JPS62166311A - Stereomicroscope - Google Patents

Abstract

PURPOSE:To observe a fine part while observing the whole by providing a subordinate observation optical system by a main observation optical system and allowing the both to share the same eyepieces during observation. CONSTITUTION:Light beams which are transmitted through an objective 1 and reflected beam splitters 2a and 2b are incident on beam splitters 4a and 4b through total reflecting prisms 7a and 7b, variable power lens groups 8a and 8b, and movable total reflecting prisms 9a and 9b. Then, they are reflected by the beam splitters 4a and 4b and incident on the pupils Ea and Eb of a person to be inspected through relay lenses 5a and 5b and eyepieces 6a and 6b. The movable total reflecting prisms 9a and 9b are so provided as to split optical axes between the two variable power lens groups 3a and 3b, and 8a and 8b as shown by dotted lines, and 9a' and 9b', for example, indicate a state in which their positions are shifted. Thus, the eyes Ea and Eb are shifted slightly in pupil position to observe two images which differ in magnification within the same visual field.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a stereomicroscope that allows variable magnification images of the same object to be observed within the same field of view.

[Prior Art] Stereo microscopes are widely used for medical research such as surgical examinations, industrial applications, etc., and are extremely useful in improving precision and safety during surgery.

For example, for diseases of the eye that forms a precise optical system, surgical removal is used to restore the mechanical part of the eye, but when some kind of surgery is performed on the eyeball, Sometimes it is necessary to zoom in strongly and sometimes it is necessary to zoom out and observe the front stage.

For this reason, conventionally, this type of microscope makes full use of the variable magnification function depending on the situation, but it takes time and effort to change the magnification using a zoom mechanism or turret rotation. It is impossible to do so.

[Object of the Invention] In order to meet such requirements, an object of the present invention is to provide a sub-observation optical system branched from the main observation optical system on the side of the main observation optical system, so that the images of both are separated from each other during observation. It is an object of the present invention to provide a stereoscopic microscope that allows images of different magnifications to be observed simultaneously by arranging the stereoscopic microscope so that the images are formed at the same positions.

[Summary of the Invention] The gist of the present invention for achieving the above-mentioned object is to have a stereoscopic observation optical system including a pair of left and right main variable magnification optical systems and a finder optical system, and a side view of the main variable magnification optical system. A pair of sub-observation optical systems having different magnifications from the main variable magnification optical system are provided on one side of the main variable magnification optical system, and a light guiding means is provided for guiding the image via the main and sub variable magnification optical systems to the finder optical system. This is a stereo microscope with special features.

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

FIG. 1 shows an embodiment of the present invention, in which an objective lens 1 is arranged on the reflection side of an object 0 illuminated by an illumination optical system (not shown). Beam splitter 2a that reflects part of the light to the side
・A pair of main observation optical system members consisting of 2b, first variable magnification lens group 3a and 3b, beam splitters 4a and 4b that draw in incident light from the side, relay lenses 5a and 5b, and eyepieces 6a and 6b are sequentially It is located. Further, total reflection prisms 7a and 7b are arranged on the reflection sides of the beam splitters 2a and 2b, respectively, and a first variable magnification lens group 3a*3 is arranged on the reflection sides of these total reflection prisms 7a and 7b.
A pair of sub-observation optical system members consisting of a second variable magnification lens group 8a and 8b having different magnifications from b and movable total reflection prisms 9a and 9b are arranged in sequence, and these total reflection prisms 9a
- The reflected light from 9b enters beam splitters 4a and 4b, respectively. The movable reflecting prisms 9a and 9b are movable simultaneously along the optical axis connecting the second variable magnification lens groups 8a and 8b.

Here, the first and second variable magnification lens groups 3a and 8a are
Turret rotating around axis Ca as shown in the figure) 10
The turret 1 is arranged symmetrically about the axis Ca on
Further above 0a, a pair of variable magnification lens groups 11 are arranged around axis Ca.
a, 12a are provided. In addition, the variable magnification lens group 3b
- 8b is also attached to the turret 10b together with the variable magnification lens group fib.12b (not shown). The left and right pairs of the turrets 10a and 10b can be selected by simultaneously rotating them by the same rotation angle.

The reflected light from the object 0 illuminated by a light source (not shown) passes through the objective lens 1 and then passes through the beam splitters 2a and 2b.
, variable magnification lens groups 3a and 3b, beam splitters 4a and 4
After passing through the relay lenses 5a and 5b and the eyepieces 6a*6b, the light enters the examiner's ratio pupils Ea*Eb, and stereoscopic observation is performed with the left and right eyes.

On the other hand, the beam splitters 2a and 2 pass through the objective lens l.
The light reflected by b passes through total reflection prisms 7a and 7, respectively.
b, variable magnification lens groups 8a and 8b, movable total reflection prism 9a
The light enters the beam splitters 4a and 4b again through the beam splitter 4a and 4b, passes through the relay lenses 5a and 5b, and the eyepieces 6a and 6b, and enters the examiner's pupils Ea and Eb. Movable total reflection prisms 9a and 9b
As shown by dotted lines in FIG. 1, two sets of variable power lens groups 3a
- It is provided so that the optical axes of 3b and 8a and 8b can be separated.1 For example, in FIG. 1, 9a' and 9b' are shown in a state where their respective positions have been moved. As a result, the examiner ratio E
By slightly moving the position of its pupil, aeEb can observe two images with different magnifications in the same field of view.

FIG. 3 shows another embodiment, in which the image observed by the sub-observation optical system is formed around the image observed by the main observation optical system. The observation by the main observation optical system is as shown in Figure 1, but the image by the sub observation optical system is the variable magnification lens group 8.
After passing through a and 8b, it is deflected by reflection mirrors 13a and 13b arranged on the optical axis of variable magnification lens groups 8a and 8b, and these deflected light beams are transmitted to beam splitters 4a and 4b,
Through the relay lenses 5a and 5b, the relay lens 5a
- Prism 14 provided at a position offset from the optical axis of 5b
The light enters the aI 114b, and then enters the pupil Ea@Eb of the test eye via the eyepieces 6a and 6b as in FIG. Therefore, it is possible to simultaneously observe two observation images by the main observation optical system and the sub observation optical system at different angles of view.

FIG. 4 shows an embodiment in which zoom lens groups 15a-15b and 16a and 16b are used as the variable power lens groups of the main observation optical system and the sub observation optical system, and four sets of variable power lens groups are arranged on the turret 10a and 10b. Needless to say, a fixed focus type and a zoom lens type may be mixed.

[Effects of the Invention] As explained above, the stereomicroscope according to the present invention provides a sub-observation optical system on the side of the main observation optical system so that both can be observed through the same eyepiece, thereby allowing images of different magnifications to be obtained. Since it is possible to observe the entire image at the same time, it is possible to observe even more minute details while observing the whole image, improving efficiency and preventing operational errors.

[Brief explanation of drawings]

The drawings show an embodiment of the stereomicroscope according to the present invention, and FIG. 1 is a configuration diagram thereof, FIG. 2 is a layout diagram of a variable magnification lens, and FIG.
FIG. 4 is a block diagram of another embodiment. Symbol l is an objective lens, 2.4 is a beam splitter, 3.
Reference numerals 8, 11 and 12 designate a variable magnification lens group, 6 an eyepiece, 9 a movable total internal reflection prism, 10 a turret, 13 a reflection mirror, 14 a prism, and 15.16 a zoom lens. Figure 1 Figure 3 Ea Eb ○7゜

Claims (1)

[Scope of Claims] 1. A stereoscopic observation optical system including a pair of left and right main variable magnification optical systems and a finder optical system, with the main variable magnification optical system and the magnification variable optical system located on the side of the main variable magnification optical system. A stereoscopic microscope characterized in that a pair of different sub-variable magnification optical systems is provided, and a light guide means is provided for guiding an image via the main and sub-variable magnification optical systems to the finder optical system. 2. The stereoscopic microscope according to claim 1, wherein the variable magnification optical members of the main variable magnification optical system and the sub variable magnification optical system are interchangeable. 3. The stereoscopic microscope according to claim 2, wherein the variable magnification optical system member is replaced by a turret. 4. The stereoscopic microscope according to claim 1, wherein the variable magnification optical system is a fixed focus lens or a zoom lens. 5. The stereoscopic microscope according to claim 1, wherein the light guide means has a variable light guide position on the pupil plane of the finder optical system. 6. The stereoscopic microscope according to claim 1, wherein the light guiding means has a constant light guiding position on the pupil plane of the finder optical system.