WO2015091623A1

WO2015091623A1 - Surgical microscope with additional illumination

Info

Publication number: WO2015091623A1
Application number: PCT/EP2014/078182
Authority: WO
Inventors: Hakim El Haddouchi
Original assignee: Leica Microsystems (Schweiz) Ag
Priority date: 2013-12-19
Filing date: 2014-12-17
Publication date: 2015-06-25
Also published as: DE102013226784A1

Abstract

The present invention relates to a surgical microscope (100), an additional illumination device (300) for a surgical microscope (100) and a method for illuminating an object field in an object plane of a surgical microscope (100). The surgical microscope (100) comprises a main illumination device (200) and an additional illumination device (300), wherein the main illumination device is designed to illuminate a main illumination field (250) in an object plane by means of a main illumination beam path (240) guided via a main objective (111) of the surgical microscope (100), wherein the additional illumination device (300) is designed to generate a spot-shaped additional illumination beam path (340) and to guide the latter to a predetermined location within or outside the main illumination field (250) or in a manner overlapping the latter into the object plane.

Description

surgical microscope

description

The present invention relates to a surgical microscope, a

Additional illumination device for a surgical microscope and a method for illuminating an object field in an object plane of a surgical microscope. The surgical microscope in this case comprises a main illumination device and an additional illumination device, wherein the main illumination device is adapted to a main illumination field in an object plane by means of a guided over a main objective of the surgical microscope

To illuminate the main illumination beam path.

State of the art

For surgical microscopes, especially ophthalmic

Operating microscopes, with incident illumination is the

Illumination light is guided either almost coaxial to the optical axis of the observation optics ("0 ° illumination") or at a smaller or larger angle to the optical axis of the microscope on the object in the object plane, the latter possibility is also known as oblique illumination.

In order to avoid shadowing of the object to be illuminated by any higher object areas, can

Illumination devices for surgical microscopes with two

Illuminating beam paths are operated, which are usually in one Angle relative to each other and to the optical axis of the

Operating microscopes run.

Such a lighting device is known for example from DE 197 28 035 B4 as part of an observation device, in particular in the form of a stereomicroscope. Light of an illumination source is on the one hand via a deflection mirror in a

Main illumination beam path and on the other hand on more (deflection) mirror in an additional illumination beam path on a too

observed object. Main illumination beam path and additional illumination beam path each run obliquely to the optical axis of the stereomicroscope and are each other

depending on the cutting edge.

Further embodiments of a lighting device with two illumination beam paths, for example, from the

DE 10 2008 011 527 AI or DE 296 01 263 Ul known.

From JP 11-109254 A, for example, a lighting device for a surgical microscope is known, in which the illumination light is directed via a partially transmissive mirror via the lens to the object. In the illumination beam path is a rotatably mounted

Aperture disc arranged with different aperture shapes, which can optionally be introduced into the illumination beam path to produce different illumination angles and fields.

The said lighting devices is inherent in that the two illumination beam paths are generated by beam splitting from a single illumination source. The illumination beam paths are thus coupled to one another. A change of illumination parameters of the light source, for example the intensity, thus requires one Change for both illumination beam paths. Furthermore, for example, a change in the orientation or position of individual elements of the illumination device can also affect both

Affect illumination beam paths.

From the pre-registered, not yet published German

Patent application DE 10 2012 221 955.2 discloses a lighting device for a surgical microscope with a main illumination beam path and a coaxial illumination beam path, wherein each of the illumination beam paths is assigned its own light source. The coaxial illumination beam path is responsible for the so-called red-reflex illumination and the main illumination beam path for the ambient illumination during interventions on the human eye. Both illumination beam paths can optionally be switched on and off; also their illuminance levels are independently adjustable. By means of an Eclipse filter, which in the

Main illumination beam path is introduced, can in the object field a the illumination field of the coaxial illumination beam path

corresponding illumination field from the illumination field of

Main illumination beam path are cut out or shadowed.

It is therefore desirable to improve a lighting device for a surgical microscope with two illumination beam paths in such a way that a more flexible illumination of an object in the object plane is made possible.

Disclosure of the invention

According to the invention, a surgical microscope, a

Additional lighting device for a surgical microscope and a Method for illuminating an object field in an object plane of a surgical microscope with the features of the independent

Claims proposed. Advantageous embodiments are the subject of the dependent claims and the following description.

The surgical microscope according to the invention comprises a

Main illumination device and an additional illumination device, wherein the main illumination device is adapted to a main illumination field in an object plane by means of a guided over a main objective of the surgical microscope

To illuminate the main illumination beam path.

According to the invention the additional lighting device is to

arranged to generate a spot-shaped additional illumination beam path and to lead this to a predetermined location inside or outside the main illumination field or overlapping to this in the object plane.

The additional illumination field generated by the spot-shaped additional illumination beam path in the object plane is a so-called spot illumination field. Such a spot illumination field has a comparatively small area or a comparatively small diameter compared to the main illumination field. This comparatively small area of the spot illumination field is in particular illuminated with a comparatively high intensity in comparison with the main illumination field.

Advantages of the invention

By means of the spot illumination field generated by the additional illumination beam path in the object plane, in particular comparatively illuminated dark or dimly lit areas and / or areas of particular interest in the object plane. Thus, it is ensured that those areas of the object plane which are only insufficiently illuminated by the main illumination device or the main illumination beam path, by means of

Additional lighting device or the spot-shaped

However, additional illumination beam path can be well illuminated and well recognized by a user or a surgeon.

The additional illumination beam path and thus the spot illumination field is thereby guided in particular to a location in the object plane which contains a deep cavity or a low-lying tissue layer. Regions of the object with a cavity can cause shading of the interior of the cavity. Shading can also be caused by protruding object structures. Through the spot-shaped

Extra illumination beam path ensures that such a shadow or shading of these places is avoided. This ensures that the best possible illumination of all locations or areas in the object plane is ensured.

The main lighting device may in particular as a

Inclined lighting device to be formed. It is the

Main illumination beam path under a larger angle to the optical axis of the surgical microscope than that of the additional illumination beam path guided in the object plane. An oblique illumination device has the advantage that the

Lighting light of the main lighting device is not reflected back from the object in the eye of the user or surgeon.

For example, it can thus be avoided in surgical microscopes that a surgeon is blinded and disturbed. Such oblique lighting devices can be smaller in height can be realized because it can be dispensed with elements that couple the main illumination beam path close to the axis in the main objective and accordingly require a certain height.

Since with oblique lighting there is an increased risk that locations in the object plane are shaded with deeper cavities and / or with protruding object structures, it is particularly expedient to additionally illuminate these locations by means of the spot illumination field of the

Illuminate additional lighting device.

In particular, the main illumination field and the spot illumination field at least partially overlap. This overlapping or overlapping region can thus be lifted or highlighted from the remaining regions in the object plane. Thus, the user's attention to this by means of the

Spotlight field highlighted area of the object plane. This ensures that a user, in particular a surgeon, does not neglect an important area in the object plane. By appropriately guiding the

Auxiliary illumination beam path to a specific location, the field of vision of the user or the surgeon is directed to this particular location. Thus, in particular a concentration and memory support can be created for the user or the surgeon. This ensures that the user or surgeon is particularly dedicated to certain locations of the object.

Furthermore, the main illumination field can be detected by means of the

Spot lighting field to be expanded. The object area of the spot lighting field, which does not coincide with the

Main illumination field overlaps, thus can additionally

be lit up. By the additional lighting device can thus a total of a larger illumination field in the object plane are illuminated than with the main lighting device alone. An illumination curve, which indicates an intensity of the illumination of the object plane by the main observation device, can thus be extended by the additional illumination device by an additional peak.

The main lighting device and the

Additional lighting device are in particular completely decoupled from each other and formed independently. The main lighting device and the auxiliary lighting device each have their own light source. Furthermore, the

Main lighting device and the auxiliary lighting device in particular each individual optical elements for forming and guiding the respective illumination beam paths, such as screens, lighting optics or filters, which in each case exclusively by the main lighting device or the

Additional lighting device can be used. In particular, the main illumination device and the additional illumination device are separate components or elements of the surgical microscope and spatially separated from one another.

In particular, the main lighting device or the

Main illumination beam path and the additional illumination device or the additional illumination beam path each independently

controllable from one another, positionable, metered and / or adjustable. In particular, all parameters of the

Main lighting device or the main illumination beam path and the additional lighting device or the

Additional illumination beam path independently variable. In this case, geometrical and / or optical parameters for the two illumination devices can preferably be changed independently of one another. Geometric parameters influence, for example, the location, shape or diameter of the respective illumination fields. In contrast, optical parameters in particular influence light intensity,

Color temperature or Wellenfn] of the respective

Illumination beam path. In order to change geometric parameters, in particular individual optical elements of the respective

Lighting device are driven accordingly.

For example, the position of the lenses through which a

Illuminating beam path runs, or the opening of corresponding aperture and the tilt angle of a deflection mirror, the

Direction of illumination beam path in the direction of the object plane, be changed to the location, shape and / or diameter of the respective

Adjust the illumination field. In contrast, in order to change optical parameters, the type of light source, its power and the type and position of filters in the illumination beam path can be changed in order to influence the light intensity, color temperature and / or wavelength (n) of the respective illumination beam path A separate control device may be provided which controls or controls the two illumination devices, for example, it is also possible to provide only one control device which controls or activates the two illumination devices separately.

The main illumination field and the spot illumination field are thus decoupled. The main illumination field and the spot illumination field can be adapted to each other independently of each other, individually adjusted to each other.

The object in the object plane can thus be best illuminated, whereby a best possible observation of the object for a Observers is guaranteed. In particular, during an operation by means of the surgical microscope can thus be ensured that the user or surgeon can best recognize the object, in particular an area to be operated.

The spot illumination field generated by the additional illumination beam path in the object plane is preferably at least 50% smaller than that produced by the main illumination beam path

Home lighting field. More preferably, the size of the

Spot lighting field 10% to 25% of the main lighting field. In this case, the diameter or the area of the spot illumination field can be 50%, in particular between 10% and 25%, of the diameter or the area of the main illumination field.

Preferably, the additional lighting device is adapted to the additional illumination beam path via the main objective of

Operating microscope to the object level to lead. Of the

The main illumination beam path and the auxiliary illumination beam path can be coupled in via suitable optical elements and guided onto the main objective of the surgical microscope. Alternatively, it is also possible to guide the additional illumination beam path past the main objective to the object plane. This allows the

Additional illumination beam path can be flexibly guided to the predetermined location in the object plane.

Preferably, the additional lighting device is arranged in a module independent of the main lighting device. In particular, this module can be flexibly connected to or separated from the surgical microscope.

Main lighting device and auxiliary lighting device are thus in particular completely separate elements of the Operating microscopes and are controlled completely independently of each other.

The invention further relates to an additional illumination device for a surgical microscope and a method for illuminating a

Object field in an object plane of a surgical microscope.

Embodiments of this invention

Additional lighting device and the method according to the invention will become apparent from the above description of the surgical microscope according to the invention in an analogous manner.

Further advantages and embodiments of the invention will become apparent from the following description and the accompanying drawings. It is understood that the features mentioned above and those yet to be explained not only in each of the specified

Combination, but also in other combinations or in

Stand alone, without departing from the scope of the present invention.

The invention is illustrated schematically by means of exemplary embodiments in the drawing and will be described in detail below with reference to the drawing.

figure description

FIG. 1 schematically shows a preferred embodiment of a surgical microscope according to the invention. FIG. 2 schematically shows a lighting curve which can be generated by means of a preferred embodiment of a surgical microscope according to the invention.

FIG. 1 schematically shows a preferred embodiment of one

illustrated surgical microscope according to the invention and designated 100.

The surgical microscope 100 in this case has a tube 110. In the tube 110 suitable optical elements such as lenses,

Zoom systems and diaphragms may be arranged (in Figure 1 of the

For clarity, not shown}. FIG. 1 shows by way of example a main objective 111 of the surgical microscope 100.

By means of an eyepiece 112, an object field of an object 400 in an object plane can be observed enlarged by a user, in particular by a surgeon during an operation.

The surgical microscope 100 further has a

Main lighting device 200 on. The

Main lighting device 200 has a light source 210. By means of expedient and known optical elements 220, illumination light of the light source 210 is directed onto a deflection mirror 230. In FIG. 1, lenses and a diaphragm are shown as optical elements 220 only by way of example. From the deflection mirror 230, the illumination light is deflected via the main objective 111 onto the object 400 in the object plane.

Thus, a main illumination beam 240 becomes the

Main illumination device 200 via the optical elements 220, the deflection mirror 230 and the main lens 111 guided in the object plane. By the main lighting device 200 is thus a

Main illumination field 250 illuminated in the object plane.

An illuminated region 410 of the object 400, which has a comparatively deep cavity, can lead to shading of a location or area 420 of the object within the cavity 400. This may be the case in particular if the main illumination device 200 is designed as an oblique illumination device, as here.

In order for a surgeon to be able to recognize this (partly) shadowed area 420 well, an additional lighting device 300 is provided

provided, which is designed as a spotlight illumination device.

The auxiliary lighting device 300 has its own light source 310. By means of expedient and known optical elements 320, illumination light of the light source 310 is guided here via the main objective 111 to a predetermined location of the object 400 in the object plane. The additional illumination device 300 generates a spot-shaped additional illumination beam path 340, which in turn generates a spot illumination field 350 in the object plane.

The spot illumination field 350 may, in principle, be inside or outside the main illumination field 250 or with the

Main lighting field 250 overlap.

The spot lighting panel 350 has a much smaller one

Diameter or a much smaller area than that

Main illumination field 250. In particular, the shadowed area 420 of the object 400 is illuminated as a specific location by means of the spot illumination field 350. Thus, this (partially) shadowed area 420 are well lit so that the surgeon can easily see the area 420.

Alternatively, a specific area of the object 400 can also be illuminated by means of the spot illumination field 350, to which the surgeon should concentrate with particular attention in the course of the operation. By means of the spot illumination field 350, the surgeon's view can thus be implicitly directed to the spot illumination field 350. Thus, for the surgeon in particular a

Concentration support to be created.

The main lighting device 200 and the

Additional lighting device 300 are completely independent of each other and completely decoupled. The

Main lighting device 200 and the

Additional illumination device 300 in particular do not use any common optical elements except the main objective 111.

In particular, the auxiliary illumination device 300 is arranged in a separate module.

The main lighting device 200 or the

Main lighting beam 240 and the

Additional lighting device 300 or the spot-shaped

Additional illumination beam path 340 are each independently driven, positioned, metered and / or adjusted. For this purpose, the main illumination device 200 is controlled by means of its own control device 260. The additional lighting device 300 is here also controlled by means of a control device 360. Alternatively, the main lighting device 200 and the

Additional lighting device 300 also by means of a common Controllers are controlled, but completely decoupled and independently.

Optical parameters relating to the illumination light of the main illumination device 200 or the auxiliary illumination device 300 can be changed or adjusted independently of one another by means of the control device 260 or 360. Such parameters are in particular an intensity, color temperature and a wavelength of the respective observation light.

Furthermore, by means of the control device 260 or 360 geometric parameters with respect to the main illumination field 250 and the

Spot lighting field 350 are independently changed or adjusted. Such parameters are in particular location, shape and diameter of the main illumination field 250 or the

Spot illumination field 350. Thus, the main illumination field 250 and the spot illumination field 350 are completely decoupled and generated independently of each other.

The illumination of the object 400 by the main illumination field 250 and the spot illumination field 350 will be explained in detail below with reference to FIG.

In the upper part of FIG. 2, the main illumination field 250 according to FIG. 1 is shown in a plan view. Schematically, the region 420 of the object 400 with a lower cavity is shown. This (partially) shadowed area 420 is illuminated by the spot illumination field 350.

In the lower part of FIG. 2, a lighting curve of the object 400 or the object plane is shown schematically and with 500 designated. In this case, a (mean) intensity of the illumination light is shown on the vertical axis, which illuminates the object 400 (applied on the horizontal axis in one spatial direction) .The average intensity distribution of the main illumination field 250 by the main illumination device 200 corresponds in particular to a Gaussian curve 510. Due to the illumination of the spot illumination field 350 by means of the auxiliary illumination device 300 receives the

Lighting curve 500 an additional 520 peak.

LIST OF REFERENCE NUMBERS

100 surgical microscope

110 tube

111 main lens

112 eyepiece

200 main lighting device

210 light source

220 optical elements

230 deflection mirror

240 main illumination beam path

250 main lighting field

260 control unit

300 additional lighting device

310 light source

320 optical elements

340 Spot-shaped additional illumination beam 350 Spot illumination field

360 control unit

400 object

410 area of the object

420 area with cavity

500 lighting curve

510 Gaussian curve

520 peak

Claims

claims

1. Surgical microscope (100} with a

Main lighting device (200} and a

Additional lighting device (300}, wherein the

Main lighting device is set to a

Main illumination field (250} in an object plane by means of a guided through a main objective (111} of the operation microscope (100}

Main illumination beam path (240}, characterized in that the auxiliary illumination device (300} is adapted to generate a spot-shaped Zusatzbeleuchtungsstrahlengang (340} and this to a predetermined location inside or outside the main illumination field (250} or overlapping to this in the object plane to lead ,

2. Surgical microscope according to claim 1, characterized in that the of the additional illumination beam path (340} in the

Object illumination level generated by the object plane (350) is at least 50% smaller than the main illumination field (250} generated by the main illumination beam path (240).

3. Surgical microscope according to claim 2, characterized in that the size of the spot illumination field (350} 10% to 25% of the main illumination field (250}.

4. Surgical microscope according to one of claims 1 to 3, characterized in that the light intensity, the color temperature and / or wavelengths of the additional illumination beam path (340} independently of the corresponding sizes of the main illumination beam path (240} are adjustable.

5. Surgical microscope according to one of the preceding claims, characterized in that the location, shape and / or diameter of the spot illumination field (350} independently of the main illumination field (250} are adjustable.

6. Surgical microscope according to one of the preceding claims, characterized in that the additional illumination device (300) is adapted to the additional illumination beam path (340} on the main objective (111) of the surgical microscope (100} to the object level.

7. Surgical microscope according to one of the preceding claims, characterized in that the additional lighting device (300} in one of the main lighting device (200} independent module is arranged.

8. Additional illumination device (300) for a surgical microscope (100) according to claim 7.

9. A method for illuminating an object field in an object plane of a surgical microscope (100}, wherein a

Main illumination beam path via a main lens (111} of the surgical microscope (100} is performed to illuminate the object field in the form of a main illumination field (250}, and wherein the object plane additionally by a directed at them

Additional illumination beam path (340} in the form of a

Additional lighting panel (350} is lit, by

in that a spot-shaped illumination beam path with a spot-shaped illumination beam path (340) is provided as additional illumination beam path (340)

Illumination field (350) at a predetermined location within or outside the main illumination field (250} or overlapping it.

10. The method according to claim 9, characterized in that the size of the spot lighting field (350) to a size of less than

50%, in particular 10 - 25% of the size of the main illumination field (250} is set.

11. The method according to claim 9 or 10, characterized in that the light intensity, the color temperature and / or wavelengths of

Spot illumination beam path (340} regardless of the

corresponding sizes of the main illumination beam path (240}.

12. The method according to any one of claims 9 to 11, characterized

characterized in that the light intensity of the spot illumination field (350) is set higher than that of the main illumination field (250).

13. The method according to any one of claims 9 to 12, characterized

characterized in that the location, shape and / or diameter of the

Spotlight field (350} regardless of the

Main illumination field (250}.

14. The method according to any one of claims 9 to 13, characterized

characterized in that the auxiliary illumination beam path (340) via the

Main objective (111} of the surgical microscope (100} is guided to the object level.