JPH03259730A - Optical fiber sensor - Google Patents
Optical fiber sensorInfo
- Publication number
- JPH03259730A JPH03259730A JP5872290A JP5872290A JPH03259730A JP H03259730 A JPH03259730 A JP H03259730A JP 5872290 A JP5872290 A JP 5872290A JP 5872290 A JP5872290 A JP 5872290A JP H03259730 A JPH03259730 A JP H03259730A
- Authority
- JP
- Japan
- Prior art keywords
- light
- optical fiber
- specimen
- light source
- passes
- 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.)
- Pending
Links
- 239000013307 optical fiber Substances 0.000 title claims abstract description 59
- 239000000835 fiber Substances 0.000 claims abstract description 13
- 230000003287 optical effect Effects 0.000 claims description 8
- 238000005259 measurement Methods 0.000 description 7
- 238000004458 analytical method Methods 0.000 description 6
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000001139 pH measurement Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 238000007738 vacuum evaporation Methods 0.000 description 1
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は光フアイバセンサに関する。[Detailed description of the invention] [Industrial application field] FIELD OF THE INVENTION The present invention relates to fiber optic sensors.
この種のセンサはカラー分析、成分分析、ＰＨ測測定温
度測定、変位測定等に使用される。This type of sensor is used for color analysis, component analysis, PH measurement, temperature measurement, displacement measurement, etc.
［従来の技術］
３、発明の詳細な説明
［目次］
産業上の利用分野
従来の技術
発明が解決しようとする課題
第５図には従来例が示されており、光源ランプ１０から
発した光は集光レンズ１２で集光され、ソケット１４を
介して光ファイバ４２へ送られる。[Prior Art] 3. Detailed Description of the Invention [Table of Contents] Industrial Application Fields Conventional Technology Problems to be Solved by the Invention A conventional example is shown in FIG. is condensed by a condensing lens 12 and sent to an optical fiber 42 via a socket 14.
光ファイバ４２を通過した光はその先端より検体へ照射
される。The light that has passed through the optical fiber 42 is irradiated onto the specimen from its tip.
そして、その反射光は光ファイバ４４を経由してソケッ
ト２２へ送ら札 集光レンズ２４で集光されて受光素子
２６へ伝播される。Then, the reflected light is sent to the socket 22 via the optical fiber 44, collected by the condenser lens 24, and propagated to the light receiving element 26.
受光素子２６では反射光の光信号が電気信号へ変換され
る。The light receiving element 26 converts the optical signal of the reflected light into an electrical signal.
ところ力ζ 以」−の従来例においては、第５図、第６
図に示されるように発光用と受光用の２本の光ファイバ
４２．４４が必要となり、双方の軸心のずれが太き〜１
ので、検体に照射される発光スポットとその反射光を受
ける受光スポットとが異なり、このため、正確な分析、
測定を行なうことが困難であった
そこで、第７図に示されるように発光用の光ファイバ４
２先端部と受光用の光ファイバ４４先端部とを、検体３
２に対してその入射角と反射角が同一となるように配置
する必要があツタ［発明が解決しようとする課題］
しかしながら、上記従来例では光ファイバ４２゜４４を
検体３２に対し同一角度で配置することが難しく、その
配置角度も検体８２の大きさ、種類などによって異なる
ので、操作性が良好ではなかった。In the conventional example of the force ζ
As shown in the figure, two optical fibers 42 and 44 are required, one for light emission and one for light reception, and the deviation of the axes of both is ~1
Therefore, the light emitting spot that irradiates the sample and the light receiving spot that receives the reflected light are different, which makes it difficult to perform accurate analysis.
Since it was difficult to carry out measurements, we installed an optical fiber 4 for light emission as shown in Fig. 7.
2 and the tip of the light receiving optical fiber 44,
[Problem to be solved by the invention] However, in the above conventional example, the optical fibers 42° and 44 must be arranged at the same angle with respect to the specimen 32. It is difficult to arrange it, and the arrangement angle varies depending on the size, type, etc. of the specimen 82, so the operability is not good.
本発明は一１１記従来の事情に鑑みてなされたもので、
その目的は、検体を正確に分析、測定することができ、
その操作をきわめて容易に行なうことができる光フアイ
バセンサの提供を目的とする。The present invention has been made in view of the conventional circumstances,
The purpose is to be able to accurately analyze and measure samples,
The object of the present invention is to provide an optical fiber sensor that can be operated extremely easily.
［課題を解決するだめの手段］
上記目的を達成するために、本発明に係るセンサは以下
のように構成されている。[Means for Solving the Problem] In order to achieve the above object, a sensor according to the present invention is configured as follows.
第１図には光フアイバセンサの構成が示されている。FIG. 1 shows the configuration of an optical fiber sensor.
光フアイバセンサは発光用の光源１０と、光源１０から
検体に発した光の反射光を受光して光信号を電気信号に
変換する受光器２６と、光源１０の光を検体へ送り、そ
の反射光を受光器へ送る光ファイバＩ６と、を有してい
る。The optical fiber sensor includes a light source 10 for emitting light, a light receiver 26 that receives the reflected light of the light emitted from the light source 10 to the specimen and converts the optical signal into an electrical signal, and sends the light from the light source 10 to the specimen and detects its reflection. and an optical fiber I6 that sends light to the receiver.
光ファイバ１６は、第３図から理解されるように小径の
素子ファイバを多数束ねたバンドルタイプであり、その
先端は２本に分岐されている。As understood from FIG. 3, the optical fiber 16 is a bundle type in which a large number of small-diameter element fibers are bundled together, and its tip is branched into two.
そして、分岐された一方の光ファイバ１６ａは光源１０
側に配置さ札 他方の光ファイバ１．６ ｂは受光器２
６側に配置されている。One of the branched optical fibers 16a is connected to the light source 10.
The other optical fiber 1.6 b is the receiver 2
It is located on the 6th side.
［作用コ
本発明では、光ファイバ２０が発光用と受光用を兼ねて
おり、光源１０から発した光が光ファイバ１６ａを経て
コネクタ１８に接続された光ファイバ２０を通って検体
に照射さ札 その反射光が再び光ファイバ２０を通って
分岐ファイバである光ファイバ１６ｂを通り、受光器２
６で受光される。[Function] In the present invention, the optical fiber 20 is used for both light emission and light reception, and the light emitted from the light source 10 passes through the optical fiber 20 connected to the connector 18 via the optical fiber 16a, and is irradiated onto the sample. The reflected light passes through the optical fiber 20 again, passes through the optical fiber 16b which is a branch fiber, and passes through the optical receiver 2.
The light is received at 6.
このため、光フアイバ先端部の配＠調整等を行うことな
く、検体の分析、測定を容易かつ正確に行える。Therefore, analysis and measurement of the specimen can be easily and accurately performed without adjusting the arrangement of the tip of the optical fiber.
［実施例コ
以下、図面に基づいて本発明に係る光フアイバセンサの
好適な実施例を説明する。[Embodiment] Hereinafter, preferred embodiments of the optical fiber sensor according to the present invention will be described based on the drawings.
第１図には光フアイバセンサの構成が示されている。FIG. 1 shows the configuration of an optical fiber sensor.
光源ランプ１０の正面には所定間隔をおいてソケット１
４が配置されており、これらの中間位置には集光には集
光レンズ１２が設けられている。In front of the light source lamp 10, sockets 1 are installed at predetermined intervals.
4 are arranged, and a condensing lens 12 is provided at an intermediate position between these condensing lenses.
ソケット１４には、先端が２つに分岐された光ファイバ
１６の一方側１６ａが接続されている。One side 16a of an optical fiber 16 whose tip is branched into two is connected to the socket 14.
光ファイバ１６はコネクタ１８を介して他の光ファイバ
２０に接続されている。The optical fiber 16 is connected to another optical fiber 20 via a connector 18.
また、光フアイバ１６先端の他方側１６ｂはソケット２
２に接続されており、ソケット２２の対抗位置には集光
レンズ２４を挟んで受光素子２６が設けられている。Further, the other side 16b of the tip of the optical fiber 16 is connected to the socket 2.
2, and a light receiving element 26 is provided at a position opposite to the socket 22 with a condensing lens 24 in between.
この受光素子２６には増幅器２８、演算回路３０が接続
されている。An amplifier 28 and an arithmetic circuit 30 are connected to this light receiving element 26 .
以上の構成において、光ファイバ１６は第３図から理解
されるように、小径の素子ファイバを多数整列させて束
ね、これらの素子ファイバを保護−
する被覆が外周に施されたバンドルタイプとされており
、その先端は発光用（１，６Ｒ）と受光用（１６ｂ）と
に分岐されている。In the above configuration, as can be understood from FIG. 3, the optical fiber 16 is of a bundle type in which a large number of small-diameter element fibers are aligned and bundled, and a coating is applied to the outer periphery to protect these element fibers. Its tip is branched into light emitting (1, 6R) and light receiving (16b).
これに対し、光ファイバ２０は第２図から理解されるよ
うに単芯構造とされている。On the other hand, the optical fiber 20 has a single-core structure, as can be understood from FIG.
すなわち、光ファイバ１６は単一モードファイバの集ま
りであるのに対し、光コアイノ＜２０は多数モードファ
イバとされている。That is, the optical fiber 16 is a collection of single mode fibers, whereas the optical core ino<20 is a multimode fiber.
このため、光ファイバ２０は発光用と受光用を兼ねるこ
とができる。Therefore, the optical fiber 20 can serve both for light emission and light reception.
これらの光ファイバ１６．２０のコアは石英ガラス、プ
ラスチック等で形成される力ζ 用〜）られる被覆材粍
製造方法等はその機能によって異なる。The cores of these optical fibers 16 and 20 are made of quartz glass, plastic, etc. The coating material used and the manufacturing method differ depending on their functions.
例えば、温度センサに使用される場合には熱膨張劇粍
導電材料などで被覆さ攬 その製造方法には電気メツキ
法、真空蒸着法などが用いられる。For example, when used in temperature sensors, thermal expansion damage may occur.
It is coated with a conductive material, etc. Electroplating, vacuum evaporation, and other methods are used to manufacture it.
なお、光ファイバ１６を形成する発光用と受光用の素子
ファイバの配列は、ランダムにしてもよいし、中央側と
外周側に区分けしてもよい。The arrangement of the light-emitting and light-receiving element fibers forming the optical fiber 16 may be random, or may be divided into a center side and an outer peripheral side.
次に実施例の作用について説明する。Next, the operation of the embodiment will be explained.
光源１０から発光された光は集光レンズ１２でソケット
１４に集光さ札 光ファイバ１６ａ（１６）を形成する
発光用の各素子ファイバを経由し、コネクタ１８に接続
された発光用と受光用を兼ねる光ファイバ２０を通過し
て、この光ファイバ２０の先端から目的の対象物に照射
される。The light emitted from the light source 10 is condensed into the socket 14 by the condensing lens 12. The light passes through each element fiber for light emission forming the optical fiber 16a (16), and is connected to the connector 18 for light emission and light reception. The light passes through an optical fiber 20 that also serves as an optical fiber, and is irradiated onto a target object from the tip of this optical fiber 20.
そして、その反射光は光ファイバ２０を経由して光ファ
イバ１Ｂ（１６ｂ）を形成する受光用の各素子ファイバ
を通り、集光レンズ２４で集光された後、受光素子２６
で受光される。Then, the reflected light passes through the optical fiber 20, passes through each light receiving element fiber forming the optical fiber 1B (16b), is focused by the condensing lens 24, and then passes through the light receiving element 26.
The light is received by
受光素子２６では反射光の光信号が電気信号に変換さ札
その電気信号は増幅器２８、演算回路８０を経て出力
される。The light receiving element 26 converts the optical signal of the reflected light into an electrical signal.The electrical signal is outputted via the amplifier 28 and the arithmetic circuit 80.
第４図では実施例の使用状態が示されている。FIG. 4 shows the embodiment in use.
図示されるように、光ファイバ２０の先端をそのまま検
体３２に接近させることにより、検体３２の分析、測定
を容易に行なうことが可能となる。As illustrated, by bringing the tip of the optical fiber 20 close to the specimen 32 as it is, it becomes possible to easily analyze and measure the specimen 32.
以上説明したように本実施例によれば、光ファイバ１６
が多数の素子ファイ）＜で形成されており、光ファイバ
１６の先端は分岐されて光源ランプ１０側と受光素子２
６側に接続されているので、本のケーブルで発光と受光
を行なうことができる。As explained above, according to this embodiment, the optical fiber 16
is formed of a large number of element fibers), and the tip of the optical fiber 16 is branched to the light source lamp 10 side and the light receiving element 2.
Since it is connected to the 6 side, it is possible to emit light and receive light using the main cable.
このため、操作性が良好となり、検体３２の分析、測定
をきわめて容易に、しかも正確に行なうことができる。Therefore, operability is improved, and analysis and measurement of the specimen 32 can be performed extremely easily and accurately.
さらに、微少な検体の測定等も正確に行える。Furthermore, measurements of minute specimens can be performed accurately.
また、光ファイノ月６はバンドルタイプであるので、可
撓性が良４、最小曲げ半径を小さくとれる。Further, since the optical fiber 6 is of a bundle type, it has good flexibility and can have a small minimum bending radius.
さらに、バンドルタイプの光コアイノ＜１６にはコネク
タ１８を介して単価の安い単芯の光ファイバ２０が接続
されており、光コアイノ＜２０の使（為棄て使用ができ
るので、非接触型のみならず、接触型の光ファイバセン
号（例えば医療用など）にも適している。Furthermore, an inexpensive single-core optical fiber 20 is connected to the bundle type optical core INO<16 via the connector 18, and since the optical core INO<20 can be used (or discarded), only the non-contact type can be used. It is also suitable for contact-type optical fiber sensors (for example, for medical use).
［発明の効果］
以上説明したように本発明によれば、−本の光フアイバ
ケーブルで発光と受光を行なうことができるので、操作
性が良好となり、検体の分析、測定をきわめて容易かつ
正確に行える。[Effects of the Invention] As explained above, according to the present invention, it is possible to emit light and receive light with one optical fiber cable, which improves operability and makes analysis and measurement of specimens extremely easy and accurate. I can do it.
また、微少な検体の測定等を行なうことも可能となる。Furthermore, it is also possible to perform measurements of minute specimens.
第１図は本発明の実施例を示す概要１
第２図は第１図のＩ−Ｉ線断量感
第３図は第１図のｎ−ｎ線断面ｌ
第４図は使用状態を示す概略図、
第５図は従来例の概要Ａ
第６図は第５図のＩＩＩ−ＩＩＩ線断線断面子第７図来
例の使用状態を示す概略図、である。
１０・・・光源ランプ
１２−・・集光レンズ
−
１４＠・・ソケット
１６・・・光ファイバ
１８・・・コネクタ
２０・・・光ファイバ
２２・・会ソケ・ソト
２４・Φ・集光レンズ
２６・・・受光素子
２８−・・増幅器
３０・・・演算回路Fig. 1 is an outline showing an embodiment of the present invention 1 Fig. 2 is a cross-section of the I-I line in Fig. 1 Fig. 3 is a cross-section on the nn line of Fig. 1 l Fig. 4 is an outline showing the state of use FIG. 5 is an overview of the conventional example. FIG. 6 is a cross section taken along the line III--III in FIG. 5. FIG. 7 is a schematic diagram showing the state of use of the conventional example. 10...Light source lamp 12-...Condensing lens- 14@...Socket 16...Optical fiber 18...Connector 20...Optical fiber 22...Socket/Soto 24/Φ/Condensing lens 26...Photodetector 28-...Amplifier 30...Arithmetic circuit
Claims (1)
気信号に変換する受光器と、 小径の素子ファイバを多数束ねて形成し、先端を分岐し
て一方を光源側に配置し、他方を受光器側に配置したバ
ンドルタイプの光ファイバと、を有することを特徴とす
る光ファイバセンサ。[Scope of Claims] A light source for emitting light, a light receiver that receives the reflected light of the light emitted from the light source to the specimen and converts the optical signal into an electrical signal, and a light receiver formed by bundling a large number of small-diameter element fibers, An optical fiber sensor comprising: a bundle type optical fiber which is branched and one of which is disposed on the light source side and the other is disposed on the light receiver side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5872290A JPH03259730A (en) | 1990-03-09 | 1990-03-09 | Optical fiber sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5872290A JPH03259730A (en) | 1990-03-09 | 1990-03-09 | Optical fiber sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03259730A true JPH03259730A (en) | 1991-11-19 |
Family
ID=13092395
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5872290A Pending JPH03259730A (en) | 1990-03-09 | 1990-03-09 | Optical fiber sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03259730A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09178660A (en) * | 1995-12-27 | 1997-07-11 | Agency Of Ind Science & Technol | Method and apparatus for measurement of optical characteristic of light scattering object |
| WO2001053865A1 (en) * | 2000-01-18 | 2001-07-26 | Renishaw Plc | Spectroscopic probe |
| EP1319939A1 (en) * | 2000-09-22 | 2003-06-18 | Organo Corporation | Concentration measurer |
| JP2007024506A (en) * | 2005-07-12 | 2007-02-01 | Systems Engineering Inc | Optical fiber probe, and light measuring instrument |
| WO2012160774A1 (en) * | 2011-05-20 | 2012-11-29 | 富士フイルム株式会社 | Raman scattering measurement device, optical fibre for raman scattering measurement device and manufacturing method for same |
-
1990
- 1990-03-09 JP JP5872290A patent/JPH03259730A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09178660A (en) * | 1995-12-27 | 1997-07-11 | Agency Of Ind Science & Technol | Method and apparatus for measurement of optical characteristic of light scattering object |
| WO2001053865A1 (en) * | 2000-01-18 | 2001-07-26 | Renishaw Plc | Spectroscopic probe |
| US6809813B2 (en) | 2000-01-18 | 2004-10-26 | Renishaw Plc | Spectroscopic probe |
| EP1319939A1 (en) * | 2000-09-22 | 2003-06-18 | Organo Corporation | Concentration measurer |
| EP1319939A4 (en) * | 2000-09-22 | 2005-11-23 | Organo Corp | Concentration measurer |
| JP2007024506A (en) * | 2005-07-12 | 2007-02-01 | Systems Engineering Inc | Optical fiber probe, and light measuring instrument |
| JP4658722B2 (en) * | 2005-07-12 | 2011-03-23 | 株式会社システムズエンジニアリング | Optical fiber probe and optical measuring device |
| WO2012160774A1 (en) * | 2011-05-20 | 2012-11-29 | 富士フイルム株式会社 | Raman scattering measurement device, optical fibre for raman scattering measurement device and manufacturing method for same |
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