JPS6315843Y2 - - Google Patents
Info
- Publication number
- JPS6315843Y2 JPS6315843Y2 JP1982098019U JP9801982U JPS6315843Y2 JP S6315843 Y2 JPS6315843 Y2 JP S6315843Y2 JP 1982098019 U JP1982098019 U JP 1982098019U JP 9801982 U JP9801982 U JP 9801982U JP S6315843 Y2 JPS6315843 Y2 JP S6315843Y2
- Authority
- JP
- Japan
- Prior art keywords
- lens
- support
- optical fiber
- fiber
- diameter
- 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 36
- 239000000835 fiber Substances 0.000 claims description 30
- 239000000853 adhesive Substances 0.000 claims description 16
- 230000001070 adhesive effect Effects 0.000 claims description 16
- 238000003780 insertion Methods 0.000 claims description 16
- 230000037431 insertion Effects 0.000 claims description 16
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 230000003287 optical effect Effects 0.000 description 7
- 239000002184 metal Substances 0.000 description 4
- 239000010437 gem Substances 0.000 description 2
- 229910001751 gemstone Inorganic materials 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000004830 Super Glue Substances 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- FGBJXOREULPLGL-UHFFFAOYSA-N ethyl cyanoacrylate Chemical compound CCOC(=O)C(=C)C#N FGBJXOREULPLGL-UHFFFAOYSA-N 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- -1 jewelry Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
Landscapes
- Mechanical Coupling Of Light Guides (AREA)
Description
【考案の詳細な説明】
本考案は光フアイバーを他の光フアイバーある
いは光応用機器類に接続するための光フアイバー
端子に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an optical fiber terminal for connecting an optical fiber to another optical fiber or optical application equipment.
光フアイバーを他の光フアイバーあるいは光源
装置、光信号処理装置等の機器類に接続する場
合、光フアイバーから拡散出射する光を平行光に
変換するとともに平行入射する光を集束してフア
イバーに入射させる機能をもつ平面レンズが光フ
アイバー先端に取りつけられて用いられ、このよ
うな集束・平行光変換用のレンズの付いた光フア
イバープラグとしては、従来第１図に示す構造の
ものが使用されていた。 When connecting an optical fiber to other optical fibers or equipment such as a light source device or an optical signal processing device, the diffused light emitted from the optical fiber is converted into parallel light, and the parallel incident light is focused and made to enter the fiber. A functional plane lens is attached to the tip of an optical fiber, and the structure shown in Figure 1 has traditionally been used as an optical fiber plug with a lens for focusing and collimating light. .
第１図において１は集束・平行光変換用の平面
レンズであり、一般的には屈折率が中心軸上で最
大で周辺に向けて放物線状に減少するような屈折
率分布をもつ両端が平行平面の透明なガラスある
いはプラスチツクからなる円柱状の屈折率分布型
レンズの４分の１周期長のものが使用される。 In Figure 1, numeral 1 is a plane lens for converging and collimating light, and generally has a refractive index distribution such that the refractive index is maximum on the central axis and decreases parabolically toward the periphery, and both ends are parallel. A cylindrical graded index lens made of flat transparent glass or plastic and having a quarter period length is used.
このレンズ１の端面に光フアイバー２を接続す
るために、レンズ１の一方の端面に中心軸をレン
ズ光軸と一致させてフアイバー支持チユーブ３を
接着剤４で接合し、この一体化したレンズ１およ
びチユーブ３をプラグチユーブに内装して接着固
定した構造のプラグを使用している。 In order to connect the optical fiber 2 to the end surface of this lens 1, a fiber support tube 3 is bonded to one end surface of the lens 1 with an adhesive 4 with its central axis aligned with the lens optical axis, and this integrated lens 1 A plug is used in which the tube 3 is placed inside the plug tube and fixed with adhesive.
上記従来構造の光フアイバープラグではレンズ
１とフアイバー支持チユーブ３との接合に当り両
者を密着状態にして接着剤４を塗布しても両部材
１，３間に不可避的に存在する微小空隙を通して
接着剤４が毛管現象でチユーブ３のフアイバー挿
通孔３Ａ内に浸透してしまい、この接着剤４が光
フアイバー２の端面のレンズ１端面への密着を阻
害し光学的な接続損失が大になるという問題があ
つた。 In the optical fiber plug of the conventional structure described above, even if the lens 1 and the fiber support tube 3 are brought into close contact with each other and the adhesive 4 is applied, the bond passes through the micro-gaps that inevitably exist between the two members 1 and 3. The adhesive 4 penetrates into the fiber insertion hole 3A of the tube 3 due to capillary action, and this adhesive 4 prevents the end face of the optical fiber 2 from adhering to the end face of the lens 1, resulting in a large optical connection loss. There was a problem.
本考案は上述の従来の問題点を解決し、レンズ
に対する光フアイバーの接続効率が非常に良好な
光フアイバー端子を提供することを目的としてい
る。 The present invention aims to solve the above-mentioned conventional problems and to provide an optical fiber terminal with very good connection efficiency of the optical fiber to the lens.
以下本考案を図面に示した実施例について詳細
に説明する。 Embodiments of the present invention shown in the drawings will be described in detail below.
第２図は本考案の光フアイバー端子の縦断面図
であり、集束・平行光変換用の屈折率分布型レン
ズ１０の一方の端面にフアイバー支持体１１を中
心軸を合せて接着剤１２で一体に接合している。 FIG. 2 is a longitudinal cross-sectional view of the optical fiber terminal of the present invention, in which a fiber support 11 is integrated with an adhesive 12 with its central axis aligned with one end surface of a gradient index lens 10 for converging/parallel light conversion. It is joined to.
フアイバー支持体１１はセラミクス，宝石，ガ
ラス，樹脂，金属等で構成されている円筒チユー
ブであり、その孔１３の内径は支持体１１の大部
分の長さにわたり接続される光フアイバーの外径
よりも僅かに大きく、一例としてフアイバー外径
を125μとして孔１３の内径は127μφ前後に仕上げ
られている。 The fiber support 11 is a cylindrical tube made of ceramics, jewelry, glass, resin, metal, etc., and the inner diameter of the hole 13 is larger than the outer diameter of the optical fiber connected over most of the length of the support 11. For example, the outer diameter of the fiber is 125μ, and the inner diameter of the hole 13 is around 127μΦ.
そして挿通孔１３のうちレンズ１０の端面に接
する出口端の孔径d2を中央部分の孔径d1よりも拡
大してある。 The hole diameter d 2 at the exit end of the insertion hole 13 that is in contact with the end surface of the lens 10 is larger than the hole diameter d 1 at the central portion.
具体的には支持体１１のレンズ側端面から深さ
l2にわたり内径d2の孔径拡大部分１３Ａを設けて
いる。 Specifically, the depth from the lens side end surface of the support 11
An enlarged hole diameter portion 13A having an inner diameter d 2 is provided over l 2 .
ここで出口端の孔径d2はあまり中央部分孔径d1
に近い場合は毛管現象で支持体１１内に浸入した
接着剤１２が接続される光フアイバーの先端が当
接する位置まで入り込むのでd2をd1の少なくとも
２倍以上にとることが望ましい。 Here, the hole diameter d 2 at the outlet end is less than the hole diameter d 1 at the central part.
If it is close to , the adhesive 12 that has penetrated into the support 11 due to capillary action will penetrate to the position where the tip of the optical fiber to be connected comes into contact, so it is desirable that d 2 be at least twice as large as d 1 .
また孔拡大部分１３Ａの長さl2はあまり短かい
と浸入接着剤を逃がすスペースが充分確保され
ず、一方あまり長くすると光フアイバー先端に位
置ずれを生じるようになるのでl2は支持体１１の
全長l1の２分の１以下に抑えることが望ましい。
支持体１１の他端側には光フアイバーの挿通を容
易にするために外方に拡大するテーパ孔部分１３
Ｂが形成してある。 In addition, if the length l 2 of the hole enlarged portion 13A is too short, there will not be enough space for the infiltrated adhesive to escape, and if it is too long, the tip of the optical fiber will be misaligned. It is desirable to suppress the total length to one-half or less of the total length l1 .
The other end of the support 11 has a tapered hole portion 13 that expands outward to facilitate insertion of the optical fiber.
B is formed.
フアイバー支持体１１は外径に特に制限はない
がプラグチユーブ内にレンズ１０および支持体１
１を収納することを考慮するレンズ１０の外径の
１／３以下程度にするのが望ましい。また支持体１
１の長さl1はあまり短かい場合にはフアイバー先
端の位置決め保持が不充分となりあまり長いと取
扱い時に接着層剥離等をおこしやすくなるので一
般にl1を1m／ｍないし20m／ｍの範囲内に選ぶこ
とが好ましい。 There is no particular limit to the outer diameter of the fiber support 11, but the lens 10 and the support 1 can be placed inside the plug tube.
It is desirable that the outer diameter of the lens 10 is about ⅓ or less of the outer diameter of the lens 10 in which the lens 10 is accommodated. Also, support 1
If the length l 1 of 1 is too short, the positioning and retention of the fiber tip will be insufficient, and if it is too long, the adhesive layer will easily peel off during handling, so generally l 1 is within the range of 1 m/m to 20 m/m. It is preferable to choose.
上記構造の光フアイバー端子レンズに光フアイ
バーを接続する場合は第３図に示すように支持体
１１の挿通孔１３に光フアイバー１４の先端部分
を通し、フアイバー１４の端面をレンズ１０端面
に密着させ、支持体１１のテーパ孔部分１３Ｂで
支持体１１とフアイバー１４との間を瞬間接着剤
などの接着剤１２により固定する。 When connecting an optical fiber to the optical fiber terminal lens having the above structure, the tip of the optical fiber 14 is passed through the insertion hole 13 of the support 11 as shown in FIG. The support 11 and the fiber 14 are fixed at the tapered hole portion 13B of the support 11 with an adhesive 12 such as an instant adhesive.
これにより、他の光フアイバーに接続された端
子レンズ、光源等から出射してレンズ１０に入射
した光束は集束されて光フアイバー１４内に効率
良く伝送される。また同様に光フアイバー１４か
ら拡散出射した光はレンズ１０で平行光束に変換
されて出射し、対向配置した上記と同様の端子レ
ンズを装着した光フアイバー、あるいは光信号処
理装置等に入る。 As a result, the light beams emitted from terminal lenses, light sources, etc. connected to other optical fibers and incident on the lens 10 are focused and efficiently transmitted into the optical fibers 14. Similarly, the light diffused and emitted from the optical fiber 14 is converted into a parallel light beam by the lens 10 and emitted, and enters an optical fiber equipped with a terminal lens similar to the above disposed facing each other, or an optical signal processing device.
第４図に本考案の他の実施例を示す。 FIG. 4 shows another embodiment of the present invention.
本例は集束・平行光変換用の平面レンズ１０の
端面に接合するフアイバー支持体１１を、全長に
わたり内径の一様な金属スリーブ１６内にこのス
リーブ１６よりも若干短かい宝石チユーブ１７を
内嵌した構造としたものである。 In this example, a fiber support 11 that is bonded to the end face of a plane lens 10 for focusing and collimating light conversion is fitted into a metal sleeve 16 that has a uniform inner diameter over its entire length, and a jeweled tube 17 that is slightly shorter than the sleeve 16 is fitted inside the metal sleeve 16. The structure is as follows.
そして宝石チユーブ１７にフアイバー挿通孔１
３と入口端のテーパ孔１３Ｂを設け、宝石チユー
ブ１７の先端と金属スリーブ１６の端部との間に
若干の空隙を残してこの部分を接着剤逃しのため
の孔径拡大部分１３Ａとした構造である。 Then, the fiber insertion hole 1 is inserted into the jewel tube 17.
3 and a tapered hole 13B at the entrance end, a slight gap is left between the tip of the jewel tube 17 and the end of the metal sleeve 16, and this part is made into a hole diameter enlarged part 13A for adhesive release. be.
第５図は本考案のさらに別の実施例を示す。 FIG. 5 shows yet another embodiment of the invention.
本例は支持体１１のフアイバー挿通孔１３両端
部にそれぞれ設けられる孔径拡大部分１３Ａとテ
ーパ孔部分１３Ｂとを同一形状の外方拡大テーパ
孔とした構造である。 This example has a structure in which the enlarged diameter portion 13A and the tapered hole portion 13B provided at both ends of the fiber insertion hole 13 of the support body 11 are outwardly enlarged tapered holes of the same shape.
次にレンズ１０とフアイバー支持体１１芯合せ
の好適な方法について第６図により説明する。 Next, a preferred method for aligning the lens 10 and the fiber support 11 will be explained with reference to FIG.
レンズ１０をレーザ光源の前方に配置した支持
装置１８を固定するとともに、支持体１１の端面
をレンズ１０の端面に密接または近接させた状態
で可動支持装置１９に固定する。支持体１１の挿
通孔１３に光量モニター用フアイバー２０の先端
を通してその端面をレンズ１０の端面に接触させ
ておく。 A support device 18 in which the lens 10 is disposed in front of a laser light source is fixed, and the end surface of the support body 11 is fixed to a movable support device 19 with the end surface of the lens 10 closely or close to the end surface. The tip of the light amount monitoring fiber 20 is passed through the insertion hole 13 of the support 11 so that its end surface is brought into contact with the end surface of the lens 10.
またモニター用フアイバー２０の他端側には、
レンズ１０と同様の屈折率分布型レンズ２１を接
続してフアイバーからの出射光を平行光に変換
し、これを受光素子２２で受けて受光量を光量モ
ニター２３で測定する。 In addition, on the other end side of the monitor fiber 20,
A gradient index lens 21 similar to the lens 10 is connected to convert the light emitted from the fiber into parallel light, which is received by a light receiving element 22 and the amount of received light is measured by a light amount monitor 23.
上記装置において光源からの平行光束１５をレ
ンズ１０に入射させ、モニター２３でフアイバー
２０の伝送光量を測定しつつ支持体１１をレンズ
１０の光軸と直交する方向に移動させて受光量が
ピークを示す位置、つまりレンズ１０の光軸と支
持体１１の中心軸が一致する位置を探す。次に受
光量がピークを示す位置で支持体１１とレンズ１
０との間を硬化速度の非常に速い例えばシアノア
クリレート系の接着剤１２で固着した後、モニタ
ー用フアイバー２０を除去する。 In the above device, the parallel light beam 15 from the light source is made incident on the lens 10, and while the monitor 23 measures the amount of light transmitted through the fiber 20, the support 11 is moved in a direction perpendicular to the optical axis of the lens 10 until the amount of received light reaches its peak. Find the position shown, that is, the position where the optical axis of the lens 10 and the central axis of the support 11 coincide. Next, the support 11 and the lens 1 are placed at the position where the amount of light received peaks.
0 with a cyanoacrylate adhesive 12 having a very fast curing speed, for example, and then the monitoring fiber 20 is removed.
以上本考案を図示例について説明したが、要す
るに本考案は集束・平行光変換用の平面レンズの
一方の端面に、このレンズに接続される光フアイ
バーの外径にほぼ等しい径のフアイバー挿通孔を
設けた支持体を接着した光フアイバー端子レンズ
において、前記フアイバー挿通孔のレンズ端面に
接する部分の孔径を中央部よりも拡大したことを
要旨としており、本考案によればレンズとフアイ
バー挿通孔を設けた支持体とを接着する場合に、
レンズ端面と支持体端面との間の隙間を通して支
持体内に接着剤が侵入しても孔径拡大部分による
逃げがあるため、フアイバー先端が当接するレン
ズ面部分まで接着剤が至ることなく、したがつて
支持体の挿通孔に通した光フアイバー先端面を確
実にレンズ面に密着させることができて伝送光の
接続ロスが従来に比べて大きく改善される。 The present invention has been described above with reference to the illustrated example, but in short, the present invention has a fiber insertion hole with a diameter approximately equal to the outer diameter of the optical fiber connected to this lens, on one end surface of a plane lens for converging and collimating light conversion. In an optical fiber terminal lens to which a provided support is adhered, the diameter of the portion of the fiber insertion hole in contact with the end surface of the lens is made larger than that of the central portion.According to the present invention, the lens and the fiber insertion hole are provided. When bonding with a support
Even if the adhesive penetrates into the support through the gap between the lens end face and the support end face, there is escape due to the enlarged hole diameter portion, so the adhesive does not reach the lens surface where the fiber tip comes into contact. The tip end surface of the optical fiber passed through the insertion hole of the support can be reliably brought into close contact with the lens surface, and connection loss of transmitted light can be greatly improved compared to the conventional method.
第１図は従来の光フアイバー端子レンズにおけ
る問題を示す縦断面図、第２図は本考案の一実施
例を示す縦断面図、第３図は第２図の端子レンズ
に光フアイバーを接続した状態を示す縦断面図、
第４図は本考案の他の実施例を示す縦断面図、第
５図は本考案のさらに別の実施例を示す縦断面
図、第６図は本考案のフアイバー支持体とレンズ
とを芯合せする方法の一例を模式的に示す縦断面
図である。
１，１０……集束・平行光変換用の平面レン
ズ、１１……フアイバー支持体、１２……接着
剤、１３……フアイバー挿通孔、１３Ａ……孔径
拡大部分、１５……光束。
Fig. 1 is a vertical cross-sectional view showing problems with the conventional optical fiber terminal lens, Fig. 2 is a longitudinal cross-sectional view showing an embodiment of the present invention, and Fig. 3 is a cross-sectional view showing an optical fiber connected to the terminal lens of Fig. 2. A vertical cross-sectional view showing the condition,
FIG. 4 is a longitudinal sectional view showing another embodiment of the invention, FIG. 5 is a longitudinal sectional view showing still another embodiment of the invention, and FIG. 6 is a longitudinal sectional view showing the fiber support and lens of the invention. It is a longitudinal cross-sectional view which shows typically an example of the method of matching. DESCRIPTION OF SYMBOLS 1, 10...Plane lens for focusing/parallel light conversion, 11...Fiber support, 12...Adhesive, 13...Fiber insertion hole, 13A...Portion with enlarged hole diameter, 15...Light flux.
Claims (1)
面に、このレンズに接続される光フアイバーの
外径にほぼ等しい径のフアイバー挿通孔を設け
た外径が前記レンズ外径よりも小さく且つ前記
フアイバー挿通孔のレンズ端面に接する部分の
孔径を中央部よりも拡大した支持体を、レンズ
面に密着させてレンズ面と支持体側縁との間で
接着し、前記支持体の挿通孔に光フアイバーを
挿通し、その端面を接着剤を介さずにレンズ面
に密着させて、支持体とフアイバーとの間を接
着固定して成る光フアイバー端子。 (2) フアイバー挿通孔のレンズ端面に接する孔径
を中央部における内径の２倍以上とした実用新
案登録請求の範囲第１項記載の光フアイバー端
子。 (3) 孔径拡大部分の長さl2を0.5mm以上で支持体全
長の1/2以下とした実用新案登録請求の範囲第
１項記載の光フアイバー端子。[Claims for Utility Model Registration] (1) A fiber insertion hole with a diameter approximately equal to the outer diameter of the optical fiber connected to this lens is provided on one end surface of a flat lens for focusing and collimating light conversion. A support whose diameter is smaller than the outer diameter of the lens and whose hole diameter is larger at a portion of the fiber insertion hole in contact with the lens end surface than at the center is brought into close contact with the lens surface and bonded between the lens surface and the side edge of the support. An optical fiber terminal comprising: inserting an optical fiber into the insertion hole of the support, bringing the end face of the optical fiber into close contact with the lens surface without using an adhesive, and fixing the support and the fiber with adhesive. (2) The optical fiber terminal according to claim 1, wherein the diameter of the fiber insertion hole in contact with the end surface of the lens is at least twice the inner diameter of the central portion. (3) The optical fiber terminal according to claim 1, wherein the length l 2 of the enlarged hole diameter portion is 0.5 mm or more and 1/2 or less of the total length of the support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9801982U JPS594509U (en) | 1982-06-29 | 1982-06-29 | fiber optic terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9801982U JPS594509U (en) | 1982-06-29 | 1982-06-29 | fiber optic terminal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS594509U JPS594509U (en) | 1984-01-12 |
| JPS6315843Y2 true JPS6315843Y2 (en) | 1988-05-06 |
Family
ID=30232907
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9801982U Granted JPS594509U (en) | 1982-06-29 | 1982-06-29 | fiber optic terminal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS594509U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5809866B2 (en) * | 2011-07-21 | 2015-11-11 | オリンパス株式会社 | Optical element module, optical transmission module, and optical transmission module manufacturing method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5614611A (en) * | 1979-07-12 | 1981-02-12 | Matsushita Electric Ind Co Ltd | Flow direction controller |
| JPS5738401A (en) * | 1980-08-19 | 1982-03-03 | Matsushita Electric Ind Co Ltd | Color filter |
| JPS5740911B2 (en) * | 1978-02-14 | 1982-08-31 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5740911U (en) * | 1980-08-20 | 1982-03-05 |
-
1982
- 1982-06-29 JP JP9801982U patent/JPS594509U/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5740911B2 (en) * | 1978-02-14 | 1982-08-31 | ||
| JPS5614611A (en) * | 1979-07-12 | 1981-02-12 | Matsushita Electric Ind Co Ltd | Flow direction controller |
| JPS5738401A (en) * | 1980-08-19 | 1982-03-03 | Matsushita Electric Ind Co Ltd | Color filter |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS594509U (en) | 1984-01-12 |
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