JPH09285440A - Protection cover type endoscope apparatus - Google Patents
Protection cover type endoscope apparatusInfo
- Publication number
- JPH09285440A JPH09285440A JP8102197A JP10219796A JPH09285440A JP H09285440 A JPH09285440 A JP H09285440A JP 8102197 A JP8102197 A JP 8102197A JP 10219796 A JP10219796 A JP 10219796A JP H09285440 A JPH09285440 A JP H09285440A
- Authority
- JP
- Japan
- Prior art keywords
- transparent member
- protective cover
- optical system
- type endoscope
- cover type
- 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.)
- Ceased
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】 本願発明は、保護カバー式
内視鏡装置に関する。TECHNICAL FIELD The present invention relates to a protective cover type endoscope apparatus.
【０００２】[0002]
【従来の技術】 人体内部の観察，治療に用いる内視鏡
装置のうち、いわゆる保護カバー式内視鏡装置が従来よ
り提案されている。これは人体内に挿入される挿入部お
よび先端構成部を被覆し得る保護カバーを内視鏡本体に
取り付けておき、使用によって体液等が付着した場合、
清浄な保護カバーに取り替えて使用済み保護カバーは廃
棄するようにして、洗浄・消毒の手間を省くようにした
ものである。2. Description of the Related Art Among endoscope devices used for observing and treating the inside of a human body, a so-called protective cover type endoscope device has been conventionally proposed. This is because a protective cover that can cover the insertion part and the tip forming part to be inserted into the human body is attached to the endoscope main body, and when body fluid or the like adheres due to use,
The used protective cover is replaced with a clean protective cover, and the used protective cover is discarded to save the trouble of cleaning and disinfecting.
【０００３】そして、照明光学系からの不要光が観察光
学系に侵入してゴースト，フレアを起こすのを防止する
ために、特開平３−２２１０２４号公報，特開平７−１
１３９６２号公報によれば、保護カバーの先端面に設け
られた透明部材のうち、照明光学系に対向する部分と観
察光学系に対向する部分とを隔てるように前記透明部材
に遮光部材を設けるか、あるいは、照明光学系と観察光
学系とを隔てるように内視鏡本体の先端面に遮光壁を設
けたものが提案されている。In order to prevent unnecessary light from the illumination optical system from invading the observation optical system and causing ghost and flare, Japanese Patent Laid-Open Nos. Hei 3-221024 and Hei 7-1.
According to Japanese Patent No. 13962, is a transparent member provided on the front end surface of the protective cover provided with a light shielding member on the transparent member so as to separate a portion facing the illumination optical system and a portion facing the observation optical system? Alternatively, it has been proposed that a light-shielding wall is provided on the distal end surface of the endoscope main body so as to separate the illumination optical system and the observation optical system.
【０００４】[0004]
【発明が解決しようとする課題】 しかし上記の従来技
術では、視野周辺部を照明する照明光が透明部材の外周
面や遮光部材によってケラレて、配光が悪くなってしま
う。そこで照明光がケラレるのを防止するために透明部
材の面積を大きくすると、保護カバーの先端面の面積が
大きくなり内視鏡の外径が太径化してしまうという問題
点が考えられる。However, in the above conventional technique, the illumination light for illuminating the peripheral portion of the visual field is vignetted by the outer peripheral surface of the transparent member and the light shielding member, and the light distribution is deteriorated. Therefore, if the area of the transparent member is increased in order to prevent the illumination light from being vignetted, there is a problem in that the area of the front end surface of the protective cover is increased and the outer diameter of the endoscope is increased.
【０００５】本願発明は、このような従来技術の問題点
に鑑み、内視鏡の外径が太径化することなく、照明光が
ケラレずに配光がよい保護カバー式内視鏡を提供するこ
とを目的とする。In view of the above problems of the prior art, the present invention provides a protective cover-type endoscope in which the outer diameter of the endoscope is not increased and the illumination light is not vignetted and the light distribution is good. The purpose is to do.
【０００６】[0006]
【課題を解決するための手段】 本願発明は、照明光学
系を備える内視鏡本体と、透明部材を備え前記内視鏡本
体の少なくとも一部を被覆する保護カバーとを組み合わ
せる保護カバー式内視鏡装置において、前記照明光学系
のライトガイドバンドルの最外周部より射出する平行光
の、前記透明部材の最も被写体側の面での光線高をｈ、
前記透明部材の外周面と前記ライトガイドバンドルの中
心軸との最短距離をｒとしたとき ｈ＜ｒ ・・・（１） を満足することを特徴とする。The present invention provides a protective cover type endoscope in which an endoscope body including an illumination optical system and a protective cover that includes a transparent member and covers at least a part of the endoscope body are combined. In the mirror device, the ray height of the parallel light emitted from the outermost peripheral portion of the light guide bundle of the illumination optical system on the surface of the transparent member closest to the subject is h,
When the shortest distance between the outer peripheral surface of the transparent member and the central axis of the light guide bundle is r, h <r (1) is satisfied.
【０００７】また、前記透明部材が光学的パワーをもつ
ことを特徴とする。また、前記透明部材の被写体側の面
が平面に形成されることを特徴とする。また、前記透明
部材が屈折率分布材質で形成されることを特徴とする。
また、前記透明部材が回折素子であることを特徴とす
る。また、照明光学系を備える内視鏡本体と、透明部材
を備え前記内視鏡本体の少なくとも一部を被覆する保護
カバーとを組み合わせる保護カバー式内視鏡装置におい
て、前記透明部材の外周面が照明光に対して反射率が高
い面で形成されることを特徴とする。The transparent member has an optical power. Further, the surface of the transparent member on the object side is formed to be a flat surface. Further, the transparent member is formed of a material having a refractive index distribution.
Further, the transparent member is a diffraction element. Further, in a protective cover type endoscope apparatus in which an endoscope main body including an illumination optical system and a protective cover including a transparent member and covering at least a part of the endoscope main body are combined, an outer peripheral surface of the transparent member is It is characterized in that it is formed by a surface having a high reflectance for illumination light.
【０００８】また、前記透明部材の外周面および該外周
面と接合する面のうち少なくとも一方が光学面で形成さ
れることを特徴とする。また、前記透明部材が屈折率の
異なる２種類の材質で形成され、前記照明光学系側透明
部材の周縁部分の材質の屈折率をｎ１、前記周縁部分に
囲まれる部分の材質の屈折率をｎ２としたとき ｎ１＜ｎ２ ・・・（２） を満足することを特徴とする。Further, at least one of the outer peripheral surface of the transparent member and the surface joined to the outer peripheral surface is formed of an optical surface. Further, the transparent member is formed of two kinds of materials having different refractive indexes, the refractive index of the material of the peripheral portion of the illumination optical system side transparent member is n 1 , and the refractive index of the material of the portion surrounded by the peripheral portion is When n 2 is satisfied, n 1 <n 2 (2) is satisfied.
【０００９】また、前記透明部材が樹脂で形成されるこ
とを特徴とする。以下に、本願発明に係る保護カバー式
内視鏡装置の作用を説明する。図１は本願発明の保護カ
バー式内視鏡の一例の先端部の断面図を示す。内視鏡本
体１１は照明光学系１２を備え、照明光学系１２はライ
トガイドバンドル１３とレンズ１４を備える。保護カバ
ー１５はその先端部１６のうちレンズ１４に対向する部
分に透明部材１７を備える。図示しない光源からの光は
ライトガイドバンドル１３を介し、レンズ１４によって
集束され照明光学系の透明部材側の面Ｓ １と透明部材の
照明光学系側の面Ｓ２との間に位置する点Ｐで交わり、
発散して透明部材１７を透過し図示しない被写体を照明
する。Further, the transparent member is made of resin.
And features. Below, the protective cover type according to the present invention
The operation of the endoscope device will be described. FIG. 1 shows the protective function of the present invention.
The sectional view of the tip part of an example of a bar type endoscope is shown. Endoscopy book
The body 11 includes an illumination optical system 12, and the illumination optical system 12 is
The guide bundle 13 and the lens 14 are provided. Protective hippo
-15 is a portion of the tip portion 16 facing the lens 14.
In addition, a transparent member 17 is provided. Light from a light source not shown
Through the light guide bundle 13 and the lens 14
Surface S on the transparent member side of the focused and illumination optical system 1And the transparent member
Surface S on the side of the illumination optical system2Intersect at a point P located between
Illuminates an object (not shown) that diverges and transmits through the transparent member 17.
I do.
【００１０】ライトガイドバンドル１３の最外周部より
射出する平行光の、透明部材の最も被写体側の面Ｓ３で
の光線高をｈ、透明部材の外周面１８とライトガイドバ
ンドルの中心軸ｂとの最短距離をｒとしたとき ｈ＜ｒ ・・・（１） を満足するとき、照明光学系１２からの光は透明部材の
外周面１８でケラレることがない。The ray height of the parallel light emitted from the outermost peripheral portion of the light guide bundle 13 on the surface S 3 of the transparent member closest to the subject is h, the outer peripheral surface 18 of the transparent member and the central axis b of the light guide bundle. When r is the shortest distance of, when h <r (1) is satisfied, the light from the illumination optical system 12 is not eclipsed by the outer peripheral surface 18 of the transparent member.
【００１１】図２は本願発明の保護カバー式内視鏡装置
の別の例の先端部の断面図を示す。前記例と共通する部
分は同符号を付し説明を省く。レンズ系２１を射出した
光は点Ｐで交わり、発散する。光の一部は透明部材２２
の外周面２３に入射するが、外周面２３が照明光に対し
て反射率が高い面で形成されているとき、外周面２３で
散乱されずに透明部材２２の被写体側に射出し被写体を
照明する。FIG. 2 is a sectional view of the tip portion of another example of the protective cover type endoscope apparatus of the present invention. The same parts as those in the above example are designated by the same reference numerals, and the description thereof will be omitted. The lights emitted from the lens system 21 intersect at a point P and diverge. Part of the light is transparent 22
When the outer peripheral surface 23 is formed of a surface having a high reflectance with respect to the illumination light, the light is emitted to the object side of the transparent member 22 without being scattered by the outer peripheral surface 23 to illuminate the object. To do.
【００１２】[0012]
【発明の実施の形態】 以下に、本発明の保護カバー式
内視鏡装置の実施の形態１乃至５について、図３乃至８
にもとづいて説明する。 〔実施の形態１〕 図３は本発明の保護カバー式内視鏡
装置の実施の形態１の先端部を被写体の方向から見た
図、図４は図３におけるＡ−Ａ′断面図を示す。保護カ
バー式内視鏡装置４１は内視鏡本体４２に保護カバー４
３が被覆された状態からなっている。内視鏡本体４２に
は照明光学系４４と観察光学系４５とが併設され、保護
カバー４３は先端部４６に照明光学系４４と観察光学系
４５に対向するような透明部材４７を備えている。照明
光学系４４はライトガイドバンドル４８と平凸レンズ４
９を備え、平凸レンズ４９はライトガイドバンドル４８
の射出端面に凸面を向けて配置される。ライトガイドバ
ンドル４８の入射側には図示しない光源が接続される。
観察光学系４５は対物レンズ４Ａと撮像素子４Ｂを備え
ている。さらに、平凸レンズ４９と対物レンズ４Ａとを
隔てるように内視鏡本体の先端面４Ｃに遮光壁４Ｄが設
けられている。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments 1 to 5 of a protective cover type endoscope apparatus of the present invention will be described below with reference to FIGS.
It will be described based on the following. [Embodiment 1] FIG. 3 is a view of a distal end portion of Embodiment 1 of a protective cover type endoscope apparatus of the present invention viewed from the direction of a subject, and FIG. 4 is a sectional view taken along line AA ′ in FIG. . The protective cover type endoscope device 41 includes a protective cover 4 on the endoscope body 42.
3 is covered. An illumination optical system 44 and an observation optical system 45 are provided side by side in the endoscope main body 42, and the protective cover 43 includes a transparent member 47 at the tip portion 46 so as to face the illumination optical system 44 and the observation optical system 45. . The illumination optical system 44 includes the light guide bundle 48 and the plano-convex lens 4.
9 and the plano-convex lens 49 is a light guide bundle 48.
Is arranged with the convex surface facing the exit end surface of. A light source (not shown) is connected to the incident side of the light guide bundle 48.
The observation optical system 45 includes an objective lens 4A and an image sensor 4B. Further, a light shielding wall 4D is provided on the distal end surface 4C of the endoscope body so as to separate the plano-convex lens 49 and the objective lens 4A.
【００１３】透明部材４７は厚さが０．５乃至１ｍｍの
ガラス平板で形成され、そのうち平凸レンズ４９に対向
する部分と対物レンズ４Ａに対向する部分とを隔てるよ
うに透明部材４７と一体に遮光部材４Ｅが設けられてい
る。また、保護カバーは処置具の挿通チャンネル口３１
と送気・送水ノズル３２を備えている。図示しない光源
からの光はライトガイドバンドル４８を介し、平凸レン
ズ４９によって集束され平凸レンズ４９の透明部材側の
平面と透明部材４７の平凸レンズ側の面との間に位置す
る点Ｐで交わり、発散して透明部材４７を透過し図示し
ない被写体を照明する。The transparent member 47 is formed of a glass flat plate having a thickness of 0.5 to 1 mm, and is shielded integrally with the transparent member 47 so as to separate the part facing the plano-convex lens 49 and the part facing the objective lens 4A. A member 4E is provided. In addition, the protective cover is the insertion channel port 31 of the treatment instrument.
And an air / water supply nozzle 32. Light from a light source (not shown) is focused by a plano-convex lens 49 through a light guide bundle 48 and intersects at a point P located between the plane of the plano-convex lens 49 on the transparent member side and the plane of the transparent member 47 on the plano-convex lens side, It diverges and transmits through the transparent member 47 to illuminate a subject (not shown).
【００１４】ライトガイドバンドル４８の最外周部より
射出する平行光の、透明部材の最も被写体側の面での光
線高をｈ、透明部材４７の外周面とライトガイドバンド
ル４８の中心軸との最短距離をｒとしたとき ｈ＜ｒ ・・・（１） を満足するので、平凸レンズ４９を射出した光が透明部
材４７の外周面でケラレずに配光がよい。また、点Ｐが
照明光学系４４の最も透明部材側の平面よりも透明部材
側に位置するので、点Ｐが照明光学系４４の内部に位置
する場合に比べて容易に前記の条件（１）を満足する。
また、透明部材４７は樹脂で形成されてもよい。 〔実施の形態２〕 図５は本発明の保護カバー式内視鏡
の実施の形態２の先端部の断面図を示す。保護カバー式
内視鏡装置５１は内視鏡本体５２に保護カバー５３が被
覆されてなり、内視鏡本体５２には照明光学系５４と観
察光学系５５とが併設され、保護カバー５３は先端面５
６に照明光学系５４と観察光学系５５に対向するような
透明部材５７を備えている。照明光学系５４はライトガ
イドバンドル５８を備えており、ライトガイドバンドル
５８の入射側には図示しない光源が接続される。観察光
学系５５は対物レンズ５Ａと撮像素子５Ｂを備えてい
る。透明部材５７のうちライトガイドバンドル５８の射
出端面に対向する部分は被写体側に平面を向けた平凹レ
ンズ５Ｃに形成されており、これと対物レンズ５Ａに対
向する部分とを隔てるように透明部材５７と一体に遮光
部材５Ｅが設けられている。The ray height of the parallel light emitted from the outermost peripheral portion of the light guide bundle 48 on the most object side surface of the transparent member is h, and the shortest distance between the outer peripheral surface of the transparent member 47 and the central axis of the light guide bundle 48. Since h <r (1) is satisfied when the distance is r, the light emitted from the plano-convex lens 49 is distributed without vignetting on the outer peripheral surface of the transparent member 47. Further, since the point P is located closer to the transparent member than the plane of the illumination optical system 44 that is closest to the transparent member, the above condition (1) can be more easily achieved than when the point P is located inside the illumination optical system 44. To be satisfied.
The transparent member 47 may be made of resin. [Second Embodiment] FIG. 5 is a sectional view of a distal end portion of a second embodiment of a protective cover endoscope according to the present invention. In the protective cover type endoscope device 51, an endoscope main body 52 is covered with a protective cover 53. An illumination optical system 54 and an observation optical system 55 are provided side by side with the endoscope main body 52, and the protective cover 53 has a tip. Surface 5
6 is provided with a transparent member 57 facing the illumination optical system 54 and the observation optical system 55. The illumination optical system 54 includes a light guide bundle 58, and a light source (not shown) is connected to the incident side of the light guide bundle 58. The observation optical system 55 includes an objective lens 5A and an image sensor 5B. A portion of the transparent member 57 facing the exit end surface of the light guide bundle 58 is formed as a plano-concave lens 5C having a flat surface facing the subject side, and the transparent member 57 is separated from the portion facing the objective lens 5A. A light shielding member 5E is provided integrally with the.
【００１５】図示しない光源からの光はライトガイドバ
ンドル５８を介し平凹レンズ５Ｃに入射し、図示しない
被写体を照明する。ライトガイドバンドル５８の最外周
部よりライトガイドバンドル５８の中心軸ｂに平行に射
出し平凹レンズ５Ｃを透過した光線ａを逆に延長した直
線と中心軸ｂとの交点をＰとすると、点Ｐはライトガイ
ドバンドル５８の射出端面と平凹レンズ５Ｃの凹面との
間に位置する。Light from a light source (not shown) enters the plano-concave lens 5C through the light guide bundle 58 and illuminates a subject (not shown). Let P be the intersection point of the central axis b and a straight line that extends in reverse from the outermost peripheral portion of the light guide bundle 58 and is transmitted parallel to the central axis b of the light guide bundle 58 and transmitted through the plano-concave lens 5C. Is located between the exit end surface of the light guide bundle 58 and the concave surface of the plano-concave lens 5C.
【００１６】ライトガイドバンドル５８の最外周部より
射出する平行光の、透明部材の最も被写体側の面での光
線高をｈ、透明部材５７の外周面とライトガイドバンド
ル５８の中心軸との最短距離をｒとしたとき ｈ＜ｒ ・・・（１） を満足するので、ライトガイドバンドル５８を射出した
光が透明部材５７の外周面でケラレずに配光がよい。ま
た透明部材の被写体側の面が平面に形成されているの
で、この面に水滴等が溜まって照明光や物体光に影響を
およぼすことがない。 〔実施の形態３〕 図６は本発明の保護カバー式内視鏡
の実施の形態３の先端部の断面図を示す。保護カバー式
内視鏡装置６１は内視鏡本体６２に保護カバー６３が被
覆されてなり、内視鏡本体６２には照明光学系６４と観
察光学系６５とが併設され、保護カバー６３は先端部６
６に照明光学系６４と観察光学系６５に対向するような
透明部材６７を備えている。照明光学系６４はライトガ
イドバンドル６８を備えており、ライトガイドバンドル
６８の入射側には図示しない光源が接続される。観察光
学系６５は対物レンズ６Ａと撮像素子６Ｂを備えてい
る。透明部材６７のうちライトガイドバンドル６８の射
出端面に対向する部分は被写体側に平面を向けた平凸レ
ンズ６Ｃに形成されており、これと対物レンズ６Ａに対
向する部分とを隔てるように透明部材６７と一体に遮光
部材６Ｅが設けられている。The ray height of the parallel light emitted from the outermost peripheral portion of the light guide bundle 58 on the surface of the transparent member closest to the subject is h, and the shortest distance between the outer peripheral surface of the transparent member 57 and the central axis of the light guide bundle 58. Since h <r (1) is satisfied when the distance is r, the light emitted from the light guide bundle 58 is well distributed without vignetting on the outer peripheral surface of the transparent member 57. Further, since the subject side surface of the transparent member is formed to be a flat surface, water droplets and the like will not be accumulated on this surface and will not affect the illumination light and the object light. [Third Embodiment] FIG. 6 is a sectional view of a distal end portion of a third embodiment of a protective cover endoscope according to the present invention. In the protective cover type endoscope device 61, an endoscope main body 62 is covered with a protective cover 63, an illumination optical system 64 and an observation optical system 65 are provided side by side with the endoscope main body 62, and the protective cover 63 has a tip. Part 6
6 is provided with a transparent member 67 facing the illumination optical system 64 and the observation optical system 65. The illumination optical system 64 includes a light guide bundle 68, and a light source (not shown) is connected to the incident side of the light guide bundle 68. The observation optical system 65 includes an objective lens 6A and an image sensor 6B. A portion of the transparent member 67 facing the exit end surface of the light guide bundle 68 is formed as a plano-convex lens 6C having a flat surface facing the subject side, and the transparent member 67 is separated from the portion facing the objective lens 6A. A light shielding member 6E is provided integrally with the.
【００１７】図示しない光源からの光はライトガイドバ
ンドル６８を介し、平凸レンズ６Ｃによって集束されレ
ンズ内部に位置する点Ｐで交わり、発散して透明部材６
７を透過し図示しない被写体を照明する。ライトガイド
バンドル６８の最外周部より射出する平行光の、透明部
材の最も被写体側の面での光線高をｈ、透明部材６７の
外周面とライトガイドバンドル６８の中心軸との最短距
離をｒとしたとき ｈ＜ｒ ・・・（１） を満足するので、ライトガイドバンドル６８を射出した
光が透明部材６７の外周面でケラレずに配光がよい。ま
た透明部材のうち照明光学系に対向する部分が光学的パ
ワーをもつので、前記実施の形態２やこの実施の形態の
ようにこの光学的パワーが異なる保護カバー５３，６３
を用いることによって、種々の照明範囲を選択し得る。 〔実施の形態４〕 図７は本発明の保護カバー式内視鏡
装置の実施の形態４の先端部の断面図を示す。保護カバ
ー式内視鏡装置７１は内視鏡本体７２に保護カバー７３
が被覆されてなり、内視鏡本体７２には照明光学系７４
と観察光学系７５とが併設され、保護カバー７３は先端
面７６に照明光学系７４と観察光学系７５に対向するよ
うな透明部材７７を備えている。照明光学系７４はライ
トガイドバンドル７８とレンズ系７９を備え、レンズ系
７９はライトガイドバンドル７８の射出端面に近接して
配置される。ライトガイドバンドル７８の入射側には図
示しない光源が接続される。観察光学系７５は対物レン
ズ７Ａと撮像素子７Ｂを備えている。さらに、レンズ系
７９と対物レンズ７Ａとを隔てるように内視鏡本体の先
端面７Ｃに遮光壁７Ｄが設けられている。透明部材７７
のうちレンズ系７９に対向する部分と対物レンズ７Ａに
対向する部分とを隔てるように透明部材７７と一体に遮
光部材７Ｅが設けられている。Light from a light source (not shown) passes through the light guide bundle 68, is converged by the plano-convex lens 6C, intersects at a point P located inside the lens, diverges, and diverges.
7 is transmitted to illuminate a subject (not shown). The ray height of the parallel light emitted from the outermost peripheral portion of the light guide bundle 68 on the surface of the transparent member closest to the subject is h, and the shortest distance between the outer peripheral surface of the transparent member 67 and the central axis of the light guide bundle 68 is r. Since h <r (1) is satisfied, the light emitted from the light guide bundle 68 is well distributed without vignetting on the outer peripheral surface of the transparent member 67. Further, since the portion of the transparent member facing the illumination optical system has optical power, the protective covers 53, 63 having different optical powers as in the second embodiment and this embodiment.
Various illumination ranges can be selected by using. [Fourth Embodiment] FIG. 7 is a sectional view of a distal end portion of a fourth embodiment of a protective cover type endoscope apparatus according to the present invention. The protective cover type endoscope device 71 includes a main body 72 and a protective cover 73.
The endoscope main body 72 is provided with an illumination optical system 74
And the observation optical system 75 are provided side by side, and the protective cover 73 is provided with a transparent member 77 on the front end surface 76 so as to face the illumination optical system 74 and the observation optical system 75. The illumination optical system 74 includes a light guide bundle 78 and a lens system 79, and the lens system 79 is arranged close to the exit end surface of the light guide bundle 78. A light source (not shown) is connected to the incident side of the light guide bundle 78. The observation optical system 75 includes an objective lens 7A and an image pickup element 7B. Further, a light shielding wall 7D is provided on the front end surface 7C of the endoscope main body so as to separate the lens system 79 and the objective lens 7A. Transparent member 77
A light shielding member 7E is provided integrally with the transparent member 77 so as to separate a portion facing the lens system 79 and a portion facing the objective lens 7A.
【００１８】図示しない光源からの光はライトガイドバ
ンドル７８を介し、レンズ系７９によって集束されレン
ズ系７９の透明部材側の面と透明部材７７のレンズ系側
の面との間に位置する点Ｐで交わり、発散して透明部材
７７を透過し図示しない被写体を照明する。このとき光
の一部は透明部材７７の外周面７Ｆに入射するが、外周
面７Ｆは光学面に形成されているので、外周面７Ｆで散
乱されずに透明部材７７の被写体側に射出し被写体を照
明する。よって照明光量の損失が少ない。なお、透明部
材７７の外周面７Ｆと接合する面が光学面に形成されて
いてもよく、透明部材の外周面７Ｆとその外周面７Ｆと
接合する面の両方が光学面に形成されていてもよい。 〔実施の形態５〕 図８は本発明の保護カバー式内視鏡
装置の実施の形態５の透明部材のうち照明光学系に対向
する部分の断面図を示す。透明部材以外は前記実施の形
態４と同じであり説明を省く。照明光学系に対向する透
明部材８１は屈折率の異なる２種類の材質で形成され、
周縁部分８２の材質の屈折率をｎ１、前記周縁部分８２
に囲まれる中心部分８３の材質の屈折率をｎ２としたと
き ｎ１＜ｎ２ ・・・（２） を満足するので、透明部材８１の外周面８４に入射しよ
うとする光は２種類の材質の境界面８５で全反射され、
透明部材８１の被写体側に射出し被写体を照明する。よ
って照明光量の損失が少ない。前記実施の形態２および
３における透明部材は屈折率分布材質で形成されてもよ
い。その場合は透明部材は両平面に形成すればよいの
で、透明部材の製作が簡単である。また、透明部材は回
折素子であってもよい。さらに、以上には本願発明に係
る保護カバーを直視用内視鏡本体と組み合わせる場合だ
けを示したが、側視用内視鏡本体や斜視用内視鏡本体と
組み合わせてもよい。Light from a light source (not shown) is focused by the lens system 79 via the light guide bundle 78 and is located between the transparent member side surface of the lens system 79 and the lens system side surface of the transparent member 77. Intersect with each other, diverge and transmit through the transparent member 77 to illuminate a subject (not shown). At this time, a part of the light is incident on the outer peripheral surface 7F of the transparent member 77, but since the outer peripheral surface 7F is formed as an optical surface, it is emitted to the subject side of the transparent member 77 without being scattered by the outer peripheral surface 7F. Illuminate. Therefore, the loss of the illumination light amount is small. The surface of the transparent member 77 that is joined to the outer peripheral surface 7F may be formed as an optical surface, or both the outer peripheral surface 7F of the transparent member and the surface that is joined to the outer peripheral surface 7F may be formed as an optical surface. Good. [Fifth Embodiment] FIG. 8 is a cross-sectional view of a portion of a transparent member of a fifth embodiment of a protective cover type endoscope apparatus of the present invention which faces an illumination optical system. Except for the transparent member, it is the same as that of the fourth embodiment and will not be described. The transparent member 81 facing the illumination optical system is made of two kinds of materials having different refractive indexes,
The refractive index of the material of the peripheral portion 82 is n 1 , and the peripheral portion 82 is
Since n 1 <n 2 (2) is satisfied when the refractive index of the material of the central portion 83 surrounded by is n 2 , the light that is about to enter the outer peripheral surface 84 of the transparent member 81 is of two types. It is totally reflected by the boundary surface 85 of the material,
The transparent member 81 is emitted to the subject side to illuminate the subject. Therefore, the loss of the amount of illumination light is small. The transparent member in Embodiments 2 and 3 may be made of a material having a refractive index distribution. In that case, since the transparent member may be formed on both planes, the transparent member can be easily manufactured. Further, the transparent member may be a diffractive element. Furthermore, although the case where the protective cover according to the present invention is combined with the direct-viewing endoscope main body has been described above, it may be combined with the side-viewing endoscope main body or the oblique-viewing endoscope main body.
【００１９】[0019]
【発明の効果】 本願発明の保護カバー式内視鏡によれ
ば、内視鏡の外径を太径化することなく、配光をよくす
ることができる。According to the protective cover type endoscope of the present invention, the light distribution can be improved without increasing the outer diameter of the endoscope.
【図１】本願発明の一例の先端部の断面図である。FIG. 1 is a cross-sectional view of a tip portion of an example of the present invention.
【図２】本願発明の別の例の先端部の断面図である。FIG. 2 is a cross-sectional view of the tip of another example of the present invention.
【図３】本願発明の実施の形態１の先端部を被写体の方
向から見た図である。FIG. 3 is a diagram of the tip end portion according to the first embodiment of the present invention as viewed from the direction of the subject.
【図４】本願発明の実施の形態１の先端部の断面図であ
る。FIG. 4 is a cross-sectional view of the tip end portion according to the first embodiment of the present invention.
【図５】本願発明の実施の形態２の先端部の断面図であ
る。FIG. 5 is a sectional view of a tip end portion according to a second embodiment of the present invention.
【図６】本願発明の実施の形態３の先端部の断面図であ
る。FIG. 6 is a sectional view of a tip end portion according to a third embodiment of the present invention.
【図７】本願発明の実施の形態４の先端部の断面図であ
る。FIG. 7 is a sectional view of a tip end portion according to a fourth embodiment of the present invention.
【図８】本願発明の実施の形態５の透明部材の断面図で
ある。FIG. 8 is a sectional view of a transparent member according to a fifth embodiment of the present invention.
１１，４２，５２，６２，７２ 内視鏡本体 １２，４４，５４，６４，７４ 照明光学系 １３，４８，５８，６８，７８ ライトガイドバンドル １４ レンズ １５，４３，５３，６３，７３ 保護カバー １６，４６，５６，６６，７６ 先端部 １７，２２，４７，５７，６７，７７，８１ 透明部材 １８，２３，７Ｆ，８４ 外周面 ２１ レンズ系 ３１ チャネル ３２ 送水ノズル ４１，５１，６１，７１ 保護カバー式内視鏡 ４５，５５，６５，７５ 観察光学系 ４９ 平凸レンズ ４Ａ，５Ａ，６Ａ，７Ａ 対物レンズ ４Ｂ，５Ｂ，６Ｂ，７Ｂ 撮像素子 ４Ｃ，７Ｃ 先端面 ４Ｄ，７Ｄ 遮光壁 ４Ｅ，５Ｅ，６Ｅ，７Ｅ 遮光部材 ５Ｃ 平凹レンズ ６Ｃ 平凸レンズ ７９ レンズ系 ８２ 周縁部分 ８３ 中心部分 ８５ 境界面 ａ 光線 ｂ 中心軸 Ｓ１，Ｓ２，Ｓ３ 面11, 42, 52, 62, 72 Endoscope body 12, 44, 54, 64, 74 Illumination optical system 13, 48, 58, 68, 78 Light guide bundle 14 Lens 15, 43, 53, 63, 73 Protective cover 16, 46, 56, 66, 76 Tip part 17, 22, 47, 57, 67, 77, 81 Transparent member 18, 23, 7F, 84 Outer peripheral surface 21 Lens system 31 Channel 32 Water supply nozzle 41, 51, 61, 71 Protective cover type endoscope 45, 55, 65, 75 Observation optical system 49 Plano-convex lens 4A, 5A, 6A, 7A Objective lens 4B, 5B, 6B, 7B Imaging device 4C, 7C Tip surface 4D, 7D Light-shielding wall 4E, 5E , 6E, 7E Light-shielding member 5C Plano-concave lens 6C Plano-convex lens 79 Lens system 82 Peripheral part 83 Central part 85 Boundary surface a Ray b Central axis S 1 , S 2 , S 3 side
Claims (9)
部材を備え前記内視鏡本体の少なくとも一部を被覆する
保護カバーとを組み合わせる保護カバー式内視鏡装置に
おいて、前記照明光学系のライトガイドバンドルの最外
周部より射出する平行光の、前記透明部材の最も被写体
側の面での光線高をｈ、前記透明部材の外周面と前記ラ
イトガイドバンドルの中心軸との最短距離をｒとしたと
き ｈ＜ｒ ・・・（１） を満足することを特徴とする保護カバー式内視鏡装置。1. A protective cover type endoscope apparatus in which an endoscope main body having an illumination optical system and a protective cover having a transparent member and covering at least a part of the endoscope main body are combined, wherein the illumination optical system is provided. Of the parallel light emitted from the outermost peripheral part of the light guide bundle at the most object side surface of the transparent member, h, and the shortest distance between the outer peripheral surface of the transparent member and the central axis of the light guide bundle. When r is set, h <r (1) is satisfied, which is a protective cover type endoscope apparatus.
を特徴とする、請求項１記載の保護カバー式内視鏡装
置。2. The protective cover type endoscope apparatus according to claim 1, wherein the transparent member has optical power.
成されることを特徴とする、請求項２記載の保護カバー
式内視鏡装置。3. The protective cover type endoscope apparatus according to claim 2, wherein a surface of the transparent member on the object side is formed as a flat surface.
れることを特徴とする、請求項２または３記載の保護カ
バー式内視鏡装置。4. The protective cover type endoscope apparatus according to claim 2, wherein the transparent member is formed of a material having a refractive index distribution.
徴とする、請求項２または３記載の保護カバー式内視鏡
装置。5. The protective cover type endoscope apparatus according to claim 2, wherein the transparent member is a diffractive element.
部材を備え前記内視鏡本体の少なくとも一部を被覆する
保護カバーとを組み合わせる保護カバー式内視鏡装置に
おいて、前記透明部材の外周面が照明光に対して反射率
が高い面で形成されることを特徴とする保護カバー式内
視鏡装置。6. A protective cover type endoscope apparatus in which an endoscope main body having an illumination optical system and a protective cover having a transparent member and covering at least a part of the endoscope main body are combined, wherein A protective cover type endoscope device, wherein an outer peripheral surface is formed of a surface having high reflectance with respect to illumination light.
接合する面のうち少なくとも一方が光学面で形成される
ことを特徴とする、請求項６記載の保護カバー式内視鏡
装置。7. The protective cover type endoscope apparatus according to claim 6, wherein at least one of an outer peripheral surface of the transparent member and a surface joined to the outer peripheral surface is an optical surface.
材質で形成され、前記照明光学系側透明部材の周縁部分
の材質の屈折率をｎ１、前記周縁部分に囲まれる部分の
材質の屈折率をｎ２としたとき ｎ１＜ｎ２ ・・・（２） を満足することを特徴とする、請求項６または７記載の
保護カバー式内視鏡装置。8. The transparent member is formed of two kinds of materials having different refractive indexes, the peripheral edge of the illumination optical system side transparent member has a refractive index of n 1 , and the peripheral portion of the transparent member has a refractive index of n 1 . The protective cover-type endoscope apparatus according to claim 6 or 7, wherein n 1 <n 2 (2) when the refractive index is n 2 .
特徴とする、請求項１乃至８記載の保護カバー式内視鏡
装置。9. The protective cover type endoscope apparatus according to claim 1, wherein the transparent member is made of resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8102197A JPH09285440A (en) | 1996-04-24 | 1996-04-24 | Protection cover type endoscope apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8102197A JPH09285440A (en) | 1996-04-24 | 1996-04-24 | Protection cover type endoscope apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09285440A true JPH09285440A (en) | 1997-11-04 |
Family
ID=14320942
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8102197A Ceased JPH09285440A (en) | 1996-04-24 | 1996-04-24 | Protection cover type endoscope apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09285440A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017179161A1 (en) * | 2016-04-14 | 2017-10-19 | オリンパス株式会社 | Illumination optical system and imaging device |
| WO2019003508A1 (en) * | 2017-06-29 | 2019-01-03 | オリンパス株式会社 | Endoscope |
| CN110151099A (en) * | 2019-06-03 | 2019-08-23 | 厦门广盛弘科技有限公司 | A kind of medical endoscope |
-
1996
- 1996-04-24 JP JP8102197A patent/JPH09285440A/en not_active Ceased
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017179161A1 (en) * | 2016-04-14 | 2017-10-19 | オリンパス株式会社 | Illumination optical system and imaging device |
| JPWO2017179161A1 (en) * | 2016-04-14 | 2019-02-14 | オリンパス株式会社 | Illumination optical system and imaging apparatus |
| US10709320B2 (en) | 2016-04-14 | 2020-07-14 | Olympus Corporation | Illumination optical system and image-acquisition apparatus |
| WO2019003508A1 (en) * | 2017-06-29 | 2019-01-03 | オリンパス株式会社 | Endoscope |
| JP6523587B1 (en) * | 2017-06-29 | 2019-06-05 | オリンパス株式会社 | Endoscope |
| US11099374B2 (en) | 2017-06-29 | 2021-08-24 | Olympus Corporation | Endoscope |
| CN110151099A (en) * | 2019-06-03 | 2019-08-23 | 厦门广盛弘科技有限公司 | A kind of medical endoscope |
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