JPS61232866A - Laser irradiation appartus - Google Patents
Laser irradiation appartusInfo
- Publication number
- JPS61232866A JPS61232866A JP60072999A JP7299985A JPS61232866A JP S61232866 A JPS61232866 A JP S61232866A JP 60072999 A JP60072999 A JP 60072999A JP 7299985 A JP7299985 A JP 7299985A JP S61232866 A JPS61232866 A JP S61232866A
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- light
- infrared laser
- laser
- tube
- 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
Landscapes
- Laser Surgery Devices (AREA)
- Radiation-Therapy Devices (AREA)
- Laser Beam Processing (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
産業上の利用分野
本発明はレーザー光を光ファイバーで導びき、人体の治
療や工業製品の加工等に利用されるレーザー照射装置に
関するもので、特に光ファイバーの破損を検出する構成
に関するものである。[Detailed Description of the Invention] Industrial Application Field The present invention relates to a laser irradiation device that guides laser light through an optical fiber and is used for treating the human body, processing industrial products, etc., and particularly relates to a laser irradiation device that guides laser light through an optical fiber and is used to detect damage to the optical fiber. It's about configuration.
、従来の技術
従来、レーザー照射装置における光ファイバー破損検出
の構成としては、例えば特開昭５６−４０７３７号公報
に示されているように、光ファイバー内を伝送されるレ
ーザー光が、出射側端面あるいは破損面で反射されて戻
って来るのを光センサーにより検出し、この光量の増減
により破損を検知する構成が用いられている。Conventionally, as shown in Japanese Patent Laid-Open No. 56-40737, a conventional configuration for detecting damage to an optical fiber in a laser irradiation device is such that a laser beam transmitted within an optical fiber is detected at the output side end face or damaged. A configuration is used in which a light sensor detects the light reflected by a surface and returns, and damage is detected based on an increase or decrease in the amount of light.
発明が解決しようとする問題点
しかしこのように伝送されるレーザー光の戻り光の量を
測定する構成では、戻り光の増減が光ファイバーの破損
以外の原因によっても起こるため、検出が正確にできな
いという問題点がある。例えば光ファイバーを曲げるこ
とや、光フアイバ一端面に汚れが付着することによって
も戻り光は大きく変化し、もともと戻り光の量は微量な
ためこれらの変化と破損を区別することは容易ではなく
誤動作を起こしやすい。これは伝送されるレーザー光の
一部をそのまま破損の検出に利用していることに原因が
ある・
問題点を解決するための手段
本発明は上記問題点を解決するために、光ファイバーに
被覆あるいはチューブを施こし、光ファイバーの破損に
よシ前記被覆から短波長の２次光を発生させるとともに
、赤外レーザー光は通過させるが前記２次光は反射させ
るビームスプリッタ−を入射側に配置して前記２次光を
分離しこれを光センサーによシ検出するようにしたもの
である。Problems to be Solved by the Invention However, with this configuration that measures the amount of returned light from transmitted laser light, the increase or decrease in returned light can occur due to causes other than damage to the optical fiber, so detection cannot be performed accurately. There is a problem. For example, the amount of returned light changes significantly when the optical fiber is bent or when dirt adheres to one end of the optical fiber, and since the amount of returned light is small to begin with, it is difficult to distinguish between these changes and damage, which can lead to malfunctions. Easy to wake up. This is caused by the fact that a part of the transmitted laser beam is used as is for detecting damage.Means for Solving the ProblemThe present invention solves the above problems by coating or coating the optical fiber. A tube is provided, and a short wavelength secondary light is generated from the coating in case the optical fiber is damaged, and a beam splitter is placed on the incident side to allow the infrared laser light to pass through but reflect the secondary light. The secondary light is separated and detected by an optical sensor.
作 用 この技術的手段による作用は次のようになる。For production The effect of this technical means is as follows.
光ファイバーの破損時において破損箇所から赤外レーザ
ー光が外部へ漏れるが、これは被覆あるいはチューブに
より吸収され被覆は発熱し高温になる。高温になった被
覆箇所からは、赤外光より波長の短かい２次光が放射さ
れ、これは光ファイバーを伝わシ入出射端面よシ出射さ
れる。この２次光は前記ビームスプリッタ−によυ反射
され、赤外レーザー光の戻り光とは分離され光センサー
により検出されるから、この光センサーの出力を監視す
ることによシ光ファイバーの破損を検出することができ
る。光センサーで受ける光は赤外レーザー光ではないた
め、従来のような曲げ、端面汚染による影響がなく正確
な光ファイバー破損検出ができる。When an optical fiber breaks, infrared laser light leaks to the outside from the broken part, but this is absorbed by the coating or tube, causing the coating to generate heat and reach a high temperature. Secondary light having a wavelength shorter than that of infrared light is emitted from the heated coating portion, which is transmitted through the optical fiber and exits from the input/output end face. This secondary light is reflected by the beam splitter, separated from the return light of the infrared laser beam, and detected by the optical sensor. By monitoring the output of this optical sensor, it is possible to prevent damage to the optical fiber. can be detected. Since the light received by the optical sensor is not infrared laser light, it is possible to accurately detect optical fiber breakage without the effects of bending or end face contamination as in conventional methods.
実施例
以下本発明の一実施例を添付図面にもとづいて説明する
。第１図において、Ｃｏ２ レーザー発振器１から出射
された波長１０．６μの赤外レーザー光２はこの波長に
対して反射防止膜が施こされたゲルマニュウムのビーム
スプリッタ−３ｔ−通す集光レンズ４によシ集光され、
ＫＨ２−ｓからなる赤外用光ファイバー６に導びかれる
。これから出射された赤外レーザー光は集光レンズ６に
よシ集光され目的部位に照射される。集光レンズ６は照
射目的によっては必ずしも必要ではない。光ファイバー
６にはステンレス製のチューブが被せられている。この
チューブは極めて細くまた薄いので光ファイバー〇可撓
性をそれほど損うことはない。EXAMPLE Hereinafter, an example of the present invention will be described based on the accompanying drawings. In Fig. 1, an infrared laser beam 2 with a wavelength of 10.6μ emitted from a Co2 laser oscillator 1 is passed through a condenser lens 4 through a germanium beam splitter 3t coated with an antireflection film for this wavelength. The light is well focused,
It is guided to an infrared optical fiber 6 made of KH2-s. The infrared laser beam emitted from this is focused by a condensing lens 6 and irradiated onto a target area. The condensing lens 6 is not necessarily required depending on the purpose of irradiation. The optical fiber 6 is covered with a stainless steel tube. This tube is extremely thin and thin, so it does not significantly impair the flexibility of the optical fiber.
またステンレス製チュｉプの代りに樹脂の被覆をしても
良い。光ファイバーが何らかの原因で破損した時は第２
図に示すように破損箇所８で散乱したレーザー光によシ
、ステンレスチューブの７ａは加熱され３００℃〜ＳＯ
Ｏ℃の高温になる。このためこの部位から波長１０．６
μのＣｏ２レーザー光より波長の短かい波長約２〜５μ
近傍をピークとする２次光９が発生しこれが光ファイバ
ー内を伝わり光ファイバーの入出射端面より出射される
。Also, instead of the stainless steel tube, it may be coated with resin. If the optical fiber is damaged for some reason,
As shown in the figure, the stainless steel tube 7a is heated to 300°C and SO by the laser light scattered at the damaged location 8.
The temperature reaches 0°C. Therefore, the wavelength is 10.6 from this part.
The wavelength is about 2 to 5μ, which is shorter than the μ Co2 laser light.
Secondary light 9 having a peak in the vicinity is generated, propagates within the optical fiber, and is emitted from the input/output end face of the optical fiber.
入射側端面より出射された２次光はビームスプリッタ−
３により反射され集光レンズ７で集められ光センサ−１
ｏによシ検出される。波長１０．６μの赤外レーザー光
の戻り光はビームスプリッタ−３を通過するので光セン
サ−６では検知されない。The secondary light emitted from the input side end face is a beam splitter.
3 and collected by the condensing lens 7 to the optical sensor 1.
Detected by o. The returned light of the infrared laser beam with a wavelength of 10.6μ passes through the beam splitter 3 and is therefore not detected by the optical sensor 6.
またこの光センサ−６の直前に波長１０．６μ以長の光
を遮断するフィルターをつけるか、それ以下の波長しか
感応しない光センサーを用いればさらに効果的である。It would be even more effective if a filter that blocks light with a wavelength of 10.6 μm or longer is provided immediately before the optical sensor 6, or if an optical sensor sensitive only to wavelengths shorter than 10.6 μm is used.
このようにして検出された光フフイバー破損信号によシ
レーザーの発信を止めたりあるいはシャッターを閉じた
シの安全措置を取ることができる。Based on the optical fiber damage signal detected in this way, it is possible to take safety measures such as stopping the emission of the laser or closing the shutter.
発明の効果
以上のように本発明では、光ファイバーに被覆を施こす
ことによシ光ファイバー破損時に短波長の２次光を発生
させこれを検出する構成にしており、従来の上うに伝送
赤外ファイバーの戻り光の光量を判別しているのとは異
なり、破損時板外には発生しない２次光を検出している
ため破損検出が正確にできるという効果がある。Effects of the Invention As described above, in the present invention, by applying a coating to the optical fiber, short-wavelength secondary light is generated and detected when the optical fiber is broken, and this is superior to the conventional transmission infrared fiber. Unlike determining the amount of returned light from the board, this method detects secondary light that is not generated outside the board when it is damaged, so it has the effect of accurately detecting damage.
【図面の簡単な説明】
第１図は本発明の一実施例におけるレーザー照射装置の
構成図、第２図は同装置の光ファイバー破損部の詳細図
である。
１゛・・・・・・レーザー発振器、３・・・・・・ビー
ムスプリッタ−１４・・・・・・集光レンズ、６・・・
・・・光フフイバー、７・・・・・・チューブ、１０・
・・・・・光センサ−。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a configuration diagram of a laser irradiation device according to an embodiment of the present invention, and FIG. 2 is a detailed diagram of an optical fiber damaged portion of the same device. 1... Laser oscillator, 3... Beam splitter-14... Condensing lens, 6...
... optical fiber, 7 ... tube, 10.
...optical sensor.
Claims (1)
を集光する集光レンズと、集光された赤外レーザー光を
目的部位へ導びく光ファイバーとを備え、前記光ファイ
バーの外周に赤外レーザー光に対して不透明なる被覆あ
るいはチューブを施こすとともに、光ファイバーの入射
側に前記赤外レーザー光は透過するがそれより短い波長
の光（以下、短波長光と称する）を反射するビームスプ
リッターを配置し、光ファイバー破損時に前記被覆ある
いはチューブに発生した短波長光を前記光ファイバーに
より入射溝側へ導びき、前記ビームスプリッターにより
反射された２次光を光センサーにて検出するように構成
したレーザー照射装置。It is equipped with an infrared laser oscillator, a condensing lens that condenses the laser beam emitted from the oscillator, and an optical fiber that guides the condensed infrared laser beam to the target area. Applying an opaque coating or tube to the optical fiber, and arranging a beam splitter on the incident side of the optical fiber that transmits the infrared laser light but reflects light with a shorter wavelength (hereinafter referred to as short wavelength light), A laser irradiation device configured to guide short wavelength light generated in the coating or tube when the optical fiber breaks to the entrance groove side through the optical fiber, and to detect secondary light reflected by the beam splitter with an optical sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60072999A JPS61232866A (en) | 1985-04-05 | 1985-04-05 | Laser irradiation appartus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60072999A JPS61232866A (en) | 1985-04-05 | 1985-04-05 | Laser irradiation appartus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61232866A true JPS61232866A (en) | 1986-10-17 |
Family
ID=13505620
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60072999A Pending JPS61232866A (en) | 1985-04-05 | 1985-04-05 | Laser irradiation appartus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61232866A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012118095A1 (en) * | 2011-03-01 | 2012-09-07 | オリンパス株式会社 | Light source module and light source system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5857767A (en) * | 1981-10-01 | 1983-04-06 | Matsushita Electric Ind Co Ltd | Laser device |
-
1985
- 1985-04-05 JP JP60072999A patent/JPS61232866A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5857767A (en) * | 1981-10-01 | 1983-04-06 | Matsushita Electric Ind Co Ltd | Laser device |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012118095A1 (en) * | 2011-03-01 | 2012-09-07 | オリンパス株式会社 | Light source module and light source system |
| JP2012179225A (en) * | 2011-03-01 | 2012-09-20 | Olympus Corp | Light source module and light source system |
| CN103402420A (en) * | 2011-03-01 | 2013-11-20 | 奥林巴斯株式会社 | Light source module and light source system |
| EP2682046A1 (en) * | 2011-03-01 | 2014-01-08 | Olympus Corporation | Light source module and light source system |
| EP2682046A4 (en) * | 2011-03-01 | 2014-08-20 | Olympus Corp | Light source module and light source system |
| US9445477B2 (en) | 2011-03-01 | 2016-09-13 | Olympus Corporation | Light source module and light source system |
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