Stereoscopic microscope

Abstract

Stereoscopic microscope comprising an optical inverter system (21a, 21b) for erecting a pseudo-stereoscopic image and reversing the viewing beams thereof, wherein the inverter system comprises at least one deflector element (21a, 21b) having a focal power.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS [0001] The present application claims priority of German patent application number 103 32 603.0 filed Jul. 17, 2003. FIELD OF THE INVENTION [0002] The present invention relates to a stereoscopic microscope of a type having an optical inverter system for erecting a pseudo-stereoscopic image and reversing of the viewing beams thereof. BACKGROUND OF THE INVENTION [0003] Ophthalmological microscopes as such are known. They comprise a main objective, a magnification system disposed thereafter, i.e. behind the main objective, and a binocular system with oculars (eyepieces). In order to provide a stereoscopic microscope in a magnification system, which is, for example, designed as a zoom system, the main beam path, which passes the main objective lens may be split into a number of beam paths. Further, ophthalmological microscopes are known, which allow for a simultaneous inspection of the object by a first user (main surgeon) and a second user (assis...

AI Technical Summary

Benefits of technology

[0008] For a stereoscopic microscope, the present invention aims to invert laterally inverted, pseudo-stereoscopic image in a simple way, i.e. to image in a laterally correct and stereoscopically correct manner.

[0010] With the inventive measure of providing an optical inverter system for erecting a pseudo-stereoscopic image and reversing the viewing beams thereof, comprising at least one deflector element provided with a focal power it is possible in a simple way to reduce the overall height of the stereoscopic microscope as compared to conventional solutions. Hence, it is possible in an advantageous manner to reduce the ergonomic overall height of the microscope as well.

[0011] It is advisable that a stereoscopic microscope comprises two deflector elements provided with a focal power. Thereby, it is possible, for example, to deflect a beam path, especially a horizontally proceeding one, which is incident upon the first deflector element, initially into a vertical (perpendicular) direction, and subsequently, by means of a further deflection by the second deflecting element to create a beam path, which proceeds substantially parallel to the original horizontal beam path. Thereby, a laterally and vertically correct image is created along the beam path, which proceeds vertically between the two microscope planes. Therefore, this vertically proceeding beam path may be used in an optimal manner. Thereby, the overall size of a stereoscopic microscope may be kept very small, and an available construction space may be exploited in an optimal manner.

[0012] According to an especially preferred embodiment of the stereoscopic microscope according to the invention, at least one deflector element of the inverter system is designed as a concave mirror. Concave mirrors may be provided in a simple and cost-effective way, and may further be adjusted easily. It is further imaginable to employ deflector prisms designed to have a focal power as deflector elements.

[0013] It is advisable that the stereoscopic microscope according to the invention comprises a main objective, which defines a first optical axis, and deflector elements to deflect a beam path proceeding parallel to the first optical axis along a second optical axis in a first plane of the microscope, which extends at an angle, in particular substantially perpendicularly to the first optical axis, and subsequently to be directed along a third optical axis in a second plane of the microscope, which extends substantially parallel to and above the first plane of the microscope. A stereoscopic microscope constructed in this way has a small overall height, as compared to conventional solutions, because a major part of the necessary or appropriate optical components, may be provided in the first and second planes of the microscope, which preferably extend horizontally.

[0015] It proves to be especially advantageous that at least one of the inverter system's deflector elements with a focal power additionally serves as deflector element for deflecting beam paths between the first, second and third optical axes. By means of such a multiple functionality of the deflector elements, construction space may be kept small in an effective way.

Problems solved by technology

However, the use of such SDI systems is accompanied by considerable disadvantages for the microscope system or the image quality of the microscope.

In particular, adapting the optical beam path of these supplementary systems to that of the stereo microscope has proved to be very cumbersome.

Frequently, this results in poor image quality and field clipping, which is caused by insufficient mechanical adaptation of the SDI-system to the microscope.

Further, the overall height of such SDI-systems influences the ergonomic overall height of the microscope in a negative way.

Images