JPH0731061B2 - Structure of optical coupler for fiber gyro - Google Patents
Structure of optical coupler for fiber gyroInfo
- Publication number
- JPH0731061B2 JPH0731061B2 JP15742888A JP15742888A JPH0731061B2 JP H0731061 B2 JPH0731061 B2 JP H0731061B2 JP 15742888 A JP15742888 A JP 15742888A JP 15742888 A JP15742888 A JP 15742888A JP H0731061 B2 JPH0731061 B2 JP H0731061B2
- Authority
- JP
- Japan
- Prior art keywords
- substrate
- optical coupler
- optical
- fiber gyro
- fiber
- 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.)
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Description
【発明の詳細な説明】 「産業上の利用分野」 この発明はファイバジャイロ用光カプラの構造に関す
る。The present invention relates to the structure of an optical coupler for a fiber gyro.
「従来の技術」 第５図に示すように、１対の光ファイバ１の中間部が互
に結合されて細棒状の合体部２と４本のピグテイル３と
が構成され、その合体部２が細長い第１基板４上に接着
剤等により固定されて、光結合素子６が構成される。“Prior Art” As shown in FIG. 5, the middle portions of a pair of optical fibers 1 are coupled to each other to form a thin rod-shaped united portion 2 and four pigtails 3. The optical coupling element 6 is configured by being fixed on the elongated first substrate 4 with an adhesive or the like.
光結合素子６の第１基板４が第６図に示すように、ガラ
ス管７内に挿入されて接着剤により固定され、ピグテイ
ル３がガラス管７の両端より導出され、その両端が接着
剤等で充填されてファイバジャイロ用光カプラ８が構成
される。As shown in FIG. 6, the first substrate 4 of the optical coupling element 6 is inserted into the glass tube 7 and fixed by an adhesive, the pigtails 3 are led out from both ends of the glass tube 7, and both ends thereof are adhesive or the like. The optical coupler 8 for the fiber gyro is configured by being filled with.
従来のファイバジャイロは第７図に示すように、円板状
のジャイロベース10上に糸巻き状の中空のボビン11に巻
回されたファイバコイル12が取付けられ、そのボビン11
の中空円筒の中心軸を挟んで互に対向する１対の支持柱
13がジャイロベース10上に植立てられ、その上に上記光
カプラ８が載せられ、例えば接着剤で固定される。ま
た、光カプラ８の下方にファイバジャイロ用部材（光
源、光検出器、他）14がジャイロベース10上に取付けら
れる。光カプラ８の各１対のピグテイル３はガラス管７
より導出されると直ちに互いに離れる方向に湾曲され、
図示していないが、ボビン11の内周面に沿って螺旋状に
立上げられると共にその内周面に接着剤で固定されてボ
ビン11の開口より外部に導出され、ファイバコイル等に
接続される。As shown in FIG. 7, a conventional fiber gyro is equipped with a fiber coil 12 wound around a bobbin 11 having a bobbin shape on a disk-shaped gyro base 10, and the bobbin 11
Pair of support columns facing each other across the central axis of the hollow cylinder
13 is planted on the gyro base 10, and the optical coupler 8 is placed on the gyro base 10 and fixed by, for example, an adhesive. Further, a fiber gyro member (light source, photodetector, etc.) 14 is attached below the optical coupler 8 on the gyro base 10. Each pair of pigtails 3 of the optical coupler 8 is a glass tube 7.
As soon as it is drawn out, it is curved away from each other,
Although not shown, it is spirally raised along the inner peripheral surface of the bobbin 11, is fixed to the inner peripheral surface with an adhesive, is led out from the opening of the bobbin 11, and is connected to a fiber coil or the like. .
「発明が解決しようとする課題」 従来の光カプラ８は第１基板４をガラス管７内に接着剤
で固定した後、ピグテイルをガラス管７の両端で接着剤
で固定支持する構造であり、組立の作業性が悪く、比較
的大きな工数を必要とするために高価であった。[Problems to be Solved by the Invention] The conventional optical coupler 8 has a structure in which the first substrate 4 is fixed in the glass tube 7 with an adhesive, and then the pigtail is fixed and supported by the adhesive at both ends of the glass tube 7. The workability of assembling was poor, and a relatively large number of man-hours were required, which was expensive.
また、、ファイバジャイロの組立において、ガラス管よ
り導出されたピグテイルに対し強い力がかかって断線す
ることのないようにゆっくり曲げてファイバ用ボビンの
内周面に接着固定しなければならないが、作業性が悪い
構造であるため組立工数が大きくなり、ファイバジャイ
ロの原価上昇の一因をなしていた。Also, when assembling the fiber gyro, the pigtail drawn out from the glass tube must be slowly bent and adhesively fixed to the inner peripheral surface of the fiber bobbin so as not to break the wire due to strong force. Due to the poor structure, the number of assembling steps was large, which contributed to the cost increase of the fiber gyro.
この発明の目的は光カプラ自身を経済化すると共にそれ
を組込むファイバジャイロの経済化に寄与できるような
構造に改良することである。An object of the present invention is to improve the structure such that the optical coupler itself can be made economical and the fiber gyro incorporating the optical coupler can be made economical.
「課題を解決するための手段」 上記目的を達成するために、本発明では、１対の光ファ
イバの長手方向における中間部が互に結合されて細棒状
の合体部とされ、その合体部の両端より光ファイバが導
出されてピグテイルとされ、上記合体部が細長い第１基
板上に固定されて光結合素子が構成され、その光結合素
子が組込まれるべきファイバジャイロのファイバコイル
用ボビンの内径より僅かに小さい外形を有する第２基板
の中央部に１個又は複数個の上記光結合素子の第１基板
が固定されると共に、上記光結合素子のピグテイルが上
記第２基板の外周に沿って固定されてファイバジャイロ
用光カプラが構成される。[Means for Solving the Problems] In order to achieve the above object, in the present invention, the intermediate portions in the longitudinal direction of a pair of optical fibers are coupled to each other to form a thin rod-shaped united portion, and the united portion is An optical fiber is led out from both ends to form a pigtail, and the united portion is fixed on an elongated first substrate to form an optical coupling element. From the inner diameter of the fiber coil bobbin of the fiber gyro into which the optical coupling element is to be incorporated. One or more first substrates of the optical coupling device are fixed to the central portion of the second substrate having a slightly small outer shape, and pigtails of the optical coupling device are fixed along the outer periphery of the second substrate. Thus, an optical coupler for fiber gyro is constructed.
上記第２基板に上記第１基板を収容するための収容溝を
設けるのが望ましい。It is desirable that the second substrate be provided with a housing groove for housing the first substrate.
また、上記第２基板に上記ピグテイルを案内するための
円弧状の案内溝を設けるのが望ましい。Further, it is desirable to provide an arc-shaped guide groove for guiding the pigtail on the second substrate.
「実施例」 この発明の実施例を図面を参照して説明する。第１図Ａ
はこの発明の光カプラ８を示すもので、既に述べた光結
合素子６（第５図）をファイバジャイロのファイバコイ
ル用ボビンの内径より僅かに小さい外形をもつ円板状の
第２基板（金属、セラミック又は合成樹脂より成る）11
に実装して構成したものである。同図において第１基板
４は第２基板11の１つの直径に沿い、板面の中央部に接
着剤で固定される。第１基板４の両端より導出されたピ
グテイル３はファイバの結合部の延長方向において接着
剤22により板面に固定されると同時に、それぞれ２本の
ピグテイルが互に分離され、それぞれ反対方向に湾曲さ
れ、第２基板21の周縁に沿って曲げられ、第１基板４の
長手方向と直交する第２基板11の直径の両端付近におい
て接着剤23により固定される。[Embodiment] An embodiment of the present invention will be described with reference to the drawings. Figure 1A
Shows an optical coupler 8 of the present invention, in which the optical coupling element 6 (FIG. 5) described above is used as a second disc-shaped substrate (metal) having an outer shape slightly smaller than the inner diameter of the fiber coil bobbin of the fiber gyro. , Made of ceramic or synthetic resin) 11
It is implemented and configured. In the figure, the first substrate 4 is fixed along the diameter of the second substrate 11 to the central portion of the plate surface with an adhesive. The pigtails 3 led out from both ends of the first substrate 4 are fixed to the plate surface by an adhesive 22 in the extension direction of the fiber coupling portion, and at the same time, two pigtails are separated from each other and curved in opposite directions. Then, the second substrate 21 is bent along the peripheral edge of the second substrate 21, and is fixed by an adhesive 23 near both ends of the diameter of the second substrate 11 orthogonal to the longitudinal direction of the first substrate 4.
第１図Ｂに示すものは２個の光結合素子６を第１図Ａと
同様に円板状の第２基板21に実装した例であり、第１図
Ｃは横断面が楕円状であるファイバコイル用ボビンの中
空孔内に取付けるようにした光カプラ８の一例を示すも
ので、この例では２個の光結合素子６が楕円の長径に沿
って板面の中央部に離れて実装され、各光結合素子６の
両端における一方のピグテイルが互に連結された場合で
ある。第１図A,B及びＣいずれの場合も第２基板21の外
形は収容されるべきファイバコイル用ボビンの内径より
僅かに小さくされている。FIG. 1B shows an example in which two optical coupling elements 6 are mounted on a disk-shaped second substrate 21 as in FIG. 1A, and FIG. 1C has an elliptical cross section. This shows an example of the optical coupler 8 which is mounted in the hollow hole of the fiber coil bobbin. In this example, two optical coupling elements 6 are mounted separately in the central portion of the plate surface along the major axis of the ellipse. , One of the pigtails at both ends of each optical coupling element 6 is connected to each other. In any of FIGS. 1A, 1B and 1C, the outer shape of the second substrate 21 is slightly smaller than the inner diameter of the fiber coil bobbin to be housed.
第２図は第１図Ａの光カプラを組込んだファイバジャイ
ロを示したものであり、ボビン11の内周面には、光カプ
ラ８の第２基板21を載せるための突起11aが一体に形成
されている。FIG. 2 shows a fiber gyro incorporating the optical coupler of FIG. 1A, and a protrusion 11a for mounting the second substrate 21 of the optical coupler 8 is integrally formed on the inner peripheral surface of the bobbin 11. Has been formed.
第３図は、第２基板21に光結合素子６の第１基板４を収
容するための細長い方形状の収容溝30を板面の中央部に
設けると共にピグテイル３を案内するための円弧状の案
内溝31を周縁に沿って設けた例を示したものである。第
２基板21の第１基板収容溝30の長手方向と直交する直径
の両端において、第２基板21の周縁の一部が切欠かれ
て、第１基板収容溝30の長手方向と平行に一対の直線縁
32が形成される。また第１基板収容溝30の短辺縁30aよ
り第２基板21の周縁をのぞんで扇状凹部33が形成され
る。扇状凹部33の深さａは第１基板収容溝の深さｂより
小さく、例えばｂの1/2程度とされている。両者の差ｂ
−ａは収容すべき第１基板４の厚味にほぼ等しく設定さ
れる。ピグテイル案内溝31はその深さを扇状凹部の深さ
ａとほぼ等しくされ、扇状凹部33の端縁33aより直線縁3
2に向けて第２基板21の周縁に沿って形成される。FIG. 3 shows that the second substrate 21 is provided with an elongated rectangular accommodation groove 30 for accommodating the first substrate 4 of the optical coupling element 6 in the central portion of the plate surface and has an arc shape for guiding the pigtail 3. It shows an example in which the guide groove 31 is provided along the peripheral edge. At both ends of the diameter of the second substrate 21 orthogonal to the longitudinal direction of the first substrate accommodating groove 30, a part of the peripheral edge of the second substrate 21 is cut out so as to be parallel to the longitudinal direction of the first substrate accommodating groove 30. Straight edge
32 is formed. Further, a fan-shaped recess 33 is formed from the short side edge 30a of the first substrate accommodating groove 30 to the periphery of the second substrate 21. The depth a of the fan-shaped recess 33 is smaller than the depth b of the first substrate accommodating groove, and is about 1/2 of b, for example. Difference b
-A is set to be approximately equal to the thickness of the first substrate 4 to be accommodated. The depth of the pigtail guide groove 31 is made substantially equal to the depth a of the fan-shaped recessed portion, and the straight edge 3 from the end edge 33a of the fan-shaped recessed portion 3
It is formed along the peripheral edge of the second substrate 21 toward 2.
第４図は、第３図の第２基板21に光結合素子６を実装し
て構成した光カプラ８を示したものである。光結合素子
６の第１基板４は第１基板収容溝30の底面に接着剤34で
固定される。第１基板４の両端より導出されたピグテイ
ル３は扇状凹部33に延長されて接着剤22で固定されると
共に２本のピグテイル３が互に離れる方向に湾曲され、
ピグテイル案内溝内を案内され、接着剤23で溝内に固定
された後直線縁32側より溝外に導出される。FIG. 4 shows an optical coupler 8 constructed by mounting the optical coupling element 6 on the second substrate 21 of FIG. The first substrate 4 of the optical coupling element 6 is fixed to the bottom surface of the first substrate accommodating groove 30 with an adhesive 34. The pigtails 3 led out from both ends of the first substrate 4 are extended to the fan-shaped recesses 33 and fixed with the adhesive 22, and the two pigtails 3 are curved in a direction away from each other.
It is guided in the pigtail guide groove, fixed in the groove with an adhesive 23, and then led out of the groove from the side of the straight edge 32.
第１図B,Cに示した光カプラについてもその第２基板に
上述のような第１基板収容溝及び／又はピグテイル案内
溝を適宜に設けるのが望ましい。Also in the optical couplers shown in FIGS. 1B and 1C, it is desirable to appropriately provide the above-mentioned first substrate accommodating groove and / or pigtail guide groove in the second substrate.
「発明の効果」 この発明の光カプラでは光結合素子を従来のガラス管に
代って第２基板に接着固定すればよいので、組立作業が
やり易く、組立工数を縮減でき、原価低減が可能であ
る。[Advantages of the Invention] In the optical coupler of the present invention, the optical coupling element may be bonded and fixed to the second substrate instead of the conventional glass tube, so that the assembly work is easy, the number of assembly steps can be reduced, and the cost can be reduced. Is.
光カプラの第２基板はファイバコイル用ボビンの内周面
に例えば突起などにより簡単に取付けることができるた
め、従来のような支持柱が不要となる。またピグテイル
は第２基板の周に沿う方向に基板外に導出されるので、
ファイバコイル用ボビンの内周面に沿って螺旋状にピグ
テイルを立上げて行くのに都合がよく、その作業時間を
短縮できる。このようにこの発明は光カプラの経済化は
もとより、それが組込まれるファイバジャイロの部品点
数の縮減と組立工数の低減をもたらし、ファイバジャイ
ロの経済化に著しく寄与するものである。The second substrate of the optical coupler can be easily attached to the inner peripheral surface of the fiber coil bobbin by, for example, a protrusion or the like, so that a conventional supporting column is unnecessary. Also, since the pigtail is led out of the substrate in the direction along the circumference of the second substrate,
It is convenient to start up the pigtail spirally along the inner peripheral surface of the fiber coil bobbin, and the working time can be shortened. As described above, the present invention not only makes the optical coupler economical, but also reduces the number of parts of the fiber gyro in which it is incorporated and the assembly man-hours, and significantly contributes to the economicalization of the fiber gyro.
光カプラの第２基板に第１基板収容溝を設けた場合に
は、その溝の深さを調整すれば、第１基板の板面とファ
イバを接着剤22で固定すべき場所の板面とをほぼ同一の
水平面上にそろえることができるので、つまり段差がな
いのでファイバを一直線に張ることができ、接着剤22に
よるピグテイルの接着作業がやり易くなる。また、応力
の影響に最も敏感なその直線部分に曲げ応力を与えずに
接着することができるので、温度等の環境条件が大きく
変っても、曲げ応力により接着剤22を基板より引きはが
そうとする力が発生されず、耐環境性の優れた接着が可
能となる。When the first substrate accommodating groove is provided on the second substrate of the optical coupler, by adjusting the depth of the groove, the plate surface of the first substrate and the plate surface of the place where the fiber should be fixed with the adhesive 22 are formed. Can be aligned on substantially the same horizontal plane, that is, since there is no step, the fiber can be stretched in a straight line, and the operation of bonding the pigtail with the adhesive 22 is facilitated. In addition, since it is possible to bond the linear portion, which is most sensitive to the influence of stress, without applying bending stress, it is possible to peel the adhesive 22 from the substrate due to bending stress even if environmental conditions such as temperature change greatly. Therefore, it is possible to perform bonding with excellent environment resistance.
第２基板にピグテイル基板溝を設けた場合には、振動や
衝撃に対してピグテイルをより安定に保持することがで
きる。また第１基板より導出されたピグテイルを互に相
似に曲げることが容易であり、曲げにより光のロスが生
じても、４本のピグテイルで同量だけ生じるので取扱い
上都合がよい。When the pigtail substrate groove is provided on the second substrate, the pigtail can be held more stably against vibration and impact. In addition, it is easy to bend the pigtails derived from the first substrate in a similar manner, and even if a loss of light occurs due to bending, the same amount is generated by the four pigtails, which is convenient for handling.
この発明の光カプラの構造はピグテイルの導出方法、第
２基板の形状等において、ファイバジャイロ用ボビン形
状との整合性が良く、ファイバジャイロの部品実装効率
の向上につながり、ファイバジャイロの小形軽量化も期
待できる。The structure of the optical coupler according to the present invention has good compatibility with the shape of the bobbin for the fiber gyro in the method of deriving the pigtail, the shape of the second substrate, etc., which leads to an improvement in the component mounting efficiency of the fiber gyro, thus reducing the size and weight of the fiber gyro. Can be expected.
第１図はこの発明のファイバジャイロ用光カプラの構造
を示す平面、第２図Ａ及びＢはそれぞれ第１図Ａの光カ
プラを組込んだファイバジャイロの一例を示す平面図及
びＡ−Ａ側断面図、第３図A,B及びＣはそれぞれ第１図
Ａの第２基板21の変形実施例を示す平面図、Ａ−Ａ側断
面図及びＢ−Ｂ側断面図、第４図Ａ及びＢはそれぞれ第
３図の第２基板21を用いた光カプラの一例を示す平面図
及びＡ−Ａ側断面図、第５図は従来及びこの発明で用い
られる光結合素子の平面図、第６図は従来の光カプラの
平面図、第７図Ａ及びＢはそれぞれ第６図の光カプラ８
を組込んだファイバジャイロの一例を示す平面図及びＡ
−Ａ側断面図である。FIG. 1 is a plan view showing a structure of an optical coupler for fiber gyro of the present invention, and FIGS. 2A and 2B are plan views showing an example of a fiber gyro incorporating the optical coupler of FIG. 1A and an AA side. Sectional views, FIGS. 3A, 3B, 3C and 3C are a plan view, a sectional view taken along the line AA and a sectional view taken along the line BB, and FIG. 4A and FIG. B is a plan view and an AA side sectional view showing an example of an optical coupler using the second substrate 21 of FIG. 3, respectively. FIG. 5 is a plan view of an optical coupling element used in the prior art and the present invention, and FIG. The figure is a plan view of a conventional optical coupler, and FIGS. 7A and 7B are optical couplers 8 of FIG. 6, respectively.
Plan view and A showing an example of a fiber gyro incorporating the
It is a -A side sectional view.
Claims (3)
部が互に結合されて細棒状の合体部とされ、その合体部
の両端より光ファイバが導出されてピグテイルとされ、
上記合体部が細長い第１基板上に固定されて光結合素子
が構成され、 その光結合素子が組込まれるべきファイバジャイロのフ
ァイバコイル用ボビンの内径より僅かに小さい外形を有
する第２基板の中央部に１個又は複数個の上記光結合素
子の第１基板が固定されると共に、上記光結合素子のピ
グテイルが上記第２基板の外周に沿って固定されている
ファイバジャイロ用光カプラの構造。1. A pair of optical fibers are joined together at their intermediate portions in the longitudinal direction to form a thin rod-shaped merged portion, and the optical fibers are led out from both ends of the merged portion to form a pigtail.
The united portion is fixed on an elongated first substrate to form an optical coupling element, and the central portion of a second substrate having an outer shape slightly smaller than the inner diameter of the fiber coil bobbin of the fiber gyro into which the optical coupling element is to be incorporated. A structure of an optical coupler for a fiber gyro, wherein one or a plurality of the first substrates of the optical coupling element are fixed to the first substrate and the pigtails of the optical coupling element are fixed along the outer periphery of the second substrate.
めの収容溝が形成された請求項（１）記載のファイバジ
ャイロ用光カプラの構造。2. The structure of an optical coupler for a fiber gyro according to claim 1, wherein an accommodation groove for accommodating the first substrate is formed in the second substrate.
るための円弧状の案内溝が形成された請求光（１）又は
（２）記載のファイバジャイロ用光カプラの構造。3. A structure of an optical coupler for a fiber gyro according to claim 1 or 2, wherein an arcuate guide groove for guiding the pigtail is formed on the second substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15742888A JPH0731061B2 (en) | 1988-06-24 | 1988-06-24 | Structure of optical coupler for fiber gyro |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15742888A JPH0731061B2 (en) | 1988-06-24 | 1988-06-24 | Structure of optical coupler for fiber gyro |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH025008A JPH025008A (en) | 1990-01-09 |
| JPH0731061B2 true JPH0731061B2 (en) | 1995-04-10 |
Family
ID=15649422
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15742888A Expired - Lifetime JPH0731061B2 (en) | 1988-06-24 | 1988-06-24 | Structure of optical coupler for fiber gyro |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0731061B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2652104B2 (en) * | 1992-05-19 | 1997-09-10 | 日本航空電子工業 株式会社 | Fiber optic gyro |
| JPH11281374A (en) * | 1998-03-27 | 1999-10-15 | Hitachi Cable Ltd | Optical fiber gyro |
| CN108507558B (en) * | 2018-03-28 | 2024-04-30 | 株洲菲斯罗克光电科技股份有限公司 | Lightweight triaxial integrated optical fiber gyroscope |
-
1988
- 1988-06-24 JP JP15742888A patent/JPH0731061B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH025008A (en) | 1990-01-09 |
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