JPS5979204A - Manufacture of base material for optical transmission - Google Patents

Abstract

PURPOSE:To manufacture easily and with high efficiency a base material which is regular and also excellent in its density by making plural optical fiber strands pass through a through-hole of a die, giving a vibration, fixing the end part as one body, and forming an optical transmitting base material. CONSTITUTION:Plural through-holes 2 in the vertical direction are provided at constant intervals on a die 1. A guide pipe 5 which is necessary and has a sufficient length for erecting vertically and packing an optical fiber strand 4 is provided on the die 1. The strand 4 is packed into this pipe 5, giving a vibration by an exciter which is not shown in the figure, and is led to the througn-hole 2 of the die 1. In this case, a bottom plate is prepared on the bottom face of the die 1, and a strand group 6 is led downward in the lump by moving the bottom plate when the strand 4 is led to all the through-holes 2 of the die 1. The end part of this bundled-up strand group 6 is fixed by an adhesive 7, and the other end is also drawn out of the through-hole 2 of the die 1 and is fixed by the adhesive 7. Thus, an optical transmitting base material is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a base material for optical transmission, and more particularly to a method of manufacturing a base material for optical transmission in which a large number of original fiber strands are arranged densely and regularly.

[Technical background of the invention and its problems 1 When manufacturing an image guide for image transmission, the following method has conventionally been used. That is, for example, after using a thin original fiber wire with a diameter of more than 10 μm and filling it densely in the glass pipe Q,
A method of collapsing and heating and stretching to obtain a predetermined image guide.In order to minimize the formation of gaps between the fiber end faces that will become the image plane, the cross-sectional shape of the D-moon, which is made by bundling original fiber cores, is a regular hexagon. Otsu deshi, adjacent r
This is carried out by a method such as storing Th+ in a glass pipe in such a manner that they are in contact with each other, and obtaining a predetermined image and image through the same process as described above.
In both the former and latter methods, in order to arrange the base material, which is a bundle of optical fibers or fibers, inside the glass pipe, the arrangement may be disrupted at the point where it touches the inner circumferential surface of the glass pipe. Filling work must be done at work.

If the above-mentioned arrangement is disturbed or gaps remain, the transmission efficiency per unit area of the image guide decreases, and the image is undesirably divided at the gaps. In addition, manual filling of the gap is inefficient, and cutting accidents are likely to occur because the optical fiber wire has a minute outer shape. More importantly, the glass pipe as the bundle material melts and penetrates into each gap of the array to form a glass layer, which has the disadvantage of reducing the resolution of the image plane. .

[Purpose of the invention]

The present invention has been made based on the above circumstances, and uses a glass pipe etc. as a bundle material. [Summary of the Invention] That is, the present invention aims to provide a method for manufacturing a base material for optical transmission that can be manufactured in a process that allows for the production of a base material for optical transmission. On a die having a large number of arranged vertical holes, a large number of original fiber elements &! are passed through all the holes while applying vibration, and the ends of the original fiber elements that have passed through are integrated. This is a method for manufacturing an n-material for optical transmission, characterized in that the n-material for optical transmission is formed by fixing Gτ.

[Embodiment of the Invention] Hereinafter, one embodiment of the present invention will be described with reference to the drawings.The first figure shows a perspective view of the die used in the present invention, and the second figure shows a close-up view of the die used in the present invention. , showing its plan view.

In the same figure, the dice IK are arranged in regular L
A large number of vertical through holes 2 arranged in a τ pattern are provided. The arrangement of the through-holes 2 is, for example, a regular hexagon as shown in the figure.
When bundling them together, it is preferable that they are in contact with each other (tj, 11rrn are in close contact with each other to manufacture a high-resolution image guide), but the shape is not necessarily a regular hexagon, and any regular polygon is sufficient.

The dimensional positional relationship between one vertical piece of karako with a die IK 2 and the through hole 2 adjacent to this stone 2 is determined as follows. .

That is, as shown in FIG. 3, if the inner diameter of the through hole 2a is d, and the dimensions f and l- of the minimum thickness portion 3 formed between the through hole 2aK@the adjacent through hole 2b, then d The relationship 1 is set such that ≧L. This is to prevent the arrangement of the optical fiber group 1, which will be described later, from being disturbed.

[Above die] As shown in FIG. An optical fiber strand 4 having a predetermined outer diameter and length is filled inside while applying vibration of a predetermined magnitude using a vibrating device (not shown), and guided into the through hole 2 of the die.
In this case, there is a bottom plate (not shown) on the bottom of the die 1.
is prepared, and when the original fiber strands 4 are guided through all the through-holes 2 of the die 1, the bottom plate is moved vertically downward at I·, and the original fiber strands 6 are passed through the through-holes 2. Guide it all at once downwards.

The end of this group of optical fibers 6 is fixed with a disinfectant 7, etc., and the other end is also pulled out from the die 1 [2] and fixed with an adhesive hole 7, etc. in the same manner as described above. Get wood.

Next, the above-mentioned Example Q will be explained using specific numerical values.

A die with 217 circular through holes 2 with a diameter of 1.2 mm] A guide pipe 5'ff on the top: a die with a diameter of 1 mm. ? +,
7++φ.

Approximately 30 pieces of silica-based optical fiber strand 4 with a length of 500 mm
Fill 0 pieces, press the bottom of die 1 with the bottom plate, and use a commercially available pie break to press die 1 3000 times/? ? 1i +
1. Vibration was applied for 5 minutes.

After that, move the base plate downward with the bottom plate L, guide the original fiber group 6 out of the through hole 2, secure the end with epoxy resin, and lower the entire bottom plate with the screw υ to the optical fiber group 6. At the point where the tip part is 1 to 2 mats apart from the top surface of the die 1, the original fiber group 6 at the bottom of the die 1 is coated with epoxy resin in the same manner as described above, and then the whole is pulled out to obtain a base material for optical transmission. 3. The above-mentioned base material for optical transmission has no disordered alignment over the entire length and has extremely high density.Next, other examples of the present invention are shown in FIGS. 5 and 5. This will be explained based on FIG.

In the above embodiment, the optical fiber 4 was guided and the die 1 was one, but in this embodiment, two dies were used. That is, as shown in FIG. A supporting die 1 having a bottomed side L, 8 and having 7 flange portions 9 at the bottom is stacked on top of the die 1 with its arrangement matching,
The optical fiber strand 4 is filled onto the die 1 through the guide pipe 5 etc. in the same manner as in the above embodiment, and vibration is applied to the C fiber strand 4 via the dies 1 and 11 from the vibrating device f. , through hole 2 of die 1 and bottomed hole 8 of supporting die 11
The optical fiber wire 4 is guided inside. After that, support die 11
is moved downward as shown in FIG. 7 to open a gap between it and the die 1. The distance a between this die] and the supporting die ]] is a shape surrounded by a tangent line connecting the outer periphery of the intermediate part of the group of strands 6 of the SO element fin wire group 6 to the outer periphery of the through hole 2 of the die ], for example, a regular hexagon and a similar regular hexagon. A drawing die 10 having a two-part configuration with a rectangular through hole is fitted. Then, the drawing die 10 having the two-divided configuration is moved toward both ends of the optical fiber group 6 to vibrate the arrangement in the longitudinal direction.

Next, the die 1 and the support die 11 located at both ends of the optical fiber element +vi1 group 6 are removed, and the VCfi
After moving the diaphragm die 0 at both ends St, the optical fiber group 6 inside the diaphragm die 0 is fixed with a predetermined adhesive to obtain a base material for optical transmission.

Similar to the above, the above embodiment will be explained using specific numerical values.
A supporting die 11 having 1217 round bottomed holes 8' is placed over the support die 11 so that the arrangement of both is the same, and a quartz-based die with a diameter I 11aφ and a length 50t1ma is placed in the die 1 soil through a guide pipe 5. When filling approximately 300 fiber optic fibers 4, the die 1 and the support die 11K were pressed 3000 times/? using a commercially available pie breaker. +lln
Vibration was applied for 5 minutes.

Thereafter, the supporting die 1] is gently moved downward, and the distance ds f between the die 1 and the supporting die 1 is opened to such an extent that the upper end of the optical fiber group 6 cannot be pulled out from the upper die 1. Interval ds K drawing die 10 was inserted. This drawing die is 10'f! : They were moved in a direction Cτ away from each other, that is, in a direction Cτ toward both ends of the optical fiber group 6, and stopped at a distance of about 10 crn from both dice 1.11, and the arrangement therebetween was adjusted.

Next, the dies 1 and the supporting dies 11 at both ends are removed, and the diaphragm dies 10 are brought to both ends of the optical fiber group 6. Then, the inner circle 1 of the diaphragm dies 10 is fixed with glass solder, and the diaphragm The die 10 was removed to obtain a base material for optical transmission.

The above-mentioned base material for optical transmission has extremely high density with no alignment disorder over the entire length. A large number of raw fibers are guided onto a die having a large number of vertical holes arranged in a regular C pattern, and a vibration device is applied to the die to vibrate the die, so that an optical fiber bag is naturally formed into the die. The optical fibers that passed through the holes were bundled and fixed.
A regularly and densely crushed base material for optical transmission can be produced in a simple process and with high efficiency. .

Therefore, if an image guide is manufactured using the above-mentioned light transmission base material, a high-resolution image without defective parts can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the die used in the present invention, Fig. 2 is a plan view thereof, Fig. 3 is a partially cutaway sectional view taken along line A-A in Fig. 2, and Fig. 4 is a guide pipe. FIGS. 5 to 7 are perspective views showing a state in which optical fibers are filled with red fiber using the method of the present invention.
3H, Perspective view of die and supporting die all lying down, No. 6
The figure is a longitudinal sectional view of the support die, and FIG. 7 is a perspective view showing one manufacturing process of the optical transmission base material. 1...Dice, 2.2a, 2b...Through hole, 3
...Minimum thickness part, 4...Optical fiber wire, 5...
・Guide pipe, 6... Original fiber wire group, g...
Bottomed hole, 10... Drawing die, ]1... Supporting die. Application agent Patent attorney Kikuchi Gobu4 Akinobu Yamada

Claims (1)

[Claims] (υ A large number of original fiber blanks are guided onto a die having a large number of vertical holes arranged at regular intervals on a horizontal plane with regular centers of gravity, and the A method for producing a base material for optical transmission, characterized in that the base material for optical transmission is formed by passing through a through hole and integrally fixing the end portion of the group of original fiber strands that have passed through the hole to form a base material for optical transmission. (2) 1 Claim 1, characterized in that the minimum wall thickness l formed between the inner diameter d of the through hole and another through hole adjacent to the through hole has a relationship of /!≦d. The method for producing a base material for optical transmission as described in Section 3. (3) A large number of intervening fibers are guided onto a die having a large number of through holes regularly arranged at regular intervals on a horizontal plane, and vibrated. While passing through the through hole while giving A diaphragm die provided with a through hole having a shape is inserted, the die is moved toward both ends of the group of wires to arrange the wires, and the ends of the group of wires are integrally fixed to produce light. A method for manufacturing a base material for optical transmission, characterized by forming a base material for transmission. (4) A shape surrounded by a line connecting the outer periphery of the through hole of the die is a regular hexagon. A method for manufacturing a base material for optical transmission according to claim 1.