DE9003458U1 - Variable focal length lens for surgical microscopes for microsurgery - Google Patents
Variable focal length lens for surgical microscopes for microsurgeryInfo
- Publication number
- DE9003458U1 DE9003458U1 DE9003458U DE9003458U DE9003458U1 DE 9003458 U1 DE9003458 U1 DE 9003458U1 DE 9003458 U DE9003458 U DE 9003458U DE 9003458 U DE9003458 U DE 9003458U DE 9003458 U1 DE9003458 U1 DE 9003458U1
- Authority
- DE
- Germany
- Prior art keywords
- focal length
- microsurgery
- variable focal
- length lens
- surgical microscopes
- 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
- 238000002406 microsurgery Methods 0.000 title claims description 6
- 238000006073 displacement reaction Methods 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 3
- 210000004556 brain Anatomy 0.000 description 2
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B9/00—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -
- G02B9/04—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having two components only
- G02B9/10—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having two components only one + and one - component
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
- G02B15/142—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having two groups only
- G02B15/1425—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having two groups only the first group being negative
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B21/00—Microscopes
- G02B21/02—Objectives
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Microscoopes, Condenser (AREA)
- Lenses (AREA)
Description
Objektiv variabler Schnittweite für OperationsmikroskopeVariable focal length lens for surgical microscopes für die Mikrochirurgiefor microsurgery
Die Neuerung betrifft ein Objektiv variabler Schnittweite für Operationsmikroskope für die Mikrochirurgie.The innovation concerns a lens with variable focal length for surgical microscopes for microsurgery.
Ein Objektiv variabler Schnittweite, das die Anpassung des Arbeitsabstandes an unterschiedliche Objekthöhen ohne Positionsänderung des Mikroskopkörpers erlaubt, ist aus der DE-PS 24 39 820 bekannt. Es besteht aus einem feststehenden, austauschbar angeordneten und dem Operationsfeld zugewandten negativen Linsenglied und einem verschiebbaren positiven Linsenglied.A lens with a variable focal length, which allows the adjustment of the working distance to different object heights without changing the position of the microscope body, is known from DE-PS 24 39 820. It consists of a fixed, interchangeably arranged negative lens element facing the operating field and a movable positive lens element.
Nachteilig bei diesem vorbekannten Objektiv ist, daß sein Schnittweitenbereich (auch Fokussierbereich genannt) für die Anforderungen der modernen Mikrochirurgie, z.B. im Ohr, im Auge, in tiefen Bereichen des menschlichen Gehirns, zu eng begrenzt ist, wenn mit einer einzigen Linsenkombination gearbeitet wird. Im beschriebenen Ausführungsbeispiel wird ein positives Linsenglied der Brennweite f = 120mm um 16mm verschoben. Mit einer vorgewählten Brennweite des feststehenden negativen Linsengliedes von f = - 200mm verschiebt sich der Fokuspunkt des Objektivs und damit der Arbeitsabstand lediglich von 160mm bis 220mm. Soll ein größerer Bereich für den Arbeitsabstand überstrichen werden, wird das feststehende negative Linsenglied gegen ein anderes ausgetauscht, im angegebenen Beispiel gegen eines mit der Brennweite f = - 160mm, mit dem sich der Fokuspunkt dann von 197mm bis 300mm verschiebt. Der Zwang zum Auswechseln eines optischen Gliedes im Operationsmikroskop wirkt sich aber sehr störend aus, wenn während einer Operation in größere Tiefen des menschlichen Körpers beispielsweise im Gehirn, vorgedrungen werden muß.The disadvantage of this previously known lens is that its focal length range (also called focusing range) is too narrow for the requirements of modern microsurgery, e.g. in the ear, in the eye, in deep areas of the human brain, when working with a single lens combination. In the described example, a positive lens element with a focal length of f = 120mm is shifted by 16mm. With a preselected focal length of the fixed negative lens element of f = - 200mm, the focal point of the lens and thus the working distance only shifts from 160mm to 220mm. If a larger area for the working distance is to be covered, the fixed negative lens element is exchanged for another, in the example given for one with a focal length of f = - 160mm, with which the focal point then shifts from 197mm to 300mm. However, the need to replace an optical element in the surgical microscope is very disruptive when an operation requires access to greater depths of the human body, for example the brain.
Ein weiterer Nachteil besteht in der Begrenzung des Verschiebeweges von maximal 20mm, was bei gleichem Fokussierbereich eine angespanntere Optik bedingt als bei längerem V e r sch i ebeweg.A further disadvantage is the limitation of the displacement path of a maximum of 20 mm, which results in a more tense optic for the same focusing range than with a longer displacement path.
Der vorliegenden Neuerung liegt deshalb die Aufgabe zugrunde, ein fokussierbares Objektiv für Operationsmikroskope anzugeben, das aus einem feststehenden Negativglied und einem verschiebbaren Positivglied besteht, und das ohne Wechsel von optischen Gliedern einen Schnittweitenbereich von 150mm bis 450mm aufweist.The present innovation is therefore based on the task of specifying a focusable lens for surgical microscopes, which consists of a fixed negative element and a movable positive element and which has a focal length range of 150 mm to 450 mm without changing optical elements.
Diese Aufgabe wird mit einer im kennzeichnenden Teil des Schutzanspruches angegebenen Merkmalskombination für das verschiebbare positive Linsenglied gelöst.This problem is solved with a combination of features specified in the characterizing part of the protection claim for the displaceable positive lens element.
Die mit der Neuerung erzielbaren Vorteile liegen insbesondere darin, daß der Operateur für alle derzeit bekannten Arbeitsgebiete der Mikrochirurgie für das Operationsmikroskop nur ein einziges Objektiv benötigt, mit dem er in einem Fokussierbereich von 150mm bis 450mm arbeiten kann, ohne daß optische Teile ausgewechselt werden müssen.The advantages that can be achieved with the innovation are in particular that the surgeon only needs a single lens for the surgical microscope for all currently known areas of microsurgery, with which he can work in a focusing range of 150 mm to 450 mm without having to replace optical parts.
Ein weiterer Vorteil ergibt sich aus dem größeren Verschiebeweg des positiven Linsengliedes, durch den die Optik entspannter und damit die Abbildungsqualität erhöht wird.A further advantage is the greater displacement range of the positive lens element, which makes the optics more relaxed and thus increases the image quality.
Im folgenden werden für vier Ausführungsbeispiele die Schnittweiten angegeben bei verschiedenen Verschiebewegen (d) und Brennweiten (f<) und (f?) für das positive und das negative Linsenglied (Fig. 1 + 2).In the following, the intersection lengths are given for four examples of design with different displacement paths (d) and focal lengths (f<) and (f?) for the positive and the negative lens element (Fig. 1 + 2).
r ♦ ♦ ·r ♦♦ ·
Bei spi el 1 :Example 1 :
s = 160mm für d = 22mm s = 430mm für d = 0mm mit f.] = 102mm, f2 = -108,1mm;s = 160mm for d = 22mm s = 430mm for d = 0mm with f.] = 102mm, f 2 = -108.1mm;
s = 150mm für d = 27mm s = 450mm für d = 0mm mit f^ = 108,2mm, f2 = -116mm;s = 150mm for d = 27mm s = 450mm for d = 0mm with f^ = 108.2mm, f2 = -116mm;
Bei spi et 3:At spi et 3:
s = 150mm für d = 30mm s = 450mm für d = 0mm mit f-j = 113,9mm, f2 = -125,4mm.s = 150mm for d = 30mm s = 450mm for d = 0mm with fj = 113.9mm, f 2 = -125.4mm.
Bei spi eL 4:In game 4:
s = 193,3mm für d = 21,7mm s = 409mm für d = 0mm mit f.] = 116,6mm, f2 = -132,5mms = 193.3mm for d = 21.7mm s = 409mm for d = 0mm with f.] = 116.6mm, f 2 = -132.5mm
In der Zeichnung sind die wesentlichen Größen der Erfindung dargestellt, und zwar zeigtThe drawing shows the essential dimensions of the invention, namely
Figur 1 das Objektiv für maximalen Schiebeweg (d^) und minimale Schnittweite (S^);Figure 1 the lens for maximum sliding travel (d^) and minimum focal length (S^);
Figur 2 das Objektiv für minimalen Schiebeweg (dp) und maximale Schnittweite (S2)-Figure 2 the lens for minimum sliding travel (dp) and maximum focal length (S 2 )-
Claims (1)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE9003458U DE9003458U1 (en) | 1990-03-24 | 1990-03-24 | Variable focal length lens for surgical microscopes for microsurgery |
| DE9016892U DE9016892U1 (en) | 1990-03-24 | 1990-12-14 | Variable focal length lens for surgical microscopes for microsurgery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE9003458U DE9003458U1 (en) | 1990-03-24 | 1990-03-24 | Variable focal length lens for surgical microscopes for microsurgery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE9003458U1 true DE9003458U1 (en) | 1990-05-31 |
Family
ID=6852303
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE9003458U Expired - Lifetime DE9003458U1 (en) | 1990-03-24 | 1990-03-24 | Variable focal length lens for surgical microscopes for microsurgery |
| DE9016892U Expired - Lifetime DE9016892U1 (en) | 1990-03-24 | 1990-12-14 | Variable focal length lens for surgical microscopes for microsurgery |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE9016892U Expired - Lifetime DE9016892U1 (en) | 1990-03-24 | 1990-12-14 | Variable focal length lens for surgical microscopes for microsurgery |
Country Status (1)
| Country | Link |
|---|---|
| DE (2) | DE9003458U1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5496261A (en) * | 1993-07-30 | 1996-03-05 | Carl-Zeiss-Stiftung | Combination of a viewing and/or documenting apparatus and an endoscope as well as a method of operating the combination |
| US5530587A (en) * | 1994-02-17 | 1996-06-25 | Carl-Zeiss-Stiftung | Stereomicroscope with adjustable objective and prismatic cubes |
| US5748367A (en) * | 1994-10-13 | 1998-05-05 | Carl-Zeiss-Stiftung | Illuminating device for a stereo microscope |
| DE19541237B4 (en) * | 1994-11-12 | 2006-04-13 | Carl Zeiss | Pancratic magnification system |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5701196A (en) * | 1993-11-05 | 1997-12-23 | Olympus Optical Co., Ltd | Stereomicroscope |
| DE10349293B4 (en) * | 2003-10-23 | 2010-10-21 | Carl Zeiss Surgical Gmbh | Stereo Microscopy System and Stereo Microscopy Method |
| CN101825762A (en) | 2003-10-23 | 2010-09-08 | 安德里斯·奥布雷斯基 | Imaging optical system |
| JP5093979B2 (en) | 2003-12-10 | 2012-12-12 | カール ツァイス メディテック アーゲー | Objective lens for observation apparatus, microscope, and method for adjusting objective lens |
| DE102006009452B4 (en) | 2005-10-20 | 2010-07-01 | Carl Zeiss Surgical Gmbh | stereomicroscope |
| DE102006012388A1 (en) | 2005-10-20 | 2007-04-26 | Carl Zeiss Surgical Gmbh | microscopy system |
-
1990
- 1990-03-24 DE DE9003458U patent/DE9003458U1/en not_active Expired - Lifetime
- 1990-12-14 DE DE9016892U patent/DE9016892U1/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5496261A (en) * | 1993-07-30 | 1996-03-05 | Carl-Zeiss-Stiftung | Combination of a viewing and/or documenting apparatus and an endoscope as well as a method of operating the combination |
| US5530587A (en) * | 1994-02-17 | 1996-06-25 | Carl-Zeiss-Stiftung | Stereomicroscope with adjustable objective and prismatic cubes |
| DE19504443B4 (en) * | 1994-02-17 | 2005-04-21 | Carl Zeiss | stereomicroscope |
| US5748367A (en) * | 1994-10-13 | 1998-05-05 | Carl-Zeiss-Stiftung | Illuminating device for a stereo microscope |
| DE19541237B4 (en) * | 1994-11-12 | 2006-04-13 | Carl Zeiss | Pancratic magnification system |
Also Published As
| Publication number | Publication date |
|---|---|
| DE9016892U1 (en) | 1991-03-14 |
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