JPS6161114A - stereo microscope - 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 [Industrial Application Field] The present invention is mainly used in the medical field, and particularly relates to a stereomicroscope that can vary the illumination angle of illumination to a subject.

[Prior Art] Stereo microscopes are widely used for medical purposes such as surgeries and examinations, as well as for research and industrial purposes, and are useful for improving precision and safety in surgeries, for example.

The degree of stereoscopic imaging in this stereomicroscope is achieved by observing the subject by giving a baseline interval of The stereoscopic effect will also increase. However, if the part of the subject to be observed is located deep, for example, the illumination light may not reach it or it may not be visible at a predetermined stereoscopic viewing angle. In other words, depending on the position of the observation site, observation may become impossible unless the illumination angle and stereoscopic viewing angle are made variable.

Therefore, in order to obtain accurate stereoscopic images, it is desirable to make the illumination angle and stereoscopic viewing angle variable during observation.

[Object of the Invention] In order to meet such demands, it is an object of the present invention to provide a stereomicroscope which is provided with means for varying the illumination angle and whose observation ability is improved.

[Summary of the Invention] The gist of the present invention for achieving the above-mentioned object is to provide a stereoscopic microscope in which a pair of left and right stereoscopic observation optical systems are arranged behind a common objective lens, and to detect a subject through the objective lens. A stereoscopic microscope is characterized in that it has an illumination optical system for illuminating the illumination optical system, and a reflecting member for changing the illumination angle in the illumination optical system is movably arranged.

[Embodiments of the invention] The present invention will be explained in detail based on illustrated embodiments.

FIG. 1 is a configuration diagram of an optical system according to a first embodiment, and FIG. 2 is a layout diagram of the embodiment of FIG. 1 as viewed from the subject O side. a common objective lens 1 placed in front of the subject 0;
Two reflective surfaces 2a arranged behind this objective lens 1,
Observation system prism 2 with 2b and two left and right optical axes Oa
, mirrors 3a and 3 arranged in pairs on Ob, respectively.
b, a finder light composed of zoom lens systems 4a, 4b, a beam splitter, an eyepiece, etc. (not shown)
(Subject 0 is observed stereoscopically by the examiner through the academic departments Fa and Fb.

Also, as an illumination optical system, a light source 5 and an optical axis Oc of this light source 5 are used.
Condenser lenses 6 are arranged sequentially from the light source 5 side above.
, a mirror 7 that deflects the optical path, a relay lens 8, and a movable prism 9 placed behind the objective lens l. Here, the movable prism 9 has a side surface shape that matches the V-shaped groove 2c provided on the side surface of the observation system prism 2, and has a reflective surface 9c that deflects the light from the relay lens 8 toward the objective lens l. It is designed so that it can slide along the observation system prism 2 parallel to the central axis of the objective lens l.

Since the embodiment of the present invention has the above-described configuration, the light beam from the light source 5 passes through the condenser lens 6, is reflected by the mirror 7, passes through the relay lens 8, and passes through the reflecting surface 9 of the movable prism 9.
c, the light passes through the objective lens 1 and illuminates the subject 0 from an oblique direction. The light flux emitted from the object 0 is passed through the objective lens 1.
reflection surfaces 2a and 2b of the observation optical system prism 2.
The beam is separated into two beams, reflected at positions La and Lb of mirrors 3a and 3b, and transmitted to the zoom lens system 4a.
, 4b to the funder optical systems Fa and Fb for stereoscopic observation.

Here, when the illumination system movable prism 9 is moved upward along the central axis of the objective lens l, as shown by the dotted line, the reflection position of the illumination light beam moves from Lc to Lc', and is more centered than before the movement. The illumination comes from a position close to the axis. In this way, the illumination system movable prism 9 is moved along the central axis of the objective lens l.
By continuously moving , the illumination angle with respect to the subject 0 can be continuously varied.

FIG. 3 is a configuration diagram of the optical system of the second embodiment, and FIG. 4 is a layout diagram of the optical system of the embodiment of FIG. 3 viewed from the subject O side. Note that the same reference numerals as in FIGS. 1 and 2 represent the same or equivalent members. In this embodiment, one movable prism lO serves as both an observation system prism and an illumination system movable prism, and 10a and 10b serve as the reflection surfaces of the observation system prism, and lOc serves as the reflection surface of the illumination system movable prism. is now used. and,
This movable prism 10 is movable along the central axis of the objective lens 1.

In FIG. 3, when the movable prism 10 is moved from the position indicated by the solid line to the position indicated by the dotted line, the reflection position of the illumination light beam changes to the fourth position.
The reflection position of the observation light beam is from La to La on the reflective surfaces 10a and 10b as shown in the figure from Lc to Lc' on the reflective surface 10c.
' and Lb to t and b', and both the illumination light flux and the observation light flux approach the central axis of the objective lens l at the same base line interval. In other words, the stereoscopic viewing plane and the illumination plane can be changed at the same rate.

If it is better to always change the illumination angle and the stereoscopic viewing angle at the same rate depending on the purpose of use of the stereomicroscope, the second embodiment is more convenient than the first embodiment. but,
In the case of the first embodiment, since the illumination system movable prism 9 and the observation system prism 2 can be moved simultaneously or independently, the scope of application is wide.

In the above embodiments, the observation prism is moved as a single unit, but the observation prism can also be divided into a plurality of pieces. Further, the prisms can be moved not only along the central axis of the objective lens 1, but also in a direction away from the optical axis of the objective lens 1. That is, by moving the prism away from the central axis of the objective lens 1, the baseline interval with respect to the central axis can be expanded, and in the case of the above-mentioned embodiment in which the prism is moved along the central axis of the objective lens l. Similarly, it becomes possible to adjust the baseline spacing.

Furthermore, not only the prism but also the mirrors 3a, 3b, and 7 can be moved integrally or independently in the direction of the central axis of the objective lens 1 or in the radial direction perpendicular to the central axis. For example, in FIG. 1, the illumination system movable prism 9
Even if the movable prism 9 is fixed, if the mirror 7 is moved upward along the central axis of the objective lens l, the distance between the base lines relative to the central axis of the objective lens l can be widened, and the movable prism 9 and If the mirror 7 is moved simultaneously and in opposite directions, for example, the mirror 7 is moved upward and the movable prism 9 is moved downward, it is possible to widen the baseline spacing more effectively.

[Effects of the Invention 1] As explained above, the stereomicroscope according to the present invention makes the illumination system prism or mirror movable to make the illumination angle variable, thereby improving the observation ability. By moving the observation system prism etc., more precise observation is possible.

[Brief explanation of the drawing]

The drawings show an embodiment of the stereomicroscope according to the present invention, FIG. 1 is a configuration diagram of the optical system of the first embodiment, FIG. 2 is a layout diagram as seen from the subject side, and FIG. 3 is a diagram of the second embodiment. FIG. 4 is a configuration diagram of the optical system of the embodiment, and is a layout diagram seen from the subject side. 1 is an objective lens, 2 is an observation prism, 2a, 2b
3a, 3b, 7 are mirrors, 4a, 4b are zoom lens systems, 5 is a light source, 6 is a condenser lens, 8 is a relay lens, 9 is an illumination system movable prism, 9c is a reflective surface,
10 is a movable prism, loa, tob, and 10c are reflective surfaces. Patent applicant Canon Co., Ltd. Figure 1 Figure 3

Claims (1)

[Scope of Claims] 1. A stereoscopic microscope in which a pair of left and right stereoscopic observation optical systems is arranged behind a common objective lens, comprising an illumination optical system that illuminates a subject through the objective lens; A stereoscopic microscope characterized in that a reflecting member for changing the illumination angle in the illumination optical system is movably arranged. 2. The stereoscopic microscope according to claim 1, wherein the reflective member is a prism block having a reflective surface. 3. The stereoscopic microscope according to claim 1, wherein the reflecting member is moved along the central axis of the objective lens or radially relative to the central axis. 4. The stereoscopic microscope according to claim 1, wherein a reflecting member provided in the stereoscopic observation optical system for changing the stereoscopic viewing angle is movable simultaneously with or independently of the illumination system reflecting member. 5. The reflective member of the observation optical system for changing the stereoscopic viewing angle is formed by a prism having two reflective surfaces,
The stereoscopic microscope according to claim 4, wherein the objective lens is movable along the central axis. 6. The entity according to claim 4, wherein the reflection member of the illumination optical system and the reflection member of the observation optical system are made into one prism block, and are movable along the central axis of the objective lens. microscope.