JP2741452B2 - Measurement method of optical fiber structure - Google Patents
Measurement method of optical fiber structureInfo
- Publication number
- JP2741452B2 JP2741452B2 JP11091092A JP11091092A JP2741452B2 JP 2741452 B2 JP2741452 B2 JP 2741452B2 JP 11091092 A JP11091092 A JP 11091092A JP 11091092 A JP11091092 A JP 11091092A JP 2741452 B2 JP2741452 B2 JP 2741452B2
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- coating
- distance
- maximum value
- outer 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 - Fee Related
Links
Landscapes
- Testing Of Optical Devices Or Fibers (AREA)
- Light Guides In General And Applications Therefor (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、光ファイバ素線の構造
の測定方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for measuring the structure of an optical fiber.
【０００２】[0002]
【従来の技術およびその問題点】光ファイバの外径、
非円率、偏心量、曲がり、並びに被覆部分の外
径、偏肉、の各構造パラメータは、従来、次のように
して測定していた。2. Description of the Related Art The outer diameter of an optical fiber,
Conventionally, the structural parameters such as non-circularity, eccentricity, bending, and outer diameter and thickness deviation of the coating portion have been measured as follows.
【０００３】（１）光ファイバ外径、非円率、偏
心量については、図２のように、光ファイバ１４の端面
をＴＶカメラ２４により観察し、観察結果を画像処理し
て、次のように求める。なお、２６は画像処理装置、２
８はコンピュータである。 光ファイバ１４の外径ａの平均値を求める。これが光
ファイバ外径である。 光ファイバ１４の外径ａの （最大値−最小値）／平均値ｘ100％ を求める。これが光ファイバの非円率である。 一つの直径上における、コア１６の両側のクラッド１
８の厚みの差（ｂ−ｃ）の最高値を求める。これが光フ
ァイバの偏心量である。(1) Regarding the optical fiber outer diameter, non-circularity, and eccentricity, as shown in FIG. 2, the end face of the optical fiber 14 is observed with a TV camera 24, and the observation result is image-processed as follows. Ask for. 26 is an image processing device, 2
8 is a computer. An average value of the outer diameter a of the optical fiber 14 is obtained. This is the optical fiber outer diameter. (Maximum value−minimum value) / average value × 100% of the outer diameter a of the optical fiber 14 is obtained. This is the non-circularity of the optical fiber. Cladding 1 on both sides of core 16 on one diameter
The highest value of the thickness difference (bc) of No. 8 is obtained. This is the amount of eccentricity of the optical fiber.
【０００４】（２）光ファイバの曲がりについては、
図３のように、光ファイバ心線１０の被覆１２を除去し
た後、光ファイバ１４を側面から観察し、その観察結果
を画像処理して求める。すなわち、光ファイバ１４の側
面のある２点Ａ，Ｂを結ぶ直線の中間点Ｃとファイバ側
面との距離ｄを求る。これが光ファイバの曲がり量であ
る。(2) Regarding the bending of the optical fiber,
As shown in FIG. 3, after the coating 12 of the optical fiber core 10 is removed, the optical fiber 14 is observed from the side, and the observation result is obtained by image processing. That is, the distance d between the midpoint C of the straight line connecting the two points A and B on the side of the optical fiber 14 and the side of the fiber is determined. This is the bending amount of the optical fiber.
【０００５】（３）光ファイバ被覆の外径、偏肉に
ついては、融着接続におけるコア直視法と同様に、図４
のように、ＴＶカメラ２４により光ファイバ心線１０を
側面から観察しながら一回転させ、その観察結果を画像
処理して求める。すなわち、 被覆１２の外径ｅの平均値を求める。これが被覆外径
である。 被覆１２の厚さｆ，ｇの差（ｆ−ｇ）を求め、光ファ
イバを１回転する間のこの差の最大値を偏肉とする。(3) Regarding the outer diameter and uneven thickness of the optical fiber coating, as in the case of the core direct view method in fusion splicing, FIG.
As described above, the optical fiber core wire 10 is rotated once while observing it from the side by the TV camera 24, and the observation result is obtained by image processing. That is, the average value of the outer diameter e of the coating 12 is obtained. This is the coating outer diameter. The difference (f−g) between the thicknesses f and g of the coating 12 is determined, and the maximum value of the difference during one rotation of the optical fiber is regarded as uneven thickness.
【０００６】[0006]
【発明が解決しようとする課題】上記のように従来の方
法では、３種の測定装置が必要であり、全項目の検査を
行うと、３回のセッティングが必要であり、検査時間が
長くなるという欠点を有していた。本発明は、上記問題
点を解消するためになされたものであって、検査時間の
短縮を目的としている。As described above, in the conventional method, three types of measuring devices are required, and when all the items are inspected, three settings are required, and the inspection time becomes long. Had the disadvantage that The present invention has been made to solve the above problems, and has as its object to shorten the inspection time.
【０００７】[0007]
【課題を解決するための手段】図１のように、端部の被
覆１２を除去して光ファイバ１４を露出した光ファイバ
心線１０を、中心軸の回りに１回転させなる。それを、
側面から、ＴＶカメラ２４により、光ファイバ心線の被
覆１２を除去した部分としない部分を、同時に、同一画
面上で観察する。そして、観察結果を画像処理して、１
回転する間における次の各値を求める。As shown in FIG. 1, the optical fiber core wire 10 from which the coating 12 at the end is removed to expose the optical fiber 14 is rotated once around the central axis. That,
From the side, the portion where the coating 12 of the optical fiber core is removed and the portion where the coating 12 is not removed are simultaneously observed on the same screen by the TV camera 24. Then, image processing is performed on the observation result, and 1
The following values during rotation are obtained.
【０００８】（ア）光ファイバ１４の両側面１５間の距
離ａの平均値と最大値と最小値。 （イ）光ファイバコア１６の両側における当該コア１６
と光ファイバの側面１５との間の距離の差（ｂ−ｃ）の
最大値。 （ウ）光ファイバ側面１５の任意の２点Ａ，Ｂを結ぶ直
線の中間点Ｃと光ファイバ側面１５との距離ｄの最大
値。 （エ）被覆部分１２の両側面１３間の距離ｅの平均値。 （オ）光ファイバ１４の両側における当該光ファイバ１
４と被覆の側面１３との間の距離の差（ｆ−ｇ）の最大
値。(A) Average value, maximum value and minimum value of the distance a between both side surfaces 15 of the optical fiber 14. (A) The cores 16 on both sides of the optical fiber core 16
Maximum value of the difference (bc) in the distance between the optical fiber and the side surface 15 of the optical fiber. (C) The maximum value of the distance d between the midpoint C of the straight line connecting any two points A and B on the optical fiber side surface 15 and the optical fiber side surface 15. (D) Average value of distance e between both side surfaces 13 of covering portion 12. (E) The optical fiber 1 on both sides of the optical fiber 14
The maximum value of the difference (fg) in the distance between 4 and the side surface 13 of the coating.
【０００９】[0009]
【作 用】（１）側面から、ＴＶカメラ２４により、光
ファイバ心線の被覆を除去した部分としない部分を、同
時に、同一画面上で観察し、観察結果を画像処理するこ
とにより、１回のセットで、始めに述べた項目が全て測
定出来る。 （２）光ファイバを中心軸の回りに１回転させることに
より、平均値と最大値と最小値が測定される。[Operation] (1) From the side, the portion where the coating of the optical fiber is removed and the portion which is not covered are simultaneously observed on the same screen by the TV camera 24, and the observation result is image-processed once. With this set, all the items mentioned at the beginning can be measured. (2) The average value, the maximum value, and the minimum value are measured by rotating the optical fiber once around the central axis.
【００１０】[0010]
【実施例】第１図に、測定系の概略構成を示した。２０
は回転機構で、緩速度で１回転して停止できるようにな
っている。チャック２２で光ファイバ心線１０の一端を
把持し、光ファイバ心線１０を中心軸の回りに１回転さ
せる。光ファイバ心線１０は、端部の被覆１２を除去し
て、光ファイバ１４を露出させておく。上記のように、
側面から、ＴＶカメラ２４により、光ファイバ心線１０
の被覆１２を除去した部分（光ファイバ１４）としない
部分を、同時に、同一画面上で観察する。FIG. 1 shows a schematic configuration of a measuring system. 20
Is a rotation mechanism, which is capable of stopping at one rotation at a slow speed. One end of the optical fiber core 10 is gripped by the chuck 22, and the optical fiber core 10 is rotated once around the central axis. The optical fiber core 10 has the end coating 12 removed to expose the optical fiber 14. as mentioned above,
From the side, the optical fiber core 10 is
The portion (optical fiber 14) from which the coating 12 has been removed and the portion that is not are simultaneously observed on the same screen.
【００１１】構造の各項目は、次のようにして求める。 光ファイバ径：光ファイバ１４の側面１５間の距離ａ
を測定し、光ファイバを１回転する間の平均値をファイ
バ外径とする。 光ファイバの非円率：上記光ファイバ１４の外径ａの
１回転の間の最大値、最小値を求め、次式により算出す
る。 非円率＝（最大値−最小値）／平均値ｘ１００（％） 偏心量：コア１６と、光ファイバ１４の側面１５との
距離をそれぞれクラッド厚ｂ、ｃとし、両者の差（ｂ−
ｃ）を求め、光ファイバを１回転する間のこの値の最大
値を偏心量とする。 曲がり量：光ファイバ１４の側面の任意の２点Ａ，Ｂ
を結ぶ直線の中間点Ｃと側面１５との距離ｄを求め、フ
ァイバを１回転する間の最大値を曲がり量とする。Each item of the structure is obtained as follows. Optical fiber diameter: distance a between side surfaces 15 of optical fiber 14
Is measured, and the average value during one rotation of the optical fiber is defined as the fiber outer diameter. Non-circularity of the optical fiber: The maximum value and the minimum value during one rotation of the outer diameter a of the optical fiber 14 are obtained, and calculated by the following equation. Non-circularity = (maximum value−minimum value) / average value × 100 (%) Eccentricity: The distance between the core 16 and the side surface 15 of the optical fiber 14 is defined as cladding thicknesses b and c, respectively, and the difference (b−
c) is determined, and the maximum value of this value during one rotation of the optical fiber is defined as the amount of eccentricity. Bending amount: arbitrary two points A and B on the side of optical fiber 14
The distance d between the midpoint C of the straight line connecting the two and the side surface 15 is determined, and the maximum value during one rotation of the fiber is defined as the amount of bending.
【００１２】被覆外径：被覆１２の側面１３間の距離
ｅを求め、ファイバを１回転する間の平均値を被覆外径
とする。 偏肉：光ファイバ１４の側面１５と、被覆側面１３の
距離をそれぞれ被覆厚ｆ，ｇとし、両者の差（ｆ−ｇ）
を求め、光ファイバを１回転する間のこの差の最大値を
偏肉とする。Coating outer diameter: The distance e between the side surfaces 13 of the coating 12 is determined, and the average value during one rotation of the fiber is defined as the coating outer diameter. Uneven thickness: The distance between the side surface 15 of the optical fiber 14 and the coating side surface 13 is defined as the coating thickness f and g, respectively, and the difference (f−g) between the two.
Is determined, and the maximum value of this difference during one rotation of the optical fiber is defined as uneven thickness.
【００１３】[0013]
【発明の効果】端部の被覆を除去して光ファイバを露出
した光ファイバ心線を、中心軸の回りに１回転させなが
ら、側面から、ＴＶカメラにより、光ファイバ心線の被
覆を除去した部分としない部分を、同時に、同一画面上
で観察し、観察結果を画像処理して、１回転する間にお
ける、上記の各値を求めるようにするので、多項目の同
時測定が可能となり、検査時間の大幅な短縮が可能とな
る。According to the present invention, the coating of the optical fiber core is removed from the side surface by a TV camera while the optical fiber core with the end coating removed to expose the optical fiber is rotated once around the central axis. The part and the non-part are simultaneously observed on the same screen, the observation result is image-processed, and the above-mentioned values are obtained during one rotation, so that multiple items can be measured at the same time. The time can be significantly reduced.
【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。FIG. 1 is an explanatory diagram of an embodiment of the present invention.
【図２】従来の光ファイバ外径、同非円率および同偏心
量の測定方法の説明図。FIG. 2 is an explanatory view of a conventional method for measuring the outer diameter, non-circularity, and eccentricity of an optical fiber.
【図３】従来の光ファイバの曲がりの測定方法の説明
図。FIG. 3 is an explanatory view of a conventional method for measuring the bending of an optical fiber.
【図４】従来の被覆の外径および同偏肉の測定方法の説
明図。FIG. 4 is an explanatory view of a conventional method for measuring the outer diameter and uneven thickness of a coating.
１０ 光ファイバ心線 １２ 被覆 １３，被覆側面 １４ 光ファイバ １５ 光ファイバ側面 １６ コア １８ クラッド ２０ 回転機構 ２２ チャック ２４ ＴＶカメラ ２６ 画像処理装置 ２８ コンピュータ DESCRIPTION OF SYMBOLS 10 Optical fiber core wire 12 Coating 13, Coating side surface 14 Optical fiber 15 Optical fiber side surface 16 Core 18 Clad 20 Rotation mechanism 22 Chuck 24 TV camera 26 Image processing device 28 Computer
Claims (1)
した光ファイバ心線を、中心軸の回りに１回転させなが
ら、側面から、ＴＶカメラにより、光ファイバ心線の被
覆を除去した部分としない部分を、同時に、同一画面上
で観察し、観察結果を画像処理して、１回転する間にお
ける、（ア）光ファイバの両側面間の距離ａの平均値と
最大値と最小値、（イ）光ファイバコアの両側における
当該コアと光ファイバの側面との間の距離の差（ｂ−
ｃ）の最大値、（ウ）光ファイバ側面の任意の２点を結
ぶ直線の中間点と光ファイバ側面との距離ｄの最大値、
（エ）被覆部分の両側面間の距離ｅの平均値、（オ）光
ファイバの両側における当該光ファイバと被覆の側面と
の間の距離の差（ｆ−ｇ）の最大値、を求める、光ファ
イバの構造の測定方法。1. An optical fiber core wire from which an end portion is removed to expose an optical fiber is rotated once around a central axis, and the optical fiber core wire is removed from a side by a TV camera. The non-portion and the non-portion are simultaneously observed on the same screen, and the observation result is image-processed. (A) The average value, maximum value, and minimum value of the distance a between both side surfaces of the optical fiber during one rotation (A) the difference in the distance between the side of the optical fiber and the side of the optical fiber (b-
c) the maximum value; c) the maximum value of the distance d between the midpoint of the straight line connecting any two points on the side of the optical fiber and the side of the optical fiber;
(D) calculating an average value of a distance e between both side surfaces of the coating portion, and (e) a maximum value of a difference (f−g) of a distance between the optical fiber and the side surface of the coating on both sides of the optical fiber. A method for measuring the structure of an optical fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11091092A JP2741452B2 (en) | 1992-04-03 | 1992-04-03 | Measurement method of optical fiber structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11091092A JP2741452B2 (en) | 1992-04-03 | 1992-04-03 | Measurement method of optical fiber structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05281086A JPH05281086A (en) | 1993-10-29 |
| JP2741452B2 true JP2741452B2 (en) | 1998-04-15 |
Family
ID=14547747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11091092A Expired - Fee Related JP2741452B2 (en) | 1992-04-03 | 1992-04-03 | Measurement method of optical fiber structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2741452B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5797977B2 (en) * | 2011-08-29 | 2015-10-21 | 東日本電信電話株式会社 | Optical fiber tip inspection equipment |
-
1992
- 1992-04-03 JP JP11091092A patent/JP2741452B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05281086A (en) | 1993-10-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |