JPS61177417A - Aperture device of light source device for endoscope - Google Patents
Aperture device of light source device for endoscopeInfo
- Publication number
- JPS61177417A JPS61177417A JP60018194A JP1819485A JPS61177417A JP S61177417 A JPS61177417 A JP S61177417A JP 60018194 A JP60018194 A JP 60018194A JP 1819485 A JP1819485 A JP 1819485A JP S61177417 A JPS61177417 A JP S61177417A
- Authority
- JP
- Japan
- Prior art keywords
- light
- aperture
- light source
- endoscope
- light guide
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4298—Coupling light guides with opto-electronic elements coupling with non-coherent light sources and/or radiation detectors, e.g. lamps, incandescent bulbs, scintillation chambers
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Microscoopes, Condenser (AREA)
- Optical Couplings Of Light Guides (AREA)
- Endoscopes (AREA)
- Instruments For Viewing The Inside Of Hollow Bodies (AREA)
Abstract
Description
【発明の詳細な説明】
［発明の技術分野］
本発明は被写体への照射光６を可変するのに適した内視
鏡用光源装置の絞り装置にＰＡす°る。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an aperture device of an endoscope light source device suitable for varying the amount of light 6 irradiated onto a subject.
［発明の技術的青石とその問題点］
近年、内視鏡においても固体！ａ像素子を用いてブラウ
ン管等の表示装置に被写体の映像を表示可能とするもの
が実現化される状況にある。[Technical blue stones of invention and their problems] In recent years, solids are also used in endoscopes! 2. Description of the Related Art It is now possible to realize an image of a subject that can be displayed on a display device such as a cathode ray tube using an a-image element.
上記固体撮像素子を用いた電子式の内視鏡は、イメージ
ガイドファイバに光学像を結像するものに比べ、映像を
記録することも容易であるし、高集積化技術の進展と共
に、今後ますます小型にできるという利点を有する。Electronic endoscopes that use the solid-state imaging devices described above are easier to record images than those that form optical images on image guide fibers, and will continue to increase in the future as highly integrated technology progresses. It has the advantage that it can be made smaller.
しかしながら上記固体撮像素子を用いた場合、囮像面の
受光素子に入射される光量が大きり°ぎると、過大な電
荷が周辺に漏れ、再生画面上においてはにじんでブルー
ミング現象が生じ、その部分は会を忠実に再生できなく
なると共に、正規の状態に復帰するまで撮像不能になる
という問題がある。However, when using the above-mentioned solid-state image sensor, if the amount of light incident on the light-receiving element on the decoy image plane is too large, excessive charge leaks to the surrounding area, causing blurring and blooming on the playback screen. There is a problem that it becomes impossible to faithfully reproduce the video, and that it becomes impossible to take images until the normal state is restored.
上記ブルーミング現象が生じないように照明光の強度を
光源装置側で制御するための絞り装置の従来例として第
６図に示すようなものがある。FIG. 6 shows a conventional aperture device for controlling the intensity of illumination light on the light source device side so as to prevent the blooming phenomenon described above from occurring.
即ち、光源としての放電ランプ５１の光を凹面状の反射
鏡５２で反射して略平行光束にし、この平行光束を集光
レンズ５３ｒ：照明光伝達手段としてのライトガイドフ
ァイバ５４の入ＤＡ Ｇａに照射する光学系において、
集光レンズ５３とライトガイドファイバ５４との間の光
路上に第７図に示ずように円板の中心部と、円板の一部
を扇状に切欠いた形状の絞り５５を配設し、この絞り５
５を（第７図では下方に）移動することによって、その
移動ａに応じて光束の一部を遮光してライトガイドファ
イバ５４への入射光量を可変し、このライトガイドファ
イバ５４の他端から出射される照明光量を調整するもの
である。That is, the light from the discharge lamp 51 as a light source is reflected by the concave reflecting mirror 52 to form a substantially parallel light flux, and this parallel light flux is transmitted to a condenser lens 53r: an input DA Ga of a light guide fiber 54 as an illumination light transmission means. In the optical system for irradiation,
As shown in FIG. 7, on the optical path between the condenser lens 53 and the light guide fiber 54, a diaphragm 55 in the shape of a fan-shaped notch in the center of a disk and a part of the disk is disposed, This aperture 5
5 (downward in FIG. 7), a part of the light beam is blocked according to the movement a, and the amount of light incident on the light guide fiber 54 is varied, and the amount of light incident on the light guide fiber 54 is changed. This adjusts the amount of illumination light emitted.
しかしながら、この従来例は、絞り５５で絞りこんでい
くと、光束が周辺部から遮光されるので、ライトガイド
ファイバ５４の先端面から被写体←対象物）側に出射さ
れる配光特性が変化してしまう。又、ライトガイドファ
イバ５４は一般に波長によって間口数が異るため、絞り
岳によって対象物側に照射される照明光の分光特性も変
化してしまうという問題点があった。However, in this conventional example, when the aperture 55 is used to narrow down the light beam, the light beam is blocked from the peripheral area, so the light distribution characteristics emitted from the tip surface of the light guide fiber 54 toward the subject (object) change. I end up. Furthermore, since the number of openings of the light guide fiber 54 generally differs depending on the wavelength, there is a problem in that the spectral characteristics of the illumination light irradiated onto the object side change depending on the aperture.
［発明の目的］
本発明は、上記問題点に鑑みてなされたもので、照明強
度を可変した場合にも配光特性及び分光特性が変化しな
いようにした内視鏡用光源装置の絞り装置を提供するこ
とを目的とする。[Object of the Invention] The present invention has been made in view of the above problems, and provides a diaphragm device for an endoscope light source device in which the light distribution characteristics and spectral characteristics do not change even when the illumination intensity is varied. The purpose is to provide.
［発明の概要］
本発明の内視鏡用光源装置の絞り装置は、光源の光をラ
イトガイドの入ｇＡ端に照射するまでの光路途上に、通
過光ｍを可変する絞りを設けるとともに、該光を拡散さ
せる拡散手段を設けて構成している。[Summary of the Invention] The diaphragm device of the light source device for an endoscope of the present invention is provided with a diaphragm that changes the passing light m on the optical path until the light from the light source is irradiated to the input gA end of the light guide. It is configured by providing a diffusion means for diffusing light.
［発明の実施例］ 以下図面を参照して本発明を具体的に説明する。[Embodiments of the invention] The present invention will be specifically described below with reference to the drawings.
第１図および第２図は本発明の第１実施例に係り、第１
図は第１実施例を備えた内視鏡を示し、第２図は第１図
の絞り装置部分を示す図である。FIG. 1 and FIG. 2 relate to a first embodiment of the present invention.
The figure shows an endoscope equipped with the first embodiment, and FIG. 2 is a diagram showing the aperture device portion of FIG. 1.
第１実施例を備えた内視鏡１は、細長の挿入部２の先端
側に結像用の対物レンズ３が配設され、該対物レンズ３
の結像位置にその１１１８面が臨むようにＣＯＤ （電
荷結合素子）等の固体撮像素子４が配設されている。こ
の固体撮像素子４の搬像面には光電変換機能を有する各
受光素子が規則正しく配列され、この搬像面の直前に３
原色の各波長の光のみをそれぞれ透過するモザイク状配
列の３原色フィルタ４△が取付けてあり、該固体撮像索
子４に印加されるクロック信号によって、それぞれ赤、
緑、胃の透過フィルタを通した各画素に対応した信号が
順次出力されるようになっており、該信号は低雑音指数
の前置増幅器（ブリーアンプ）５で増幅され、信号ケー
ブル６を経てビデオプロセス部７内のサンプルボールド
回路によって、各色信＝Ｒ，Ｇ、Ｂに分離されて取り込
まれ、それぞれ増幅された後、同期信号が重畳されて、
モニタ用カラーテレビジョン８に入力され、カラー画像
として表示可能とする撮像手段が形成されている。An endoscope 1 equipped with the first embodiment has an objective lens 3 for imaging disposed on the distal end side of an elongated insertion section 2.
A solid-state image sensing device 4 such as a COD (charge coupled device) is arranged so that its 1118th surface faces the image forming position. Each light receiving element having a photoelectric conversion function is regularly arranged on the image carrying surface of this solid-state image sensor 4, and three
A mosaic array of three primary color filters 4△ that transmit only light of each wavelength of the primary colors is attached, and depending on the clock signal applied to the solid-state imaging probe 4, red, red, and red, respectively, are transmitted.
Signals corresponding to each pixel are output sequentially through green and stomach transmission filters, and the signals are amplified by a preamplifier (Brie amplifier) 5 with a low noise figure, and then sent via a signal cable 6. The sample bold circuit in the video processing unit 7 separates and captures each color signal (R, G, B), amplifies each, and then superimposes a synchronization signal.
An imaging means is formed that allows the image to be input to a color monitor 8 and displayed as a color image.
上記挿入部２内には、対物レンズ３と隣接するように配
光レンズ９が配設され、該配光レンズ９内側にその出射
端が臨むようにして可撓性のファイババンドルで構成し
たライトガイド１０が挿通されている。A light distribution lens 9 is disposed in the insertion section 2 so as to be adjacent to the objective lens 3, and a light guide 10 constituted by a flexible fiber bundle with its output end facing inside the light distribution lens 9. is inserted.
上記ライトガイド１０の手元側後端は第１実施例の光源
装置１１にコネクタ１０Ａを介して着脱自在で装着でき
るようになっている。The proximal rear end of the light guide 10 can be detachably attached to the light source device 11 of the first embodiment via a connector 10A.
上記ライトガイド１０の照明光の入射端となる後端には
、放電ランプ等の照明用ランプ１２の照明光が凹面（放
物面）状の反ｒＪＪ！ｉ１３で反射されて略平行光束に
され、コンデンサレンズ１４で集光されて照射されるよ
うになっている。At the rear end of the light guide 10, which is the input end of the illumination light, the illumination light from the illumination lamp 12, such as a discharge lamp, has a concave (parabolic) shape. The light is reflected by i13 and turned into a substantially parallel light beam, which is condensed by a condenser lens 14 and irradiated.
一方、上記照明用ランプ１２およびコンデンサレンズ１
４の間の光路途上には、照明光量を可変制御できる絞り
１５と、この絞り１５により絞られた光を結像する結像
レンズ１６と、この結像レンズ１６の結像位置に拡散板
１７とが設けられている。上記絞り１５は、自動的にあ
るいは手動にて通過光量が可変調整できるようになって
おり、この絞り１５により絞られた光は結像レンズ１６
により拡散板１７上に結像される。そして、この拡散板
１７で拡散された光は大部分が上記コンデンサレンズ１
４で集光されてライトガイド１０の入射端に照射される
ようになっている。On the other hand, the illumination lamp 12 and the condenser lens 1
On the optical path between 4 and 4, there is a diaphragm 15 that can variably control the amount of illumination light, an imaging lens 16 that forms an image of the light focused by this diaphragm 15, and a diffuser plate 17 at the imaging position of this imaging lens 16. is provided. The aperture 15 is capable of automatically or manually adjusting the amount of light passing through the aperture 15, and the light focused by the aperture 15 is passed through the imaging lens 16.
An image is formed on the diffuser plate 17. Most of the light diffused by this diffuser plate 17 is transmitted to the condenser lens 1.
The light is focused at 4 and irradiated onto the incident end of the light guide 10.
このように構成された第１実施例によれば、内？！［１
を患部等の被写体に近づけて被写体を詳しく観察したり
、遠ざけて全体的特徴を把握したりする場合に、その距
離に応じて照明された被写体から大剣される光量が変化
し、従って最適となる照明強度が変化する。この状態で
の固体撮像素子４から出力される各画素に対応する信号
がビデオプロセス部７にとり込まれ、カラーテレビジョ
ン８でカラー表示される。これとともに、入射光譬に応
じで絞り１５が撮像に適した照明強度に調光される。又
、上記絞り１５を通過した光は結像レンズ１６により拡
散板１７に結像して、その散乱光がコンデンサレンズ１
４でライトガイド１０の入射端に照射される。従って、
絞り１５による光量制御を行っても、ライトガイド１０
に照射される光の間口角等は一定に保持されるとと乙に
、照射される光ｍが各部（単位面積）で均一に変化する
。According to the first embodiment configured in this way, the inner ? ! [1
When you bring the camera close to a subject such as an affected area to observe the subject in detail, or move it further away to grasp its overall characteristics, the amount of light emitted from the illuminated subject changes depending on the distance, so it is best to The illumination intensity changes. Signals corresponding to each pixel output from the solid-state image sensor 4 in this state are taken into the video processing section 7 and displayed in color on the color television 8. At the same time, the aperture 15 is dimmed to an illumination intensity suitable for imaging depending on the incident light. Further, the light passing through the aperture 15 is imaged on the diffuser plate 17 by the imaging lens 16, and the scattered light is transmitted to the condenser lens 1.
4, the light is irradiated onto the incident end of the light guide 10. Therefore,
Even if the light amount is controlled by the aperture 15, the light guide 10
If the frontage angle etc. of the light irradiated on the area are held constant, the irradiated light m changes uniformly in each part (unit area).
しかして、ライトガイド１０の出射端から対象物側に照
射さ°れる照明光の配光特性および分光特性は、光示調
整によらず一定に保持できる。Therefore, the light distribution characteristics and spectral characteristics of the illumination light irradiated from the output end of the light guide 10 toward the object can be maintained constant regardless of the light intensity adjustment.
第３図は本発明の第２実施例に係り、絞り装置部分を示
す図である。なお第１実施例と同一の部分および部材は
同一の符号を記す。FIG. 3 is a diagram showing a diaphragm device portion according to a second embodiment of the present invention. Note that the same parts and members as in the first embodiment are denoted by the same reference numerals.
この実施例の光源装置２１は反射鏡１３で平行光束にさ
れた照明用ランプ１２の光が結像レンズ１６で拡散板１
７に結像される途中に絞り１５が設けられている。他の
構成は第１実施例と同様である。In the light source device 21 of this embodiment, the light from the illumination lamp 12, which is made into a parallel beam by the reflecting mirror 13, passes through the imaging lens 16 to the diffuser plate 1.
A diaphragm 15 is provided in the middle of the image forming part 7. The other configurations are the same as in the first embodiment.
このような構成では、第１実施例と同様に作用する。Such a configuration operates in the same manner as the first embodiment.
第４図および第５図は本発明の第３および第４実施例に
係り、それぞれ絞り装置部分を示す図である。なお、第
１実施例と同一の部分Ｊ３よび部材は同一の符号を記す
。FIGS. 4 and 5 are views showing the aperture device portion, respectively, according to the third and fourth embodiments of the present invention. Note that the same portions J3 and members as in the first embodiment are denoted by the same reference numerals.
第３実施例の光源装置３１は反射鏡１３で平″行光束に
された照明用ランプ１２の光が絞り１５により絞られ、
この絞られた光が結像レンズ１６により、ライトガイド
１０の入射端面に設けられた拡散板１７に直接結像され
るようになっている。In the light source device 31 of the third embodiment, the light from the illumination lamp 12 that has been made into a parallel beam by the reflecting mirror 13 is condensed by the diaphragm 15.
This narrowed light is directly imaged by an imaging lens 16 onto a diffuser plate 17 provided on the incident end surface of the light guide 10.
このような構成では第一実施例と同様に作用する。この
実施例ではコンデンサレンズを省略することができる。Such a configuration functions similarly to the first embodiment. In this embodiment, the condenser lens can be omitted.
第４実施例の光源装置４１はライトガイド１０の入Ｄｆ
端面が粗面状に形成された拡散部４２により光が拡散さ
れるようになっており、他の構成は第３実施例と同様で
ある。The light source device 41 of the fourth embodiment has an input Df of the light guide 10.
Light is diffused by a diffusion portion 42 having a rough end surface, and the other configurations are the same as in the third embodiment.
このような構成では第３実施例と同様に作用する。Such a configuration functions similarly to the third embodiment.
この実施例では第３実施例と同様に部品点数を省略する
ことができる。In this embodiment, the number of parts can be omitted similarly to the third embodiment.
尚、上記実施例において、拡散板１７および拡散部４２
は光源からライトガイド１０の入射端までの光路途上に
設【プられていればよく、又、光を拡散できるものであ
ればよい。又、絞り１５も同様に自動又は手動で光Ｄ制
御できる任意の手段を用いることができる。In addition, in the above embodiment, the diffuser plate 17 and the diffuser 42
It suffices if it is provided in the middle of the optical path from the light source to the incident end of the light guide 10, and it suffices if it is capable of diffusing light. Furthermore, for the diaphragm 15, any means capable of automatically or manually controlling the light D can be used.
尚、上記実施例は白色光源でカラー撮像するための光源
装置に用いであるが、本発明の絞り装置は色面順次方式
の照明手段を形成する光源装置にも適用できる。Although the above embodiment is used for a light source device for color imaging using a white light source, the diaphragm device of the present invention can also be applied to a light source device forming a color plane sequential type illumination means.
［発明の効果］
以上の述べたように本発明によれば、光源の光をライト
ガイドの入ＯＡ端に照射するまでの光路途上に、通過光
εを可変する絞りを設けるとともに、光の拡散手段を設
けているため、照明強度を可変した場合でも配光特性及
び分光特性を変えることなく照明光量を調整することが
できる効果がある。[Effects of the Invention] As described above, according to the present invention, a diaphragm that changes the passing light ε is provided on the optical path from the light source to the entrance OA end of the light guide, and the light is diffused. Since the means is provided, even when the illumination intensity is varied, the amount of illumination light can be adjusted without changing the light distribution characteristics and spectral characteristics.
第１図および第２図は本発明の第１実施例に係り、第１
図は第１実施例を協えた内視鏡を示し、第２図は第１図
の絞り装置部分を示す図、第３図は本発明の第２実施例
に係り、絞り装置部分を示す図、第４図および第５図は
本発明の第３および置を示す図、第７図は第６図の絞り
部分、の図である。
１・・・内視鏡 ２・・・挿入部４・・・固
体撮像装置 １０・・・ライトガイド１１．２１，３
１．４１・・・光源装置１２・・・照明用ランプ １
３・・・反射鏡１４・・・コンデンサレンズ
１５・・・絞り １６・・・結像レンズ１７
・・・拡散板 ４２・・・拡散部代理人 弁
理士 伊 藤 進
第２図 ／１１
第３図 、ぞ１
第４図 ％ｌ
第６図
第７図
巨１頁の続き
■Ｉｎｔ、ＣＪ４ 識別記号 庁内整理
番号Ｇ Ｏ２Ｂ ２７１００
７５２９−２Ｈ）発 明 者 中 村 −夫
東京都渋谷区幡ケ谷２株式会社内
）発 明 者 菅 原 −健 東京都渋谷区幡
ケ谷２株式会社内
）発 明 者 苫米地 英夫 東京都渋谷区幡ケ谷２
株式会社内FIG. 1 and FIG. 2 relate to a first embodiment of the present invention.
The figure shows an endoscope that incorporates the first embodiment, FIG. 2 is a diagram showing the diaphragm device portion of FIG. 1, and FIG. 3 is a diagram showing the diaphragm device portion according to the second embodiment of the present invention. , FIG. 4 and FIG. 5 are views showing the third and third positions of the present invention, and FIG. 7 is a view of the aperture portion of FIG. 6. 1... Endoscope 2... Insertion section 4... Solid-state imaging device 10... Light guide 11.21, 3
1.41...Light source device 12...Illumination lamp 1
3...Reflector 14...Condenser lens 15...Aperture 16...Imaging lens 17
... Diffusion board 42 ... Diffusion Department agent Patent attorney Susumu Ito Figure 2 / 11 Figure 3 , 1 Figure 4 %l Figure 6 Figure 7 Continuation of large 1 page ■ Int, CJ4 Identification Symbol Office reference number G O2B 27100
7529-2H) Inventor: Husband Nakamura
2 Hatagaya Co., Ltd., Shibuya-ku, Tokyo) Inventor Ken Sugawara 2 Hatagaya Co., Ltd., Shibuya-ku, Tokyo) Inventor Hideo Tomabechi 2 Hatagaya, Shibuya-ku, Tokyo
Inside the corporation
Claims (1)
ら被写体に向けて照明光が出射され、このライトガイド
の手元側後端が装着される内視鏡用光源装置における光
源の照明用光束を絞つてライトガイドの後端に照射する
ことによつて、被写体に照射される照明強度を適量に調
整可能とする内視鏡用光源装置の絞り装置において、前
記光源の光をライドガイドの後端に照射するまでの光路
途上に、通過光量を可変する絞りと、該光を拡散させる
拡散手段とを設けたことを特徴とする内視鏡用光源装置
の絞り装置。Illumination light is emitted toward the subject from the distal end of the light guide inserted into the insertion section of the endoscope, and the illumination luminous flux of the light source in the light source device for an endoscope is attached to the proximal rear end of the light guide. In an aperture device of an endoscope light source device, the light from the light source is directed to the rear end of the light guide, thereby making it possible to adjust the illumination intensity irradiated to the subject to an appropriate amount by focusing the light from the light source onto the rear end of the light guide. A diaphragm device for a light source device for an endoscope, characterized in that a diaphragm for varying the amount of passing light and a diffusion means for diffusing the light are provided on the optical path up to the end of the light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60018194A JPS61177417A (en) | 1985-02-01 | 1985-02-01 | Aperture device of light source device for endoscope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60018194A JPS61177417A (en) | 1985-02-01 | 1985-02-01 | Aperture device of light source device for endoscope |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61177417A true JPS61177417A (en) | 1986-08-09 |
Family
ID=11964817
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60018194A Pending JPS61177417A (en) | 1985-02-01 | 1985-02-01 | Aperture device of light source device for endoscope |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61177417A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5656983A (en) * | 1992-11-11 | 1997-08-12 | Kabushiki Kaisha Toyoda Jidoshokki Seisakusho | Inductive coupler for transferring electrical power |
| JP2011120627A (en) * | 2009-12-08 | 2011-06-23 | Fujifilm Corp | Illumination optical system of endoscope |
| CN105223681A (en) * | 2015-11-11 | 2016-01-06 | 沈阳理工大学 | A kind of medical electronic endoscope condenser system |
-
1985
- 1985-02-01 JP JP60018194A patent/JPS61177417A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5656983A (en) * | 1992-11-11 | 1997-08-12 | Kabushiki Kaisha Toyoda Jidoshokki Seisakusho | Inductive coupler for transferring electrical power |
| JP2011120627A (en) * | 2009-12-08 | 2011-06-23 | Fujifilm Corp | Illumination optical system of endoscope |
| CN105223681A (en) * | 2015-11-11 | 2016-01-06 | 沈阳理工大学 | A kind of medical electronic endoscope condenser system |
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