JPS6286321A - Operation microscope having beam splitter provided in image forminmg optical path - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a surgical microscope having a beam splitter arranged in the imaging optical path.

[Prior art 1] A beam splitter is provided in the imaging optical path of a stereomicroscope in order to project additional various information together for the observer or to provide an additional observation optical path. This is already known. In any case, the various additional information obtained using X-ray technology and ultrasound technology and information that assists in the sense of direction, which are already present before the surgery, are stored in the memory of the surgeon. It must be stored in. However, in microsurgical working methods, spatial orientation cannot be determined satisfactorily using the various information stored in memory.

[Problem to be solved by the invention] Due to the spectrally diffuse reflectance of various exposed surfaces,
On such a surface, a) various features of the γ-phase geometry, or various mathematically derived quantities and features of the above-mentioned quantities and features, Additional information, such as can be retrieved by a function of This also applies to various images obtained by different stages, such as computed tomography and ultrasound tomography.

The purpose of the present invention is to reduce the burden on the surgeon and improve his ability to see during surgery.

It is therefore an object of the present invention to expand the information provided to the surgeon about divine states 111, which in particular are only slightly or only +1F capable of direct observation.・It is to play 11 so.

``Example 1'' The present invention will now be described in detail with reference to FIG. 1, with reference to FIG.

An intermediate image plane 5 is formed between the object plane 1, the 1″ f-body objective lens 2, the magnification change device 3 realized by two Kaliray systems or zoom systems, and the lens barrel lens and the eyepiece lens. A beam splitter 6 is provided in the IFF microscope, which consists of a binocular eyepiece system 4 and a beam splitter 6, which allows approximately 50% of the light rays departing from the object to be extracted out of the system of the surgical microscope. is placed in one of the two optical paths of the surgical microscope.The extracted light beam is optionally routed out of the optical path by a filter revolver.
Via a removable color filter 7 and an imaging lens 8, a video camera 9 is reached 17, which is connected via a computer IO with a storage device to a color video screen 11.

An imaging objective lens 12 whose focal plane coincides with the image screen 11 and an IjT of being inserted into the optical path.
(i'f; via another color filter 13, the light rays starting from the video screen 11 reach the light beam splitting prism 6. This light splitting prism 6 receives the light rays starting from the video screen 11 from the object 1. The binocular eyepiece system is turned with about 50 turtles of light 4
Let it enter inside. In this case, the respective images of the object 1 and the image screen 11 are first created in a common intermediate image plane 5. Second video screen in the motor 1
A beam 4j and a light beam 14 are provided for operatively controlling the computer 10. The video screen 11, the objective lens 12 and the filter 13 are integrated into one compact structural unit consisting of the stiffness removed by conventional mechanical means, in particular by dovetail rings (llinHs).
It is also an ivr option to attach it to a surgical microscope using a 1. microscopic imaging of the superposition of the object 1 into an intermediate image plane 5 and an objective 8 of this object 1;
The imaging into the intermediate image plane 5 via the video camera 9, the video screen 11 and the objective lens 12 is adjusted to match the image distortion of both. An illumination system consisting of a condenser lens 15 and a light source 16 is used to illuminate the object 1.

The operating mode of the device according to the invention is as follows. The object 1 is illuminated by the illumination system +5, Ifi, formed into an image by the objective lens 2 of the surgical microscope, optionally magnified by the magnification changing device 3, and presented for observation by the surgeon via the eyepiece system 4. . At that time, this surgeon
Observe. Via a splitting prism 6 the optical path is split, and by means of an objective lens 8 an image of the object 1 is produced on the photosensitive layer of the video camera and stored in the computer storage 41 device 10. This stored image is reproduced on the video screen 11 and projected into the microscope system by the objective lens 12 via the splitting prism 6, whereby the image of the video screen 11 is formed in the intermediate image plane 5. Ru. The following method is used to match images produced directly optically and images produced via a video camera and video screen. Centroid wavelength (Schwerpunktwelle)
An interference filter 7 with a wavelength λ1 and a bandwidth Δλ1 is placed in the camera-side optical path and with a centroid wavelength λ
2 and a bandwidth Δλ2 of 41, a filter 13 is inserted in the optical path on the video screen side, in which case ＾1〈＾2,
and λ1+(△^l)/2 < ^2−(△λ,)
/2's each line is 1'1 or 11.

1st stage 1 (+'f- (camera I)
The memory of the J-Movie image is amazing. Next 1-Wataruta 7
4, j and l: 1 removed from the optical path 41. Mo'
N, ta! lfi k+ is switched off. In this state, i5's video camera 79 captures an image of 11 on the video screen displayed on the computer storage device +1;
+4; tIn this second stage l) Store the created image. The optical and ′[1(
(The first image produced by the I-logical imaging feature H, but this 'l
The transformation can be derived from J's, and this can be used to match the multitangential image and the image of the projected video screen to 11 for the storage device.

This transformation (Transfnrmal, 1nn) can be used permanently for the signal emitted by the camera 9 in the working program of the computer 10.

The interference filter 7 is arranged in a filter exchange device, which means that the camera takes pictures in a narrow spectral bandwidth and the transmission corresponding to the selected subspectral band consisting of and processed here. By means of this calculation-technical process, lines of equal likelihood h1 density, lines of equal color value, or local mathematical derivatives of their physical brightness can be formed on the video screen 11 by means of the splitting prism 6. It is imaged and is represented as a colored line which is correspondingly superimposed on its directly optically produced intermediate image. The surgeon thus has the possibility of recognizing additional, especially pathological, features directly within the surgical field.

In a further embodiment, the solid infrared radiation of the object is measured locally in a known manner and is plotted by isotherms at -1- on the video screen. In a further embodiment of the Machi 1 microscopic device according to the invention, the object is optically 41. ! ! +
14! i? by the motor stepwise with a step size smaller than its optical depth of field over the entire distance of the available depth of field. Means are provided for changing l'mlt. All the images thus obtained and placed in the computer 10 are reduced to fidgety characteristic contours by means of known electronic image processing F-stages on the image screen 11. It is then superimposed by a beam splitter 6 with an optically produced image of the instantaneous image plane 1 of the object.

In another embodiment of the microscope apparatus according to the present invention, various data and image information from an external system, such as X-ray tomography, ultrasound tomography, IJ fox nucleus spin/computed tomography, etc., are manually transferred to the computer 10. Let 1
A -r stage is provided for projecting stages and corresponding various images into the surgical microscope.

In a further embodiment of the microscope device according to the invention, its phase 17" operative display 11° light bezel 1
A combination with 4 is used. Using this light pen, for example, the N1 of the structure of the object (e.g. the diameter and spacing of blood vessels, etc.)
Various marks can be set which are projected on the intermediate image plane and can be used for forensic measurements or to provide information to the surgeon.

[Brief explanation of drawings]

The accompanying drawing is a schematic illustration of an example of a surgical microscope according to the present invention. ! ...Object 2...Objective lens 3...Magnification changing device 4...Binocular eyepiece system 5...Intermediate image plane 6...Light ray splitter 7.13...Filter 8.12 .15
···lens

Claims (4)

[Claims] (1) A surgical microscope having a beam splitter installed in the imaging optical path, which is equipped with an image reproduction unit coupled to a photographing device, and reproduces the image in an intermediate image plane to be observed by an eyepiece. The above-mentioned surgical microscope is characterized in that the image of the unit is matched with the direct optical image of the target object and projected by the above-mentioned light beam splitter, and the surgical area is explored by the above-mentioned photographing device via the light beam splitter. . (2) the image reproduction unit is combined with several means for electronically processing and depicting the image of the surgical field;
A surgical microscope according to claim 1. (3) A surgical microscope according to claim 1, which performs exploration of a surgical area prior to surgery. (4) A surgical microscope according to any one of claims 1 to 3, in which various marks inserted into the intermediate image are projected by an optical pen.