JPH0943447A - Fusion splicing device for optical fibers - Google Patents

Fusion splicing device for optical fibers

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Publication number
JPH0943447A
JPH0943447A JP21096595A JP21096595A JPH0943447A JP H0943447 A JPH0943447 A JP H0943447A JP 21096595 A JP21096595 A JP 21096595A JP 21096595 A JP21096595 A JP 21096595A JP H0943447 A JPH0943447 A JP H0943447A
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JP
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Patent type
Prior art keywords
magnification
tv camera
optical fiber
low
high
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
JP21096595A
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Japanese (ja)
Other versions
JP3142751B2 (en )
Inventor
Yutaka Aihara
Manabu Kubota
Masahiko Mikawa
Hiroyuki Taya
正彦 三河
学 久保田
浩之 田谷
裕 粟飯原
Original Assignee
Fujikura Ltd
Nippon Telegr & Teleph Corp <Ntt>
日本電信電話株式会社
株式会社フジクラ
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
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Classifications

    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B6/00Light guides
    • G02B6/24Coupling light guides
    • G02B6/255Splicing of light guides, e.g. by fusion or bonding
    • G02B6/2555Alignment or adjustment devices for aligning prior to splicing
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B6/00Light guides
    • G02B6/24Coupling light guides
    • G02B6/255Splicing of light guides, e.g. by fusion or bonding
    • G02B6/2551Splicing of light guides, e.g. by fusion or bonding using thermal methods, e.g. fusion welding by arc discharge, laser beam, plasma torch

Abstract

PROBLEM TO BE SOLVED: To attain the optimum combination of time and the accuracy of a measured value by changing over the observation at the time of fusion splicing of optical fibers by TV cameras to a high magnification and low magnification at need with a simple mechanism. SOLUTION: The two cameras; the TV camera 41 for the low magnification and the TV camera 42 for the high magnification are used. These cameras are so constituted that the light emitted from an objective lens 30 and transmitted through a half mirror 60 enters the TV camera 41 for the low magnification and that the light reflected by the half mirror 60 is reflected again by the mirror 62 and enters the TV camera 42 for the high magnification through the longer optical path. The optical fiber image larger than the optical fiber image of the TV camera 41 for the low magnification is obtd with the TV camera 42 for the high magnification. The simultaneous observation of all the optical fibers 20 with the TV camera 41 for the low magnification and the macroobservation of only one piece of the optical fiber with the TV camera 42 for the high magnification are made possible by changing over the output of both TV cameras 41, 42 at need.

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【産業上の利用分野】この発明は、光ファイバの融着接続装置に関し、特に多心の光ファイバの融着接続装置に関し、特に、その中の対物レンズとTVカメラを用いて光ファイバ観察する部分に関するものである。 BACKGROUND OF THE INVENTION This invention relates to a fusion splicing apparatus of the optical fiber, relates fusion splicing apparatus, especially multi-core optical fiber, in particular, to observe the optical fiber by using an objective lens and TV camera therein it relates to the part.

【0002】 [0002]

【従来の技術】図3に、従来の光ファイバ観察手段の一例を、模型的に示した。 BACKGROUND ART FIG. 3, an example of a conventional optical fiber observation means and models shown and. 20は光ファイバ、30は対物レンズ、40はTVカメラ、50はTVモニタで、52 20 denotes an optical fiber, 30 denotes an objective lens, 40 is a TV camera, 50 a TV monitor, 52
はその画面である。 It is its screen.

【0003】光ファイバ20を融着接続する場合、次の各ステップの観察を行う。 [0003] When the optical fiber 20 connected by fusion splicing, to observe the following steps. 図4は、各ステップのモニタ画面52を示す。 Figure 4 shows a monitor screen 52 of each step. なお図4における光ファイバ20は、 Note optical fiber 20 in FIG. 4,
正確に言えば光ファイバの像であるが、説明が煩雑になるので、単に光ファイバと言うことにする。 Although an image of the optical fiber to be exact, since description becomes complicated, simply to be referred to as an optical fiber.

【0004】光ファイバ端面間隔をセットするステップ(同図(a))。 [0004] step of setting an optical fiber end face spacing (FIG. (A)). 対向する各光ファイバ20の間隔d 1 〜d 4を測定しながら前進させ、所定の値になったら止める。 The distance d 1 to d 4 of each optical fiber 20 facing advancing while measuring, Stop reaches a predetermined value. 接続損失を推定するステップ(同図(b))。 Estimating a splice loss (FIG. (B)). 各光ファイバ20の軸ズレx 1 〜x 4を測定し、それらの値から接続損失を推定する。 The axial misalignment x 1 ~x 4 of each optical fiber 20 is measured to estimate the connection loss from those values. 必要に応じて軸ズレがゼロになるように、光ファイバを動かす。 As axial displacement becomes zero as necessary to move the optical fiber. 光ファイバを放電の熱で溶かして接続するステップ(同図(c))。 Step of connecting by dissolving optical fiber discharge heat (FIG (c)). 54はアーク放電の像である。 54 is an image of the arc discharge. 接続損失を評価するステップ(同図(d))。 Evaluating the connection loss (FIG. (D)). 融着後の光ファイバを画像処理し、損失を算出する。 The optical fiber after fusion and image processing, to calculate the loss.

【0005】従来の多心用の装置は、上記ステップの何れについても、低い倍率の対物レンズ30を用いて、光ファイバ20を観察していた。 [0005] device for a conventional multi-fiber, for any of the above steps also using objective lens 30 of a low magnification, was observed optical fiber 20. この方式は、全ての光ファイバを1度に観察できるので、時間がかからないというメリットがあるが、低い倍率なので、測定値の精度が悪いというデメリットもある。 This method, it is possible to observe all of the optical fiber at a time, there is a merit that less time consuming, since a low magnification, there is also a disadvantage of poor accuracy of the measurements.

【0006】また、測定値の精度を上げるために、モニタ画面52に光ファイバ20が1本見える程度の高倍率の対物レンズ30を使用する方法もある。 Further, in order to increase the accuracy of the measurements, there is a method of using a high magnification objective lens 30 to the extent that the optical fiber 20 on the monitor screen 52 is visible one. しかし、この方法をとると、光ファイバ20の本数分だけTVカメラ40を移動させて観察を繰り返すため、時間がかかる。 However, when taking this method, to repeat the observation by moving the number amount corresponding TV camera 40 of the optical fiber 20, it takes time.

【0007】 [0007]

【発明が解決しようとする課題】上記融着接続ステップのうち、 ・はそれほど測定値の精度は必要としないし、も低倍率でよい。 Of the above fusion splicing step [0005], - it is to not less accurate measurements needed may also low magnification. ・しかし、,は測定値の精度は高い方が良い。 · However ,, the accuracy of the measurement value is higher is better. 必要に応じて高倍率にしたり低倍率にしたりできれば、 If or the low magnification or a high magnification as required,
時間、測定値精度の最適組合せができる。 Time, it is best combination of measurement accuracy. しかし、顕微鏡のように、光ファイバ20近くに複数のレンズを配置することは困難である。 However, as the microscope, it is difficult to arrange a plurality of lenses near the optical fiber 20.

【0008】 [0008]

【課題を解決するための手段】図1に例示するように、 ・低倍率用TVカメラ41と高倍率用TVカメラ42の2つを用いる。 As illustrated in FIG. 1 [SUMMARY OF], and - low-magnification TV camera 41 using two high-magnification TV camera 42. ・対物レンズ30と低倍率用TVカメラ41との間にハーフミラー60を置く。 - an objective lens 30 placed through the half mirror 60 between the low-magnification TV camera 41. ・そして、ハーフミラー60を透過した光が低倍率用T · The light transmitted through the half mirror 60 is a low magnification for T
Vカメラ41に入り、ハーフミラー60を反射した光が高倍率用TVカメラ42に入るようにする。 It enters the V camera 41, so that light reflected by the half mirror 60 enters a high-magnification TV camera 42. ・また、対物レンズ30から高倍率用TVカメラ42までの距離が、対物レンズ30から低倍率用TVカメラ4 - The distance from the objective lens 30 to a high-magnification TV camera 42, a TV camera 4 for low magnification from the objective lens 30
1までの距離より長くなるようにする。 To be longer than the distance of up to 1. なお、低倍率用TVカメラ41と高倍率用TVカメラ4 Incidentally, the low-magnification TV camera 41 high-magnification TV camera 4
2の位置を入れ替えてもよい。 It may be replaced with a second position.

【0009】 [0009]

【作 用】低倍率用TVカメラ41よりも高倍率用TV [For work] TV high-magnification than the low-magnification TV camera 41
カメラ42の方が、対物レンズ30までの距離が長いので、光ファイバ20の像が大きく映る。 Towards the camera 42, the distance to the objective lens 30 is long, an image of the optical fiber 20 is reflected significantly. 対物レンズ30 The objective lens 30
から低倍率用TVカメラ41までの距離と、対物レンズ30から高倍率用TVカメラ42までの距離を適当に選ぶことにより、低倍率用TVカメラ41で全ての光ファイバ20を同時に観察し、高倍率用TVカメラ42では1本の光ファイバ20だけを拡大して観察する、という具合いにすることができる。 From the distance to the low-magnification TV camera 41, by appropriately selecting the distance from the objective lens 30 to a high-magnification TV camera 42 to observe all the optical fiber 20 at the same time with a low-magnification TV camera 41, a high observing an enlarged by a factor for the TV camera 42, one optical fiber 20 can be so on.

【0010】 [0010]

【実施例】図1において、41は低倍率用のTVカメラ、42は高倍率用のTVカメラである。 EXAMPLES In FIG. 1, 41 low-magnification of the TV camera, 42 is a TV camera for high magnification. ただし、これらは用途が違うだけであり、同じ仕様のものを用いてよい。 However, these are only the application is different, may be used of the same specification. 対物レンズ30と低倍率用TVカメラ41との間にハーフミラー60を置き、対物レンズ30からの光がハーフミラー60を通って低倍率用TVカメラ41に入るようにする。 Place the half mirror 60 between the objective lens 30 and the low-magnification TV camera 41, so that the light from the objective lens 30 enters through the half mirror 60 to the low-magnification TV camera 41. また、ミラー62を設け、ハーフミラー6 Furthermore, the provided mirror 62, the half mirror 6
0で反射した光が、もう1度、ミラー62で反射して高倍率用TVカメラ42に入るようにする。 Light reflected by zero, again, so that reflected by the mirror 62 enters the high-magnification TV camera 42.

【0011】低倍率用TVカメラ41による画像倍率は、約5倍にしてある。 [0011] Image magnification of a low-magnification TV camera 41, are the approximately 5-fold. また、対物レンズ30〜高倍率用TVカメラ42の距離(A 1 +A 3 +A 4 )を、対物レンズ30〜低倍率用TVカメラ41の距離(A 1 +A 2 The distance of the objective lens 30 to high-magnification TV camera 42 (A 1 + A 3 + A 4), the distance of the objective lens 30 to a low-magnification TV camera 41 (A 1 + A 2)
の約4倍になるようにして、高倍率用TVカメラ42による画像倍率が、約20倍になるようにしている。 And approximately 4-fold to become like, the image magnification of the high magnification for TV camera 42 is set to be about 20-fold. 低倍率用TVカメラ41と高倍率用TVカメラ42の出力は切換器64で切り換える。 A low-magnification TV camera 41 outputs a high-magnification TV camera 42 is switched switcher 64.

【0012】そして、上記の段落[0004]で述べた、の端面間隔セットのステップと、の放電融着のステップのときは、低倍率用TVカメラ41を使って低倍率で観察する(図1(a))。 [0012] Then, as described in the above paragraph [0004], when in the step of the end face spacing sets, the discharge fusing step, using a low-magnification TV camera 41 is observed at low magnification (Figure 1 (a)). また、の接続損失を推定するステップと、接続損失を評価するステップのときは、高倍率用TVカメラ42を使って1本の光ファイバ20を観察できる程度の高倍率にする(図1 Also, estimating a splice loss of, when the step of evaluating the splice loss and the high magnification of a degree that can be observed a single optical fiber 20 with a high magnification for TV camera 42 (Fig. 1
(b))。 (B)). なおこのとき、高倍率用TVカメラ42を矢印44の方向に変位させて、全ての光ファイバ20を1 At this time, the high-magnification TV camera 42 is displaced in the direction of arrow 44, all of the optical fibers 20 1
本ずつ観察できるようにする。 To allow observation by this. なお、TVカメラ42を変位せずに、ミラー62を回転させることにより、光ファイバの観察位置をずらすこともできる。 Incidentally, without displacing the TV camera 42, by rotating the mirror 62, it is also possible to shift the viewing position of the optical fiber.

【0013】なお、ミラー62を使わずに、図2のようにすることもできる。 [0013] Note that without using the mirror 62, may be as shown in Figure 2.

【0014】 [0014]

【発明の効果】 【Effect of the invention】

(1)簡単に倍率切換えができるので、必要な場合のみ倍率を高くして測定値の精度を上げることができる。 (1) Since it is easily magnification switching, it can improve the accuracy of measurements by high magnification only when necessary. (2)倍率切換えにレンズを1つしか使わないので、レンズを切り換える機構が不要である。 (2) Since it uses only one lens magnification switching mechanism for switching the lens is not required.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】本発明の実施例の説明図。 Figure 1 is an explanatory diagram of an embodiment of the present invention.

【図2】本発明の他の実施例の説明図。 FIG. 2 is an explanatory diagram of another embodiment of the present invention.

【図3】従来の光ファイバ観察手段の一例の模型的説明図。 [Figure 3] An example model explanatory view of a conventional optical fiber observation means.

【図4】光ファイバの融着接続に際して観察する各ステップのモニタ画面の説明図。 Figure 4 is an explanatory view of a monitor screen of each step of observing during fusion splicing of the optical fibers.

【符号の説明】 DESCRIPTION OF SYMBOLS

20 光ファイバ 30 対物レンズ 40 TVカメラ 41 低倍率用TVカメラ 42 高倍率用TVカメラ 50 TVモニタ 52 モニタ画面 60 ハーフミラー 62 ミラー 64 切換器 20 optical fiber 30 objective lens 40 TV camera 41 low-magnification TV camera 42 high-magnification TV camera 50 TV monitor 52 monitor screen 60 a half mirror 62 mirror 64 switcher

───────────────────────────────────────────────────── フロントページの続き (72)発明者 久保田 学 東京都千代田区内幸町一丁目1番6号 日 本電信電話株式会社内 (72)発明者 三河 正彦 東京都千代田区内幸町一丁目1番6号 日 本電信電話株式会社内 ────────────────────────────────────────────────── ─── of the front page continued (72) inventor Manabu Kubota, Chiyoda-ku, tokyo Uchisaiwaicho chome No. 1 No. 6 Date. this telegraph and telephone within Co., Ltd. (72) inventor Masahiko Mikawa, Chiyoda-ku, tokyo Uchisaiwaicho chome No. 1 No. 6 Japan telegraph and telephone in the Corporation

Claims (1)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 対物レンズとTVカメラとを含む光ファイバ観察手段を有する、光ファイバの融着接続装置において、前記光ファイバ観察手段のTVカメラとして、低倍率用と高倍率用が設けられ、当該低倍率用または高倍率用TVカメラと前記対物レンズの間にハーフミラーが置かれて、当該ハーフミラーを透過した光が前記低倍率用または高倍率用TVカメラのどちらか一方に入り、また当該ハーフミラーを反射した光が前記低倍率用または高倍率用TVカメラの他方に入るようにしてあり、かつ前記対物レンズから前記高倍率用TVカメラまでの距離が、前記対物レンズーから前記低倍率用TVカメラまでの距離より長くしてある、光ファイバの融着接続装置。 [Claim 1] with an optical fiber observing means including an objective lens and TV camera, the fusion splicing apparatus of the optical fiber, as a TV camera of the optical fiber observation means, the low-magnification and high-magnification is provided, wherein with the low-magnification or high magnification for TV camera half mirror is placed between the objective lens, the light transmitted through the half mirror enters to either of the low-magnification or high magnification for TV cameras, also distance Yes as light reflected the half mirror enters the other of the low-magnification or high magnification for TV cameras, and from the objective lens to the high-magnification TV camera, said from the objective Renzu low magnification It is longer than the distance to use TV camera, fusion splicing apparatus for an optical fiber.
JP21096595A 1995-07-27 1995-07-27 Fusion splicing apparatus for an optical fiber Expired - Fee Related JP3142751B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21096595A JP3142751B2 (en) 1995-07-27 1995-07-27 Fusion splicing apparatus for an optical fiber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21096595A JP3142751B2 (en) 1995-07-27 1995-07-27 Fusion splicing apparatus for an optical fiber

Publications (2)

Publication Number Publication Date
JPH0943447A true true JPH0943447A (en) 1997-02-14
JP3142751B2 JP3142751B2 (en) 2001-03-07

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Family Applications (1)

Application Number Title Priority Date Filing Date
JP21096595A Expired - Fee Related JP3142751B2 (en) 1995-07-27 1995-07-27 Fusion splicing apparatus for an optical fiber

Country Status (1)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0803721A2 (en) * 1996-04-23 1997-10-29 Sumitomo Electric Industries, Ltd. Method and apparatus for observing tip portion of optical fibers butting each other
EP0984259A1 (en) * 1998-03-18 2000-03-08 The Furukawa Electric Co., Ltd. Image processor for observing optical fiber
US6287020B1 (en) 1997-10-15 2001-09-11 Sumitomo Electric Industries, Ltd. Observation apparatus and fusion splicer for optical fibers

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0803721A2 (en) * 1996-04-23 1997-10-29 Sumitomo Electric Industries, Ltd. Method and apparatus for observing tip portion of optical fibers butting each other
EP0803721A3 (en) * 1996-04-23 1999-01-07 Sumitomo Electric Industries, Ltd. Method and apparatus for observing tip portion of optical fibers butting each other
US6034718A (en) * 1996-04-23 2000-03-07 Sumitomo Electric Industries, Ltd. Method and apparatus for observing tip portion of optical fibers butting each other
US6287020B1 (en) 1997-10-15 2001-09-11 Sumitomo Electric Industries, Ltd. Observation apparatus and fusion splicer for optical fibers
EP0984259A1 (en) * 1998-03-18 2000-03-08 The Furukawa Electric Co., Ltd. Image processor for observing optical fiber
EP0984259B1 (en) * 1998-03-18 2007-11-21 The Furukawa Electric Co., Ltd. Image processor for observing optical fiber

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