JPS634207A - Manufacture of image fiber - Google Patents
Manufacture of image fiberInfo
- Publication number
- JPS634207A JPS634207A JP61146850A JP14685086A JPS634207A JP S634207 A JPS634207 A JP S634207A JP 61146850 A JP61146850 A JP 61146850A JP 14685086 A JP14685086 A JP 14685086A JP S634207 A JPS634207 A JP S634207A
- Authority
- JP
- Japan
- Prior art keywords
- image fiber
- image
- heater
- temperature
- fiber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000835 fiber Substances 0.000 title claims abstract description 58
- 238000004519 manufacturing process Methods 0.000 title claims description 14
- 238000010438 heat treatment Methods 0.000 claims description 9
- 238000002844 melting Methods 0.000 claims description 8
- 230000008018 melting Effects 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 5
- 239000013307 optical fiber Substances 0.000 claims description 4
- 230000005855 radiation Effects 0.000 abstract description 7
- 238000005491 wire drawing Methods 0.000 abstract description 6
- 239000011521 glass Substances 0.000 abstract description 3
- 238000001816 cooling Methods 0.000 abstract 1
- 230000004927 fusion Effects 0.000 abstract 1
- 238000010583 slow cooling Methods 0.000 description 5
- 238000002834 transmittance Methods 0.000 description 4
- 230000007847 structural defect Effects 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012681 fiber drawing Methods 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
- C03B37/025—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor from reheated softened tubes, rods, fibres or filaments, e.g. drawing fibres from preforms
- C03B37/027—Fibres composed of different sorts of glass, e.g. glass optical fibres
- C03B37/02718—Thermal treatment of the fibre during the drawing process, e.g. cooling
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
- C03B37/025—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor from reheated softened tubes, rods, fibres or filaments, e.g. drawing fibres from preforms
- C03B37/028—Drawing fibre bundles, e.g. for making fibre bundles of multifibres, image fibres
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2205/00—Fibre drawing or extruding details
- C03B2205/55—Cooling or annealing the drawn fibre prior to coating using a series of coolers or heaters
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2205/00—Fibre drawing or extruding details
- C03B2205/56—Annealing or re-heating the drawn fibre prior to coating
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
この発明は画像直接伝送路として使用するイメージファ
イバの製造方法に関し、更に詳しくは耐放射線用イメー
ジファイバの製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a method of manufacturing an image fiber used as a direct image transmission path, and more particularly to a method of manufacturing a radiation-resistant image fiber.
〈従来の技術〉
イメージファイバを製造する場合は通常、複数本の光フ
ァイバを束ねて加熱炉内で、−旦加熱一体化しイメージ
ファイバプリフォームにした後、得られたイメージファ
イバプリフォームを（以下、「プリフォーム」という）
、更に線引き炉中で加熱溶融・線引きすることによりイ
メージファイバを作製している。<Conventional technology> When manufacturing an image fiber, normally, a plurality of optical fibers are bundled and heated in a heating furnace to form an image fiber preform. , "preform")
Furthermore, an image fiber is produced by heating, melting, and drawing in a drawing furnace.
従来、プリフォームをイメージファイバに線引きすると
きは第２図に示すように、線引き類ｌ内で加熱溶融した
プリフォーム２先端から引き出したイメージファイバ３
をキャプスタン４によって、−定の張力で線引きし、リ
ール５に巻き取るようにしていた。Conventionally, when drawing a preform into an image fiber, as shown in FIG.
is drawn with a constant tension by a capstan 4 and wound onto a reel 5.
〈発明が解決しようとする問題点〉
上述したイメージファイバの線引きは、−旦線引き炉１
中で加熱溶融したブリフォーム２の先端から線引きした
イメージファイバ３を外気に曝らした状態で室温まで急
降温するから、イメージファイバ３を構成する石英に構
造欠陥を多数発生させる。このため、放射線雰囲気下で
使用する場合には、構造欠陥に起因する格子欠陥にもと
すく着色中心が発生し、光の透過率が低下し、短時間で
イメージファイバが使用不能となる欠点があった。<Problems to be Solved by the Invention> The image fiber described above is drawn using a drawing furnace 1.
Since the image fiber 3 drawn from the tip of the heated and melted preform 2 is exposed to the outside air and rapidly cooled to room temperature, many structural defects are generated in the quartz forming the image fiber 3. For this reason, when used in a radiation atmosphere, colored centers occur in lattice defects caused by structural defects, reducing light transmittance and rendering the image fiber unusable in a short period of time. there were.
この発明は、従来のイメージファイバ製造方法における
このような欠点を除去するためになされたものであって
、加熱溶融されたプリフォームが、溶融温度から室温へ
のファイバ急冷（つまり、イメージファイバがプリフォ
ームの溶融温度から室温まで急冷されること）を避け、
徐冷却することによりイメージファイバに生じる構造欠
陥をなくすることができるイメージファイバの製造方法
を提供しようとするものである。The present invention was made to eliminate such drawbacks in the conventional image fiber manufacturing method. Avoid being rapidly cooled from the melting temperature of the reform to room temperature),
The object of the present invention is to provide a method for manufacturing an image fiber that can eliminate structural defects that occur in the image fiber by slow cooling.
く問題点を解決するための手段〉
上述の目的を達成するための、この発明のイメージファ
イバの製造方法は、光ファイバを複数本互いに密接させ
て束ねて加熱溶融し、イメージファイバプリフォームを
作製した後、さらに、線引き炉内において当該イメージ
ファイバプリフォームを加熱溶融、線引きしてイメージ
ファイバを作製するイメージファイバの製造方法におい
て、イメージファイバプリフォームを加熱溶融して線引
きするときに、加熱ヒータを介してイメージファイバを
イメージファイバプリフォームの溶融温度から室温まで
徐冷しながら線引きすることを特徴とするものである。Means for Solving the Problems> In order to achieve the above-mentioned object, the method for producing an image fiber of the present invention involves bundling a plurality of optical fibers closely together and heating and melting them to produce an image fiber preform. After that, in an image fiber manufacturing method in which an image fiber is produced by heating and melting the image fiber preform and drawing it in a drawing furnace, a heating heater is used when heating and melting the image fiber preform and drawing it. The method is characterized in that the image fiber is drawn while being gradually cooled from the melting temperature of the image fiber preform to room temperature.
く作 用〉
以上のように、加熱溶融イメージファイバプリフォーム
からイメージファイバを線引きする際、徐冷用ヒータを
介して室温まで徐々に降温させるので、イメージファイ
バを構成する石英の網目構造にひずみが発生することが
少なくなり、得られたイメージファイバが、放射線雰囲
気に曝らされても着色中心が発生するような欠陥を生じ
ることも少なくなる。As described above, when drawing an image fiber from a heat-molten image fiber preform, the temperature is gradually lowered to room temperature via a slow cooling heater, which causes strain in the quartz network structure that makes up the image fiber. This reduces the occurrence of defects such as colored centers even when the resulting image fiber is exposed to a radiation atmosphere.
〈実 施 例〉 つぎに、この発明の代表的な実施例について述べる。<Example> Next, typical embodiments of this invention will be described.
第１図は、この発明のイメージファイバの製造方法の実
施に使用する線引き装置である。この線引き装置は、線
引き炉１のイメージファイバ線引き方向下流に向けて、
順次第１高温（２，０００℃）ヒータ６、第２高温（１
，５００℃）ビータ７、第３高温（１，０００℃）ヒー
タ８、中高温（５００℃）ヒータ９および低温（２００
℃）ヒータｌＯを配置し、線引き炉１内において加熱溶
融したイメージファイバプリフォーム２から線引きした
イメージファイバ３をキャプスタン４により一定の張力
を加えてこれらの各ヒータ内を通して巻き取るようにし
たものである。FIG. 1 shows a drawing device used to carry out the image fiber manufacturing method of the present invention. This drawing device is directed downstream in the image fiber drawing direction of the drawing furnace 1.
In order, first high temperature (2,000℃) heater 6, second high temperature (1
, 500°C) beater 7, third high temperature (1,000°C) heater 8, medium high temperature (500°C) heater 9, and low temperature (200°C)
°C) heaters 10 are arranged, and the image fiber 3 drawn from the image fiber preform 2 heated and melted in the drawing furnace 1 is wound up through each of these heaters while applying a constant tension with the capstan 4. It is.
使用するイメージファイバプリフォーム２は、図示外の
加熱炉内で、多数の光ファイバを互いに密接させて束ね
たものを加熱し一体化したものを用いる。The image fiber preform 2 used is one in which a large number of optical fibers are bundled closely together and heated and integrated in a heating furnace not shown.
そして、ヒータ６．７．８．９、ｌＯの使用に当っては
、それぞれのヒータの温度を設定し、イメージファイバ
を線引きすれば所望のイメージファイバを作製すること
ができる。When using the heaters 6.7.8.9 and 1O, a desired image fiber can be produced by setting the temperature of each heater and drawing the image fiber.
従来方法のように、徐冷用のヒータを線引き炉（２００
０℃に加熱）の下流に設けない装置を通して製造したイ
メージファイバと、第１図に示す構成の徐冷用ヒータを
設けた線引き装置を通して製造したイメージファイバと
を、γ線雰囲気（＋０ＳＲ／ｈ）中においたところ、前
者は１０時間で光の透過率がほぼ半減したのに対し、後
者（第１図の線引き装置を通して製造したもの）は１０
０時間置装ても光の透過率は殆んど変らなかった。As in the conventional method, the heater for slow cooling is installed in a wire drawing furnace (200 mm
An image fiber manufactured through a device not installed downstream of heating (heated to 0°C) and an image fiber manufactured through a drawing device equipped with a slow cooling heater configured as shown in Fig. When placed inside the container, the light transmittance of the former decreased by almost half in 10 hours, while the latter (manufactured through the wire drawing device shown in Figure 1)
There was almost no change in the light transmittance even after the device was used for 0 hours.
〈発明の効果〉
以上の説明から明らかなように、この発明のイメージフ
ァイバの製造方法によれば、イメージファイバは急冷さ
れないので、生成するガラスの構造にひずみが生じない
ため、放射線雰囲気にさらされても、光の透過率の変化
が少なく、耐放射線用のイメージファイバを容易に製造
することができる。<Effects of the Invention> As is clear from the above description, according to the method for manufacturing an image fiber of the present invention, the image fiber is not rapidly cooled, so that no distortion occurs in the structure of the glass produced, so that it is not exposed to a radiation atmosphere. However, there is little change in light transmittance, and radiation-resistant image fibers can be easily manufactured.
第１図はこの発明のイメージファイバの製造方法の実施
に使用する線引き装置の概略構成図、第２図は従来のイ
メージファイバの製造方法に使用する線引き装置の概略
構成図である。
図面中、１・−線引き炉、
２−イメージファイバプリフォーム、
３−・イメージファイバ、
４−キャプスタン、
６．７，８．９．１０−徐冷用ピータ。FIG. 1 is a schematic diagram of a drawing device used in the method of manufacturing an image fiber of the present invention, and FIG. 2 is a schematic diagram of a drawing device used in the conventional method of manufacturing an image fiber. In the drawings, 1--drawing furnace, 2--image fiber preform, 3--image fiber, 4-capstan, 6.7, 8.9.10--peter for slow cooling.
Claims (1)
、イメージファイバプリフォームを作製した後、さらに
線引き炉内において当該イメージファイバプリフォーム
を加熱溶融線引きしてイメージファイバを作製するイメ
ージファイバの製造方法において、イメージファイバプ
リフォームを加熱溶融して線引きするときに、加熱ヒー
タを介してイメージファイバをイメージファイバプリフ
ォームの溶融温度から室温まで徐冷しながら線引きする
ことを特徴とするイメージファイバの製造方法。A method for manufacturing an image fiber, in which a plurality of optical fibers are bundled closely together and heated and melted to produce an image fiber preform, and then the image fiber preform is heated and melted and drawn in a drawing furnace to produce an image fiber. A method for manufacturing an image fiber, characterized in that when heating and melting an image fiber preform and drawing it, the image fiber is drawn while being slowly cooled from the melting temperature of the image fiber preform to room temperature via a heater. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61146850A JPH07107568B2 (en) | 1986-06-25 | 1986-06-25 | Method of manufacturing image fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61146850A JPH07107568B2 (en) | 1986-06-25 | 1986-06-25 | Method of manufacturing image fiber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS634207A true JPS634207A (en) | 1988-01-09 |
| JPH07107568B2 JPH07107568B2 (en) | 1995-11-15 |
Family
ID=15416955
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61146850A Expired - Fee Related JPH07107568B2 (en) | 1986-06-25 | 1986-06-25 | Method of manufacturing image fiber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07107568B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1205449A1 (en) * | 1999-05-27 | 2002-05-15 | Sumitomo Electric Industries, Ltd. | Production device and method for optical fiber |
| WO2018067519A1 (en) * | 2016-10-05 | 2018-04-12 | Corning Incorporated | Method of cooling an optical fiber to achieve low fictive temperature |
| CN114182369A (en) * | 2022-01-11 | 2022-03-15 | 中国科学院工程热物理研究所 | Preparation device and method of functional fiber |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5017851A (en) * | 1973-06-15 | 1975-02-25 | ||
| JPS6173904A (en) * | 1984-09-20 | 1986-04-16 | Nippon Telegr & Teleph Corp <Ntt> | Multicore optical fiber and its manufacture |
-
1986
- 1986-06-25 JP JP61146850A patent/JPH07107568B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5017851A (en) * | 1973-06-15 | 1975-02-25 | ||
| JPS6173904A (en) * | 1984-09-20 | 1986-04-16 | Nippon Telegr & Teleph Corp <Ntt> | Multicore optical fiber and its manufacture |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1205449A1 (en) * | 1999-05-27 | 2002-05-15 | Sumitomo Electric Industries, Ltd. | Production device and method for optical fiber |
| EP1205449A4 (en) * | 1999-05-27 | 2006-10-18 | Sumitomo Electric Industries | Production device and method for optical fiber |
| WO2018067519A1 (en) * | 2016-10-05 | 2018-04-12 | Corning Incorporated | Method of cooling an optical fiber to achieve low fictive temperature |
| CN109996770A (en) * | 2016-10-05 | 2019-07-09 | 康宁股份有限公司 | Make the cooling method to obtain low fictive temperature of optical fiber |
| US10961145B2 (en) | 2016-10-05 | 2021-03-30 | Corning Incorporated | Optical fiber with low fictive temperature |
| CN109996770B (en) * | 2016-10-05 | 2022-07-12 | 康宁股份有限公司 | Method for cooling optical fiber to obtain low fictive temperature |
| CN114182369A (en) * | 2022-01-11 | 2022-03-15 | 中国科学院工程热物理研究所 | Preparation device and method of functional fiber |
| CN114182369B (en) * | 2022-01-11 | 2023-06-16 | 中国科学院工程热物理研究所 | Preparation device and method of functional fibers |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07107568B2 (en) | 1995-11-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |