JPS61267011A - Fixing method for optical fiber lens assembly - Google Patents

Fixing method for optical fiber lens assembly

Info

Publication number
JPS61267011A
JPS61267011A JP60108769A JP10876985A JPS61267011A JP S61267011 A JPS61267011 A JP S61267011A JP 60108769 A JP60108769 A JP 60108769A JP 10876985 A JP10876985 A JP 10876985A JP S61267011 A JPS61267011 A JP S61267011A
Authority
JP
Japan
Prior art keywords
optical fiber
lens assembly
block
fiber lens
optical
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
Application number
JP60108769A
Other languages
Japanese (ja)
Other versions
JPS6325646B2 (en
Inventor
Hisashi Takamatsu
高松 久志
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP60108769A priority Critical patent/JPS61267011A/en
Publication of JPS61267011A publication Critical patent/JPS61267011A/en
Publication of JPS6325646B2 publication Critical patent/JPS6325646B2/ja
Granted legal-status Critical Current

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  • Laser Beam Processing (AREA)
  • Light Guides In General And Applications Therefor (AREA)
  • Optical Couplings Of Light Guides (AREA)

Abstract

PURPOSE:To facilitate positioning and adjusting operation between the axis of an optical fiber lens assembly and an optical axis and to hold an adjustment position after laser welding accurate by narrowing down the part where the bottom surface of a block which abuts on a fitting table abuts on the fitting table, and forming no adhesive layer at this part. CONSTITUTION:An adhesive 9 is inserted into a groove 11 and a projection side block 10 is mounted on the fitting table 7 opposite optical parts 6 and adhered temporarily; and a desired peripheral part P of the bottom surface 12 is irradiated with laser light to fix the block to the fitting table 7 by laser welding. An adhesive 9 is inserted into the groove 11 of a photodetection side block 10, which is mounted on the fitting table 7 on the opposite side from the projection side block 10 about the optical parts 6 and slid on the fitting table 7 so that the intensity of photodetection of the optical fiber 2 is maximum, thereby adjusting its position so that the optical axis is aligned with the axis of the optical fiber lens assembly 1. The adhesive 9 set and then a desired peripheral part P of the bottom surface 12 is irradiated with laser light to fix the photodetection side block 10 to the fitting table 7 by laser welding.

Description

【発明の詳細な説明】 〔概要〕 ファイバレンズアセンブリを保持するブロックの底面に
、広幅の溝を設けて、ブロックの底面と取付台の取付面
との密着度を高めレーザー溶接することにより、光ファ
イバレンズアセンブリの固定の信頼度を向上せしめる。
[Detailed Description of the Invention] [Summary] A wide groove is provided on the bottom surface of the block that holds the fiber lens assembly, and by laser welding to increase the closeness between the bottom surface of the block and the mounting surface of the mounting base, the optical Improves the reliability of fixing the fiber lens assembly.

〔産業上の利用分野〕[Industrial application field]

本発明は、レンズと光ファイバとが所望に結合されてな
る光ファイバレンズアセンブリと、光学部品を介して対
向する他の光ファイバレンズアセンブリ等との光結合さ
せるための、光ファイバレンズアセンブリの固定方法の
改良に関する。
The present invention provides fixation of an optical fiber lens assembly for optically coupling an optical fiber lens assembly formed by combining a lens and an optical fiber with another optical fiber lens assembly, etc. facing each other via an optical component. Concerning improvements in methods.

光ファイバレンズアセンブリ1は、第2図の如くに構成
されているのが一般である。
The optical fiber lens assembly 1 is generally constructed as shown in FIG.

第2図において、光ファイバ2の端末部は、例えばステ
ンレス鋼よりなる円筒形のフェルール3の軸心孔に挿入
接着され、フェルール3の端面と光ファイバ2の端面と
は、研磨等され平坦に仕上げられている。
In FIG. 2, the end of the optical fiber 2 is inserted and bonded into the axial hole of a cylindrical ferrule 3 made of stainless steel, for example, and the end face of the ferrule 3 and the end face of the optical fiber 2 are polished or otherwise flattened. It is finished.

フェルール3は、円筒形のアセンブリホルダ5の軸心孔
の小径孔側に圧入され、小径孔と同心の大径孔側には、
レンズ(例えばドラムレンズ)4の球面が、軸心孔の段
付部に当接するように挿着されている。
The ferrule 3 is press-fitted into the small-diameter hole side of the axial hole of the cylindrical assembly holder 5, and the large-diameter hole side concentric with the small-diameter hole has a
The spherical surface of a lens (for example, a drum lens) 4 is inserted so as to abut against the stepped portion of the axial hole.

このように軸心孔の同心の小径孔側に、フェルール3が
挿入され、レンズ4の球面が軸心孔の段付部に当接する
ことにより、レンズ4の焦点が、光ファイバ2の端面位
置になるように、位置調整・されて、ファイバレンズア
センブリ1を構成している。
In this way, the ferrule 3 is inserted into the concentric small-diameter hole side of the axial hole, and the spherical surface of the lens 4 comes into contact with the stepped part of the axial hole, so that the focal point of the lens 4 is adjusted to the end face position of the optical fiber 2. The fiber lens assembly 1 is configured by adjusting the position so that it becomes .

このようなファイバレンズアセンブリ1は、まず、他の
光学部品、及び光学部品を介して対向する他のファイバ
レンズアセンブリを、共通する取付台の所望の位置に固
定し、その後、光結合度が最良になるごとくに、光ファ
イバレンズアセンブリの関係位置を調整して、取付台に
固定するが一般である。
Such a fiber lens assembly 1 is manufactured by first fixing other optical components and other fiber lens assemblies facing each other via the optical components at a desired position on a common mounting base, and then fixing the fiber lens assembly 1 in a manner that provides the best degree of optical coupling. It is common practice to adjust the relative position of the optical fiber lens assembly and secure it to the mount as required.

この際、光ファイバレンズアセンブリの軸心が、対向す
る光学部品の光軸に一致し、位置ずれすることのない固
定方法が要求されている。
At this time, there is a need for a fixing method in which the axis of the optical fiber lens assembly coincides with the optical axis of the opposing optical component and does not shift.

〔従来の技術〕 第3図は従来のファイバレンズアセンブリの固定方法を
示す斜視図であって、取付台7の上面の中央部には、光
学部品6 (例えばハーフミラ−)が固定されている。
[Prior Art] FIG. 3 is a perspective view showing a conventional method of fixing a fiber lens assembly, in which an optical component 6 (for example, a half mirror) is fixed to the center of the upper surface of a mounting base 7.

8A、8Bは、金属、例えばステンレス鋼が直方体状に
形成されてなる。ブロックであって、底面に並行して軸
心孔が穿設され、この軸心孔に光ファイバレンズアセン
ブリlが嵌入固着されている。
8A and 8B are made of metal, such as stainless steel, and are formed into a rectangular parallelepiped shape. It is a block, and an axial hole is bored in parallel with the bottom surface, and an optical fiber lens assembly 1 is fitted and fixed into this axial hole.

ブロック8A、8Bは直方体状であるので、複数のブロ
ックの、底面より軸心孔の軸心線との高さを、等しいよ
うに高精度に機械加工することは比較的容易である。
Since the blocks 8A and 8B have a rectangular parallelepiped shape, it is relatively easy to machine the plurality of blocks with high precision so that the heights from the bottom surface to the axis line of the shaft center hole are equal.

このようなブロックは、光学部品6を挟んで両側に対向
して、出射側の光ファイバレンズアセンブリ1を挿着し
た出射側ブロック8Aと、受光側の光ファイバレンズア
センブリ1を挿着した受光側ブロック8Bとが配設され
る。
Such a block includes an output side block 8A in which the optical fiber lens assembly 1 on the output side is inserted, and a light reception side block 8A in which the optical fiber lens assembly 1 on the light reception side is inserted, facing each other on both sides with the optical component 6 in between. Block 8B is arranged.

光ファイバレンズアセンブリlを取付台7に固定するに
は、まず出射側ブロック8八を光学部品6に対向する位
置に取付台7に載せ、出射側ブロック8Aの周辺の所望
の個所Pにレーザー光を照射して、取付台7にレーザー
溶接固定する。
To fix the optical fiber lens assembly l on the mounting base 7, first place the output side block 88 on the mounting base 7 at a position facing the optical component 6, and then apply a laser beam to a desired location P around the output side block 8A. is irradiated and fixed to the mounting base 7 by laser welding.

次に、受光側ブロック8Bの底面に接着剤9を薄く塗布
し、出射側ブロック8Aとは光学部品6に対して反対側
の取付台7上に載せ、光ファイバ2の受光強度が最大に
なるように、この受光側ブロック8Bを取付台7上を摺
動させ、光軸と光ファイバレンズアセンブリlの軸心が
一致するように位置調整を行う。
Next, apply a thin layer of adhesive 9 to the bottom surface of the light-receiving block 8B, and place the light-emitting block 8A on the mounting base 7 on the opposite side of the optical component 6, so that the light receiving intensity of the optical fiber 2 is maximized. The light-receiving block 8B is slid on the mounting base 7, and the position is adjusted so that the optical axis and the axis of the optical fiber lens assembly l coincide with each other.

位置調整が終了したならば、接着材9が硬化するまで待
ち、その後受光側ブロック8Bの周辺の所望の個所Pに
レーザー光を照射して、受光側ブロック8Bを取付台7
にレーザー溶接固定する。
When the position adjustment is completed, wait until the adhesive 9 hardens, and then irradiate a laser beam to a desired location P around the light-receiving block 8B to attach the light-receiving block 8B to the mounting base 7.
Fixed by laser welding.

このように、微小部分を加熱するレーザー溶接固定手段
であるので、部材の熱変形に起因する光ファイバレンズ
アセンブリ1の軸心のずれが生じないという利点がある
As described above, since the laser welding fixing means heats a minute portion, there is an advantage that the axis of the optical fiber lens assembly 1 does not shift due to thermal deformation of the member.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

しかしながら上記従来の固定方法では、受光側ブロック
8Bの底面には接着材の層が設けられているので、先に
レーザー溶接する側の接着剤9が除去されて取付台7側
に引張られ、光ファイバレンズアセンブリ1の軸心の方
向がずれて固定される恐れがある。
However, in the conventional fixing method described above, since an adhesive layer is provided on the bottom surface of the light-receiving block 8B, the adhesive 9 on the side to be laser welded is first removed and pulled toward the mounting base 7, causing the light to emit light. There is a possibility that the axis of the fiber lens assembly 1 may be fixed in a misaligned direction.

”また、取付台7の上面が比較的広いので、一様に平坦
に加工すことが困難である。したがって、ブロックの底
面の全面が取付台7の面に密接するとは限らない。即ち
、ブロックの底面の当接個所が部分的となり、調整作業
が困難であるという問題点がある。
"Also, since the top surface of the mount 7 is relatively wide, it is difficult to process it uniformly and flatly. Therefore, the entire bottom surface of the block is not necessarily in close contact with the surface of the mount 7. In other words, the block There is a problem in that the contact area on the bottom surface is only partial, making adjustment work difficult.

〔問題点を解決するための手段〕[Means for solving problems]

上記従来の問題点を解決するため本発明は、第1図の如
くに、円筒状の光ファイバレンズアセンブリ1をブロッ
ク10の軸心孔に挿入固定し、光ファイバレンズアセン
ブリ1の光軸を取付台7に固定された他の光学部品6の
光軸に位置合わせ調整後、ブロック10を取付台7に固
定するにあたり、ブロック10の底面の中央部に広幅の
溝11を設け、溝11内に接着剤9を挿入して、ブロッ
ク10を取付台7に仮固着し、その後、溝11の両側の
底面の周縁を、取付台7にレーザー溶接するようにした
ものである。
In order to solve the above-mentioned conventional problems, the present invention inserts and fixes a cylindrical optical fiber lens assembly 1 into an axial hole of a block 10, as shown in FIG. After adjusting the alignment with the optical axis of the other optical component 6 fixed to the stand 7, when fixing the block 10 to the mounting stand 7, a wide groove 11 is provided in the center of the bottom of the block 10, and a wide groove 11 is formed in the groove 11. The adhesive 9 is inserted to temporarily fix the block 10 to the mounting base 7, and then the peripheral edges of the bottom surface on both sides of the groove 11 are laser welded to the mounting base 7.

〔作用〕[Effect]

上記本発明の手段によれば、対向するそれぞれのブロッ
ク10の底面と、光ファイバレンズアセンブリlの軸心
までの高さは、等しいように機械加工されている。また
、ブロック10の底面は、溝11の両側の狭小の部分の
みで取付台に当接し、且つこの部分に接着剤層がない。
According to the above means of the present invention, the heights between the bottom surfaces of the opposing blocks 10 and the axis of the optical fiber lens assembly l are machined to be equal. Further, the bottom surface of the block 10 contacts the mounting base only at narrow portions on both sides of the groove 11, and there is no adhesive layer in these portions.

したがって、ブロック10を取付台7に載せるだけで光
軸と光ファイバレンズアセンブリ1の軸心の高さが一致
し、上下方向の調整を必要としない。
Therefore, simply by placing the block 10 on the mounting base 7, the optical axis and the axial center of the optical fiber lens assembly 1 are aligned in height, and no adjustment in the vertical direction is required.

また、ブロック10の底面の周縁をレーザー溶接しても
、調整位置が狂う恐れがない。
Further, even if the peripheral edge of the bottom surface of the block 10 is laser welded, there is no fear that the adjusted position will be deviated.

〔実施例〕〔Example〕

以下図示実施例により、本発明を具体的に説明する。な
お、全図を通じて同一符号は同一対象物を示す。
The present invention will be specifically explained below with reference to illustrated examples. Note that the same reference numerals indicate the same objects throughout the figures.

第1図は本発明の1実施例の斜視図であって、10は、
金属、例えばステンレス鋼が直方体状に形成されてなる
ブロックであって、底面に並行して軸心孔が穿設され、
この軸心孔に光ファイバレンズアセンブリ1が嵌入固着
されている。
FIG. 1 is a perspective view of one embodiment of the present invention, and 10 is a
A block made of metal, such as stainless steel, in the shape of a rectangular parallelepiped, with an axial hole bored in parallel to the bottom surface,
The optical fiber lens assembly 1 is fitted and fixed into this axial hole.

このブロック10は受光側ブロック、出射側ブロックが
、ともに同形状であって、底面12より光ファイバレン
ズアセンブリ1の軸心までの高さは等しく加工されてい
る。
In this block 10, the light-receiving side block and the light-emitting side block both have the same shape, and the height from the bottom surface 12 to the axis of the optical fiber lens assembly 1 is processed to be equal.

底面12の中央部には光ファイバレンズアセンブIJ 
1に並行した広幅の溝11を設け、溝11の両側に取付
台7の上面に当接する狭い幅の底面12を形成しである
At the center of the bottom surface 12 is an optical fiber lens assembly IJ.
A wide groove 11 parallel to the groove 1 is provided, and narrow bottom surfaces 12 are formed on both sides of the groove 11 to contact the top surface of the mounting base 7.

光ファイバレンズアセンブリ1を取付台7に固定するに
は、まず、溝11内に接着剤9を挿入し、出射側ブロッ
ク10を光学部品6に対向する位置に取付台7に載せて
仮接着した後に、底面12の周辺の所望の個所Pにレー
ザー光を照射して、取付台7にレーザー溶接固定する。
In order to fix the optical fiber lens assembly 1 to the mounting base 7, first, adhesive 9 was inserted into the groove 11, and the output side block 10 was placed on the mounting base 7 at a position facing the optical component 6 and temporarily bonded. Afterwards, a laser beam is irradiated onto a desired location P around the bottom surface 12 to fix it to the mounting base 7 by laser welding.

次に、受光側ブロック10の溝11内に接着剤9を挿入
し、出射側ブロック10とは光学部品6に対して反対側
の取付台7上に載せ、光ファイバ2の受光強度が最大に
なるように、この受光側ブロック10を取付台7上を摺
動させ、光軸と光ファイバレンズアセンブリlの軸心が
一致するように位置調整を行う。
Next, the adhesive 9 is inserted into the groove 11 of the light-receiving block 10, and the light-emitting block 10 is placed on the mounting base 7 on the opposite side of the optical component 6, so that the light receiving intensity of the optical fiber 2 is maximized. The light receiving side block 10 is slid on the mounting base 7, and the position is adjusted so that the optical axis and the axis of the optical fiber lens assembly l coincide with each other.

位置調整が終了したならば、接着材9が硬化するまで待
ち、その後底面12の周辺の所望の個所Pにレーザー光
を照射して、受光側ブロックlOを取付台7にレーザー
溶接固定する。
When the position adjustment is completed, wait until the adhesive 9 hardens, and then irradiate a desired location P around the bottom surface 12 with laser light to fix the light receiving block IO to the mounting base 7 by laser welding.

上述のように、対向するそれぞれのブロック10の底面
と、光ファイバレンズアセンブリ1の軸心までの高さは
、等しいように機械加工されており、また、それぞれの
底面12は、溝11の両側の狭小の部分のみで取付台に
当接し、且つこの部分に接着剤層がない。
As described above, the bottom surfaces of the opposing blocks 10 and the heights to the axis of the optical fiber lens assembly 1 are machined to be equal, and the bottom surfaces 12 of each block 10 are machined to have the same height on both sides of the groove 11. It contacts the mounting base only at a narrow part, and there is no adhesive layer in this part.

したがって、取付台7の上面の平坦度に多少の狂いがあ
っても、ブロック10を取付台7に載せるだけで光軸と
光ファイバレンズアセンブリ1の軸心の高さが一致し、
上下方向の調整を必要とせず、調整作業が容易である。
Therefore, even if there is some deviation in the flatness of the top surface of the mount 7, simply placing the block 10 on the mount 7 will align the optical axis with the axial center of the optical fiber lens assembly 1.
Adjustment work is easy as no adjustment is required in the vertical direction.

また、接着剤層が底面12にないことにより、底面12
の周縁をレーザー溶接しても、調整位置が狂う恐れがな
い。
Also, since the adhesive layer is not on the bottom surface 12, the bottom surface 12
There is no risk of the adjustment position going out of order even if the peripheral edge is laser welded.

なお、図示例は出射側光ファイバレンズアセンブリの軸
心方向に受光側光ファイバレンズアセンプI7が固定さ
れるものであるが、本発明は、出射側光ファイバレンズ
アセンブリの軸心に直交する方向の受光側光ファイバレ
ンズアセンブリに、適用できることはいうまでもない。
In the illustrated example, the receiving side optical fiber lens assembly I7 is fixed in the axial direction of the emitting side optical fiber lens assembly, but in the present invention, the receiving side optical fiber lens assembly I7 is fixed in the direction perpendicular to the axial center of the emitting side optical fiber lens assembly. Needless to say, the present invention can be applied to the light-receiving side optical fiber lens assembly.

〔発明の効果〕〔Effect of the invention〕

以上説明したように本発明は、取付台に当接するブロッ
クの底面が取付台に当接する部分を幅狭にし、且つこの
部分に接着剤層を設けないことにより、光ファイバレン
ズアセンブリの軸心と光軸との位置合わせ調整作業が容
易で、また、レーザ−溶接後の調整位置が狂う恐れがな
い等、実用上で優れた効果がある。
As explained above, the present invention makes the part where the bottom surface of the block that contacts the mounting base narrows in width and does not provide an adhesive layer in this part, thereby aligning the axis of the optical fiber lens assembly. It has excellent practical effects, such as easy alignment adjustment work with the optical axis and no risk of the adjusted position going out of order after laser welding.

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

第1図は本発明の1実施例の斜視図、 第2図は光ファイバレンズアセンブリの断面図第3図*
第fmは従来の固定方法を示す斜視図である。 図において、 1は光ファイバレンズアセンブリ、 2は光ファイバ、   3はフェルール、4はレンズ、
     5はアセンブリホルダ、6は光学部品、  
 7は取付台、 8八は出射側ブロック、8Bは受光側ブロック、9は接
着剤、     10はブロック、11は溝、    
  12は底面を示す。
Figure 1 is a perspective view of one embodiment of the present invention; Figure 2 is a cross-sectional view of an optical fiber lens assembly; Figure 3*
No. fm is a perspective view showing a conventional fixing method. In the figure, 1 is an optical fiber lens assembly, 2 is an optical fiber, 3 is a ferrule, 4 is a lens,
5 is an assembly holder, 6 is an optical component,
7 is the mounting base, 88 is the output side block, 8B is the light receiving side block, 9 is the adhesive, 10 is the block, 11 is the groove,
12 indicates the bottom surface.

Claims (1)

【特許請求の範囲】 円筒状の光ファイバレンズアセンブリ(1)をブロック
(10)の軸心孔に挿入固定し、該光ファイバレンズア
センブリ(1)の光軸を取付台(7)に固定された他の
光学部品(6)の光軸に位置合わせ調整後、該ブロック
(10)を該取付台(7)に固定するにあたり、 該ブロック(10)の底面の中央部に広幅の溝(11)
を設け、 該溝(11)内に接着剤(9)を挿入して、該ブロック
(10)を該取付台(7)に仮固着し、 その後、該ブロック(10)の底面の周縁を、該取付台
(7)にレーザー溶接することを特徴とする光ファイバ
レンズアセンブリの固定方法。
[Claims] A cylindrical optical fiber lens assembly (1) is inserted and fixed into an axial hole of a block (10), and the optical axis of the optical fiber lens assembly (1) is fixed to a mounting base (7). After adjusting the alignment with the optical axis of the other optical component (6), in order to fix the block (10) to the mounting base (7), a wide groove (11 )
The adhesive (9) is inserted into the groove (11) to temporarily fix the block (10) to the mounting base (7), and then the periphery of the bottom of the block (10) is A method for fixing an optical fiber lens assembly, comprising laser welding to the mounting base (7).
JP60108769A 1985-05-21 1985-05-21 Fixing method for optical fiber lens assembly Granted JPS61267011A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60108769A JPS61267011A (en) 1985-05-21 1985-05-21 Fixing method for optical fiber lens assembly

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60108769A JPS61267011A (en) 1985-05-21 1985-05-21 Fixing method for optical fiber lens assembly

Publications (2)

Publication Number Publication Date
JPS61267011A true JPS61267011A (en) 1986-11-26
JPS6325646B2 JPS6325646B2 (en) 1988-05-26

Family

ID=14493020

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60108769A Granted JPS61267011A (en) 1985-05-21 1985-05-21 Fixing method for optical fiber lens assembly

Country Status (1)

Country Link
JP (1) JPS61267011A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7201534B2 (en) * 2019-05-27 2023-01-10 ファナック株式会社 Actual measurement device and program

Also Published As

Publication number Publication date
JPS6325646B2 (en) 1988-05-26

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