JP3068702B2 - Light source device for endoscope - Google Patents
Light source device for endoscopeInfo
- Publication number
- JP3068702B2 JP3068702B2 JP4033010A JP3301092A JP3068702B2 JP 3068702 B2 JP3068702 B2 JP 3068702B2 JP 4033010 A JP4033010 A JP 4033010A JP 3301092 A JP3301092 A JP 3301092A JP 3068702 B2 JP3068702 B2 JP 3068702B2
- Authority
- JP
- Japan
- Prior art keywords
- light source
- light
- endoscope
- cut filter
- source lamp
- 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 - Fee Related
Links
- 238000005286 illumination Methods 0.000 claims description 27
- 239000000835 fiber Substances 0.000 claims description 12
- 238000010586 diagram Methods 0.000 description 6
- 239000004904 UV filter Substances 0.000 description 5
- 238000002834 transmittance Methods 0.000 description 4
- 239000003086 colorant Substances 0.000 description 3
- 238000003384 imaging method Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 229910052724 xenon Inorganic materials 0.000 description 2
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000003902 lesion Effects 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
Landscapes
- Instruments For Viewing The Inside Of Hollow Bodies (AREA)
- Endoscopes (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明は、内視鏡の照明用ライ
トガイドファイババンドルの入射端に照明光を入射させ
るための内視鏡用光源装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light source device for an endoscope for making illumination light incident on an incident end of a light guide fiber bundle for illumination of an endoscope.
【０００２】[0002]
【従来の技術】内視鏡による観察像は、病変等の発見及
び正しい診断を行うために、できるだけ正しい色を再現
することが求められる。2. Description of the Related Art An image observed by an endoscope is required to reproduce a correct color as much as possible in order to detect a lesion or the like and make a correct diagnosis.
【０００３】しかし、照明用ライトガイドファイババン
ドルの光透過率が光の波長によって異なっている等、幾
つかの要因があって、観察画像は必ずしも正しい色を再
現しない。However, the observed image does not always reproduce a correct color due to several factors, such as the fact that the light transmittance of the illumination light guide fiber bundle differs depending on the wavelength of light.
【０００４】そこで、正しい色再現性を得るために、光
源ランプから放射された赤外域と近赤外域の光をカット
する赤外カットフィルタを、照明用ライトガイドファイ
ババンドルの入射端と光源ランプとの間に配置して、照
明光の色補正を行っている。Therefore, in order to obtain correct color reproducibility, an infrared cut filter for cutting off infrared and near-infrared light emitted from the light source lamp is provided with an incident end of the illumination light guide fiber bundle and the light source lamp. And performs color correction of the illumination light.
【０００５】[0005]
【発明が解決しようとする課題】しかし、照明用ライト
ガイドファイババンドルの入射端と光源ランプとの間に
赤外カットフィルタを配置すると、光源ランプからの照
明光の直射によって、赤外カットフィルタが割れたり、
フィルタにコーティングされた蒸着膜が剥離する等、赤
外カットフィルタの破損が発生していた。However, when an infrared cut filter is arranged between the incident end of the light guide fiber bundle for illumination and the light source lamp, the infrared cut filter is directly irradiated by the illumination light from the light source lamp. Cracks,
The infrared cut filter was damaged, for example, the deposited film coated on the filter was peeled off.
【０００６】そこで、赤外カットフィルタと光源ランプ
との間にさらに赤外領域の光を相当程度吸収する熱線吸
収フィルタを配置して、赤外カットフィルタへの熱線の
到達を少なくしたものもあった。In view of the above, there is a filter in which a heat ray absorbing filter for absorbing light in the infrared region to a considerable extent is arranged between the infrared cut filter and the light source lamp to reduce the amount of heat rays reaching the infrared cut filter. Was.
【０００７】しかし、熱線吸収フィルタを入れると、可
視領域の光もある程度そこで吸収されて、照明光量が１
ないし２割程度減衰してしまい、しかも赤外カットフィ
ルタの破損は無くならなかった。However, when a heat ray absorption filter is inserted, light in the visible region is absorbed to some extent there, and the amount of illumination is reduced to one.
The attenuation was about 20%, and the infrared cut filter was not damaged.
【０００８】そこで本発明は、照明光量の減衰がなく、
赤外カットフィルタの破損を完全に防止することができ
る内視鏡用光源装置を提供することを目的とする。Accordingly, the present invention provides an optical system which does not attenuate the amount of illumination light.
An object of the present invention is to provide a light source device for an endoscope that can completely prevent damage to an infrared cut filter.
【０００９】[0009]
【課題を解決するための手段】上記の目的を達成するた
め、本発明の内視鏡用光源装置は、内視鏡の照明用ライ
トガイドファイババンドルの入射端と光源ランプとの間
に、上記光源ランプから放射される照明光に含まれる近
赤外領域の光をカットする赤外カットフィルタを設けた
内視鏡用光源装置において、上記光源ランプから放射さ
れる紫外領域の光をカットする紫外線カットフィルタ
を、上記光源ランプと上記赤外カットフィルタとの間に
配置したことを特徴とする。In order to achieve the above object, a light source device for an endoscope according to the present invention comprises a light source lamp between an incident end of a light guide fiber bundle for illumination of an endoscope and a light source lamp. In an endoscope light source device provided with an infrared cut filter that cuts light in a near infrared region included in illumination light emitted from a light source lamp, an ultraviolet ray that cuts light in an ultraviolet region emitted from the light source lamp A cut filter is disposed between the light source lamp and the infrared cut filter.
【００１０】[0010]
【実施例】図面を参照して実施例を説明する。図１にお
いて、１は、挿入部２の先端に固体撮像素子３を配置し
たいわゆる電子内視鏡であり、その観察範囲は照明用ラ
イトガイドファイババンドル５中を伝達される照明光に
よって照明される。An embodiment will be described with reference to the drawings. In FIG. 1, reference numeral 1 denotes a so-called electronic endoscope in which a solid-state imaging device 3 is disposed at the tip of an insertion section 2, and its observation range is illuminated by illumination light transmitted through a light guide fiber bundle 5 for illumination. .
【００１１】固体撮像素子３から出力される画像信号
は、ビデオプロセッサ６に入力し、そこで、モニタ７に
フルカラー画像を再生させるための処理が行われる。照
明用ライトガイドファイババンドル５の入射端５ａは、
コネクタ８によって光源装置１０に着脱自在に接続され
ている。An image signal output from the solid-state imaging device 3 is input to a video processor 6, where a process for reproducing a full-color image on a monitor 7 is performed. The incident end 5a of the light guide fiber bundle 5 for illumination is
The light source device 10 is detachably connected to the light source device 10 by a connector 8.
【００１２】光源装置１０内に設けられたキセノンラン
プからなる光源ランプ１１と照明用ライトガイドファイ
ババンドル５の入射端５ａとの間には、光源ランプ１１
から放射された照明光を照明用ライトガイドファイババ
ンドル５の入射端５ａに集光させるためのコンデンサレ
ンズ１２が配置されている。A light source lamp 11 composed of a xenon lamp provided in a light source device 10 and an incident end 5a of a light guide fiber bundle 5 for illumination are provided between the light source lamp 11 and the light source lamp 11.
A condenser lens 12 for converging the illumination light emitted from the lens to the incident end 5a of the illumination light guide fiber bundle 5 is arranged.
【００１３】また、コンデンサレンズ１２と光源ランプ
１１との間には、赤（Ｒ）、緑（Ｇ）及び青（Ｂ）の３
色のカラーフィルタを取り付けて一定速度で回転駆動さ
れる回転三色フィルタ１３が配置されている。ビデオプ
ロセッサ６の処理は、この回転三色フィルタ１３の回転
と連動しており、三原色による時分割の照明によって画
順次式の撮像が行われる。Further, between the condenser lens 12 and the light source lamp 11, three colors of red (R), green (G) and blue (B) are provided.
A rotating three-color filter 13 having a color filter mounted thereon and driven to rotate at a constant speed is provided. The processing of the video processor 6 is interlocked with the rotation of the rotating three-color filter 13, and image-sequential imaging is performed by time-division illumination with three primary colors.
【００１４】そして、この回転三色フィルタ１３と光源
ランプ１１との間には、光源ランプ１１から放射される
照明光中に含まれる赤外域と近赤外域の光をカットする
赤外カットフィルタ１４が配置されている。これによっ
て、モニタ７に表示される観察画像の色再現性を向上さ
せている。Between the rotary three-color filter 13 and the light source lamp 11, there is provided an infrared cut filter 14 for cutting infrared and near-infrared light contained in illumination light emitted from the light source lamp 11. Is arranged. Thereby, the color reproducibility of the observation image displayed on the monitor 7 is improved.
【００１５】さらに、この赤外カットフィルタ１４と光
源ランプ１１との間には、紫外域の光をカットする紫外
線カットフィルタ（いわゆるＵＶフィルタ）１５が配置
されている。Further, between the infrared cut filter 14 and the light source lamp 11, an ultraviolet cut filter (so-called UV filter) 15 for cutting light in an ultraviolet region is arranged.
【００１６】次に、図２ないし図６をも参照して上記実
施例の動作について説明する。図２は光源ランプ１１で
あるキセノンランプの放射率特性を示しており、可視域
の光（波長３８０〜７８０ｎｍ）だけでなく、赤外線及
び紫外線も相当程度含まれている。Next, the operation of the above embodiment will be described with reference to FIGS. FIG. 2 shows the emissivity characteristics of the xenon lamp as the light source lamp 11, which contains not only visible light (wavelength 380 to 780 nm) but also infrared rays and ultraviolet rays to a considerable extent.
【００１７】従来、赤外カットフィルタ１４が破損する
のは、照明光に含まれる熱線である赤外線によるものと
考えられていた。しかし、発明者等が行った実験の結
果、赤外カットフィルタ１４に数十層（５０〜７０層）
にわたってコーティングされた蒸着膜は、図３に示され
るように、紫外域に光の吸収があり、照明光に含まれる
紫外線エネルギーを吸収することによって発熱して、そ
の結果赤外カットフィルタ１４が破損することがわかっ
た。Conventionally, it has been considered that the infrared cut filter 14 is damaged by infrared rays which are heat rays contained in the illumination light. However, as a result of an experiment performed by the inventors, several tens of layers (50 to 70 layers) were added to the infrared cut filter 14.
As shown in FIG. 3, the vapor-deposited film has a light absorption in the ultraviolet region, and generates heat by absorbing ultraviolet energy included in the illumination light, and as a result, the infrared cut filter 14 is damaged. I found out.
【００１８】図４は、ＵＶフィルタ１５の透過特性を示
しており、紫外域の光だけが完全に吸収されて、次の赤
外カットフィルタ１４には達しない。なお、ＵＶフィル
タ１５は分光特性が簡単で蒸着膜の層数が少ないので、
照明光によって破損することはない。FIG. 4 shows the transmission characteristics of the UV filter 15. Only the light in the ultraviolet region is completely absorbed and does not reach the next infrared cut filter 14. Since the UV filter 15 has a simple spectral characteristic and a small number of deposited films,
It is not damaged by illumination light.
【００１９】ＵＶフィルタ１５を透過した光は、赤外カ
ットフィルタ１４によって、図５に示されるように赤外
域と近赤外域の光がカットされて残りの波長の可視光が
透過する。The light transmitted through the UV filter 15 is cut by the infrared cut filter 14 into infrared and near-infrared light as shown in FIG. 5, and visible light of the remaining wavelength is transmitted.
【００２０】そして、回転三色フィルタ１３に達した光
は、図６に示されるように、三色のフィルタによって
赤、緑及び青の三色の照明光に時分割されて照明用ライ
トガイドファイババンドル５の入射端５ａに入射する。The light that has reached the rotating three-color filter 13 is time-divided by the three-color filters into three colors of red, green, and blue illumination light as shown in FIG. The light enters the incident end 5 a of the bundle 5.
【００２１】なお、本発明は上記実施例に限定されるも
のではなく、例えば、イメージガイドファイバによって
観察像の伝達を行う光学式内視鏡のための光源装置等に
適用してもよい。The present invention is not limited to the above embodiment, but may be applied to, for example, a light source device for an optical endoscope which transmits an observation image by an image guide fiber.
【００２２】[0022]
【発明の効果】本発明の内視鏡用光源装置によれば、光
源ランプから放射された照明光のうち、紫外域の光が紫
外線カットフィルタでカットされて赤外カットフィルタ
には達しないので、赤外カットフィルタの破損を完全に
防ぐことができる。According to the light source device for an endoscope of the present invention, of the illumination light emitted from the light source lamp, light in the ultraviolet region is cut by the ultraviolet cut filter and does not reach the infrared cut filter. In addition, the breakage of the infrared cut filter can be completely prevented.
【００２３】そして、紫外線カットフィルタはコーティ
ング層数が少ないので安価であり、しかも透過する可視
領域の照明光量の減衰が極めて少ない等の優れた効果を
有する。The ultraviolet cut filter is inexpensive because it has a small number of coating layers, and has excellent effects such as very little attenuation of the amount of illuminating light in the visible region that passes therethrough.
【図１】実施例の構成図である。FIG. 1 is a configuration diagram of an embodiment.
【図２】実施例の光源ランプの放射特性線図である。FIG. 2 is a radiation characteristic diagram of the light source lamp of the embodiment.
【図３】実施例の赤外カットフィルタの蒸着膜の吸収係
数特性線図である。FIG. 3 is an absorption coefficient characteristic diagram of a deposited film of an infrared cut filter of an example.
【図４】実施例のＵＶフィルタの透過率特性線図であ
る。FIG. 4 is a transmittance characteristic diagram of the UV filter of the embodiment.
【図５】実施例の赤外カットフィルタの透過率特性線図
である。FIG. 5 is a transmittance characteristic diagram of the infrared cut filter of the example.
【図６】実施例の回転三色フィルタの透過率特性線図で
ある。FIG. 6 is a transmittance characteristic diagram of the rotating three-color filter of the example.
５ 照明用ライトガイドファイババンドル ５ａ 入射端 １１ 光源ランプ １４ 赤外カットフィルタ １５ 紫外線カットフィルタ 5 Light Guide Fiber Bundle for Illumination 5a Incident End 11 Light Source Lamp 14 Infrared Cut Filter 15 Ultraviolet Cut Filter
Claims (1)
ドルの入射端と光源ランプとの間に、上記光源ランプか
ら放射される照明光に含まれる近赤外領域の光をカット
する赤外カットフィルタを設けた内視鏡用光源装置にお
いて、 上記光源ランプから放射される紫外領域の光をカットす
る紫外線カットフィルタを、上記光源ランプと上記赤外
カットフィルタとの間に配置したことを特徴とする内視
鏡用光源装置。An infrared cut between an incident end of a light guide fiber bundle for illumination of an endoscope and a light source lamp for cutting light in a near infrared region included in illumination light emitted from the light source lamp. An endoscope light source device provided with a filter, wherein an ultraviolet cut filter that cuts light in an ultraviolet region emitted from the light source lamp is disposed between the light source lamp and the infrared cut filter. Endoscope light source device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4033010A JP3068702B2 (en) | 1992-02-20 | 1992-02-20 | Light source device for endoscope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4033010A JP3068702B2 (en) | 1992-02-20 | 1992-02-20 | Light source device for endoscope |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05232387A JPH05232387A (en) | 1993-09-10 |
| JP3068702B2 true JP3068702B2 (en) | 2000-07-24 |
Family
ID=12374858
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4033010A Expired - Fee Related JP3068702B2 (en) | 1992-02-20 | 1992-02-20 | Light source device for endoscope |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3068702B2 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IL115291A0 (en) * | 1994-09-15 | 1995-12-31 | Gabriel Med Inc | Method and apparatus for transillumination of body members |
| US5658070A (en) * | 1994-10-27 | 1997-08-19 | Alcon Laboratories, Inc. | Method of varying luminous intensity of light in an illumination system |
| FR2861185B1 (en) * | 2003-10-16 | 2005-12-30 | Snecma Moteurs | ENDOSCOPE WITH ULTRAVIOLET LIGHTING |
| JP2007301274A (en) * | 2006-05-15 | 2007-11-22 | Pentax Corp | Endoscope device with infrared cut filter |
| US7444057B2 (en) | 2007-03-16 | 2008-10-28 | Alcon, Inc. | Variable-wedge rotating-disk beam attenuator for ophthalmic endoilluminator |
| US7499624B2 (en) | 2007-03-16 | 2009-03-03 | Alcon, Inc. | Ophthalmic Endoilluminator with Variable-Wedge Rotating-Disk Beam Attenuator |
| KR20120097828A (en) | 2011-02-25 | 2012-09-05 | 삼성전자주식회사 | Endoscope apparatus capable of providing narrow band imaging and image processing method of the endoscope |
-
1992
- 1992-02-20 JP JP4033010A patent/JP3068702B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05232387A (en) | 1993-09-10 |
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