JPH0546928B2 - - Google Patents
Info
- Publication number
- JPH0546928B2 JPH0546928B2 JP58184694A JP18469483A JPH0546928B2 JP H0546928 B2 JPH0546928 B2 JP H0546928B2 JP 58184694 A JP58184694 A JP 58184694A JP 18469483 A JP18469483 A JP 18469483A JP H0546928 B2 JPH0546928 B2 JP H0546928B2
- Authority
- JP
- Japan
- Prior art keywords
- pulse
- solid
- image sensor
- video signal
- state image
- 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
- 238000003780 insertion Methods 0.000 claims description 2
- 230000037431 insertion Effects 0.000 claims description 2
- 230000003287 optical effect Effects 0.000 claims description 2
- 238000005286 illumination Methods 0.000 description 7
- 238000003384 imaging method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 230000001678 irradiating effect Effects 0.000 description 3
- 230000002542 deteriorative effect Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 230000015654 memory Effects 0.000 description 2
- 239000013307 optical fiber Substances 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Landscapes
- Endoscopes (AREA)
- Instruments For Viewing The Inside Of Hollow Bodies (AREA)
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は、固体撮像素子を用いかつ照明手段と
して光源よりの光を回転フイルタを介在して赤、
緑及び青色（以下Ｒ、Ｇ、Ｂという）光を順次透
過させ被観察体へ照射するように構成した内視鏡
装置において、回転フイルタの駆動手段にパルス
モータを用いた場合に、固体撮像素子にて変換さ
れる電気信号にノイズが発生して画質を劣化させ
るのを防止するようにした内視鏡装置に関する。[Detailed Description of the Invention] [Technical Field of the Invention] The present invention uses a solid-state image sensor and uses a rotating filter to convert light from a light source into red, red, and red.
In an endoscope device configured to sequentially transmit green and blue (hereinafter referred to as R, G, and B) light and irradiate the object to be observed, when a pulse motor is used as a driving means for a rotating filter, a solid-state image sensor The present invention relates to an endoscope device that prevents deterioration of image quality due to the occurrence of noise in electrical signals converted by an endoscope.
近年、電荷結合素子等の固体撮像素子を撮像手
段に用いた内視鏡が種々提案されている。
In recent years, various endoscopes using solid-state imaging devices such as charge-coupled devices as imaging means have been proposed.
上記固体撮像素子を用いた内視鏡は、光学繊維
束（フアイババンドル）で形成したイメージガイ
ドを用いた内視鏡におけるフアイバの折損によつ
て画像の質が低下することを防止できると共に、
画像の記録等が容易になる等の利点を有し、集積
化技術による進展と共に、益々小型化及び解像力
の向上が見込まれるため、今後広く用いられる状
況にある。 An endoscope using the solid-state imaging device described above can prevent image quality from deteriorating due to fiber breakage in an endoscope using an image guide formed of an optical fiber bundle (fiber bundle).
It has the advantage of making it easier to record images, etc., and is expected to become more compact and have improved resolution as integration technology progresses, so it is expected to be widely used in the future.
ところで、このような内視鏡装置において、撮
影像をカラー表示する場合、被観察体へ照明光を
照射する手段として光源よりの光を回転フイルタ
を通し回転に伴つて得られるＲ、Ｇ、Ｂ光を順次
照射することにより、その反射光をＲ、Ｇ、Ｂご
とに固体撮像素子に受光させて電気信号に変換
し、この電気信号に基づいてカラー表示するよう
にしている。上記回転フイルタは、その回転面に
Ｒ、Ｇ、Ｂ用フイルタが交互に配列されていて、
回転フイルタが一定速度で回転するに伴い、回転
面に対向して固定された光源ランプからの照明光
をＲ、Ｇ、Ｂ用フイルタにて順次透過させるよう
に構成されている。 By the way, in such an endoscope device, when displaying a captured image in color, the light from the light source is passed through a rotating filter as a means for irradiating illumination light onto the object to be observed, and R, G, and B images obtained as the image is rotated are displayed. By sequentially irradiating light, the solid-state imaging device receives the reflected light for each of R, G, and B and converts it into an electrical signal, and a color display is performed based on this electrical signal. The rotating filter has R, G, and B filters arranged alternately on its rotating surface,
As the rotary filter rotates at a constant speed, it is configured to sequentially transmit illumination light from a light source lamp fixed opposite to the rotating surface through the R, G, and B filters.
したがつて、カラー表示する場合、回転フイル
タの回転速度と、固体撮像素子に蓄積される信号
電荷を読み出す周期とは正確に周期がとられてい
ることが必要となり、このため回転フイルタを回
転させるモータとしてパルスモータ（ステツピン
グモータともいう）を用いて回転速度を画像をカ
ラー表示するのに最適な速度となるように制御す
ることが行われている。 Therefore, when displaying in color, it is necessary that the rotation speed of the rotary filter and the period of reading out the signal charges accumulated in the solid-state image sensor are accurately matched. A pulse motor (also referred to as a stepping motor) is used as the motor, and its rotational speed is controlled to the optimum speed for displaying an image in color.
しかし、パルスモータを回転駆動源として用い
た場合、駆動パルスの立上り又は立下り時にノイ
ズが発生し、このノイズが固体撮像素子から読み
出された電気信号（映像信号）に混入して表示画
像に表われるという問題があつた。 However, when a pulse motor is used as a rotational drive source, noise is generated at the rise or fall of the drive pulse, and this noise mixes into the electrical signal (video signal) read out from the solid-state image sensor and changes the displayed image. There was a problem of appearance.
本発明は上述した点に鑑み、固体撮像素子を用
いた内視鏡装置において、Ｒ、Ｇ、Ｂ光を照射す
るために用いられる回転フイルタの回転駆動源と
してパルスモータを使用する場合、固体撮像素子
からの電気信号にノイズが混入して画像を劣化さ
せるのを防止するようにした内視鏡装置を提供す
ることである。
In view of the above-mentioned points, the present invention provides an endoscope system using a solid-state image sensor, in which a pulse motor is used as a rotation drive source for a rotary filter used for irradiating R, G, and B light. An object of the present invention is to provide an endoscope device that prevents noise from being mixed into electrical signals from elements and deteriorating images.
本発明の内視鏡装置は、Ｒ、Ｇ、Ｂ光照射用回
転フイルタの回転駆動源としてパルスモータを用
いた場合、モータ駆動用パルスの立上り又は立下
りのタイミングを、固体撮像素子から読み出され
る映像信号の水平帰線期間に一致させた回路構成
とすることにより、駆動パルスによつて発生する
ノイズを映像信号の水平帰線時間内に生じさせて
映像信号部分には影響を与えないようにするもの
である。
In the endoscope apparatus of the present invention, when a pulse motor is used as a rotational drive source for the rotary filter for R, G, and B light irradiation, the timing of the rise or fall of the motor drive pulse is read out from the solid-state image sensor. By configuring the circuit to match the horizontal retrace period of the video signal, noise generated by drive pulses can be generated within the horizontal retrace time of the video signal and not affect the video signal portion. It is something to do.
以下、図面に基づいて本発明の実施例を説明す
る。
Embodiments of the present invention will be described below based on the drawings.
第１図は本発明に係る内視鏡装置の構成を示す
ブロツク図で、第２図及び第３図はその動作を説
明するタイミングチヤート及び説明図である。 FIG. 1 is a block diagram showing the configuration of an endoscope apparatus according to the present invention, and FIGS. 2 and 3 are timing charts and explanatory diagrams illustrating its operation.
第１図において、符号１は内視鏡挿入部の先端
構成部で、その先端には対物レンズ２及び照明レ
ンズ３が並行して配設されている。そして、対物
レンズ２の後方には固体撮像素子４が配置され、
その受光面に被観察体からの光学像が結像されて
受光されるようになつている。一方、照明レンズ
３の後方には光学フアイバ束等によるライトガイ
ド５が配設されていて、ライトガイド５の後端面
には回転フイルタ６の回転面が対向して配設され
さらにこの回転フイルタ６を介在し前記ライトガ
イド５の後端面に対向した位置に集光レンズ７及
び光源ランプ８が配置され、回転フイルタ６を通
して照明光がライトガイド５へ照射されるように
なつている。回転フイルタ６はその回転面にＲ、
Ｇ、Ｂ用色フイルタが交互に配列され、回転に伴
つて照明光が順次Ｒ、Ｇ、Ｂ用の各フイルタを透
過してライトガイド５へ入射するようになつてい
る。回転フイルタ６の回転軸は伝達系９を介して
パルスモータ１０に連結し、モータ駆動部１１か
らの駆動パルスによつてパルス駆動されるように
構成されている。さらに、回転フイルタ６の外周
辺には、スタートパルス検出部１２が固設されて
いて、回転フイルタ６が１回転するごとにスター
トパルスPsが出力されるようにしている。そし
て、ライトガイド５及び照明レンズ３を経て照射
されたＲ、Ｇ、Ｂ光は順次被観察体を照明し、そ
の反射光が固体撮像素子４に順次受光され信号電
荷として蓄積されることになる。固体撮像素子４
に蓄積された電荷は、読出用クロツク信号CKrに
よつて駆動されるドライバ回路１３を用いてＲ、
Ｇ、Ｂごとに電気信号に変換され、さらにプリア
ンプ１４を通してＲ、Ｇ、Ｂの映像信号Ｖとして
次段の増幅部１５へ入力される。Ｒ、Ｇ、Ｂの増
幅出力はマルチプレクサ部１６にて順次切り換え
られて次段のＲ、Ｇ、Ｂ用各フレームメモリ１
７，１８，１９へ一旦蓄えられ、これらのメモリ
から読み出してＲ、Ｇ、Ｂ信号としてカラーテレ
ビジヨンモニタ２０へ出力されてカラー表示され
るようになつている。マルチプレクサ部１６は
Ｒ、Ｇ、Ｂ信号に対応した三つのスイツチSW1，
SW2，SW3から構成されていて、これらのスイツ
チはマルチプレクサ用ゲート信号発生部２１から
のスイツチ用ゲート信号SG1，SG2，SG3によつ
て順次切り換えられるようになつている。符号２
２は所定周波数の信号を発振する発振部で、この
発振器２２からの信号は分周器２３にて分周され
て水平同期パルスＨとしてモータ駆動部１１へ供
給されるようになつている。また、発振器２２か
らの信号は前記スタートパルス検出部１２からの
検出パルスPsと共に読出ゲート信号発生部２４へ
入力されて、読出ゲート信号Grを作成する。そ
して、読出ゲート信号Grは発振器２２からの信
号と共にアンド回路２５へ入力され、読出用クロ
ツク信号CKrをドライバ回路１３へ出力するよう
になつている。また、読出ゲート信号Grは前記
スタートパルス検出部１２からの検出パルスPsと
共にマルチプレクサ用ゲート信号発生部２１へ入
力されて、マルチプレクサ部１６の各スイツチ
SW1，SW2，SW3を切り換えるための三つのスイ
ツチ用ゲート信号SG1，SG2，SG3を作成するよ
うになつている。 In FIG. 1, reference numeral 1 denotes a distal end component of an endoscope insertion section, and an objective lens 2 and an illumination lens 3 are arranged in parallel at the distal end. A solid-state image sensor 4 is arranged behind the objective lens 2,
An optical image from the object to be observed is formed on the light receiving surface and the light is received. On the other hand, a light guide 5 made of an optical fiber bundle or the like is disposed behind the illumination lens 3, and a rotating surface of a rotary filter 6 is disposed opposite to the rear end surface of the light guide 5. A condensing lens 7 and a light source lamp 8 are disposed at positions facing the rear end surface of the light guide 5 with the light guide 5 interposed therebetween, and illumination light is irradiated onto the light guide 5 through the rotating filter 6. The rotating filter 6 has R on its rotating surface.
G and B color filters are arranged alternately, and as the light rotates, illumination light passes through each of the R, G, and B filters in sequence and enters the light guide 5. The rotating shaft of the rotary filter 6 is connected to a pulse motor 10 via a transmission system 9, and is configured to be pulse-driven by drive pulses from a motor drive section 11. Furthermore, a start pulse detection section 12 is fixedly installed around the outer periphery of the rotary filter 6, so that a start pulse Ps is output every time the rotary filter 6 rotates once. The R, G, and B lights irradiated through the light guide 5 and the illumination lens 3 sequentially illuminate the object to be observed, and the reflected light is sequentially received by the solid-state image sensor 4 and accumulated as signal charges. . Solid-state image sensor 4
The charges accumulated in R ,
Each of G and B is converted into an electric signal, and is further inputted to the next stage amplification section 15 as R, G, and B video signals V through a preamplifier 14. The amplified outputs of R, G, and B are sequentially switched by the multiplexer section 16 and sent to each frame memory 1 for R, G, and B at the next stage.
7, 18, and 19, and then read out from these memories and output as R, G, and B signals to a color television monitor 20 for color display. The multiplexer section 16 has three switches SW 1 corresponding to R, G, and B signals.
It consists of SW 2 and SW 3 , and these switches can be sequentially switched by the switch gate signals SG 1 , SG 2 and SG 3 from the multiplexer gate signal generator 21. code 2
Reference numeral 2 denotes an oscillator section that oscillates a signal of a predetermined frequency, and the signal from this oscillator 22 is frequency-divided by a frequency divider 23 and supplied to the motor drive section 11 as a horizontal synchronizing pulse H. Further, the signal from the oscillator 22 is inputted to the read gate signal generator 24 together with the detection pulse P s from the start pulse detector 12 to generate the read gate signal G r . The read gate signal G r is input to the AND circuit 25 together with the signal from the oscillator 22 , and the read clock signal CK r is output to the driver circuit 13 . Further, the read gate signal G r is inputted to the multiplexer gate signal generating section 21 together with the detection pulse P s from the start pulse detecting section 12 , and each switch of the multiplexer section 16 is inputted to the multiplexer gate signal generating section 21 .
Three switch gate signals SG 1 , SG 2 , and SG 3 for switching SW 1 , SW 2 , and SW 3 are created.
このような構成では、パルスモータ１０をパル
ス駆動するための駆動パルスは、発振器２２から
の信号を分周器２３にて分周し、固体撮像素子４
から出力される映像信号Ｖの水平帰線期間に一致
した第２図に示すような水平同期パルスＨを作成
することによつて得ている。即ち、水平同期パル
スＨがモータ駆動部１１へ入力パルスとして供給
されることになる。モータ駆動部１１はこの水平
同期パルスＨを入力し、例えばパルスモータ１０
が１〜２相励磁方式の場合には第２図に示すよう
なＡ相、Ｂ相、相、相の駆動パルスPDをパ
ルスモータ１０へ出力することになる。したがつ
て、第３図に示すように駆動パルスPDの立上り
は、固体撮像素子４から読み出された映像信号Ｖ
の水平帰線期間と一致するため、駆動パルスPD
の立上りによつてノイズＮが発生しても、そのノ
イズＮは映像信号Ｖの水平帰線時間内で生じるこ
とになり、情報を含んだ映像信号部分には影響を
与えないことになる。勿論、駆動パルスPDの立
下りについて同様である。 In such a configuration, a drive pulse for pulse-driving the pulse motor 10 is generated by frequency-dividing a signal from an oscillator 22 by a frequency divider 23 and outputting a drive pulse to the solid-state image sensor 4.
This is obtained by creating a horizontal synchronizing pulse H as shown in FIG. 2, which coincides with the horizontal retrace period of the video signal V output from the. That is, the horizontal synchronizing pulse H is supplied to the motor drive unit 11 as an input pulse. The motor drive unit 11 inputs this horizontal synchronization pulse H, and, for example, the pulse motor 10
In the case of a one- to two-phase excitation method, drive pulses P D of A phase, B phase, phase, and phase as shown in FIG. 2 are output to the pulse motor 10. Therefore, as shown in FIG .
The driving pulse P D
Even if noise N occurs due to the rise of V, the noise N will occur within the horizontal retrace time of the video signal V, and will not affect the video signal portion containing information. Of course, the same applies to the falling edge of the drive pulse PD .
なお、上記実施例では、ライン転送式の固体撮
像素子４を用いた場合の構成を示しているが、固
体撮像素子４としてはフレーム転送式及び垂直イ
ンタライン転送式のものを用いて構成することも
可能である。 Note that although the above embodiment shows a configuration using a line transfer type solid-state image sensor 4, the solid-state image sensor 4 may be configured using a frame transfer type or a vertical interline transfer type. is also possible.
以上述べたように本発明によれば、固体撮像素
子を用いた内視鏡装置において、Ｒ、Ｇ、Ｂ光を
回転フイルタを用いて順次照射する場合、回転フ
イルタの駆動用に用いられるパルスモータの駆動
パルスとして、固体撮像素子から得られる映像信
号の水平帰線期間のタイミングに合つたパルスを
作成し使用するので、駆動パルスの立上り又は立
下りによつてノイズが発生してもノイズは映像信
号の水平帰線時間内に生じ、表示される画像に影
響を与えることがなくなり、良質な画像が得られ
る。したがつて、パルスモータを用いて回転フイ
ルタを駆動できるので、映像信号の読出しタイミ
ングもとり易く、カラー表示可能な内視鏡装置を
構成する上で有利となる。
As described above, according to the present invention, in an endoscope apparatus using a solid-state image sensor, when R, G, and B lights are sequentially irradiated using a rotating filter, the pulse motor used for driving the rotating filter is As the drive pulse of the image pickup device, a pulse that matches the timing of the horizontal retrace period of the video signal obtained from the solid-state image sensor is created and used, so even if noise occurs due to the rise or fall of the drive pulse, the noise will be removed from the image. This occurs during the horizontal retrace time of the signal and does not affect the displayed image, resulting in a high-quality image. Therefore, since the rotary filter can be driven using a pulse motor, it is easy to set the readout timing of the video signal, which is advantageous in configuring an endoscope device capable of color display.
第１図は本発明に係る内視鏡装置の構成を示す
ブロツク図、第２図はモータ駆動部の入出力パル
スを示すタイミングチヤート、第３図は駆動パル
ス立上り時の動作説明図である。
１……先端構成部、４……固体撮像素子、６…
…回転フイルタ、８……光源ランプ、１０……パ
ルスモータ、１１……モータ駆動部、２２……発
振器、２３……分周器。
FIG. 1 is a block diagram showing the configuration of an endoscope apparatus according to the present invention, FIG. 2 is a timing chart showing input/output pulses of the motor drive section, and FIG. 3 is an explanatory diagram of the operation at the rising edge of the drive pulse. 1...Tip component, 4...Solid-state imaging device, 6...
... Rotating filter, 8 ... Light source lamp, 10 ... Pulse motor, 11 ... Motor drive section, 22 ... Oscillator, 23 ... Frequency divider.
Claims (1)
察体からの光学像を受光し映像信号に変換する固
体撮像素子と、赤、緑及び青色光を透過する透過
領域が交互に配置され光源よりの光を透過する回
転フイルタを備え、被観察体へ赤、緑及び青色光
を順次照射する照射手段と、前記回転フイルタを
駆動するパルスモータと、前記固体撮像素子にて
変換された映像信号の水平帰線期間とタイミング
の合つた駆動用パルスを作成し前記パルスモータ
へ供給する駆動パルス作成手段とを具備し、前記
固体撮像素子からの映像信号に基づいてカラー表
示するように構成したことを特徴とする内視鏡装
置。1. A solid-state image sensor, which is disposed at the tip component of the endoscope insertion section and receives an optical image from the object to be observed and converts it into a video signal, and a transmissive area that transmits red, green, and blue light are arranged alternately. an irradiation means that sequentially irradiates the object to be observed with red, green, and blue light; a pulse motor that drives the rotary filter; and a pulse motor that drives the rotary filter; A driving pulse generating means for generating a driving pulse whose timing matches the horizontal retrace period of the video signal and supplying the driving pulse to the pulse motor, and is configured to display in color based on the video signal from the solid-state image sensor. An endoscope device characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58184694A JPS6076717A (en) | 1983-10-03 | 1983-10-03 | Endoscope device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58184694A JPS6076717A (en) | 1983-10-03 | 1983-10-03 | Endoscope device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6076717A JPS6076717A (en) | 1985-05-01 |
| JPH0546928B2 true JPH0546928B2 (en) | 1993-07-15 |
Family
ID=16157737
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58184694A Granted JPS6076717A (en) | 1983-10-03 | 1983-10-03 | Endoscope device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6076717A (en) |
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| US9925395B2 (en) | 2005-11-18 | 2018-03-27 | Mevion Medical Systems, Inc. | Inner gantry |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0625827B2 (en) * | 1985-08-19 | 1994-04-06 | オリンパス光学工業株式会社 | Light source optical system for endoscope |
| JPS62153603A (en) * | 1985-12-26 | 1987-07-08 | 川崎重工業株式会社 | Pulverized coal boiler with precombustion apparatus |
| JP2837849B2 (en) * | 1988-04-15 | 1998-12-16 | オリンパス光学工業株式会社 | Light source device for endoscope |
-
1983
- 1983-10-03 JP JP58184694A patent/JPS6076717A/en active Granted
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Also Published As
| Publication number | Publication date |
|---|---|
| JPS6076717A (en) | 1985-05-01 |
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