JPH0658457B2 - Endoscope device - Google Patents
Endoscope deviceInfo
- Publication number
- JPH0658457B2 JPH0658457B2 JP59074296A JP7429684A JPH0658457B2 JP H0658457 B2 JPH0658457 B2 JP H0658457B2 JP 59074296 A JP59074296 A JP 59074296A JP 7429684 A JP7429684 A JP 7429684A JP H0658457 B2 JPH0658457 B2 JP H0658457B2
- Authority
- JP
- Japan
- Prior art keywords
- color
- endoscope
- characteristic
- image pickup
- light
- 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 - Lifetime
Links
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
- A61B1/04—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 combined with photographic or television appliances
- A61B1/05—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 combined with photographic or television appliances characterised by the image sensor, e.g. camera, being in the distal end portion
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Surgery (AREA)
- Biomedical Technology (AREA)
- Medical Informatics (AREA)
- Optics & Photonics (AREA)
- Pathology (AREA)
- Radiology & Medical Imaging (AREA)
- Biophysics (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Heart & Thoracic Surgery (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Instruments For Viewing The Inside Of Hollow Bodies (AREA)
- Endoscopes (AREA)
- Color Television Image Signal Generators (AREA)
Description
【発明の詳細な説明】 技術分野 この発明は、挿入部先端内に光源を有する内視鏡装置に
関する。Description: TECHNICAL FIELD The present invention relates to an endoscope apparatus having a light source inside a distal end of an insertion portion.
従来技術 一般に、内視鏡装置には、先端光源式内視鏡と外部光源
式内視鏡がある。後者は、外部光源からライトガイドを
介して体腔内に照明光を伝達するので、ライトガイドに
よる光量の減衰がある。そのため、大光量光源が必要と
なり、内視鏡装置の大型化を招いていた。一方、前者に
おいては、ライトガイドによる光量の減衰はないが、光
源の大きさが挿入部先端の直径を決めるので、やはり小
型の光源が望まれている。ところが、従来は、先端光源
としては、白色光源が用いられていたので、挿入部の直
径を小さくすることができなかった。このことは、直視
型内視鏡において、問題であった。小型の光源として
は、発光ダイオード（ＬＥＤ）、レーザダイオード（Ｌ
Ｄ）があるが、これらの発光特性は単色特性であるの
で、被写体が光源の色に着色されて撮像され、正確な被
写体の色がわからなかった。2. Description of the Related Art In general, endoscope devices include a tip light source type endoscope and an external light source type endoscope. The latter transmits the illumination light from the external light source into the body cavity through the light guide, so that the light guide attenuates the amount of light. Therefore, a light source with a large amount of light is required, which causes an increase in the size of the endoscope device. On the other hand, in the former case, the light amount is not attenuated by the light guide, but since the size of the light source determines the diameter of the tip of the insertion portion, a small light source is also desired. However, conventionally, a white light source has been used as the tip light source, so that the diameter of the insertion portion cannot be reduced. This has been a problem in direct-viewing endoscopes. Light sources such as light emitting diodes (LEDs) and laser diodes (L
Although there is D), since these light emitting characteristics are monochromatic characteristics, the subject was colored with the color of the light source to be imaged, and the exact color of the subject was not known.
目的 この発明の目的は、挿入部先端を細くでき、かつ、均一
な色再現性を得ることができる内視鏡装置を提供するこ
とである。OBJECT The object of the present invention is to provide an endoscope apparatus that can make the tip of the insertion section thin and obtain uniform color reproducibility.
概要 この目的は、内視鏡本体と、前記内視鏡本体の挿入部先
端内に設けられ異なる発光特性を有する小型の第一、第
二の発光部と、前記内視鏡本体の挿入部先端に取り付け
られ体腔内を撮像し撮像信号を出力する撮像部と、前記
撮像部の出力する撮像信号を赤、青、緑の三原色成分信
号に分解する色分解回路と、前記色分解回路の出力する
各成分信号を前記第一、第二の発光部の発光特性に応じ
て増幅する増幅器を具備する内視鏡装置により実現され
る。The purpose of the present invention is to provide an endoscope main body, small first and second light emitting portions provided in the distal end of the insertion portion of the endoscope main body and having different emission characteristics, and the distal end of the insertion portion of the endoscope main body Attached to the imaging unit for imaging the inside of the body cavity and outputting an imaging signal; a color separation circuit for decomposing the imaging signal output by the imaging unit into three primary color component signals of red, blue, and green; and outputting by the color separation circuit. This is realized by an endoscope apparatus including an amplifier that amplifies each component signal according to the light emission characteristics of the first and second light emitting units.
実施例 以下、図面を参照して、この発明による内視鏡装置の一
実施例を説明する。第一図は、この一実施例の概略を示
すブロック図である。この一実施例は、先端光源式の内
視鏡本体１０と、内視鏡本体１０の操作端（後端）に接
続されたカメラコントロール部１２とからなる。内視鏡
本体１０の先端には、赤色ＬＥＤ１４と、青色ＬＥＤ１
６が設けられている。これらＬＥＤ１４、１６は、それ
ぞれ、第二図に示すような発光特性を有している。その
ため、これらＬＥＤ１４、１６から発せられた照明光の
色成分は、破線で示すように、緑成分が非常に少ない
が、一応、赤、緑、青の三原色成分を含んでいる。Embodiment An embodiment of the endoscope apparatus according to the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the outline of this embodiment. This embodiment includes an endoscope main body 10 of a tip light source type and a camera control unit 12 connected to an operation end (rear end) of the endoscope main body 10. At the tip of the endoscope body 10, a red LED 14 and a blue LED 1
6 is provided. Each of these LEDs 14 and 16 has a light emission characteristic as shown in FIG. Therefore, the color components of the illumination light emitted from these LEDs 14 and 16 have a very small green component as shown by the broken line, but for the time being, include the three primary color components of red, green, and blue.
内視鏡本体１０の先端には、ＬＥＤ１４、１６により照
明された体腔内の像を、撮像レンズ１８を介して撮像す
る固体撮像素子（ＣＣＤ）２０が設けられている。ＣＣ
Ｄ２０の撮像面には、各画素毎に赤、緑、青の三原色の
フィルタ素が配されたモザイクフィルタ２２が設けられ
ている。そのため、ＣＣＤ２０からは赤、緑、青の色成
分撮像信号が、各画素毎に、順次出力される。ＣＣＤ２
０の出力信号が、内視鏡本体１０内を介して、カメラコ
ントロール部１２内の色分離回路２４に供給される。カ
メラコントロール部１２内には、ＬＥＤ１４、１６のた
めの電源ＶＤＤも、設けられている。色分離回路２４
は、ＣＣＤ２０の出力信号を画素毎に各色成分信号に分
離する。赤、緑、青の色成分信号は、それぞれ増幅器２
６−１、２６−２、２６−３を介して、カラーエンコー
ダ２８に供給されるとともに、ホワイトバランス調整用
のスイッチ３０の閉成により動作する増幅率制御回路３
２にも供給される。増幅器２６−１、２６−２、２６−
３の増幅率は増幅率制御回路３２により決定される。カ
ラーエンコーダ２８の出力信号が内視鏡映像信号として
ＣＲＴモニタ３４、あるいは記録系に供給される。At the tip of the endoscope body 10, a solid-state image sensor (CCD) 20 that captures an image of a body cavity illuminated by the LEDs 14 and 16 via an imaging lens 18 is provided. CC
The image pickup surface of D20 is provided with a mosaic filter 22 in which filter elements of three primary colors of red, green, and blue are arranged for each pixel. Therefore, the CCD 20, the red, green, and blue color component imaging signals are sequentially output for each pixel. CCD2
The output signal of 0 is supplied to the color separation circuit 24 in the camera control unit 12 via the endoscope body 10. A power supply VDD for the LEDs 14 and 16 is also provided in the camera control unit 12. Color separation circuit 24
Separates the output signal of the CCD 20 into each color component signal for each pixel. The red, green and blue color component signals are respectively fed to the amplifier 2
The amplification factor control circuit 3 is supplied to the color encoder 28 via 6-1, 26-2, and 26-3 and operates by closing the switch 30 for white balance adjustment.
2 is also supplied. Amplifiers 26-1, 26-2, 26-
The amplification factor of 3 is determined by the amplification factor control circuit 32. The output signal of the color encoder 28 is supplied to the CRT monitor 34 or a recording system as an endoscope video signal.
この一実施例においては、ＣＣＤ２０は第二図に示すよ
うな色特性の照明光の下で撮影を行なうので、その撮像
信号の色特性も赤と青の成分が強くなっている。そのた
め、そのまま再生すると、緑の成分が弱いまま再生され
てしまう。この実施例では、これを防ぐために、撮像信
号を色成分毎に増幅して、撮像信号の色特性が均一にな
るようにしている。撮影者はＣＲＴモニタ３４を見て、
再生画像の色特性が均一でないときは、スイッチ３０を
閉成する。増幅率制御回路３２は、増幅器２６−１、２
６−２、２６−３の出力信号の大きさが等しくなるよう
に各増幅器の増幅率を変化し、一致がえられると増幅率
を固定する。これにより、カラーエンコーダ２８からは
色特性が均一な撮像信号が出力される。この実施例によ
れば内視鏡の挿入部先端には大型の白色光源の代わりに
小型のＬＥＤが設けられているので挿入部の直径を細く
することができる。In this embodiment, the CCD 20 shoots under illumination light having the color characteristics shown in FIG. 2, so that the color characteristics of the image pickup signal have strong red and blue components. Therefore, if the reproduction is performed as it is, the reproduction is performed with the green component being weak. In this embodiment, in order to prevent this, the image pickup signal is amplified for each color component so that the color characteristics of the image pickup signal become uniform. The photographer looks at the CRT monitor 34,
When the color characteristics of the reproduced image are not uniform, the switch 30 is closed. The amplification factor control circuit 32 includes amplifiers 26-1 and 2-2.
The amplification factors of the respective amplifiers are changed so that the magnitudes of the output signals of 6-2 and 26-3 are equal, and when the coincidence is obtained, the amplification factors are fixed. As a result, the color encoder 28 outputs an image pickup signal having uniform color characteristics. According to this embodiment, a small LED is provided at the distal end of the insertion portion of the endoscope instead of a large white light source, so that the diameter of the insertion portion can be reduced.
上の説明では、各増幅器の出力を検出して各増幅器の増
幅率をきめたが、ＬＥＤの発光特性が、あらかじめ識っ
ているときには、それに応じて、増幅率を制御してもよ
い。例えば、内視鏡の操作端（後端）にカメラコントロ
ール部が内蔵されている場合には、各増幅率は固定され
ていてもよい。あるいは内視鏡本体とカメラコントロー
ル部との接続の際に、内視鏡本体からＬＥＤの発光特性
を表す信号を増幅器に供給して、これにおって増幅率を
決定してもよい。発光部としては、ＬＥＤの代りにＬＤ
（レーザダイオード）を用いてもよい。また、赤と青の
二色の代りに、発光特性が一部重複していれば、三原色
のなかの任意の二色を用いてもよい。In the above description, the output of each amplifier is detected and the amplification factor of each amplifier is determined. However, when the emission characteristics of the LED are known in advance, the amplification factor may be controlled accordingly. For example, when the camera control unit is built in the operation end (rear end) of the endoscope, each amplification factor may be fixed. Alternatively, when the endoscope main body and the camera control unit are connected, a signal representing the light emission characteristic of the LED may be supplied from the endoscope main body to the amplifier, and the amplification factor may be determined by this. As a light emitting part, LD is used instead of LED
(Laser diode) may be used. Further, instead of the two colors of red and blue, any two colors of the three primary colors may be used as long as the emission characteristics partially overlap.
発明の効果 以上説明したように、この発明によれば、先端光源式の
内視鏡装置において、先端部を小型化できるとともに、
色再現性を均一にできる。EFFECTS OF THE INVENTION As described above, according to the present invention, in the endoscope apparatus of the tip light source type, the tip portion can be downsized, and
Color reproduction can be made uniform.
第一図はこの発明による内視鏡装置の一実施例の構成を
示す概略図、第二図は第一図中のＬＥＤの発光特性を示
す図である。 １０……内視鏡本体 １２……カメラコントロール部 １４、１６……ＬＥＤ １８……固体撮像素子、 ２４……色分離回路 ２６−１、２６−２、２６−３……増幅器 ２８……カラーエンコーダ ３２……増幅率制御回路 ３４……ＣＲＴモニタFIG. 1 is a schematic diagram showing the configuration of an embodiment of the endoscope apparatus according to the present invention, and FIG. 2 is a diagram showing the light emission characteristics of the LEDs in FIG. 10 ... Endoscope body 12 ... Camera control section 14, 16 ... LED 18 ... Solid-state image sensor, 24 ... Color separation circuit 26-1, 26-2, 26-3 ... Amplifier 28 ... Color Encoder 32 …… Amplification factor control circuit 34 …… CRT monitor
───────────────────────────────────────────────────── フロントページの続き (72)発明者 廣澤 勲 東京都渋谷区幡ヶ谷２丁目43番２号 オリ ンパス光学工業株式会社内 (72)発明者 日比野 浩樹 東京都渋谷区幡ヶ谷２丁目43番２号 オリ ンパス光学工業株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Isao Hirosawa 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Optical Co., Ltd. (72) Inventor Hiroki Hibino 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Optical Co., Ltd.
Claims (2)
第１の色成分を中心とする第１の発光特性を有する第１
の発光部と、 前記内視鏡本体の挿入部先端内に設けられ三原色の中の
第２の色成分を中心とし第３の色成分において前記第１
の発光特性と重複する第２の発光特性を有する第２の発
光部と、 前記内視鏡本体の挿入部先端内に設けられカラーモザイ
クフィルタを用いて体腔内を撮像し撮像信号を出力する
撮像手段と、 前記撮像手段の出力する撮像信号を三原色信号に変換す
る色分解手段と、 前記色分解手段の出力する各成分信号を増幅する手段
と、 前記増幅手段の増幅率を前記第１、第２の発光特性の和
特性の逆特性に比例して決定する手段とを具備する内視
鏡装置。1. An endoscope main body, and a first light-emission characteristic centered on a first color component of the three primary colors provided in a tip of an insertion portion of the endoscope main body.
And a second color component of the three primary colors provided in the distal end of the insertion part of the endoscope main body, with the first color component being the first color component in the third color component.
A second light emitting portion having a second light emitting characteristic that overlaps with the light emitting characteristic of 1., and an image pickup apparatus for picking up an image of the inside of a body cavity using a color mosaic filter provided in the tip of the insertion portion of the endoscope body and outputting an image pickup signal Means, color separation means for converting the image pickup signal output by the image pickup means into three primary color signals, means for amplifying each component signal output by the color separation means, and amplification factors of the amplification means for the first and the first And a means for determining in proportion to the inverse characteristic of the sum characteristic of the emission characteristics of No. 2.
第２の発光特性は青を中心とし、前記第１、第２の発光
特性は緑で重複し、前記増幅手段の増幅率は緑成分が大
きく、赤、青成分が小さいことを特徴とする特許請求の
範囲第１項に記載の内視鏡装置。2. The first light emission characteristic is centered on red, the second light emission characteristic is centered on blue, the first and second light emission characteristics are overlapped on green, and the amplification factor of the amplification means is set. 2. The endoscope apparatus according to claim 1, wherein the green component is large and the red and blue components are small.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59074296A JPH0658457B2 (en) | 1984-04-13 | 1984-04-13 | Endoscope device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59074296A JPH0658457B2 (en) | 1984-04-13 | 1984-04-13 | Endoscope device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60217327A JPS60217327A (en) | 1985-10-30 |
| JPH0658457B2 true JPH0658457B2 (en) | 1994-08-03 |
Family
ID=13543030
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59074296A Expired - Lifetime JPH0658457B2 (en) | 1984-04-13 | 1984-04-13 | Endoscope device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0658457B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2592455B2 (en) * | 1987-06-11 | 1997-03-19 | オリンパス光学工業株式会社 | Light source device for endoscope |
| JP2866658B2 (en) * | 1988-10-14 | 1999-03-08 | オリンパス光学工業株式会社 | Endoscope device |
| US6185443B1 (en) * | 1997-09-29 | 2001-02-06 | Boston Scientific Corporation | Visible display for an interventional device |
| US8423110B2 (en) * | 2002-01-09 | 2013-04-16 | Boston Scientific Scimed, Inc. | Imaging device and related methods |
-
1984
- 1984-04-13 JP JP59074296A patent/JPH0658457B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60217327A (en) | 1985-10-30 |
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