JPH07218744A - Juncture of light transmission body and matching material for juncture - Google Patents

Juncture of light transmission body and matching material for juncture

Info

Publication number
JPH07218744A
JPH07218744A JP6030798A JP3079894A JPH07218744A JP H07218744 A JPH07218744 A JP H07218744A JP 6030798 A JP6030798 A JP 6030798A JP 3079894 A JP3079894 A JP 3079894A JP H07218744 A JPH07218744 A JP H07218744A
Authority
JP
Japan
Prior art keywords
matching material
rubber
acrylate
synthetic resin
light transmission
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
Application number
JP6030798A
Other languages
Japanese (ja)
Inventor
Takanobu Ishibashi
孝伸 石橋
Noriaki Takeya
則明 竹谷
Yoshihisa Kato
善久 加藤
Hideki Asano
秀樹 浅野
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Cable Ltd
Original Assignee
Hitachi Cable Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Cable Ltd filed Critical Hitachi Cable Ltd
Priority to JP6030798A priority Critical patent/JPH07218744A/en
Publication of JPH07218744A publication Critical patent/JPH07218744A/en
Pending legal-status Critical Current

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  • Mechanical Coupling Of Light Guides (AREA)

Abstract

PURPOSE:To provide a novel matching material formed to enable attaching and detaching of synthetic resin light transmission bodies and a juncture of the light transmission bodies formed by using this material by lessening the coupling loss of the synthetic resin light transmission bodies to be connected. CONSTITUTION:This juncture of the synthetic resin light transmission bodies 1, 1' consisting of cores 4, 4' for transmitting light and clads enclosing these cores 4, 4' is formed by using the rubber-like matching material 14, in which one component of the rubber-like elastic material designed for matching is a polybutadiene acrylate 6, at a point for coupling at least >=2 of the light transmission bodies 1, 1'. The rubber-like matching material 14 to be used for the juncture of the light transmission bodies 1, 1' is formed by dissolving the polybutadiene acrylate 6 into an isopropyl acrylate and polymerizing the isoproyl acrylate in the soln.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】この発明は、接続する合成樹脂光
伝送体同士の結合損失を低減させ、かつ、合成樹脂光伝
送体の脱着を可能とした新規なマッチング材およびこれ
を使用した光伝送体の接続部に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel matching material capable of reducing coupling loss between synthetic resin light transmitters to be connected and enabling desorption of the synthetic resin light transmitter, and an optical transmission using the same. It is about the body connection.

【0002】[0002]

【従来の技術】従来の合成樹脂光伝送体同士の結合状態
を図面を参照して説明する。図4において、接続する左
右の合成樹脂光伝送体1,1´の先端にそれぞれ凸型コ
ネクタとなるプラグ2,2´を取り付け、中継コネクタ
3を介して結合する。このとき、合成樹脂光伝送体1,
1´同士の結合面5には空気層が存在し、この場合、合
成樹脂光伝送体1,1´のコア4,4´と空気層の屈折
率差が大きいため、結合部の合成樹脂光伝送体端面での
フレネル反射が生じ、かつ、該端面の平滑性が不十分な
ことから起因する光の散乱も生じ、合成樹脂光伝送体結
合部の伝送損失は大きなものになる。後者の合成樹脂光
伝送体端面の平滑性に起因する光の散乱は、接続する端
面をよく研磨することにより低減させることが可能であ
るが、それでもなお空気層が存在するため、結合部の伝
送損失を完全に低減させるには不十分なものとなってい
た。
2. Description of the Related Art A conventional connection state between synthetic resin optical transmission members will be described with reference to the drawings. In FIG. 4, plugs 2 and 2 ′ serving as convex connectors are attached to the tips of the left and right synthetic resin optical transmission bodies 1 and 1 ′ to be connected, respectively, and are coupled via a relay connector 3. At this time, the synthetic resin optical transmitter 1,
There is an air layer on the coupling surface 5 between the 1's, and in this case, since the refractive index difference between the cores 4, 4'of the synthetic resin optical transmitters 1, 1'and the air layer is large, the synthetic resin light of the coupling portion is Fresnel reflection occurs at the end face of the transmission body, and light is scattered due to insufficient smoothness of the end face, resulting in a large transmission loss of the synthetic resin optical transmission body coupling portion. Light scattering due to the smoothness of the end face of the latter synthetic resin optical transmission body can be reduced by polishing the end face to be connected well, but since there is still an air layer, the transmission of the coupling part is reduced. It was insufficient to completely reduce the loss.

【0003】このような結合損失を低減させる従来の方
法として、合成樹脂光伝送体1,1´のコア4,4´と
ほぼ同等な屈折率を有する熱硬化性接着剤を用い、空気
層を無くすことが提案されている(例えば、特開昭51
−5031号公報参照)。また、実験的には、コア4,
4´とほぼ同等な屈折率を有するオイルを空気層に満た
して結合部の損失を低減させる方法も提案されている
(例えば、特開昭55−14230号公報参照)。
As a conventional method for reducing such a coupling loss, a thermosetting adhesive having a refractive index almost equal to that of the cores 4 and 4'of the synthetic resin optical transmitters 1 and 1'is used to form an air layer. It has been proposed to eliminate them (for example, JP-A-51).
-5031). Also, experimentally, the core 4,
A method has also been proposed in which the air layer is filled with oil having a refractive index substantially equal to that of 4'to reduce the loss at the joint (see, for example, JP-A-55-14230).

【0004】[0004]

【発明が解決しようとする課題】ところで、前者の熱硬
化性接着剤を左右の合成樹脂光伝送体1,1´の結合部
に介在させた場合、該合成樹脂光伝送体1,1´同士を
突き合わせた状態で未硬化の接着剤を空気層に満たして
熱硬化させるため、合成樹脂光伝送体1,1´同士が強
固に固定されてしまい、脱着が不可能となってしまう。
また、後者のオイルを空気層に満たす方式の場合には、
オイルの流動により損失の経時変化が生じるため、耐久
性の面で問題があった。
By the way, when the former thermosetting adhesive is interposed between the joint portions of the left and right synthetic resin optical transmission bodies 1, 1 ′, the synthetic resin optical transmission bodies 1, 1 ′ are connected to each other. Since the uncured adhesive is filled in the air layer and heat-cured in a state of being abutted against each other, the synthetic resin optical transmission bodies 1 and 1'are firmly fixed to each other and cannot be detached.
In the case of the latter method of filling the air layer with oil,
There is a problem in terms of durability because loss changes over time due to the flow of oil.

【0005】この発明の目的は、上述した従来の技術の
欠点を解消し、接続する合成樹脂光伝送体同士の結合損
失を低減させ、かつ、合成樹脂光伝送体の脱着を容易に
可能とした新規なマッチング材およびそれを使用した光
伝送体の接続部を提供するにある。
The object of the present invention is to solve the above-mentioned drawbacks of the prior art, to reduce the coupling loss between the synthetic resin optical transmission members to be connected, and to facilitate the attachment / detachment of the synthetic resin optical transmission members. It is to provide a novel matching material and a connection portion of an optical transmission body using the same.

【0006】[0006]

【課題を解決するための手段】この発明は、光を伝送す
るコアと該コアを包むクラッドからなる合成樹脂伝送体
を少なくとも二つ以上結合する箇所にマッチングを目的
とすたゴム状弾性体の一成分がポリブタジエンアクリレ
ートであるゴム状マッチング材を介在させた光伝送体の
接続部である。また、上記ゴム状マッチング材として、
ポリブタジエンアクリレートをイソボロニアルアクリレ
ートに溶解させ、該溶液中のイソボロニアルアクリレー
トを重合させるゴム状マッチング材である。さらに、イ
ソボロニアルアクリレートを紫外線照射により重合させ
形成するゴム状マッチング材である。
DISCLOSURE OF THE INVENTION The present invention provides a rubber-like elastic body for the purpose of matching at least two synthetic resin transmission bodies each consisting of a core for transmitting light and a clad enclosing the core. It is a connection portion of an optical transmission body in which a rubber-like matching material whose one component is polybutadiene acrylate is interposed. Also, as the rubber-like matching material,
It is a rubber-like matching material in which polybutadiene acrylate is dissolved in isoboronal acrylate and the isoboronial acrylate in the solution is polymerized. Further, it is a rubber-like matching material formed by polymerizing isoboronal acrylate by irradiation with ultraviolet rays.

【0007】[0007]

【作用】接続する合成樹脂光伝送体同士の結合部間に、
該合成樹脂光伝送体のコアとほぼ同等な屈折率を有する
アクリル系ゴム状マッチング材を介在させることによ
り、空気層の存在による結合部の損失を大幅に低減させ
ることができる。また、合成樹脂光伝送体の脱着が容易
に可能となり、マッチング材の流動等による結合損失の
経時変化を抑制させることができる。
[Operation] Between the joints between the synthetic resin optical transmission members to be connected,
By interposing an acrylic rubber-like matching material having a refractive index almost equal to that of the core of the synthetic resin light transmission body, it is possible to greatly reduce the loss of the coupling portion due to the presence of the air layer. Further, the synthetic resin optical transmission body can be easily attached and detached, and the change with time of the coupling loss due to the flow of the matching material can be suppressed.

【0008】[0008]

【実施例】この発明の合成樹脂光伝送体の接続部に使用
されるゴム状マッチング材としては、少なくとも一成分
がポリブタジエンアクリレートであることを特徴として
おり、その他の成分としてはポリイソボロニルアクリレ
ートが考えられるが、特にこれらに限定されるものでは
ない。ただし、ポリブタジエンアクリレート(屈折率:
約1.50)と他の成分の屈折率差が透明性の関係上
0.1以下であることが望ましい。
EXAMPLE At least one component of the rubber-like matching material used for the connecting portion of the synthetic resin optical transmission body of the present invention is characterized by being polybutadiene acrylate, and the other component is polyisoboronyl acrylate. It is possible, but not limited to these. However, polybutadiene acrylate (refractive index:
It is desirable that the difference in refractive index between the other components (about 1.50) and other components is 0.1 or less in view of transparency.

【0009】また、上記ゴム状マッチング材の製造方法
(硬化法)としては、主として紫外線照射による重合法
が考えられるが、これは熱硬化法でも良く、これも特に
これらに限定されるものではない。ここで、紫外線照射
による製造方法を図面を参照して説明する。図2に示す
ようにポリブタジエンアクリレート6とポリイソボロニ
ルアクリレート7の二成分からなるゴム状マッチング材
をビーカ8内に入れる。そして、まずモノマー状態であ
るイソボロニルアクリレート7中にポリブタジエンアク
リレート6を温度70℃,30分の条件で撹拌棒9で撹
拌しながらよく溶解させる。続いて、この溶液を60℃
の温度に加熱した状態で真空乾燥機により1時間脱泡を
行う。次に、この脱泡した溶液を図3(a)に示すよう
にガラス板12上に滴下し、これをドクターブレード1
1を用いて矢印方向に平らにならして所定の厚さに塗布
し、図3(b)に示すように上から矢印で示す紫外線1
3を所定量照射することにより、粘調のある溶液を硬化
させてゴム状マッチング材が製造される。
As a method (curing method) for manufacturing the rubber-like matching material, a polymerization method by mainly irradiating with ultraviolet rays can be considered, but this may be a thermosetting method, which is not particularly limited thereto. . Here, a manufacturing method by ultraviolet irradiation will be described with reference to the drawings. As shown in FIG. 2, a rubber-like matching material composed of two components, polybutadiene acrylate 6 and polyisobornyl acrylate 7, is placed in a beaker 8. Then, first, polybutadiene acrylate 6 is well dissolved in isoboronyl acrylate 7 in a monomer state while stirring with stirring rod 9 at a temperature of 70 ° C. for 30 minutes. Subsequently, the solution is heated to 60 ° C.
Degassing is carried out for 1 hour by a vacuum dryer while being heated to the temperature. Next, the defoamed solution is dropped on the glass plate 12 as shown in FIG.
1 to be flattened in the direction of the arrow and applied to a predetermined thickness, and as shown in FIG.
By irradiating 3 with a predetermined amount, the viscous solution is cured to produce a rubber-like matching material.

【0010】以下、図面に基づいてこの発明の具体的な
実施例を説明する。 実施例 図1は実施例の光伝送体の接続部の構成を示す横断面図
である。即ち、左右の接続する合成樹脂光伝送体1,1
´の端部にはそれぞれ先端に凸型コネクタとなるプラグ
2,2´を取り付け中継コネクタ3を介して接続される
が、ゴム状マッチング材14としては前述したアクリレ
ートとイソボロニアルアクリレートからなる接着剤を用
いた。
Specific embodiments of the present invention will be described below with reference to the drawings. Example FIG. 1 is a cross-sectional view showing a configuration of a connection portion of an optical transmission body of an example. That is, the left and right connected synthetic resin optical transmitters 1, 1
Plugs 2 and 2'which are convex connectors are attached to the respective ends of the ′ and are connected via the relay connector 3, and the rubber-like matching material 14 is made of the above-mentioned acrylate and isoboronial acrylate. The agent was used.

【0011】製造方法は前述したとおりであるが、この
製造過程で用いたポリブタジエンアクリレートの分子量
は1000であり、イソボロニルアクレートとの混合比
を重量比で1:1とし、光硬化剤として2,2−ジメト
キシ−2−フェニルアセトフェノンを3重量%添加した
混合溶液を図3(a)に示すような方法で15ミルの厚
みにガラス板上に塗布し、紫外線を100mJ/cm2
照射してゴム状マッチング材シートを作成した。この得
られたマッチング材の屈折率は約1.5であった。
The manufacturing method is as described above, but the molecular weight of the polybutadiene acrylate used in this manufacturing process is 1000, and the mixing ratio with isoboronylaclate is 1: 1 by weight, and the polybutadiene acrylate is used as a photocuring agent. A mixed solution containing 3% by weight of 2,2-dimethoxy-2-phenylacetophenone was applied on a glass plate to a thickness of 15 mil by the method as shown in FIG. 3 (a), and ultraviolet rays of 100 mJ / cm 2 were applied.
Irradiation was performed to create a rubber-like matching material sheet. The matching material thus obtained had a refractive index of about 1.5.

【0012】次に、合成樹脂光伝送体として、コアがポ
リメチルメタクリレート(屈折率:1.49)、クラッ
ドがポリ4−ふっ化エチレン6−ふっ化プロピレン共重
合体である端面を研磨したプラスチック光ファイバ1,
1´を用いて、図1に示すような先に得られたゴム状マ
ッチング材14をファイバ間に介在する形で結合させ
た。そして、その結合損失を測定したところ約0.6d
Bであり、良好な結果を示した。
Next, as a synthetic resin optical transmission medium, a plastic whose core is polymethylmethacrylate (refractive index: 1.49) and whose cladding is poly4-fluoroethylene-6-propylene fluoride copolymer is polished. Optical fiber 1,
1 ′ was used to bond the previously obtained rubber-like matching material 14 as shown in FIG. And, when the coupling loss was measured, it was about 0.6d.
B was a good result.

【0013】比較例1 上記実施例で使用した端面を研磨したプラスチック光フ
ァイバをマッチング材を使用しないで図4に示すような
形で結合させて接続部とした。その結合損失を測定した
ところ約1.3dBであった。
COMPARATIVE EXAMPLE 1 The plastic optical fibers having the polished end faces used in the above examples were joined in the form as shown in FIG. 4 without using a matching material to form a connecting portion. When the coupling loss was measured, it was about 1.3 dB.

【0014】比較例2 上記実施例で使用した端面を研磨したプラスチック光フ
ァイバをマッチング材14として屈折率が約1.5のオ
イルを付着させ、図1に示すような形に結合して接続部
とした。その結合損失を測定したところ約0.5dBで
あった。しかし、この例の場合、接続部をこの状態に維
持させることは困難であった。
COMPARATIVE EXAMPLE 2 The plastic optical fiber having the polished end surface used in the above example is used as a matching material 14 and oil having a refractive index of about 1.5 is attached to the optical fiber, which is then coupled in a shape as shown in FIG. And When the coupling loss was measured, it was about 0.5 dB. However, in the case of this example, it was difficult to maintain the connection portion in this state.

【0015】[0015]

【発明の効果】以上説明したとおり、この発明の光伝送
体の接続部は、合成樹脂光伝送体同士の結合間に新規な
ゴム状マッチング材を介在させることことにより、結合
間の空気層がマッチング材で満たされるため、フレネル
反射が減少し、かつ、見かけ上結合部端面の平滑度が向
上して光の散乱が抑制され、さらに、液状ではないため
にマッチング材の流動による結合損失の経時変化が抑え
られる効果がある。また、接続部の合成樹脂光伝送体を
容易に着脱することが可能である。
As described above, in the connecting portion of the optical transmission body of the present invention, a new rubber-like matching material is interposed between the couplings of the synthetic resin optical transmission bodies so that an air layer between the couplings is formed. Since it is filled with the matching material, Fresnel reflection is reduced, and the smoothness of the joint end face is apparently improved to suppress the scattering of light.Furthermore, since it is not a liquid, the coupling loss due to the flow of the matching material over time It has the effect of suppressing changes. Further, the synthetic resin optical transmission body of the connecting portion can be easily attached and detached.

【図面の簡単な説明】[Brief description of drawings]

【図1】この発明の実施例の光伝送体接続部の構成を示
す断面図、
FIG. 1 is a cross-sectional view showing a configuration of an optical transmission body connecting portion of an embodiment of the present invention,

【図2】光伝送体接続部に使用するマッチング材の製造
工程の一部分を示す側面図、
FIG. 2 is a side view showing a part of the manufacturing process of the matching material used for the optical transmission body connecting portion,

【図3】(a),(b)は、マッチング材の次の製造工
程を示す側面図、
3 (a) and 3 (b) are side views showing the next manufacturing process of the matching material,

【図4】従来の光伝送体接続部の構成を示す断面図であ
る。
FIG. 4 is a cross-sectional view showing a configuration of a conventional optical transmission body connecting portion.

【符号の説明】[Explanation of symbols]

1,1´ 合成樹脂光伝送体 2,2´ プラグ 3 中継コネクタ 4,4´ コア 5 合成樹脂光伝送体結合面 6 ポリブタジエンアクリレート 7 イソボロニルアクリレート 8 ビーカ 9 撹拌棒 10 溶液 11 ドクターブレード 12 ガラス板 13 紫外線 14 ゴム状マッチング材 1,1 'Synthetic resin light transmitter 2,2' Plug 3 Relay connector 4,4 'Core 5 Synthetic resin light transmitter coupling surface 6 Polybutadiene acrylate 7 Isoboronyl acrylate 8 Beaker 9 Stir bar 10 Solution 11 Doctor blade 12 Glass Plate 13 UV 14 Rubber-like matching material

───────────────────────────────────────────────────── フロントページの続き (72)発明者 浅野 秀樹 茨城県日立市日高町5丁目1番1号「日立 電線株式会社パワーシステム研究所内」 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hideki Asano Inventor Hideki Asano 5-1-1 Hidaka-cho, Hitachi City, Ibaraki “Inside the Hitachi Cable Electric Power Systems Laboratory”

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 光を伝送するコアと該コアを包むクラッ
ドからなる合成樹脂伝送体を少なくとも二つ以上結合す
る箇所にマッチングを目的としたゴム状弾性体の一成分
がポリブタジエンアクリレートであることを特徴とする
ゴム状マッチング材を使用した光伝送体の接続部。
1. A component of a rubber-like elastic body for the purpose of matching at least two or more synthetic resin transmission bodies consisting of a core for transmitting light and a clad enclosing the core is polybutadiene acrylate. A connection part of an optical transmission body using a characteristic rubber-like matching material.
【請求項2】 上記光伝送体の接続部に使用するゴム状
マッチング材において、ポリブタジエンアクリレートを
イソボロニアルアクリレートに溶解させ、該溶液中のイ
ソボロニアルアクリレートを重合させることにより形成
することを特徴とするゴム状マッチング材。
2. The rubber-like matching material used in the connection part of the light transmission body, which is formed by dissolving polybutadiene acrylate in isoboronal acrylate and polymerizing the isoboronial acrylate in the solution. A rubber-like matching material.
【請求項3】 請求項2記載のゴム状マッチング材にお
いて、イソボロニアルアクリレートを紫外線照射により
重合させ形成することを特徴とするゴム状マッチング
材。
3. The rubber-like matching material according to claim 2, which is formed by polymerizing isoboronal acrylate by irradiation of ultraviolet rays.
JP6030798A 1994-02-03 1994-02-03 Juncture of light transmission body and matching material for juncture Pending JPH07218744A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6030798A JPH07218744A (en) 1994-02-03 1994-02-03 Juncture of light transmission body and matching material for juncture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6030798A JPH07218744A (en) 1994-02-03 1994-02-03 Juncture of light transmission body and matching material for juncture

Publications (1)

Publication Number Publication Date
JPH07218744A true JPH07218744A (en) 1995-08-18

Family

ID=12313707

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6030798A Pending JPH07218744A (en) 1994-02-03 1994-02-03 Juncture of light transmission body and matching material for juncture

Country Status (1)

Country Link
JP (1) JPH07218744A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113845622A (en) * 2021-10-13 2021-12-28 常州邦瑞新材料科技有限公司 High-refractive-index and high-brightness prism resin for laminating film and preparation method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113845622A (en) * 2021-10-13 2021-12-28 常州邦瑞新材料科技有限公司 High-refractive-index and high-brightness prism resin for laminating film and preparation method thereof
CN113845622B (en) * 2021-10-13 2023-03-24 常州邦瑞新材料科技有限公司 High-refractive-index and high-brightness prism resin for laminating film and preparation method thereof

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