JP7011715B2 - Endoscope Illumination Optical System and Endoscope - Google Patents

Endoscope Illumination Optical System and Endoscope Download PDF

Info

Publication number
JP7011715B2
JP7011715B2 JP2020529981A JP2020529981A JP7011715B2 JP 7011715 B2 JP7011715 B2 JP 7011715B2 JP 2020529981 A JP2020529981 A JP 2020529981A JP 2020529981 A JP2020529981 A JP 2020529981A JP 7011715 B2 JP7011715 B2 JP 7011715B2
Authority
JP
Japan
Prior art keywords
endoscope
tip
optical system
illumination optical
chamfered
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.)
Active
Application number
JP2020529981A
Other languages
Japanese (ja)
Other versions
JPWO2020012697A1 (en
Inventor
研 河西
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Olympus Corp
Original Assignee
Olympus Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Olympus Corp filed Critical Olympus Corp
Publication of JPWO2020012697A1 publication Critical patent/JPWO2020012697A1/en
Application granted granted Critical
Publication of JP7011715B2 publication Critical patent/JP7011715B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/06—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements
    • A61B1/07—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements using light-conductive means, e.g. optical fibres
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G02B23/24—Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Surgery (AREA)
  • Optics & Photonics (AREA)
  • Biomedical Technology (AREA)
  • Public Health (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Pathology (AREA)
  • Medical Informatics (AREA)
  • Veterinary Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Molecular Biology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Radiology & Medical Imaging (AREA)
  • Biophysics (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • Instruments For Viewing The Inside Of Hollow Bodies (AREA)
  • Endoscopes (AREA)

Description

本発明は、内視鏡照明光学系および内視鏡に関するものである。 The present invention relates to an endoscope illumination optical system and an endoscope.

バッテリで駆動することが可能なモバイル内視鏡のニーズがあり、低消費電力かつ高輝度な光源として半導体レーザ光源（以下、ＬＤ光源という。）を用いることが提案されている（例えば、特許文献１参照。）。 There is a need for a mobile endoscope that can be driven by a battery, and it has been proposed to use a semiconductor laser light source (hereinafter referred to as an LD light source) as a light source having low power consumption and high brightness (for example, Patent Document). See 1.).

国際公開第２０１６／１０３４１１号公報International Publication No. 2016/103411

ＬＤ光源は、配光の小さな短波長の励起光と、励起光を蛍光体に照射して発生させた、配光の大きな長波長の蛍光とを合成した光源であるため、励起光と蛍光とで配光が異なり、照明光として用いると色むらが発生し易い。 The LD light source is a light source that combines short-wavelength excitation light with a small light distribution and long-wavelength fluorescence with a large light distribution generated by irradiating the phosphor with the excitation light. The light distribution is different, and when used as illumination light, color unevenness is likely to occur.

本発明は、低消費電力かつ高輝度のＬＤ光源を照明光として使用しつつ、色むらの発生を低減することができる内視鏡照明光学系および内視鏡を提供する。 The present invention provides an endoscope illumination optical system and an endoscope capable of reducing the occurrence of color unevenness while using an LD light source having low power consumption and high brightness as illumination light.

本発明の一態様は、内視鏡の先端を被覆する位置に配置される光学的に透明な樹脂製の先端カバーと、該先端カバーの基端側に配置され、前記先端カバーを透過して前記内視鏡の前方に励起光と蛍光とを含む照明光を射出する半導体レーザ光源とを備え、前記先端カバーの先端面の外周縁が、Ｒ面取りされた曲面形状のＲ面取り面を有し、前記Ｒ面取り面のうちピーク強度の前記励起光が透過する領域に、前記先端面に対して傾斜した面で構成された切り欠き部を有する内視鏡照明光学系である。 One aspect of the present invention is an optically transparent resin tip cover arranged at a position covering the tip of the endoscope, and an optically transparent tip cover arranged on the base end side of the tip cover and transmitted through the tip cover. A semiconductor laser light source that emits illumination light including excitation light and fluorescence is provided in front of the endoscope, and the outer peripheral edge of the front end surface of the tip cover has an R chamfered surface having an R chamfered curved surface shape. This is an endoscope illumination optical system having a notch portion formed of a surface inclined with respect to the tip surface in a region of the R chamfered surface through which the excitation light having a peak intensity is transmitted .

本発明の一実施形態に係る内視鏡照明光学系を備える内視鏡の先端部を示す縦断面である。It is a vertical cross section which shows the tip part of the endoscope provided with the endoscope illumination optical system which concerns on one Embodiment of this invention. 図１の内視鏡照明光学系を先端側から長手軸方向に見た正面図である。It is a front view which looked at the endoscope illumination optical system of FIG. 1 from the tip side in the longitudinal axis direction. 図１の内視鏡照明光学系の半導体レーザ光源により射出される蛍光および励起光の配光の一例を示す図である。It is a figure which shows an example of the light distribution of fluorescence and excitation light emitted by the semiconductor laser light source of the endoscope illumination optical system of FIG. 図１の内視鏡照明光学系の先端部を部分的に示す拡大縦断面図である。It is an enlarged vertical sectional view partially showing the tip part of the endoscope illumination optical system of FIG. 1. 図１の内視鏡照明光学系の第１の変形例の先端部を部分的に示す拡大縦断面図である。FIG. 3 is an enlarged vertical sectional view partially showing a tip portion of a first modification of the endoscope illumination optical system of FIG. 1. 図５の内視鏡照明光学系を先端側から長手軸方向に見た正面図である。It is a front view which looked at the endoscope illumination optical system of FIG. 5 from the tip side in the longitudinal axis direction. 図１の内視鏡照明光学系の第２の変形例の先端部を先端側から長手軸方向に見た正面図である。It is a front view which looked at the tip part of the 2nd modification of the endoscope illumination optical system of FIG. 1 from the tip side in the longitudinal axis direction. 図１の内視鏡照明光学系の第３の変形例の先端部を先端側から長手軸方向に見た正面図である。It is a front view which looked at the tip part of the 3rd modification of the endoscope illumination optical system of FIG. 1 from the tip side in the longitudinal axis direction. 図８の内視鏡照明光学系の先端部を部分的に示す拡大側面図である。FIG. 8 is an enlarged side view partially showing the tip of the endoscope illumination optical system of FIG.

本発明の第１の実施形態に係る内視鏡照明光学系１について、図面を参照して以下に説明する。
本実施形態に係る内視鏡照明光学系１は、図１に示されるように、内視鏡１００の挿入部１１０の先端を被覆する位置に配置される先端カバー２と、先端カバー２よりも基端側に配置された半導体レーザ光源３とを備えている。図中、符号４は、被写体から戻る戻り光を撮影する撮影光学系である。The endoscope illumination optical system 1 according to the first embodiment of the present invention will be described below with reference to the drawings.
As shown in FIG. 1, the endoscope illumination optical system 1 according to the present embodiment has a tip cover 2 arranged at a position covering the tip of the insertion portion 110 of the endoscope 100 and a tip cover 2 more than the tip cover 2. It includes a semiconductor laser light source 3 arranged on the proximal end side. In the figure, reference numeral 4 is a photographing optical system for photographing the return light returning from the subject.

先端カバー２は、光学的に透明な樹脂材料により構成され、挿入部１１０の長手軸に直交する先端面５と、長手軸を中心とする円筒面からなる外周面６と、先端面５と外周面６との境界に位置する先端面５の外周縁に配置されたＲ面取り面７とを備えている。
先端カバー２には先端面５とは反対側の基端面８に、半導体レーザ光源３を配置する孔９が、例えば、周方向に間隔をあけて２箇所に設けられている。The tip cover 2 is made of an optically transparent resin material, and has a tip surface 5 orthogonal to the longitudinal axis of the insertion portion 110, an outer peripheral surface 6 composed of a cylindrical surface centered on the longitudinal axis, and a tip surface 5 and an outer circumference. It is provided with an R chamfered surface 7 arranged on the outer peripheral edge of the tip surface 5 located at the boundary with the surface 6.
The tip cover 2 is provided with holes 9 for arranging the semiconductor laser light source 3 at two locations, for example, at intervals in the circumferential direction on the base end surface 8 opposite to the tip surface 5.

各孔９内には、半導体レーザ光源３が配置されている。
半導体レーザ光源３は、図示しない光源部からの励起光を導光するライトガイドファイバ１０と、ライトガイドファイバ１０により導光されてきた励起光が入射されることにより蛍光を発生する蛍光体１１と、蛍光体１１から発せられた蛍光を挿入部１１０の長手軸に沿う方向に偏向する円錐ミラー１２と、蛍光体１１の前方に配置された散乱体を含むシリコン１３とを備えている。これにより、半導体レーザ光源３は、蛍光体１１から発せられた蛍光と、蛍光体１１を透過してシリコン１３に含まれる散乱体により散乱された励起光とを合波した照明光を、先端カバー２を透過して内視鏡１００の前方に射出する。A semiconductor laser light source 3 is arranged in each hole 9.
The semiconductor laser light source 3 includes a light guide fiber 10 that guides excitation light from a light source unit (not shown), and a phosphor 11 that generates fluorescence when the excitation light guided by the light guide fiber 10 is incident. , A conical mirror 12 that deflects the fluorescence emitted from the phosphor 11 in a direction along the longitudinal axis of the insertion portion 110, and a silicon 13 including a scatterer arranged in front of the phosphor 11. As a result, the semiconductor laser light source 3 covers the tip of the illumination light, which is a combination of the fluorescence emitted from the phosphor 11 and the excitation light transmitted through the phosphor 11 and scattered by the scatterer contained in the silicon 13. 2 is transmitted and ejected in front of the endoscope 100.

本実施形態においては、先端カバー２の先端面５に、２箇所の孔９に対応する位置に、それぞれ切り欠き部１４が設けられている。
本実施形態においては、切り欠き部１４は、図１および図２に示されるように、少なくとも照明光が通過する領域を包含する位置に配置されているＲ面取り面７を部分的に、先端面５に対して傾斜する平面に置き換えた形態を有している。In the present embodiment, notches 14 are provided on the tip surface 5 of the tip cover 2 at positions corresponding to the two holes 9.
In the present embodiment, the cutout portion 14 partially has a tip surface of the R chamfered surface 7 arranged at a position including at least a region through which the illumination light passes, as shown in FIGS. 1 and 2. It has a form replaced with a plane inclined with respect to 5.

このように構成された本実施形態に係る内視鏡照明光学系１の作用について以下に説明する。
本実施形態に係る内視鏡照明光学系１によれば、半導体レーザ光源３のライトガイドファイバ１０を経由して伝播されてきた励起光が蛍光体に入射すると、一部の励起光が蛍光物質を励起して蛍光を発生させ、他の一部の励起光が蛍光体１１を透過した後、シリコン１３内に含まれている散乱体により散乱され、蛍光と合波されて先端カバー２から前方に射出される。The operation of the endoscope illumination optical system 1 according to the present embodiment configured in this way will be described below.
According to the endoscope illumination optical system 1 according to the present embodiment, when the excitation light propagated through the light guide fiber 10 of the semiconductor laser light source 3 is incident on the phosphor, a part of the excitation light is a fluorescent substance. Is excited to generate fluorescence, and after some other excitation light passes through the phosphor 11, it is scattered by the scatterer contained in the silicon 13, combined with the fluorescence, and forward from the tip cover 2. Is ejected to.

この場合において、ライトガイドファイバ１０の中心付近では、指向性の高い低ＮＡの励起光が直進し、蛍光体１１に入射し、蛍光体１１において発せられた蛍光が長手軸方向に直交する方向に発光される。この後、円錐ミラー１２内面によって反射されて長手軸方向に偏向される。これにより、図３に示されるように、蛍光の配光は０°付近でピークとなる。一方、蛍光体１１を透過した励起光はシリコン１３に含まれる散乱体の濃度に依存し、１０°から４０°の範囲にピークを有する配光となる。図３は２５°の方向にピークを有する場合を示している。 In this case, in the vicinity of the center of the light guide fiber 10, highly directional low NA excitation light travels straight, enters the phosphor 11, and the fluorescence emitted by the phosphor 11 is orthogonal to the longitudinal axis direction. It emits light. After that, it is reflected by the inner surface of the conical mirror 12 and deflected in the longitudinal direction. As a result, as shown in FIG. 3, the fluorescence light distribution peaks near 0 °. On the other hand, the excitation light transmitted through the phosphor 11 depends on the concentration of the scatterer contained in the silicon 13, and the light distribution has a peak in the range of 10 ° to 40 °. FIG. 3 shows the case where the peak is in the direction of 25 °.

先端カバー２の先端面５の外周縁には、挿入部１１０を体腔内に挿入する際に、体腔内壁を傷つけないために、全周にわたってＲ面取り面７が設けられている。Ｒ面取り面７を照明光が通過すると、Ｒ面取り面７は光学的なレンズ作用を生じさせる。特に、図３に示されるように、蛍光は直進し、励起光は中心から離れた外側にピークを有する配光を備えているので、励起光の配光のピークの方向にＲ面取り面７が存在すると、励起光が大きく収斂される一方、蛍光が受ける収斂は小さい。収斂作用の相対差により色むらが発生する。 An R chamfered surface 7 is provided on the outer peripheral edge of the tip surface 5 of the tip cover 2 over the entire circumference so as not to damage the inner wall of the body cavity when the insertion portion 110 is inserted into the body cavity. When the illumination light passes through the R chamfered surface 7, the R chamfered surface 7 causes an optical lens action. In particular, as shown in FIG. 3, since the fluorescence travels straight and the excitation light has a light distribution having a peak on the outside away from the center, the R chamfering surface 7 is in the direction of the peak of the light distribution of the excitation light. When present, the excitation light is largely converged, while the fluorescence is less convergent. Color unevenness occurs due to the relative difference in astringent action.

本実施形態によれば、図４に示されるように、照明光が透過する領域、特に、ピーク強度の励起光が透過する領域のＲ面取り面７が平面に置き換えられているので、先端カバー２を透過する蛍光および励起光に作用する収斂作用に相対差が発生せず、色むらの発生を抑えることができるという利点がある。 According to the present embodiment, as shown in FIG. 4, the R chamfered surface 7 in the region through which the illumination light is transmitted, particularly the region through which the excitation light of peak intensity is transmitted, is replaced with a flat surface, so that the tip cover 2 is used. There is no relative difference in the convergence action acting on the fluorescence transmitted through and the excitation light, and there is an advantage that the occurrence of color unevenness can be suppressed.

本実施形態においては、先端カバー２が、先端面５に対して傾斜した平面によりＲ面取り面７の一部を切り欠き部１４として置き換えた形態を有することとしたが、これに代えて、図５および図６に示されるように、さらに大きな平面により置き換えることにしてもよい。 In the present embodiment, the tip cover 2 has a form in which a part of the R chamfered surface 7 is replaced with a cutout portion 14 by a flat surface inclined with respect to the tip surface 5, but instead of this, the figure shows. It may be replaced by a larger plane as shown in 5 and 6.

図７に示されるように、切り欠き部１４としては、全周にわたって、内視鏡１００の長手軸を中心として、内視鏡１００の前方に向かって凸面となる円錐面で置き換えることにしてもよい。
これにより、蛍光および励起光に均一かつ微小な収斂作用を生じさせて、色むらの発生を防止することができる。As shown in FIG. 7, the notch portion 14 may be replaced with a conical surface that becomes a convex surface toward the front of the endoscope 100 with the longitudinal axis of the endoscope 100 as the center over the entire circumference. good.
As a result, it is possible to cause a uniform and minute astringent action on the fluorescence and the excitation light, and prevent the occurrence of color unevenness.

図８および図９に示されるように、切り欠き部１４としては、内視鏡１００の長手軸に直交する軸線を中心として、内視鏡１００の前方に向かって凹面となる円錐面で置き換えることにしてもよい。
これにより、蛍光および励起光に均一かつ微小な発散作用を生じさせて、色むらの発生を防止することができる。As shown in FIGS. 8 and 9, the notch portion 14 is replaced with a conical surface that becomes concave toward the front of the endoscope 100 with an axis orthogonal to the longitudinal axis of the endoscope 100 as the center. You may do it.
As a result, it is possible to cause uniform and minute divergence of fluorescence and excitation light and prevent the occurrence of color unevenness.

上記目的を達成するために、本発明は以下の手段を提供する。
本発明の一態様は、内視鏡の先端を被覆する位置に配置される光学的に透明な樹脂製の先端カバーと、該先端カバーの基端側に配置され、前記先端カバーを透過して前記内視鏡の前方に照明光を射出する半導体レーザ光源とを備え、前記先端カバーの先端面の外周縁が、Ｒ面取りされた曲面形状のＲ面取り面を有するとともに、少なくとも前記照明光が通過する領域の前記Ｒ面取り面を部分的に平面または円錐面に置き換えた切り欠き部を有する内視鏡照明光学系である。In order to achieve the above object, the present invention provides the following means.
One aspect of the present invention is an optically transparent resin tip cover arranged at a position covering the tip of the endoscope, and an optically transparent resin tip cover arranged on the base end side of the tip cover and passing through the tip cover. A semiconductor laser light source that emits illumination light is provided in front of the endoscope, and the outer peripheral edge of the front end surface of the tip cover has an R chamfered curved surface, and at least the illumination light passes through. It is an endoscope illumination optical system having a notch portion in which the R chamfered surface of the region to be formed is partially replaced with a flat surface or a conical surface.

本態様によれば、内視鏡の先端を被覆する位置に配置される先端カバーの先端面の外周縁に設けられたＲ面取り面により、体腔内への内視鏡の挿入をスムーズに行うことができる。光源として、低消費電力かつ高輝度の半導体レーザ光源を用いることにより、バッテリ駆動の内視鏡を実現することができる。 According to this aspect, the endoscope can be smoothly inserted into the body cavity by the R chamfered surface provided on the outer peripheral edge of the tip surface of the tip cover arranged at the position covering the tip of the endoscope. Can be done. By using a low power consumption and high brightness semiconductor laser light source as the light source, a battery-powered endoscope can be realized.

半導体レーザ光源から発せられた照明光は、光学的に透明な樹脂製の先端カバーを透過して内視鏡の前方に射出される。半導体レーザ光源から射出される照明光には、短波長の励起光と長波長の蛍光とが含まれる。励起光のピークの方向にＲ面取り面が存在する場合にはレンズ効果によって励起光が収斂するが、本態様によれば、照明光が通過する領域のＲ面取り面が切り欠き部によって平面または円錐面に置き換えられているので、励起光の収斂作用を低減することができ、色むらの発生を抑制することができる。 Illumination light emitted from a semiconductor laser light source passes through an optically transparent resin tip cover and is emitted in front of the endoscope. Illumination light emitted from a semiconductor laser light source includes short-wavelength excitation light and long-wavelength fluorescence. When the R chamfered surface is present in the direction of the peak of the excitation light, the excitation light is converged by the lens effect. Since it is replaced with a surface, the converging action of the excitation light can be reduced, and the occurrence of color unevenness can be suppressed.

上記態様においては、前記先端カバーが、前記内視鏡の長手軸に直交する平面からなる前記先端面と、前記長手軸を中心とする円筒面からなる外周面と、該外周面と前記先端面との境界に配置される前記Ｒ面取り面とを備えていてもよい。
この構成により、先端面と外周面との境界に配置されるＲ面取り面が、切り欠き部によって平面または円錐面に置き換えられ、励起光の収斂作用を低減することができ、色むらの発生を抑制することができる。In the above embodiment, the tip cover has the tip surface formed of a plane orthogonal to the longitudinal axis of the endoscope, an outer peripheral surface formed of a cylindrical surface centered on the longitudinal axis, and the outer peripheral surface and the tip surface. It may be provided with the R chamfered surface arranged at the boundary with and.
With this configuration, the R chamfered surface arranged at the boundary between the tip surface and the outer peripheral surface is replaced with a flat surface or a conical surface by the notch, and the astringent action of the excitation light can be reduced, causing color unevenness. It can be suppressed.

上記態様においては、前記切り欠き部が、前記Ｒ面取り面のみを切り欠いた形状に形成されていてもよい。
この構成により、励起光が内視鏡の長手軸を含む平面に沿って湾曲する曲面形状の表面を通過しないので、励起光の収斂作用を低減することができ、色むらの発生を抑制することができる。In the above aspect, the cutout portion may be formed in a shape in which only the R chamfered surface is cut out.
With this configuration, the excitation light does not pass through the curved surface that curves along the plane including the longitudinal axis of the endoscope, so that the astringent action of the excitation light can be reduced and the occurrence of color unevenness can be suppressed. Can be done.

上記態様においては、前記切り欠き部が、前記先端面および前記Ｒ面取り面の両方にわたって連続する平面または円錐面により切り欠いた形状に形成されていてもよい。
この構成により、先端カバーの表面における励起光の屈折方向が不連続に変化することを防止して、色むらの発生をさらに抑制することができる。In the above aspect, the notch may be formed in a shape notched by a continuous flat surface or a conical surface over both the tip surface and the R chamfered surface.
With this configuration, it is possible to prevent the refraction direction of the excitation light on the surface of the tip cover from changing discontinuously, and further suppress the occurrence of color unevenness.

１ 内視鏡照明光学系
２ 先端カバー
３ 半導体レーザ光源
５ 先端面
６ 外周面
７ Ｒ面取り面
１４ 切り欠き部
１００ 内視鏡1 Endoscope illumination optical system 2 Tip cover 3 Semiconductor laser light source 5 Tip surface 6 Outer surface 7 R chamfered surface 14 Notch 100 Endoscope

Claims (6)

内視鏡の先端を被覆する位置に配置される光学的に透明な樹脂製の先端カバーと、
該先端カバーの基端側に配置され、前記先端カバーを透過して前記内視鏡の前方に励起光と蛍光とを含む照明光を射出する半導体レーザ光源とを備え、
前記先端カバーの先端面の外周縁が、Ｒ面取りされた曲面形状のＲ面取り面を有し、
前記Ｒ面取り面のうちピーク強度の前記励起光が透過する領域に、前記先端面に対して傾斜した面で構成された切り欠き部を有する内視鏡照明光学系。 An optically transparent resin tip cover placed at a position that covers the tip of the endoscope,
It is provided with a semiconductor laser light source which is arranged on the base end side of the tip cover and emits illumination light including excitation light and fluorescence in front of the endoscope through the tip cover.
The outer peripheral edge of the tip surface of the tip cover has an R chamfered curved surface.
An endoscope illumination optical system having a notch portion formed of a surface inclined with respect to the tip surface in a region of the R chamfered surface through which the excitation light having a peak intensity is transmitted . 前記切り欠き部が、平面または円錐面である請求項１に記載の内視鏡照明光学系。 The endoscope illumination optical system according to claim 1, wherein the notch is a flat surface or a conical surface. 前記先端カバーが、前記内視鏡の長手軸に直交する平面からなる前記先端面と、前記長手軸を中心とする円筒面からなる外周面と、該外周面と前記先端面との境界に配置される前記Ｒ面取り面とを備える請求項１に記載の内視鏡照明光学系。 The tip cover is arranged at the boundary between the tip surface formed of a plane orthogonal to the longitudinal axis of the endoscope, the outer peripheral surface formed of a cylindrical surface centered on the longitudinal axis, and the outer peripheral surface and the tip surface. The endoscope illumination optical system according to claim 1 , further comprising the R chamfered surface. 前記切り欠き部が、前記Ｒ面取り面のみを切り欠いた形状に形成されている請求項３に記載の内視鏡照明光学系。 The endoscope illumination optical system according to claim 3 , wherein the cutout portion is formed in a shape in which only the R chamfered surface is cut out. 前記切り欠き部が、前記先端面および前記Ｒ面取り面の両方にわたって連続する平面または円錐面により切り欠いた形状に形成されている請求項３に記載の内視鏡照明光学系。 The endoscope illumination optical system according to claim 3 , wherein the notch is formed in a shape notched by a continuous flat surface or a conical surface over both the tip surface and the R chamfered surface. 請求項１に記載の内視鏡照明光学系を備える内視鏡。 An endoscope comprising the endoscope illumination optical system according to claim 1.
JP2020529981A 2018-07-12 2019-03-01 Endoscope Illumination Optical System and Endoscope Active JP7011715B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2018132033 2018-07-12
JP2018132033 2018-07-12
PCT/JP2019/008095 WO2020012697A1 (en) 2018-07-12 2019-03-01 Endoscope illumination optics

Publications (2)

Publication Number Publication Date
JPWO2020012697A1 JPWO2020012697A1 (en) 2021-06-03
JP7011715B2 true JP7011715B2 (en) 2022-01-27

Family

ID=69141710

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2020529981A Active JP7011715B2 (en) 2018-07-12 2019-03-01 Endoscope Illumination Optical System and Endoscope

Country Status (2)

Country Link
JP (1) JP7011715B2 (en)
WO (1) WO2020012697A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014087482A (en) 2012-10-30 2014-05-15 Panasonic Corp Endoscope and insertion portion for endoscope
WO2016088267A1 (en) 2014-12-05 2016-06-09 オリンパス株式会社 Illumination device and endoscope
WO2016103411A1 (en) 2014-12-25 2016-06-30 オリンパス株式会社 Light source device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014087482A (en) 2012-10-30 2014-05-15 Panasonic Corp Endoscope and insertion portion for endoscope
WO2016088267A1 (en) 2014-12-05 2016-06-09 オリンパス株式会社 Illumination device and endoscope
WO2016103411A1 (en) 2014-12-25 2016-06-30 オリンパス株式会社 Light source device

Also Published As

Publication number Publication date
JPWO2020012697A1 (en) 2021-06-03
WO2020012697A1 (en) 2020-01-16

Similar Documents

Publication Publication Date Title
JP6131724B2 (en) Vehicle lighting
US8356924B2 (en) Light source apparatus
JP6192399B2 (en) Lighting device
WO2013168594A1 (en) Endoscope illumination optical assembly and endoscope
WO2015005159A1 (en) Illumination device
JP2017062963A (en) Vehicle lamp
JP6073718B2 (en) Optical lens
US20120195059A1 (en) Lighting Fixture Having an Optical Wave Guide and a Descartes Lens or Descartes Reflector
JP2014175126A (en) Spotlight
JP6280683B2 (en) Tubular observation device
JP2012243539A (en) Light guide lens and vehicular lamp
JP7011715B2 (en) Endoscope Illumination Optical System and Endoscope
JP2018041711A (en) Lens including wraparound light guide part and vehicular lighting fixture
JP2016157552A (en) Light guide rod and luminaire
JP7534318B2 (en) Fiber-coupled diode laser module and method of assembling same - Patents.com
JP2010020920A (en) Linear light source device and image reading device
KR102510943B1 (en) lamp for vehicle
JP6300080B2 (en) Light emitting device and vehicle lamp
JP2014023815A (en) Light source device
JP2012204547A (en) Illumination device
WO2024043042A1 (en) Vehicle lamp
WO2024043045A1 (en) Vehicle lamp
JP2003521732A (en) Optical coupling system
US20220155580A1 (en) Endoscope and endoscope system
JP2013033622A (en) Lamp fitting

Legal Events

Date Code Title Description
A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20201026

A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20201026

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20210727

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20210908

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20211221

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20220114