JPH0248808Y2 - - Google Patents
Info
- Publication number
- JPH0248808Y2 JPH0248808Y2 JP1984060567U JP6056784U JPH0248808Y2 JP H0248808 Y2 JPH0248808 Y2 JP H0248808Y2 JP 1984060567 U JP1984060567 U JP 1984060567U JP 6056784 U JP6056784 U JP 6056784U JP H0248808 Y2 JPH0248808 Y2 JP H0248808Y2
- Authority
- JP
- Japan
- Prior art keywords
- optical system
- illumination
- refractive index
- endoscope
- observation
- 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.)
- Expired
Links
- 230000003287 optical effect Effects 0.000 claims description 35
- 238000005286 illumination Methods 0.000 claims description 21
- 238000009792 diffusion process Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
Description
【考案の詳細な説明】
技術分野
本考案は、簡単な構成により観察部位を有効に
照明し得るようにした内視鏡用照明光学系に関す
るものである。[Detailed Description of the Invention] Technical Field The present invention relates to an illumination optical system for an endoscope that can effectively illuminate an observation region with a simple configuration.
従来技術
一般に内視鏡による観察において、特に近点被
写体を観察する場合、観察光学系と照明光学系と
が平行に配設されているため観察範囲と照明範囲
との間にずれが生じてしまう。このため例えば実
開昭52−52386号、特開昭55−60432号等により、
照明光学系からの光が観察光学系の観察範囲をカ
バーするようにしたものが知られている。しかし
ながら、これらは何れも特別の形状の拡散レンズ
を使用したり、内部に反射面を有するガラス板に
さらに軸方向に屈折率の異なるガラス板を重ねた
ものを使用しているため、構造が複雑で従つて製
造コストが高くなつてしまうという欠点があつ
た。Prior Art In general, when observing with an endoscope, especially near-point objects, the observation optical system and the illumination optical system are arranged in parallel, resulting in a misalignment between the observation range and the illumination range. . For this reason, for example, according to Utility Model Application Publication No. 52-52386, Japanese Patent Application Publication No. 55-60432, etc.
A device in which light from an illumination optical system covers the observation range of an observation optical system is known. However, all of these systems use a specially shaped diffuser lens or a glass plate with an internal reflective surface and a glass plate with a different refractive index stacked in the axial direction, resulting in a complex structure. Therefore, there was a drawback that the manufacturing cost was high.
目 的
本考案は、以上の点に鑑み、簡単な構成により
近点被写体の観察時にも観察範囲を有効に照明し
得るようにした内視鏡用照明光学系を提供するこ
とを目的としている。Purpose In view of the above points, it is an object of the present invention to provide an illumination optical system for an endoscope that has a simple configuration and can effectively illuminate the observation range even when observing a near-point object.
概 要
この目的は、ライトガイドと、該ライトガイド
の射出側に配置された照明用レンズとを備えた内
視鏡用照明光学系において、前記照明レンズが、
観察光学系側で屈折率が高く且つ反対側で屈折率
が低くなるように互いに屈折率の異なる複数の透
明部材を、前記照明レンズの光軸に対して平行又
は傾斜させた平面を互いの境界面として、前記照
明レンズがほぼ光軸に関して対称な形状となるよ
うに接合することにより構成されていることを特
徴とする内視鏡用照明光学系により解決される。Summary This object provides an illumination optical system for an endoscope that includes a light guide and an illumination lens disposed on the exit side of the light guide, in which the illumination lens
A plurality of transparent members having different refractive indexes are arranged so that the refractive index is high on the observation optical system side and low on the opposite side, and a plane parallel to or inclined to the optical axis of the illumination lens is used as a boundary between them. The present invention is solved by an illumination optical system for an endoscope, characterized in that the illumination lenses are joined together so as to have a substantially symmetrical shape with respect to the optical axis.
実施例
以下図面に示した実施例に基づき本考案を説明
すれば、先づ第１図において、１は内視鏡のライ
トガイドで、その射出端が符号１ａにより示され
ている。２はライトガイド１の射出端１ａに対向
して配設された本考案による照明光学系を構成す
る拡散レンズで、その右側には図示しない観察光
学系が配設されており、該拡散レンズ２はこの観
察光学系側の屈折率n1の部分２ａと反対側の屈折
率n2（n2＜n1）の部分２ｂとを光軸方向に延びて
いる接合面２ｃで接合することにより形成されて
いる。Embodiment The present invention will be described below based on an embodiment shown in the drawings. First, in FIG. 1, reference numeral 1 denotes a light guide of an endoscope, the exit end of which is indicated by the reference numeral 1a. Reference numeral 2 denotes a diffusion lens configuring the illumination optical system according to the present invention, which is disposed opposite to the exit end 1a of the light guide 1. An observation optical system (not shown) is disposed on the right side of the diffusion lens 2. is formed by joining a portion 2a with a refractive index n 1 on the observation optical system side and a portion 2b with a refractive index n 2 (n 2 < n 1 ) on the opposite side with a bonding surface 2c extending in the optical axis direction. has been done.
本案実施例は以上のように構成されているか
ら、ライトガイド１の射出端１ａから出た光のう
ち拡散レンズ２の接合面２ｃに入射する光Ａ，Ｂ
は該接合面２ｃを通過する際に部分２ａの屈折率
n1が部分２ｂの屈折率n2より高いために図示しな
い観察光学系側に屈折せしめられ、かくして観察
光学系による観察範囲が有効に照明される。 Since the present embodiment is configured as described above, out of the light emitted from the exit end 1a of the light guide 1, the light A and B incident on the cemented surface 2c of the diffuser lens 2 are
is the refractive index of the portion 2a when passing through the bonding surface 2c.
Since the refractive index n 1 is higher than the refractive index n 2 of the portion 2b, it is refracted toward the observation optical system (not shown), and thus the observation range by the observation optical system is effectively illuminated.
第２図において、２′はライトガイド１の射出
端面に対して傾斜した接合面２′ｃで接合された
屈折率n1の部分２′ａと屈折率n2（n2＜n1）の部分
２′ｂとから成る拡散レンズであり、第１図の場
合と同様にその右側に図示しない観察光学系が配
設されている。この構成によれば、ライトガイド
１の射出端１ａから出て拡散レンズ２′に入射す
る光はすべて接合面２′ｃを通過しこのとき図示
しない観察光学系側に屈折せしめられ、観察光学
系による観察範囲がさらに有効に照明される。 In FIG. 2, 2' is a part 2'a with a refractive index n 1 and a part 2'a with a refractive index n 2 (n 2 < n 1 ) which are joined by a joining surface 2'c inclined with respect to the exit end surface of the light guide 1. It is a diffusing lens consisting of a portion 2'b, and an observation optical system (not shown) is disposed on the right side thereof, as in the case of FIG. 1. According to this configuration, all the light that comes out from the exit end 1a of the light guide 1 and enters the diffusing lens 2' passes through the cemented surface 2'c, is refracted toward the observation optical system (not shown), and is refracted toward the observation optical system (not shown). The observation range is illuminated more effectively.
考案の効果
以上述べたように本考案によれば、照明光学系
を構成する光学要素を、屈折率の異なる光学材料
の接合により、観察光学系側の屈折率が高く反対
側で屈折率が低くなるようにしたから、構成が簡
単で且つ製造コストが低く、而も近点被写体を観
察する場合にも観察光学系による観察範囲を有効
に照明することができる、という効果がある。Effects of the invention As described above, according to the invention, the optical elements constituting the illumination optical system are bonded with optical materials having different refractive indexes, so that the refractive index on the observation optical system side is high and the refractive index on the opposite side is low. As a result, the structure is simple and the manufacturing cost is low, and even when observing a near-point object, the observation range by the observation optical system can be effectively illuminated.
又、光学要素がその光軸に関して対称なので、
実装上も便利である。 Also, since the optical element is symmetrical about its optical axis,
It is also convenient for implementation.
第１図及び第２図は屈折率の異なる光学材料を
接合した本考案による内視鏡用照明光学系の実施
例を示す概略側面図である。
１……ライトガイド、１ａ……射出端、２，
２′……拡散レンズ。
FIGS. 1 and 2 are schematic side views showing an embodiment of an endoscope illumination optical system according to the present invention in which optical materials having different refractive indexes are bonded together. 1... Light guide, 1a... Injection end, 2,
2'... Diffusion lens.
Claims (1)
置された照明用レンズとを備えた内視鏡用照明光
学系において、 前記照明レンズが、観察光学系側で屈折率が高
く且つ反対側で屈折率が低くなるように互いに屈
折率の異なる複数の透明部材を、前記照明レンズ
の光軸に対して平行または傾斜させた平面を互い
の境界面として、前記照明レンズがほぼ光軸に関
して対称な形状となるように接合することにより
構成されていることを特徴とする内視鏡用照明光
学系。[Claims for Utility Model Registration] An illumination optical system for an endoscope that includes a light guide and an illumination lens disposed on the exit side of the light guide, wherein the illumination lens has a refractive index on the observation optical system side. The illumination lens is made of a plurality of transparent members having different refractive indexes such that the refractive index is high and the refractive index is low on the opposite side, with a plane that is parallel or inclined to the optical axis of the illumination lens as their boundary surface. An illumination optical system for an endoscope, characterized in that the illumination optical system for an endoscope is constructed by joining so as to have a substantially symmetrical shape with respect to an optical axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6056784U JPS60172119U (en) | 1984-04-24 | 1984-04-24 | Illumination optical system for endoscopes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6056784U JPS60172119U (en) | 1984-04-24 | 1984-04-24 | Illumination optical system for endoscopes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60172119U JPS60172119U (en) | 1985-11-14 |
| JPH0248808Y2 true JPH0248808Y2 (en) | 1990-12-21 |
Family
ID=30588034
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6056784U Granted JPS60172119U (en) | 1984-04-24 | 1984-04-24 | Illumination optical system for endoscopes |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60172119U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0814661B2 (en) * | 1986-02-17 | 1996-02-14 | オリンパス光学工業株式会社 | View conversion optical system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56132931A (en) * | 1980-03-24 | 1981-10-17 | Olympus Optical Co | Endoscope |
| JPS589207U (en) * | 1981-07-06 | 1983-01-21 | 株式会社日立製作所 | Pressure screw air seal for vertical rolling mill |
| JPS589208U (en) * | 1981-07-09 | 1983-01-21 | 石川島播磨重工業株式会社 | steel plate cooling system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5429182Y2 (en) * | 1975-10-11 | 1979-09-18 |
-
1984
- 1984-04-24 JP JP6056784U patent/JPS60172119U/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56132931A (en) * | 1980-03-24 | 1981-10-17 | Olympus Optical Co | Endoscope |
| JPS589207U (en) * | 1981-07-06 | 1983-01-21 | 株式会社日立製作所 | Pressure screw air seal for vertical rolling mill |
| JPS589208U (en) * | 1981-07-09 | 1983-01-21 | 石川島播磨重工業株式会社 | steel plate cooling system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60172119U (en) | 1985-11-14 |
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