JPS58123505A - Method and device for restoring light transmittance of optical fiber bundle for image transmission of endoscope - Google Patents
Method and device for restoring light transmittance of optical fiber bundle for image transmission of endoscopeInfo
- Publication number
- JPS58123505A JPS58123505A JP57005907A JP590782A JPS58123505A JP S58123505 A JPS58123505 A JP S58123505A JP 57005907 A JP57005907 A JP 57005907A JP 590782 A JP590782 A JP 590782A JP S58123505 A JPS58123505 A JP S58123505A
- Authority
- JP
- Japan
- Prior art keywords
- light
- optical fiber
- fiber bundle
- light transmittance
- image transmission
- 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
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
- G02B23/24—Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes
- G02B23/26—Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes using light guides
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00163—Optical arrangements
- A61B1/00165—Optical arrangements with light-conductive means, e.g. fibre optics
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4298—Coupling light guides with opto-electronic elements coupling with non-coherent light sources and/or radiation detectors, e.g. lamps, incandescent bulbs, scintillation chambers
Abstract
Description
【発明の詳細な説明】
本発明は内視鏡の像伝達用光学繊維束（イメージガイド
オプチカル７アイパーバンドル）がＸ線やγ線等の放射
線照射により着色して光透過率が低下した際に、それを
消色して観察に支障がない光透過率＃まで回復８せるた
めの方法及び装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention provides an optical fiber bundle for image transmission in an endoscope (Image Guide Optical 7 Eyebundle) that is colored when irradiated with radiation such as X-rays or γ-rays and its light transmittance is reduced. This invention relates to a method and apparatus for erasing the color and restoring the light transmittance to #8, which does not interfere with observation.
内視鏡は外部から観察することが不可能な内部中漬部位
を観察するために用いられるものであり、医療用内視鏡
と工業用内視鏡とに大別することができる。医療用内視
鏡は、冑、十二指腸、大腸等の体腔内を観察するための
ものであり、−！だ工業用内視鏡はエンジン、原子炉環
の機器の内部を観察するためのものである。との内視鏡
は、照明光を伝達するための光伝達用光学繊維束と、観
察対象部の像を伝達するための像伝達用光学繊維束とを
備えており、これらの光学繊維束は屈曲した中空部に沿
って挿入することができるようにするために、両端部だ
けが固着され、中間部では各光学繊維が分離されている
。Endoscopes are used to observe internal parts that cannot be observed from the outside, and can be broadly classified into medical endoscopes and industrial endoscopes. Medical endoscopes are used to observe the inside of body cavities such as the helmet, duodenum, and large intestine. Industrial endoscopes are used to observe the inside of engines and reactor ring equipment. The endoscope is equipped with a light transmission optical fiber bundle for transmitting illumination light and an image transmission optical fiber bundle for transmitting an image of the observation target area, and these optical fiber bundles are In order to be able to insert it along a curved hollow, only the ends are fixed, and each optical fiber is separated in the middle.
ところで、特に医療用内視鏡においては、被検者の安全
を確保し、かつ内視鏡の先端部と被検部位との相対位置
を適確に観察するために、放射線による透視観察が行な
われることが多い。また例えば十二指腸観察用内視鏡で
は、内視鏡の処置具案内チャンネルに造影剤狂人チュー
ブを挿入し、このチューブを通して造影剤を膵胆管内に
注入して、膵胆管を放射線撮影するＥ、ＲｏＣ，Ｐ検査
（Ｅｎｄｏｓｃｏｐｉｃ Ｒｅｔｒａｇｒａｄｅ Ｃｈ
ｏｌｏｎｇｉｏｐａｎｃｒｅａｔｏ −ｇｒａｐｈｙ）
にも用いられる。このように医療用内視鏡にあっては放
射線装置と併用される機会が多いため、光学繊維束の先
端部はゴ′Ａパ等の保護チューブを透過した放射線によ
って被爆を受ける。Incidentally, particularly in medical endoscopes, fluoroscopic observation using radiation is performed in order to ensure the safety of the examinee and to accurately observe the relative position between the tip of the endoscope and the examined part. Often. For example, in an endoscope for observing the duodenum, a contrast agent tube is inserted into the treatment instrument guide channel of the endoscope, and the contrast agent is injected into the pancreaticobiliary duct through this tube to perform radiographic imaging of the pancreaticobiliary duct. , P test (Endoscopic Retragrade Ch
olongiopancreato-graphy)
Also used for As described above, since medical endoscopes are often used in combination with radiation equipment, the distal end of the optical fiber bundle is exposed to radiation transmitted through a protective tube such as a goggle.
一般に、光学ガラスは、放射線で被爆されると、着色し
て光透過率が低下する。この着色の原因としては、着色
中心（Ｃｏ１ｏｒ Ｃｅｎｔｅｒ）が考えられる。Generally, when optical glass is exposed to radiation, it becomes colored and its light transmittance decreases. A possible cause of this coloring is a coloring center (Color Center).
すなわち、放射線は主として光学ガラス中の原子に属す
る電子と相互作用を起し、その電子を原子から遊離させ
る。この遊離した電子は更に他の原子の電子と衝突して
これを遊離させる。こうして電子が遊離したあとには、
正の電荷をもつ正孔が残るが、との正孔の大部分は遊離
電子と貴結合する。しかしその一部は光学ガラス中の構
造欠陥に捕えられて着色中心を形成する。との着色中心
にある電子又は正孔は、束縛力が弱いために、放射線の
照射前の結晶の基礎吸収帯よりも長い波長の光を吸収し
、そのために可視域に吸収帯ができ、光学ガラスは着色
する。That is, the radiation mainly interacts with electrons belonging to atoms in the optical glass, and liberates the electrons from the atoms. These liberated electrons further collide with electrons of other atoms to liberate them. After the electrons are liberated in this way,
Although positively charged holes remain, most of the holes with and are bound to free electrons. However, some of it is trapped by structural defects in the optical glass and forms colored centers. Because the binding force of the electrons or holes at the center of the coloring is weak, they absorb light with a wavelength longer than the basic absorption band of the crystal before irradiation with radiation, which creates an absorption band in the visible range, resulting in optical Glass is colored.
この放射線による着色は、コアガラスとクラッドガラス
とによって形成されており、その線径がミクロン単位の
光学繊維を数千ないし数万本集末′１１
した像伝達用光学繊維束においても発生する。したがっ
て、放射線装置と併用される内視鏡は、置型なる放射線
被爆によって４００〜５５０ｎｍの短波長領域において
光吸収が増加し、黄褐色に着色する。この黄褐色に着色
する現象は「黄変」と称されており、保護チューブに入
れたままで放射線照射をした場合に、数Ｒで黄変が発生
する。この黄変によって、光透過率が低下するため、像
伝達用光学繊維束においては、約２０Ｒ程度の放射線照
射を受けると、観察に支障が生じる。この黄変が進んだ
内視鏡は、像伝達用光学繊維束の変換が行ガわれるが、
この像伝達用光学繊維束は高価であす、シかも内視鏡の
製造と同程度の交換作業が必要であるため、像伝達用光
学、繊維束の交換はかなりの費用がかかる。This coloring due to radiation also occurs in an optical fiber bundle for image transmission which is made up of a core glass and a clad glass, and is made up of thousands to tens of thousands of optical fibers each having a wire diameter of microns. Therefore, when an endoscope is used in conjunction with a radiation device, light absorption increases in the short wavelength region of 400 to 550 nm due to stationary radiation exposure, and the endoscope becomes yellowish brown in color. This yellowish-brown coloring phenomenon is called "yellowing," and if the material is irradiated with radiation while still in the protective tube, yellowing occurs within a few R. This yellowing lowers the light transmittance, and therefore, when the optical fiber bundle for image transmission is irradiated with radiation of about 20R, observation becomes difficult. In endoscopes with advanced yellowing, the optical fiber bundle for image transmission is changed, but
This optical fiber bundle for image transmission is expensive, and replacement work is required to the same extent as manufacturing an endoscope, so replacing the optical fiber bundle for image transmission is quite expensive.
放射線による黄変を防止するには、光学ガラス組成中に
、酸化セリウムを混入すれば良いことが知られている。It is known that in order to prevent yellowing due to radiation, it is sufficient to mix cerium oxide into the optical glass composition.
しかし、酸化セリウムを混入すると、ガラス自体が黄味
を帯びるために光透過率が多少低下する。光学レンズ、
プリズム等においては、厚みが薄いので光透過率が低下
しても観察には影響がないが、線径が１０〜５０μで全
長が７００〜１２００ｉｎの光学繊維にあっては、減衰
率が高いためにその影響は大きく、もはや実用に供する
ことができなくなる。この理由から、従来の像伝達用光
学繊維束は、素材ガラス中に酸化セリウムが混入されて
いない。However, when cerium oxide is mixed, the light transmittance decreases to some extent because the glass itself becomes yellowish. optical lens,
For prisms, etc., the thickness is thin, so even if the light transmittance decreases, it will not affect observation, but for optical fibers with a wire diameter of 10 to 50 μ and a total length of 700 to 1200 inches, the attenuation rate is high. The impact is so great that it can no longer be put to practical use. For this reason, in the conventional optical fiber bundle for image transmission, cerium oxide is not mixed into the raw glass.
別の黄変対策としては、像伝達用光学繊維束が放射線を
受けないようにする目的で、像伝達用及び光伝達用光学
繊維束を収納した金属製螺管に鉛。Another measure against yellowing is to use lead in the metal spiral tube that houses the optical fiber bundles for image transmission and light transmission in order to prevent the optical fiber bundles for image transmission from being exposed to radiation.
セリウム等の物質層を設ける技術が実公昭５８−４８０
２５号公報に記載されている。この技術は放射線被爆量
を少なくするという点では効果があるが、しかし金塊製
螺管の隙間からは放射線がそのまま透過するだめ、やは
り黄変が生じる。The technology to provide a layer of material such as cerium was developed in 1986-480.
It is described in Publication No. 25. Although this technique is effective in reducing the amount of radiation exposure, yellowing still occurs because the radiation passes through the gaps in the gold bullion spiral tube.
本発明者は黄変した像伝達用光学繊維束に可視光を照射
したところ、黄変を消色することができることを知った
。史に波長域を変えて照射したところ、短波長細の可視
光は、消色効果が顕著であることを見い出して本発明を
完成した。The inventor of the present invention discovered that yellowing can be erased by irradiating a yellowed image transmission optical fiber bundle with visible light. When irradiation was performed in different wavelength ranges, it was discovered that visible light with short wavelengths had a remarkable decolorizing effect, and the present invention was completed.
したがって本発明は、放射線照射によって光透過率が低
下した像伝達用光学繊維束を消色して光透過率を回復さ
せる方法及び装置を提供するととを目的とするものであ
る。SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a method and apparatus for decolorizing and restoring the light transmittance of an optical fiber bundle for image transmission whose light transmittance has decreased due to radiation irradiation.
本発明の別の目的は、消色効果が顕著な方法及び装置を
提供することを目的とするものである。Another object of the present invention is to provide a method and apparatus that have a remarkable color erasing effect.
本発明の更に別の目的は、消色作業が簡単でコストが安
い方法及び装置を提供することを目的とするものである
。Still another object of the present invention is to provide a method and apparatus for easy decoloring work and low cost.
本発明のもう一つの目的は、構造が簡単であり、取扱い
が容易な装置を提供することを目的とするものである。Another object of the present invention is to provide a device that is simple in structure and easy to handle.
以下、本発明について詳細に説明する。The present invention will be explained in detail below.
第１図に示す装置を用いて、波長と消色効果の関係につ
いて実験を行なった。この第１図において、符号ｌはキ
セノンランプであり、これから後方に放射された光は放
物線状をした反射ミラー２によって前方に反射され、ま
たキセノンランプｌから前方に放射された光は直接に熱
線吸収フィルタ８に入射する。この熱線吸収フィルタ８
を透過した光は、口径が２８龍の絞り４と、干渉フィル
タ５とを通って集光レンズ６に入射する。この集光レン
ズ６から出た光は、１本が約１０〜２０μｍ径の光学繊
維を集束してなる光学繊維束７の入射端面７ａに集光さ
れる。なお集光レンズ６は可視光を効率よく利用するた
めのものであり、必ず設けなければならないものではな
い。この光学繊維束７は、内視鏡の像伝達用として用い
られているものと同一構造をしている。すなわち、両端
部はその一辺が２龍の正方形であり、全長は１２５０ｍ
ｍである。また、両端部ｔｏｗｎは整列積層され、エポ
キシ樹脂で接合されており、可撓性を付与するためにそ
の中間部では分離されている。更にこの光学繊維束７の
外周には、ゴム製の保論チューブ８が被櫟されている。Using the apparatus shown in FIG. 1, an experiment was conducted on the relationship between wavelength and color erasing effect. In Fig. 1, reference numeral 1 denotes a xenon lamp, and the light emitted backward from it is reflected forward by the parabolic reflecting mirror 2, and the light emitted forward from the xenon lamp 1 is directly reflected as a heat ray. The light enters the absorption filter 8. This heat ray absorption filter 8
The transmitted light passes through an aperture 4 with a diameter of 28 mm and an interference filter 5, and enters a condenser lens 6. The light emitted from the condenser lens 6 is condensed onto the incident end surface 7a of an optical fiber bundle 7, each of which is formed by converging optical fibers each having a diameter of about 10 to 20 μm. Note that the condenser lens 6 is for efficiently utilizing visible light, and does not necessarily have to be provided. This optical fiber bundle 7 has the same structure as that used for image transmission in an endoscope. In other words, both ends are square with two dragons on one side, and the total length is 1250m.
It is m. Further, both end portions town are aligned and laminated and joined with epoxy resin, and are separated at the middle portion to provide flexibility. Further, the outer periphery of the optical fiber bundle 7 is covered with a rubber tube 8.
前記光学繊維束７は、その射・出端面から約３００朋の
部分が、管球電圧８５ＫＶｐで管球電流８’００ｍＡの
Ｘ線管で９０Ｉ（程度照射され、黄変させである。The optical fiber bundle 7 was irradiated with an X-ray tube at a tube voltage of 85 KVp and a tube current of 8'00 mA to the extent of 90 I (about 90 I), causing yellowing at a portion approximately 300 mm from its exit/output end surface.
第２図はキセノンランプの放射強度を示すものである。FIG. 2 shows the radiation intensity of a xenon lamp.
このキセノンランプは、可視領域８８０〜：・１ニ ア８Ｑｎｍにおいて、ｔ４ぼ平坦な特性を有している。This xenon lamp has a visible range of 880~:・1ni At 8Q nm, t4 has a flat characteristic.
第８図は熱線吸収フィルタと、干渉フィルタの分光特性
を示すものである。熱線吸収フィルタ８は、曲線Ａに示
すよう々分光特性を有しており、キセノンランプ１から
放出されたエネルギー線のうちから赤外線をカットする
。光学繊維束７は、エポキシ樹脂で接合されており、こ
のエポキシ樹脂の耐熱温度は約８０〜１００℃である。FIG. 8 shows the spectral characteristics of the heat ray absorption filter and the interference filter. The heat ray absorption filter 8 has a spectral characteristic as shown by a curve A, and cuts infrared rays from among the energy rays emitted from the xenon lamp 1. The optical fiber bundle 7 is bonded with an epoxy resin, and the epoxy resin has a heat resistance temperature of about 80 to 100°C.
このエポキシ樹脂は耐熱温度以上に過熱されると、黒化
が生じるだめ、前記熱線吸収フィルタ３で熱的保穫を図
っている。If this epoxy resin is heated above its heat-resistant temperature, it will blacken, so the heat ray absorption filter 3 is used for thermal protection.
干渉フィルタとしては、特性曲線Ｂに示すように中心波
長が４０４ｎｍのものと、特性曲線Ｃに示すように中心
波長が４７０ｎｍＯものと、特性曲線りに示すように中
心波長が５８２ｎｍのものとを選択して用いて、波長に
対する光透過率の変化について調べたところ第４図ない
し第６図に示すデータが得られた。As the interference filters, we selected one with a center wavelength of 404 nm as shown in characteristic curve B, one with a center wavelength of 470 nm as shown in characteristic curve C, and one with a center wavelength of 582 nm as shown in characteristic curve B. When the change in light transmittance with respect to wavelength was investigated using the same method, the data shown in FIGS. 4 to 6 were obtained.
第４図は、第１図の装置において中心波長が４０４ｎｍ
の干渉フィルタを使用して、照射時間を変えて実験した
ときに得られた分光透過率を示すものである。曲線１５
はＸ線照射前の光学繊維束の分光透過率であり、曲１１
１ｉ１１６は９０几のＸ線を先端から３００關の部分に
照射して黄変させたものの分光透過率である。この曲線
１６で示す分光透過率まで低下した光学繊維束に、０．
２５時間。Figure 4 shows that the center wavelength is 404 nm in the apparatus shown in Figure 1.
This figure shows the spectral transmittance obtained when experimenting with different irradiation times using this interference filter. curve 15
is the spectral transmittance of the optical fiber bundle before X-ray irradiation, and curve 11
1i116 is the spectral transmittance of a portion 300 degrees from the tip that was irradiated with 90 degrees of X-rays to cause yellowing. For the optical fiber bundle whose spectral transmittance has decreased to the level shown by curve 16, 0.
25 hours.
０６５時間、１時間、２時間、′４時間だけ、中心波長
が４０４ｎｍの干渉フィルタを透過した可視光を与えた
ところ、曲線１７〜２１に示す分光透過率までそれぞれ
回復した。When visible light transmitted through an interference filter with a center wavelength of 404 nm was applied for 065 hours, 1 hour, 2 hours, and 4 hours, the spectral transmittances recovered to those shown in curves 17 to 21, respectively.
第５図は中心波長が４７０ｎｍの干渉フィルタを用いて
、照射時間を変えて実験したときに得られた分光透過率
を示すものである。この第５図において曲線２２〜２５
は照射時間を０．２５時間、０．５時間、１時間、２時
間としたときの分光透過率を示す。第４図と同様に、曲
線１５はＸ線照射前の分光透過率を示し、曲線１６はＸ
線照射後の分光透過率をそれぞれ示す。FIG. 5 shows the spectral transmittance obtained in an experiment using an interference filter with a center wavelength of 470 nm and varying the irradiation time. In this figure 5, curves 22 to 25
indicates the spectral transmittance when the irradiation time was 0.25 hours, 0.5 hours, 1 hour, and 2 hours. Similarly to FIG. 4, curve 15 shows the spectral transmittance before X-ray irradiation, and curve 16 shows the spectral transmittance before X-ray irradiation.
The spectral transmittance after ray irradiation is shown.
第６図は中心波長が５８２ｎｍの干渉フィルタを用いて
実験したときの分光透過率であり、曲線２８〜８１は照
射時間を０．２５時間、０．５時間、１時間、２時間と
したときの分光透過率をそれぞれ示す。Figure 6 shows the spectral transmittance when experimenting using an interference filter with a center wavelength of 582 nm, and curves 28 to 81 show the irradiation times of 0.25 hours, 0.5 hours, 1 hour, and 2 hours. The spectral transmittance of each is shown.
第７図は、第４図ないし第６図に示す実験結果に基づい
て、４５０ｎｍの波長の光透過率の回復度をプロットし
たものであり、×−×は中心波長が５８２ｎｍの干渉フ
ィルタを使用したときのものであり、ｌｈ□Δは中心波
長が４７０ｎｍの干渉フィルタを、〇−−〇は中心波長
が４０４ｎｍの干渉フィルタを、・−一・は干渉フィル
タを使用しなかったときのものである。ここで縦軸の回
復度はＸ線照射前の光透過率に対するその時点の光透過
率の比である。この第７図から短波長側の可視光が光透
過率の回復に大きく寄与しており、光
まだ照射時間が長いほど、透過率が回復していることが
分る。なお干渉フィルタを使用しない方が回復度が高い
が、これは後述するように光強度が高いこと、及び８８
０〜４００ｎｍの波長成分が含まれていることに起因し
ているものである。Figure 7 plots the degree of recovery of light transmittance at a wavelength of 450 nm based on the experimental results shown in Figures 4 to 6, and x-x indicates the use of an interference filter with a center wavelength of 582 nm. lh□Δ is when an interference filter with a center wavelength of 470 nm is used, 〇--〇 is when an interference filter with a center wavelength of 404 nm is used, and ・-1 is when no interference filter is used. be. Here, the degree of recovery on the vertical axis is the ratio of the light transmittance at that time to the light transmittance before X-ray irradiation. It can be seen from FIG. 7 that visible light on the shorter wavelength side greatly contributes to the recovery of the light transmittance, and the longer the irradiation time, the more the transmittance recovers. Note that the degree of recovery is higher when no interference filter is used, but this is due to the high light intensity and 88
This is due to the fact that it contains wavelength components of 0 to 400 nm.
次に入射光の強度依存性を調べるために、第１図に示す
装置において干渉フイｔ゛夕の代わりにＮＤフィルタを
用いて実験した。第８図は４５０ｎｍにおける光透過率
の回復度と光照射時間との関係を示すものであり、・−
−一・はＮＤフィルタを使用しないときの特性曲線、〇
−−〇はＮＤ４のフィルタを使用して光量を１／４にし
たときの特性曲線、△□△はＮＤ４のフィルタを２枚使
用して光量を１／１６にしたときの特性曲線。Next, in order to investigate the intensity dependence of incident light, an experiment was conducted using the apparatus shown in FIG. 1 using an ND filter instead of an interference filter. Figure 8 shows the relationship between the degree of recovery of light transmittance at 450 nm and the light irradiation time.
-1. is the characteristic curve when no ND filter is used, 〇--〇 is the characteristic curve when the light amount is reduced to 1/4 using an ND4 filter, △□△ is the characteristic curve when two ND4 filters are used. Characteristic curve when the light intensity is reduced to 1/16.
×□×はＮＤ４のフィルタを２枚とＮＤ８のフィルタを
１枚使用して九ｉをｌ／１２８にしたときの特性曲線を
示す。この第８図から光量が大きいほど回復度が高いこ
とが分る。×□× indicates a characteristic curve when two ND4 filters and one ND8 filter are used and 9i is set to l/128. It can be seen from FIG. 8 that the larger the amount of light, the higher the degree of recovery.
第９図は光照射量（１θｇＥ ）に対する回復度の関係
を示すものである。この第９図から光照射量゛と回復度
とは比例しておらす、強い可視光はど回復度が筒いこと
が分る。FIG. 9 shows the relationship between the degree of recovery and the amount of light irradiation (1θgE). It can be seen from FIG. 9 that the amount of light irradiation and the degree of recovery are proportional, and that the degree of recovery is greater for strong visible light.
以上の実験結果を総合すると、約５８０ｎｍ以下の可視
光は光透過率の回復に効果があり、特に短時間で顕著な
効果を得るには短波長側の可視光が良い。したがって短
波長側の可視光を使用し、かつ強い可視光を光学縁・、
維束に入射すれば、効果的に光透過率を回復させること
ができる。To summarize the above experimental results, visible light of about 580 nm or less is effective in restoring light transmittance, and visible light on the short wavelength side is particularly good for obtaining a noticeable effect in a short time. Therefore, short wavelength visible light is used, and strong visible light is used at the optical edge.
If the light enters the fiber bundle, the light transmittance can be effectively restored.
なお、注意すべきことは、５８０ｎｍ以下の波長域の可
視光だけを選択して用いる必要はなく、この波長域を含
んでいる可視光を用いればよいのである。しかし、強い
光の場合にはこれに含まれている赤外線が光学繊維束を
接合しているエポキシ樹脂を黒化させるから、これは熱
線吸収フィルタで除く必要がある。Note that it is not necessary to select and use only visible light in the wavelength range of 580 nm or less, and it is sufficient to use visible light that includes this wavelength range. However, in the case of strong light, the infrared rays contained in this light blacken the epoxy resin that joins the optical fiber bundles, so it is necessary to remove this with a heat ray absorption filter.
第１θ図は光透過率回復装置の一実施例を示すものであ
る。周知のように内視鏡３５は、挿入部８６、手元操作
部８７．接眼レンズ鏡胴８８．照明光源装置８９から構
成されており、内部に像伝達用光学繊維束４０．光伝達
用光学繊維束４１が収納されている。前記挿入部８６は
、像伝達用光学繊維束４０．光伝達用光学繊維束４１の
外周に、短管を連結した金ｌｆ４製パイプとゴム製の・
くイブとが順次設けられており、可読性が付与されてい
る。FIG. 1θ shows an embodiment of the light transmittance recovery device. As is well known, the endoscope 35 includes an insertion section 86, a hand operation section 87. Eyepiece lens barrel 88. It consists of an illumination light source device 89, and an optical fiber bundle 40 for image transmission inside. A light transmission optical fiber bundle 41 is housed therein. The insertion portion 86 includes the image transmission optical fiber bundle 40. On the outer periphery of the optical fiber bundle 41 for light transmission, there is a gold LF4 pipe connected with a short tube and a rubber pipe.
The pages are provided sequentially to improve readability.
この挿入部８６は、手元操作部８７のつまみをまわすこ
とにより、先端を任意の方向に向けることができる。The tip of the insertion section 86 can be directed in any direction by turning the knob of the hand operation section 87.
照明光源装置８９内に設けた光源４２から放出された光
は、光伝達用光学繊維束４１の入射端４１ａから内部に
入り、射出端４１ｂから射出する。Light emitted from the light source 42 provided in the illumination light source device 89 enters the inside of the optical fiber bundle 41 for light transmission from the input end 41a, and exits from the exit end 41b.
この照明光は、照明用窓４３を通って射出し、観察対象
部を照明する。This illumination light is emitted through the illumination window 43 and illuminates the observation target area.
観察対象部からの光は、観察用窓４４．対物レンズ４５
を経て像伝達用光学繊維束４０の入射端４０ａに結像さ
れる。この像伝達用光学繊維束４０の射出端４０ｂに伝
達された像は、接眼レンズ４６で拡大される。The light from the observation target area is transmitted through the observation window 44. Objective lens 45
The image is then formed on the incident end 40a of the image transmission optical fiber bundle 40. The image transmitted to the exit end 40b of the image transmitting optical fiber bundle 40 is magnified by the eyepiece lens 46.
前記内視鏡は、例えばＸ線モニタテレビを用いた透視観
察に供された場合には、挿入部８６の先端部が１回で約
０． ＩＩ（の放射綾被爆を受けるため、徐々に黄変が
進行し、約２４Ｒ程度で観察に支障が生じる。そこで、
例えは放射線被爆量が１、ＯＲに達する毎に光透過率回
復装置４８を用いて光透過率を回復させるのが望ましい
。When the endoscope is used for fluoroscopic observation using, for example, an X-ray monitor television, the distal end of the insertion section 86 is exposed to about 0.00 mm at one time. Due to the radiation exposure of II, yellowing progresses gradually and obstructs observation at about 24R.
For example, it is desirable to restore the light transmittance using the light transmittance recovery device 48 every time the radiation exposure amount reaches 1, OR.
光透過率回復装置ｌ１ｉｔ４８は、グーシンク４９内に
短波長側の可視光を含むエネルギー線を放出する光源５
０９反射ミラー５１．熱線吸収フィルタ５２が収納され
ており、接眼レンズ鏡胴８已に連結される。この連結手
段としてケーシング４９に）（ヨネット爪５３が形成さ
れており、接眼レンズ鏡胴８８のバヨネット爪５４に係
合する。The light transmittance recovery device l1it 48 includes a light source 5 that emits energy rays containing visible light on the short wavelength side in the goosink 49.
09 Reflection mirror 51. A heat ray absorption filter 52 is housed therein and connected to the eyepiece barrel 8. As this connecting means, a bayonet claw 53 is formed on the casing 49 and engages with a bayonet claw 54 of the eyepiece lens barrel 88.
前記光源５０としては、キセノンランプ、ハロゲンラン
プ、メタルハロゲンランプ等が用いられる。なお、接眼
レンズ鏡胴３８を外して、光源５０からの可視光を接眼
レンズ４６を通さないで直接に像伝達用光学繊維束４０
に入射してもよい。さらに対物側に光透過率回復装置を
取り付けて対物側の端面から可視光を入れてもよい。As the light source 50, a xenon lamp, a halogen lamp, a metal halogen lamp, etc. are used. Note that by removing the eyepiece lens barrel 38, the visible light from the light source 50 is directly transmitted to the optical fiber bundle 40 for image transmission without passing through the eyepiece 46.
It may be input to Furthermore, a light transmittance recovery device may be attached to the objective side to allow visible light to enter from the end face on the objective side.
上記構成を有する本発明は、約５８０ｎｍの可視光音用
い、黄変した像伝達用光学繊維束を照射するものであり
、光透過率の回復に効果がめる。更に可視光を照射する
だけでよいから、その作業が簡単であり、しかもコスト
が安いという利点がある。The present invention having the above configuration uses visible light of about 580 nm to irradiate a yellowed image transmission optical fiber bundle, and is effective in restoring light transmittance. Furthermore, since it is only necessary to irradiate visible light, the work is simple and the cost is low.
第１図は実験装置の概略図、第２図はキセノンランプの
放射強度を示す特性図、第８図゛は熱線吸収フィルタと
干渉フィルタの分光透過率を示す特性図、第４図は中心
波長が４０４ｎｍの干渉フィルタを使用したときの分光
透過率の変化を示す特性図、第５図は中心波長が４７０
ｎｍの干渉フィルタを使用したときの分光透過率の変化
を示す特性図、第６図は中心波長が５８２ｎｍの干渉フ
ィルタを使用したときの分光透過率の変化を示す特性図
、第７図は４５０ｎｍの波長における光透過率の（ロ）
後産と光照射時間との関係を示すグラフ、第８図は光量
を変えたときの光照射時間と回復度との関係を示すグラ
フ、第９図は光呻射量と回復度との関係を示すグラフ、
第１θ図は本発明装置の笑施例を示す概略図である。
ｌ・・・キセノンランプ
３・・・熱線吸収フィルタ
４・・・絞り ５・・・干渉フィルタ６・・・集
光レンズ ７・・・光学繊維束４０・・・像伝達用
光学繊維束
４１・・・光伝達用光学繊維束
１・：：
４８・・・光透過率回復装置Figure 1 is a schematic diagram of the experimental equipment, Figure 2 is a characteristic diagram showing the radiation intensity of the xenon lamp, Figure 8 is a characteristic diagram showing the spectral transmittance of the heat absorption filter and interference filter, and Figure 4 is the center wavelength. A characteristic diagram showing the change in spectral transmittance when using an interference filter with a wavelength of 404 nm.
Figure 6 is a characteristic diagram showing the change in spectral transmittance when using an interference filter with a center wavelength of 582 nm, and Figure 7 is a characteristic diagram showing changes in spectral transmittance when using an interference filter with a center wavelength of 582 nm. (b) of the light transmittance at the wavelength of
A graph showing the relationship between afterbirth and light irradiation time, Figure 8 is a graph showing the relationship between light irradiation time and degree of recovery when the light amount is changed, and Figure 9 is a graph showing the relationship between light irradiation amount and degree of recovery. A graph showing,
FIG. 1θ is a schematic diagram showing a second embodiment of the device of the present invention. l... Xenon lamp 3... Heat ray absorption filter 4... Aperture 5... Interference filter 6... Condensing lens 7... Optical fiber bundle 40... Optical fiber bundle for image transmission 41. ... Optical fiber bundle for light transmission 1:: 48 ... Light transmittance recovery device
Claims (1)
と、観察対象部を観察するための像伝達用光学繊維束と
を備えた内視鏡において、前記像伝達用光学繊維束の光
透過率が低下した際に、その端面から約５８０ｎｍ以下
の波長成分を含む可視光を入射させるようにしたことを
特徴とする光透過率回後方法。 （２）前記可視光は、約４５０ｎｍ以下の波長成分を含
むことを特徴とする特許請求の範囲第１項記載の光透過
率回復方法。 （３）約５８０ｎｍ以下の波長成分を含む可視光を放射
する光源と、この光源を収納しており、内視鏡に装着さ
れた際に前記光源を像伝達用光学繊維束の入射端に光学
的に対面させるケーシングとからなることを特徴とする
光透過率回復装置っ（４） 前記光源はキセノンラン
プであることを特徴とする特許請求の範囲第８項記載の
光透過率回復装置。 （５）前記光源はハロゲンランプであることを特徴とす
る特許請求の範囲第３項記載の光透過率回復装置。[Scope of Claims] (1) An endoscope comprising a light-transmitting optical fiber bundle for illuminating an observation target area and an image-transmitting optical fiber bundle for observing the observation target area, wherein the 1. A method for recovering light transmittance, characterized in that when the light transmittance of a transmission optical fiber bundle decreases, visible light containing a wavelength component of about 580 nm or less is made incident from the end face thereof. (2) The light transmittance recovery method according to claim 1, wherein the visible light includes a wavelength component of about 450 nm or less. (3) A light source that emits visible light containing a wavelength component of about 580 nm or less is housed, and when attached to an endoscope, the light source is optically connected to the input end of the optical fiber bundle for image transmission. (4) The light transmittance recovery device according to claim 8, characterized in that the light source is a xenon lamp. (5) The light transmittance recovery device according to claim 3, wherein the light source is a halogen lamp.
Priority Applications (10)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57005907A JPS58123505A (en) | 1982-01-20 | 1982-01-20 | Method and device for restoring light transmittance of optical fiber bundle for image transmission of endoscope |
| FR8202432A FR2500201A1 (en) | 1981-02-17 | 1982-02-15 | METHOD AND APPARATUS FOR REINSTALLING THE OPTICAL TRANSMITTANCE OF A BEAM OF OPTICAL FIBERS AFTER REDUCTION BY IRRADIATION |
| CA000396344A CA1192071A (en) | 1981-02-17 | 1982-02-16 | Method and apparatus for recovering a light transmittance of an image transmitting optical fiber bundle used in a fiberoptic endoscope |
| AT82300813T ATE17790T1 (en) | 1981-02-17 | 1982-02-17 | METHOD AND APPARATUS FOR RESTORING THE LIGHT TRANSMITTING PROPERTIES OF AN IMAGE TRANSMITTING OPTICAL FIBER BUNDLE FOR USE IN A FIBER END SCOPE. |
| DE8282300813T DE3268730D1 (en) | 1981-02-17 | 1982-02-17 | Method of and apparatus for restoring the light transmittance of an image transmitting optical fiber bundle used in a fiberoptic endoscope |
| AU80540/82A AU541958B2 (en) | 1981-02-17 | 1982-02-17 | Apparatus for recovering a light transmittance of an image transmitting optical fiber bundle |
| US06/349,619 US4523806A (en) | 1981-02-17 | 1982-02-17 | Method and apparatus for restoring the light transmittance of an image-transmitting optical fiber bundle used in a fiber optic endoscope |
| GB8204625A GB2094021B (en) | 1981-02-17 | 1982-02-17 | Restoring the light transmittance of an image transmitting optical fiber bundle |
| EP82300813A EP0058574B1 (en) | 1981-02-17 | 1982-02-17 | Method of and apparatus for restoring the light transmittance of an image transmitting optical fiber bundle used in a fiberoptic endoscope |
| AR288452A AR229690A1 (en) | 1981-02-17 | 1982-02-17 | APPARATUS TO RECOVER THE REDUCTION INDUCED BY IRRADIATION IN THE TRANSMITANCE OF LIGHT FROM A BEAM OF OPTICAL FIBERS TRANSMITTING IMAGES |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57005907A JPS58123505A (en) | 1982-01-20 | 1982-01-20 | Method and device for restoring light transmittance of optical fiber bundle for image transmission of endoscope |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58123505A true JPS58123505A (en) | 1983-07-22 |
| JPS6262322B2 JPS6262322B2 (en) | 1987-12-25 |
Family
ID=11623966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57005907A Granted JPS58123505A (en) | 1981-02-17 | 1982-01-20 | Method and device for restoring light transmittance of optical fiber bundle for image transmission of endoscope |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58123505A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104736044A (en) * | 2012-08-03 | 2015-06-24 | 塞卡解决方案有限责任公司 | Diagnostic device, therapeutic device, and uses thereof |
| WO2020129147A1 (en) * | 2018-12-18 | 2020-06-25 | オリンパス株式会社 | Endoscope light source device and endoscope having same |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5343025A (en) * | 1976-09-30 | 1978-04-18 | Yamatake Honeywell Co Ltd | Thermocouples for detecting flame |
| JPS5429105A (en) * | 1977-08-09 | 1979-03-05 | Vickers Sperry Rand Gmbh | Impeller pump for steering aid |
-
1982
- 1982-01-20 JP JP57005907A patent/JPS58123505A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5343025A (en) * | 1976-09-30 | 1978-04-18 | Yamatake Honeywell Co Ltd | Thermocouples for detecting flame |
| JPS5429105A (en) * | 1977-08-09 | 1979-03-05 | Vickers Sperry Rand Gmbh | Impeller pump for steering aid |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104736044A (en) * | 2012-08-03 | 2015-06-24 | 塞卡解决方案有限责任公司 | Diagnostic device, therapeutic device, and uses thereof |
| WO2020129147A1 (en) * | 2018-12-18 | 2020-06-25 | オリンパス株式会社 | Endoscope light source device and endoscope having same |
| CN113164028A (en) * | 2018-12-18 | 2021-07-23 | 奥林巴斯株式会社 | Light source device for endoscope and endoscope having the same |
| JPWO2020129147A1 (en) * | 2018-12-18 | 2021-11-11 | オリンパス株式会社 | Light source device for endoscopes, endoscopes having them, heat dissipation method |
| US11889989B2 (en) | 2018-12-18 | 2024-02-06 | Olympus Corporation | Light source apparatus for endoscope, endoscope using the same and heat dissipation method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6262322B2 (en) | 1987-12-25 |
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