DD237723B1

DD237723B1 - ADJUSTMENT DEVICE FOR AN ENDOSCOPIC

Info

Publication number: DD237723B1
Application number: DD26043284A
Authority: DD
Inventors: Dieter Heinze; Juergen Rank
Original assignee: Berlin Med Geraete
Priority date: 1984-02-29
Filing date: 1984-02-29
Publication date: 1990-10-10
Also published as: DD237723A1

Description

Hierzu 1 Seite ZeichnungFor this 1 page drawing

Field of application of the invention

Die Justiervorrichtung für ein Endoskopokular findet insbesondere Anwendung als medizinisches Instrument zur Inspektion menschlicher Körperhöhlen.The adjustment device for an endoscopic eyepiece finds particular application as a medical instrument for the inspection of human body cavities.

Characteristic of the known technical solutions The image transmission in an endoscope optical system takes place in particular via the object, the rod lens system and the eyepiece

zum Auge des Betrachters.to the eye of the beholder.

The position of the actual optical axes of the optical components to the theoretical optical axis, by the

aneinandergereihten optischen Bauelemente gebildet wird, bestimmt dabei die Größe der Abbildungsfehler der optischenformed juxtaposed optical components, thereby determines the size of the aberrations of the optical

Figure authoritative with. Furthermore, the deviation determines the real position of the optical components of their

theoretischer Ideallage auch die Abweichung der realen Blickrichtung von der theoretisch errechneten.theoretical ideal also the deviation of the real direction of view from the theoretically calculated.

Consequently, the result of the requirement for minimal viewing direction tolerances and aberrations poor in imaging

höchste Ansprüche an die Maßhaltigkeit der optischen und mechanischen Bauteile einer Endoskopoptik.highest demands on the dimensional accuracy of the optical and mechanical components of an endoscope optic.

To solve the partial problem of the axial alignment of eyepiece and image guide system, it is known by means of radial Eyepiece locking screws allow eyepiece alignment (EP 0066374). Another known solution to the problem of bringing the axis of the eyepiece and attached camera

läßt in ähnlicher Weise wie bereits erwähnt eine gewisse radiale Ausrichtung des Okulars zum vorangehenden Bildleitsystem zuAllows a certain radial alignment of the eyepiece to the preceding image guidance system in a similar manner as already mentioned

Finally, it is known, an adjustable coupling for optical components of two nested sockets to

realisieren, wobei jede Längsbohrung der Buchsen exzentrisch angeordnet ist (DE 2358785).realize, each longitudinal bore of the bushes is arranged eccentrically (DE 2358785).

The known solutions allow only a certain Okularjustierung in the radial direction. The latter variant is unfavorable in terms of manufacturing technology and the adjustment process requires complicated manipulation

mit beiden Buchsen, da Betrag und Richtung nicht direkt einstellbar sind. Neben diesen Mängeln besteht ein weiterer Nachteil darin, daß eine zusätzliche Okularjustierung in axialer Richtung nicht bekannt ist, was insgesamt zu Abweichungen vonwith both sockets, since amount and direction are not directly adjustable. In addition to these deficiencies, another disadvantage is that an additional eyepiece adjustment in the axial direction is not known, resulting in an overall deviation from

theoretischer und realer Bildlage führt.theoretical and real picture position leads.

Larger deviations appear as image trimmings or images with extreme aberrations. These must be determined by suitable choice of the tolerances of the components of the lens and image guide system or the mechanical Dimensions of the optical components and the socket elements are kept low. The remaining residual errors are expressed in deviations from the viewing direction and shadowing of the image.

insbesondere im Zusammenhang mit fest an die Endoskopoptik gekoppelten Instrumenten, wie Schneideschlingen oderespecially in connection with fixedly coupled to the endoscope optics instruments, such as cutting loops or

Probe excision forceps this is very disadvantageous. Object of the invention

Das Ziel der Erfindung besteht darin, eine verbesserte Endoskopoptik mit verstellbarem Okular vorzuschlagen, deren Gebrauchseigenschaften-Verbesserungen insbesondere in der Verringerung von Blickrichtungstoleranzen und der Vermeidung von Bildabschneidungen besteht.The object of the invention is to propose an improved endoscopic optic with adjustable eyepiece, whose performance improvements consist in particular in the reduction of viewing direction tolerances and the avoidance of image trimming.

Ein weiteres Ziel der Erfindung besteht darin, die Herstellung, Montage und Justage des Okulars fertigungsgünstig und unkompliziert zu ermöglichen.Another object of the invention is to make production, installation and adjustment of the eyepiece production-favorable and uncomplicated.

Explanation of the essence of the invention

Es ist Aufgabe der Erfindung, gegenüber dem ortsfesten Bildleitsystem einer Endoskopoptik ein Okular in drei Freiheitsgraden justierbar zu gestalten.It is an object of the invention to make an eyepiece adjustable in three degrees of freedom relative to the fixed image guidance system of an endoscope optics.

Erfindungsgemäß wird die Aufgabe dadurch gelöst, daß eine zylindrische Okularhülse proximalseitig einen ringförmigen Wulst aufweist, welcher mit zwei axial in den Endoskopoptik-Kopf eingeschraubten Spannringen korrespondiert und daß die distale Seite des Okularhülsenumfangs gegen drei radial in den Optikkopf hineinragende Justierschrauben anliegt.According to the invention the object is achieved in that a cylindrical eyepiece proximal has an annular bead, which corresponds to two axially screwed into the endoscope optics head clamping rings and that the distal side of the Okularhülsenumfangs abuts against three radially into the optical head protruding adjustment screws.

Advantageously, the annular bead of the eyepiece sleeve is spherical. The axial clamping rings are each provided with an external thread and an axial center hole, each Center hole is developed on one side with a spherical end mill. The clamping rings continue to have slots, which on the one hand on the face with the end mill preparation and

andererseits auf der Stirnfläche ohne Schaftfräser-Ausarbeitung angeordnet sind.On the other hand, are arranged on the face without end mill preparation.

According to the invention, the eyepiece is movable in the axial direction, so that it is at an axial distance from the stationary Image transfer system is positioned, resulting in a sharp and sharply defined image. Due to the radial mobility of the eyepiece, an image can be set which exactly corresponds to the desired viewing direction

wiedergibt und abschneidungsfrei ist.is reproduced and free of clipping.

embodiment The invention will be explained in more detail below using an exemplary embodiment. The FIGURE represents an axial sectional view through the proximal part of an endoscope optical system. In the distal part of an endoscope optics head -1- end an outer tube -2- and an inner tube -3-. Between the outer tube -2- and

dem Innenrohr -3- verlaufen Lichtleitfasern -A- bis in den Anschlußstutzen -5- für ein nichtdargestelltes Lichtleitkabel. Imthe inner tube -3- extend optical fibers -A- into the connecting piece -5- for a not shown optical fiber. in the

Inner tube -3- rod lenses -6- are arranged. On the rod lens -β- is fixed or loose a support ring -7- applied. Between the support ring -7 · and three by 120 "offset adjusting screws -8- is a compression spring -9-, which the Rod lenses -6- and not shown spacer tubes of the endoscope optics abuts against each other and length differences Temperature fluctuations compensates. Within the compression spring -9- is the Okularhülse -10- with a diaphragm -11 - and a lens -12-. On the proximal side, the eyepiece sleeve -10- has an annular bead -13-, which in axial elaborations of clamping rings -14-

zu liegen kommt.to come to rest.

That is, the bead 13- is spherical and the two center holes of the clamping rings 14 are spherical one-sided concave

ausgearbeitet. Die Spannringe -14- sind mit einem Außengewinde versehen und damit in den Optik-Kopf -1- einschraubbar.elaborated. The clamping rings -14- are provided with an external thread and can thus be screwed into the optical head -1-.

On the distal side, the eyepiece sleeve -10- with its aperture -11- is held by the three adjustment screws -8-. The proximal end of the optic head -1- forms a Okulartrichter-15-, which is screwed to the optical head -1-. The assembly and adjustment of the endoscope optics according to the invention takes place as follows: The compression spring 9 is pressed against the support ring -7- so far that the three offset by 120 ° adjustment screws -8-

eingeschraubt werden können und danach die Druckfeder -9- gegen sie anschlägt.can be screwed and then the compression spring -9- strikes against them.

Now the front clamping ring -14- is screwed in and the eyepiece inserted. In this case, the bead -13- is in the concave elaboration of the clamping ring -14-. Under visual inspection by the optical system of the endoscope optics, the first clamping ring -14- is screwed in until it reaches its end

der Blendenebene -11- das Beobachtungsobjekt in gewünschter distaler Entfernung" scharf abgebildet wird.the viewing plane at the desired distal distance "is sharply imaged.

Once this has been done, the second clamping ring -14- is screwed in until its concave preparation forms the convex bead.

leicht berührt.slightly touched.

Thus, the focus of the endoscope optics is completed by adjusting the depth of the eyepiece. Again under visual inspection by the optical system of the endoscope optics and using a device for Display of the required viewing direction is adjusted by adjusting screws -8-until the desired viewing angle is set

ist und ein abschneidungsfreies Bild erhalten wurde. Durch das Verstellen der Justierschrauben -8- wird das Okular - und damit insbesondere die Blende -11- um das Zentrum des konvexen Wulstes -13- in den konkaven Ausarbeitungen der Spannringe -14-geschwenkt.is and a truncation-free image was obtained. By adjusting the adjustment screws -8- the eyepiece - and thus in particular the aperture -11- about the center of the convex bead -13- in the concave elaborations of the clamping rings -14-pivoted.

Thus, the image section of the endoscope optics follows directly the axial movement of the adjusting screws -8-, whereby a

unkomplizierter Justiervorgang entsteht, der sich äußerst leicht beherrschen läßt.uncomplicated adjustment process arises, which can be controlled extremely easily.

Once the desired optical imaging quality has been achieved, tighten the second clamping ring -14-. The position of the eyepiece is thus adjusted and fixed.

Claims

1. adjusting device for an endoscopic eyepiece, which is held in a cylindrical sleeve and with the aid of radially directed screws on a stationary image guide system is aligned, characterized
characterized in that the cylindrical eyepiece sleeve (10) can be screwed with an annular bead (13) between two axially into the endoscope optics head (1) and with the bead (13).
corresponding clamping rings is adjustable.

2. Adjusting devices according to claim 1, characterized in that the annular bead (13) is spherical.

3. Adjusting device according to claim 1, characterized in that the clamping rings (14) are formed on one side concave k'ugelförmig.

4. Adjusting device according to claim 1, characterized in that the bead (13) facing away from the eyepiece sleeve (10) bears against three radially oriented adjusting screws.