JP2022182872A5 - - Google Patents
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- JP2022182872A5 JP2022182872A5 JP2021090645A JP2021090645A JP2022182872A5 JP 2022182872 A5 JP2022182872 A5 JP 2022182872A5 JP 2021090645 A JP2021090645 A JP 2021090645A JP 2021090645 A JP2021090645 A JP 2021090645A JP 2022182872 A5 JP2022182872 A5 JP 2022182872A5
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Claims (15)
前記挿入部の先端部の先端面に設けられた観察窓と、
前記先端部の前記先端面に設けられ、前記先端面を先端側から見たときにリング状又は部分円形を有する照明窓と、
前記照明窓の後ろ側に設けられ、光が入射する入射部と、照明光として前記光を出射する出射部とを有する光学素子と、
を有し、
前記入射部又は前記出射部は、前記光を拡散させる少なくとも１つ以上の凸部を有する拡散部を有し、
前記少なくとも１つ以上の凸部は、前記先端部の前記先端面を先端側から見たときに、前記挿入部の中心から外径方向に出射される第１の光よりも、前記挿入部の前記中心に向かう内径方向に出射される第２の光又は前記挿入部の外周部の接線方向に出射される第３の光の方が多くなるように、前記出射部から出射される光を拡散させるよう構成される、
照明光学系。 An illumination optical system for an endoscope having an insertion section inserted into a subject,
an observation window provided on the distal end surface of the distal end of the insertion section;
an illumination window provided on the distal end surface of the distal end portion and having a ring shape or a partially circular shape when the distal end surface is viewed from the distal end side;
an optical element that is provided on the back side of the illumination window and has an entrance part into which light enters, and an output part which emits the light as illumination light;
has
The entrance part or the exit part has a diffusion part having at least one convex part that diffuses the light,
When the distal end face of the distal end section is viewed from the distal end side, the at least one or more convex portions may cause the insertion section to emit more light than the first light emitted from the center of the insertion section in the outer radial direction. Diffusing the light emitted from the emitting part so that the second light emitted in the inner radial direction toward the center or the third light emitted in the tangential direction of the outer peripheral part of the insertion part becomes larger. configured to cause
Illumination optical system.
前記照明窓は、前記リング状であり、
前記少なくとも１つ以上の凸部は、複数あり、
各凸部は、２つの斜面部を有し、各凸部の先端側部分が前記円筒形状の中心軸に近づくように、前記円筒形状の中心軸に対して所定の角度だけ傾いて、前記光学素子の外周部に形成されている、
請求項１に記載の照明光学系。 The optical element has a cylindrical shape,
The illumination window is ring-shaped,
There is a plurality of at least one convex portion,
Each convex portion has two sloped portions, and is inclined at a predetermined angle with respect to the central axis of the cylindrical shape so that the tip side portion of each convex portion approaches the central axis of the cylindrical shape. formed on the outer periphery of the element,
The illumination optical system according to claim 1.
前記入射部に入射した光は、前記２つの斜面部で全反射した後に前記平面を透過する成分と、前記２つの斜面部で全反射しないでそのまま前記平面を透過する成分の少なくとも２つの成分を含んで前記出射部から出射される、
請求項２に記載の照明光学系。 The emission section has a flat surface,
The light incident on the incident part has at least two components: a component that is totally reflected by the two slope parts and then transmitted through the plane, and a component that is not totally reflected by the two slope parts and passes through the plane as it is. and is emitted from the emitting section,
The illumination optical system according to claim 2.
請求項３に記載の照明光学系。 The plane has a shape in which a plurality of triangles formed by the two slope parts are arranged in the ring shape when the distal end surface of the distal end part is viewed from the distal end side.
The illumination optical system according to claim 3.
前記照明窓は、前記リング状であり、
前記少なくとも１つ以上の凸部は、前記先端部を先端側から見たときに１つのリング状であり、
前記１つのリング状の凸部は、第１の斜面部と、前記第１の斜面部の内側に設けられた第２の斜面部とを有し、
前記第１の斜面部は、前記円筒形状の中心軸を通りかつ前記中心軸に平行な断面において、前記基端部からの前記光を全反射するように前記中心軸に直交する平面に対して第１の角度を有し、
前記第２の斜面部は、前記円筒形状の中心軸を通りかつ前記中心軸に平行な断面において、前記基端部からの前記光を透過するように前記中心軸に直交する平面に対して第２の角度を有する、
請求項１に記載の照明光学系。 The optical element has a cylindrical shape,
The illumination window is ring-shaped,
The at least one convex portion has a ring shape when the distal end portion is viewed from the distal end side,
The one ring-shaped convex portion has a first slope portion and a second slope portion provided inside the first slope portion,
The first slope portion is configured to face a plane perpendicular to the central axis so as to totally reflect the light from the base end in a cross section passing through the central axis of the cylindrical shape and parallel to the central axis. has a first angle;
In a cross section that passes through the central axis of the cylindrical shape and is parallel to the central axis, the second sloped portion is arranged at an angle with respect to a plane perpendicular to the central axis so as to transmit the light from the base end. has an angle of 2,
The illumination optical system according to claim 1.
前記照明窓は、前記リング状であり、
前記少なくとも１つ以上の凸部は、複数あり、
前記各凸部は、第１の斜面部と第２の斜面部とを有し、前記円筒形状の中心軸から外径方向に沿って伸びた細長形状を有し、
前記第１の斜面部は、前記円筒形状の中心軸回りの接線方向に沿った断面において、前記基端部からの前記光を全反射するように前記中心軸に直交する平面に対して第１の角度を有し、
前記第２の斜面部は、前記円筒形状の中心軸回りの接線方向に沿った断面において、前記平面に対して第２の角度を有する、
請求項１に記載の照明光学系。 The optical element has a cylindrical shape,
The illumination window is ring-shaped,
There is a plurality of at least one convex portion,
Each of the convex portions has a first slope portion and a second slope portion, and has an elongated shape extending along the outer diameter direction from the central axis of the cylindrical shape,
The first slope portion is configured to have a first slope with respect to a plane orthogonal to the central axis so as to totally reflect the light from the base end in a cross section along a tangential direction around the central axis of the cylindrical shape. has an angle of
The second slope portion has a second angle with respect to the plane in a cross section along a tangential direction around the central axis of the cylindrical shape.
The illumination optical system according to claim 1.
前記第３の斜面部と前記第４の斜面部は、前記平面に対して、それぞれ前記第１の斜面部と前記第２の斜面部とは面対称に形成されている、請求項６に記載の照明光学系。 Each of the convex portions further includes a third slope portion and a fourth slope portion,
7 . The third slope portion and the fourth slope portion are formed to be plane symmetrical with respect to the plane, respectively, with respect to the plane of the first slope portion and the second slope portion. illumination optical system.
前記照明窓は、前記部分円形を有し、
前記少なくとも１つ以上の凸部は、前記部分円形の半径が互いに異なる複数の円弧に沿って、前記光学素子の前記出射部に複数設けられ、
各凸部は、第１の斜面部と第２の斜面部とを有し、
前記部分円形の中心側の第１の領域では、前記先端部の前記先端面を先端側から見たときに、前記挿入部の中心軸から外径方向に第１の光を出射し、前記部分円形の前記第１の領域の外側の第２の領域では、前記先端部の前記先端面を先端側から見たときに、前記挿入部の前記中心に向かう内径方向に第２の光を出射する、
請求項１に記載の照明光学系。 The optical element has a partially cylindrical shape,
The illumination window has the partially circular shape,
A plurality of the at least one convex portions are provided in the output portion of the optical element along a plurality of circular arcs in which the radius of the partial circle is different from each other,
Each convex portion has a first slope portion and a second slope portion,
In the first region on the center side of the partial circle, when the distal end surface of the distal end section is viewed from the distal end side, the first light is emitted in the outer radial direction from the central axis of the insertion section, and In a second region outside the circular first region, a second light is emitted in an inner radial direction toward the center of the insertion portion when the distal end surface of the distal end portion is viewed from the distal end side. ,
The illumination optical system according to claim 1.
前記第１の領域では、前記第１の斜面部は、前記第２の斜面部よりも、前記部分円形の内径側に設けられ、
前記第２の領域では、前記第１の斜面部は、前記第２の斜面部よりも、前記部分円形の外径側に設けられている、
請求項６に記載の照明光学系。 The first sloped portion is arranged in a plane perpendicular to the central axis so as to totally reflect the light from the proximal end in a cross section passing through the center of the partial circle and parallel to the central axis of the insertion portion. has a first angle with respect to the insertion portion, and the second slope portion transmits the light from the proximal end portion in a cross section passing through the center of the partial circle and parallel to the central axis of the insertion portion. having a second angle with respect to a plane perpendicular to the central axis, such that
In the first region, the first slope portion is provided closer to the inner diameter side of the partial circle than the second slope portion,
In the second region, the first slope portion is provided closer to the outer diameter side of the partial circle than the second slope portion.
The illumination optical system according to claim 6.
前記照明窓は、前記部分円形を有し、
前記先端部の前記先端面を先端側から見たときに、前記部分円形の中心側の第１の領域では、前記少なくとも１つ以上の凸部は、前記部分円形の半径が互いに異なる複数の円弧に沿って、前記光学素子の前記出射部に複数設けられ、前記挿入部の中心軸から内径又は外径方向に第１の光を出射し、
前記先端部の前記先端面を先端側から見たときに、前記部分円形の前記第１の領域の外側の第２の領域では、前記少なくとも１つ以上の凸部は、前記部分円形の中心から外径方向に沿って伸びた細長形状を有し、前記部分円形の接線方向に第３の光を出射する、
請求項１に記載の照明光学系。 The optical element has a partially cylindrical shape,
The illumination window has the partially circular shape,
When the distal end surface of the distal end portion is viewed from the distal end side, in the first region on the center side of the partial circle, the at least one convex portion is formed of a plurality of circular arcs in which the radius of the partial circle is different from each other. A plurality of first lights are provided in the output section of the optical element along the line, and emit first light in the inner diameter or outer diameter direction from the central axis of the insertion section,
When the distal end face of the distal end portion is viewed from the distal end side, in a second region outside the first region of the partially circular shape, the at least one convex portion is located at a distance from the center of the partially circular region. It has an elongated shape extending along the outer diameter direction, and emits the third light in the tangential direction of the partial circle.
The illumination optical system according to claim 1.
前記第１の斜面部は、前記部分円形の中心を通りかつ前記挿入部の中心軸に平行な断面において、前記基端部からの前記光を全反射するように前記中心軸に直交する平面に対して第１の角度を有し、前記第２の斜面部は、前記部分円形の中心軸を通りかつ前記挿入部の中心軸に平行な断面において、前記基端部からの前記光を透過するように前記中心軸に直交する平面に対して第２の角度を有し、
前記第２の領域の各凸部は、第３の斜面部と第４の斜面部とを有し、
前記第３の斜面部は、前記部分円形の中心回りの接線方向に沿った断面において、前記基端部からの前記光を全反射するように前記挿入部の中心軸に直交する平面に対して第３の角度を有し、前記第４の斜面部は、前記部分円形の中心回りの接線方向に沿った断面において、前記基端部からの前記光を透過するように前記挿入部の中心軸に直交する平面に対して第４の角度を有する、
請求項１０に記載の照明光学系。 Each convex portion in the first region has a first slope portion and a second slope portion,
The first slope section is arranged on a plane perpendicular to the central axis so as to totally reflect the light from the proximal end in a cross section passing through the center of the partial circle and parallel to the central axis of the insertion section. has a first angle with respect to the insertion portion, and the second slope portion transmits the light from the proximal end portion in a cross section passing through the central axis of the partially circular shape and parallel to the central axis of the insertion portion. having a second angle with respect to a plane perpendicular to the central axis, such that
Each convex portion in the second region has a third slope portion and a fourth slope portion,
The third sloped portion is arranged with respect to a plane perpendicular to the central axis of the insertion portion so as to totally reflect the light from the proximal end in a cross section along a tangential direction around the center of the partial circle. The fourth sloped portion has a central axis of the insertion portion such that the light from the proximal end portion is transmitted in a cross section along a tangential direction around the center of the partial circle. having a fourth angle with respect to a plane orthogonal to
The illumination optical system according to claim 10.
前記照明窓は、前記部分円形を有し、
前記複数の凸部は、前記部分円形の半径が互いに異なる複数の円弧に沿って、前記光学素子の前記入射部に設けられ、
前記部分円形の中心側の第１の領域では、前記先端部の前記先端面を先端側から見たときに、前記挿入部の中心軸から外径方向に第１の光を出射し、前記部分円形の前記第１の領域の外側の第２の領域では、前記先端部の前記先端面を先端側から見たときに、前記挿入部の前記中心軸に向かう内径方向に出射される第２の光を出射する、
請求項１に記載の照明光学系。 The optical element has a Fresnel lens having a plurality of convex portions,
The illumination window has the partially circular shape,
The plurality of convex portions are provided at the incident portion of the optical element along a plurality of circular arcs in which the radii of the partial circles are different from each other,
In the first region on the center side of the partial circle, when the distal end surface of the distal end section is viewed from the distal end side, the first light is emitted in the outer radial direction from the central axis of the insertion section, and In a second region outside the circular first region, when the distal end surface of the distal end portion is viewed from the distal end side, a second emitted light is emitted in an inner radial direction toward the central axis of the insertion portion. emits light,
The illumination optical system according to claim 1.
前記挿入部の先端部から入射光として光が入射する入射部と、照明光として前記光を出射する出射部とを有する光学素子を有し、
前記光学アダプタの先端面に設けられた観察窓と、
前記光学素子の前記先端部側に設けられ、前記先端部を先端側から見たときにリング状又は部分円形を有し、前記出射部からの前記照明光を出射する照明窓と、
を有し、
前記入射部又は前記出射部は、前記出射部から出射される前記光を拡散させる少なくとも１つ以上の凸部を有する拡散部を有し、
前記少なくとも１つ以上の凸部は、前記先端部の前記先端面を先端側から見たときに、前記挿入部の中心軸から外径方向に出射される第１の光よりも、前記挿入部の前記中心に向かう内径方向に出射される第２の光又は前記挿入部の外周部の接線方向に出射される第３の光の方が多くなるように、前記出射部から出射される光を拡散させるよう構成される、
光学アダプタ。 An optical adapter that can be attached to a distal end of an endoscope having an insertion section that is inserted into a subject,
an optical element having an entrance part into which light enters as incident light from the distal end of the insertion part, and an exit part which emits the light as illumination light;
an observation window provided on the distal end surface of the optical adapter;
an illumination window provided on the distal end side of the optical element, having a ring shape or a partially circular shape when the distal end section is viewed from the distal end side, and emitting the illumination light from the emitting section;
has
The incidence part or the emission part has a diffusion part having at least one convex part that diffuses the light emitted from the emission part,
When the distal end surface of the distal end section is viewed from the distal end side, the at least one or more convex portions are arranged so that the first light beam emitted from the central axis of the insertion section in the outer radial direction is smaller than the first light emitted from the insertion section. The light emitted from the emitting part is adjusted such that the second light emitted in the inner radial direction toward the center of the insertion part or the third light emitted in the tangential direction of the outer peripheral part of the insertion part is larger. configured to diffuse;
optical adapter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2021090645A JP7630355B2 (en) | 2021-05-28 | 2021-05-28 | Illumination optical system, optical adapter and endoscope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2021090645A JP7630355B2 (en) | 2021-05-28 | 2021-05-28 | Illumination optical system, optical adapter and endoscope |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2022182872A JP2022182872A (en) | 2022-12-08 |
| JP2022182872A5 true JP2022182872A5 (en) | 2024-01-22 |
| JP7630355B2 JP7630355B2 (en) | 2025-02-17 |
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ID=84328997
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| Application Number | Title | Priority Date | Filing Date |
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| JP2021090645A Active JP7630355B2 (en) | 2021-05-28 | 2021-05-28 | Illumination optical system, optical adapter and endoscope |
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| JP (1) | JP7630355B2 (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009116969A1 (en) | 2008-03-20 | 2009-09-24 | Invuity, Inc. | Illuminated cannula |
| EP3217857B1 (en) | 2014-11-12 | 2022-02-09 | Invuity, Inc. | Improved thermally controlled illumination devices |
| JP6309654B2 (en) | 2014-12-17 | 2018-04-11 | オリンパス株式会社 | Endoscope illumination device and endoscope |
| JP6606361B2 (en) | 2015-06-29 | 2019-11-13 | オリンパス株式会社 | Omnidirectional illumination optical member, endoscope omnidirectional illumination optical system including the same, and omnidirectional observation endoscope |
| US9814377B2 (en) | 2015-12-03 | 2017-11-14 | Welch Allyn, Inc. | Medical instrument having LED illumination system |
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