JPH0438092A - Image pickup device - Google Patents
Image pickup deviceInfo
- Publication number
- JPH0438092A JPH0438092A JP2144372A JP14437290A JPH0438092A JP H0438092 A JPH0438092 A JP H0438092A JP 2144372 A JP2144372 A JP 2144372A JP 14437290 A JP14437290 A JP 14437290A JP H0438092 A JPH0438092 A JP H0438092A
- Authority
- JP
- Japan
- Prior art keywords
- light
- reflected
- reflection mirror
- phototransistor
- reflecting mirror
- 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
- 230000010287 polarization Effects 0.000 claims abstract description 5
- 238000003384 imaging method Methods 0.000 claims description 6
- 230000001678 irradiating effect Effects 0.000 abstract 2
- 230000003287 optical effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 3
- 238000005286 illumination Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
Landscapes
- Instruments For Viewing The Inside Of Hollow Bodies (AREA)
- Endoscopes (AREA)
- Closed-Circuit Television Systems (AREA)
- Facsimile Scanning Arrangements (AREA)
Abstract
Description
【発明の詳細な説明】
［発明の目的］
（産業上の利用分野）
本発明は、内視鏡装置等に用いられる撮像装置に関する
。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to an imaging device used in an endoscope device or the like.
（従来の技術）
例えば、電子内視鏡装置では、スコープ先端部に小型の
撮像素子を取付け、これによって被写体の画像データを
取込んでいる。(Prior Art) For example, in an electronic endoscope device, a small image sensor is attached to the distal end of a scope, and image data of a subject is captured using this device.
従来において、このような撮像素子としてＣＣＤ （Ｃ
ｈａｎｒｇｅ ｃｏｕｐｌｅｄ ｄｅｖｉｃｅ）か
多く用いられている。Conventionally, CCD (C
Hanrge coupled devices) are often used.
（発明が解決しようとする課題）
しかしながら、ＣＯＤは、ディジタルの駆動信号に同期
して動作するのてディジタル信号によるノイズが発生し
てしまい、高精度な撮像データが得られなくなることが
ある。(Problems to be Solved by the Invention) However, since the COD operates in synchronization with a digital drive signal, noise due to the digital signal is generated, and highly accurate imaging data may not be obtained.
また、ＣＣＤは、撮像する際に、被写体に十分な明るさ
の光を照射しなければならず技術的に困難であるという
課題があった。Furthermore, the CCD has the problem that, when taking an image, it is necessary to irradiate a subject with light of sufficient brightness, which is technically difficult.
この発明はこのような従来の課題を解決するためになさ
れたもので、その目的とするところは、少ない光量で撮
像することができ、かつ、ノイス成分の少ない撮像デー
タを得ることのできる撮像装置を提供することにある。This invention was made in order to solve such conventional problems, and its purpose is to provide an imaging device that can take images with a small amount of light and that can obtain imaging data with few noise components. Our goal is to provide the following.
［発明の構成コ
（課題を解決するための手段）
上記目的を達成するため、本発明は、光導管から出射さ
れた照射光の出射角を時間経過に伴なって所定方向に変
化させる第１の偏光手段と、前記照射光の出射角を時間
経過に伴なって、前記第１の偏光手段に対して垂直方向
に変化させる第２の偏光手段と、前記偏光後の照射光の
被写体による反射光を受光する受光手段と、を有するこ
とが特徴である。[Structure of the Invention (Means for Solving the Problems)] In order to achieve the above object, the present invention provides a first method that changes the emission angle of the irradiation light emitted from the light pipe in a predetermined direction with the passage of time. a polarizing means, a second polarizing means for changing the emission angle of the irradiated light in a direction perpendicular to the first polarizing means over time, and reflection of the polarized irradiated light by a subject. It is characterized by having a light receiving means for receiving light.
（作用）
上述の如く構成すれば、照明光の出射角は第１の偏光手
段によって、所定方向に変化する。また、第２の偏光手
段によって出射角が第１の偏光手段に対して直角方向に
変化する。(Function) With the configuration as described above, the emission angle of the illumination light is changed in a predetermined direction by the first polarization means. Furthermore, the second polarizing means changes the output angle in a direction perpendicular to the first polarizing means.
そして、これによって被写体を走査し、反射した光をホ
ストトランジスタ等の受光手段で受光した後、増幅して
出力している。Then, the object is scanned by this, and the reflected light is received by a light receiving means such as a host transistor, and then amplified and output.
従って、ノイズを低減することができ、また、少ない光
量で撮像することができるようになる。Therefore, noise can be reduced and images can be captured with a small amount of light.
（実施例）
第１図は本発明による撮像装置が適用された内視鏡スコ
ープの一実施例を示す構成図である。(Embodiment) FIG. 1 is a configuration diagram showing an embodiment of an endoscope to which an imaging device according to the present invention is applied.
同図に示すように、内視鏡スコープ１は光源（不図示）
から照射された光を導く光導管２と、光導管２によって
導かれた光を被写体３に出射する出射部４と、被写体３
による反射光を受光するホトトランジスタ５と、ホトト
ランジスタ５で得られた光電流を増幅するアンプ６から
構成されている。As shown in the figure, the endoscope 1 has a light source (not shown)
a light pipe 2 that guides the light irradiated from the light pipe 2; a light emitting section 4 that emits the light guided by the light pipe 2 to the subject 3;
It is composed of a phototransistor 5 that receives reflected light from the phototransistor 5, and an amplifier 6 that amplifies the photocurrent obtained by the phototransistor 5.
第２図は出射部４の内部構成を示しており、第１の反射
鏡７と第２の反射鏡８を有している。FIG. 2 shows the internal configuration of the emission section 4, which includes a first reflecting mirror 7 and a second reflecting mirror 8. As shown in FIG.
両反射鏡７．８は、それぞれ６角柱状に構成され、この
うち第１の反射鏡７は、その中心軸ＸＸ″が縦方向を向
いており、これを中心として所定速度で回転するように
なっている。Both reflecting mirrors 7.8 are each configured in the shape of a hexagonal column, and the first reflecting mirror 7 has its center axis XX'' facing in the vertical direction, and is rotated at a predetermined speed around this. It has become.
また、第２の反射鏡８は、その中心軸Ｙ−Ｙ −が横方
向（軸ｘ−ｘ ’と直交する方向）を向いており、これ
を中心に所定速度で回転するようになっている。Further, the second reflecting mirror 8 has its central axis Y-Y- facing in the horizontal direction (direction perpendicular to the axis x-x'), and is configured to rotate around this at a predetermined speed. .
次に、本実施例の作用について説明する。Next, the operation of this embodiment will be explained.
光導管２によって照射光が導かれると、この照射光は出
射部４内において、第１の反射鏡７の側面に入光する。When the irradiation light is guided by the light pipe 2, this irradiation light enters the side surface of the first reflecting mirror 7 within the emission section 4.
このとき、第１の反射鏡７は、軸Ｘ−Ｘ−を中心として
回転するので、光の反射角度が時間経過に伴なって横方
向に変化する。At this time, since the first reflecting mirror 7 rotates around the axis XX-, the reflection angle of the light changes in the lateral direction as time passes.
いま、この反射鏡７を回転数ｎ［ｒ、ｐ、ｍコで回転さ
せると、６角柱状に構成されているので、６０’回転周
期で反射角の変化が繰り返されることになる。Now, when this reflecting mirror 7 is rotated at rotational speeds n[r, p, m, the reflection angle will change repeatedly at a rotation period of 60' since it is configured in a hexagonal column shape.
その結果、第１の反射鏡７で反射した光は、横方向（水
平方向）の同一直線上を（１０／ ｎ ）［秒］周期で
走査することになる。As a result, the light reflected by the first reflecting mirror 7 scans the same straight line in the lateral direction (horizontal direction) at a period of (10/n) [seconds].
そして、この反射光は第２の反射鏡８の側面に入光する
。This reflected light then enters the side surface of the second reflecting mirror 8.
この反射鏡８は、軸Ｙ−Ｙ−を中心として回転するので
、入光した光の反射角度は時間経過に伴なって縦方向に
変化する。また、このときの回転速度を（ｎ／６）［ｒ
、ｐ、ｍｌに設定すると、第１の反射鏡７が１回転する
間に第２の反射鏡８は６０″回転するので、この反射鏡
８で反射した光は横方向に６回走査する間に縦方向に１
回走査することになる。Since this reflecting mirror 8 rotates around the axis YY-, the reflection angle of the incident light changes in the vertical direction as time passes. Also, the rotation speed at this time is (n/6) [r
, p, ml, the second reflecting mirror 8 rotates 60'' while the first reflecting mirror 7 rotates once, so the light reflected by this reflecting mirror 8 scans six times in the horizontal direction. vertically 1
It will be scanned twice.
その後、第２の反射鏡８で反射した光は、第１図に示す
出射部４から出射され、被写体３に照射される。そして
、この被写体による反射光はホトトランジスタ５によっ
て受光された後、アンプ６で増幅され、画像データとし
て次工程の機器へ伝送されるのである。Thereafter, the light reflected by the second reflecting mirror 8 is emitted from the emitting section 4 shown in FIG. 1, and is irradiated onto the subject 3. The reflected light from the object is received by a phototransistor 5, amplified by an amplifier 6, and transmitted as image data to equipment for the next process.
このようにして、本実施例では、第１の反射鏡７、及び
第２の反射鏡８を回転させ、反射角を変化させることで
光導管２によって導かれた照射光を走査させている。そ
して、この照射光の被写体３による反射光をホトトラン
ジスタ５で受光して画像データを得ている。In this manner, in this embodiment, the first reflecting mirror 7 and the second reflecting mirror 8 are rotated to change the reflection angle, thereby causing the irradiation light guided by the light pipe 2 to scan. Then, the phototransistor 5 receives the reflected light of the irradiated light from the subject 3 to obtain image data.
従って、ディジタルの駆動信号を必要としないので、ノ
イズ成分の少ない鮮明な画像データを得ることができる
。Therefore, since a digital drive signal is not required, clear image data with few noise components can be obtained.
ま゛た、ホトトランジスタうで反射光を受光しているの
で、少ない光量で撮像することができるようになる。Furthermore, since the reflected light is received by the phototransistor, it becomes possible to take an image with a small amount of light.
［発明の効果コ
以上説明したように、本発明では、照明光の出射角を第
１の偏光手段、及び第２の偏光手段で変化させることで
被写体を走査し、この反射光を受光して画像信号を得て
いる。[Effects of the Invention] As explained above, in the present invention, a subject is scanned by changing the emission angle of illumination light by the first polarization means and the second polarization means, and this reflected light is received. An image signal is being obtained.
従って、ＣＣＤのようにディジタルの駆動信号を必要と
しないので、ノイズ成分の少ない鮮明な画像データを得
ることができる。Therefore, unlike a CCD, a digital drive signal is not required, so clear image data with less noise components can be obtained.
また、ＣＯＤと比較してホトトランジスタ等の受光素子
は少ない光量で撮像することができるので光源を容易に
構成することができるという効果が得られる。Furthermore, since a light receiving element such as a phototransistor can capture an image with a smaller amount of light than a COD, it is possible to easily configure a light source.
第１図は本発明の一実施例を示す構成図、第２図は該実
施例における出射部の内部構成図である。
１・・・内視鏡スコープ ２・・・光導管４・・・出
射部 ５・・・ホトトランジスタ６・・・ア
ンプ ７・・・第１の反射鏡８・・・第２の
反射鏡FIG. 1 is a configuration diagram showing an embodiment of the present invention, and FIG. 2 is an internal configuration diagram of an emitting section in the embodiment. DESCRIPTION OF SYMBOLS 1... Endoscope scope 2... Light conduit 4... Output part 5... Phototransistor 6... Amplifier 7... First reflecting mirror 8... Second reflecting mirror
Claims (1)
なって所定方向に変化させる第１の偏光手段と、 前記照射光の出射角を時間経過に伴なって、前記第１の
偏光手段に対して垂直方向に変化させる第２の偏光手段
と、 前記偏光後の照射光の被写体による反射光を受光する受
光手段と、 を有することを特徴とする撮像装置。[Scope of Claims] A first polarizing means for changing the emission angle of the irradiation light emitted from the light pipe in a predetermined direction over time; An imaging device comprising: a second polarizing means that changes the polarization in a direction perpendicular to the first polarizing means; and a light receiving means that receives the reflected light from a subject of the polarized irradiation light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2144372A JPH0438092A (en) | 1990-06-04 | 1990-06-04 | Image pickup device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2144372A JPH0438092A (en) | 1990-06-04 | 1990-06-04 | Image pickup device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0438092A true JPH0438092A (en) | 1992-02-07 |
Family
ID=15360590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2144372A Pending JPH0438092A (en) | 1990-06-04 | 1990-06-04 | Image pickup device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0438092A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2783330A1 (en) * | 1998-09-15 | 2000-03-17 | Assist Publ Hopitaux De Paris | Observation apparatus for interior of body, comprises illumination source, sweeping unit, flexible fiber optic channel, and optical block adjacent to object and image presentation unit |
| JP2001046321A (en) * | 1999-08-09 | 2001-02-20 | Asahi Optical Co Ltd | Endoscope device |
| US6545260B1 (en) | 1999-11-19 | 2003-04-08 | Olympus Optical Co., Ltd. | Light scanning optical device which acquires a high resolution two-dimensional image without employing a charge-coupled device |
-
1990
- 1990-06-04 JP JP2144372A patent/JPH0438092A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2783330A1 (en) * | 1998-09-15 | 2000-03-17 | Assist Publ Hopitaux De Paris | Observation apparatus for interior of body, comprises illumination source, sweeping unit, flexible fiber optic channel, and optical block adjacent to object and image presentation unit |
| WO2000016151A1 (en) * | 1998-09-15 | 2000-03-23 | Assistance Publique - Hopitaux De Paris | Device for observation inside a body providing improved quality of observation |
| US6470124B1 (en) | 1998-09-15 | 2002-10-22 | Assistance Publique - Hopitaux De Paris | Device for observation inside a body providing improved quality of observation |
| JP2001046321A (en) * | 1999-08-09 | 2001-02-20 | Asahi Optical Co Ltd | Endoscope device |
| US6545260B1 (en) | 1999-11-19 | 2003-04-08 | Olympus Optical Co., Ltd. | Light scanning optical device which acquires a high resolution two-dimensional image without employing a charge-coupled device |
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