WO1991003201A1 - Endoscope with tv camera - Google Patents

Endoscope with tv camera

Info

Publication number
WO1991003201A1
WO1991003201A1 PCT/DE1990/000659 DE9000659W WO9103201A1 WO 1991003201 A1 WO1991003201 A1 WO 1991003201A1 DE 9000659 W DE9000659 W DE 9000659W WO 9103201 A1 WO9103201 A1 WO 9103201A1
Authority
WO
Grant status
Application
Patent type
Prior art keywords
image
video
endoscope
camera
light
Prior art date
Application number
PCT/DE1990/000659
Other languages
German (de)
French (fr)
Inventor
Klaus Irion
Jürgen RUDISCHHAUSER
Original Assignee
Karl Storz Gmbh & Co.
Priority date (The priority date 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 date listed.)
Filing date
Publication date

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00Instruments 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
    • A61B1/04Instruments 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
    • A61B1/042Instruments 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 a proximal camera, e.g. a CCD camera
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00Instruments 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
    • A61B1/04Instruments 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
    • A61B1/055Instruments 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 having rod-lens arrangements

Abstract

An endoscope (10) has an endoscope objective mounted on its distal end. The image produced by the objective is directed by an image-conductor unit (2) to the proximal end, at which it can be observed by means of an ocular (1). An illuminating device comprises a fibre optic (4), which conducts the light from a light source to the distal end and which surrounds, at least partly, the image-conductor unit (2). The endoscope has a lateral connecting branch (3) for a fibre optic cable (15) which connects the endoscope to the light source. An element (14) can be placed in the path of the observation beam in front of the ocular (1), so that the observation beam (2) is directed, at least partially, onto the pickup element (11) of a video camera (20).

Description

An endoscope with a TV camera

Description

The invention relates to an endoscope having a arranged at the distal end of the endoscope lens whose image lei¬ an image-transmitting unit to the proximal end tet, to which it is viewable through an eyepiece, and with an illumination device, the conductor has a Licht¬, of the directs light from a light source to the distal end, and has a lateral connecting branch for the endoscope with the light source connecting optical fiber cables.

Endoscopes of the aforementioned type are generally be¬ known and have long been offered as standard by the major manufacturers of endoscopes groups, such as. Karl Storz GmbH & Co. If in such endoscopes is an illustration of the endoscope image on a monitor ge wishes is, is set either directly or ange¬ a miniature video camera via an image splitter to the eyepiece which receives the "eyepiece-image" by means of a lens and an image recorder , Such a video camera, for example, the video camera "Endopocket" of Karl Storz GmbH & Co.

The known endoscopes with "flanged" video camera have now share certain handling Nach¬ in practice:

Miniature video cameras have, due to the still relatively large for imaging the "eyepiece-image" necessary lens dimensions can gen up to 5 cm, and more betra¬ in length up to 10 cm and in width.

Furthermore, will be extended by the video camera, the overall length of the endoscope and thus changing the weight distribution. but an altered weight distribution interfere with the balancing of the endos- scopic unit inserted in the body and thus changing the handling of the ensemble negative.

Ultimately, the optical overhead that is required for imaging an eyepiece, comparatively large.

The invention is based on the object, an endoscope according to the preamble of claim 1 zubilden continue such that a video image display is possible, without significantly beeinträch¬ the usual handling of the endoscope.

An achievement of this object, in Patent¬ challenging one given.

According to the invention an element is so introduced into the observation beam path in front of the eyepiece, which is at least partially addressed the Beo¬ bach tung-ray beam with respect to its transmission to an image sensor of a camera Video¬. The video camera is so Erfin dung as no longer at the eyepiece or lartrichter the Oku- but mounted in front of the eyepiece. A der¬ like configuration has a number of advantages: insbeson particular, the optical overhead is lower since no eyepiece image, but the real image generated by the image guide unit on the image sensor of the video camera must be abgebil¬ det. Moreover, the overall volume of the endoscope is not increased "according to the eyepiece", so that the operator can manipulate the endoscope in a conventional manner. Further, the "lever arm" is less, since the Video¬ mounted camera closer to the center of gravity of the endoscopic unit.

Further developments of the invention are subject of the subclaims claims:

According to claim 2 the material introduced into the observation beam path in front of the eyepiece member is a deflecting element that the observation beam at least partially diverts to a second viewing opening, in which the Videokame¬ ra is attachable. This design of the endoscope of the invention has in particular the advantage that it at THROUGH USE eg. A partially transparent mirror as Umlenke¬ lement (claim 3) is possible to simultaneously display a Video¬ image and view the endoscopic image in the normal way through the eyepiece , In this case, surgical instruments are available for the person under examination, other control elements, such as. Stopcocks of the shaft, etc. in the normal distance from the eyepiece and the eye cup, since the video camera is attached to the second viewing opening in front of the eyepiece, so that during a operation under visual "blind" durchzuführen¬ not change movements.

It is particularly advantageous if a further deflecting element according to claim 4 outside the observation beam path, at least provided so that er¬ a laterally correct image at the second viewing opening is testifies. Optionally, however, can also be dispensed with the further deflection element and the "image correction", for example. By electronic means are made so that a laterally correct image is represented on a monitor.

The invention introduced in the beam path Um¬ steering member can of course be provided in the space between the last optical surface of the Bildleiter- unit and the eyepiece. In an endoscope, wherein the image guide unit consists sensystemen from relay Lin¬ having rod lenses, it is ever nevertheless according to claim 5 preferred that the deflection element which deflects the beam path onto the second viewing opening um¬, in a rod lens is integrated. Such a design not only has the advantage that the Umlenke¬ lement in any case within the normal length of an endoscope can be accommodated, but also the advantage that it is readily possible without zu¬ additional intermediate image of the image sensor camera Video¬ to arrange in the proximal image plane of the last relay Linsensytems.

but of course it is also possible, hen an intermediate imaging system for the second viewing opening vorzuse¬ that zwischenabbildet the image generated by the image guide unit. Such intermediate imaging system can be used both when the deflection element can be provided after the image-transmitting unit (claim 6) and at a Anord¬ voltage of the deflection system according to claim. 5

In any case, however, it is preferable if the or the deflection elements and if necessary the connected intermediate imaging system of the video camera and are removable jointly therewith from the endoscope. This ensures that whenever no video image is to be displayed, not exceed the size and weight of the endoscope, the Grö¬ SEN conventional endoscopes, and the brightness of the visual observed image is not reduced by the divider mirror.

But even then, when the insertable into the optical path deflecting element "not part of the video camera", it is preferable that the deflection element when not in use, ie whenever no video image is to be displayed, is removable from the beam path (claim 9), so that the image brightness is not reduced.

For the inventively provided second Einblicköff¬ voltage at which the video camera can be attached, there are a variety of possible arrangements: For example. the second viewing aperture can be integrated into the lateral connecting branch for the Beieuchtungslicht according to claim 10th The light-incident surface is annular ausgebil¬ det for the light of the illumination light source and surrounding the second viewing opening. This arrangement has the advantage that the construction of the endoscope is not we¬ changed sentlich, since in conventional Endos- Kopen to the connection port, an optical fiber cable is introduced ange¬, so that the operator is accustomed to the side on this side of an element the advantage of "projecting" the endoscope. In this case, it is preferable that the light exit surface of the light conductor cable surrounds the Bildaufneh¬ mer of insertable into the connection piece video camera, since it is then possible, reindeer auszufüh¬ the connecting cable for the video camera and the optical fiber cable as a unit.

but of course it is also possible that the zwei¬ te viewing opening is arranged leuchtungslicht next to the connection piece for the Be¬ (claim 16). This Aus¬ education has the advantage that any existing optical fiber cables and fiber optic connectors can be used already. It is preferred if the second viewing opening and the connection piece for the Beleuch¬ tung light combined to form a structural unit (claim 17).

Alternatively, the second viewing opening may also be positioned opposite the lateral connection stub for the illumination light (claim 12). Such a configuration improves if necessary, the weight distribution of the erfindungsgemä¬ SEN endoscope as compared with conventional endoscopes. - 1 -

Further, the second viewing opening may be arranged in a handle of claim 13, in which the Videoka¬ ra is inserted. In particular applications for technical or applicational at comparatively long endoscopes, it is particularly advantageous if a handle is provided for handling the endoscope. This handle, which is not usual in known endoscopes is given Erfin dung according to the additional function in that it additionally serves ra on handling of the endoscope also for receiving the Videoka¬.

In this case, it is preferable if the optical axis of the video camera with the optical axis of the image guide unit includes equal to 90 ° ein¬ according to claim 14 an angle, since then the handle can be ergonomically ge staltet.

A further possibility of arrangement of the second Ein¬ viewing opening characterized in claim 15 according to which the second viewing aperture is arranged parallel to the eyepiece insight. This embodiment has the advantage that the "lateral projection" of the video camera is so minimal as Lich mög¬, since usually the length dimensions are larger than the width dimensions.

Within the inventive basic idea is, of course, but not only possible one Umlenkele¬ ment in the observation beam path in front of the eyepiece ein¬ bring, but it is also possible to incorporate the image sensor of the video camera directly into the observation beam path in front of the eyepiece (claim 18). It is preferred if the image sensor directly in the plane Bild¬ the last image guide unit is disposed (An¬ demanding 20), wherein an additional optical element may be provided, if necessary, that the size of the image of the conductor unit Bild¬ the size of the imager without additional zu¬ intermediate image matches (claim 21).

This configuration has the advantage that usually completely or the like on a lens. can be dispensed with for the video camera. The imager of the video camera can be implemented on a guide which may be formed, for example, in the manner of a re volver-changer can be arranged, by means of which it herausbeweg¬ from the optical path is laterally bar so that a simple switching between direct observation via the eyepiece and video presentation is possible (claim 19).

The invention will now be described by way of example without restricting the all¬ common inventive concept based on embodiments with reference to the drawing, all not explained in detail in the text details of the invention reference is expressly made with respect to the rest of the disclosure. Show it:

Fig. 1 shows a first embodiment of the invention having a laterally mounted video camera,

FIGS. 2a and 2b variants of a second exemplary embodiment of the invention with a game are arranged on the side of the light guide connecting piece Video¬ camera,

Fig. 3 shows a third embodiment of the invention with a parallel to the optical axis disposed video camera,

Fig. 4 shows a fourth embodiment of the invention, wherein the video camera and the reflecting mirror are combined into a structural unit,

FIGS. 5a and 5b show a fifth embodiment of the invention, in which the video camera can be pushed into a handle, game in two positions, Fig. 6a to 6c variants of a sixth exemplary embodiment of the invention, wherein the deflecting element is integrated in a rod lens and 6d Fig. ents increased the formation of the Umlenkele.

In the following description to like or functionally identical parts the same reference numerals, so that ren in the description of the individual Figu¬ omitted renewed introduction of these parts and only the features will be described.

In particular, only the distal end portion is represented by the endoscope 10 in a rule. The endoscope 10 includes an eyepiece for viewing of the image 1 of a partially illustrated image guide unit 2 which passes the image of a non-illustrated endoscope lens to the proximal end. Further, a connecting piece 3 is provided, the illumination unit introducing the light of a Be¬ not shown in an illustrated only partially light guide 4 allows the guides the light of this light source to the distal end. Typically, the conductor surrounds Licht¬ the image guide unit at least partially. 5 is also the housing or the wall of the endoscope, respectively.

In the illustrated embodiments, the Licht¬ manager called. Rod lens systems 2 ', as they are typically used in hard or rigid endoscopes. But of course it is also possible to use other Licht¬ conductors, such as fiber bundle or the like. to use. With the video camera 20 is designated, which has a Bildauf¬ participants 11 and a lens 12th Further, a deflection element, for example a mirror is designated 14, the deflecting at least a portion of the AbbildungsStrahlengang- intensity on the image sensor 11 of the video camera 20th

Fig. 1 shows a first embodiment of the Erfin dung, in which the video camera 20 clip to the endoscope 10 relative to the connecting piece 3 by means of a geeigne¬ th, flange or Anschlu߬ not shown side is attached. 13 The deflection element 14 is formed as a partially transparent mirror which is inserted between the rod lens elements 3, and directs a portion of the intensity on the image sensor 11 of the video camera 20 so that a simultaneous observation through the eyepiece 1 and the video image on a not-shown monitor possible is.

The "straightening" of the reverse image of the Video¬ camera 20 may be "electronically" or performed with a Bildaufricht¬ system, for example a Dove prism, which sets einge¬ between the deflection element 14 and the lens 12th

FIGS. 2a and 2b show variants of a second Ausfüh¬ approximately embodiment of the invention, in which the video camera 20 on the side of the light guide connecting piece is 3 angeord¬ net. In the illustrated in Fig. 2a variant of the connection piece for the video camera 20 is in the clip Anschlu߬ 3 is integrated for the light guide 4, which the Bild¬ aufnemher 11 and the lens 12 of the video camera surrounds konzen¬ symmetrical. In the illustrated in Fig. 2b variant, however, the connecting sleeve 13 is for the video camera 20 in addition to the connecting sleeve 3 for the optical fiber 4 angeord¬ net. In both variants, the connection cable 15 may be summarized for the video camera with the fiber optic cable that connects the endoscope 20 to an unillustrated illumination device into a single cable.

Otherwise, the two variants of the second embodiment correspond to the first embodiment. Insbe¬ sondere turn the mirror 14 may be formed as a partially transparent mirror, and the image erection elektro¬ cally or optically done.

Fig. 3 shows a third embodiment of the Erfin dung, in which the video camera 20 is arranged "in parallel" to the optical axis of the endoscope 10. The deflection of a portion of the intensity of the imaging light bundle takes place in this embodiment, again with a teil¬ mirror 14, to which a full mirror is arranged 15 nachge¬ so that a right reading image on the Bild¬ pickup 11 of the video camera is ready to 20th

The illustrated in Fig. 4 fourth embodiment corresponds in terms of its optical construction the drit¬ th embodiment, but the video camera 20 and the deflection or deflection mirror 14 are combined to form a structural unit, so that they can be removed as a whole from the observation beam path. is thus obtained always, if there is no video surveillance wishes ge, a brighter image, since no partially transparent mirror in the optical path for visual observation ver¬. FIGS. 5a and 5b show a fifth embodiment of the invention, wherein the video camera is inserted into a slot provided on the endoscope handle 10 6 20. The video camera is, in turn, with a deflection mirror 14 and combined with a further deflection mirror 15 to form a structural unit. Unlike the fourth embodiment, in this embodiment of the Bildaufneh¬ mer 11 of the video camera and the two mirrors in such a way ange¬ assigns ,, that, alternatively, the partially transparent mirror 14 or directly to the image recorder 11 with the upstream lens 12 in the optical path of the image guide moiety may be introduced. 2 Thus three modes of operation, in this exemplary embodiment are possible:

1. Pure Video observation with inserted into the beam path lens 12 and pickup 11, whereby a bright video image due to the unnecessary beam splitting results.

2. Simultaneous visual observation through the eyepiece and video observation 1 with inserted into the beam path splitting mirror fourteenth

3. Pure visual observation with a light image due to a lack of beam division by the eyepiece 1, wherein the video unit is at least as far ent removed from the handle 6 that neither expensive beam 14 nor the Bild¬ located pickup 18 in the optical path.

In Figs. 6a to 6c two variants of a sixth embodiment of the invention are shown in which the deflecting element is integrated in a rod lens 2 '. Figs. 6a and 6b show in (partially perspective) side view and plan view of a first variant in which the deflecting element is integrated in a rod lens 2 14. In the illustrated 'embodiment of the Bildaufneh¬ mer is 11, a Fra e-trans er-chip. It is of particular advantage that the relatively large chip can be easily accommodated in the thickened central portion of the endoscope.

FIG. 6c shows a second variant in which three image receiver 1 111-- - 1111-- vvoorrggeesseehheenn ssiinndd ,, tthhee jjeewweeiill, s record a color separation of a color video image.

Fig. 6d is a Möglich¬ shows in side view and plan view ness, by the use of two mirrors 14 and 15, a right reading image in the arrangement of the deflecting element 14 in a rod lens 2 to obtain.

The invention has been described in terms of exemplary embodiments. Within the general inventive concept, the verschie¬ densten embodiments are of course possible: It is possible to dispense gel completely, in a modification of the fifth embodiment to the Spie¬, and the video unit 20 and the corresponding connection ports 13 so aus¬ zugestalten the endoscope that the video unit can be used directly in the beam path tung Beobach¬ so that alterna¬ tive -ur visual observation or video observation is possible. Furthermore, the beam splitter 14 may be implemented as Voll¬ mirror.

Claims

P atentanspr ü che
1. endoscope having disposed at the distal end ene doskopobjektiv whose image passes an image-transmitting unit to the proximal end where it can be viewed by an eyepiece, and with a lighting device comprising a light guide, the light from a light source to the distal end conducts, and the image guide unit zu¬ least partially surrounds, and a lateral Anschlu߬ clip for the endoscope to the light source verbin¬ having Knitting optical fiber cable, characterized in that an element transition in the observation Strahlen¬ front of the eyepiece in such a manner can be introduced in that the observation beam is directed with respect to its transmission at least partly on at least one image sensor of a video camera.
2. An endoscope according to claim 1, characterized in that the element is a deflection element which deflects the observation beam to a second viewing opening, in which the video camera can be attached.
3. An endoscope according to claim 2, characterized in that the deflection element einge¬ in the beam path set is a partially transparent mirror.
4. An endoscope according to claim 2 or 3, characterized in that another deflector element is outside the beam path Beobachtungs¬ at least provided so that a right reading image on the zwei¬ th viewing opening is generated.
5. An endoscope according to one of claims 2 to 4, wherein the image guide unit consists of relay lens systems having rod lenses, characterized in that the deflection element which deflects the beam path onto the second viewing aperture is integrated in a rod lens.
6. An endoscope according to one of claims 2 to 4, characterized in that the deflection element which deflects the beam path onto the second viewing opening is arranged after the image-transmitting unit.
7. An endoscope according to one of claims 2 to 6, characterized in that an intermediate imaging system is provided for the second viewing opening, zwischenabbildet the image generated by the image guide unit.
8. An endoscope according to one of claims 2 to 7, characterized in that the deflecting elements or and optionally the associated intermediate imaging system of the video camera and removable together with the latter.
9. An endoscope according to one of claims 2 to 7, characterized in that the use is in the optical path deflecting element can be brought at ein¬ Not out of the beam path Strah¬ removable.
10. An endoscope according to one of claims 2 to 9, characterized in that the second viewing opening in the lateral connecting branch for the illumination light is integrated, and that the light-entry surface has an annular shape for the light from the illumination light source and the second Einblicköff surrounds ung.
11. An endoscope according to claim 10, characterized in that the light from ride surface of the fiber optic cable surrounding the image sensor of the clip in the Anschlu߬ insertable video camera.
12. An endoscope according to one of claims 2 to 9, characterized in that the second viewing opening opposite the lateral connection stub for the Beleuch¬ disposed tung light.
13. An endoscope according to any one of claims 2 to characterized in that the second viewing aperture is disposed in a handle, in which the video camera can be inserted.
14. An endoscope according to claim 13, characterized in that the optical axis of Video¬ camera with the optical axis of the image guide unit includes an angle # 90 °.
15. An endoscope according to one of claims 2 to 9, characterized in that the second viewing aperture is arranged parallel to the eyepiece insight.
16. An endoscope according to one of claims 2 to 9, characterized in that the second viewing aperture is arranged ange¬ next to the connection piece for the illumination light.
17. An endoscope according to claim 16, characterized in that the second viewing opening and the connection piece for the illumination light are combined to form a structural unit.
18. An endoscope according to claim 1, characterized in that the in the observation beam path Strah¬ insertable in front of the eyepiece member Bildauf¬ the participants of the video camera.
19. An endoscope according to claim 18, characterized in that the image sensor is arranged on a guide by means of which it can be moved laterally out of the beam path out.
20. The endoscope of claim 18 or 19, characterized in that the image sensor is arranged directly in the image plane of the final image guide unit.
21. An endoscope according to claim 20, characterized in that an additional optical element is provided which adjusts the size of the image of the image-transmitting unit to the size of the imager.
22. An endoscope according to any one of claims 1 to 21, characterized in that alternatively, a teildurchlässi¬ ges deflecting element or the image sensor of the video camera can be introduced into the observation beam path.
23. An endoscope according to one of claims 1 to 22, characterized in that three imagers are provided, the image record a color separation of a colored Video¬ respectively.
PCT/DE1990/000659 1989-08-28 1990-08-28 Endoscope with tv camera WO1991003201A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19893928421 DE3928421C2 (en) 1989-08-28 1989-08-28 Endoscope with a video camera
DEP3928421.2 1989-08-28

Publications (1)

Publication Number Publication Date
WO1991003201A1 true true WO1991003201A1 (en) 1991-03-21

Family

ID=6388046

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1990/000659 WO1991003201A1 (en) 1989-08-28 1990-08-28 Endoscope with tv camera

Country Status (4)

Country Link
EP (1) EP0489774A1 (en)
JP (1) JPH04507305A (en)
DE (1) DE3943712C2 (en)
WO (1) WO1991003201A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5379756A (en) * 1992-09-11 1995-01-10 Welch Allyn, Inc. Replaceable lens assembly for video laparoscope
US7099078B2 (en) 2002-06-18 2006-08-29 Keymed (Medical & Industrial) Limited Borescope with simultaneous video and direct viewing
DE102011008533A1 (en) * 2011-01-13 2012-07-19 Olympus Winter & Ibe Gmbh Ureteroscope for use in urology for endoscopic operation in ureter and renal pelvis, has video camera optically connected to lens and spaced from lens via image conductor, and optical window arranged in distal surface of shaft pipe

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EP0022220A2 (en) * 1979-07-05 1981-01-14 Olympus Optical Co., Ltd. Multiple viewing attachment for an endoscope
EP0087033A1 (en) * 1982-02-08 1983-08-31 Olympus Optical Co., Ltd. Connecting device for endoscope
US4413278A (en) * 1981-10-05 1983-11-01 Designs For Vision, Inc. Optical coupling apparatus for coupling an arthoscope to a camera
DE3337454A1 (en) * 1982-10-15 1984-04-19 Olympus Optical Co Control device for a flash light
EP0122537A1 (en) * 1983-04-11 1984-10-24 Sumitomo Electric Industries Limited Device for remote viewing
EP0316244A1 (en) * 1987-11-12 1989-05-17 Welch Allyn, Inc. Video equipped endoscope with needle probe

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Publication number Priority date Publication date Assignee Title
JPS6334729B2 (en) * 1981-07-09 1988-07-12 Olympus Optical Co

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0022220A2 (en) * 1979-07-05 1981-01-14 Olympus Optical Co., Ltd. Multiple viewing attachment for an endoscope
US4413278A (en) * 1981-10-05 1983-11-01 Designs For Vision, Inc. Optical coupling apparatus for coupling an arthoscope to a camera
EP0087033A1 (en) * 1982-02-08 1983-08-31 Olympus Optical Co., Ltd. Connecting device for endoscope
DE3337454A1 (en) * 1982-10-15 1984-04-19 Olympus Optical Co Control device for a flash light
EP0122537A1 (en) * 1983-04-11 1984-10-24 Sumitomo Electric Industries Limited Device for remote viewing
EP0316244A1 (en) * 1987-11-12 1989-05-17 Welch Allyn, Inc. Video equipped endoscope with needle probe

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5379756A (en) * 1992-09-11 1995-01-10 Welch Allyn, Inc. Replaceable lens assembly for video laparoscope
US7099078B2 (en) 2002-06-18 2006-08-29 Keymed (Medical & Industrial) Limited Borescope with simultaneous video and direct viewing
DE102011008533A1 (en) * 2011-01-13 2012-07-19 Olympus Winter & Ibe Gmbh Ureteroscope for use in urology for endoscopic operation in ureter and renal pelvis, has video camera optically connected to lens and spaced from lens via image conductor, and optical window arranged in distal surface of shaft pipe

Also Published As

Publication number Publication date Type
EP0489774A1 (en) 1992-06-17 application
JPH04507305A (en) 1992-12-17 application
DE3943712C2 (en) 1995-09-21 grant

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