JP4827636B2 - Endoscope device for magnification observation - Google Patents

Endoscope device for magnification observation Download PDF

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JP4827636B2
JP4827636B2 JP2006188996A JP2006188996A JP4827636B2 JP 4827636 B2 JP4827636 B2 JP 4827636B2 JP 2006188996 A JP2006188996 A JP 2006188996A JP 2006188996 A JP2006188996 A JP 2006188996A JP 4827636 B2 JP4827636 B2 JP 4827636B2
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JP2008012212A (en
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信行 斉田
浩平 池谷
昭博 高橋
慎介 岡田
吉延 沼澤
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Hoya Corp
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この発明は、被写体の通常観察像をその被写体との間に距離をおいた位置から取り込むための通常観察用観察窓と、被写体の表面に当接又は極近接されて被写体の顕微鏡的拡大観察像を取り込むための拡大観察用観察窓とが挿入部の先端に併設された拡大観察用内視鏡装置に関する。   The present invention provides a normal observation observation window for capturing a normal observation image of a subject from a position at a distance from the subject, and a microscopic magnified observation image of the subject in contact with or in close proximity to the surface of the subject The magnifying observation endoscope apparatus in which an observation window for magnifying observation for taking in is provided at the tip of an insertion portion.

なお、本件において「通常観察像」とは、肉眼で通常見える程度の拡大率又は縮小率の観察像を意味しており、肉眼では例え接近しても見えないような大きな拡大率の観察像と区別する概念である。   In this case, “normal observation image” means an observation image with an enlargement ratio or reduction ratio that is normally visible to the naked eye, and an observation image with a large enlargement ratio that cannot be seen even with the naked eye. It is a concept to distinguish.

体内の管腔臓器内を内視鏡で視覚的に観察して病変等の有無を検査する手技が広く一般に行われている。しかし、そのような内視鏡検査で病変を見つけても、その病変が癌であるか否か等の診断を行うのは困難な場合が多い。   A technique for inspecting the presence or absence of a lesion by visually observing the inside of a luminal organ in the body with an endoscope is widely performed. However, even if a lesion is found by such endoscopy, it is often difficult to make a diagnosis as to whether or not the lesion is cancer.

そこで、内視鏡検査で怪しいと思われた部分については生検鉗子等を用いて組織採取が行われるが、癌でも何でもない場合が大半であるにもかかわらず、単なる検査のために体内の管腔壁の粘膜を損傷させて出血させてしまうことになる。   Therefore, tissues that are considered suspicious by endoscopy are collected using biopsy forceps, etc., but in most cases it is not cancer or anything. It damages the mucous membrane of the lumen wall and causes bleeding.

そこで近年は、例えば共焦点内視鏡等のように１ｍｍに満たない範囲の顕微鏡的拡大像を得ることができる拡大観察用内視鏡装置が開発され、生検組織を採取することなく、内視鏡による直接観察だけで癌であるか否かの診断を相当の確率で行える可能性がでてきている（例えば、特許文献１、２、３）。
特開２００４−３４４２０１ 特開２００５−８０７６９ 特開２００５−６４０ Therefore, in recent years, an endoscopic apparatus for magnifying observation capable of obtaining a microscopic magnified image in a range of less than 1 mm, such as a confocal endoscope, has been developed. There is a possibility that a diagnosis of whether or not the cancer is present can be performed with a considerable probability only by direct observation with a endoscope (for example, Patent Documents 1, 2, and 3).
JP 2004-344201 A JP-A-2005-80769 JP-A-2005-640

顕微鏡的拡大観察像を得ることしかできない拡大観察用内視鏡装置では、広い範囲をくまなく観察してその中から怪しい部分を見つけるいわゆるスクリーニング検査を行うことができない。   In an endoscope apparatus for magnification observation that can only obtain a microscopic magnified observation image, a so-called screening test cannot be performed in which a suspicious part is found by observing all over a wide range.

そこで、拡大観察用内視鏡装置には、被写体の通常観察像をその被写体との間に距離をおいた位置から取り込むための通常観察用観察窓と、被写体の表面に当接又は極近接されて被写体の拡大観察像を取り込むための拡大観察用観察窓とが併設されて、通常観察用観察窓を通じてスクリーニング検査で異常が疑われる部分を見つけたら、その部位に対して拡大観察用観察窓を通じた顕微鏡的拡大観察を行うようにしている。   Therefore, in the endoscope apparatus for magnifying observation, a normal observation observation window for capturing a normal observation image of the subject from a position at a distance from the subject and a surface of the subject are in contact with or in close proximity to the subject. And an observation window for magnifying observation to capture a magnified observation image of the subject. Microscopic magnification observation is performed.

しかし、拡大観察用観察窓を通して得られる顕微鏡的拡大像は細胞レベルのものでスクリーニング検査像とは全く様相が異なるので、顕微鏡的拡大観察を行おうとする被写体が実際にスクリーニング検査で異常が疑われた部位なのかどうかはっきりと判断できない問題が生じていた。   However, the microscopic magnified image obtained through the observation window for magnifying observation is at the cellular level and is completely different from the screening examination image, so the subject trying to perform microscopic magnifying observation is actually suspected of being abnormal in the screening examination. There was a problem in which it was not possible to clearly determine whether it was a part.

そこで本発明は、顕微鏡的拡大観察の対象部位を通常観察像により確実に確認することができる拡大観察用内視鏡装置を提供することを目的とする。   Therefore, an object of the present invention is to provide an endoscope apparatus for magnification observation that can surely confirm a target site for microscopic magnification observation with a normal observation image.

上記の目的を達成するため、本発明の拡大観察用内視鏡装置は、被写体の通常観察像を被写体との間に距離をおいた位置から取り込むための通常観察用観察窓と、被写体の表面に当接又は極近接されて被写体の拡大観察像を取り込むための拡大観察用観察窓とが併設された拡大観察用内視鏡装置において、拡大観察用観察窓の外縁部に隣接して拡大観察用観察窓を間に挟んだ位置関係の少なくとも二箇所に、拡大観察用観察窓の前方近接位置の被写体の通常観察像を取り込むための補助観察用観察窓を設けたものである。   In order to achieve the above object, an endoscope apparatus for magnification observation according to the present invention includes a normal observation observation window for capturing a normal observation image of a subject from a position at a distance from the subject, and a surface of the subject. Magnifying observation endoscope apparatus provided with a magnifying observation observation window for capturing a magnified observation image of a subject in contact with or in close proximity to the magnifying glass adjacent to the outer edge of the magnifying observation observation window An auxiliary observation observation window for capturing a normal observation image of a subject at a position close to the front of the magnification observation observation window is provided in at least two positions in the positional relationship between the observation observation windows.

なお、少なくとも二つの補助観察用観察窓から取り込まれた複数の通常観察像を並べて表示するモニタが設けられているとよく、少なくとも二つの補助観察用観察窓から取り込まれた複数の通常観察像において同じ被写体を観察している領域では、その通常観察像がモニタの同じ位置に重複して表示されるようにしてもよい。   In addition, it is preferable that a monitor that displays a plurality of normal observation images captured from at least two auxiliary observation observation windows side by side is provided, and a plurality of normal observation images captured from at least two auxiliary observation observation windows are provided. In the region where the same subject is observed, the normal observation image may be displayed in duplicate at the same position on the monitor.

また、補助観察用観察窓から取り込まれた通常観察像がイメージガイドファイババンドルにより伝送されて、そのイメージガイドファイババンドルの射出端面の像が撮像素子に投影されて撮像されるようにしてもよい。   Alternatively, the normal observation image captured from the auxiliary observation observation window may be transmitted by the image guide fiber bundle, and the image of the exit end face of the image guide fiber bundle may be projected onto the image sensor and captured.

また、拡大観察用観察窓内には、光軸に垂直な２次元方向に走査される光学単ファイバの先端面の位置と拡大観察用観察窓の表面付近の位置とを共焦点の位置関係に配置した共焦点光学系が設けられていてもよい。   In the observation window for magnification observation, the position of the tip surface of the optical single fiber scanned in a two-dimensional direction perpendicular to the optical axis and the position near the surface of the observation window for magnification observation are in a confocal positional relationship. An arranged confocal optical system may be provided.

本発明によれば、拡大観察用観察窓の外縁部に隣接して拡大観察用観察窓を間に挟んだ位置関係の少なくとも二箇所に、拡大観察用観察窓の前方近接位置の被写体の観察像を取り込むための補助観察用観察窓を設けたことにより、拡大観察用観察窓を通して行われる顕微鏡的拡大観察の対象部位を、補助観察用観察窓を通して得られる通常観察像で確実に確認することができる。   According to the present invention, the observation image of the subject at a position close to the front of the observation window for magnification observation is at least two places in the positional relationship adjacent to the outer edge of the observation window for magnification observation with the observation window for magnification observation interposed therebetween. By providing an observation window for auxiliary observation to capture the image, it is possible to reliably confirm the target site for microscopic magnification observation performed through the observation window for magnification observation with the normal observation image obtained through the observation window for auxiliary observation. it can.

被写体の通常観察像を被写体との間に距離をおいた位置から取り込むための通常観察用観察窓と、被写体の表面に当接又は極近接されて被写体の拡大観察像を取り込むための拡大観察用観察窓とが併設された拡大観察用内視鏡装置において、拡大観察用観察窓の外縁部に隣接して拡大観察用観察窓を間に挟んだ位置関係の少なくとも二箇所に、拡大観察用観察窓の前方近接位置の被写体の通常観察像を取り込むための補助観察用観察窓を設ける。   A normal observation observation window for capturing a normal observation image of a subject from a position at a distance from the subject, and a magnification observation for capturing a magnified observation image of the subject in contact with or in close proximity to the surface of the subject In an endoscope apparatus for magnifying observation that is also provided with an observing window, observing for magnifying observation in at least two locations with the magnifying observation window sandwiched between the outer edges of the magnifying observation window An auxiliary observation observation window is provided for capturing a normal observation image of a subject at a position close to the front of the window.

図面を参照して本発明の実施例を説明する。
図２は、本発明の拡大観察用内視鏡装置のシステム全体を略示しており、体内に挿入される可撓性の挿入部１の最先端部に、観察窓や照明窓等が配置された先端部本体２が連結され、挿入部１の基端には、各種操作部材が配置された操作部３が連結されている。 Embodiments of the present invention will be described with reference to the drawings.
FIG. 2 schematically shows the entire system of the endoscope apparatus for magnifying observation according to the present invention, and an observation window, an illumination window, and the like are arranged at the most distal end portion of the flexible insertion portion 1 to be inserted into the body. The distal end main body 2 is connected, and the operation portion 3 in which various operation members are arranged is connected to the proximal end of the insertion portion 1.

操作部３から延出するコードの先端には、内視鏡の外部に配置されたビデオプロセッサ５と共焦点像プロセッサ６とに分かれて接続される第１のコネクタ７と第２のコネクタ８とが設けられている。   A first connector 7 and a second connector 8 which are connected to a video processor 5 and a confocal image processor 6 which are arranged outside the endoscope are connected to the tip of a cord extending from the operation unit 3. Is provided.

９は、ビデオプロセッサ５から出力される映像信号による通常観察画像を表示するためのメインモニタ、１０は、共焦点像プロセッサ６から出力される映像信号による顕微鏡的拡大観察画像を表示するための拡大像モニタである。   9 is a main monitor for displaying a normal observation image by a video signal output from the video processor 5, and 10 is an enlargement for displaying a microscopic enlarged observation image by a video signal output from the confocal image processor 6. It is an image monitor.

図３は、挿入部１の最先端部分の斜視図であり、先端部本体２の先端面に、照明光を放射するための照明窓１１と、その照明窓１１から放射された照明光により照明された被写体の通常観察像を被写体との間に距離をおいた位置から取り込むための通常観察用観察窓１２とが、前方に向けて並んで配置されている。１３は、処置具挿通チャンネル４の出口開口である。なお、送気送水ノズル等の図示は省略されている。   FIG. 3 is a perspective view of the most distal portion of the insertion portion 1, and an illumination window 11 for emitting illumination light to the distal end surface of the distal end portion main body 2 and illumination with illumination light emitted from the illumination window 11. A normal observation observation window 12 for taking a normal observation image of the subject that has been taken from a position at a distance from the subject is arranged side by side in a forward direction. Reference numeral 13 denotes an outlet opening of the treatment instrument insertion channel 4. In addition, illustration of an air supply / water supply nozzle etc. is abbreviate | omitted.

１５は、被写体の表面に当接又は極近接されてその被写体の顕微鏡的拡大観察像を取り込むための拡大観察用観察窓であり、先端部本体２の先端面から前方に突出した突出部の先端に前方に向けて配置されている。   Reference numeral 15 denotes an observation window for magnifying observation that is brought into contact with or in close proximity to the surface of the subject to capture a microscopic magnified observation image of the subject, and the tip of the protruding portion that protrudes forward from the tip surface of the tip portion body 2. It is arranged facing forward.

そして、拡大観察用観察窓１５の外縁部に隣接して拡大観察用観察窓１５を間に挟んだ位置関係の二箇所に、拡大観察用観察窓１５の前方近接位置の被写体の通常観察像を取り込むための補助観察用観察窓１４Ａ，１４Ｂが設けられている。この実施例では、二つの補助観察用観察窓１４Ａ，１４Ｂが拡大観察用観察窓１５の光軸周りの１８０°対称位置に配置されている。   Then, the normal observation images of the subject at the position close to the front of the observation window for magnification observation 15 are placed at two positions adjacent to the outer edge of the observation window for magnification observation 15 with the observation window for magnification observation 15 interposed therebetween. Auxiliary observation windows 14A and 14B for capturing are provided. In this embodiment, the two auxiliary observation observation windows 14 </ b> A and 14 </ b> B are arranged at 180 ° symmetrical positions around the optical axis of the magnification observation observation window 15.

図４は挿入部１の最先端部分の側面断面図であり、通常観察用観察窓１２内には、広い視野角（例えば１００°〜１４０°程度）を得るための対物光学系２１が配置されて、その対物光学系２１による被写体の投影位置に固体撮像素子２２の撮像面が配置されている。２３は、固体撮像素子２２で得られた撮像信号を伝送するための信号ケーブルである。   FIG. 4 is a side sectional view of the most distal portion of the insertion portion 1, and an objective optical system 21 for obtaining a wide viewing angle (for example, about 100 ° to 140 °) is disposed in the observation window 12 for normal observation. Thus, the imaging surface of the solid-state imaging device 22 is arranged at the projection position of the subject by the objective optical system 21. Reference numeral 23 denotes a signal cable for transmitting an imaging signal obtained by the solid-state imaging device 22.

この実施例の通常観察用観察窓１２内の対物光学系２１は固定焦点であるが、通常観察用観察窓１２の表面から１０ｃｍ以上離れた距離の体内粘膜でも明瞭に観察できるように焦点深度が深くとられていて、そのベストピント位置は通常観察用観察窓１２の表面から例えば１ｃｍ程度であり、最短観察距離は３〜５ｍｍ程度である。   Although the objective optical system 21 in the observation window for normal observation 12 of this embodiment has a fixed focus, the depth of focus is set so that clear observation is possible even in the body mucosa at a distance of 10 cm or more from the surface of the observation window 12 for normal observation. It is taken deeply and its best focus position is, for example, about 1 cm from the surface of the observation window 12 for normal observation, and the shortest observation distance is about 3-5 mm.

拡大観察用観察窓１５内には共焦点光学系２５が配置されていて、その奥に配置された光学単ファイバ２６（シングルモードファイバ）の先端面２６ａの位置と拡大観察用観察窓１５の外表面位置（又は、それよりごく僅かに前方の位置）とが共焦点の位置関係になるようにセットされている。   A confocal optical system 25 is disposed in the observation window for magnification observation 15, and the position of the distal end surface 26 a of the optical single fiber 26 (single mode fiber) disposed in the back thereof and the outside of the observation window for magnification observation 15. It is set so that the surface position (or a position slightly in front of it) becomes a confocal positional relationship.

光学単ファイバ２６の先端面２６ａは、例えば電磁力等を用いた走査機構２７により共焦点光学系２５の光軸に対して垂直な平面上で２次元的に走査され、光学単ファイバ２６内を伝送されてきてその先端面２６ａから射出されたレーザ光が拡大観察用観察窓１５の外表面付近の被写体で焦点を結んでそこから反射されると、その反射光が光学単ファイバ２６の先端面２６ａに焦点を結ぶ。体内の粘膜面に蛍光色素が散布されている場合には、レーザ光により励起された蛍光が被写体になる。   The tip surface 26 a of the optical single fiber 26 is scanned two-dimensionally on a plane perpendicular to the optical axis of the confocal optical system 25 by a scanning mechanism 27 using, for example, electromagnetic force, and the inside of the optical single fiber 26 is scanned. When the laser beam transmitted and emitted from the distal end surface 26a is focused on a subject near the outer surface of the magnifying observation observation window 15 and reflected from the subject, the reflected light is reflected from the distal end surface of the optical single fiber 26. Focus on 26a. When a fluorescent dye is dispersed on the mucosal surface of the body, the fluorescence excited by the laser beam becomes the subject.

したがって、光学単ファイバ２６内を通って基端側に戻される反射光をその先端面２６ａの走査運動に対応する位置に表示させることにより、拡大観察用観察窓１５の表面付近の被写体の１ｍｍ以下程度の領域（例えば０．５ｍｍの領域）の鮮明な顕微鏡的拡大観察像を得ることができる。ただし、拡大観察用観察窓１５内の光学系が、光学単ファイバ２６の先端面２６ａをピンホールの代用とする共焦点光学系２５を用いていない、いわゆる通常の拡大観察光学系により顕微鏡的拡大観察を行えるようにしたものであっても差し支えない。   Therefore, the reflected light that returns to the base end side through the optical single fiber 26 is displayed at a position corresponding to the scanning movement of the distal end surface 26a, so that the object near the surface of the observation window 15 for magnification observation is 1 mm or less. It is possible to obtain a clear microscopic magnified observation image of a certain region (for example, a region of 0.5 mm). However, the optical system in the observation window 15 for magnification observation does not use the confocal optical system 25 in which the tip surface 26a of the optical single fiber 26 is used as a substitute for a pinhole. It does not matter if it can be observed.

拡大観察用観察窓１５の外縁部に配置された一対の補助観察用観察窓１４Ａ，１４Ｂ内には各々、例えば単レンズを用いた簡易な対物レンズ３１Ａ，３１Ｂが配置されていて、その対物レンズ３１Ａ，３１Ｂによる被写体の各投影位置に、例えば数百〜数千本程度の比較的少量の光学繊維を束ねた簡便なイメージガイドファイババンドル３２Ａ，３２Ｂの入射端面が各々配置されている。   In each of the pair of auxiliary observation observation windows 14A and 14B arranged at the outer edge of the magnification observation window 15, simple objective lenses 31A and 31B using, for example, a single lens are arranged. The incident end faces of simple image guide fiber bundles 32A and 32B in which a relatively small amount of optical fibers of, for example, several hundred to several thousand are bundled are arranged at respective projection positions of the subject by 31A and 31B.

一対の対物レンズ３１Ａ，３１Ｂと一対のメージガイドファイババンドル３２Ａ，３２Ｂには、各々同じスペックのものが用いられており、各イメージガイドファイババンドル３２Ａ，３２Ｂは挿入部１内に全長にわたって挿通配置されていて、その射出端はビデオプロセッサ５に接続される第１のコネクタ７に達している。   The pair of objective lenses 31A and 31B and the pair of image guide fiber bundles 32A and 32B have the same specifications, and the image guide fiber bundles 32A and 32B are inserted into the insertion portion 1 over the entire length. In addition, the injection end reaches the first connector 7 connected to the video processor 5.

対物レンズ３１Ａ，３１Ｂは広角の固定焦点であり、その表面から数ｍｍ〜１０ｍｍ程度の位置の近接距離の体内粘膜の通常観察像を観察できるようにベストピント位置が例えば３〜５ｍｍ程度に設定されている。   The objective lenses 31A and 31B have a wide-angle fixed focus, and the best focus position is set to, for example, about 3 to 5 mm so that a normal observation image of the internal mucosa at a close distance of about several mm to 10 mm from the surface can be observed. ing.

図１は、本発明の拡大観察用内視鏡装置のシステム構成のブロック図であり、照明窓１１に設けられた凹レンズの裏側には、挿入部１内から第１のコネクタ７に至る空間内に配置された照明用ライトガイドファイババンドル２８の射出端が配置されている。   FIG. 1 is a block diagram of a system configuration of an endoscope apparatus for magnification observation according to the present invention. In the back side of a concave lens provided in an illumination window 11, there is a space from the insertion portion 1 to the first connector 7. The exit end of the light guide fiber bundle 28 for illumination arranged at is arranged.

拡大観察用観察窓１５の外縁部に配置された二つの補助観察用観察窓１４Ａ，１４Ｂを通して得られる観察範囲は各々非常にワイドであり、拡大観察用観察窓１５の表面から前方数ｍｍの位置より遠方の被写体については双方の観察範囲が部分的に重複するようになっている。   The observation ranges obtained through the two auxiliary observation observation windows 14A and 14B arranged at the outer edge of the enlargement observation window 15 are very wide, and are several mm forward from the surface of the enlargement observation window 15. For a farther subject, both observation ranges partially overlap.

光源装置を兼用するビデオプロセッサ５内には、通常観察用の照明光を発生するための光源ランプ５１が配置されていて、光源ランプ５１から放射された照明光は集光レンズ５２に導かれて照明用ライトガイドファイババンドル２８の入射端に入射する。   A light source lamp 51 for generating illumination light for normal observation is disposed in the video processor 5 also serving as a light source device. The illumination light emitted from the light source lamp 51 is guided to a condenser lens 52. The light enters the incident end of the illumination light guide fiber bundle 28.

また、固体撮像素子２２で撮像された内視鏡観察像を処理して映像信号をメインモニタ９に出力するための主映像信号処理回路５３の他に、副映像信号処理回路５５等が設けられているが、それについては後述する。   In addition to the main video signal processing circuit 53 for processing the endoscope observation image picked up by the solid-state image pickup device 22 and outputting the video signal to the main monitor 9, a sub video signal processing circuit 55 and the like are provided. This will be described later.

共焦点像プロセッサ６内には、レーザ光を射出する共焦点用レーザ光源６１が配置されていて、そのレーザ光源６１と受光素子６２とが、光カプラ６３によって光学単ファイバ２６の後端面２６ｂに並列に接続されている。   A confocal laser light source 61 for emitting laser light is disposed in the confocal image processor 6, and the laser light source 61 and the light receiving element 62 are attached to the rear end surface 26 b of the optical single fiber 26 by the optical coupler 63. Connected in parallel.

したがって、レーザ光源６１から光学単ファイバ２６にレーザ光が入射されるだけでなく、光学単ファイバ２６の後端面２６ｂから射出されたレーザ光が受光素子６２に入射する。   Accordingly, not only laser light is incident on the optical single fiber 26 from the laser light source 61, but also laser light emitted from the rear end surface 26 b of the optical single fiber 26 is incident on the light receiving element 62.

レーザ光源６１から光カプラ６３を経由して光学単ファイバ２６に入射したレーザ光は、光学単ファイバ２６の先端面２６ａから射出されて拡大観察用観察窓１５の表面付近の焦点位置で被写体に当たって反射され、その反射光が光学単ファイバ２６の先端面２６ａに焦点を結んで入射し、光学単ファイバ２６内を通って受光素子６２に入射する。   The laser light incident on the optical single fiber 26 from the laser light source 61 via the optical coupler 63 is emitted from the distal end surface 26 a of the optical single fiber 26, hits the subject at a focal position near the surface of the observation window 15 for magnified observation, and is reflected. Then, the reflected light is focused on the tip surface 26 a of the optical single fiber 26 and enters the light receiving element 62 through the optical single fiber 26.

光学単ファイバ２６の先端面２６ａを走査する走査機構２７の動作制御は同期制御回路６５によって行われており、さらに受光素子６２からの出力信号が光学単ファイバ２６の先端面２６ａの動きと同期して映像信号処理回路６４で画像化されてその映像信号が拡大像モニタ１０に出力され、拡大観察用観察窓１５の表面付近の被写体の１ｍｍ以下程度の領域の顕微鏡的拡大観察像が拡大像モニタ１０に表示される。   The operation control of the scanning mechanism 27 that scans the distal end surface 26a of the optical single fiber 26 is performed by a synchronization control circuit 65, and the output signal from the light receiving element 62 is synchronized with the movement of the distal end surface 26a of the optical single fiber 26. The image signal is converted into an image by the video signal processing circuit 64 and the video signal is output to the magnified image monitor 10. 10 is displayed.

また、ビデオプロセッサ５内に配置された二つのイメージガイドファイババンドル３２Ａ，３２Ｂの射出端面に面して、その射出端像の投影位置に各々固体撮像素子５４Ａ，５４Ｂが配置されている。   Further, the solid-state imaging devices 54A and 54B are arranged at the projection positions of the exit end images facing the exit end faces of the two image guide fiber bundles 32A and 32B disposed in the video processor 5, respectively.

前出の副映像信号処理回路５５は、その二つの固体撮像素子５４Ａ，５４Ｂで撮像された撮像信号を処理して映像信号をメインモニタ９に出力するものであり、二つの補助観察用観察窓１４Ａ，１４Ｂから取り込まれた通常観察像が、通常観察用観察窓１２から取り込まれた通常観察像と並んでメインモニタ９に表示される。   The sub-video signal processing circuit 55 described above processes the image signals picked up by the two solid-state image pickup devices 54A and 54B and outputs the image signals to the main monitor 9, and has two observation windows for auxiliary observation. The normal observation images captured from 14A and 14B are displayed on the main monitor 9 along with the normal observation images captured from the normal observation observation window 12.

図５は、そのようにしてメインモニタ９に表示される、二つの補助観察用観察窓１４Ａ，１４Ｂから取り込まれた通常観察像９Ａ，９Ｂの状態を示しており、二つの通常観察像９Ａ，９Ｂが並べて表示されるだけでなく、二つの通常観察像９Ａ，９Ｂにおいて同じ被写体を観察している領域９ＡＢでは、その通常観察像がメインモニタ９の同じ位置に重複して表示されるようになっている。   FIG. 5 shows the states of the normal observation images 9A and 9B captured from the two auxiliary observation observation windows 14A and 14B displayed on the main monitor 9 as described above. 9B is displayed side by side, and in the region 9AB where the same subject is observed in the two normal observation images 9A and 9B, the normal observation image is displayed in the same position on the main monitor 9 in an overlapping manner. It has become.

そのようにして、二つの補助観察用観察窓１４Ａ，１４Ｂを通して得られる二つの通常観察像９Ａ，９Ｂの重複領域９ＡＢは、拡大観察用観察窓１５の前方数ｍｍ程度の近接位置の、やや解像度が低いが通常の（即ち、顕微鏡的拡大観察ではない）観察像である。   In this way, the overlapping region 9AB of the two normal observation images 9A and 9B obtained through the two auxiliary observation observation windows 14A and 14B has a slight resolution at a close position of about several millimeters ahead of the magnification observation observation window 15. Is a normal (ie, not microscopic magnified) observation image.

したがって、拡大観察用観察窓１５を通して拡大観察用観察窓１５の表面付近の被写体の顕微鏡的拡大観察を行う直前に、補助観察用観察窓１４Ａ，１４Ｂを通して得られた二つの通常観察像９Ａ，９Ｂの重複領域９ＡＢを見ることにより、顕微鏡的拡大観察の対象部位を通常観察像で確認することができ、通常観察用観察窓１２を通して行われたスクリーニング検査により異常が疑われた部位に対して確実に顕微鏡的拡大観察を行うことができる。   Accordingly, the two normal observation images 9A and 9B obtained through the auxiliary observation observation windows 14A and 14B immediately before performing the microscopic magnification observation of the subject near the surface of the enlargement observation observation window 15 through the magnification observation observation window 15. By looking at the overlapping area 9AB, the target part of the microscopic magnified observation can be confirmed with a normal observation image, and the part that is suspected of being abnormal by the screening examination conducted through the observation window 12 for normal observation is surely observed. Microscopic observation can be performed.

なお、本発明は上記実施例に限定されるものではなく、例えば補助観察用観察窓１４Ａ，１４Ｂが拡大観察用観察窓１５の周囲に３個以上配置されていても差し支えない。   The present invention is not limited to the above-described embodiment, and for example, three or more auxiliary observation observation windows 14A and 14B may be arranged around the observation observation window 15 for magnification observation.

本発明の実施例の拡大観察用内視鏡装置のシステム構成を示すブロック図である。It is a block diagram which shows the system configuration | structure of the endoscope apparatus for magnification observation of the Example of this invention. 本発明の実施例の拡大観察用内視鏡装置のシステム全体の略示図である。It is a schematic diagram of the whole system of the endoscope apparatus for magnification observation of the example of the present invention. 本発明の実施例の拡大観察用内視鏡装置の挿入部の最先端部分の斜視図である。It is a perspective view of the most advanced part of the insertion part of the endoscope apparatus for magnification observation of the example of the present invention. 本発明の実施例の拡大観察用内視鏡装置の挿入部の最先端部分の側面断面図である。It is side surface sectional drawing of the most advanced part of the insertion part of the endoscope apparatus for magnification observation of the Example of this invention. 本発明の実施例の拡大観察用内視鏡装置の補助観察用観察窓を通して得られた通常観察像の表示状態を示す略示図である。It is a schematic diagram which shows the display state of the normal observation image obtained through the observation window for auxiliary observation of the endoscope apparatus for magnification observation of the Example of this invention.

符号の説明Explanation of symbols

１ 挿入部
９ メインモニタ
９Ａ，９Ｂ 通常観察像
９ＡＢ 重複領域（同じ被写体を観察している領域）
１２ 通常観察用観察窓
１４Ａ，１４Ｂ 補助観察用観察窓
１５ 拡大観察用観察窓
２５ 共焦点光学系
２６ 光学単ファイバ
２６ａ 先端面
２７ 走査機構
３１Ａ，３１Ｂ 対物レンズ
３２Ａ，３２Ｂ イメージガイドファイババンドル
５５ 副映像信号処理回路 1 Insertion section 9 Main monitor 9A, 9B Normal observation image 9AB Overlapping area (area where the same subject is observed)
12 Observation window for normal observation 14A, 14B Observation window for auxiliary observation 15 Observation window for magnification observation 25 Confocal optical system 26 Optical single fiber 26a End face 27 Scanning mechanism 31A, 31B Objective lens 32A, 32B Image guide fiber bundle 55 Sub-picture Signal processing circuit

Claims (5)

被写体の通常観察像を上記被写体との間に距離をおいた位置から取り込むための通常観察用観察窓と、上記被写体の表面に当接又は極近接されて上記被写体の拡大観察像を取り込むための拡大観察用観察窓とが併設された拡大観察用内視鏡装置において、
上記拡大観察用観察窓の外縁部に隣接して上記拡大観察用観察窓を間に挟んだ位置関係の少なくとも二箇所に、上記拡大観察用観察窓の前方近接位置の被写体の通常観察像を取り込むための補助観察用観察窓を設けたことを特徴とする拡大観察用内視鏡装置。 A normal observation observation window for capturing a normal observation image of a subject from a position spaced from the subject, and a magnified observation image of the subject in contact with or in close proximity to the surface of the subject In an endoscope apparatus for magnification observation provided with an observation window for magnification observation,
The normal observation image of the subject at a position close to the front of the observation window for magnification observation is taken into at least two positions in the positional relationship between the observation window for magnification observation adjacent to the outer edge of the observation window for magnification observation. An endoscope apparatus for magnifying observation, characterized in that an observation window for auxiliary observation is provided. 上記少なくとも二つの補助観察用観察窓から取り込まれた複数の通常観察像を並べて表示するモニタが設けられている請求項１記載の拡大観察用内視鏡装置。   The endoscope apparatus for magnifying observation according to claim 1, further comprising a monitor that displays a plurality of normal observation images captured from the at least two auxiliary observation observation windows side by side. 上記少なくとも二つの補助観察用観察窓から取り込まれた複数の通常観察像において同じ被写体を観察している領域では、その通常観察像が上記モニタの同じ位置に重複して表示される請求項２記載の拡大観察用内視鏡装置。   The normal observation image is overlapped and displayed at the same position on the monitor in a region where the same subject is observed in a plurality of normal observation images captured from the at least two auxiliary observation observation windows. Endoscope apparatus for magnification observation. 上記補助観察用観察窓から取り込まれた通常観察像がイメージガイドファイババンドルにより伝送されて、そのイメージガイドファイババンドルの射出端面の像が撮像素子に投影されて撮像される請求項１、２又は３記載の拡大観察用内視鏡装置。   The normal observation image taken from the observation window for auxiliary observation is transmitted by an image guide fiber bundle, and an image of the exit end face of the image guide fiber bundle is projected onto an image sensor and captured. The endoscope apparatus for magnification observation as described. 上記拡大観察用観察窓内には、光軸に垂直な２次元方向に走査される光学単ファイバの先端面の位置と上記拡大観察用観察窓の表面付近の位置とを共焦点の位置関係に配置した共焦点光学系が設けられている請求項１ないし４のいずれかの項に記載の拡大観察用内視鏡装置。   In the observation window for magnification observation, the position of the tip surface of the optical single fiber scanned in a two-dimensional direction perpendicular to the optical axis and the position near the surface of the observation window for magnification observation are in a confocal positional relationship. The endoscope apparatus for magnification observation according to any one of claims 1 to 4, wherein a confocal optical system is provided.
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