JP4520212B2 - End of the endoscope - Google Patents

End of the endoscope Download PDF

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JP4520212B2
JP4520212B2 JP2004132287A JP2004132287A JP4520212B2 JP 4520212 B2 JP4520212 B2 JP 4520212B2 JP 2004132287 A JP2004132287 A JP 2004132287A JP 2004132287 A JP2004132287 A JP 2004132287A JP 4520212 B2 JP4520212 B2 JP 4520212B2
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light guide
hole
distal end
arrangement hole
illumination
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JP2005312563A (en
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和之 山本
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Hoya Corp
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Hoya Corp
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この発明は内視鏡の先端部に関する。   The present invention relates to a distal end portion of an endoscope.

内視鏡の挿入部先端においては、一般に、先端部本体の先端面に形成された照明窓に照明用カバーレンズが取り付けられて、その内側にライトガイドファイババンドルの射出端面が配置されている。   At the distal end of the insertion portion of the endoscope, generally, an illumination cover lens is attached to an illumination window formed on the distal end surface of the distal end portion main body, and an emission end surface of the light guide fiber bundle is disposed inside the illumination cover lens.

そのような照明窓に照明用カバーレンズを固定する場合に、照明用カバーレンズを照明窓に単純に接着固定しただけでは、滅菌ガス等による消毒滅菌が繰り返された時に固定強度が次第に不十分になって、照明用カバーレンズが脱落する恐れが生じる。   When fixing an illumination cover lens to such an illumination window, simply fixing the illumination cover lens to the illumination window will cause the fixation strength to gradually become insufficient when disinfection and sterilization with sterilization gas is repeated. As a result, the cover lens for illumination may fall off.

そこで従来は、先端部本体の照明窓孔に照明用カバーレンズを嵌め込んで接着固定する際に、照明用カバーレンズの外縁部分が照明窓孔の内面部分に対して先端部本体の内側から外方に向かって押し付けられた状態に取り付けられるようにしている（例えば、特許文献１）。
特開２００２−８５３２６ Therefore, conventionally, when the illumination cover lens is fitted and fixed in the illumination window hole of the tip body, the outer edge portion of the illumination cover lens is exposed from the inside of the tip body to the inner surface portion of the illumination window hole. It is made to attach in the state pressed toward the direction (for example, patent document 1).
JP 2002-85326 A

上述のような従来の内視鏡の先端部においては、先端部本体に後方から穿設されたライトガイド配置孔の先端部分に照明窓孔が形成されており、組み立て接着時には、照明用カバーレンズをライトガイド配置孔内から照明窓孔に押し付けながら接着剤を乾燥させる必要がある。   In the distal end portion of the conventional endoscope as described above, an illumination window hole is formed at the distal end portion of the light guide arrangement hole drilled from the rear in the distal end portion main body. It is necessary to dry the adhesive while pressing against the illumination window hole from within the light guide arrangement hole.

そこで従来は、ライトガイド配置孔に後方から差し込んだライトガイドファイババンドルの射出端部で照明用カバーレンズを押圧した状態で接着剤を乾燥させていたが、そのようにすると、僅か１ｃｍ程度の大きさの先端部本体部分に対して数メートルの長さに及ぶライトガイドファイババンドルバンドルを引きずった状態になるため、接着剤の乾燥の際の作業性が非常に悪くなってしまう。   Therefore, in the past, the adhesive was dried in a state where the illumination cover lens was pressed at the exit end of the light guide fiber bundle inserted into the light guide arrangement hole from behind, but in that case, the size of the adhesive was only about 1 cm. Since the light guide fiber bundle bundle extending several meters long is dragged with respect to the tip portion main body portion, the workability at the time of drying the adhesive is extremely deteriorated.

そこで、ライトガイド配置孔に後方から単独筒状部材を嵌挿して、その単独筒状部材の先端を照明用カバーレンズの後面に押し付けて接着剤を乾燥させ、乾燥後に、単独筒状部材内に後方からライトガイドファイババンドルの射出端部を差し込み固定する構造を採ることが考えられる。   Therefore, a single cylindrical member is inserted into the light guide arrangement hole from the rear, the tip of the single cylindrical member is pressed against the rear surface of the illumination cover lens, and the adhesive is dried. It is conceivable to adopt a structure in which the exit end of the light guide fiber bundle is inserted and fixed from the rear.

しかし、そのような構成を採ると、単独筒状部材の肉厚分だけライトガイド配置孔の径を大きくする必要があり、そのために先端部本体を太くすると、内視鏡検査を受ける人に与える苦痛を大きくしてしまうことになる。   However, if such a configuration is adopted, it is necessary to increase the diameter of the light guide arrangement hole by the thickness of the single cylindrical member. For this reason, if the tip body is made thicker, it is given to a person undergoing endoscopy. It will increase the pain.

そこで本発明は、ライトガイドファイババンドルを取り付けることなく照明窓孔に照明用カバーレンズを確実に接合固定することができ、しかも先端部本体が太くならず、内視鏡検査を受ける人に与える苦痛を増大させない内視鏡の先端部を提供することを目的とする。   Therefore, the present invention is capable of reliably joining and fixing the illumination cover lens to the illumination window hole without attaching the light guide fiber bundle, and the distal end main body does not become thick, and is a pain given to a person undergoing endoscopy. An object of the present invention is to provide a distal end portion of an endoscope that does not increase the length.

上記の目的を達成するため、本発明の内視鏡の先端部は、挿入部先端の先端部本体に後方から穿設されたライトガイド配置孔の先端部分に照明窓孔が形成されて、照明窓孔の内側に照明用カバーレンズが配置され、ライトガイド配置孔内に後方からライトガイドファイババンドルの射出端部が差し込み固定されるように構成された内視鏡の先端部において、ライトガイド配置孔に後方から単独筒状部材が嵌挿され、その単独筒状部材の先端が照明用カバーレンズの後面に押し付け固定されて、単独筒状部材内に後方からライトガイドファイババンドルの射出端部が嵌挿固定される構成であって、ライトガイド配置孔が、ライトガイド配置孔と並んで先端部本体に穿設されている内蔵物配置孔と部分的に干渉する状態に形成されると共に、単独筒状部材が、ライトガイド配置孔の内蔵物配置孔と干渉する部分に合わせて切り欠かれているものである。   In order to achieve the above object, the distal end portion of the endoscope of the present invention has an illumination window hole formed at the distal end portion of the light guide arrangement hole formed in the distal end main body at the distal end of the insertion portion from the rear side. An illumination cover lens is arranged inside the window hole, and the light guide arrangement is arranged at the distal end portion of the endoscope configured so that the emission end portion of the light guide fiber bundle is inserted and fixed from the rear into the light guide arrangement hole. A single cylindrical member is inserted into the hole from the rear, the tip of the single cylindrical member is pressed against the rear surface of the illumination cover lens, and the exit end of the light guide fiber bundle is inserted into the single cylindrical member from the rear. The light guide arrangement hole is formed in a state of partially interfering with the built-in object arrangement hole formed in the tip body along with the light guide arrangement hole. Jo member, is what is notched to fit the internals arrangement hole and interferes with part of the light guide arrangement hole.

本発明によれば、ライトガイド配置孔に後方から嵌挿される単独筒状部材により照明用カバーレンズが押圧されて固定されるので、ライトガイドファイババンドルを取り付けることなく照明窓孔に照明用カバーレンズを確実に接合固定することができ、先端部本体にライトガイド配置孔と並んで穿設された内蔵物配置孔とライトガイド配置孔とが部分的に干渉する状態に形成されているので、先端部本体が太くならず、内視鏡検査を受ける人に与える苦痛を増大させないという格別の効果を奏する。   According to the present invention, since the illumination cover lens is pressed and fixed by the single cylindrical member inserted from behind into the light guide arrangement hole, the illumination cover lens is installed in the illumination window hole without attaching the light guide fiber bundle. The built-in object arrangement hole and the light guide arrangement hole drilled alongside the light guide arrangement hole in the tip body are formed in a state where the light guide arrangement hole partially interferes. The body of the head does not become thick, and there is an extraordinary effect that does not increase the pain given to the person undergoing endoscopy.

挿入部先端の先端部本体に後方から穿設されたライトガイド配置孔の先端部分に照明窓孔が形成されて、照明窓孔の内側に照明用カバーレンズが配置され、ライトガイド配置孔内に後方からライトガイドファイババンドルの射出端部が差し込み固定されるように構成された内視鏡の先端部において、ライトガイド配置孔に後方から単独筒状部材が嵌挿され、その単独筒状部材の先端が照明用カバーレンズの後面に押し付け固定されて、単独筒状部材内に後方からライトガイドファイババンドルの射出端部が嵌挿固定される構成であって、ライトガイド配置孔が、ライトガイド配置孔と並んで先端部本体に穿設されている内蔵物配置孔と部分的に干渉する状態に形成されると共に、単独筒状部材が、ライトガイド配置孔の内蔵物配置孔と干渉する部分に合わせて切り欠かれている。   An illumination window hole is formed at the distal end portion of the light guide arrangement hole drilled from the rear in the distal end main body at the distal end of the insertion section, and an illumination cover lens is arranged inside the illumination window hole, and in the light guide arrangement hole. At the distal end of the endoscope that is configured so that the exit end of the light guide fiber bundle is inserted and fixed from the rear, a single cylindrical member is fitted into the light guide arrangement hole from the rear, and the single cylindrical member The tip is pressed and fixed to the rear surface of the illumination cover lens, and the exit end of the light guide fiber bundle is inserted and fixed from behind in a single cylindrical member, and the light guide arrangement hole has the light guide arrangement. It is formed in a state of partially interfering with the built-in object arrangement hole formed in the tip body along with the hole, and the single cylindrical member interferes with the built-in object arrangement hole of the light guide arrangement hole. It is notched to fit the part.

図面を参照して本発明の実施例を説明する。
図３は、本発明が適用される内視鏡の挿入部１の先端に配置されている先端部本体１の先端面を示しており、観察窓３と照明窓４とが並んで配置されると共に、処置具突出口（兼吸引口）９が開口している。観察窓３の奥には、矩形状の固体撮像素子６が内蔵されている。 Embodiments of the present invention will be described with reference to the drawings.
FIG. 3 shows the distal end surface of the distal end main body 1 arranged at the distal end of the insertion portion 1 of the endoscope to which the present invention is applied, and the observation window 3 and the illumination window 4 are arranged side by side. At the same time, a treatment instrument protruding port (also a suction port) 9 is opened. A rectangular solid-state imaging device 6 is built in the back of the observation window 3.

図４は、観察窓３を含む側面断面と照明窓４を含む側面断面とを複合して図示しており、観察窓３の奥には対物光学系５が配置されていて、対物光学系５の第１レンズ５ａが観察窓３に取り付けられている。   FIG. 4 shows a composite of a side cross section including the observation window 3 and a side cross section including the illumination window 4. An objective optical system 5 is disposed behind the observation window 3. The first lens 5 a is attached to the observation window 3.

固体撮像素子６は、先端部本体２に軸線と平行方向に穿設されている対物枠配置孔２０（内蔵物配置孔）内の、対物光学系５による被写体の投影位置に配置されていて、信号ケーブル７がその後方に引き通されている。   The solid-state imaging device 6 is disposed at a projection position of a subject by the objective optical system 5 in an objective frame arrangement hole 20 (built-in object arrangement hole) drilled in the distal end body 2 in a direction parallel to the axis. A signal cable 7 is routed behind it.

１０は、照明窓４と位置を合わせて、先端部本体２に後方から軸線と平行方向に穿設されたライトガイド配置孔であり、照明用カバーレンズ１２を嵌め込んで接着固定するための照明窓孔１１が、ライトガイド配置孔１０の最先端部分に形成されている。   Reference numeral 10 denotes a light guide arrangement hole which is aligned with the illumination window 4 and is drilled in the distal end portion body 2 from the rear in a direction parallel to the axis, and is used for fitting and fixing the illumination cover lens 12 by bonding. A window hole 11 is formed in the most distal portion of the light guide arrangement hole 10.

そのようなライトガイド配置孔１０と対物枠配置孔２０は、先端部本体２の軸線と垂直方向の断面を図示する図５に示されるように、二つのライトガイド配置孔１０が対物枠配置孔２０を挟む位置関係で、先端部本体２に軸線方向に平行に並んで穿設されていて、部分的にライトガイド配置孔１０と対物枠配置孔２０とが干渉してつながった状態に形成されている。そのようにすることにより、先端部本体２の外径が太くなることが抑制されている。   Such a light guide arrangement hole 10 and the objective frame arrangement hole 20 have two light guide arrangement holes 10 as the objective frame arrangement hole, as shown in FIG. 5 illustrating a cross section perpendicular to the axis of the tip body 2. 20 is formed in a state in which the light guide arrangement hole 10 and the objective frame arrangement hole 20 are partially connected to each other by being drilled in the tip body 2 in parallel with the axial direction. ing. By doing so, it is suppressed that the outer diameter of the front-end | tip part main body 2 becomes thick.

図４に戻って、照明窓孔１１は先細りのテーパ孔状に形成されていて、照明用カバーレンズ１２もそのような照明窓孔１１にピッタリと嵌まり込む先細りのテーパ状に形成されている。   Returning to FIG. 4, the illumination window hole 11 is formed in a tapered taper shape, and the illumination cover lens 12 is also formed in a tapered shape that fits in the illumination window hole 11 exactly. .

したがって、照明用カバーレンズ１２の外周面が照明窓孔１１の内周面に対して先端部本体２の内側から外方（即ち、後方から前方）に向かって押し付けられた状態に取り付けられている。   Accordingly, the outer peripheral surface of the illumination cover lens 12 is attached to the inner peripheral surface of the illumination window hole 11 so as to be pressed outward from the inside of the tip body 2 (ie, from the rear to the front). .

１３は、照明用カバーレンズ１２を照明窓孔１１に固定する組み立て工程の際に単独の部品として用いられる円筒形状の単独筒状部材であり、ライトガイド配置孔１０に対して嵌合する状態に後方から差し込まれて、その先端面が照明用カバーレンズ１２の後面に押し付けられた状態で先端部本体２に固定されている。   13 is a cylindrical single cylindrical member used as a single component in the assembly process for fixing the illumination cover lens 12 to the illumination window hole 11, and is fitted in the light guide arrangement hole 10. Inserted from the rear, the front end surface is fixed to the front end portion body 2 in a state where the front end surface is pressed against the rear surface of the illumination cover lens 12.

そして、ライトガイドファイババンドル１４の射出端部がライトガイド配置孔１０に後方から差し込まれてそこに固定されている。１４ａと１４ｂは、ライトガイドファイババンドル１４の口金と被覆チューブである。   Then, the exit end of the light guide fiber bundle 14 is inserted into the light guide arrangement hole 10 from behind and is fixed thereto. Reference numerals 14 a and 14 b denote a cap and a covering tube of the light guide fiber bundle 14.

図１は、固体撮像素子６を含む断面における先端部本体２の正面断面図であり、固体撮像素子６は対物枠配置孔２０内に配置されている。そして、ライトガイド配置孔１０内に嵌挿されている単独筒状部材１３は、外面が正円形の断面形状だと固体撮像素子６側と干渉してしまうので、単独筒状部材１３は、ライトガイド配置孔１０が対物枠配置孔２０と干渉する部分に合わせて切り欠かれている。   FIG. 1 is a front cross-sectional view of the distal end main body 2 in a cross section including the solid-state image sensor 6, and the solid-state image sensor 6 is disposed in the objective frame arrangement hole 20. Since the single cylindrical member 13 fitted in the light guide arrangement hole 10 interferes with the solid-state imaging device 6 side when the outer surface has a regular circular cross-sectional shape, the single cylindrical member 13 The guide arrangement hole 10 is cut out in accordance with a portion that interferes with the objective frame arrangement hole 20.

１３ａがその切り欠き部であり、図２に示されるように、単独筒状部材１３の全長にわたって切り欠き部１３ａが形成されている。１３ｂは、単独筒状部材１３がライトガイド配置孔１０内において軸線回りに回転しないように回転方向の位置決めをするための平面部である。   13a is the notch, and the notch 13a is formed over the entire length of the single cylindrical member 13, as shown in FIG. 13 b is a plane portion for positioning in the rotational direction so that the single cylindrical member 13 does not rotate around the axis in the light guide arrangement hole 10.

このような構成の内視鏡の挿入部先端において、照明窓孔１１に照明用カバーレンズ１２を固定する際には、まず図６に示されるように、照明窓孔１１の内側位置に照明用カバーレンズ１２を配置して、照明用カバーレンズ１２の外周面と照明窓孔１１の内周面との接触面に接着剤を塗布し、ライトガイド配置孔１０に後方から単独筒状部材１３を差し込んで、単独筒状部材１３の先端面で照明用カバーレンズ１２の後面を押圧する。   When the illumination cover lens 12 is fixed to the illumination window hole 11 at the distal end of the insertion portion of the endoscope having such a configuration, first, as shown in FIG. The cover lens 12 is arranged, an adhesive is applied to the contact surface between the outer peripheral surface of the illumination cover lens 12 and the inner peripheral surface of the illumination window hole 11, and the single cylindrical member 13 is attached to the light guide arrangement hole 10 from the rear. Then, the rear surface of the illumination cover lens 12 is pressed with the tip surface of the single cylindrical member 13.

単独筒状部材１３が照明用カバーレンズ１２に後方から押し付けられた状態を保つためには、単独筒状部材１３を先端部本体２に固定する必要があるので、固定用ネジ１５を先端部本体２に取り付けてもよく、或いはテープやバンドその他の手段により単独筒状部材１３を先端部本体２に固定してもよい。   In order to keep the single cylindrical member 13 pressed against the illumination cover lens 12 from the rear, it is necessary to fix the single cylindrical member 13 to the distal end body 2, so the fixing screw 15 is attached to the distal end body. The single cylindrical member 13 may be fixed to the distal end body 2 by a tape, a band or other means.

そのようにして、照明用カバーレンズ１２が照明窓孔１１に強固に接着固定されたら、図７に示されるように、ライトガイドファイババンドル１４の射出端部を単独筒状部材１３に後方から差し込んで固定する。その固定手段は接着或いは固定ネジのどちらであっても差し支えない。   Thus, when the illumination cover lens 12 is firmly bonded and fixed to the illumination window hole 11, the exit end of the light guide fiber bundle 14 is inserted into the single cylindrical member 13 from the rear as shown in FIG. Secure with. The fixing means may be either an adhesive or a fixing screw.

このようにして、ライトガイドファイババンドル１４の取り付けは照明用カバーレンズ１２を照明窓孔１１に固定する接着剤の乾燥硬化工程が完了した後になるので、乾燥硬化工程がライトガイドファイババンドル１４の品質に全く悪影響を及ぼさない。   In this way, the light guide fiber bundle 14 is attached after the drying and curing process of the adhesive for fixing the illumination cover lens 12 to the illumination window hole 11 is completed. Will not have any adverse effect.

なお、本発明は上記実施例に限定されるものではなく、例えばライトガイド配置孔１０と干渉する相手は、対物枠配置孔２０に限らず他の内蔵物配置孔であっても差し支えない。   In addition, this invention is not limited to the said Example, For example, the other party which interferes with the light guide arrangement | positioning hole 10 may not be the objective frame arrangement | positioning hole 20, but another built-in thing arrangement | positioning hole.

本発明の実施例の内視鏡の先端部の固体撮像素子を含む位置における正面断面図である。It is front sectional drawing in the position containing the solid-state image sensor of the front-end | tip part of the endoscope of the Example of this invention. 本発明の実施例の内視鏡の先端部の単独筒状部材の斜視図である。It is a perspective view of the single cylindrical member of the front-end | tip part of the endoscope of the Example of this invention. 本発明の実施例の内視鏡の先端部の正面図である。It is a front view of the front-end | tip part of the endoscope of the Example of this invention. 本発明の実施例の内視鏡の先端部の複合側面断面図である。It is compound side surface sectional drawing of the front-end | tip part of the endoscope of the Example of this invention. 本発明の実施例の内視鏡の先端部の先端部本体の正面断面図である。It is front sectional drawing of the front-end | tip part main body of the front-end | tip part of the endoscope of the Example of this invention. 本発明の実施例の内視鏡の先端部の組立工程を示す複合側面断面図である。It is a compound side surface sectional view showing the assembly process of the tip part of the endoscope of the example of the present invention. 本発明の実施例の内視鏡の先端部の組立工程を示す複合側面断面図である。It is a compound side surface sectional view showing the assembly process of the tip part of the endoscope of the example of the present invention.

符号の説明Explanation of symbols

１ 挿入部
２ 先端部本体
４ 照明窓
６ 固体撮像素子
１０ ライトガイド配置孔
１１ 照明窓孔
１２ 照明用カバーレンズ
１３ 単独筒状部材
１３ａ 切り欠き部
１４ ライトガイドファイババンドル
２０ 対物枠配置孔（内蔵物配置孔） DESCRIPTION OF SYMBOLS 1 Insertion part 2 Front-end | tip part body 4 Illumination window 6 Solid-state image sensor 10 Light guide arrangement hole 11 Illumination window hole 12 Illumination cover lens 13 Single cylindrical member 13a Notch part 14 Light guide fiber bundle 20 Objective frame arrangement hole (built-in thing) Placement hole)

Claims (1)

挿入部先端の先端部本体に後方から穿設されたライトガイド配置孔の先端部分に照明窓孔が形成されて、上記照明窓孔の内側に照明用カバーレンズが配置され、上記ライトガイド配置孔内に後方からライトガイドファイババンドルの射出端部が差し込み固定されるように構成された内視鏡の先端部において、
上記ライトガイドファイババンドルから独立して単独の円筒状に形成された単独筒状部材が上記ライトガイド配置孔に後方から単独で嵌挿され、その単独筒状部材が上記照明用カバーレンズの後面に押し付けられた状態で上記先端部本体に固定された後に、上記単独筒状部材内に後方からライトガイドファイババンドルの射出端部が嵌挿固定される構成であって、
上記ライトガイド配置孔が、上記ライトガイド配置孔と並んで上記先端部本体に穿設されている内蔵物配置孔と部分的に重なり合って穿孔する状態に形成されると共に、上記ライトガイド配置孔が上記内蔵物配置孔と重なり合う部分に合わせて上記単独筒状部材が切り欠かれ、その切り欠き部が上記単独筒状部材を穿孔していない、
ことを特徴とする内視鏡の先端部。 An illumination window hole is formed at the distal end portion of the light guide arrangement hole drilled from the rear in the distal end main body at the distal end of the insertion section, an illumination cover lens is arranged inside the illumination window hole, and the light guide arrangement hole In the distal end portion of the endoscope configured so that the exit end portion of the light guide fiber bundle is inserted and fixed from behind in the inside,
Rear surface of the light guide independent of the fiber bundle single cylindrically formed a single tubular member is fitted solely from the rear to the light guide arrangement hole, its sole tubular member is the illumination cover lens After being fixed to the tip end body in a state of being pressed to, the exit end portion of the light guide fiber bundle is inserted and fixed from behind in the single cylindrical member,
It said light guide arranged hole is formed in a state of piercing the light guide arranged holes side by side with the distal end portion main body is built-in arrangement hole and partially overlapping are formed in it, the upper Symbol light guide disposed holes There the single tubular member is cut to fit the portion overlapping with the internals disposition hole, the notch portion is not perforated the single tubular member,
An endoscope tip characterized by the above.
JP2004132287A 2004-04-28 2004-04-28 End of the endoscope Expired - Fee Related JP4520212B2 (en)

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB201113066D0 (en) 2011-07-29 2011-09-14 Univ Bristol Optical device

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04338444A (en) * 1991-05-14 1992-11-25 Asahi Optical Co Ltd Tip of endoscope
JPH04358114A (en) * 1991-04-26 1992-12-11 Asahi Optical Co Ltd Tip part of front view type electron endoscope
JPH11313796A (en) * 1999-02-04 1999-11-16 Olympus Optical Co Ltd Endoscope
JP2000037343A (en) * 1998-07-24 2000-02-08 Olympus Optical Co Ltd Endoscope system
JP2001091859A (en) * 1999-09-20 2001-04-06 Olympus Optical Co Ltd Image guide fiber
JP2002272671A (en) * 2001-03-14 2002-09-24 Fuji Photo Optical Co Ltd Endoscope

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04358114A (en) * 1991-04-26 1992-12-11 Asahi Optical Co Ltd Tip part of front view type electron endoscope
JPH04338444A (en) * 1991-05-14 1992-11-25 Asahi Optical Co Ltd Tip of endoscope
JP2000037343A (en) * 1998-07-24 2000-02-08 Olympus Optical Co Ltd Endoscope system
JPH11313796A (en) * 1999-02-04 1999-11-16 Olympus Optical Co Ltd Endoscope
JP2001091859A (en) * 1999-09-20 2001-04-06 Olympus Optical Co Ltd Image guide fiber
JP2002272671A (en) * 2001-03-14 2002-09-24 Fuji Photo Optical Co Ltd Endoscope

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