0 is the outer diameter radius of the initial cladding pipe 2, R 0 is the inner diameter radius of the initial cladding pipe 2, R 1 is the outer diameter radius of the cladding pipe 2 after melt molding, R 1 is the inner diameter radius of the cladding pipe 2 after melt molding, v 0 is the moving speed of the heating device 6, v 1 is the moving speed of the optical fiber 5, the initial end of the cladding pipe 2 is taken to melt in a time t under the state of stable melt stretching, the melting length is L 0, and the stretch molding length is L 1, namely The speed of the heating device 6 and the winding speed of the winding device 4 can be calculated in advance before the preparation so as to prepare the coating layer meeting the processing requirements.
Example 2
As shown in FIG. 1, a pipe fusion stretching coated optical fiber preparation device comprises a frame 1, wherein a clamping device 3 for positioning a coated pipe 2 is arranged at the top of the frame 1, a winding device 4 is arranged at the bottom of the frame 1, the winding device 4 is positioned right below the clamping device 3, an optical fiber 5 sleeved with the coated pipe 2 extends out from the lower part of the clamping device 3, passes through a heating device 6 and is wound in the winding device 4, and the heating device 6 can move up and down.
When used in conjunction with FIG. 3, the relationship between the movement speed of the optical fiber 5 and the size of the coating prepared satisfies the following conditions: Wherein R 0 is the outer diameter radius of the initial cladding pipe 2, R 0 is the inner diameter radius of the initial cladding pipe 2, R 1 is the outer diameter radius of the cladding pipe 2 after melt molding, R 1 is the inner diameter radius of the cladding pipe 2 after melt molding, v 0 is the moving speed of the heating device 6, v 1 is the moving speed of the optical fiber 5, the initial end of the cladding pipe 2 is taken to melt in a time t under the state of stable melt stretching, the melting length is L 0, and the stretch molding length is L 1, namely The speed of the heating device 6 and the winding speed of the winding device 4 can be calculated in advance before the preparation so as to prepare the coating layer meeting the processing requirements.
As shown in fig. 2, in this embodiment, the winding device 4 is connected with a first servo motor 7 for driving the winding device to rotate, a speed reducing device 8 is arranged between the first servo motor 7 and the winding device 4, the speed reducing device 8 comprises a first speed reducing gear set 9 installed on the first servo motor 7 and a second speed reducing gear set 10 installed on the winding device 4, the speed reducing ratio is 10-100, and the first speed reducing gear set 9 and the second speed reducing gear set 10 are connected through a transmission rod 12 arranged on a bearing 11.
Example 3
As shown in FIG. 1, a pipe fusion stretching coated optical fiber preparation device comprises a frame 1, wherein a clamping device 3 for positioning a coated pipe 2 is arranged at the top of the frame 1, a winding device 4 is arranged at the bottom of the frame 1, the winding device 4 is positioned right below the clamping device 3, an optical fiber 5 sleeved with the coated pipe 2 extends out from the lower part of the clamping device 3, passes through a heating device 6 and is wound in the winding device 4, and the heating device 6 can move up and down.
When used in conjunction with FIG. 3, the relationship between the movement speed of the optical fiber 5 and the size of the coating prepared satisfies the following conditions: Wherein R 0 is the outer diameter radius of the initial cladding pipe 2, R 0 is the inner diameter radius of the initial cladding pipe 2, R 1 is the outer diameter radius of the cladding pipe 2 after melt molding, R 1 is the inner diameter radius of the cladding pipe 2 after melt molding, v 0 is the moving speed of the heating device 6, v 1 is the moving speed of the optical fiber 5, the initial end of the cladding pipe 2 is taken to melt in a time t under the state of stable melt stretching, the melting length is L 0, and the stretch molding length is L 1, namely The speed of the heating device 6 and the winding speed of the winding device 4 can be calculated in advance before the preparation so as to prepare the coating layer meeting the processing requirements.
As shown in fig. 2, in this embodiment, the winding device 4 is connected with a first servo motor 7 for driving the winding device to rotate, a speed reducing device 8 is arranged between the first servo motor 7 and the winding device 4, the speed reducing device 8 comprises a first speed reducing gear set 9 installed on the first servo motor 7 and a second speed reducing gear set 10 installed on the winding device 4, the speed reducing ratio is 10-100, and the first speed reducing gear set 9 and the second speed reducing gear set 10 are connected through a transmission rod 12 arranged on a bearing 11.
In the embodiment, a ceramic heating pipe is arranged inside the heating device 6, the heating range is room temperature-400 ℃, a heat conducting pipe is sleeved in the ceramic heating pipe, the length of the heat conducting pipe is 80-100 mm, a heat insulating felt is wrapped outside the heat conducting pipe, glass pipes are arranged at two ends of the heat conducting pipe in an extending mode, one ends of the glass pipes are fixedly bonded with the heat conducting pipe through graphite glue, and a shrinkage nozzle is arranged at the other ends of the glass pipes.
Example 4
As shown in FIG. 1, a pipe fusion stretching coated optical fiber preparation device comprises a frame 1, wherein a clamping device 3 for positioning a coated pipe 2 is arranged at the top of the frame 1, a winding device 4 is arranged at the bottom of the frame 1, the winding device 4 is positioned right below the clamping device 3, an optical fiber 5 sleeved with the coated pipe 2 extends out from the lower part of the clamping device 3, passes through a heating device 6 and is wound in the winding device 4, and the heating device 6 can move up and down.
When used in conjunction with FIG. 3, the relationship between the movement speed of the optical fiber 5 and the size of the coating prepared satisfies the following conditions: Wherein R 0 is the outer diameter radius of the initial cladding pipe 2, R 0 is the inner diameter radius of the initial cladding pipe 2, R 1 is the outer diameter radius of the cladding pipe 2 after melt molding, R 1 is the inner diameter radius of the cladding pipe 2 after melt molding, v 0 is the moving speed of the heating device 6, v 1 is the moving speed of the optical fiber 5, the initial end of the cladding pipe 2 is taken to melt in a time t under the state of stable melt stretching, the melting length is L 0, and the stretch molding length is L 1, namely The speed of the heating device 6 and the winding speed of the winding device 4 can be calculated in advance before the preparation so as to prepare the coating layer meeting the processing requirements.
As shown in fig. 2, in this embodiment, the winding device 4 is connected with a first servo motor 7 for driving the winding device to rotate, a speed reducing device 8 is arranged between the first servo motor 7 and the winding device 4, the speed reducing device 8 comprises a first speed reducing gear set 9 installed on the first servo motor 7 and a second speed reducing gear set 10 installed on the winding device 4, the speed reducing ratio is 10-100, and the first speed reducing gear set 9 and the second speed reducing gear set 10 are connected through a transmission rod 12 arranged on a bearing 11.
In the embodiment, a ceramic heating pipe is arranged inside the heating device 6, the heating range is room temperature-400 ℃, a heat conducting pipe is sleeved in the ceramic heating pipe, the length of the heat conducting pipe is 80-100 mm, a heat insulating felt is wrapped outside the heat conducting pipe, glass pipes are arranged at two ends of the heat conducting pipe in an extending mode, one ends of the glass pipes are fixedly bonded with the heat conducting pipe through graphite glue, and a shrinkage nozzle is arranged at the other ends of the glass pipes.
In addition, the heating pipe is provided with a platinum resistor, so that temperature information can be transmitted back to the temperature controller, and temperature monitoring and control can be conveniently performed.
In this embodiment, a sliding table frame 13 is arranged on the side surface of the frame 1, the heating device 6 is installed on a sliding table 15 through a bracket 14, the sliding table 15 is installed on a vertical screw rod 16, the screw rod 16 is installed on the sliding table frame 13, and a second servo motor 17 for driving the screw rod 16 to rotate is arranged on the sliding table frame 13.
In the above embodiment, a diameter detecting device 18 for detecting the diameter of the optical fiber coated pipe may be disposed below the heating device 6, and a tension detecting device 19 for measuring the tension of the optical fiber 5 coated with the pipe on the winding device 4 may be disposed on the frame 1.
Finally, the frame 1 is provided with a control device for driving and adjusting the equipment by a power supply 23, and the control device comprises a driver 20, a controller 21 and an encoder 22 for controlling the operation of the equipment.
The tube fusion-stretching coated optical fiber preparation device is used for coating the optical fiber 5, wherein the coated tube 2 comprises but is not limited to an elongated tube composed of polyether ether ketone, polytetrafluoroethylene, polyaryletherketone and other materials with the outer diameter within 2mm, and can be used for coating optical fibers including but not limited to quartz optical fibers, composite optical fibers, plastic optical fibers and the like.
The pipe fusion stretching coated optical fiber preparation device directly coats the optical fiber 5 in the pipe in a fusion state by using a fusion stretching technology, can be suitable for processing various coating materials, has low preparation cost, can flexibly control the thickness and the length of a coating layer, is easy to obtain the material, and effectively reduces the preparation cost of optical fiber coating.
Here, it should be noted that the description of the above technical solution is exemplary, and the present specification may be embodied in different forms and should not be construed as being limited to the technical solution set forth herein. Rather, these descriptions will be provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. Furthermore, the technical solution of the invention is limited only by the scope of the claims.
It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the invention, and the above-described structure should be considered to be within the scope of the invention.
Claims (9)
1. The utility model provides a tubular product melting stretch cladding optic fibre preparation facilities, includes frame (1), its characterized in that frame (1) top is equipped with clamping device (3) of location cladding tubular product (2), the bottom of frame (1) is equipped with coiling mechanism (4), coiling mechanism (4) are located under clamping device (3), optical fiber (5) that the cover has cladding tubular product (2) stretch out from clamping device (3) below and pass heating device (6) and wind in coiling mechanism (4), heating device (6) can reciprocate, the relation of the velocity of movement of optical fiber (5) and the cladding size of preparing satisfies: Wherein In order to initially coat the outer diameter radius of the pipe (2),For initially coating the inner diameter radius of the pipe (2),In order to coat the outer diameter radius of the pipe (2) after fusion molding,In order to coat the inner diameter radius of the pipe (2) after fusion molding,For the speed of movement of the heating device (6),Taking the initial end of the cladding pipe (2) in time under the state of stable melting and stretching for the moving speed of the optical fiber (5)Internal melting length ofStretch-formed length ofI.e. 。
2. The device for preparing the tube melt-drawn clad optical fiber according to claim 1, wherein the winding device (4) is connected with a first servo motor (7) for driving the winding device to rotate, and a speed reducing device (8) is arranged between the first servo motor (7) and the winding device (4).
3. The pipe fusion-drawn coated optical fiber preparation device according to claim 2, wherein the speed reducing device (8) comprises a first speed reducing gear set (9) arranged on the first servo motor (7) and a second speed reducing gear set (10) arranged on the winding device (4), the speed reducing ratio is 10-100, and the first speed reducing gear set (9) and the second speed reducing gear set (10) are connected through a transmission rod (12) arranged on a bearing (11).
4. The device for preparing the tube fusion-drawn clad optical fiber according to claim 1, wherein a ceramic heating tube is arranged in the heating device (6), the heating range is room temperature-400 ℃, a heat conducting tube is sleeved in the ceramic heating tube, the length of the heat conducting tube is 80-100 mm, and a heat insulation felt is wrapped outside the heat conducting tube.
5. The apparatus for preparing a fusion-drawn coated optical fiber of pipe material as recited in claim 4, wherein glass tubes are extended from both ends of the heat-conducting tube, one ends of the glass tubes are fixedly bonded with the heat-conducting tube through graphite glue, and a shrinking nozzle is arranged at the other ends of the glass tubes.
6. The pipe fusion-drawing coated optical fiber preparation device according to claim 1, wherein a sliding table frame (13) is arranged on the side face of the rack (1), the heating device (6) is installed on a sliding table (15) through a support (14), the sliding table (15) is installed on a vertical screw rod (16), the screw rod (16) is installed on the sliding table frame (13), and a second servo motor (17) for driving the screw rod (16) to rotate is arranged on the sliding table frame (13).
7. The apparatus for producing a fusion-drawn coated optical fiber of a tube according to claim 1, wherein a diameter detecting device (18) for detecting the rear diameter of the optical fiber coated tube is provided below the heating device (6).
8. The apparatus for preparing a fusion-drawn coated optical fiber of a pipe according to claim 1, wherein the frame (1) is provided with a tension detecting device (19) for measuring the tension of the optical fiber (5) coated with the pipe on the winding device (4).
9. The apparatus for preparing the fusion-drawn coated optical fiber of pipe material according to claim 1, wherein the frame (1) is provided with a power supply (23) and a control device for driving and adjusting each device, and the apparatus comprises a driver (20), a controller (21) and an encoder (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202510097470.2A CN119928259B (en) | 2025-01-22 | 2025-01-22 | Tube melt-drawn coated optical fiber preparation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202510097470.2A CN119928259B (en) | 2025-01-22 | 2025-01-22 | Tube melt-drawn coated optical fiber preparation device |
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| Publication Number | Publication Date |
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| CN119928259A CN119928259A (en) | 2025-05-06 |
| CN119928259B true CN119928259B (en) | 2025-10-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202510097470.2A Active CN119928259B (en) | 2025-01-22 | 2025-01-22 | Tube melt-drawn coated optical fiber preparation device |
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| US4351657A (en) * | 1980-02-21 | 1982-09-28 | Nippon Telegraph & Telephone Public Corporation | Method for coating optical fibers with thermoplastic resin |
| CN102590945A (en) * | 2011-01-05 | 2012-07-18 | 日立电线株式会社 | Optical fiber end processing method and optical fiber end processing apparatus and optical fiber end |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60215555A (en) * | 1984-04-09 | 1985-10-28 | Kobe Steel Ltd | Method for coating optical fiber and coating apparatus |
| JPH10287442A (en) * | 1997-04-15 | 1998-10-27 | Yazaki Corp | Fiber drawing machine |
| JP2006124191A (en) * | 2004-10-26 | 2006-05-18 | Fujikura Ltd | Optical fiber strand manufacturing method and optical fiber strand manufacturing apparatus |
| CN110746110A (en) * | 2019-12-10 | 2020-02-04 | 普天线缆集团有限公司 | Improved 1550 low loss optical fiber manufacturing apparatus and method of operation |
| CN112028470A (en) * | 2020-09-18 | 2020-12-04 | 程笔云 | Quantum secret communication transmission optical fiber production and processing technology |
| CN115793168A (en) * | 2023-02-07 | 2023-03-14 | 安徽雷彻科技有限公司 | Method for manufacturing optical fiber conduit containing cladding optical fiber |
| CN116589179B (en) * | 2023-06-09 | 2025-09-26 | 成都中住光纤有限公司 | A drawing preparation system for thin-diameter bend-resistant optical fiber |
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2025
- 2025-01-22 CN CN202510097470.2A patent/CN119928259B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4351657A (en) * | 1980-02-21 | 1982-09-28 | Nippon Telegraph & Telephone Public Corporation | Method for coating optical fibers with thermoplastic resin |
| CN102590945A (en) * | 2011-01-05 | 2012-07-18 | 日立电线株式会社 | Optical fiber end processing method and optical fiber end processing apparatus and optical fiber end |
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| CN119928259A (en) | 2025-05-06 |
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