JPH105244A - Surgical microscope - Google Patents

Abstract

(57) [Problem] To provide a surgical microscope for two-person observation, which solves the problems that the conventional technique of increasing the size and narrowing the working space obstructs the surgical operation. A first outgoing light for transmitting light from the objective optical system between an objective optical system and an imaging optical system, and a second outgoing light for emitting light at a certain angle with the first outgoing light.
A first prism that emits light separately from the outgoing light and a second prism that receives the second outgoing light to produce third outgoing light are arranged, the first prism is built in the first housing, and the second prism is The first housing and the second housing are connected to the first prism so that the second prism rotates about the axis of symmetry of the second emitted light with respect to the first prism;
Further, a mirror body was connected to the entrance side of the first housing, a first eyepiece tube was connected to the emission side of the first emission light of the first housing, and a second eyepiece tube was connected to the emission side of the second housing. Surgical microscope.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an imaging optical system for forming left and right eye images of an object, and a surgical microscope having an eyepiece optical system for making the left and right eye images respectively enter the left and right eyes of an observer.

[0002]

2. Description of the Related Art Today, surgery using a surgical microscope, so-called microsurgery, is sophisticated and precise. In particular, surgery is performed while two persons observe the surgical microscope, or approach the surgical site from various directions. I'm starting to do it. Conventional operating microscopes are disclosed in Japanese Patent Publication No. 6-22502, Japanese Patent Publication No. 47-41473 or Japanese Utility Model Publication No.
No. 39364 is known.

[0003]

However, the conventional surgical microscope has the following problems. First, the surgical microscope disclosed in Japanese Patent Publication No. Hei 6-22502 has a configuration in which the positional relationship between two eyepiece tubes is fixed at 180 °, and many optical members are intensively arranged at the tip of the microscope. Therefore, there has been a problem that the size of the vicinity of the objective lens becomes large and hinders the operation. Further, since the light beam incident on the objective lens is split by the 90 ° reflection type beam splitter, the distance from the lower surface of the surgical microscope to the eyepiece becomes longer, and the working space is narrowed. .

On the other hand, in the surgical microscopes of Japanese Patent Publication No. 47-41473 and Japanese Utility Model Publication No. 55-39364, the angle at which two observers look into the surgical microscope is one.
The angle is limited to 80 ° or 90 °, and there is a problem that only one observer can observe depending on the approach direction to the operative site.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a two-person observation apparatus which solves the problems of the prior art, which obstructs the operation work by increasing the size and narrowing the work space. To provide a surgical microscope for medical use.

[0006]

[Means for Solving the Problems]

(Constitution) The present invention provides a mirror body having a built-in objective optical system for entering light from an object and emitting the light as afocal light, an imaging optical system for forming an image of the afocal light to form left and right eye images of the object, and A surgical microscope having an eyepiece tube having an eyepiece optical system for causing the left and right eye images to be incident on the left and right eyes of an observer, respectively, wherein the objective optical system is provided between the objective optical system and the imaging optical system. And a part of the incident light is transmitted as first outgoing light, and another part of the incident light is reflected toward the incident surface at an angle. A first prism that has a semi-transmissive and semi-reflective surface that reflects light traveling toward the incident surface side and uses the reflected light as second emitted light; and light of second emitted light emitted from the first prism. Arranged at an angle to the axis And a first reflecting surface for reflecting the second outgoing light, and reflecting the second outgoing light reflected on the first reflecting surface again toward an outgoing surface formed on the first reflecting surface side. A second prism having a second reflection surface for causing the light reflected by the second reflection surface to be third emission light emitted from the emission surface;
The prism is housed in a first housing, the second prism is housed in a second housing, and the first housing and the second housing are arranged such that the second prism is symmetric with respect to the first prism for the second emitted light. Connecting to rotate about an axis, further connecting the mirror body to the incident side of the first housing, connecting the first eyepiece tube to the emission side of the first emission light of the first housing, The second eyepiece tube is connected to the emission side of the second housing.

(Function) Light from an object becomes afocal light via the objective optical system and enters the first prism. Part of the afocal light that has entered the first prism becomes first emission light, and enters the left and right eyes of one observer via the imaging optical system and the eyepiece optical system. Another part of the afocal light is reflected at a certain angle toward the incident surface side of the first prism, is reflected again by the first reflecting surface, becomes second emitted light, and enters the second prism. The light that has entered the second prism is reflected by the first reflecting surface of the second prism and then reflected again by the second reflecting surface to become third outgoing light, and the other light is transmitted through the imaging optical system and the eyepiece optical system. The light enters the left and right eyes of the observer. Here, when the second prism is rotated with respect to the first prism, the eyepiece tube connected to the second housing containing the second prism also rotates, and the other eyepiece tube with respect to the direction of one eyepiece tube is rotated. The direction of one eyepiece tube changes.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION

<First Embodiment> A first embodiment of the present invention will be described with reference to FIGS. (Construction) In FIG. 1, reference numeral 1 denotes a mirror body of an operating microscope, and an objective lens 2 of an objective optical system is built in a tip portion thereof. Reference numeral 3 denotes a first housing, in which a first prism 4 connected to the mirror body 1 is built. Reference numeral 5 denotes a second housing, in which a second prism 6 is built. The second housing 5 is the first housing 3
Are connected so as to rotate around an optical axis O2 described later. Reference numerals 7a and 7b denote eyepiece tubes. One of the eyepiece tubes 7a is connected to the first housing 3 and includes an imaging optical system 8a and an eyepiece optical system 9a. The other eyepiece tube 7b is connected to the second housing 5, and incorporates an imaging optical system 8b and an eyepiece optical system 9b.

Here, the direction of the center axis of the eyepiece tube 7b connected to the second housing 5 is a direction rotated by 90 ° with respect to the direction of the center axis of the eyepiece tube 7a connected to the first housing 3. Looking to the side. In addition, each eyepiece tube 7
In FIGS. 7A and 7B, an image erecting prism (not shown) is provided between the imaging optical systems 8a and 8b and the eyepiece optical systems 9a and 9b.

Next, the first prism 4 and the second prism 6,
And each optical axis will be specifically described. First, the first prism 4 has a surface on the side of the mirror body 1 as an incident surface 10 and a surface on the opposite side as a transflective surface 11. The transflective surface 11 transmits a part of the light incident from the objective optical system through the incident surface 10 as the first outgoing light, and transmits another part of the light to the incident surface 10. And the incident surface 1
The light reflected at 0 is the second outgoing light.

The optical axis O1 of the first outgoing light is
At the same time as the center axis of the left and right optical axes of the eyepiece tube 7a connected to the first housing 3. The optical axis O2 of the second emitted light is the optical axis O1 of the first emitted light.
Is formed by being deflected by the transflective surface 11 and the incident surface 10, and is arranged from the first prism 4 to the second prism 6.

The second prism 6 has a surface on the side of the eyepiece tube 7b as an exit surface 12 and a surface on the opposite side as a total reflection surface 13. The exit surface 12 is arranged perpendicular to the optical axis O1 of the first exit light and obliquely at an angle to the optical axis of the second exit light. Then, the light flux of the second outgoing light that has entered the second prism 6 is once reflected by the outgoing surface 12 of the second prism 6 and again reflected by the total reflection surface 13 of the second prism 6 to become third outgoing light, From the exit surface 12 to the eyepiece tube 7
The light enters the optical system a. The optical axis of the third emitted light is the eyepiece tube 7
b are arranged parallel to the central axis O3.

As shown in FIG. 2 as viewed from the direction of arrow A in FIG. 1, a lens support arm 14 is integrally attached to the side surface of the lens 1. The tip of the mirror support arm 14 is connected to an arm tip 15 of a well-known gantry capable of moving the mirror 1 to a desired position. And the mirror support arm 1
Numeral 4 is supported rotatably about an axis Op perpendicular to the paper surface with respect to the arm tip 15 of the gantry.

(Operation) When observing the object plane X with this surgical microscope, the light emitted from the object plane X becomes an afocal light beam through the objective lens 2 and enters the first prism 4 from its reflection surface 10. I do. This incident light beam is applied to the first prism 4
Are divided into a first outgoing light transmitting therethrough and a second outgoing light reflecting therethrough.

The partial luminous flux of the first outgoing light transmitted through the semi-transmissive and semi-reflective surface 11 is transmitted to two sets of imaging optical systems 8 in the eyepiece tube 7a
The images are formed on the image forming plane Y via a and 8a to form left and right eye images of the object. The left and right eye images are incident on the left and right eyes of one observer via the respective eyepiece optical systems 9a.

On the other hand, the light beam reflected by the transflective surface 11 is reflected by the incident surface 10 of the first prism 4 and is reflected by the second prism.
The emitted light becomes incident on the second prism 6 of the second housing 5. The light beam that has entered the second prism 6 is once reflected on the exit surface 12 of the second prism 6 and is reflected again on the total reflection surface 13 of the second prism 6 to become third emission light, similarly to the first emission light. Then, images are respectively formed on the image forming plane Y via two sets of image forming optical systems 8b and 8b in the eyepiece tube 7b to form left and right eye images of the object. The left and right eye images are each eyepiece optical system 9b
And enters the left and right eyes of another observer.

Here, the relative angle at which the two observers look into the eyepiece tubes 7a and 7b around the axis O1 is 90 °, but the correct orientation and correct parallax are appropriate for each observer to work. Left and right eye images are provided.

Next, in order to change the state of observing the object from above as shown in FIG. 1 to the state of observing the object from the lateral direction, as shown in FIG.
By rotating the mirror support arm 14 about the axis Op with respect to the axis 5 and rotating the second housing 5 with respect to the first housing 3 about the optical axis O2 of the second emitted light, FIG. 2
3 can be changed to the state shown in FIG. FIG. 4 shows the state of FIG. 3 viewed from the direction of arrow B in FIG.

That is, the two observers look sideways at the eyepiece tubes 7a and 7b side by side, and in this case,
The second housing 5 has an optical axis O with respect to the first housing 3.
2 around 90 °, and the eyepiece tube 7b rotates at 90 ° around the central axis with respect to the second housing 3. That is, the second housing 5 and the eyepiece tube 7b are rotated in the opposite directions by the same amount. Therefore, the same right and left eye images of correct parallax are provided to each observer.

(Effect) In the present embodiment, the first housing 3
In contrast, the observation from the upper direction and the observation from the lateral direction can be changed with a simple configuration in which the second housing 5 is simply rotatably connected. Although the variable power optical system is omitted in the present embodiment, for example, between the objective lens 2 and the first prism 4, between the first prism 4 and the eyepiece tube 7a, between the second prism 6 and the eyepiece tube 7b, and the like. Zooming can be performed by inserting a well-known drum or turret type zoom lens.

Further, if the first housing 3 is connected to the mirror body 1 so as to rotate the first prism 4 about the symmetry axis O1 of the left and right optical axes, one of the eyepiece tubes 7a is rotated around the other of the eyepiece tube 7a. The position can be selected by rotating the eyepiece tube 7a. For example, observation from more directions becomes possible by changing to the state shown in FIG. 5 or FIG.

<Second Embodiment> A second embodiment of the present invention will be described with reference to FIGS. (Construction) In FIG. 7, reference numeral 20 denotes a mirror of an operating microscope, and an objective lens 21 is built in at the tip of the mirror. The first afocal lens group 2 of the afocal variable power optical system is located in the mirror body 20 on the emission side of the objective lens 21.
2 and the second afocal lens group 23
It is provided so as to be parallel to one optical axis O3. First
Both the afocal lens group 22 and the second afocal lens group 23 are symmetrically arranged, and each symmetric central axis is common.

When the objective lens 21, the first afocal group 22, and the second afocal group 23 are viewed from above, the first afocal group 22 and the second afocal group 22, as shown in FIG.
The afocal groups 23 are arranged point-symmetrically. That is, the line connecting the center of the first afocal group 22 is orthogonal to the line connecting the center of the second afocal group 23, and the point of symmetry coincides with the intersection. This intersection also coincides with the optical axis O3 of the objective lens 21.

A first housing 25 is connected to the mirror body 20, and a first prism 2 is provided in the first housing 25.
6 is built-in. A second housing 27 is connected to the first housing 25 so as to rotate about an optical axis O4 described later. The second housing 27 includes a second prism 28 therein. The eyepiece tube 7 is provided in the first housing 25 and the second housing 27 similarly to the first embodiment described above.
a and 7b are connected.

Next, the first prism 26 and the optical axis will be specifically described. The first prism 26 has an entrance surface 29,
It has a transflective surface 30 and an exit surface 31. The second prism 28 has an emission surface 32 and a total reflection surface 33. The optical axis O3 of the objective lens 21 is simultaneously the symmetric axis of the left and right optical axes of the eyepiece tube 7a connected to the first housing 25, and is also the optical axis of the first outgoing light emitted from the first prism 26. . Then, the transflective surface 30
Transmits a part of the light incident from the objective optical system side as the first outgoing light, and reflects another part of the light toward the incident surface 29 at a certain angle. Further, the light reflected on the incident surface 29 is reflected on the exit surface 31, is directed again to the incident surface 29, is reflected on the incident surface 29, and becomes the second exit light. In other words, the optical axis O4 of the second outgoing light is formed by the optical axis O3 being deflected from the transflective surface 30 by the entrance surface 29, the exit surface 31, and again the entrance surface 29.

Although not shown, the lens body 20 is held by a lens body support arm and an arm of a gantry as in the first embodiment. (Operation) When observing the object plane X with this surgical microscope,
The light emitted from the object plane X becomes an afocal light beam via the objective lens 21 and enters the first afocal lens group 22 and the second afocal lens group 23, respectively. The light incident on each of the afocal lens groups 22 and 23 passes through several lenses necessary for zooming inside the
The light again becomes four afocal light beams, and the first prism 26
Incident inside. The first outgoing light transmitted through the transflective surface 30 of the first prism 26 and the second outgoing light
And outgoing light.

The light beam from the first afocal lens group 22 of the first outgoing light transmitted through the transflective surface 30 forms an image on the image plane Y via the image forming optical system 8a in the eyepiece tube 7a. Then, create left and right eye images of the object. The left and right eye images are scaled by the movement of the lenses in the first afocal lens group 22. The left and right eye images enter the left and right eyes of the observer via the eyepiece optical system 9a.

On the other hand, the light beam reflected by the semi-transmissive and semi-reflective surface 30 is applied to the entrance surface 29 and the exit surface 3 of the first prism 26.
1, again reflected in order on the incident surface 29 to become second emission light,
The light enters the second prism 28 of the second housing 27. The light beam incident on the second prism 28 is once
8, the light is reflected by the total reflection surface 33 of the second prism 28 again to become third emission light. Of these, the light flux from the second afocal lens group 23 passes through the imaging optical system 8b. The image is formed on the image plane Y via the camera, thereby forming left and right eye images of the object. The left and right eye images are scaled by the movement of the lenses in the second afocal lens group 23. The left and right eye images enter the left and right eyes of another observer via the eyepiece optical system 9b and are observed.

Here, the relative angle at which the two observers look into the eyepiece tube 7a and the eyepiece tube 7b is 90 °, but the first afocal lens group 22 and the second afocal lens group 23 provides the right and left eye images with correct orientation and correct parallax appropriate for each observer to work.

Next, in order to observe the object from the lateral direction as in the first embodiment, the object can be transformed into the state shown in FIG. 3 as described above. That is, the two observers look sideways at the eyepiece tubes 7a and 7b side by side, and give the respective observers the same, correct orientation and correctness via the first afocal lens group 22. Left and right eye images of parallax are provided.

(Effect) In the present embodiment, the same operation and effect as those of the first embodiment can be obtained even though it is in the form of a conventional surgical microscope in which an afocal lens group of an afocal variable power optical system is built in a mirror body. In addition, by increasing the number of reflections in the first prism 26, the distance between the two observers can be increased, so that the surgical operation can be easily performed.

Third Embodiment A third embodiment of the present invention will be described with reference to FIGS. (Configuration) The third embodiment differs from the above-described second embodiment only in the configuration of the mirror body, and therefore, the description of the components other than the mirror body is omitted.

(Construction) In FIG. 9, reference numeral 40 denotes a mirror of an operating microscope, which is provided with an objective lens 41 and an afocal lens group 42 of an afocal variable power optical system. O5 is the optical axis of the objective lens 41, the axis of symmetry of the left and right optical axes of the eyepiece tube 7 connected to the first housing 25, and the light of the first emission light emitted from the first prism 26. It is also an axis.

(Operation) When observing the object plane X with this surgical microscope, light emitted from the object plane X is reflected by the objective lens 41.
And becomes an afocal light beam, and enters the afocal lens group 42. The light that has entered the afocal lens group 42 passes through several lenses necessary for zooming, and then forms a single afocal light flux again and enters the first prism 26. Thereafter, as in the first and second embodiments, the right and left eye images of the correct orientation and correct parallax are provided to the respective observers.

(Effect) In this embodiment, since the objective optical system is composed of a single objective lens 41 and a single afocal lens group 42, the effect of the second embodiment described above is obtained as shown in FIG. In addition, there is an effect that another observer can observe from all directions around the optical axis O5.

<Fourth Embodiment> A fourth embodiment of the present invention will be described with reference to FIGS. (Configuration) The fourth embodiment differs from the above-described third embodiment only in the optical path portion after the first outgoing light passing through the semi-transmissive and semi-reflective surface 11 of the first prism 4, and therefore, the other description is omitted. .

(Construction) In FIG. 11, reference numeral 51 denotes a third housing containing a third prism 52. The third housing 51 is connected to the first housing 25 so as to rotate about the optical axis O5. ing. The eyepiece tubes 7a, 7b connected to the first and second housings 25, 27 in the above-described third embodiment are connected to the second housing 27 and the third housing 27, respectively.
The housing 51 is connected to rotate around optical axes O6 and O7 described later.

Next, the third prism 52 and the optical axes O 6,
O7 will be described. The third prism 52 has a first total reflection surface 53 and a second total reflection surface 54. And the third
The optical axis O6 emitted from the prism 52 is the optical axis O5.
Is an optical axis of a light beam formed by being deflected by the first total reflection surface 53 and the second total reflection surface 54. O7 is the optical axis of the light beam emitted from the second prism 28.

(Operation) The light flux of the first outgoing light incident on the third prism is converted into the first total reflection surface 53 and the second total reflection surface 5.
The light is reflected by the light 4 and emitted, and enters the left and right eyes of the observer via the eyepiece tube 7a.

In order to change the state in which the object is observed from directly above as shown in FIG. 11 to the state in which the object is obliquely observed from above, the mirror support arm 14 is attached to the arm tip 15 of the gantry. And the second housing 2
7. When the eyepiece tubes 7a, 7b are rotated about the optical axes O7, O6 with respect to the third housing 51, the state changes to the state shown in FIG. That is, the line connecting the left and right optical axes of the two observers is kept horizontal.

(Effect) The present embodiment employs two eyepiece tubes 7
Since a and 7b are made rotatable around optical axes O6 and O7 perpendicular to the optical axis O5, surgery can be performed in a comfortable posture even when the object is tilted and observed from above. Since it is possible to observe O5 under almost the same conditions, it is easy to perform a surgical operation.

In the present embodiment, the third prism 52 is formed by pentarhythm. However, it is needless to say that the same effect can be obtained with another two-time reflecting prism. [Supplementary Notes] (1) A mirror body having a built-in objective optical system that receives light from an object and emits it as afocal light, an imaging optical system that forms the afocal light to form left and right eye images of the object, and In an operating microscope having an eyepiece tube having a built-in eyepiece optical system that causes the left and right eye images to be incident on the left and right eyes of the observer, respectively, between the objective optical system and the imaging optical system, from the objective optical system And a part of the incident light is transmitted as first outgoing light, and another part of the incident light is reflected toward the incident surface at an angle. A first prism that has a semi-transmissive and semi-reflective surface and reflects light traveling toward the incident surface side and uses the reflected light as second emission light; and an optical axis of second emission light emitted from the first prism Are placed diagonally at an angle to And a first reflecting surface for reflecting the second outgoing light, and reflecting the second outgoing light reflected on the first reflecting surface again toward an outgoing surface formed on the first reflecting surface side. A second prism having a second reflection surface, the light being reflected by the second reflection surface being a third emission light emitted from the emission surface, and the first prism being built in the first housing; The second prism is housed in a second housing, and the first housing and the second housing are arranged so that the second prism rotates about the axis of symmetry of the second emitted light with respect to the first prism. Connected, further connected the mirror body to the entrance side of the first housing, connected the first eyepiece tube to the exit side of the first exit light of the first housing, and connected the first eyepiece tube to the exit side of the second housing. Two eyepiece tubes are connected. Surgical microscope.

(2) The surgical operation according to (1), wherein the first housing is connected to the mirror body so that the first prism rotates around a symmetry axis of the left and right optical axes of the objective optical system. microscope. According to this configuration, when the first prism is rotated around the left and right optical axes of the objective optical system with respect to the mirror body, the first housing containing the first prism, the second housing connected thereto, Further, the eyepiece tube connected thereto also rotates, and in addition to the operation of (1), the direction of the other eyepiece tube relative to the direction of one eyepiece tube is changed at another point.

(3) The objective optical system is constituted by a single objective lens and two afocal lens groups of an afocal variable power optical system having a common symmetric axis. 2) Surgical microscope. According to this configuration, the first prism is rotated, and the observation light (the left and right eyes of the observer) is applied to the left and right eyes of the observer at a position where the optical axis of one of the two afocal lens groups and the optical axis of the other eyepiece tube coincide. (Light from an object) is incident.

(4) The operating microscope according to (1) or (2), wherein the objective optical system is constituted by a single objective lens and a single afocal variable power optical system. . According to this configuration, even if the first prism is rotated, the partial luminous flux of the single afocal lens group is imaged by the imaging optical system, and the left and right eyes of the observer are positioned at all positions of the other eyepiece tube. Has the effect that observation light (light from an object) is incident on the object.

(5) The first outgoing light of the first prism is reflected twice between the first housing and the eyepiece tube connected to the first housing and is deflected at right angles to produce fourth outgoing light. A third prism is arranged, and the third housing is connected to the first housing so that the third prism rotates about the optical axis of the first emission light with respect to the first prism. The third outgoing light is also set to emit at right angles to the first outgoing light (1).
The surgical microscope according to (4).

(6) The surgical microscope according to (5), wherein the third prism is constituted by a pentaprism.
According to the configurations of (5) and (6), a part of the afocal light incident on the first prism becomes the first outgoing light and is incident on the third prism. The light that has entered the third prism is reflected twice and deflected at right angles to become fourth emission light, and enters the left and right eyes of one observer via the imaging optical system and the eyepiece optical system. Here, when the third prism is rotated about the optical axis of the first emitted light with respect to the first prism, the third housing containing the third prism and the eyepiece tube connected thereto are also moved. It turns, and in addition to the effect of (2), the direction of one eyepiece tube changes at another point. The angle at which the two observers look into the surgical microscope can be freely set.

(7) A mirror body having a built-in objective optical system for receiving light from an object and emitting it as afocal light, an imaging optical system for forming an image of the afocal light to form left and right eye images of the object, and In an operating microscope having an eyepiece tube having a built-in eyepiece optical system that causes the left and right eye images to be incident on the left and right eyes of the observer, respectively, between the objective optical system and the imaging optical system, from the objective optical system A first prism having a semi-transmissive / semi-reflective surface that transmits a part of the light as a first emission light and reflects another part of the light as a second emission light, and a second prism from the first prism. A reflecting surface for receiving the outgoing light and reflecting the second outgoing light, and a second prism having an outgoing surface for emitting the light reflected by the reflecting surface as third outgoing light are arranged, and the first prism is Built in the first housing, the second plug The first housing and the second housing are connected to the first prism such that the second prism rotates about the axis of symmetry of the second emitted light, and the first housing and the second housing are connected to the first prism. The first housing is connected to the mirror on the incident side of the first housing, the first eyepiece tube is connected to the emission side of the first emission light of the first housing,
A surgical microscope, wherein a second eyepiece tube is connected to an exit side of a housing.

(8) The first prism has a reflecting surface for reflecting the first outgoing light reflected on the transflective surface, and the second prism first receives the second outgoing light from the first prism. And a second reflecting surface for reflecting the light reflected by the first reflecting surface toward the light exit surface. The surgical microscope according to (7), wherein the microscope is connected so as to rotate about a symmetry axis of the third light emitted from the prism.

(9) In the first prism, the number of reflecting surfaces, including the semi-transmissive and semi-reflective surfaces, for reflecting the first outgoing light and the number of reflecting surfaces of the second prism are the same, odd or even. (8) The surgical microscope according to (8), wherein the number is a number.

[0051]

As described above, according to the present invention, the luminous fluxes of the two observers are divided by the first prism disposed above the objective optical system. Since a member that occupies a space such as a 90 ° reflection type beam splitter is not required, a space for the entire luminous flux between the mirror body and the eyepiece tube is not required, and the working space is expanded. Furthermore, since the housing to which the eyepiece tube is connected is rotatable around each optical axis, the angle at which two observers look into the surgical microscope can be set in various ways, and a posture that facilitates work can be taken. it can.

[Brief description of the drawings]

FIG. 1 is a front view of a surgical microscope according to a first embodiment.

FIG. 2 is a side view of the surgical microscope viewed from the direction of arrow A in FIG.

FIG. 3 is a side view showing a state in which the posture of the surgical microscope is changed.

FIG. 4 is a bottom view of the surgical microscope viewed from the direction of arrow B in FIG. 3;

FIG. 5 is a view in which the operating microscope is changed to another state.

FIG. 6 is a view in which the operating microscope is changed to another state.

FIG. 7 is a front view of a surgical microscope according to a second embodiment.

FIG. 8 is a plan view of the internal structure of the mirror body of the surgical microscope according to the second embodiment.

FIG. 9 is a front view of a surgical microscope according to a third embodiment.

FIG. 10 is a front view of the operating microscope according to the third embodiment in a different posture.

FIG. 11 is a front view of a surgical microscope according to a third embodiment.

FIG. 12 is a side view of the surgical microscope according to the third embodiment in a different posture.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Mirror of surgical microscope, 2 ... Objective lens of objective optical system, 3 ... First housing, 4 ... First prism, 5 ... Second
Housing 6, 6 second prism, 7a, 7b eyepiece tube, 8a, 8b imaging optical system, 9a, 9b eyepiece optical system, 10 incident surface, 11 semi-transmissive semi-reflective surface, 12 emission surface , 13 ... Total reflection surface, O1 ... Optical axis, O2 ... Optical axis, O3 ...
Central axis.

Claims (1)

[Claims] A mirror body having a built-in objective optical system for receiving light from an object and emitting the light as afocal light; an imaging optical system for forming an image of the afocal light to form left and right eye images of the object; In a surgical microscope having an eyepiece tube incorporating an eyepiece optical system that causes an eye image to be incident on the left and right eyes of an observer, between the objective optical system and the imaging optical system, An incident surface on which light is incident, and a semi-transmissive semi-reflection that transmits a part of the incident light as first outgoing light and reflects another part of the incident light toward the incident surface at an angle. A first prism having a surface and reflecting light traveling toward the incident surface side and using the reflected light as a second emission light; and an optical axis of a second emission light emitted from the first prism. Placed diagonally at an angle and in front A first reflection surface for reflecting the second emission light, and a second reflection for reflecting the second emission light reflected on the first reflection surface again toward the emission surface formed on the first reflection surface side A second prism having a surface and having the light reflected by the second reflection surface as a third emission light emitted from the emission surface; and the first prism being built in a first housing, 2
The prism is housed in the second housing, and the first housing and the second housing are connected to the first prism so that the second prism rotates around the axis of symmetry of the second output light. The mirror body is connected to an incident side of the first housing, a first eyepiece tube is connected to an emission side of the first emission light of the first housing, and a second eyepiece tube is connected to an emission side of the second housing. A surgical microscope, characterized by being connected to a microscope.