JPH03259202A - Optical fiber - Google Patents
Optical fiberInfo
- Publication number
- JPH03259202A JPH03259202A JP2058319A JP5831990A JPH03259202A JP H03259202 A JPH03259202 A JP H03259202A JP 2058319 A JP2058319 A JP 2058319A JP 5831990 A JP5831990 A JP 5831990A JP H03259202 A JPH03259202 A JP H03259202A
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- thickness
- optical
- rubber
- optical connector
- 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.)
- Pending
Links
- 239000013307 optical fiber Substances 0.000 title claims abstract description 32
- 239000000463 material Substances 0.000 claims abstract description 37
- 230000003287 optical effect Effects 0.000 claims abstract description 19
- 239000011347 resin Substances 0.000 claims abstract description 8
- 229920005989 resin Polymers 0.000 claims abstract description 8
- 238000005253 cladding Methods 0.000 claims description 16
- 239000013013 elastic material Substances 0.000 claims description 12
- 239000011162 core material Substances 0.000 claims description 8
- 238000000576 coating method Methods 0.000 claims description 7
- 239000011248 coating agent Substances 0.000 claims description 6
- 229920001971 elastomer Polymers 0.000 abstract description 6
- 239000005060 rubber Substances 0.000 abstract description 6
- 239000000835 fiber Substances 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 6
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 2
- 239000011247 coating layer Substances 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 229920006311 Urethane elastomer Polymers 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 229920000800 acrylic rubber Polymers 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229920005549 butyl rubber Polymers 0.000 description 1
- 229920006235 chlorinated polyethylene elastomer Polymers 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 150000001993 dienes Chemical class 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- -1 ethylene-propylene-butadiene Chemical class 0.000 description 1
- 229920001973 fluoroelastomer Polymers 0.000 description 1
- 229920003049 isoprene rubber Polymers 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 108091008695 photoreceptors Proteins 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 229920006027 ternary co-polymer Polymers 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、光ファイバに関する。更に詳しくは、共にゴ
ム状弾性体よりなるコア材およびクラッド材のクラッド
材表面に外側被覆材を設けた光ファイバに関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to optical fibers. More specifically, the present invention relates to an optical fiber having a core material and a cladding material, both of which are made of a rubber-like elastic body, and an outer covering material is provided on the surface of the cladding material.
共にゴム状弾性体よりなるコア材およびクラッド材のク
ラッド材表面にゴム状弾性体よりなる外側被覆材を設け
た光ファイバは、先に本出願人によって提案されている
（特開平１−２０６，３０７号公報）。An optical fiber in which an outer coating material made of a rubbery elastic material is provided on the surface of the cladding material of a core material and a cladding material both made of a rubbery elastic material has been previously proposed by the present applicant (Japanese Patent Laid-Open No. 1-206, Publication No. 307).
この外側被覆材は、外部からの保護の役目や変形（伸縮
、圧縮など）の際に破断のないような役割を果たしてい
る。This outer covering material plays a role of protection from the outside and a role of preventing breakage during deformation (expansion/contraction, compression, etc.).
ところで、光ファイバはそれ単体で用いられることは少
なく、発光体（光源）や受光体などの他の材料と接続し
て用いられることが多い。例えば第３図に示されるよう
に、光ファイバ１１を光コネクタ１２に取付けて接続す
るにしても、光コネクタは硬くてゴム状弾性を有するも
のではなく、従ってその変形時には、第４図に示される
ように、ゴム状弾性体部分と硬質材部分との接続部分１
３において、折れ曲がりが生じ易いという問題がみられ
る。By the way, optical fibers are rarely used alone, but are often used in connection with other materials such as light emitters (light sources) and photoreceptors. For example, as shown in FIG. 3, even if the optical fiber 11 is attached and connected to the optical connector 12, the optical connector is hard and does not have rubber-like elasticity. Connecting part 1 between the rubber-like elastic body part and the hard material part so that
In No. 3, there is a problem that bending easily occurs.
即ち、ゴム状弾性体部分では、それが曲がるとき全体的
に力が分散されるが、それと硬質材部分との境目では応
力集中を生じ、中のファイバの断面形状もそこだけつぶ
れて変形したり、あるいはクラックを生じたりするよう
になる。In other words, when the rubber-like elastic body part is bent, the force is dispersed throughout the body, but stress is concentrated at the boundary between it and the hard material part, and the cross-sectional shape of the fiber inside is also crushed and deformed there. , or cracks may occur.
本発明の目的は、共にゴム状弾性体よりなるコア材およ
びクラッド材のクラッド材表面に外側被覆材を設けた光
ファイバにおいて、それが光コネクタなどの硬質材部分
と接続されたとき、変形時にもその接続部に応力集中を
生せしめない光ファイバを提供することにある。An object of the present invention is to provide an optical fiber in which an outer covering material is provided on the surface of the cladding material of a core material and cladding material, both of which are made of a rubber-like elastic body, when the optical fiber is connected to a hard material part such as an optical connector, and when deformed. Another object of the present invention is to provide an optical fiber that does not cause stress concentration at its connection portion.
かかる本発明の目的は、共にゴム状弾性体よりなるコア
材およびクラッド材のクラッド材表面にゴム状弾性体ま
たは軟質樹脂よりなる外側被覆材を設けた光ファイバに
おいて、光コネクタと接続される末端部分の外側被覆材
の肉厚を末端側に向けて次第に厚くした光ファイバによ
って達成される。The object of the present invention is to provide an optical fiber in which an outer covering material made of a rubbery elastic material or a soft resin is provided on the surface of the cladding material of a core material and cladding material, both of which are made of a rubbery elastic material. This is achieved by means of an optical fiber whose outer cladding has a wall thickness that gradually increases toward the distal end.
図面の第１図は、本発明に係る光ファイバの一態様を光
コネクタと接続した状態で示したものであり、光ファイ
バ１は光コネクタ２と接続される末端部分３の外側被覆
材の肉厚を末端側に向けて連続的に次第に厚くしている
。末端側に向けて肉厚を厚くすることは、一般にはこの
ように連続的に行われるが、第２図に示される如く、断
続的に行うこともできる。FIG. 1 of the drawings shows one embodiment of the optical fiber according to the present invention in a state where it is connected to an optical connector. The thickness is gradually increased toward the distal end. Increasing the wall thickness toward the distal end is generally done continuously in this way, but it can also be done intermittently as shown in FIG.
このような光フアイバ末端部分の肉厚を次第に厚くし、
テーパ部分を形成される方法としては、例えば次のよう
な方法がとられる。By gradually increasing the thickness of the end portion of such an optical fiber,
For example, the following method can be used to form the tapered portion.
（１）クラッド材表面にゴム状弾性体または軟質樹脂よ
りなる外側被覆層を溶液コーティング法により形成させ
る際、テーパ形成部分だけそのコーテイング液量を増加
させる方法
（２）連続的あるいは断続的に、次第に肉厚を厚くした
熱収縮性チューブをテーパ形成部分に嵌挿し、熱収縮さ
せる方法
これらのテーパ部分がゴム状弾性体で形成される場合に
は、ゴム状弾性体として、例えばフッ素ゴム、エチレン
・プロピレン（・ジエン）共重合ゴム、スチレン・ブタ
ジェン共重合ゴム、アクリロニトリル・ブタジェン共重
合ゴム、ブチルゴム、アクリルゴム、ヒドリンゴム、シ
リコーンゴム、ウレタンゴム、塩素化ポリエチレンゴム
、クロロプレンゴム、イソプレンゴムなどが、加硫され
た状態で用いられる。また、テーパ部分が軟質樹脂で形
成される場合には、軟質塩化ビニル樹脂などが用いられ
る。(1) A method in which the outer coating layer made of a rubber-like elastic material or a soft resin is formed on the surface of the cladding material by a solution coating method, and the amount of the coating liquid is increased only in the taper forming part (2) Continuously or intermittently, A method of inserting a heat-shrinkable tube with a gradually thicker wall into the tapered portion and heat-shrinking it. When these tapered portions are formed of a rubber-like elastic material, the rubber-like elastic material may be made of, for example, fluororubber or ethylene.・Propylene (diene) copolymer rubber, styrene-butadiene copolymer rubber, acrylonitrile-butadiene copolymer rubber, butyl rubber, acrylic rubber, hydrin rubber, silicone rubber, urethane rubber, chlorinated polyethylene rubber, chloroprene rubber, isoprene rubber, etc. Used in vulcanized state. Furthermore, when the tapered portion is formed of a soft resin, a soft vinyl chloride resin or the like is used.
前記特開平１−２０６，３０７号公報に記載される如き
ゴム状弾性体で形成されるコア材およびクラッド材より
なるファイバに対し、例えば１ｍｍ径のファイバに対し
外側被覆層は約０．３〜１．０ｍｍの肉厚で形成される
が、テーパ部分は一般にファイバ径に対して約１０〜１
００倍の長さの部分に設けられ、またそのテーパの度合
いは、外側被覆材を含めたファイバの弾性率に対し、テ
ーパ部分末端の弾性率が約１．３〜３０倍、好ましくは
約１．３〜１０倍となるような肉厚に設定される。テー
パの度合いがこれより小さいと、曲げなどによる応力集
中を防ぎきることができず、一方これより大きくすると
、逆に硬くなりすぎて、もはやファイバの弾性率を徐々
に変化させるとはいい難い状態となる。For a fiber made of a core material and a cladding material made of a rubber-like elastic body as described in JP-A-1-206,307, for example, the outer coating layer has a diameter of about 0.3 to 1 mm for a fiber with a diameter of 1 mm. Although it is formed with a wall thickness of 1.0 mm, the tapered portion is generally approximately 10 to 1 mm thick relative to the fiber diameter.
The degree of taper is such that the elastic modulus at the end of the tapered portion is about 1.3 to 30 times, preferably about 1 The wall thickness is set to be 3 to 10 times larger. If the degree of taper is smaller than this, it will not be possible to completely prevent stress concentration due to bending, etc. If it is larger than this, on the other hand, it will become too hard and it is no longer possible to gradually change the elastic modulus of the fiber. becomes.
共にゴム状弾性体よりなるコア材およびクラッド材のク
ラッド材表面に設けられる外側被覆材の末端部分の肉厚
を末端側に向けて次第に厚くし、テーパ部分を形成させ
ることにより、ゴム状弾性体または軟質樹脂よりなるテ
ーパ部分で応力集中を避けることができ、光コネクタな
どの硬質材部分と接続された場合にも折れ曲りを生ぜず
、即ち光ファイバの折れ曲りによる伝送率の著しい低下
を避けることができる。このため、本発明に係る光ファ
イバは、ライトガイド、光センサなどに有効に用いるこ
とができる。By gradually increasing the thickness of the end portion of the outer covering material provided on the surface of the cladding material of the core material and cladding material, both of which are made of a rubbery elastic material, toward the end side and forming a tapered portion, the rubbery elastic material is Alternatively, the tapered part made of soft resin can avoid stress concentration, and will not bend even when connected to a hard material part such as an optical connector. In other words, a significant drop in transmission rate due to bending of the optical fiber can be avoided. be able to. Therefore, the optical fiber according to the present invention can be effectively used for light guides, optical sensors, and the like.
次に、実施例について本発明を説明する。 Next, the present invention will be explained with reference to examples.
実施例１〜２、比較例
コア材およびクラッド材が共にアクリル系ゴム状弾性体
よりなるファイバ（直径１ 、００ｍｍ）を、ＥＰＤＭ
（エチレン−プロピレン−ブタジエン３元共重合体ゴム
）の２５重量％ｎ−ヘキサン溶液（粘度３５００ｃｐｓ
、２２℃）中に浸漬し、 ２０ｃｍ／分の速度で引き上
げる操作を３回くり返し、外側被覆材を膜厚３００μ＋
ａ（０，３ｍｍ）で形成させた光ファイバを得た。Examples 1 and 2, Comparative Example A fiber (diameter 1.00 mm) in which the core material and cladding material are both made of an acrylic rubber-like elastic material was
(ethylene-propylene-butadiene ternary copolymer rubber) in 25% by weight n-hexane solution (viscosity 3500 cps
, 22°C) and pulling it up at a speed of 20 cm/min three times to reduce the outer coating material to a film thickness of 300 μ+.
An optical fiber formed of a (0.3 mm) was obtained.
（実施例１）
上記光ファイバの両端部の末端から５０ｍｍの部分を５
片側ずつＥＰＤＨの２２重量％ｎ−ヘキサン溶液（粘度
２６００ＣＰＳ、２２℃）中に浸漬して引き上げ、次に
４９１１ｍ、４８ｍｍ、・・・・、２ｍｍ、 １＋ａｍ
と浸漬深さを順次変えることで、末端部分の外側被覆材
全肉厚を２．５＋ｕａ迄連続的に高めたテーパ部分を両
端部に形成させ、その部分を光コネクタと接続させた。(Example 1) A portion of 50 mm from the end of both ends of the above optical fiber was
One side at a time was immersed in a 22% by weight n-hexane solution of EPDH (viscosity 2600CPS, 22°C) and pulled up, then 4911m, 48mm, ..., 2mm, 1+am.
By sequentially changing the immersion depth and the immersion depth, tapered portions were formed at both ends in which the total thickness of the outer coating material at the end portion was continuously increased to 2.5+UA, and the tapered portions were connected to optical connectors.
（実施例２）
連続テーパ状の肉厚を有する長さ５０ｍｍの軟質塩化ビ
ニル樹脂製熱収縮性チューブ（内径１．８■、最小肉厚
０．２ａ＋ｍ、最大肉厚２．０ｍｍ）を前記光ファイバ
の両端部末端部分にかぶせ、それぞれ光コネクタと接続
した後、１００℃で約１０分間加熱してチューブを熱収
縮させ、膜厚０ 、３＋＋ｍの外側被覆材の上に最小肉
厚０．１ｍｍ、最大肉厚１．８■のテーパ部分を形成さ
せた。(Example 2) A heat-shrinkable soft vinyl chloride resin tube with a continuous tapered wall thickness and a length of 50 mm (inner diameter 1.8 mm, minimum wall thickness 0.2 a + m, maximum wall thickness 2.0 mm) was exposed to the light described above. After covering the end portions of both ends of the fiber and connecting them to optical connectors, the tube is heated at 100°C for about 10 minutes to heat shrink it, and a minimum thickness of 0.1 mm is placed on top of the outer covering material with a film thickness of 0 and 3++ m. , a tapered portion with a maximum thickness of 1.8 cm was formed.
（比較例） 前記光ファイバを、そのまま光コネクタと接続させた。(Comparative example) The optical fiber was directly connected to an optical connector.
以上の各実施例および比較例の光コネクタと接続された
長さ１ｍの光ファイバを、光コネクタにより光パワーメ
ータおよび光源をそれぞれ取り付け、光量を測定すると
、光ファイバを１ｍぴんと張った状態では、各実施例、
比較例共６０〜８０μＶの出力を示したが、光源を光パ
ワーメータ側に５０ｃｒｘ寄せ、光ファイバを波打った
状態にしたとき、各実施例で検出される光量変化はいず
れも１μＶ以下であるのに対し、比較例では５〜１０μ
Ｗの光量変化がみられた。An optical power meter and a light source were attached to the 1 m long optical fibers connected to the optical connectors of the above embodiments and comparative examples, respectively, and the amount of light was measured. When the optical fibers were stretched 1 m tautly, Each example,
Both comparative examples showed an output of 60 to 80 μV, but when the light source was brought 50 crx closer to the optical power meter side and the optical fiber was made wavy, the light amount change detected in each example was less than 1 μV. On the other hand, in the comparative example, 5 to 10μ
A change in the amount of W light was observed.
また、光源迄の位置を１ｍ←→５０ｃ＋＋＋と変える操
作を１０００回行ったところ、各実施例の光ファイバに
ついては構造的に全く変化がみられなかったが、比較例
の光ファイバでは光コネクタの付根の部分が削れてしま
った。In addition, when the operation of changing the position to the light source from 1m←→50c+++ was performed 1000 times, no structural changes were observed for the optical fibers of each example, but for the optical fiber of the comparative example, the optical connector The base part has been scraped off.
第１図は、本発明に係る光ファイバの一態様を光コネク
タと接続した状態で示したものである。
第２図は、光ファイバの他の態様の斜視図である。
第３図は、従来の光ファイバを光コネクタと接続した状
態で示したものであり、第４図はそれの折曲状態図であ
る。FIG. 1 shows one embodiment of an optical fiber according to the present invention connected to an optical connector. FIG. 2 is a perspective view of another embodiment of the optical fiber. FIG. 3 shows a conventional optical fiber connected to an optical connector, and FIG. 4 shows a state in which it is bent.
Claims (1)
のクラッド材表面にゴム状弾性体または軟質樹脂よりな
る外側被覆材を設けた光ファイバにおいて、光コネクタ
と接続される末端部分の外側被覆材の肉厚を末端側に向
けて次第に厚くしてなる光ファイバ。 ２、外側被覆材の肉厚を連続的に末端側に向けて次第に
厚くしてなる請求項１記載の光ファイバ。 ３、外側被覆材の肉厚を断続的に末端側に向けて次第に
厚くしてなる請求項１記載の光ファイバ。[Claims] 1. An optical fiber in which an outer coating material made of a rubbery elastic material or a soft resin is provided on the surface of the cladding material of a core material and cladding material both made of a rubbery elastic material, which is connected to an optical connector. An optical fiber whose outer sheathing material at the end portion gradually becomes thicker toward the end. 2. The optical fiber according to claim 1, wherein the outer coating material has a thickness that gradually increases toward the distal end. 3. The optical fiber according to claim 1, wherein the thickness of the outer covering material is intermittently gradually increased toward the distal end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2058319A JPH03259202A (en) | 1990-03-09 | 1990-03-09 | Optical fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2058319A JPH03259202A (en) | 1990-03-09 | 1990-03-09 | Optical fiber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03259202A true JPH03259202A (en) | 1991-11-19 |
Family
ID=13080955
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2058319A Pending JPH03259202A (en) | 1990-03-09 | 1990-03-09 | Optical fiber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03259202A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5406641A (en) * | 1993-06-15 | 1995-04-11 | Rohm And Haas Company | Flexible light pipe, cured composite and processes for preparation thereof |
| US5485541A (en) * | 1993-06-15 | 1996-01-16 | Rohm And Haas Company | Cured composite, processes and composition |
-
1990
- 1990-03-09 JP JP2058319A patent/JPH03259202A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5406641A (en) * | 1993-06-15 | 1995-04-11 | Rohm And Haas Company | Flexible light pipe, cured composite and processes for preparation thereof |
| US5485541A (en) * | 1993-06-15 | 1996-01-16 | Rohm And Haas Company | Cured composite, processes and composition |
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