Optical: systems and elements – Compound lens system – Microscope
Patent
1998-12-03
2000-06-27
Henry, Jon
Optical: systems and elements
Compound lens system
Microscope
356394, 382151, 36446821, G02B 2136, G01B 908
Patent
active
060813709
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a system with a microscope, and a method for the spatial determination of the position of a microscope. The object viewed through the microscope does not necessarily have to be a still object, but in the scope of this invention it can also be a moving object.
Especially in medicine, it is of great importance that, with simultaneous knowledge of the posit ion of the patient and the setting data of the microscope, it is possible to conclude the precise viewing location (operating field). This is becoming constantly more important in modern microsurgery. It is made possible for the surgeon to carry out an operation with great safety at the correct position. The importance of such knowledge is increasing with the advancing technology of making visible different image data, for example X-ray, CT, PE or MRI image data or the like in a microscope beam path, or superposing these on the image seen, so that the surgeon receives locally correctly presented comparison information concerning the operating field.
However, the invention can be beneficially used not only in medicine, but also in other areas where microscopic investigations are carried out.
The determination of the position of a microscope and thus of the operating field seen through the microscope, in accordance with the current state of the art, takes place for example by means of infrared positioning system. On the microscope there are disposed three infrared transmitters with encoded transmitted signals, the signals of which are detectedly infrared receivers disposed in space.
Somewhat older, but still used methods of determining position are: on the one hand the use of a microscope carrier frame, which at the joints has measuring elements (similar to a robot arm), which constantly follow the change in position of the microscope and determine the position by means of a microprocessor; on the other hand, the determination of the position by means of ultrasonic transmitters and sensors which are disposed on the microscope.
However, in the case of all previously known methods for determining position, problems arise in spite of fundamental functional competence. In the case of the older methods, it has to be borne in mind that the patient should not be influenced by the determination of position, and likewise any possible measurement results within the region viewed (e.g. site of operation) should not be influenced by the method of determining position. These two problems are solved with the use of the infrared positioning system. In this case, the problem does however arise that the infrared receivers are fitted at a spacing from the IR diodes or marking diodes of the microscope in space. A result of this is that an interfering influence may arise between transmitter and receiver. This can, for example, be caused by human who passes, or who brings an object, into the region of the signal exchange.
The last-mentioned problem has not been satisfactorily solved for quite a few applications. However, the location position of the patient relative to the microscope is an important item of information. Accordingly, the object of the invention is to provide a microscope with a system for determining position, which system permits no external interfering influences which may influence and falsify the determination of position. Accordingly, the intention is to know to where the microscope is precisely oriented, without in this case or for this purpose, as user, having to view through the microscope.
Furthermore, other image data (e.g. X-ray, CT or MRI image data) are to be capable of being superposed correctly in terms of position on the image viewed.
The object is achieved by the use, according to the invention, of at least one image recording unit on the microscope and at least one test body which serves for the calibration of the system and for measurement. In this case, the test body should be fixedly connectable to the object to be viewed, and specifically both in the course of microscopic examination and also previously in the course
REFERENCES:
patent: 4989082 (1991-01-01), Hopkins
patent: 5422693 (1995-06-01), Vogeley et al.
patent: 5657128 (1997-08-01), Muller et al.
patent: 5889611 (1999-03-01), Zonneveld
Henry Jon
Leica Mikroskopie Systeme AG
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