EP3254148A2 - Endoscope - Google Patents

Endoscope

Info

Publication number
EP3254148A2
EP3254148A2 EP16703911.4A EP16703911A EP3254148A2 EP 3254148 A2 EP3254148 A2 EP 3254148A2 EP 16703911 A EP16703911 A EP 16703911A EP 3254148 A2 EP3254148 A2 EP 3254148A2
Authority
EP
European Patent Office
Prior art keywords
shaft
fiber tube
prism assembly
section
cross
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.)
Withdrawn
Application number
EP16703911.4A
Other languages
German (de)
English (en)
Inventor
Martin Wieters
Regina ORZEKOWSKY-SCHROEDER
Annika Göhring
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Olympus Winter and Ibe GmbH
Original Assignee
Olympus Winter and Ibe GmbH
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
Application filed by Olympus Winter and Ibe GmbH filed Critical Olympus Winter and Ibe GmbH
Publication of EP3254148A2 publication Critical patent/EP3254148A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G02B23/24—Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes
    • G02B23/2407—Optical details
    • G02B23/2423—Optical details of the distal end
    • 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
    • A61B1/00064—Constructional details of the endoscope body
    • A61B1/00071—Insertion part of the endoscope body
    • A61B1/0008—Insertion part of the endoscope body characterised by distal tip features
    • A61B1/00096—Optical elements
    • 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
    • A61B1/00163—Optical arrangements
    • A61B1/00174—Optical arrangements characterised by the viewing angles
    • A61B1/00179—Optical arrangements characterised by the viewing angles for off-axis viewing
    • 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
    • A61B1/044—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 for absorption imaging

Definitions

  • the invention relates to an endoscope having the features of claim 1.
  • endoscopes serve to observe the interior of cavities of a body, which are typically accessible only through small access openings.
  • a shaft of the endoscope is inserted through the opening into the cavity.
  • the endoscope described here can be both lens endoscopes and video endoscopes.
  • an image sensor of the shaft provides an image capture behind a lens to produce video camera images.
  • the optical components are typically located at the distal, inserted end of the shaft. They are usually arranged inside a fiber tube, which is surrounded by a cladding tube or outer tube. A transport lens system brings the image function to the eyepiece. The image data of a video endoscope can then be transported to an external display device and displayed accordingly.
  • a prism assembly for deflecting the beam path is provided.
  • a disadvantage of the known endoscopes is that the size and space requirement of the prism assembly in the transverse direction to the shaft are relatively large. This results from the fact that the prism assembly in the prior art has a large cross-section to allow a sufficient image quality.
  • Object of the present invention is therefore to provide an endoscope that allows smaller transverse dimensions or cross sections of the prism assembly.
  • the prism assembly is arranged eccentrically to the lens, so in particular not centered or centered.
  • the prism assembly is aligned centric to the lens. Due to the beam path, however, this is according to the invention straight, not required. Instead, a reduced in cross-section contrast the design of the prism assembly is used. This therefore has smaller cross-sectional dimensions.
  • the cross section of the prism assembly can be reduced.
  • the prism assembly is preferably arranged eccentrically to the cross section of the shaft or the fiber tube.
  • the cross-section of the prism assembly can be downsized compared to the prior art.
  • the cross-section of the fiber tube can be maintained or reduced at the same time. This ensures that free space is created in the area between the prism assembly and the shaft or fiber tube or that the cross-sectional dimensions of the fiber tube are likewise reduced.
  • the lens and / or optionally the image pickup unit is further preferably arranged eccentrically to the cross section of the shaft or the fiber tube. Accordingly, free space can arise between the objective or the image recording unit and the fiber tube or the shaft.
  • the distance between the fiber tube and the prismatic assembly is preferably only present on one side or larger on one side than on the opposite side. Thus, space is created in the area between prismatic assembly and fiber tube or shaft in the respective interior. More preferably, the outer cross section of the prism assembly is smaller than the inner cross section of the shaft or the fiber tube. Because the prism assembly does not occupy the entire cross-section of the shaft or fiber tube, clearance is created in the intermediate region. An eccentric arrangement of the optical components, such as the prism assembly, the image pickup unit or the lens, is thus made possible.
  • the cross section of the prism assembly is perpendicular to the longitudinal direction of the endoscope smaller than the inner cross section of the fiber tube or the shaft.
  • a cavity in the shaft preferably in the region between the prismatic assembly and the inner wall of the fiber tube is provided.
  • this is a crescent-shaped cavity.
  • At least one component is arranged between prismatic assembly and inner wall of the shaft or of the fiber tube, in particular in the cavity.
  • it is an electrical and / or electronic component.
  • various elements may be provided, for example active and / or passive components. These may preferably be measuring devices, measuring probes or the like. It may also be preferred to provide special mechanical components.
  • At least one heating element is arranged between the prismatic assembly and the inner wall of the shaft or the fiber tube, in particular in the cavity.
  • it can also be a cooling element.
  • a heating foil and / or at least one heating wire is used.
  • a Peltier element or the like may be provided. Heating elements are used in particular to prevent fogging of the optical components by condensing water.
  • a suitable temperature in particular by heating is required.
  • at least one temperature sensor is arranged between the prismatic assembly and the inner wall of the shaft or of the fiber tube, in particular in the cavity.
  • the temperature sensor is preferably a thermistor.
  • a temperature sensor can be used to determine the current temperature. In particular, it serves to carry out temperature measurements and / or tempering, and / or to prevent overheating, for example in the case of heating, in particular by means of a heating element.
  • the prism assembly has a plurality of prisms. Preferably, at least two prisms are assembled to the prism assembly. This is a Umienkung the beam path allows.
  • the prism assembly is designed in particular for rotation and / or tilting or generally for reversing the beam path.
  • FIG. 1 shows a longitudinal section of a shaft of a video endoscope according to the prior art
  • FIG. 2 shows a longitudinal section of a shaft of a video endoscope according to the invention according to a first exemplary embodiment
  • FIG. 3 shows a longitudinal section of a shaft of a video endoscope according to the invention according to a second exemplary embodiment
  • FIG. 4 is a schematic diagram of the beam path in a video endoscope according to the prior art of Fig. 1,
  • FIG. 5 is a schematic representation of a beam path of a video endoscope according to the invention according to the embodiment of FIG. 2, and a schematic representation of a beam path of a video endoscope according to the invention according to the embodiment of FIG .. 3
  • the representation of Fig. 1 shows a sketch of a known from the prior art video endoscope 10 in longitudinal section. In this case, however, only one fiber tube 11 is shown, which contains the essential optical components. This fiber tube 11 is provided for insertion into an outer tube or cladding tube 12 shown here in broken lines only. The area between cladding tube 12 and fiber tube 11 serves, for example, for receiving optical fibers (not shown here) for illuminating the observation area or field of view.
  • the cladding tube 12 and the fiber tube 11 with the optical components arranged in the interior of the fiber tube 11 form the shaft 13.
  • the latter is used for insertion into an opening to a cavity of a body to be observed, preferably for the field of endoscopic surgery.
  • a lens 15 and an image pickup unit 16 are arranged as optical components.
  • the objective 15 serves to image the area or field of view to be observed on the image recording unit 16.
  • the image recording unit 16 it is possible in particular to use an image sensor or video sensor, for example a CCD sensor or a CMOS sensor.
  • the lens 15 provides for a corresponding optical image on a photosensitive region of the image pickup unit 16.
  • An evaluation electronics not shown here, is usually arranged outside of the endoscope 10 and connected to the video endoscope 10 by means of a cable connection, also not shown.
  • the video endoscopes 10 considered here are so-called "biased-looking video endoscopes". This means that the observation direction is not aligned in the direction of the longitudinal axis of the video endoscope 10 but at an angle to the longitudinal extent of the video endoscope 10 or its shaft 13.
  • the objective 15 and the image recording unit 16 are already parallel to the longitudinal axis of the video endoscope 10 for reasons of space with their optical axis or the shaft 13 aligned with the fiber tube 11 or cladding tube 12. This basically ensures as compact a linear construction as possible in order to simultaneously minimize the cross-sectional dimensions of the video endoscope 10.
  • the area to be observed is not in the direction of the longitudinal axis, but obliquely thereto and off the axis.
  • a prism assembly 14 is required.
  • the prism assembly 14 typically typically includes two interconnected individual prisms 17 and 18.
  • the two prisms 17 and 18 are joined together at a junction 19, typically by gluing.
  • This splice will be carried out by means of an optical adhesive for adjusting the refractive indices at the junction 19.
  • sufficient reflection at the connection point of the prisms 17 and 18 is thus made possible.
  • the video endoscope 10 of FIG. 1 shows that the lower region of the prism assembly 14 contributes only slightly to the image pickup unit 16 for optical imaging. Namely, the beam path 20 extends substantially in the upper region of the prism assembly 14 in the illustrations. Accordingly, the lower portion of the prism assembly 14 is not practically critical to the optical quality of the image.
  • the video endoscope 10 according to the invention of FIG. 2 takes this fact into account.
  • the prism assembly 14 is compared to the known video endoscope 10 of FIG. 1 reduced in diameter or cross section and formed axially offset.
  • the bottom wall of the fiber tube 11 is accordingly spaced from the bottom edge of the prism assembly 14. For this was. 'reduces the transverse dimension of the prism assembly 14 in the vertical direction of the plane of the drawing relative to the diameter D 0 of the fiber tube 11.
  • This cavity 22 may remain free or different components can be arranged therein.
  • a measuring device such as a thermistor or the like may be used.
  • the prism assembly 14 is thus aligned eccentrically to the fiber tube 1 1 in this case. Since the beam path focuses, as before centric to the fiber tube 1 1, the lens 15 is aligned with the image pickup unit 16 and the surrounding objective tube as in the prior art centric to the fiber tube 1 1. The beam path 20 accordingly runs substantially centrally to the fiber tube 1 1. Only the prism assembly 14 is thus arranged eccentrically or decentrally, that is, with the optical axis corresponding to the beam path but with its cross section decentered thereto. In the second embodiment of the invention according to FIG. 3, a prism assembly 14, which has been reduced in diameter or cross-section, has likewise been used.
  • the prism assembly 14 is aligned centrally with the fiber tube 11.
  • the lens 15 with the image pickup unit 16 with the surrounding system tube 23 decentered to the fiber tube 1 1 aligned. This ensures that the beam path can enter centrally into the objective 15 and the image recording unit 16.
  • prism assembly 14 and lens 15 are aligned eccentrically to each other.
  • FIGS. 4 to 6 show corresponding beam paths 20 with sketched cross sections 24 of the respective prism subassembly 14 in frontal view according to FIGS. 1 to 3.
  • FIG. 4 shows a known video endoscope 10, in which the prism assembly 14 is aligned in a manner typically centric to the fiber tube 11. The beam path 20 therefore runs concentrically with respect to the fiber tube 11. Thus, a corresponding image can be produced on the image acquisition unit 16 by the objective 15, which corresponds to the cross section of the prism assembly 14 in FIG Essentially corresponds.
  • a reduced in cross section 24 prism assembly 14 is provided.
  • the prism assembly 14 has a cross-section which is smaller than the cross-section of the fiber tube 24 shown here by dashed lines.
  • the prism assembly 14 is arranged in this case in the upper region of the fiber tube 11. Consequently, a cavity 22 is created in the lower area for the installation of additional components.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Surgery (AREA)
  • Optics & Photonics (AREA)
  • Biomedical Technology (AREA)
  • Animal Behavior & Ethology (AREA)
  • Radiology & Medical Imaging (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Engineering & Computer Science (AREA)
  • Biophysics (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Pathology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Instruments For Viewing The Inside Of Hollow Bodies (AREA)
  • Endoscopes (AREA)

Abstract

L'invention concerne un endoscope, par exemple un vidéo-endoscope (10), dont la direction de visée est oblique par rapport à son axe longitudinal. Cet endoscope présente une tige (13) comportant une gaine tubulaire (12) et, à l'intérieur, un tube à fibres (11), un objectif (15) comportant une unité d'acquisition d'images (16) étant agencé dans la tige (13), notamment dans le tube à fibres (14). Un module prisme (14) sert à dévier la trajectoire du faisceau. Cet endoscope est caractérisé par un module prisme (14) agencé de manière excentrique par rapport à l'objectif (15).
EP16703911.4A 2015-02-04 2016-01-28 Endoscope Withdrawn EP3254148A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015101624.9A DE102015101624A1 (de) 2015-02-04 2015-02-04 Endoskop
PCT/EP2016/000142 WO2016124319A2 (fr) 2015-02-04 2016-01-28 Endoscope

Publications (1)

Publication Number Publication Date
EP3254148A2 true EP3254148A2 (fr) 2017-12-13

Family

ID=55349777

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16703911.4A Withdrawn EP3254148A2 (fr) 2015-02-04 2016-01-28 Endoscope

Country Status (5)

Country Link
US (1) US10481384B2 (fr)
EP (1) EP3254148A2 (fr)
JP (1) JP6472887B2 (fr)
DE (1) DE102015101624A1 (fr)
WO (1) WO2016124319A2 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016202093A1 (de) * 2016-02-11 2017-08-17 Olympus Winter & Ibe Gmbh Videoendoskop
DE102017124593A1 (de) * 2017-10-20 2019-04-25 Olympus Winter & Ibe Gmbh Umlenkprismenbaugruppe für ein Endoskop mit seitlicher Blickrichtung, Endoskop und Verfahren zur Montage einer Umlenkprismenbaugruppe
DE102018115238B4 (de) * 2018-06-25 2021-09-23 Olympus Winter & Ibe Gmbh Umlenkprismenbaugruppe für ein Endoskop mit seitlicher Blickrichtung, Endoskop mit seitlicher Blickrichtung und Verfahren zur Montage einer Umlenkprismenbaugruppe

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4697577A (en) * 1986-05-22 1987-10-06 Baxter Travenol Laboratories, Inc. Scanning microtelescope for surgical applications
JPH0184602U (fr) 1987-11-26 1989-06-06
JPH0511196A (ja) * 1991-07-08 1993-01-19 Olympus Optical Co Ltd 内視鏡用視野方向変換光学系
DE4211547C2 (de) * 1992-04-06 1994-08-11 Henke Sass Wolf Gmbh Schutzabdeckung für das distale Ende von Endoskopen
JP3434564B2 (ja) * 1994-04-11 2003-08-11 オリンパス光学工業株式会社 内視鏡
JPH09288240A (ja) 1996-04-19 1997-11-04 Olympus Optical Co Ltd 内視鏡用視野方向変換光学系
JPH1090603A (ja) 1996-09-18 1998-04-10 Olympus Optical Co Ltd 内視鏡光学系
JPH10123411A (ja) 1996-10-24 1998-05-15 Olympus Optical Co Ltd ファイバースコープ光学系
DE19822167B4 (de) 1998-05-16 2005-10-13 Olympus Winter & Ibe Gmbh Endoskop
DE19929045C1 (de) 1999-06-25 2001-03-15 Storz Karl Gmbh & Co Kg Ablenksystem für ein Schrägblickendoskop sowie Schrägblickendoskop mit einem derartigen Ablenksystem
DE102008031924B4 (de) * 2008-07-08 2019-06-13 Olympus Winter & Ibe Gmbh Endoskop mit Widerstandsheizung
DE102009020262A1 (de) * 2009-05-07 2010-11-11 Olympus Winter & Ibe Gmbh Objektiv mit zwei Blickrichtungen für ein Endoskop
DE202010017255U1 (de) 2010-03-15 2011-05-26 Karl Storz GmbH & Co. KG, 78532 Endoskopisches Instrument mit einer Heizung für das Abschlussfenster
JP5272053B2 (ja) * 2011-07-26 2013-08-28 富士フイルム株式会社 電子内視鏡装置及び電子内視鏡システム
EP2716204B1 (fr) * 2011-12-07 2018-12-12 Olympus Corporation Endoscope électronique
DE102012021614A1 (de) 2012-11-06 2014-05-08 Olympus Winter & Ibe Gmbh Medizinisches Endoskop
DE102012110905A1 (de) * 2012-11-13 2014-05-15 Karl Storz Gmbh & Co. Kg Beobachtungsinstrument mit einem hochauflösenden Bildaufnehmer
JP2014131531A (ja) * 2013-01-04 2014-07-17 Olympus Medical Systems Corp 内視鏡の曇り防止システムと内視鏡の曇り防止方法
EP2915477A4 (fr) * 2013-09-25 2016-06-29 Olympus Corp Unité électrique et endoscope en étant doté
DE102014209980B4 (de) * 2014-05-26 2021-06-17 Olympus Winter & Ibe Gmbh Videoendoskop

Also Published As

Publication number Publication date
JP6472887B2 (ja) 2019-02-20
DE102015101624A1 (de) 2016-08-04
US10481384B2 (en) 2019-11-19
WO2016124319A2 (fr) 2016-08-11
US20180024348A1 (en) 2018-01-25
WO2016124319A3 (fr) 2016-09-29
JP2018505731A (ja) 2018-03-01

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