KR101323761B1 - Scratch-treating method of optical fibers and scratch-treating apparatus of optical fibers - Google Patents

Abstract

PURPOSE: A scratch processing method of an optical fiber yarn and a device thereof are provided to obtain side light emission effects. CONSTITUTION: A scratch processing device (100) of an optical fiber yarn comprises a supply device (1), a plurality of ring guides (12, 14, 16, 20), a nozzle (18), and a guide bar (22). The supply device successively supplies the optical fiber yarn including a cladding layer and a core layer wrapped by the cladding layer. The plurality of the ring guides the supplied optical fiber yarn to a process direction. The nozzle supports the optical fiber yarn in order to stably provide a tensile force to the optical fiber yarn passing through one or more ring guides. A guide bar provides a friction force to the optical fiber yarn and removes abrasion on a cladding layer to install a sand paper forming an exposure window exposing the core layer of the optical fiber yarn to the surface of the optical fiber yarn.

Description

Scratch-treating method of optical fibers and scratch-treating apparatus of optical fibers

The present invention relates to a scratch processing method and a scratch processing apparatus of an optical fiber yarn. More specifically, the present invention relates to a scratch processing method having excellent tensile strength retention characteristics after a scratch treatment, and a scratch processing apparatus of an optical fiber yarn used therein.

The optical fiber is composed of a central core layer and a cladding layer surrounding the core layer. The core layer is usually made of quartz or transparent organic polymer material, and the cladding layer is made of fluorine-based polymer. The refractive index of the core layer is greater than the refractive index of the cladding layer and the light transmitted through the core layer is totally reflected at the interface between the core layer and the cladding layer so that it can be conducted to a long distance through the core layer while minimizing optical loss.

Optical fibers have traditionally been mainly used in the fields of communication, image transmission, and detectors. In recent years, the use of a light emitting phenomenon emitted by irradiating a light source such as an LED to the optical fiber as a decorative effect has been actively developed. Specific examples of the use of such light emission using an optical fiber as a decorative effect include indoor and outdoor decorative materials, curtain clothing and other textiles. Clothing and other textiles made using optical fibers are useful for rescue, military or leisure activities.

This decorative effect uses the phenomenon that the light emitted from the light source is conducted through the optical fiber and then visually sensed in the form of light emission at the cutting surface of the optical fiber. However, when only the light emission phenomenon at the end of the optical fiber is used, such as in communication, image transmission, and detector, the light emitting area is too small to obtain a sufficient decorative effect. Therefore, light emitting applications using optical fibers should rely on side light emission obtained by removing at least part of cladding on the side of the optical fiber rather than the ends of the optical fiber.

Therefore, a uniform light emitting effect can be obtained only when the exposure window exposing the core layer finely is formed over the whole side surface of the optical fiber. To this end, conventionally, a sand blasting process of spraying coarse particles, such as sand, at high pressure on the side of an optical fiber or a chemical etching process using a chemical that can remove cladding was performed. However, the conventional optical fiber processor manufactured as described above suffers damage even to the core layer, so that the tensile strength is so low that the threading phenomenon occurs frequently during subsequent processing and the durability of the final product has been pointed out. In addition, the latter chemical etching process not only takes a long time to process, but also generates a toxic substance and costs a chemical treatment.

Accordingly, an object of the present invention is to provide a scratch processing method of an optical fiber having a low productivity and minimizing tensile strength by substantially removing only a clad layer of an optical fiber.

It is another object of the present invention to provide a scratch processing apparatus of an optical fiber which is substantially superior in productivity by minimizing the reduction in tensile strength by substantially removing only the clad layer of the optical fiber.

One aspect of the present invention to achieve the above object of the present invention,

Continuously supplying an optical fiber yarn comprising a core layer and a cladding layer surrounding the core layer;

Pass through a plurality of ring guides for guiding the advancing direction of the supplied optical fiber yarns, nozzles for supporting the optical fiber yarns to stably provide tension to the optical fiber yarns, guide bars provided with sand paper, and guide bars provided with sand paper. It receives the optical fiber yarn and distributes it evenly from side to side and feeds it to the winding device to continuously pass the winding traverse assisting the winding and apply frictional force to the optical fiber yarn using the sand paper to remove the cladding layer of the optical fiber yarn. Thereby forming an exposed window exposing a core layer of the optical fiber yarn on a surface of the optical fiber yarn; And

It provides a scratch processing method of the optical fiber yarn comprising the step of winding the optical fiber yarn having the exposure window.

In one embodiment of the present invention, the removal amount of the cladding layer of the optical fiber yarn by adjusting at least one factor selected from the supply speed of the optical fiber yarn, the angle of incidence of the optical fiber yarn entering the nozzle and the speed of the winding traverse. Can be adjusted.

In one embodiment of the present invention, the incidence angle of the optical fiber yarn entering the nozzle is defined as an angle formed by the optical fiber yarn with the horizontal plane of the nozzle inlet side, it is preferred that the angle is 10 ° to 40 °.

In one embodiment of the present invention, when the total diameter of the optical fiber yarn is 250 to 500㎛ and the cladding layer thickness of the optical fiber yarn is 10 to 50㎛, the supply speed of the optical fiber yarn is 5 to 40 m / min, The winding traverse speed is preferably 5 to 30 dsm (distober per minutes).

In one embodiment of the invention, the number of the sand paper is preferably # 80 to # 400.

In one embodiment of the present invention, the core layer is made of quartz or polymethyl methacrylate and the cladding layer is a scratch processing method of optical fiber yarns, characterized in that made of a fluorine-based polymer resin.

Another aspect of the present invention to achieve the above object of the present invention,

A supply device for continuously supplying optical fiber yarns;

A plurality of ring guides for guiding a traveling direction of the supplied optical fiber yarn;

A nozzle for supporting the optical fiber yarn so that tension is stably applied to the optical fiber yarn that has passed through at least one of the plurality of ring guides;

A guide bar provided with sand paper for forming an exposed window exposing the core layer of the optical fiber yarn by applying friction to the optical fiber yarn passing through the nozzle to remove the cladding layer of the optical fiber yarn;

A winding traverse that receives the optical fiber yarn that has passed through the guide bar on which the sand paper is installed, and evenly distributes the optical fiber yarn from side to side to supply the winding device; And

It provides a scratch processing apparatus of an optical fiber yarn including a winding device for winding the optical fiber yarn passed through the winding traverse.

Using the scratch processing method and apparatus of the optical fiber yarn according to the present invention can obtain the following effects:

Since the exposure window exposing the core layer finely over the whole side of the optical fiber yarn can be formed uniformly, a uniform side light emitting effect can be obtained.

Since only the cladding layer of the optical fiber yarn can be removed and the wear removal of the core layer can be minimized, the tensile strength of the scratched optical fiber yarn can be preserved to almost 100%. Therefore, the trimming phenomenon during post-processing, such as the subsequent weaving process using it, does not occur well and does not substantially reduce the durability of the final product.

In addition, the processing time is shortened as compared with the conventional sand blasting and chemical etching treatment, and toxic substances are not generated, which is advantageous for continuous mass production.

1 is a schematic view showing a schematic configuration of a scratch processing apparatus and a processing method of an optical fiber yarn according to an embodiment of the present invention.
Figure 2 is a photograph showing the main part of the scratch processing apparatus of the optical fiber yarn according to an embodiment of the present invention.
Figure 3 is a change in the luminance at the end of the optical fiber yarn after the scratch processing for the change in the winding traverse speed in the range of a specific yarn feed speed (speed of yarn) in the scratch processing of the optical fiber yarn of 250㎛ diameter according to one embodiment of the present invention A graph representing.
Figure 4 shows the change in the luminance at the end of the optical fiber yarn after the scratch processing for the change of the winding speed (spin speed) in the range of the specific winding traverse speed in the scratch processing of the optical fiber yarn of 250㎛ diameter according to one embodiment of the present invention It is a graph.
Fig. 5 is a photograph showing the end light emission of an unprocessed 250 탆 optical fiber yarn.
6 is a photograph showing the side light emission of the optical fiber yarn with a diameter of 250㎛ scratched in accordance with an embodiment of the present invention.
FIG. 7 is a scanning transfer microscope photograph with a 40x magnification showing the side appearance of an untreated 250 µm optical fiber yarn. FIG.
8 is a scanning magnification micrograph at a magnification of 40 times showing the lateral appearance of an optical fiber yarn with a diameter of 250 μm scratched in accordance with an embodiment of the present invention.
9 is a change in the luminance at the end of the optical fiber yarn after the scratch processing for the change of the winding traverse speed in the range of a specific yarn feed speed (firing speed) in the scratch processing of 500㎛ diameter optical fiber yarn according to another embodiment of the present invention A graph representing.
FIG. 10 shows the change in luminance at the ends of optical fiber yarns after scratching against changes in winding speed (spinning speed) in a range of specific winding traverse speeds in the scratch processing of 500 m diameter optical fiber yarns according to another embodiment of the present invention. It is a graph.
FIG. 11 is a scanning magnification micrograph at a magnification of 40 times showing the side appearance of an untreated fiber 500 m in diameter.
FIG. 12 is a scanning magnification micrograph at a magnification of 40 times showing the lateral appearance of a 500 μm diameter optical fiber yarn scratched in accordance with another embodiment of the present invention. FIG.

Hereinafter, a scratch processing method and a processing apparatus of an optical fiber yarn according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic view showing a schematic configuration of a scratch processing apparatus 100 and a processing method of an optical fiber yarn according to an embodiment of the present invention, Figure 2 is a scratch processing apparatus 100 of an optical fiber yarn according to an embodiment of the present invention Photo shows the main part of the.

Referring to Figure 1, the scratch processing method of the optical fiber yarn of the present invention comprises the steps of continuously supplying an optical fiber yarn 1 including a core layer and a cladding layer surrounding the optical fiber yarn supply device 10;

A plurality of ring guides (12, 14, 16, 20) for guiding the advancing direction of the supplied optical fiber yarn (1), and a nozzle for supporting the optical fiber yarn (1) so that tension is stably applied to the optical fiber yarn (1) 18), a winding traverse that assists winding by receiving the optical fiber yarn 1 passing through the guide bar 22 provided with sand paper and the guide bar 22 provided with sand paper and evenly dividing it to the winding device. The core layer of the optical fiber yarn 1 is applied to the surface of the optical fiber yarn 1 by applying friction force to the optical fiber yarn 1 using sand paper while continuously passing the 24 and abrasion removing the cladding layer of the optical fiber yarn 1. Forming an exposure window for exposing the light; And

Winding the optical fiber yarn 1 having an exposure window.

The scratch processing method of the optical fiber yarn of the present invention described above may be implemented by the scratch processing apparatus 100 of the optical fiber yarn 1 including the following components:

A supply device 10 for continuously supplying an optical fiber yarn 1 comprising a core layer and a cladding layer surrounding the core layer;

A plurality of ring guides 12, 14, 16, and 20 for guiding the traveling direction of the optical fiber yarn 1 to be supplied;

A nozzle 18 supporting the optical fiber yarn 1 so that tension is stably applied to the optical fiber yarn 1 that has passed through at least one of the plurality of ring guides 12, 14, 16, 20;

By applying friction to the optical fiber yarn 1 passing through the nozzle 18, the cladding layer of the optical fiber yarn 1 is removed to expose the core window of the optical fiber yarn 1 on the surface of the optical fiber yarn 1. A guide bar 22 having sand paper formed thereon;

A winding traverse 24 that receives the optical fiber yarn 1 that has passed through the guide bar 22 provided with sand paper, and evenly distributes the same to the winding device 26 to feed the winding device 26; And

The winding device 26 which winds up the optical fiber yarn 1 which passed the winding traverse 24.

Referring to FIG. 2, an optical fiber yarn 1 having a cladding layer removed from a guide bar 22 provided with sand paper and a main part of a scratch processing apparatus of an optical fiber yarn according to an embodiment of the present invention illustrated in FIG. With the help of (24), the situation of being wound up by the winding-up device 26 can be understood well.

Hereinafter will be described in more detail with respect to the scratch processing method and processing apparatus 100 of the optical fiber yarn according to a preferred embodiment of the present invention.

First, the optical fiber yarn 1 including the core layer and the cladding layer surrounding it is continuously supplied from the optical fiber yarn supply device 10.

The optical fiber yarn supply device 10 is generally yarn krill. In the optical fiber yarn 1, the core layer is a transparent layer made of quartz or polymethyl methacrylate (PMMA). The cladding layer is a layer surrounding the core layer and is made of a fluorine-based polymer resin such as polytetrafluoroethylene (PTFE).

Subsequently, the optical fiber yarn 1 passes through the plurality of ring guides 12, 14, 16 guiding the advancing direction, and then advances to the nozzle 18. In the general composite yarn processing apparatus, the nozzles usually act to entangle the fibers by injecting high pressure air, but in the present invention, the nozzles 18 do not inject high pressure air, but simply provide a stable tension to the optical fiber yarn 1. It serves to support the yarn (1). The nozzle 18 is typically a hollow triangular column or cylinder made of cemented carbide. The optical fiber yarn 1 is stably tensioned while being supported by the inner surface of the nozzle 18 while passing through the inside of the nozzle 18. At this time, the incidence angle θ of the optical fiber yarn 1 entering the nozzle 18 is defined as an angle formed by the optical fiber yarn 1 with the horizontal plane on the inlet side of the nozzle 18, and the angle is preferably 10 ° to 40 °. . If this angle is smaller than 10 °, the tension imparted to the optical fiber yarn 1 becomes too small and the feeding speed of the optical fiber yarn 1 may become inconsistent. When this angle is larger than 40 degrees, the tension given to the optical fiber yarn 1 becomes too large, and it is easy to cut | disconnect the optical fiber yarn 1, and there exists a possibility that processability may be bad.

Subsequently, the optical fiber yarn 1 passes through the nozzle 18 and then passes through the ring guide 20 to the guide bar 22 provided with sand paper. The sand paper exerts a frictional force on the side surface of the optical fiber yarn 1 through friction, thereby removing the cladding layer of the optical fiber yarn 1. Thereby, the exposure window which exposes the core layer of the optical fiber yarn 1 is formed uniformly over the side surface of the optical fiber yarn 1.

Subsequently, the optical fiber yarn 1 in which the exposed window is formed passes through the guide bar 22 provided with sand paper, and then proceeds to the winding traverse 24. The winding traverse 24 uniformly divides the optical fiber yarn 1 from side to side while supplying it to the winding device 26, for example, a branch pipe, while reciprocating in a direction perpendicular to the traveling direction of the optical fiber yarn 1 having an exposed window. The optical fiber yarn 1 on which the scratch processing is completed on the winding device 26 is assisted to be wound to a uniform thickness.

However, the present inventors in the scratch processing method of the optical fiber yarn according to a preferred embodiment of the present invention, the supply speed of the optical fiber yarn 1, the incident angle θ of the optical fiber yarn 1 entering the nozzle 18 and the speed of the winding traverse 24 It was found that by adjusting at least one factor selected from among them, the amount of removal of the cladding layer of the optical fiber yarn 1 can be adjusted. Specifically, the inventors can surprisingly minimize the amount of abrasion of the core layer of the optical fiber yarn 1 by controlling the above factors so that the tensile strength of the optical fiber yarn 1 is 90% or more, preferably 95% or more, More preferably 98% or more. For example, when the total diameter of the optical fiber yarn 1 is 250 to 500 μm and the cladding layer thickness of the optical fiber yarn 1 is 10 to 50 μm, the incident angle θ of the optical fiber yarn 1 entering the nozzle 18 is determined. 10 to 40 degrees, the feed rate of the optical fiber yarn 1 is 5 to 40 m / min, the speed of the winding traverse 24 is adjusted to 5 to 30 dsm, and the roughness of the sand paper to # 80 to # 400, The tensile strength of the optical fiber yarn 1 is 90% or more, preferably 95% or more, more preferably 98% because the cladding layer can be continuously and effectively removed while minimizing the amount of wear of the core layer of the optical fiber yarn 1. The above can be maintained.

If the feed rate of the optical fiber yarn 1 is less than 5 m / min, productivity decreases, and if it exceeds 40 m / min, the trimming is frequent, resulting in poor processability, and the contact area and contact time of the side surface of the optical fiber yarn 1 and sand paper This tends to decrease and the amount of clad layer removal is not sufficient. If the speed of the winding traverse 24 is less than 5 dsm, the tension is lowered and the contact area is lowered, so that the clad layer removal amount is not sufficient. On the contrary, if the speed of the traverse 24 is exceeded, the tension is too large and the contact area is increased so much that the clad layer removal amount is increased. This tends to be too much. In particular, as is apparent from the results of the following examples, it was unexpected that the traverse speed had a sensitive effect on the amount of cladding layer removed. If the roughness of the sand paper is rougher than the case of # 80, the sand paper is too rough and the core layer tends to be erased. If the sand paper is not rougher than # 400, the removal amount may be too small.

Hereinafter, the specific implementation method of the scratch processing method of the optical fiber yarn of the present invention through the embodiments of the present invention will be described in more detail. This embodiment is for illustrative purposes, needless to say, the scope of the invention is not limited thereby.

Example

Using the scratch processing apparatus of the optical fiber yarn shown in FIG. 1, the cladding layer of the optical fiber yarn was continuously removed and wound around the branch pipe while changing the optical fiber yarn feed speed and traverse speed. The optical fiber yarns used were plastic optical fiber yarns (POF) having a diameter of 250 μm (POF 250) and 500 μm (POF 500) sold by TORAY, Japan. This is an optical fiber yarn whose core layer is made of PMMA and the cladding layer (thickness: about 10 to 15 µm) is made of PTFE.

The angle of incidence of the optical fiber yarn entering the nozzle was maintained in the range of 20 ° to 30 °, and the sand paper used was # 180.

Comparative Example

Using a scratch processing apparatus of the optical fiber yarn shown in Figure 1 using a device and method as in the embodiment, the core layer is made of PMMA and the cladding layer (thickness: about 10 ~ 15 μm) of 125μm diameter plastic made of PTFE Scratch processing was performed on optical fiber yarn (POF) (manufacturer: Toray Industries, Japan, product number:). However, the plastic optical fiber yarn had a weak yarn strength and thus poor processability, which prevented continuous scratch processing.

<Test Method>

Optical fiber ( POF ) Side emission rate measurement

One end of a 50 cm long optical fiber was fastened to a measuring jig connected to an LED backlight unit (driving voltage: 12 V) in the dark room, and the other end was connected to the other measuring jig. The brightness of the light emitted from the other end was measured using a CS-200 luminance meter (manufactured by Minol Corporation, Japan) at a distance of 15 cm from the other end of the optical fiber yarn. At this time, the other end of the optical fiber yarn was located at the central measurement focus of the luminance meter.

Reference brightness in the case of four samples of optical fiber diameter of 500μm in the case of the optical fiber yarn sample of 470cd / m ^2, 250μm diameter, was fixed to 400cd / m ^2.

After turning on the LED switch and confirming that the light enters the luminance meter lens, the measurement button was pressed to measure the luminance emitted at the other end of the optical fiber. The above procedure was repeated three times to take an average value.

From the luminance value measured at one end of the 50 cm long optical fiber yarn, the side emission rate of the optical fiber yarn of 1 meter length was calculated using the following equation:

Side light emission ratio (%) = (I0 - I1) / I0 * 100 * (1 + I1 / I0).

I0 represents the incident light luminance at the end of the optical fiber yarn connected to the LED backlight unit, I1 represents the luminance measured at the other end of the 50 cm long optical fiber yarn (opposite end of the optical fiber yarn connected to the LED backlight unit), respectively (1 + I1 / I0) is a conversion factor that takes into account the optical loss rate at the end of the optical fiber yarn 1 meter away.

Optical fiber ( POF ) The tensile strength  Measure

Tensile strength of the optical fiber yarn samples was measured using a tensile strength tester (manufacturer: Samhwan Technology Co., Ltd.) according to the conditions and methods specified in KS K 0520.

Optical fiber ( POF ) Side emission rate test result

Table 1 below shows the change in the side emission rate according to the feed rate and traverse speed of the POF 250.

Four
(mpm)
Traverse speed
(dsm) 5 10 20 30 5 75.5% 66.0% 64.6% 56.8% 10 90.6% 90.3% 72.9% 66.5% 20 98.4% 93.3% 92.5% 90.2%

Referring to Table 1, in the case of a fiber optic fiber having a diameter of 250 μm, the side emission rate is greatly influenced by the traverse speed when the cladding layer is removed. It exceeded.

FIG. 3 is a graph showing a change in luminance at the end of an optical fiber yarn after scratching with respect to a change in the winding traverse speed in a specific yarn feed speed range in the scratch processing of an optical fiber yarn having a diameter of 250 µm. 3, 5, 10, 20, and 30 in the figure represent yarn feed rates in mpm.

4 is a graph showing a change in luminance at the end of an optical fiber yarn after scratching with respect to a change in the winding speed in a specific winding traverse speed range in scratch processing of an optical fiber yarn having a diameter of 250 µm. In Fig. 4, 5, 10, and 200 in the drawings represent traverse speeds in dsm.

Referring to FIG. 3, as the winding traverse speed increases, the luminance at the end of the optical fiber yarn decreases, so that the amount of side light emission increases. Referring to FIG. 4, as the winding speed increases, the luminance at the end of the optical fiber yarn increases, so that the amount of side light emission decreases.

Table 2 below shows the change in the side emission rate according to the change in feed rate and traverse speed of the POF 500.

Four
(mpm)
Traverse speed
(dsm) 5 10 20 30 5 97.1% 96.4% 96.2% 95.5% 10 99.9% 99.3% - - 20 99.9% 99.9% 99.9% -

Referring to Table 2, it can be seen that the optical fiber yarn having a diameter of 500 μm is unexpectedly greatly affected by the traverse speed when the cladding layer is removed. In the case of the yarn feed rate of 40 mpm or less and the traverse speed of 5 sd or more, the side emission rate of 95% or more was obtained. Therefore, when pursuing high productivity, 30mpm yarn feed rate and traverse speed of 5dsm are most suitable.

FIG. 9 is a graph showing a change in luminance at the end of an optical fiber yarn after scratching against a change in winding traverse speed in a specific yarn feed speed range in the scratch processing of an optical fiber yarn having a diameter of 500 µm. In FIG. 9, 5, 10, and 20 represent yarn feed rates.

FIG. 10 is a graph showing a change in luminance at the ends of optical fiber yarns after scratching with respect to a change in winding speed in a specific winding traverse speed range in scratch processing of an optical fiber yarn having a diameter of 500 µm. In FIG. 10, 5, 10, and 200 in the figure indicate the traverse speed.

9 and 10, it can be seen that even in the case of an optical fiber yarn having a diameter of 500 μm, a similar tendency is observed in FIGS. 3 and 4 with respect to the optical fiber yarn having a diameter of 250 μm.

Optical fiber ( POF ) The tensile strength  Test result

Table 3 shows the tensile strength retention (%) test results of the optical fiber yarn (POF 250) of 250μm diameter scratched by the method and conditions described above. The tensile strength of POF 250 before scratching was 10.53 cN / tex.

(Unit: cN / Tex,%) Speed (mpm)

Traverse speed
(dsm) 5 10 20 10 9.35, 88.8% 10.3, 97.8% 10.50, 99.7% 20 10.37, 98.5% 10.51, 99.8% 10.25, 97.3%

Referring to Table 3, although the tendency of the yarn feed rate and the winding traverse speed is small, it can be seen that the tensile strength can be adjusted to almost 100% by controlling the yarn feed rate and the winding traverse speed well. In particular, as a result of measuring the tensile strength of the sample over 90% of the side emission rate, all showed a tensile strength retention of 80% or more.

Optical fiber ( POF A) emission and appearance observation

FIG. 5 is a photograph showing end emission taken by connecting an LED backlight unit (driving voltage: 12V) to an unprocessed optical fiber yarn (POF 250) having a diameter of 250 μm in a dark room. FIG. 6 is a photograph showing side light emission obtained by connecting an optical fiber yarn (POF 250) LED backlight unit (driving voltage: 12V) having a diameter of 250 µm scratched in a dark room. In the case of FIG. 5, light emission is observed only at the end, but in the case of FIG. 6, it can be seen that light is emitted from the side surface. In the case of the scratched optical fiber yarn of 250㎛ (POF 250), the side light emission could be confirmed from the side of the LED backlight unit 1 meter away.

FIG. 7 is a scanning magnification micrograph at a magnification of 40 times showing the side appearance of an unprocessed 250 μm diameter optical fiber yarn (POF 250). FIG. FIG. 8 is a scanning transfer microscope photograph with a magnification of 40 times showing the side appearance of a scratched optical fiber yarn (POF 250) having a diameter of 250 µm. 7 and 8, it can be seen that the exposure window is uniformly formed on the side surface of the optical fiber yarn (POF 250) by scratch processing.

FIG. 11 is a 40 times magnification scanning transfer micrograph showing the lateral appearance of an unprocessed 500 μm diameter optical fiber yarn (POF 500). FIG. FIG. 12 is a scanning transfer microscope photograph with a magnification of 40 times showing the side appearance of a scratched optical fiber yarn (POF 500) having a diameter of 500 µm. 11 and 12, it can be seen that the exposure window is uniformly formed on the side surface of the optical fiber yarn (POF 500) by scratch processing.

100: scratch processing device of optical fiber yarn
1: fiber optic yarn feeder
12, 14, 16, 20: ring guide
18: nozzle
22: Guide bar with sand paper
24: winding traverse

Claims (7)

Continuously supplying an optical fiber yarn comprising a core layer and a cladding layer surrounding the core layer;
Pass through a plurality of ring guides for guiding the advancing direction of the supplied optical fiber yarns, nozzles for supporting the optical fiber yarns to stably provide tension to the optical fiber yarns, guide bars provided with sand paper, and guide bars provided with sand paper. It receives the optical fiber yarn and distributes it evenly from side to side and feeds it to the winding device to continuously pass the winding traverse assisting the winding and apply frictional force to the optical fiber yarn using the sand paper to remove the cladding layer of the optical fiber yarn. Thereby forming an exposed window exposing a core layer of the optical fiber yarn on a surface of the optical fiber yarn; And
The scratch processing method of the optical fiber yarn comprising winding the optical fiber yarn having the exposure window. The method of claim 1, wherein the removal amount of the cladding layer of the optical fiber yarn is adjusted by adjusting at least one factor selected from a supply speed of the optical fiber yarn, an incident angle of the optical fiber yarn entering the nozzle, and a speed of the winding traverse. Scratch processing method of an optical fiber yarn, characterized in that. 3. The scratch processing according to claim 2, wherein the angle of incidence of the optical fiber yarn entering the nozzle is defined as an angle at which the optical fiber yarn forms a horizontal plane on the nozzle inlet side, and the angle is 10 ° to 40 °. Way. According to claim 2, wherein when the total diameter of the optical fiber yarn is 250 to 500㎛ and the cladding layer thickness of the optical fiber yarn is 10 to 50㎛, the feeding speed of the optical fiber yarn is 5 to 40 m / min, the winding The traverse speed is a scratch processing method of the optical fiber yarn, characterized in that 5 to 30 dsm. The scratch processing method of claim 1, wherein the sand paper has a number of # 80 to # 400. The method of claim 1, wherein the core layer is made of quartz or polymethyl methacrylate, and the cladding layer is made of a fluorine-based polymer resin. A supply device for continuously supplying an optical fiber yarn comprising a core layer and a cladding layer surrounding the core layer;
A plurality of ring guides for guiding a traveling direction of the supplied optical fiber yarn;
A nozzle for supporting the optical fiber yarn so that tension is stably applied to the optical fiber yarn that has passed through at least one of the plurality of ring guides;
A guide bar provided with sand paper for forming an exposed window exposing the core layer of the optical fiber yarn by applying friction to the optical fiber yarn passing through the nozzle to remove the cladding layer of the optical fiber yarn;
A winding traverse that receives the optical fiber yarn that has passed through the guide bar on which the sand paper is installed, and evenly distributes the optical fiber yarn from side to side to supply the winding device; And
The scratch processing apparatus of the optical fiber yarn containing the winding apparatus which winds up the said optical fiber yarn which passed the said winding traverse.

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