JPH0326804B2 - - Google Patents
Info
- Publication number
- JPH0326804B2 JPH0326804B2 JP57128619A JP12861982A JPH0326804B2 JP H0326804 B2 JPH0326804 B2 JP H0326804B2 JP 57128619 A JP57128619 A JP 57128619A JP 12861982 A JP12861982 A JP 12861982A JP H0326804 B2 JPH0326804 B2 JP H0326804B2
- Authority
- JP
- Japan
- Prior art keywords
- camera
- signal
- endoscope
- resistor
- terminal
- 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
- 239000003990 capacitor Substances 0.000 claims description 12
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims description 9
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 2
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B9/00—Exposure-making shutters; Diaphragms
- G03B9/70—Exposure-making shutters; Diaphragms with flash-synchronising contacts
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Instruments For Viewing The Inside Of Hollow Bodies (AREA)
- Shutter-Related Mechanisms (AREA)
- Endoscopes (AREA)
Description
【発明の詳細な説明】
この発明は内視鏡の接眼部に装着されるカメラ
の同期信号発生回路に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a synchronization signal generation circuit for a camera attached to an eyepiece of an endoscope.
一般に、カメラにおいては、シヤツタレリーズ
に同期して閉成される同期接点が設けられる。シ
ヤツタレリーズに同期する必要のある装置、たと
えば、ストロボはこの同期接点と電気的に接続さ
れ、接点の閉成を検出して発光を開始する。この
ことは、内視鏡写真撮影においても同様である。
ところが、内視鏡システムにおいては、接続コー
ドが増えることは好ましくない。そのため、同期
接点のみを光源部へ接続するのではなく、同期信
号をカメラから光源部への測光信号に重畳して伝
える方式が考えられる。このためには、カメラ側
に同期接点を含む同期信号発生回路を設ける必要
がある。 Generally, a camera is provided with a synchronization contact that is closed in synchronization with the shutter release. A device that needs to be synchronized with the shutter release, such as a strobe, is electrically connected to this synchronization contact and starts emitting light upon detecting the closure of the contact. This also applies to endoscopic photography.
However, in an endoscope system, it is undesirable to increase the number of connection cords. Therefore, instead of connecting only the synchronization contact to the light source section, a method can be considered in which the synchronization signal is superimposed on the photometric signal sent from the camera to the light source section and transmitted. For this purpose, it is necessary to provide a synchronization signal generation circuit including a synchronization contact on the camera side.
この発明は上述した事情に対処すべくなされた
もので、簡単な構成で、測光信号に重畳されうる
同期信号を出力する内視鏡カメラの同期信号発生
回路を提供することをその目的とする。 The present invention has been made to address the above-mentioned circumstances, and an object thereof is to provide a synchronization signal generation circuit for an endoscopic camera that has a simple configuration and outputs a synchronization signal that can be superimposed on a photometric signal.
以下、図面を参照してこの発明による同期信号
発生回路の一実施例を説明する。第１図はこの一
実施例を含んだ内視鏡写真撮影システムの概略構
成図である。内視鏡１がコネクタ２を介して光源
部３に接続され、内視鏡１の接眼部４にはカメラ
５が装着される。カメラ５は内視鏡写真撮影のた
めのカメラとする。内視鏡１内には、ライトガイ
ド６とイメージガイド７が設けられ、イメージガ
イド７の先端は対物レンズ系８に対向され、他端
は接眼部４内の接眼レンズ９に対向される。さら
に、内視鏡１はカメラ５と光源部３を電気的に接
続する信号線１１を有する。カメラ５にはフイル
ム１２がシヤツタ１４を介して撮影レンズ１３に
対向して設けられる。撮影レンズ１３と内視鏡接
眼部４との間にはビームスプリツタ１６が設けら
れ、接眼部４からの入射光の一部がフイルム１２
に入射され、他の光が90゜進行方向が変えられ、
ビームスプリツタ１６の側部に設けられている受
光素子１５に入射される。受光素子１５の出力信
号が信号処理回路１８に供給される。また、信号
処理回路１８にはレリーズスイツチ１７も接続さ
れる。信号処理回路１８の出力信号は端子１９を
介して内視鏡の信号線１１の一端に供給される。 DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a synchronization signal generation circuit according to the present invention will be described below with reference to the drawings. FIG. 1 is a schematic diagram of an endoscopic photographing system including this embodiment. An endoscope 1 is connected to a light source section 3 via a connector 2, and a camera 5 is attached to an eyepiece section 4 of the endoscope 1. The camera 5 is a camera for taking endoscopic photographs. A light guide 6 and an image guide 7 are provided inside the endoscope 1 , and the tip of the image guide 7 faces an objective lens system 8 , and the other end faces an eyepiece 9 in the eyepiece 4 . Furthermore, the endoscope 1 has a signal line 11 that electrically connects the camera 5 and the light source section 3. The camera 5 is provided with a film 12 facing a photographic lens 13 via a shutter 14. A beam splitter 16 is provided between the photographing lens 13 and the endoscope eyepiece 4, and a part of the incident light from the eyepiece 4 is directed to the film 12.
, the direction of travel of other lights is changed by 90°,
The light is incident on the light receiving element 15 provided on the side of the beam splitter 16. The output signal of the light receiving element 15 is supplied to a signal processing circuit 18 . Further, a release switch 17 is also connected to the signal processing circuit 18 . The output signal of the signal processing circuit 18 is supplied to one end of the signal line 11 of the endoscope via a terminal 19.
光源部３はハロゲンランプ等の観察光源２０と
ストロボ管等の撮影光源２１を有する。撮影光源
２１はレンズ２２、ミラー２３を介して、ライト
ガイド６に対向され、観察光源２０の光路は撮影
光源２１の光路に直交するように配設される。ミ
ラー２３の位置、光源２０，２１の発光は制御回
路２４により制御される。信号線１１の他端が端
子２５を介して制御回路２４の入力端に接続され
る。なお、観察光源２０には集光ミラー２６が配
設される。 The light source section 3 has an observation light source 20 such as a halogen lamp and a photographing light source 21 such as a strobe tube. The photographing light source 21 faces the light guide 6 via a lens 22 and a mirror 23, and the optical path of the observation light source 20 is arranged to be orthogonal to the optical path of the photographing light source 21. The position of the mirror 23 and the light emission of the light sources 20 and 21 are controlled by a control circuit 24. The other end of the signal line 11 is connected to the input end of the control circuit 24 via a terminal 25. Note that the observation light source 20 is provided with a condensing mirror 26 .
カメラ５内の信号処理回路１８がこの実施例を
含んでいて、第２図にこの実施例に係る部分の回
路図を示す。レリーズスイツチ１７の一端は接地
され、その他端およびキヤパシタ３０の一端が抵
抗３２を介して電源端＋Ｖに接続される。キヤパ
シタ３０の他端は抵抗３４を介して接地されると
ともに、ダイオード３６を介して接地される。さ
らに、キヤパシタ３０の他端は抵抗３８を介して
電源端＋Ｖにも接続される。このキヤパシタ３０
とダイオード３６の接続点が同期信号出力端とし
て、図示せぬ受光素子１５からの信号線に接続さ
れる。ここで、ダイオード３６は過大な正電圧が
信号線に発生するのを防ぐものである。 A signal processing circuit 18 in the camera 5 includes this embodiment, and FIG. 2 shows a circuit diagram of a portion related to this embodiment. One end of the release switch 17 is grounded, and the other end and one end of the capacitor 30 are connected to a power supply terminal +V via a resistor 32. The other end of the capacitor 30 is grounded via a resistor 34 and also via a diode 36. Furthermore, the other end of the capacitor 30 is also connected to the power supply terminal +V via a resistor 38. This capacitor 30
The connection point between the diode and the diode 36 is connected to a signal line from the light receiving element 15 (not shown) as a synchronizing signal output end. Here, the diode 36 prevents excessive positive voltage from being generated on the signal line.
この動作を説明するに、写真撮影前はミラー２
３は図示実線で示す位置にあり、観察光源２０か
らの光がライトガイド６に入射されているとす
る。撮影光源２１は消灯されている。レリーズス
イツチ１７はシヤツタレリーズ前は開放されてい
る。そのため、キヤパシタ３０には抵抗３２を介
して電源電圧が充電されている。シヤツタがレリ
ーズされると、レリーズスイツチ１７が連動して
閉成され、キヤパシタ３０の電荷がこのスイツチ
１７を介して瞬間に放電される。そのため、キヤ
パシタ３０とダイオード３６の接続点の電位は第
３図ｂに示すように、シヤツタレリーズに同期し
て一瞬、低レベルになる。第３図ａはレリーズス
イツチ１７の状態を示すもので、高レベルが閉
成、低レベルが開放を表わす。この負の同期パル
スが信号処理回路１８で成形され信号線１１を介
して制御回路２４に供給される。制御回路２４は
この同期パルスに応じてミラー２３を図示破線の
位置に移動させるとともに、観察光源２０を消
し、撮影光源２１を点灯させる。これにより、被
写体が写真撮影に充分な明るさに照明される。被
写体からの反射光がイメージガイド７、ビームス
プリツタ１６を介して受光素子１５に供給され
る。受光素子１５の出力信号が信号処理回路１
８、信号線１１を介して制御回路２４に供給され
る。受光素子１５の出力する測光信号は正レベル
の信号とされ、同期信号と区別されている。制御
回路２４は測光信号を積分して、受光量が所定量
に達すると、シヤツタ動作を停止させる。これに
より、シヤツタレリーズに同期して光源の発光が
行なわれる。 To explain this operation, before taking a photo, mirror 2
3 is located at the position indicated by the solid line in the figure, and light from the observation light source 20 is incident on the light guide 6. The photographing light source 21 is turned off. The release switch 17 is open before the shutter is released. Therefore, the capacitor 30 is charged with the power supply voltage via the resistor 32. When the shutter is released, the release switch 17 is closed, and the charge in the capacitor 30 is instantly discharged through the switch 17. Therefore, the potential at the connection point between the capacitor 30 and the diode 36 momentarily drops to a low level in synchronization with the shutter release, as shown in FIG. 3b. FIG. 3a shows the state of the release switch 17, with a high level indicating closed and a low level indicating open. This negative synchronizing pulse is shaped by the signal processing circuit 18 and supplied to the control circuit 24 via the signal line 11. The control circuit 24 moves the mirror 23 to the position indicated by the broken line in the figure in response to this synchronization pulse, turns off the observation light source 20, and turns on the photographing light source 21. As a result, the subject is illuminated with sufficient brightness for photographing. Reflected light from the subject is supplied to the light receiving element 15 via the image guide 7 and the beam splitter 16. The output signal of the light receiving element 15 is transmitted to the signal processing circuit 1
8, is supplied to the control circuit 24 via the signal line 11. The photometric signal output from the light receiving element 15 is a positive level signal and is distinguished from the synchronization signal. The control circuit 24 integrates the photometric signal and stops the shutter operation when the amount of received light reaches a predetermined amount. Thereby, the light source emits light in synchronization with the shutter release.
なお、この発明は上記実施例に限定されるもの
ではなく、カメラはカメラ本体と、このカメラ本
体と内視鏡とを接続するアダプタとに分かれてい
てもよく、同期信号発生回路はアダプタ内に設け
られていてもよい。 Note that the present invention is not limited to the above embodiments, and the camera may be separated into a camera body and an adapter that connects this camera body and an endoscope, and the synchronization signal generation circuit is included in the adapter. may be provided.
このようにこの発明によれば、カメラのシヤツ
タレリーズに同期して抵抗とキヤパシタの直列回
路を短絡することにより、抵抗とキヤパシタの接
続点から負レベルの同期信号を発生する同期信号
発生回路が提供される。これにより、重畳した測
光信号と同期信号との識別が容易に行える。そし
て、この実施例は抵抗とキヤパシタをレリーズス
イツチに付加するだけでよい簡単な構成である。
さらに、遅れ時間がなくレリーズスイツチの閉成
に正確に同期した信号が得られる利点も有する。 According to the present invention, the synchronization signal generation circuit generates a negative level synchronization signal from the connection point of the resistor and capacitor by short-circuiting the series circuit of the resistor and the capacitor in synchronization with the shutter release of the camera. provided. This makes it easy to distinguish between the superimposed photometric signal and the synchronization signal. This embodiment has a simple configuration that only requires adding a resistor and a capacitor to the release switch.
Furthermore, it has the advantage that a signal accurately synchronized with the closing of the release switch can be obtained without any delay time.
第１図はこの発明による同期信号発生回路を含
んだ内視鏡写真撮影システムの概略構成図、第２
図はこの一実施例の回路図、第３図ａ，ｂはその
動作を示すタイムチヤートである。
１…内視鏡、３…光源部、５…カメラ、１１…
信号線、１７…レリーズスイツチ、２４…制御回
路、３０…キヤパシタ、３２，３４，３８…抵
抗、３６…ダイオード。
FIG. 1 is a schematic configuration diagram of an endoscopic photographing system including a synchronization signal generation circuit according to the present invention, and FIG.
The figure is a circuit diagram of this embodiment, and FIGS. 3a and 3b are time charts showing its operation. 1... Endoscope, 3... Light source part, 5... Camera, 11...
Signal line, 17... Release switch, 24... Control circuit, 30... Capacitor, 32, 34, 38... Resistor, 36... Diode.
Claims (1)
側に測光手段を設け、カメラ側から受光量に応じ
た正の測光信号を内視鏡側へ伝送する内視鏡シス
テムのカメラ側に設けられる同期信号発生回路に
おいて、カメラのレリーズ動作に連動して閉成さ
れるスイツチと、第１端子と第２端子とを有し、
第１端子は前記スイツチを介して接地電源に接続
されるとともに、第１抵抗を介して正の電源に接
続され、第２端子は前記測光信号を内視鏡側へ伝
送する信号線に接続されるとともに、第２抵抗、
第３抵抗を介して接地電源、正の電源にそれぞれ
接続されるキヤパシタとを具備し、前記スイツチ
が閉成されると負の同期パルスが正の測光信号に
重畳されて内視鏡側へ伝送されることを特徴とす
る同期信号発生回路。1 A camera is connected to the eyepiece of the endoscope, a photometric means is provided on the camera side, and a positive photometric signal corresponding to the amount of received light is transmitted from the camera side to the endoscope side. The synchronization signal generation circuit provided includes a switch that is closed in conjunction with the release operation of the camera, a first terminal and a second terminal,
The first terminal is connected to a ground power source via the switch, and is also connected to a positive power source via a first resistor, and the second terminal is connected to a signal line that transmits the photometric signal to the endoscope. At the same time, the second resistor,
A capacitor is connected to a ground power source and a positive power source through a third resistor, and when the switch is closed, a negative synchronizing pulse is superimposed on the positive photometric signal and transmitted to the endoscope side. A synchronous signal generation circuit characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57128619A JPS5918936A (en) | 1982-07-23 | 1982-07-23 | Synchronising signal generator circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57128619A JPS5918936A (en) | 1982-07-23 | 1982-07-23 | Synchronising signal generator circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5918936A JPS5918936A (en) | 1984-01-31 |
| JPH0326804B2 true JPH0326804B2 (en) | 1991-04-12 |
Family
ID=14989262
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57128619A Granted JPS5918936A (en) | 1982-07-23 | 1982-07-23 | Synchronising signal generator circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5918936A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5248314A (en) * | 1975-10-11 | 1977-04-18 | Rollei Werke Franke Heidecke | Electrically light emitting flash lamp adapter |
| JPS55108644A (en) * | 1979-02-14 | 1980-08-21 | Olympus Optical Co Ltd | Endscope photographing apparatus |
-
1982
- 1982-07-23 JP JP57128619A patent/JPS5918936A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5248314A (en) * | 1975-10-11 | 1977-04-18 | Rollei Werke Franke Heidecke | Electrically light emitting flash lamp adapter |
| JPS55108644A (en) * | 1979-02-14 | 1980-08-21 | Olympus Optical Co Ltd | Endscope photographing apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5918936A (en) | 1984-01-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4561429A (en) | Flashlight control apparatus for endoscope | |
| US4273431A (en) | Adapter for coupling a photographic camera with a viewing device | |
| US4362369A (en) | Camera having a data photographing device | |
| JPH0379684B2 (en) | ||
| EP0018126A1 (en) | Apparatus for endoscopic photography | |
| US4354749A (en) | Endoscopic photographing apparatus | |
| US4325618A (en) | Light source apparatus | |
| US4415245A (en) | Movable infrared filter for an auto ranging camera | |
| JPH0326804B2 (en) | ||
| EP0039458A1 (en) | Light supply device for endoscope | |
| JPS5540413A (en) | Test light emitting device of ttl control strobe | |
| US4297017A (en) | Photographic camera apparatus | |
| EP0027271A1 (en) | Photographing system for endoscope | |
| EP0078957B1 (en) | Endoscopic photographing apparatus | |
| EP0026300B1 (en) | Light source apparatus for endoscope | |
| JPH0462735B2 (en) | ||
| US4147420A (en) | Flash camera | |
| JPS58136329A (en) | Light emitting control apparatus for photographic apparatus of eye bottom camera | |
| JP3229876B2 (en) | Fundus camera | |
| JPS6052815A (en) | Camera adapter device for endoscope | |
| JPS6016908Y2 (en) | Self-timer photography device for TTL metering single-lens reflex camera | |
| JPS5925210B2 (en) | camera display device | |
| JPS6336771B2 (en) | ||
| JPS6330408Y2 (en) | ||
| JPS603613A (en) | Photographing signal control device |