JPS6161117A - Variable stereoscopic microscope - Google Patents

Abstract

PURPOSE:To change the degree of stereoscopic observation easily by arranging a light flux polarizing means for changing the interval between the base lines of a pair of stereoscopic observation optical systems by turning them between these optical systems and an objective lens. CONSTITUTION:Light from an object point O is passed through the objective lens 1 and reflected by the reflecting surfaces 2a, 2b of a square reflection prism 2 and the reflected components are made incident upon zoom lenses 4a, 4b through mirrors 3a, 3b and sent to eyepiece optical systems Ea, Eb. When the prism 2 is turned by 90 deg., the light from the objective point O is passed through the objective lens 1 and then reflected by the reflecting surfaces 2c, 2d of the prism 2 and respective reflected components are sent to the optical systems Ea Eb through the mirrors 3a, 3b and the zoom lenses 4a, 4b respectively. The light flux axes La, Lb, Lc, Ld on the prism 2 are that on the reflecting surfaces 2a, 2b, 2c, 2d and the interval of the base lines of the Lc and Ld is set up comparatively larger than that between the La and Lb. Thus, the angle of stereoscopic observation can be changed by changing the interval between the base lines of respective light flux components on the reflecting prism 2.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a variable stereoscopic microscope capable of varying the degree of stereoscopic vision.

[Prior Art] Generally, the degree of stereoscopic vision in a stereomicroscope is achieved by observing an object by providing a baseline interval between the center rays of a pair of observation optical systems above the object. However, when observing the inside of a pore, for example, this stereoscopic vision may not be possible unless the baseline spacing is made small, and making the baseline spacing adjustable is important when using a stereomicroscope. Extremely useful.

[Object of the Invention] In response to such requirements, an object of the present invention is to provide a variable stereoscopic microscope in which the degree of stereoscopic vision can be easily varied by relatively simple means.

[Summary of the Invention] The gist of the present invention for achieving the above-mentioned object is to provide a system between a pair of left and right stereoscopic observation optical systems and an objective lens commonly used by these observation optical systems. Equipped with a beam deflection means for changing the distance between the base lines of the optical system,
The variable stereoscopic microscope is characterized in that the light beam deflecting means is supported rotatably about the optical axis of the objective lens.

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

FIG. 1 shows the main parts of a variable stereoscopic microscope according to the present invention, which is composed of a pair of stereoscopic observation optical systems that commonly use an objective lens l. Behind the objective lens 1, as shown in FIG. 2, there are four reflective surfaces 2a, 2b, 2c,
A four-sided reflective prism 2 having a diameter of 2d is arranged, and the light from the object point 0 passes through the objective lens l and then passes through the four-sided reflective prism 2.
The component reflected by the reflective surface 2a passes through the mirror 3a and enters the zoom lens 4a, and then enters the eyepiece optical lens 1.
It is now directed towards system Ea. Furthermore, the light reflected by the reflective surface 2b of the four-sided reflective prism 2 is reflected by the mirror 3b.
The light passes through the zoom lens 4b, and further heads toward the eyepiece optical system Eb.

Each reflective surface of the four-sided reflective prism 2 is inclined at 45 degrees with respect to its back surface B, but steps are provided so that the apexes of the surfaces in the horizontal and vertical directions are at different heights from the back surface B. ing. That is, the reflective surfaces 2a and 2b facing each other in the horizontal direction
The apex of is Pl, while the vertical reflecting surface 2C1
The vertex of 2d is P2. The four-sided reflective prism 2 configured in this manner is rotatably supported around the optical axis C of the objective lens 1.

FIG. 3 shows the four-sided reflective prism 2 rotated by 90 degrees from the state shown in FIG. At this time, the light from the object point O passes through the objective lens 1 and then passes through the four-sided reflective prism 2.
are reflected by the reflective surfaces 2C12d of the mirrors 3a and 2C12d, respectively.
3b, zoom lenses 4a and 4b, and then to an eyepiece optical system Ea and an eyepiece optical system Eb.

Figure 4 shows the light flux axes in the four-sided reflective prism 2'', and La, Lb, Lc, and Ld are the reflective surfaces 2a, respectively.
, 2b, 2c, and 2d, and the baseline spacing between Lc and Ld is considerably larger than the baseline spacing between La,=t and b. By rotating the four-sided reflective prism 2 in this way, it is possible to change the baseline spacing between the light beam axes on the reflective prism 2 and change the stereoscopic viewing angle.

FIG. 5 shows another embodiment of the present invention, in which the four-sided reflective prism 2 is not used, but the reflectors corresponding to the mirrors 3a and 3b shown in FIGS. 1 and 3 are recombined. It has become so.

That is, instead of the four-sided reflective prism 2, a triangular prism 5 having two left and right reflective surfaces 5a and 5b is used, and its reflection direction is directed by a pair of left and right deflection mirrors 6a and 6b, as shown in FIG. In addition, there is another pair of deflection mirrors 6 in the vertical direction perpendicular to the straight line connecting these deflection mirrors 6a and 6b.
c, 6d are placed.

Further, these deflection mirrors 6a to 6d are connected to a straight line connecting the pair of deflection mirrors 6a and 6b, respectively, and the deflection mirror 6.
The optical axis C of the objective lens passes through the intersection with the straight line connecting C16d
supported so that it can rotate around the When these deflection mirrors 6a to 6d are rotated 90 degrees as shown in FIG. 7, the straight line connecting the deflection mirrors 6C16d becomes as clear from the comparison with the straight line connecting the deflection mirrors 6a and 6b in FIG. It is somewhat shifted in the direction of the optical axis C of the objective lens. When the state shown in FIG. 7 is reached, the reflected light from the triangular prism 5 enters the deflection mirror 6C16d, so that the optical path changes, the baseline interval changes, and the degree of stereoscopic vision can be varied.

Further, instead of the four-sided reflective prism 2 shown in FIG. 1, an eight-sided reflective prism 7 as shown in FIG. 8 may be used.

This eight-sided reflective prism 7 has reflective surfaces 7a and 7e, 7b and 7.
There are four levels of steps created by the combinations of f, 7c and 7g, and 7d and 7h.
A stereoscopic image of the seeds is obtained. This kind of multifaceted prism has two
The number of surfaces can be freely selected by combining surfaces. Furthermore, it goes without saying that the number of surfaces of the combination of deflection mirrors 6a to 6d shown in FIG. 5 can be similarly freely selected.

[Effects of the Invention] As explained above, the variable stereoscopic microscope according to the present invention has the effect that the degree of stereoscopic vision can be freely adjusted by changing the combination of mirror surfaces.

[Brief explanation of the drawing]

The drawings show an embodiment of the variable stereoscopic microscope according to the present invention, and FIG. 1 shows its optical configuration, FIG. 2 is a front view of a four-sided reflective prism, and FIG. 3 shows a state from the state shown in FIG. 1. Optical configuration diagram with the four-sided reflective prism rotated 90 degrees, No. 4
The figure is an explanatory diagram of the beam axis on the four-sided reflective prism, Fig. 5 is an optical configuration diagram of the main part showing another embodiment, Fig. 6 is an explanatory diagram of the arrangement of the triangular prism and the deflection mirror, and Fig. 7 8 is an optical configuration diagram of a state in which the light beam deflection means is rotated by 90 degrees from the state of FIG. 5, and FIG. 8 is a front view of the eight-sided reflective prism. Symbol l is an objective lens, 2 is a four-sided reflective prism, 3a, 3
b is a mirror, 4a and 4b are zoom lenses, 5 is a triangular prism, 6a to 6d are deflection mirrors, and 7 is an eight-sided reflective prism. Patent applicant: Canon Co., Ltd. Figure 1 Figure 3 Figure 5 Figure 7 Figure 6 Figure 8 (7c
7Cj

Claims (1)

[Scope of Claims] 1. A light beam deflector that is located between a pair of left and right stereoscopic observation optical systems and an objective lens commonly used by these observation optical systems, and that changes the distance between the base lines of these observation optical systems by rotation. 1. A variable stereoscopic microscope, characterized in that the variable stereoscopic microscope is provided with a means for deflecting a light beam, and the light beam deflecting means is supported rotatably about the optical axis of the objective lens. 2. The variable stereoscopic microscope according to claim 1, wherein the light beam deflecting means is a rotating polygonal reflector having steps in the optical axis direction of the objective lens. 3. The variable stereoscopic microscope according to claim 1, wherein the light beam deflection means is constituted by a plurality of sets of deflection mirrors arranged at different positions in the optical axis direction of the objective lens and rotated as a unit.