DE102009009016A1 - Endoscope has system-pipe, in which image conductor and distal objective are stored, where objective has distal lens group and proximal lens group arranged in objective pipe - Google Patents
Endoscope has system-pipe, in which image conductor and distal objective are stored, where objective has distal lens group and proximal lens group arranged in objective pipe Download PDFInfo
- Publication number
- DE102009009016A1 DE102009009016A1 DE102009009016A DE102009009016A DE102009009016A1 DE 102009009016 A1 DE102009009016 A1 DE 102009009016A1 DE 102009009016 A DE102009009016 A DE 102009009016A DE 102009009016 A DE102009009016 A DE 102009009016A DE 102009009016 A1 DE102009009016 A1 DE 102009009016A1
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- Prior art keywords
- lens group
- objective
- distal
- proximal
- lens
- Prior art date
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Classifications
-
- 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
- A61B1/00188—Optical arrangements with focusing or zooming features
-
- 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
- A61B1/002—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 having rod-lens arrangements
-
- 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
- A61B1/307—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 for the urinary organs, e.g. urethroscopes, cystoscopes
-
- 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
- G02B23/243—Objectives for endoscopes
-
- 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
- G02B23/2476—Non-optical details, e.g. housings, mountings, supports
-
- 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
- A61B1/005—Flexible endoscopes
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Surgery (AREA)
- Optics & Photonics (AREA)
- Medical Informatics (AREA)
- Animal Behavior & Ethology (AREA)
- Radiology & Medical Imaging (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Biophysics (AREA)
- Molecular Biology (AREA)
- Pathology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Astronomy & Astrophysics (AREA)
- General Physics & Mathematics (AREA)
- Urology & Nephrology (AREA)
- Endoscopes (AREA)
- Lenses (AREA)
- Instruments For Viewing The Inside Of Hollow Bodies (AREA)
Abstract
Description
Die Erfindung betrifft ein Endoskop der im Oberbegriff des Anspruchs 1 genannten Art.The The invention relates to an endoscope in the preamble of claim 1 mentioned type.
Gattungsgemäße Endoskope, die in der Technik und hauptsächlich in der Chirurgie verwendet werden, bilden mit einem distal angeordneten Objektiv ein Zwischenbild auf den Eingang eines Bildleiters ab, der das Bild dann weiter bis zu einer proximal vorgesehenen Beobachtungseinrichtung überträgt. Der Bildleiter kann das Bild mit einer Videokamera aufnehmen und elektronisch weitertransportieren, kann jedoch auch aus einem Bildleiterfaserbündel bestehen, auf dessen distaler Stirnfläche das Bild vom Objektiv abgebildet wird. Insbesondere bei sehr engen Durchmessern von wenigen Millimeter werden jedoch Relaislinsensysteme mit Stablinsen bevorzugt, die auch dann noch eine hohe Bildauflösung gewährleisten können.Generic endoscopes, those in engineering and mainly used in surgery, make with a distally located lens an intermediate image on the entrance of an image guide from the image then continues to a proximally provided observation device transmits. Of the Bildleiter can take the picture with a video camera and electronically transport, but can also consist of a Bildleiterfaserbündel, on its distal end face the Picture of the lens is imaged. Especially with very narrow diameters of a few millimeters, however, relay lens systems with rod lenses preferred, which can still guarantee a high image resolution.
Gattungsgemäße Objektive weisen zwei Linsengruppen auf, die jeweils aus verkitteten Linsen bestehen. Bei bekannten Objektiven dieser Art, sind beide Lin sengruppen im Objektivrohr angeordnet, das seinerseits im Systemrohr gelagert ist, welches auch den Bildleiter, z. B. in Form von Relaislinsen, enthält.Generic lenses have two lens groups, each consisting of cemented lenses. In known lenses of this type, both Lin are sen groups in Lens tube arranged, which in turn stored in the system pipe which is also the image guide, z. B. in the form of relay lenses contains.
Dabei entstehen Platzprobleme. Der Außendurchmesser eines Endoskopes ist durch die Anwendungsgegebenheiten beschränkt. Soll das Endoskop z. B. zur Einführung in einen Ureter, der von der menschlichen Blase zur Niere führt, geeignet sein, so darf sein Außendurchmesser nur wenige Millimeter betragen. Im Querschnitt des Endoskopes, von außen nach innen gesehen, ist dabei üblicherweise ein Außenrohr vorgesehen, danach ein zur Objektbeleuchtung dienendes Lichtleitfaserbündel, sodann ein die Lichtleitfasern nach innen begrenzendes Faserrohr. Dann kommt erst das Systemrohr und darin das Objektivrohr, in dem die Objektivlinsen angeordnet sind. Man sieht, dass unter diesen Verhältnissen die Objektivlinsen nur noch sehr kleine Durchmesser haben können. Es kommt dabei zu starker Vignettierung (Randabschattung) der Bilder, die nur schwer zu bekämpfen ist.there space problems arise. The outer diameter an endoscope is limited by the application conditions. Should the endoscope z. B. for introduction into an ureter that leads from the human bladder to the kidney his outer diameter may be only a few millimeters. In the cross section of the endoscope, from Outside inside, it's common an outer tube provided, thereafter serving for object lighting optical fiber bundle, then a the fibers inward limiting fiber tube. Then comes first the system tube and inside the lens tube, in which the objective lenses are arranged. It can be seen that under these conditions the Objective lenses can only have very small diameters. It comes to strong vignetting (edge shading) of the images, difficult to fight is.
Die Aufgabe der vorliegenden Erfindung besteht darin, bei einem gattungsgemäßen Endoskop die Vignettierung zu verringern.The Object of the present invention is in a generic endoscope the To reduce vignetting.
Diese Aufgabe wird mit den Merkmalen des Kennzeichnungsteiles des Anspruchs 1 gelöst.These Task is with the features of the characterizing part of the claim 1 solved.
Erfindungsgemäß wird die proximale Linsengruppe außerhalb des Objektivrohres, unmittelbar im Systemrohr, angeordnet. Dadurch läßt sich der Durchmesser dieser Linsen um die doppelte Dicke des Objektivrohres vergrößern. Vignettierung entsteht durch die Behinderung von Randstrahlen des im Objektiv verlaufenden Strahlenganges. Bei dem Objektiv des gattungsgemässen Endoskopes entsteht Vignettierung insbesondere in der proximalen Linsengruppe. Wird deren Durchmesser vergrössert, ergibt sich somit eine erhebliche Verringerung der Vignettierung. Der Vorteil ist besonders groß bei Endoskopen mit sehr kleinem Durchmesser, bei denen folglich auch die Objektivlinsen sehr geringe Durchmesser haben.According to the invention proximal lens group outside of the objective tube, arranged directly in the system tube. Thereby let yourself the diameter of these lenses by twice the thickness of the objective tube enlarge. Vignette is caused by the obstruction of marginal rays of the lens extending beam path. In the lens of the generic endoscope Vignetting occurs especially in the proximal lens group. If the diameter is increased, this results Thus, a significant reduction in vignetting. The advantage is especially big at Endoscopes with very small diameter, which consequently also the objective lenses have very small diameters.
Wenn erfindungsgemäß die proximale Linsengruppe nicht mehr im Objektivrohr liegt, müsste dieses nur noch die distale Linsengruppe aufnehmen und könnte dieser in der Länge angepasst sein. Es müsste nicht bis zur proximalen Linsengruppe reichen, die aus optischen Gründen in einem Abstand zur distalen Linsengruppe liegt. Dann wäre das Objektivrohr relativ kurz und könnte bei Fertigungsungenauigkeiten, aufgrund des Spiels gegenüber dem Systemrohr bei Stoßbeanspruchung kippen, was zu Bildstörungen führt. Vorteilhaft sind daher die Merkmale des Anspruchs 2 vorgesehen. Das Objektivrohr wird über den Abstand zwischen den Linsengruppen hinweg soweit wie möglich, also bis zur proximalen Linsengruppe verlängert. Durch diese Verlängerung wird die Kippgefahr verringert. Durch das Kippen entstehende Bildstörungen werden beseitigt oder stark verringert.If According to the invention, the proximal Lens group is no longer in the objective tube, this would have only the distal Record lens group and could this one in length be adjusted. It should do not reach to the proximal lens group, the optical establish is at a distance to the distal lens group. Then the lens tube would be relatively short and could in manufacturing inaccuracies, due to the game against the system pipe at impact load tilt, causing image interference leads. Advantageously, therefore, the features of claim 2 are provided. The objective tube is over the distance between the lens groups as far as possible, so extended to the proximal lens group. This extension will reduces the risk of tipping. Become the tilting resulting image noise eliminated or greatly reduced.
Das Objektivrohr kann von durchgehend gleichmäßiger Wandstärke sein. An seinem proximalen Ende würde es dann abblendend wirken und könnte zu Vignettierungen führen. Vorteilhaft sind daher die Merkmale des Anspruchs 3 vorgesehen. Im Bereich unmittelbar vor dem distalen Ende der proximalen Linsengruppe, wo bereits mit Vignettierung zu rechnen ist, wird dadurch ein größerer Innendurchmesser des Objektivrohres geschaffen, wodurch an dieser Stelle auftretende Vignettierungen beseitigt werden.The Lens tube can be of consistently uniform wall thickness. At its proximal end would then it can and should be dimming lead to vignetting. Advantageously, therefore, the features of claim 3 are provided. In the area immediately before the distal end of the proximal lens group, where vignetting is already to be expected, this will result in a larger inner diameter created the objective tube, which occurs at this point Vignetting be eliminated.
Wie bereits erwähnt, kann der Bildleiter auf unterschiedliche Weise ausgebildet sein, z. B. als Bildleitfaserbündel oder als Videosystem. Vorteilhaft ist er jedoch gemäß Anspruch 4 als Relaislinsensystem ausgebildet, das – insbesondere bei kleinen Durchmessern des Bildleiters – Vorteile, vor allem hinsichtlich der Bildauflösung, bietet.As already mentioned, the image guide can be designed in different ways, z. B. as Bildleitfaserbündel or as a video system. However, it is advantageous according to the claim 4 designed as a relay lens system, which - especially for small diameters of the picture leader - advantages, especially with regard to image resolution.
In
der Zeichnung ist die Erfindung beispielsweise und schematisch in
einer einzigen
Im
Faserrohr
Das
durch das Fenster
Es
ist ein Objektivrohr
Die
proximale Linsengruppe
Die
proximale Linsengruppe
Dieses
Problem tritt besonders bei sehr dünnen Endoskopen auf. Wenn das
dargestellte Endoskop
Das
Objektivrohr müsste
nur die Linse
Das
Objektivrohr
Anstelle,
wie in
Wenn,
wie in
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009009016A DE102009009016A1 (en) | 2009-02-16 | 2009-02-16 | Endoscope has system-pipe, in which image conductor and distal objective are stored, where objective has distal lens group and proximal lens group arranged in objective pipe |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009009016A DE102009009016A1 (en) | 2009-02-16 | 2009-02-16 | Endoscope has system-pipe, in which image conductor and distal objective are stored, where objective has distal lens group and proximal lens group arranged in objective pipe |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102009009016A1 true DE102009009016A1 (en) | 2010-08-19 |
Family
ID=42338722
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102009009016A Withdrawn DE102009009016A1 (en) | 2009-02-16 | 2009-02-16 | Endoscope has system-pipe, in which image conductor and distal objective are stored, where objective has distal lens group and proximal lens group arranged in objective pipe |
Country Status (1)
Country | Link |
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DE (1) | DE102009009016A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11314076B2 (en) * | 2017-04-07 | 2022-04-26 | Olympus Corporation | Rigid scope |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3921233A1 (en) * | 1989-06-28 | 1991-02-14 | Storz Karl Gmbh & Co | ENDOSCOPE WITH A VIDEO DEVICE AT THE DISTAL END |
DE19723442A1 (en) * | 1996-07-29 | 1998-02-05 | Storz Karl Gmbh & Co | Endoscope with at least one registration device |
JPH11253385A (en) * | 1998-03-10 | 1999-09-21 | Olympus Optical Co Ltd | Endoscope |
JP2000037343A (en) * | 1998-07-24 | 2000-02-08 | Olympus Optical Co Ltd | Endoscope system |
EP1000374B1 (en) * | 1997-08-22 | 2003-03-26 | Karl Storz GmbH & Co. KG | Endoscopic lens |
-
2009
- 2009-02-16 DE DE102009009016A patent/DE102009009016A1/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3921233A1 (en) * | 1989-06-28 | 1991-02-14 | Storz Karl Gmbh & Co | ENDOSCOPE WITH A VIDEO DEVICE AT THE DISTAL END |
DE19723442A1 (en) * | 1996-07-29 | 1998-02-05 | Storz Karl Gmbh & Co | Endoscope with at least one registration device |
EP1000374B1 (en) * | 1997-08-22 | 2003-03-26 | Karl Storz GmbH & Co. KG | Endoscopic lens |
JPH11253385A (en) * | 1998-03-10 | 1999-09-21 | Olympus Optical Co Ltd | Endoscope |
JP2000037343A (en) * | 1998-07-24 | 2000-02-08 | Olympus Optical Co Ltd | Endoscope system |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11314076B2 (en) * | 2017-04-07 | 2022-04-26 | Olympus Corporation | Rigid scope |
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OP8 | Request for examination as to paragraph 44 patent law | ||
8130 | Withdrawal |