JPS6322944B2 - - Google Patents
Info
- Publication number
- JPS6322944B2 JPS6322944B2 JP12465079A JP12465079A JPS6322944B2 JP S6322944 B2 JPS6322944 B2 JP S6322944B2 JP 12465079 A JP12465079 A JP 12465079A JP 12465079 A JP12465079 A JP 12465079A JP S6322944 B2 JPS6322944 B2 JP S6322944B2
- Authority
- JP
- Japan
- Prior art keywords
- ferrule
- optical fiber
- insertion hole
- terminal member
- bush
- 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.)
- Expired
Links
- 239000013307 optical fiber Substances 0.000 claims description 31
- 238000003780 insertion Methods 0.000 claims description 21
- 230000037431 insertion Effects 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims 1
- 239000002184 metal Substances 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 239000010437 gem Substances 0.000 description 2
- 229910001751 gemstone Inorganic materials 0.000 description 2
- 229910000915 Free machining steel Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000010979 ruby Substances 0.000 description 1
- 229910001750 ruby Inorganic materials 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/36—Mechanical coupling means
- G02B6/38—Mechanical coupling means having fibre to fibre mating means
- G02B6/3807—Dismountable connectors, i.e. comprising plugs
- G02B6/3833—Details of mounting fibres in ferrules; Assembly methods; Manufacture
- G02B6/3834—Means for centering or aligning the light guide within the ferrule
- G02B6/3843—Means for centering or aligning the light guide within the ferrule with auxiliary facilities for movably aligning or adjusting the fibre within its ferrule, e.g. measuring position or eccentricity
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/36—Mechanical coupling means
- G02B6/38—Mechanical coupling means having fibre to fibre mating means
- G02B6/3807—Dismountable connectors, i.e. comprising plugs
- G02B6/3833—Details of mounting fibres in ferrules; Assembly methods; Manufacture
- G02B6/3834—Means for centering or aligning the light guide within the ferrule
- G02B6/3835—Means for centering or aligning the light guide within the ferrule using discs, bushings or the like
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mechanical Coupling Of Light Guides (AREA)
- Grinding Of Cylindrical And Plane Surfaces (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
Description
【発明の詳細な説明】
本発明は光フアイバを光学的に高精度で突き合
せて相互接続するのに好適な光フアイバ端末部材
の製造方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing an optical fiber terminal member suitable for optically abutting and interconnecting optical fibers with high precision.
従来光フアイバを高精度で突き合せて使用する
場合に、光フアイバ端末部に要求される機能は二
つあつて、その一つは光フアイバ端を保護強化す
ることで他の一つは光フアイバを高精度（同心度
２〜３ミクロン）で軸合せして突き合せ光学的に
接続するための基準面となることである。そのた
めに各種の方法が提案されているが、例えば第１
図に示すものは金属又は宝石製のブツシユ１の中
心に設けた挿通孔１１と外径との同心度を高精度
で作り、これを同じく内径と外径とを高精度で同
心に作つた中空円筒状金属製のフエルール２の一
端に取り付けて光フアイバ端末部材３を構成し、
上記フエルール内に外被を有する光フアイバ４で
あつてその一端の外被を除去してコアとクラツド
からなる裸の光フアイバ５を突出させたものを挿
入し、該裸の光フアイバをブツシユ１の挿通孔に
挿通して固定したものである。しかしこの方法で
はフエルール２の内外径を同心に高精度で仕上げ
る加工が困難であり、また金属又は宝石製のブツ
シユ１の内外径を同時加工する方法によりその同
心度を高精度で仕上げたとしても、フエルール２
の内径とブツシユ１の外径との間には多少の隙間
があるのでこれが取り付け上の誤差となる等、裸
の光フアイバとフエルール外径との同心度を低下
させる各種の欠点があつた。 Conventionally, when optical fibers are used by butting them together with high precision, there are two functions required of the optical fiber terminal section: one is to strengthen the protection of the optical fiber end, and the other is to protect the optical fiber end. This is to serve as a reference surface for aligning with high precision (concentricity of 2 to 3 microns), butting and optically connecting. Various methods have been proposed for this purpose.
The one shown in the figure is a hollow hole made by making the concentricity of the outer diameter and the insertion hole 11 provided in the center of the bush 1 made of metal or jewelry with high precision, and also making the inner diameter and outer diameter concentric with high precision. It is attached to one end of a cylindrical metal ferrule 2 to constitute an optical fiber terminal member 3,
An optical fiber 4 having an outer sheath, with the outer sheath removed at one end to protrude a bare optical fiber 5 consisting of a core and a cladding, is inserted into the ferrule, and the bare optical fiber is inserted into the bush 1. It is inserted into the insertion hole and fixed. However, with this method, it is difficult to finish the inner and outer diameters of the ferrule 2 concentrically with high precision, and even if the inner and outer diameters of the metal or jeweled bush 1 are simultaneously machined with high precision, the concentricity can be finished with high precision. , Ferrule 2
Since there is a slight gap between the inner diameter of the bushing 1 and the outer diameter of the bushing 1, there are various drawbacks such as an error in installation and a reduction in concentricity between the bare optical fiber and the outer diameter of the ferrule.
本発明の目的はこれらの欠点を除き、構造は第
１図に示すものと同様であるがその加工工程を改
良することによつて、極めて高精度の同心度を有
する光フアイバ端末部材を容易に作ることができ
る光フアイバ端末部材の製造方法を提供すること
にある。 The purpose of the present invention is to eliminate these drawbacks, and to easily produce an optical fiber terminal member having extremely high concentricity by improving the processing process although the structure is similar to that shown in FIG. An object of the present invention is to provide a method for manufacturing an optical fiber terminal member.
以下本発明に係る実施例について図面を参照し
ながら詳細に説明する。光フアイバ端末部材（以
下端末部材という）３の構造は第１図におけるも
のと同様でありブツシユ１は後述の加工の場合の
摩耗を防ぐために金属例えば硬度のやゝ高い快削
性の鋼又は宝石例えばルビー、サフアイア不透明
な宝石或いはセラミツクからなり、中心に挿通孔
１１を有し、該挿通孔径と外径とは同時加工によ
り同心度の精度を上げたものとする。この加工の
場合挿通孔１１の孔径は、そこに挿通する裸の光
フアイバ５の外径より５〜７ミクロン大きい程度
の高精度なものとなるように注意を払い外径の寸
法はフエルール２の内径よりやゝ小さくし、それ
程の精度を必要としない。フエルール２の内径は
外被を有する光フアイバ４の外径よりやゝ大きく
し、これもそれ程の精度を必要としない。またフ
エルール２の外径は、例えば2.5ミリに仕上げる
場合は2.5ミリより10〜15ミクロン程度大きく作
り内外径の同心度も高精度を必要としない。次に
ブツシユ１をフエルール２の一端にはめ込み接着
又はかしめ止めした後、第２図に示す方法でフエ
ルールの外周を修正研削する。第２図において修
正すべき端末部材３は、研削盤（図示せず）上に
おいてブツシユ１の挿通孔１１に該挿通孔の径よ
りやゝ小さい支持棒６が挿入され、またブツシユ
１を取りつけていない側は、上記支持棒６と略同
心をなしかつその軸まわりを自由回転しうる心金
７により支持される。砥石８はモータ（図示せ
ず）により回転され、必要に応じてフエルールの
軸方向に往復運動をする。上記砥石８はフエルー
ル２外周に適当な圧力をもつて押し当てられてい
るので、その回転によりフエルールもその両端を
前記支持棒６と心金７とで支持されて回転するが
滑りや回転摩擦等によりフエルール外周の周辺速
度は砥石のそれよりも当然遅いからその速度の差
によりフエルール外周は研削されることになる。
第３図は端末部材３をブツシユ１を取り付けた側
から見た図であつてd1〜d8は挿通孔１１の円周と
フエルール外周との距離である。研削前はd1〜d8
はそれぞれ等しくないが上記の研削によりd1〜d8
は一定値ｄに等しくなるように修正することがで
きる。以上によつて端末部材３はブツシユ１の挿
通孔１１を基準として加工されるので挿通孔１１
とフエルール２の外周とは正しく同心にできる。
このように加工された端末部材３へ第１図の如く
光フアイバ４，５を取り付けるが、上述のとおり
裸の光フアイバ５と挿通孔１１との間には５〜７
ミクロン程度の隙間があるので、裸の光フアイバ
２の外面に接着剤を塗つた状態で容易に挿通孔に
挿通することができ、かつ挿通後裸の光フアイバ
５に挿通孔１１の径方向の力が加わらないように
保持して接着剤を固化させれば、接着剤の表面張
力が有効に作用して裸の光フアイバ２が挿通孔１
１の中心から片寄ることがなく殆ど１ミクロン程
度の中心のずれで固定することができる。 Embodiments of the present invention will be described in detail below with reference to the drawings. The structure of the optical fiber terminal member (hereinafter referred to as the terminal member) 3 is the same as that shown in FIG. 1, and the bush 1 is made of metal such as a slightly hard free-cutting steel or a jewel to prevent wear during the processing described below. For example, it is made of ruby, sapphire, an opaque gemstone, or ceramic, and has an insertion hole 11 in the center, and the diameter of the insertion hole and the outer diameter are simultaneously machined to improve concentricity. In this process, care must be taken to ensure that the diameter of the insertion hole 11 is highly accurate, 5 to 7 microns larger than the outer diameter of the bare optical fiber 5 inserted therein, and the outer diameter dimension is that of the ferrule 2. It is slightly smaller than the inner diameter and does not require that much precision. The inner diameter of the ferrule 2 is made slightly larger than the outer diameter of the optical fiber 4 having a jacket, and this also does not require much precision. Further, when finishing the ferrule 2 to 2.5 mm, for example, the outer diameter should be about 10 to 15 microns larger than 2.5 mm, and the concentricity of the inner and outer diameters does not need to be highly accurate. Next, the bush 1 is fitted into one end of the ferrule 2 and bonded or caulked, and then the outer periphery of the ferrule is corrected and ground by the method shown in FIG. In FIG. 2, the terminal member 3 to be modified is constructed by inserting a support rod 6 into the insertion hole 11 of the bush 1 on a grinding machine (not shown), which is slightly smaller in diameter than the diameter of the insertion hole, and attaching the bush 1. The other side is supported by a mandrel 7 which is substantially concentric with the support rod 6 and can freely rotate around its axis. The grindstone 8 is rotated by a motor (not shown) and reciprocates in the axial direction of the ferrule as required. Since the grindstone 8 is pressed against the outer periphery of the ferrule 2 with appropriate pressure, the ferrule also rotates with its both ends supported by the support rod 6 and the mandrel 7, but slippage and rotational friction occur. Therefore, the peripheral speed of the outer circumference of the ferrule is naturally slower than that of the grindstone, so the outer circumference of the ferrule is ground due to the difference in speed.
FIG. 3 is a view of the terminal member 3 viewed from the side to which the bush 1 is attached, and d 1 to d 8 are the distances between the circumference of the insertion hole 11 and the outer circumference of the ferrule. d 1 to d 8 before grinding
are not equal, but due to the above grinding, d 1 to d 8
can be modified to be equal to a constant value d. As described above, the terminal member 3 is processed using the insertion hole 11 of the bush 1 as a reference, so the insertion hole 11
and the outer circumference of ferrule 2 can be made correctly concentric.
The optical fibers 4 and 5 are attached to the terminal member 3 processed in this way as shown in FIG.
Since there is a gap on the order of microns, the bare optical fiber 2 can be easily inserted into the insertion hole with adhesive applied to the outer surface, and after insertion, the bare optical fiber 5 can be inserted into the insertion hole 11 in the radial direction. If the adhesive is allowed to solidify while being held without applying force, the surface tension of the adhesive will work effectively and the bare optical fiber 2 will be inserted into the insertion hole 1.
1, and can be fixed with a center deviation of approximately 1 micron.
以上の説明から明らかなように本発明によれ
ば、光フアイバと光フアイバ端末部材との接着作
業における同心度の誤差においては従来例と違い
はないが光フアイバ端末部材の挿通孔１１とフエ
ルール２の外径との同心度の誤差を極度に小さく
できる点で大きな違いがある。しかも光フアイバ
を光フアイバ端末部材に接着しないうちに光フア
イバ端末部材の修正加工を行なうので作業が極め
て簡単であり、かつ接着後の裸の光フアイバとフ
エルールの外周との同心度の誤差を実用上必要と
される２〜３ミクロンとすることが容易にできる
など実用上の利点と効果は非常に大きい。 As is clear from the above description, according to the present invention, there is no difference in concentricity error in the bonding work between the optical fiber and the optical fiber terminal member compared to the conventional example, but the insertion hole 11 of the optical fiber terminal member and the ferrule 2 The major difference is that the error in concentricity with the outer diameter of the Furthermore, since the optical fiber end member is modified before it is bonded to the optical fiber end member, the work is extremely simple, and the error in concentricity between the bare optical fiber and the outer circumference of the ferrule after bonding can be practically corrected. It has great practical advantages and effects, such as the ability to easily achieve the required 2 to 3 microns.
第１図は従来例及び実施例の両方を説明する中
心軸に沿つた断面図、第２図は実施例のフエルー
ル外周の修正加工方法の説明図、第３図は光フア
イバ端末部材をブツシユの側から見た場合の挿通
孔とフエルール外周との各寸法を示す図である。
１……ブツシユ、２……フエルール、３……光
フアイバ端末部材、６……支持棒、８……砥石、
１１……挿通孔。
Fig. 1 is a cross-sectional view taken along the central axis to explain both the conventional example and the embodiment, Fig. 2 is an explanatory diagram of the method of modifying the outer periphery of the ferrule in the embodiment, and Fig. 3 is a sectional view of the optical fiber terminal member in a bush. It is a figure which shows each dimension of the insertion hole and the outer periphery of a ferrule when seen from the side. 1... Bush, 2... Ferrule, 3... Optical fiber terminal member, 6... Support rod, 8... Grindstone,
11...Insertion hole.
Claims (1)
を挿通する挿通孔を有し上記フエルールの一端に
はめ込まれて固定されたブツシユとを含み、上記
ブツシユの挿通孔は上記フエルールの外周と同心
を保たれる光フアイバ端末部材の製造方法におい
て、上記ブツシユの挿通孔に支持棒を挿通し、砥
石を上記フエルールの外周に押し当てながら回転
させることにより上記フエルールを上記支持棒の
軸まわりに回転させて該フエルールの外周を研削
し、フエルール外周を上記ブツシユの挿通孔を中
心として同心になるように修正することを特徴と
する光フアイバ端末部材の製造方法。1. A hollow cylindrical ferrule and a bushing having an insertion hole in the center through which a bare optical fiber is inserted and fitted and fixed to one end of the ferrule, the insertion hole of the bushing being kept concentric with the outer periphery of the ferrule. In the method for manufacturing an optical fiber terminal member, a support rod is inserted into the insertion hole of the bush, and a grindstone is rotated while pressing against the outer periphery of the ferrule, thereby rotating the ferrule around the axis of the support rod. A method of manufacturing an optical fiber terminal member, which comprises: grinding the outer circumference of the ferrule and modifying the outer circumference of the ferrule so that it is concentric with the insertion hole of the bushing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12465079A JPS5648605A (en) | 1979-09-27 | 1979-09-27 | Production of optical fiber terminal member |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12465079A JPS5648605A (en) | 1979-09-27 | 1979-09-27 | Production of optical fiber terminal member |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5648605A JPS5648605A (en) | 1981-05-01 |
| JPS6322944B2 true JPS6322944B2 (en) | 1988-05-13 |
Family
ID=14890650
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12465079A Granted JPS5648605A (en) | 1979-09-27 | 1979-09-27 | Production of optical fiber terminal member |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5648605A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60128408A (en) * | 1983-12-15 | 1985-07-09 | Hitachi Chem Co Ltd | Production of ferrule for optical connector |
| JPS62222209A (en) * | 1986-03-24 | 1987-09-30 | Sumitomo Electric Ind Ltd | Multicore optical connector ferrule and its production |
| JP2003107294A (en) * | 2001-09-27 | 2003-04-09 | Mitsubishi Cable Ind Ltd | Optical connector for laser, and laser guide |
| KR100476066B1 (en) * | 2002-01-05 | 2005-03-10 | 나노솔루션주식회사 | Method for processing inside diameter of Zirconia ceramic sleeve for fiber optic communication connector and apparatus using the same |
-
1979
- 1979-09-27 JP JP12465079A patent/JPS5648605A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5648605A (en) | 1981-05-01 |
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