JP2003255184A - Lens-incorporated optical connector - Google Patents
Lens-incorporated optical connectorInfo
- Publication number
- JP2003255184A JP2003255184A JP2002051965A JP2002051965A JP2003255184A JP 2003255184 A JP2003255184 A JP 2003255184A JP 2002051965 A JP2002051965 A JP 2002051965A JP 2002051965 A JP2002051965 A JP 2002051965A JP 2003255184 A JP2003255184 A JP 2003255184A
- Authority
- JP
- Japan
- Prior art keywords
- optical
- light guide
- lens
- optical fiber
- guide member
- 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
Landscapes
- Mechanical Coupling Of Light Guides (AREA)
- Optical Couplings Of Light Guides (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、光ファイバ同士、
あるいは光ファイバと受発光ユニットとの間の光学的接
続を行う導光部材を備えたレンズ入り光コネクタに関す
る。TECHNICAL FIELD The present invention relates to optical fibers,
Alternatively, the present invention relates to an optical connector with a lens provided with a light guide member for making an optical connection between an optical fiber and a light emitting / receiving unit.
【0002】[0002]
【従来の技術】近年、自動車などの車両分野においても
光通信システムが普及し、通信容量の増大に伴ってコア
径が小さく伝送帯域の大きい光ファイバが採用されつつ
ある。そのような光ファイバ同士を光学的に接続する場
合、コア径が小さいとそれら光ファイバ間の光接続効率
が損なわれる問題がある。なお、ここでいう光ファイバ
とはコアとクラッドだけからなるものを指し、以下同様
とする。2. Description of the Related Art In recent years, optical communication systems have become widespread in the field of vehicles such as automobiles, and optical fibers having a small core diameter and a large transmission band have been adopted as the communication capacity increases. When optically connecting such optical fibers, there is a problem that the optical connection efficiency between the optical fibers is impaired if the core diameter is small. The optical fiber referred to here is a fiber consisting of only a core and a clad, and the same applies hereinafter.
【0003】従来、そのような光接続損失を抑えるため
に、光ファイバ間に光学的接続をなし得る部材を介在さ
せる多くの構造が提案されている。例えば、特開昭61-1
85706号公報に開示された接続技術は、光ファイバ端面
にこのファイバ径とほぼ同一直径をもつ球状レンズを密
接させている。また、先に本願出願人によって提案され
た特開2000-111765号公報の光コネクタ用レンズ型スリ
ーブの場合、光ファイバと受発光ユニットとの間に、俵
形状の一端側にコリメートレンズ機能部を設けかつ他端
側に集光レンズ機能部を設けたスリーブと呼ぶ導光レン
ズを介在させている。Conventionally, in order to suppress such optical connection loss, many structures in which a member capable of making an optical connection is interposed between optical fibers have been proposed. For example, Japanese Patent Laid-Open No. 61-1
In the connection technology disclosed in Japanese Patent Publication No. 85706, a spherical lens having a diameter substantially equal to the fiber diameter is brought into close contact with the end face of the optical fiber. Further, in the case of a lens type sleeve for an optical connector of JP 2000-111765 A previously proposed by the applicant of the present application, a collimating lens function part is provided between the optical fiber and the light emitting / receiving unit on one end side of the bale shape. A light guiding lens called a sleeve provided and having a condenser lens function portion on the other end side is interposed.
【0004】また、一般に通信用ガラスファイバ同士を
光コネクタを用いて接続する場合、光接続損失を抑える
ために、光ファイバ端面を非球面形状などに加工して接
触させている。In general, when glass fibers for communication are connected to each other by using an optical connector, the end faces of the optical fibers are processed into an aspherical shape or the like in order to suppress optical connection loss.
【0005】[0005]
【発明が解決しようとする課題】光接続損失を抑えると
いう意味では光ファイバ端面同士を接触させることが望
ましい。ところが、ファイバ端面同士の接触方式を自動
車の光通信システムに適用した場合、車体の走行振動や
衝撃によって光ファイバ端面に傷が付き易い。そのた
め、ファイバ端面同士を直に接触させる技術は自動車の
光通信システムとして問題がある。本願出願人による上
記特開2000-111765号公報の光コネクタ用レンズ型スリ
ーブの場合、光ファイバ端面同士を接触させ、かつ自動
車など車両への採用が可能になるといったように両立で
きれば好ましい。しかしながら、この場合光ファイバ端
面間に間隔を確保して配置する必要があり、端面反射が
生じるために光接続損失を抑える点に関してなお改良の
余地を残している。また、上記特開昭61-185706号公報
に開示された接続技術の場合、光ファイバ端面に球状レ
ンズを接触させていることで、振動や衝撃によって双方
の部材が損傷し易いといった基本的な問題を解決してい
ない。さらにこの場合、光ファイバと球状レンズがほぼ
同一直径であることから、ファイバ端面から球状レンズ
の屈折面までの距離が短く、出射光のビーム径を大きく
できないといった問題点がある。In the sense of suppressing the optical connection loss, it is desirable to bring the end faces of the optical fibers into contact with each other. However, when the method of contacting the end faces of the fibers is applied to the optical communication system of the automobile, the end faces of the optical fibers are easily scratched by the traveling vibration and impact of the vehicle body. Therefore, the technique of directly contacting the end faces of the fibers is problematic as an optical communication system for automobiles. In the case of the lens-type sleeve for an optical connector of the above-mentioned Japanese Patent Application Laid-Open No. 2000-111765 by the applicant of the present application, it is preferable that both end faces of the optical fibers can be brought into contact with each other and can be adopted in a vehicle such as an automobile. However, in this case, it is necessary to secure a space between the end faces of the optical fiber, and since end face reflection occurs, there is still room for improvement in terms of suppressing optical connection loss. Further, in the case of the connection technique disclosed in the above-mentioned Japanese Patent Laid-Open No. 61-185706, the basic problem that both members are easily damaged by vibration or impact by contacting the spherical lens with the end face of the optical fiber. Has not solved. Further, in this case, since the optical fiber and the spherical lens have almost the same diameter, there is a problem that the distance from the end face of the fiber to the refracting surface of the spherical lens is short and the beam diameter of the emitted light cannot be increased.
【0006】したがって、本発明の目的は、光ファイバ
同士間、または受発光ユニットとの間にレンズ付き導光
部材を介在させて光学的接続を行うに際して、その導光
部材を光ファイバ端面に密接させることで光接続損失を
抑えるようにしたレンズ入り光コネクタを提供すること
にある。Therefore, an object of the present invention is to bring a light guide member into close contact with the end face of the optical fiber when optical connection is made by interposing a light guide member with a lens between the optical fibers or between the light emitting and receiving unit. An object of the present invention is to provide an optical connector with a lens that suppresses optical connection loss by doing so.
【0007】[0007]
【課題を解決するための手段】上記課題を解決するため
に、本発明にかかる請求項1に記載のレンズ入り光コネ
クタは、光コネクタハウジングを構成する筒状の光ファ
イバ接続スリーブ5と、この光ファイバ接続スリーブ5
の内部中央部に嵌合される光透過性の本体11を有し、
この本体11の内部に導光レンズ12を内蔵した導光部
材10とを備えてなっていることを特徴とする。In order to solve the above problems, an optical connector with a lens according to a first aspect of the present invention is provided with a cylindrical optical fiber connecting sleeve 5 which constitutes an optical connector housing, and Optical fiber connection sleeve 5
Has a light-transmissive main body 11 fitted in the inner central part of
The main body 11 is provided with a light guide member 10 having a light guide lens 12 built therein.
【0008】以上から、この請求項1に記載のレンズ入
り光コネクタは、例えば図1以下の各図に示すように、
筒状の光ファイバ接続スリーブ5の内部に嵌合させて導
光部材10をセットし、例えば光ファイバ1,2の先端
部に固定したフェルール3,4をその光ファイバ接続ス
リーブ5の両端から挿入すると、光ファイバ1,2間の
間隙によって生じる光接続損失を導光部材10で抑える
ことができる。From the above, the optical connector with a lens according to the first aspect of the present invention is, for example, as shown in each of the drawings below FIG.
The light guide member 10 is set by fitting inside the tubular optical fiber connection sleeve 5, and ferrules 3 and 4 fixed to the tip ends of the optical fibers 1 and 2 are inserted from both ends of the optical fiber connection sleeve 5, for example. Then, the light guide member 10 can suppress the optical connection loss caused by the gap between the optical fibers 1 and 2.
【0009】また、請求項2に記載のレンズ入り光コネ
クタは、送受信用の一方と他方の光ファイバ1,2の各
先端部に固定されたフェルール3,4を前記光ファイバ
接続スリーブ5の内周に対向させて嵌合させ、光ファイ
バ1,2およびフェルール3,4のそれぞれ端面を前記
導光部材10の本体11の両端面11a,11bに密接
させてなっていることを特徴とする。In the optical connector with a lens according to a second aspect of the present invention, the ferrules 3 and 4 fixed to the respective tip portions of the transmitting and receiving optical fibers 1 and 2 are provided in the optical fiber connecting sleeve 5. It is characterized in that the optical fibers 1 and 2 and the ferrules 3 and 4 are fitted so as to face each other around the circumference, and the respective end faces of the optical fibers 1 and 2 and the ferrules 3 and 4 are brought into close contact with both end faces 11a and 11b of the main body 11 of the light guide member 10.
【0010】以上から、この請求項2に記載のレンズ入
り光コネクタは、例えば図1に示すように、光ファイバ
1,2およびフェルール3,4のそれぞれ端面が前記導
光部材10の本体11の両端面11a,11bに密接し
ているので、端面反射などを生じることなく、光接続損
失を抑える。From the above, in the optical connector with a lens according to the present invention, for example, as shown in FIG. 1, the end faces of the optical fibers 1 and 2 and the ferrules 3 and 4 of the main body 11 of the light guide member 10 are formed. Since it is in close contact with both end surfaces 11a and 11b, optical connection loss is suppressed without causing end surface reflection or the like.
【0011】また、請求項3に記載のレンズ入り光コネ
クタは、前記フェルールの各先端部に前記導光部材が嵌
合方式またはねじ螺合方式で結合して一体化されてなっ
ていることを特徴とする。Further, in the optical connector with a lens according to a third aspect of the present invention, the light guide member is integrally connected to each end of the ferrule by a fitting method or a screw screwing method. Characterize.
【0012】以上から、この請求項3に記載のレンズ入
り光コネクタは、例えば図4および図5に示すように、
フェルール3,4の先端部に設けた嵌合凸部3a,4a
を導光部材30に設けた嵌合凹部31aに凹凸嵌合させ
ることで、光ファイバ端面1a,2aとフェルール端面
を導光部材30に強固に密接させることができる。From the above, the optical connector with a lens according to the third aspect of the present invention is, for example, as shown in FIGS.
Fitting protrusions 3a and 4a provided at the tip of the ferrules 3 and 4
The concave and convex portions are fitted into the fitting concave portion 31a provided in the light guide member 30, so that the optical fiber end faces 1a and 2a and the ferrule end face can be firmly brought into close contact with the light guide member 30.
【0013】また、請求項4に記載のレンズ入り光コネ
クタは、前記導光部材10の本体11が車体振動および
衝撃に対して所要の硬度を有する柔軟性と、耐摩耗性
と、耐衝撃性を備え、前記導光レンズ12が所要の光透
過性および屈折率を備えてなっていることを特徴とす
る。Further, in the optical connector with a lens according to a fourth aspect of the present invention, the body 11 of the light guide member 10 has flexibility required to withstand vibration and shock of the vehicle body, wear resistance, and shock resistance. And the light guide lens 12 is provided with the required light transmittance and refractive index.
【0014】以上から、この請求項4に記載のレンズ入
り光コネクタは、前記導光部材10の本体11の材質に
はポリウレタン系やポリエステル系のエラストマが好適
である。例えば、ポリウレタン系エラストマを用いた本
体11の場合、柔軟性はJIS硬度72A、耐摩耗性が
NBRの20倍である。ポリエステル系エラストマを用
いた本体11の場合、柔軟性はJIS硬度71A、耐摩
耗性がNBRの8倍である。また、図2に示すように、
光の透過率に関しては、ポリウレタン系エラストマはか
なり高く、伝送損失が波長850nmで0.08dB/
mmと見込まれる。同じく、ポリウレタン系エラストマ
の場合、光の屈折率が常温で1.54であり、約1.5
の屈折率を有するコアをもつ光ファイバとの界面での反
射を、空気層との界面での反射と比較して極端に小さく
することができる。これらの材料を用いた本体11は金
型によるインジェクション(射出)成形が可能である。From the above, in the optical connector with a lens according to the present invention, polyurethane or polyester elastomer is suitable for the material of the main body 11 of the light guide member 10. For example, in the case of the main body 11 using a polyurethane elastomer, the flexibility is JIS hardness 72A and the abrasion resistance is 20 times that of NBR. In the case of the main body 11 using the polyester elastomer, the flexibility is JIS hardness 71A and the abrasion resistance is 8 times that of NBR. Also, as shown in FIG.
Regarding the transmittance of light, polyurethane elastomers are considerably high, and the transmission loss is 0.08 dB / at a wavelength of 850 nm.
Expected to be mm. Similarly, in the case of polyurethane elastomer, the refractive index of light is 1.54 at room temperature, which is about 1.5.
The reflection at the interface with the optical fiber having the core having the refractive index of 1 can be made extremely small as compared with the reflection at the interface with the air layer. The main body 11 using these materials can be injection-molded by a mold.
【0015】[0015]
【発明の実施の形態】以下、本発明にかかるレンズ入り
光コネクタの実施の形態について、図面を参照して詳細
に説明する。図1は、送受信用の一方と他方の光ファイ
バ1,2同士を要旨部材である導光部材10を介して光
学的に接続する第1実施の形態のレンズ入り光コネクタ
を示す組立断面図である。光コネクタハウジングは筒形
に成形された合成樹脂製の光ファイバ接続スリーブ5を
備え、光ファイバ1,2の各先端部にフェルール3,4
を固定し、これらフェルール3,4をその光ファイバ接
続スリーブ5の両端から嵌合させて向かい合わせに接続
するようになっている。光ファイバ接続スリーブ5とし
ては、フェルール3,4を両端から対向させて嵌合した
際、光ファイバ1,2の光軸が同軸上に自動的に揃う調
芯機能を備えた内周精度で成形されている。また、フェ
ルール3,4の端面は研磨処理され、光ファイバ1,2
の各端面1a,2aと面一にしている。そうしたファイ
バ端面1a,2aに上記導光部材10の本体端面11
a,11bを密接させて光ファイバ1,2間に介在させ
ている。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of an optical connector with a lens according to the present invention will be described below in detail with reference to the drawings. FIG. 1 is an assembly cross-sectional view showing a lens-equipped optical connector of a first embodiment in which one of the transmitting and receiving optical fibers 1 and 2 is optically connected to each other via a light guide member 10 which is a gist member. is there. The optical connector housing is provided with an optical fiber connecting sleeve 5 made of a synthetic resin and formed in a tubular shape, and the ferrules 3, 4 are attached to the respective tip portions of the optical fibers 1, 2.
Is fixed, and the ferrules 3 and 4 are fitted from both ends of the optical fiber connecting sleeve 5 to be connected face to face. As the optical fiber connecting sleeve 5, when the ferrules 3 and 4 are fitted to face each other from both ends, the optical fibers 1 and 2 are molded with an inner peripheral accuracy having an aligning function that automatically aligns the optical axes coaxially. Has been done. The end faces of the ferrules 3 and 4 are polished so that the optical fibers 1 and 2 are
Are flush with the respective end faces 1a, 2a. The body end surface 11 of the light guide member 10 is attached to the fiber end surfaces 1a and 2a.
a and 11b are closely contacted and are interposed between the optical fibers 1 and 2.
【0016】円柱形に成形された導光部材10の本体1
1の材質には、高い柔軟性を有し、耐摩耗性、耐衝撃
性、そして光透過率に優れて、車載環境に耐えうる材料
が用いられている。そうした材料には、例えばポリウレ
タン系エラストマ(柔軟性:JIS硬度72A、耐摩耗
性:NBRの20倍)、ポリエステル系エラストマ(柔
軟性:JIS硬度71A、耐摩耗性:NBRの8倍)な
どがある。また、図2に示すように、光の透過率に関し
ては、ポリウレタン系エラストマはかなり高く、伝送損
失が波長850nmで0.08dB/mmと見込まれ
る。同じく、ポリウレタン系エラストマの場合、光の屈
折率が常温で1.54であり、約1.5の屈折率を有す
るコアをもつ光ファイバとの界面での反射を、空気層と
の界面での反射と比較して極端に小さくすることができ
る。これらの材料を用いた本体11は成形が可能であ
る。Main body 1 of light guide member 10 formed in a cylindrical shape
As the material of No. 1, a material having high flexibility, excellent wear resistance, impact resistance, and light transmittance and capable of withstanding an in-vehicle environment is used. Such materials include, for example, polyurethane elastomers (flexibility: JIS hardness 72A, wear resistance: 20 times NBR), polyester elastomers (flexibility: JIS hardness 71A, wear resistance: 8 times NBR), etc. . Further, as shown in FIG. 2, the polyurethane elastomer has a considerably high light transmittance, and the transmission loss is expected to be 0.08 dB / mm at a wavelength of 850 nm. Similarly, in the case of polyurethane elastomer, the refractive index of light is 1.54 at room temperature, and the reflection at the interface with the optical fiber having the core having the refractive index of about 1.5 is reflected at the interface with the air layer. It can be extremely small compared to reflection. The main body 11 using these materials can be molded.
【0017】このような特性を備えた導光部材10の円
柱形本体11の内部に本例では球体の導光レンズ12を
内蔵して一体成形されている。導光レンズ12の材質
は、光の屈折率が本体11の屈折率よりも大きく、例え
ば1.7以上のものが使用される。In this example, a spherical light guiding lens 12 is built in and integrally molded inside the cylindrical main body 11 of the light guiding member 10 having such characteristics. The material of the light guide lens 12 has a refractive index of light larger than that of the main body 11 and is, for example, 1.7 or more.
【0018】以上から、この第1実施の形態では次のよ
うに作用して効果を奏する。
従来、自動車など車両用光通信システムでは、光ファ
イバの接続部を車体振動や衝撃による傷付きなどから保
護するために、光ファイバ端面を接触させずに隙間を開
けることが原因で光ファイバ端面に反射が生じるなど、
光接続効率が損なわれるという不具合があった。したが
って、第1実施の形態の場合、光ファイバ端面1a,2
aを導光部材10の両側から本体端面11a,11bに
密接させて、光ファイバ端面1a,2a間に隙間が生じ
ないようにし、導光レンズ12で光の結合効率を高める
ことによって光接続損失を抑えることができる。
導光部材10の本体11の材質に高い柔軟性をもつポ
リウレタン系エラストマやポリエステル系エラストマな
どが用いられている。そうした弾性による柔軟性で本体
11の両端面11a,11bに押し当てられるフェルー
ル3,4の端面との弾密着性が高められる。そのような
密着性のため本体11とフェルール3,4との接触面間
にエアが溜まることはなく、光ファイバ1,2(のコ
ア)と導光レンズ12の屈折率に違いによる反射損失を
低減でき、エアの介在で光接続効率が損なわれるといっ
た問題も解消できる。
導光部材10の本体11が高い柔軟性など車載環境に
適した材料で成形されているので、車体振動による振動
や衝撃を吸収し、光ファイバ端面1a,2aの保護が図
られると同時に、本体11と光ファイバ端面1a,2a
やフェルール端面との摩擦による摩耗、また本体11自
身の光ファイバ接続スリーブ5の内周面との摩擦による
摩耗、摩耗で生じる摩耗屑などを軽減できる。
導光部材10の本体11の高い柔軟性によって、温度
変化のために光ファイバ1,2の端面1a,2aがフェ
ルール3,4の端面から突き出してしまう突出量いわゆ
るピストニング分を吸収することができる。From the above, in the first embodiment, the following actions and effects are obtained. Conventionally, in optical communication systems for vehicles such as automobiles, in order to protect the connection part of the optical fiber from damage such as vehicle body vibration and impact, it is necessary to open the gap without contacting the end faces of the optical fiber Such as reflections,
There was a problem that the optical connection efficiency was impaired. Therefore, in the case of the first embodiment, the optical fiber end faces 1a, 2
The optical connection loss is achieved by bringing a into close contact with the body end faces 11a and 11b from both sides of the light guide member 10 so that no gap is created between the optical fiber end faces 1a and 2a, and increasing the light coupling efficiency with the light guide lens 12. Can be suppressed. As the material of the main body 11 of the light guide member 10, a polyurethane-based elastomer or a polyester-based elastomer having high flexibility is used. The elasticity due to such elasticity enhances the elastic adhesion with the end faces of the ferrules 3 and 4 pressed against the end faces 11a and 11b of the main body 11. Due to such adhesion, air is not accumulated between the contact surfaces of the main body 11 and the ferrules 3 and 4, and the reflection loss due to the difference in the refractive index between the optical fibers 1 and 2 (the core thereof) and the light guide lens 12 is caused. It can be reduced and the problem that the optical connection efficiency is impaired by the presence of air can be solved. Since the main body 11 of the light guide member 10 is formed of a material suitable for an in-vehicle environment such as high flexibility, it absorbs vibrations and shocks caused by vehicle body vibrations, protects the optical fiber end faces 1a and 2a, and at the same time, 11 and optical fiber end faces 1a and 2a
It is possible to reduce abrasion due to friction with the end face of the ferrule, abrasion due to friction with the inner peripheral surface of the optical fiber connecting sleeve 5 of the main body 11 itself, abrasion debris generated by abrasion, and the like. Due to the high flexibility of the main body 11 of the light guide member 10, it is possible to absorb the amount of so-called pistening that the end faces 1a, 2a of the optical fibers 1, 2a protrude from the end faces of the ferrules 3, 4 due to temperature changes. .
【0019】また、図3は、第1実施の形態の図1で示
された導光部材10に代えて、この場合導光部材20の
本体21に2つの球体の導光レンズ22,23を内蔵し
た第2実施の形態を示す組立断面図である。このように
複数個の導光レンズ22,23を内蔵させることで、第
1実施の形態と比較すれば、光結合効率をより一層高め
るのに有効である。Further, in FIG. 3, instead of the light guide member 10 shown in FIG. 1 of the first embodiment, two spherical light guide lenses 22 and 23 are provided in the main body 21 of the light guide member 20 in this case. It is an assembly sectional view showing a built-in 2nd embodiment. By incorporating a plurality of light guide lenses 22 and 23 in this way, it is effective to further increase the optical coupling efficiency as compared with the first embodiment.
【0020】次に、図4および図5は、光ファイバ1,
2のフェルール3,4の各先端部に導光部材30を結合
して一体化し、それら導光部材30を間隙6を介して対
向させた第3実施の形態を示す組立断面図と分解斜視図
である。すなわち、フェルール3,4の各先端部に径を
一回り小さくして段差加工した嵌合凸部3a,4aを設
け、それに対応して導光部材30の円柱状本体31の端
部に円形の嵌合凹部31aを設け、嵌合凸部3a,4a
と嵌合凹部31aを互いに嵌合させて一体化している。
導光部材30の本体31には球状の導光レンズ32が内
蔵されている。この場合、対向する2つの導光部材30
の本体31間に適当な間隙6を設けることができる。そ
のようにして光ファイバ端面1a,2aから導光レンズ
32までの距離を設計上自由に変更することで、フェル
ール3,4のいずれか一方側から出射した光の平行化後
のビーム径を容易に変更できる利点がある。Next, FIGS. 4 and 5 show the optical fiber 1,
2 is an assembled sectional view and an exploded perspective view showing a third embodiment in which a light guide member 30 is joined to and integrated with each tip of the ferrules 3 and 4 of FIG. 2 and the light guide members 30 are opposed to each other with a gap 6 therebetween. Is. That is, the fitting protrusions 3a and 4a which are stepped with the diameter reduced by one size are provided at the respective tip ends of the ferrules 3 and 4, and a circular shape is provided at the end of the cylindrical body 31 of the light guide member 30 correspondingly. Providing the fitting concave portion 31a, the fitting convex portions 3a, 4a
And the fitting recess 31a are fitted and integrated with each other.
A spherical light guiding lens 32 is built in the body 31 of the light guiding member 30. In this case, the two light guide members 30 facing each other
A suitable gap 6 can be provided between the bodies 31 of the. In this way, by freely changing the distance from the optical fiber end faces 1a and 2a to the light guide lens 32 in terms of design, the beam diameter after collimation of the light emitted from either side of the ferrules 3 and 4 can be easily achieved. There is an advantage that can be changed to.
【0021】この第3実施の形態では、図1および図3
の第1,第2実施の形態の場合と比較すると、垂直ずれ
(軸ずれ)による光接続損失を抑えるのにより有効であ
る。すなわち、図1および図3においては、導光部材1
0,20を光ファイバ端面1a,2a間に挿入しただけ
であるので、光ファイバ接続スリーブ5の内径寸法とフ
ェルール3,4の外径寸法との間の精度誤差や公差のた
めに垂直ずれが生じた場合、光接続損失を抑えるのに大
きな期待はできない。In this third embodiment, FIG. 1 and FIG.
Compared with the cases of the first and second embodiments, it is more effective to suppress the optical connection loss due to vertical deviation (axis deviation). That is, in FIG. 1 and FIG. 3, the light guide member 1
Since 0 and 20 are only inserted between the optical fiber end faces 1a and 2a, there is a vertical deviation due to a precision error or tolerance between the inner diameter dimension of the optical fiber connection sleeve 5 and the outer diameter dimensions of the ferrules 3 and 4. If it does occur, great expectations cannot be placed on suppressing optical connection loss.
【0022】それに対して、図4の第3実施の形態で
は、フェルール3,4のそれぞれ端部に導光部材30が
一体的に結合された構造であるから、光ファイバ接続ス
リーブ5の内径寸法との間で精度誤差や公差で垂直ずれ
が生じている場合でも、光ファイバ1,2のいずれか一
方側から出射した平行光がその垂直ずれ分だけずれるこ
とになるので、それだけ光接続損失を低減できる。その
場合、平行光の部分のビーム径を変更して自由に太くで
きるようにすれば、それだけ垂直ずれを吸収し易くな
り、光接続損失を最小限に抑えるのに有効となる。On the other hand, in the third embodiment shown in FIG. 4, since the light guide member 30 is integrally coupled to each end of the ferrules 3 and 4, the inner diameter of the optical fiber connecting sleeve 5 is determined. Even if there is a vertical deviation due to an accuracy error or tolerance between and, the parallel light emitted from either one of the optical fibers 1 and 2 will be displaced by the vertical deviation. It can be reduced. In that case, if the beam diameter of the parallel light portion is changed so that the beam diameter can be freely increased, the vertical shift can be absorbed more easily, and it is effective in minimizing the optical connection loss.
【0023】また、この場合、導光部材30間に設けた
間隙6のために空気層が介在して反射損失が懸念され
る。しかし、双方の導光部材30の本体31間に間隙6
を設定することについては設計上の自由度があるから、
そうした反射損失という懸念を払拭するためには間隙6
を無くすこともできる。Further, in this case, an air layer is present due to the gap 6 provided between the light guide members 30, and there is a fear of reflection loss. However, a gap 6 is formed between the main bodies 31 of both light guide members 30.
Since there is a degree of freedom in designing,
To eliminate the concern of such reflection loss, the gap 6
Can be eliminated.
【0024】次に、図6および図7は、上記図4の第3
実施の形態の変形例ともいうべき第4実施の形態を示す
組立断面図と分解斜視図である。この場合、フェルール
3,4の各端部において、中心軸の同心円上に環状凸部
3b,4bを設け、それら凸部の周りに環状の嵌合スリ
ット3c,4cを設けている。それに対応して2つの導
光部材40のそれぞれ円柱状本体41の端部には円筒形
の嵌合フランジ41aが設けられ、この嵌合フランジ4
1aをフェルール3,4側の嵌合スリット3c,4cに
差し込んで嵌合凸部3b,4bに嵌合させている。Next, FIG. 6 and FIG. 7 show the third of FIG.
It is an assembly sectional view and an exploded perspective view showing a 4th embodiment which should also be called a modification of an embodiment. In this case, at each end of the ferrules 3 and 4, annular convex portions 3b and 4b are provided on the concentric circles of the central axis, and annular fitting slits 3c and 4c are provided around the convex portions. Correspondingly, a cylindrical fitting flange 41a is provided at the end of each cylindrical body 41 of the two light guide members 40.
1a is inserted into the fitting slits 3c and 4c on the ferrules 3 and 4 side and fitted into the fitting convex portions 3b and 4b.
【0025】次に、図8および図9は、上記第3,第4
実施の形態で示したフェルール/導光部材の嵌合構造に
代えて、ねじ結合構造による第5実施の形態を示す組立
断面図と分解斜視図である。すなわち、フェルール3,
4の各端面から突出した形で雄ねじ部3d,4dを設
け、それに対応して2つの導光部材50のそれぞれ円柱
状本体51の端部に雌ねじ部51aを設けて、それら雌
雄ねじを螺合させて一体化した構造である。Next, FIG. 8 and FIG. 9 show the above third and fourth embodiments.
It is an assembly sectional view and an exploded perspective view showing a 5th embodiment by a screw coupling structure instead of the ferrule / light guide member fitting structure shown in the embodiment. That is, the ferrule 3,
4, the male screw portions 3d and 4d are provided so as to project from the respective end faces, and correspondingly, female screw portions 51a are provided at the end portions of the cylindrical main bodies 51 of the two light guide members 50, respectively, and these female and male screws are screwed together. This is an integrated structure.
【0026】以上から、図4〜図9に示す第3,第4,
第5実施の形態においては、光ファイバ1,2間に間隙
6を設ける必要がある事情の場合、その間隙6および光
ファイバ1,2同士の間で軸ずれ(垂直ずれ)が生じて
いようとも、導光部材30,40,50によってその間
隙と軸ずれ分の光接続損失や反射損失を吸収して最小限
に抑えることができる。それにより、光接続スリーブ5
などからなる光コネクタへの加工や組付精度に高精度を
要求されずに済み、それだけ部材の製作コストを安価に
抑えることができる。From the above, the third, fourth, and fourth shown in FIGS.
In the fifth embodiment, in the case where the gap 6 needs to be provided between the optical fibers 1 and 2, even if there is an axis shift (vertical shift) between the gap 6 and the optical fibers 1 and 2. The light guide members 30, 40, 50 can absorb and minimize the optical connection loss and reflection loss corresponding to the gap and the axis shift. Thereby, the optical connection sleeve 5
It is not necessary to have high precision in processing or assembling the optical connector made of, for example, and the manufacturing cost of the member can be reduced to that extent.
【0027】ここで、第1,第2実施の形態を含む各実
施の形態の利点を以下にまとめる。
光ファイバ1,2の端面1a,2aと導光部材の導光
レンズとの間の距離が様々に変更可能であり、設計上の
自由度がある点である。
導光部材の本体内に導光レンズを内蔵させて一体成形
できるので、部品点数の増加が抑えられ、光ファイバ
1,2のコア径が200μm以上のものでは、安価な樹
脂成形が可能で、しかも高精度の光接続効率のものが得
られる。
第3,第4,第5実施の形態においては、それぞれ導
光部材30,40,50から光ファイバ1,2のコア径
よりも大きなビーム径で平行な光が出射または入射され
るので、対向するフェルール3,4間の垂直方向の軸ず
れや間隙によって光接続効率が低下するのを抑えること
ができる。
特に、図4〜図9で示された各実施の形態のように、
フェルール3,4の各端部に導光部材が嵌合方式または
ねじ込み方式で強固に結合されているので、組立効率が
高く作業性が向上する利点がある。
第3,第4,第5実施の形態においては、光ファイバ
端面1a,2aと導光レンズとの間の距離を任意に設定
し、あるいは導光レンズを選択することによって、それ
ぞれ導光部材30,40,50から出射または入射され
る光のビーム径を大きくでき、結果として光ファイバ
1,2同士の垂直方向への軸ずれを修正して、光軸調芯
機能によって光接続損失を最小限に抑えることができ
る。Here, the advantages of each embodiment including the first and second embodiments are summarized below. The distance between the end faces 1a and 2a of the optical fibers 1 and 2 and the light guide lens of the light guide member can be variously changed, and there is a degree of freedom in design. Since the light guide lens can be built into the main body of the light guide member and integrally molded, an increase in the number of parts can be suppressed, and if the core diameter of the optical fibers 1 and 2 is 200 μm or more, inexpensive resin molding is possible. Moreover, highly accurate optical connection efficiency can be obtained. In the third, fourth, and fifth embodiments, since parallel light is emitted or made incident on the light guide members 30, 40, and 50 with a beam diameter larger than the core diameter of the optical fibers 1 and 2, respectively, It is possible to suppress a decrease in optical connection efficiency due to a vertical axis shift or a gap between the ferrules 3 and 4 to be used. In particular, as in the embodiments shown in FIGS. 4 to 9,
Since the light guide member is firmly coupled to each end of the ferrules 3 and 4 by the fitting method or the screwing method, there is an advantage that the assembling efficiency is high and the workability is improved. In the third, fourth, and fifth embodiments, the distance between the optical fiber end faces 1a and 2a and the light guide lens is arbitrarily set, or the light guide lens is selected, so that the light guide member 30 is obtained. , 40, 50 can increase the beam diameter of the light emitted or incident, and as a result correct the axial misalignment between the optical fibers 1 and 2 and minimize the optical connection loss by the optical axis alignment function. Can be suppressed to
【0028】なお、図10および図11は、導光部材だ
けに関する別の実施の形態を示している。図10の導光
部材60は、本体61の弾性や可撓性を利用して球状の
導光レンズ62を内部に押し込み、その上から蓋部材6
3で閉塞した構造である。蓋部材63は本体61に嵌合
形式で強固に結合させたり、接着手段で接合させて取り
付けることができる。図11の導光部材70は、球状の
導光レンズ72の外周にあたかも外殻のように本体71
を樹脂コーティングしてなっており、全体がボールのご
ときものである。10 and 11 show another embodiment relating only to the light guide member. The light guide member 60 of FIG. 10 uses the elasticity and flexibility of the main body 61 to push the spherical light guide lens 62 into the inside thereof, and the lid member 6 from above.
The structure is closed by 3. The lid member 63 can be firmly attached to the main body 61 in a fitting manner, or can be attached by being joined by an adhesive means. The light guide member 70 of FIG. 11 has a body 71 on the outer periphery of a spherical light guide lens 72 as if it were an outer shell.
Is coated with resin, and the whole is like a ball.
【0029】またなお、上記各実施の形態においては、
光ファイバ1,2同士を光学的接続を行う場合が示され
たが、光ファイバと受光素子や発光素子などからなる受
発光ユニットとの光学的接続を行う場合も勿論可能であ
る。Furthermore, in each of the above embodiments,
Although the case where the optical fibers 1 and 2 are optically connected to each other has been shown, it is of course possible to optically connect the optical fiber to the light emitting / receiving unit including a light receiving element or a light emitting element.
【0030】また、導光部材の導光レンズに関して、各
実施の形態とも球状のものが示されたが、集光レンズ機
能が備わるならば片側端部や両側端部が球形になった円
柱状など他の構造のものでもよい。Further, regarding the light guide lens of the light guide member, a spherical shape is shown in each of the embodiments, but if it has a condensing lens function, one end or both ends have a cylindrical shape. Other structures may be used.
【0031】[0031]
【発明の効果】以上説明したように、本発明にかかる請
求項1に記載のレンズ入り光コネクタは、筒状の光ファ
イバ接続スリーブの内部に嵌合させて導光部材をセット
し、例えば光ファイバの先端部に固定したフェルールを
その光ファイバ接続スリーブの両端から挿入すると、光
ファイバ間の間隙によって生じる光接続損失を導光部材
で抑えるのに有効である。As described above, in the optical connector with lens according to the first aspect of the present invention, the light guide member is set by fitting it into the inside of the cylindrical optical fiber connection sleeve, and, for example, an optical connector is used. When the ferrule fixed to the tip of the fiber is inserted from both ends of the optical fiber connecting sleeve, it is effective to suppress the optical connection loss caused by the gap between the optical fibers by the light guide member.
【0032】また、請求項2に記載のレンズ入り光コネ
クタは、光ファイバおよびフェルールのそれぞれ端面が
前記導光部材の本体両端面に密接しているので、端面反
射などを生じることなく、光接続損失を抑えることがで
きる。Further, in the optical connector with a lens according to a second aspect, since the end faces of the optical fiber and the ferrule are in close contact with both end faces of the main body of the light guide member, the optical connection can be achieved without causing end face reflection. Loss can be suppressed.
【0033】また、請求項3に記載のレンズ入り光コネ
クタは、フェルールの先端部に設けた嵌合凸部を導光部
材に設けた嵌合凹部に凹凸嵌合させることで、光ファイ
バ端面とフェルール端面を導光部材に強固に密接させる
ことができる。Further, in the optical connector with a lens according to a third aspect of the present invention, the fitting convex portion provided at the front end portion of the ferrule is fitted into the fitting concave portion provided at the light guide member to form an end face with the optical fiber. The ferrule end face can be firmly brought into close contact with the light guide member.
【0034】また、請求項4に記載のレンズ入り光コネ
クタは、前記導光部材の本体の材質としてポリウレタン
系やポリエステル系のエラストマを用いれば、特に車載
環境に好適であり、車体振動や衝撃に対して所要の柔軟
性、耐摩耗性、耐衝撃性を備えて光ファイバの端面やフ
ェルールの端面が損傷を受けず保護される。Further, the optical connector with a lens according to a fourth aspect of the present invention is particularly suitable for an in-vehicle environment when a polyurethane-based or polyester-based elastomer is used as the material of the body of the light guide member, and is resistant to vehicle body vibration and impact. On the other hand, the end face of the optical fiber and the end face of the ferrule are protected without being damaged by providing the required flexibility, abrasion resistance and impact resistance.
【図1】本発明にかかるレンズ入り光コネクタの実施の
形態において、送受信用の光ファイバ間の光学的接続を
導光部材を介して行う態様を示す第1実施の形態の組立
断面図である。FIG. 1 is an assembled cross-sectional view of a first embodiment showing a mode in which an optical connector for transmission and reception is optically connected via a light guide member in an embodiment of an optical connector with a lens according to the present invention. .
【図2】導光部材の本体の透過性に関する特性を示すグ
ラフである。FIG. 2 is a graph showing characteristics relating to the transparency of the body of the light guide member.
【図3】第2実施の形態の導光部材を示す組立断面図で
ある。FIG. 3 is an assembled sectional view showing a light guide member according to a second embodiment.
【図4】フェルールと導光部材との嵌合方式による第3
実施の形態を示す側面断面図である。FIG. 4 is a third example of a fitting method of a ferrule and a light guide member.
It is a side surface sectional view showing an embodiment.
【図5】第3実施の形態の分解斜視図である。FIG. 5 is an exploded perspective view of a third embodiment.
【図6】同じくフェルールと導光部材との嵌合方式によ
る第4実施の形態を示す側面断面図である。FIG. 6 is a side sectional view showing a fourth embodiment in which a ferrule and a light guide member are fitted together.
【図7】第4実施の形態の分解斜視図である。FIG. 7 is an exploded perspective view of a fourth embodiment.
【図8】フェルールと導光部材とのねじ込み方式による
第5実施の形態を示す側面断面図である。FIG. 8 is a side sectional view showing a fifth embodiment in which a ferrule and a light guide member are screwed together.
【図9】第5実施の形態の分解斜視図である。FIG. 9 is an exploded perspective view of a fifth embodiment.
【図10】導光部材に関する別の実施の形態を示す断面
図である。FIG. 10 is a cross-sectional view showing another embodiment of a light guide member.
【図11】導光部材に関するさらに別の実施の形態を示
す断面図である。FIG. 11 is a cross-sectional view showing still another embodiment of the light guide member.
1,2 光ファイバ 1a,2a ファイバ端面 3,4 フェルール 3a,4a 嵌合凸部 3c,4c 嵌合スリット 3d,4d 雄ねじ部 5 光ファイバ接続スリーブ 10,20,30,40,50,60,70 導光部材 11,21,31,41,51 本体 11a,11b 本体端面 12,22,23,32,42 導光レンズ 31a 嵌合凹部 41a 嵌合フランジ 51a 雌ねじ部 1, 2 optical fiber 1a, 2a Fiber end face 3,4 ferrule 3a, 4a Fitting convex part 3c, 4c Mating slit 3d, 4d male thread 5 Optical fiber connection sleeve 10,20,30,40,50,60,70 Light guide member 11,21,31,41,51 body 11a, 11b Main body end surface 12,22,23,32,42 Light guide lens 31a Fitting recess 41a Mating flange 51a female screw part
フロントページの続き Fターム(参考) 2H036 MA06 QA22 QA54 2H037 AA01 BA03 BA12 CA14 DA02 DA06 DA15 Continued front page F-term (reference) 2H036 MA06 QA22 QA54 2H037 AA01 BA03 BA12 CA14 DA02 DA06 DA15
Claims (4)
光ファイバ接続スリーブと、 この光ファイバ接続スリーブの内部中央部に嵌合される
光透過性の本体を有し、この本体の内部に導光レンズを
内蔵した導光部材と、を備えてなっていることを特徴と
するレンズ入り光コネクタ。1. A cylindrical optical fiber connecting sleeve which constitutes an optical connector housing, and a light-transmissive main body which is fitted in an inner central portion of the optical fiber connecting sleeve, and guides the light inside the main body. An optical connector with a lens, comprising: a light guide member having a built-in lens.
先端部に固定されたフェルールを前記光ファイバ接続ス
リーブの内周に対向させて嵌合させ、光ファイバおよび
フェルールのそれぞれ端面を前記導光部材の本体の両端
面に密接させてなっていることを特徴とする請求項1に
記載のレンズ入り光コネクタ。2. A ferrule fixed to each tip of one of the transmitting and receiving optical fibers is fitted to the inner circumference of the optical fiber connecting sleeve so as to face each other, and the end faces of the optical fiber and the ferrule are guided to each other. The optical connector with a lens according to claim 1, wherein the optical member is in close contact with both end surfaces of the main body of the optical member.
材が嵌合方式またはねじ螺合方式で結合して一体化され
てなっていることを特徴とする請求項2に記載のレンズ
入り光コネクタ。3. The lens-incorporated light according to claim 2, wherein the light guide member is coupled to and integrated with each tip of the ferrule by a fitting method or a screw screwing method. connector.
撃に対して所要の硬度を有する柔軟性と、耐摩耗性と、
耐衝撃性を備え、前記導光レンズが所要の光透過性およ
び屈折率を備えてなっていることを特徴とする請求項
1,2または3に記載のレンズ入り光コネクタ。4. The body of the light guide member has flexibility having a required hardness against vehicle body vibration and impact, and wear resistance,
The optical connector with a lens according to claim 1, wherein the light guide lens has impact resistance, and the light guide lens has a required light transmittance and a required refractive index.
Priority Applications (1)
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---|---|---|---|
JP2002051965A JP3794628B2 (en) | 2002-02-27 | 2002-02-27 | Optical connector with lens |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002051965A JP3794628B2 (en) | 2002-02-27 | 2002-02-27 | Optical connector with lens |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2003255184A true JP2003255184A (en) | 2003-09-10 |
JP3794628B2 JP3794628B2 (en) | 2006-07-05 |
Family
ID=28663804
Family Applications (1)
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JP2002051965A Expired - Fee Related JP3794628B2 (en) | 2002-02-27 | 2002-02-27 | Optical connector with lens |
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006350142A (en) * | 2005-06-20 | 2006-12-28 | Utsunomiya Univ | Collimator lens module manufacturing method, collimator lens module manufactured thereby and its manufacturing apparatus |
JP2010518989A (en) * | 2007-02-21 | 2010-06-03 | カオ グループ、インク. | Modular laser transmission system |
WO2013022908A1 (en) * | 2011-08-10 | 2013-02-14 | Tyco Electronics | Field-installable expanded beam connector system |
WO2014129280A1 (en) * | 2013-02-20 | 2014-08-28 | 株式会社オートネットワーク技術研究所 | Optical connector device |
KR20140109378A (en) * | 2011-11-15 | 2014-09-15 | 몰렉스 인코포레이티드 | Wide temperature range optical fiber connector with thermal expansion compensation |
JP2017111444A (en) * | 2015-12-15 | 2017-06-22 | ラディアル | Device for coupling two optical fibers, intended to be used in connectors |
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2002
- 2002-02-27 JP JP2002051965A patent/JP3794628B2/en not_active Expired - Fee Related
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006350142A (en) * | 2005-06-20 | 2006-12-28 | Utsunomiya Univ | Collimator lens module manufacturing method, collimator lens module manufactured thereby and its manufacturing apparatus |
JP4691637B2 (en) * | 2005-06-20 | 2011-06-01 | 国立大学法人宇都宮大学 | Collimator lens module manufacturing method, collimator lens module and manufacturing apparatus thereof |
JP2010518989A (en) * | 2007-02-21 | 2010-06-03 | カオ グループ、インク. | Modular laser transmission system |
WO2013022908A1 (en) * | 2011-08-10 | 2013-02-14 | Tyco Electronics | Field-installable expanded beam connector system |
US8827567B2 (en) | 2011-08-10 | 2014-09-09 | Tyco Electronics Corporation | Field-installable expanded beam connector system |
KR20140109378A (en) * | 2011-11-15 | 2014-09-15 | 몰렉스 인코포레이티드 | Wide temperature range optical fiber connector with thermal expansion compensation |
EP2780750A4 (en) * | 2011-11-15 | 2015-10-07 | Molex Inc | Wide temperature range optical fiber connector with thermal expansion compensation |
US9977194B2 (en) | 2011-11-15 | 2018-05-22 | Molex, Llc | Wide temperature range optical fiber connector with thermal expansion compensation |
WO2014129280A1 (en) * | 2013-02-20 | 2014-08-28 | 株式会社オートネットワーク技術研究所 | Optical connector device |
JP2017111444A (en) * | 2015-12-15 | 2017-06-22 | ラディアル | Device for coupling two optical fibers, intended to be used in connectors |
Also Published As
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