KR830000714B1 - Method for manufacturing bend fiber - Google Patents

Abstract

No content.

Description

Method for manufacturing bend fiber

1 is a structural diagram of a fiber element wire.

2 is a manufacturing apparatus of fiber wire.

3 is a perspective view of a bend fiber base material.

4, 5, and 6 are schematic diagrams of a single wire fiber arrangement.

FIG. 7 is a diagram showing an example of a method of fixing small wire fibers. FIG.

8 is a schematic diagram of a bend fiber spinning device.

9 and 10 are distribution charts of refractive indices of small fiber.

11 illustrates a method of forming a light absorption layer.

Fig. 12 is a diagram showing an example of distribution of refractions of a base material made by the VAD method.

13 is a cross-sectional view of a bend fiber reinforced with plastic.

The present invention relates to a method for producing a bend fiber. The bend fiber is classified into an image guide for transmitting an image and a light guide for simply transmitting optical energy. In order to reduce the distortion of the transmitted image, the image guide for transmitting the image is one-to-one corresponding to the positional relationship of the elementary fibers, which become pixels, on both sides of the incident side and the exit side. need.

On the other hand, since the light guide is merely for the transmission of optical power, the above arrangement is not necessary.

The present invention relates to a method for manufacturing an image guide for transmitting an image. The manufacture of a bend fiber as an image guide is, for example, as described in the Journal of the Korean Institute of Electrical Engineers No. 52-11 (97 vol. 11). It seems to be classified into lap method, multifiber, and fiber plate. As a method for producing an image guide, each one has been proposed, and it is difficult to manufacture a bend fiber that satisfies all the requirements for the minimum number, the manufacturable length, and the permeability.

The present invention relates to a method for manufacturing a bend fiber for use in image guide, and as a length produced, it is possible to produce a bend fiber having a number of 10 to 10 km in principle, rich in permeability, and sufficient number of pixels. will be.

According to the present invention, it is also possible to reduce the transmission loss of the single wire fiber as each pixel to 10 dB / km or less by selecting the base material to be each pixel, and compared with the bead fiber obtained in the related art. When the image having brightness is obtained, the transmission distance is drastically improved, and in that case, the image from the ultraviolet to the infrared can be transmitted due to the characteristics of the fiber used as the pixel, and the bend Fiber's application range is further expanded.

FIG. 1 shows the structure of a fiber element wire to be a pixel made using the present invention. In FIG. 1, (1) is ko, (2) is covering, and (3) is a light absorbing layer. The ball absorbing layer 3 may be provided on the outer periphery of each element wire. However, in the case of a fiber having no mineral water layer, a light absorbing rod that serves to absorb light separately may be introduced when the element wires are arranged.

FIG. 2 is a process for manufacturing small wire fibers of a bend fiber, and FIG. 2 (a) is a method of drawing a fiber by heating and softening a base material which is a small wire fiber, and FIG. 2 (b) is a double or triple crucible. The law shows a method of drawing a stranded fiber.

In Fig. 2 (a), (4) is the mother material, (5) is the jack portion, (6) is the radiation path, (7) is the fiber (8) is the winding day, (9) Is the feed screw, and 10 is the motor.

In Fig. 2 (b), 11 is a crucible, for example, made of platinum, quartz glass, or the like. Reference numeral 12 denotes a coglass, 13 denotes a coated glass, 14 denotes a light absorbing glass 15, a fiber 16 denotes a winding day.

FIG. 3 shows that the elementary fiber 17 obtained in FIG. 2 (a) or (b) is cut to an appropriate length and inserted into the quartz pipe 18 or the glass pipe.

In the state of FIG. 3, since the arrangement of the elementary fibers serving as the pixels is irregular, it is necessary to evenly arrange the arrangement of the elementary fibers.

FIG. 4 relates to a device for arranging an array of elementary fibers inserted into a quartz pipe or a glass pipe (19), wherein an element of the quartz or glass pipe (20) is an elementary fiber (21), a stopper (22), and a rotary jack (23). The silver hose 24 is the rectifying plate 25 is a rotary joint.

Here, the elementary fiber is aligned by water having a normal flow conveyed through the rotary joint 25 and the rectifying plate 24. At this time, it is important to integrate the quartz or glass tube and the rectifying plate and rotate them, and the fibers shaking in the tube are easily aligned by the operation.

The direction of rotation of the quartz or glass tube may be in the same direction. However, if the inversion is repeated, alignment of the elementary fibers becomes easy.

The stopper 21 prevents the dropping of the elementary fiber, but the friction coefficient of the elementary fiber is small, and the elementary fiber must be moved easily. As the material, for example, depron and metal are used.

FIG. 5 shows a second method of arranging elementary fibers. The ultrasonic vibration element 26 is added to the apparatus of FIG. 4 so as to further shorten the time required for alignment.

In the method of adding and aligning the ultrasonic vibrating element 26, sufficient alignment is possible even by a method of flowing water to seal one end of the quartz or glass tube 19 and inject water. In addition, the quartz or glass tube may be rotated, but sufficient alignment can be achieved by dragging time in the stopped state. Thus, the arrangement is simplified without rotating the water just by pouring it.

A third method of arranging fibers is shown in FIG. Reference numeral 29 denotes the elementary fiber, and each elementary fiber is integrated by bonding or welding at the position of 28 and inserted into the quartz or glass pipe 28. Integrated elementary fiber is coupled to the support jig 33 through the guide rod (30). (31) is the rectifying plate and (32) is the hose.

Water is poured from above the apparatus shown in FIG. 6, and the fibers are aligned by the flow of water. Means are provided for fixing the positional relationship between the aligned elementary fibers and the quartz or glass tube in order not to disturb the arrangement of the elementary fibers arranged in the quartz or glass tube by any of the methods of FIGS. 4, 5, and 6.

7 shows an example of a method of fixing the quartz or glass tube 35 to the soshin fiber 34. The burner 36 heats and softens the quartz or glass tube, resulting in surface tension. At least one diameter of the quartz tube or the glass tube is reduced to fix the array of the stranded fibers.

The operation up to FIG. 7 obtains an image guide bend fiber base material. When the diameter is reduced again by spinning, a bend fiber having a desired diameter is obtained.

FIG. 8 shows a method and apparatus for spinning the bendfiber base material obtained in FIG. 7, where 37 is a bendfiber base material, 38 is a radiant furnace, and 93 is a radiated bendfiber, 40 Dies for applying silver plastic, 41 for heating furnaces 42 for guide rollers, 43 for winding ends, 44 for jacks, 45 for feed screws, 46 for motors, 47 The silver suction container jig, 48 is a hose 49 is a vacuum pump, 50 is a plastic reinforcement bend fiber.

The base material 37 obtained in FIG. 7 is made of a radial axis diameter fiber 39, and then coated with a thermosetting or ultraviolet curable resin by an application die 40 before being brought into contact with another solid material. (Or ultraviolet curing furnace) to obtain plastic reinforced bend fiber.

By such a method, the bend fiber is protected from air, moisture, and other objects to have a sufficient strength to withstand use, and a bendable fiber is obtained. At this time, by vacuuming the upper portion of the bend fiber base material to reduce the pressure in the quartz or glass tube to reduce the space between the elementary fibers to be a pixel, it is possible to increase the density of the pixel. Since the outer diameter of the radiated bend fiber may be elliptical in the decompression state, the jack 44 may be a rotary jack.

In FIG. 8, although the resin may be applied and cured as described above immediately after spinning, the molten metal may be put into the coating die 40 to apply the metal.

Since the fixing method of the arrangement | positioning in FIG. 7 is only a diameter reduction of a quartz or a glass plate by a burner, the pressure reduction in the upper part of the base material described in FIG. 8 can be performed without a problem at all.

The effect by the present invention is as follows.

(1) Once inserted into the quartz or glass tube, the radially reduced elementary fiber is inserted, aligned, and radiated again, and a bend fiber of 10 km can be obtained at km of the blast furnace principle constant. You can get fiber.

(2) Since the aligned element wires are enclosed in the quartz or glass tube, the element wire fibers are protected and disconnection of the element wires can be prevented.

(3) Since the aligned wires were coated with quartz or glass tubes, and a plastic or metal reinforcing layer was constructed, a bend fiber having sufficient strength in use can be obtained.

(4) In order to spin and shrink the elementary base material once, insert it into a quartz or glass tube, and spin and shrink again, the outer diameter of the obtained bend fiber and the diameter of the pixel fiber can be arbitrarily selected within the range which can be manufactured.

(5) The diameter of the elementary fiber which becomes the blast furnace pixel by which the elementary fiber is radiated and reduced by 2 degrees can be made small enough, and a high quality image can be obtained.

(6) By using quartz or quartz glass for the elementary fiber and jacket, the image having the same brightness as compared with the conventional bend fiber, which may reduce the transmission loss of the elementary fiber to about 10dB / km or less. If so, its transmittable distance is dramatically increased.

(7) In the process of spinning and shrinking the bend fiber base material, the inside of the quartz or glass tube is reduced to bend fiber, so that the space between the elementary fibers can be reduced and the pixel density can be increased.

(8) There is no upper limit in principle because the number of the pixels is inserted into the quartz or glass tube with the radiated and reduced elementary fiber. Therefore, an image with extremely high resolution can be obtained.

Next, the elementary fiber used by this invention is described.

There are currently three types of optical fibers that transmit optical power or optical signals.

The first is fiber made of quartz or glass mainly made of quartz, the second is fiber made of glass of many components, and the third is fiber made of plastic. By the way, among these, the fiber applied to this invention is a glass fiber made mainly by the first and second quartz or quartz, and a fiber made of many components.

As a fiber made of quartz or quartz mainly glass, B-to- quartz is used as the coating 2 when quartz glass is used for the core 1 of FIG. In the case where a single toe quartz of an element such as Ge, P, Ti, Ga or the like or a hollow toe quartz of two or more elements thereof is used for the core, quartz glass or B dove quartz is used for the coating. do.

As a method of obtaining a base material of a small wire fiber mainly composed of these quartz or quartz glass, for example, the CVD method (Chemica 1 Vapor Deposition method), the VAD method (the vapor phase axis deposition method, the Vaporphase Axial Deposition method), the external method (外 付 法) and the like can be applied.

9 and 10 show examples of distributions of refractive indices of small wire fibers obtained by these methods.

9 shows a case in which a quartz jacket 53 is used when a quartz tube is used as a starting material, and 51 and 52 are cores and coatings, respectively. In the case of FIG. 9A, the B dove quartz is used for the covering 52, and the quartz is used for the core 51 and the jacket 53, and (b) (c) is used for the covering 52. In the case of using B dove quartz, a single dove such as Ge, P, Al, Ti, Ga, or highway of quartz is used for the core 51. The coating 52 is, of course, quartz glass (i.e., quartz jacket 53 and Same refractive index) may be used. The core may be a stepped distribution (a) or (b), or may be a refractive index distribution including a curved shape or a curve as shown in (c). That is, any distribution or if the core portion has a higher refractive index than the surroundings, it is sufficient to transmit light.

FIG. 10 shows the distribution of the refractive indices of a single wire fiber without the quartz jacket described in FIG. 9. In such a case, the core is compared with the coating 52 (quartz glass or B dove quartz glass) as shown in FIG. If the refractive index of (51) is high, it is sufficient, and the distribution of refraction of the core may also be a stepped or curved or curved distribution.

A method of forming a light absorbing layer on a single wire fiber or its base material having a distribution of refractive indices in FIG. 9 and FIG. 10 will be described.

The method of forming a light absorption layer is described.

The light absorbing layer combines adjacent optical fiber elements (pixels) to leak unnecessary light to the adjacent fibers, thereby preventing the image from blurring. However, the difference between the refractive index of the core and the coating of the co-absorption layer is large, and when the diameter of the core is relatively large, the leakage of light to the adjacent fibers is almost negligible and is not necessary.

If a light absorbing layer is required, the thickness must be made sufficiently thin, which is necessary to ensure that the ignition in the cross section of the bend fiber as the image guide can be as large as possible the area occupied by the core.

In order to form the light absorption layer on the elementary fiber or the base material mainly composed of quartz or quartz glass, there are three methods (1), (2) and (3) below.

(1) In the case of small-line fibers having the quartz jacket 53 shown in FIG. 9, the quartz jacket portion is used as the light absorption layer. For that purpose, a quartz tube corresponding to the quartz jacket portion may be used if the transmission loss of the material can be high.

In general, quartz tubes made of natural quartz are made of quartz as raw material. Therefore, the natural quartz tube can be used as the light absorbing layer. However, when the image transmission distance is short, the light absorption effect is small when used as it is, so that the light absorption of the quartz tube can be increased by the following methods (a), (b), (c) and (d).

A) For example, Al ₃ O ₂ etc. is coated on the outer surface of transparent quartz, such as Eralux-ST manufactured by Nobugo Quartz Co., Ltd. To increase the light absorption loss.

B) A method of making a quartz tube using colored crystals such as `` Amethyst '' in quartz, the raw material of quartz.

C) A method of coloring by irradiating ultraviolet rays, X-rays γ-rays, etc. to quartz tubes or ordinary quartz tubes with many impurities indicated in (A) and (B).

D) For example, a method in which a quartz tube in which Ti and other transition metals are turned off is used as it is, such as ozobley quartz tube manufactured by Toshiba Ceramic Co., Ltd., or a UV or X-ray γ ray is irradiated thereto.

Any of the methods (A)-(D) described above can be employed to increase the light absorption loss of the quartz tube itself and to be used as a light absorption layer.

(2) A metal coating is applied to the quartz part on the top of the quartz jacket 53 with the base material of the single wire fiber having the refractive index of Fig. 9 (a) (b) (c), and the quartz jacket according to the fiber compound Can be used as the light absorption layer. In such a case, the thickness of the coating may be thinner due to vapor deposition or the like in quartz or quartz glass and metal, and thus the physical properties of which are remarkably different in the high temperature state in which manufacture or processing is involved.

(3) A layer having a high light absorption is formed at the same time as or in a separate process of manufacturing the base material of the elementary fiber having the refractive index of FIGS. 10 (a), (b), and (c). Coloring of quartz glass by colored ions is suitable here. That is, colored quartz glass can be obtained by doping off transition metals such as Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Mo, Rh, La, Ce, Nd, and W.

Claim 11 also include those shown 1 yeeul the construction of the light absorption as a separate process on the surface of the 10 degrees of refractive index strand fiber base material 54 with bupo of SiCl ₄ in addition to halides (Mx) of the above-mentioned transition metal, H ₂ O ₂ is reacted with burner 55 to obtain a quartz light absorbing layer to which the transition metal is toned, for example, by flame hydrolysis.

Even in this case, the light absorption effect can be increased by irradiating ultraviolet X-rays γ-rays again as in the case of quartz tubes.

In addition, in the case of constructing a light absorbing layer with multi-component glass, the light absorption can be increased by appropriately adjusting the composition of the glass of other components, and it is relatively easy by the method described in FIG. Light absorbing layer can be constructed.

Hereinafter, embodiments of the present invention will be described.

The elementary fiber used here is a base material made by the above-mentioned VAD method, and the core portion uses the G and P clay-off quartz, and the coating portion uses B-to-off quartz and the distribution of the refractive index is shown in FIG. The difference Δn of the refractive indices is about 1.2%. As described above, the distribution of the refractive index does not necessarily have to be a perfect stepped shape and a gradient type, and as shown in FIG. 12, the maximum portion may be present in the refractive index. Subsequently, a base material having a diameter of about 20 mmØ having a refractive index distribution of FIG. 12 was inserted into a quartz tube manufactured by Doozhiba Ceramic Co., Ltd. Zeozone Free Co., Ltd. having an inner diameter of about 21 mmØ, and the method shown in FIG. The fiber of an outer diameter of about 100 μm was spun by the so-called tubing method. In the ozone-free quartz tube used here, about l00-150ppm Ti is turned off, and Ti4 + is changed to Ti3 + by heat treatment in the spinning process, and becomes hundreds to tens of thousands of dB / km in the wavelength range from ultraviolet to infrared.

The stranded fiber having the light absorption layer thus obtained was cut into a length of about 30 cm, and about 4000 pieces were inserted into a quartz tube having an inner diameter of about 20 mm, and the alignment method according to FIG. 6 and the fixing method according to FIG. 7 were constructed. And spinning in the same manner as in FIG. 8 to obtain a plastic reinforced fiber.

The fiber obtained here has a structure in which a quartz jacket 57 exists around the bend fiber 50 arranged in an airtight manner, as shown in FIG. Have The dimensions and number of pixels of the bend fiber made by the test here are as follows.

A very thick fiber with an outer diameter of 1 mm was easily broken at a bending radius of 150 mm in the absence of a plastic reinforcing layer. The plastic reinforcing layer was extremely high in strength that did not break up to a radius of curvature of 30 mm.

In the sample bend fiber described in Example, the diameter of the quartz jacket was about 1 mm. However, the diameter of the prototype bend fiber may be smaller by appropriately designing a lens system attached to both ends of the bend fiber.

In the case of a bend fiber having the same pixel fiber and the number of pixels, the radiation reduction of the bend fiber more than the outer diameter of the bend fiber obtained from the base material does not reduce the quality of the image and the density of the pixel.

In addition, the bend fiber having a smaller diameter further increases its permeability, and the length of the bend fiber obtained from the same base material increases dramatically. For example, as a base material (80 cm in length) of a single wire fiber having a diameter of 100 μm and inserted into a quartz tube having an inner diameter of 20 mm described in the embodiment, a bend fiber obtained by spinning a diameter dj of a quartz jacket at about 150 μm is actually 5,400 meters.

Claims (1)

A method of manufacturing a bend fiber, comprising inserting an elementary fiber, which becomes a pixel, into a quartz tube or a glass tube, arranging the elementary fiber while flowing water therein, and then radially reducing the elementary fiber and the tube.

Images