JPH11235349A - Optical observation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical observation device which allows easy and simple operations, from the adjustment of the position and angle of a lens-barrel part to magnification changes, focusing, and filter selection, while keeping eyes on eyepieces. SOLUTION: In a colposcope having an elevating handle 89 for moving or tilting, etc., of lens barrel part 52 for observation, a magnification changing handle 90, a filter changing handle 91, and a focusing handle 92 are provided between the grip parts 89a, 89b of the elevating handle 89 and the lens-barrel part 52. The elevating handle 89 is mounted on an elevating handle mounting seat 88 secured to an elevating shaft 87 and is rotatable relative to the lens- barrel part 52. The control handles 90, 91, 92 can rotate coaxially with the elevating shaft 87 and independently of one another, with their torques transmitted to a magnification changing mechanism, a filter changing mechanism, and a focusing mechanism.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operating microscope or a colposcope, or an optical observation apparatus having the functions of both.

[0002]

2. Description of the Related Art Conventionally, a colposcope has been used for observing the cervix in a magnified manner in fields such as obstetrics and gynecology. The general structure of a colposcope includes a mirror unit as a stereoscopic microscope for magnifying observation, and a mount and an arm for setting the mirror unit to a desired position and angle. By the way, since the structure of a colposcope is similar to that of an operating microscope, in recent years, a type that has both functions of a colposcope and an operating microscope and that can cope with both uses has been proposed. In this specification, a device having at least one of these functions is referred to as an optical observation device. Next, a conventional colposcope will be described with an example.

FIG. 7 shows an example of a colposcope described in Japanese Patent Publication No. 57-31900.
(A) is a front view, (B) is a side view. In the drawing, reference numeral 1 denotes a base having casters at the bottom, reference numeral 2 denotes a slide column supported to be vertically movable with respect to the base 1, and reference numeral 3 denotes a first arm supported rotatably in a horizontal plane with respect to the slide column 2. , 4
Is a second arm supported at the other end of the first arm 3 so as to be rotatable in a horizontal plane with respect to the first arm 3, and 5 is a second arm 4
It is a mirror body that has an eyepiece 6, an objective lens 7, and a magnification change handle 8 (not shown) held above.

[0004] Reference numeral 9 denotes an up / down fine movement handle provided between the mirror unit 5 and the second arm 4 for slightly moving the mirror unit 5 up and down. By rotating the lever 10 in the X direction in the figure, the mirror body 5 is delicately moved in the observation optical axis direction, and by rotating in the Y direction (vertical direction), the mirror body 5 is moved. The mirror unit 5 can be swung and swung in a horizontal plane by lowering and further turning in the Z direction (horizontal direction). In addition, the vertical moving part and each rotating part have
A stopper handle is provided to limit each movement.

[0005] When observing the vagina under the above-described configuration, the gantry 1 is moved to move the colposcope to a required position, and then the slide column 2 is moved up and down to move the mirror body to the observation section. Adjust the approximate height of 5 and fix it at the appropriate height with the stopper handle. Next, the operation of the vertical fine movement handle 9 and the Y direction operation of the fine movement lever 10 are alternately performed to adjust the vertical position and the vertical observation angle of the mirror unit 5 with respect to the observation unit.
, The first arm 3 and the second arm 4 are horizontally moved, and the fine movement lever 10 is operated in the Z direction, so that the left-right (horizontal) position and the left-right (horizontal) ) Adjust the viewing angle in the direction. Finally, by performing the X-direction operation of the fine movement lever 10 and the operation of the magnification switching handle 8, it is possible to focus on the observation unit and set the observation magnification.

In the above-described procedure, the operation of the up / down fine movement handle 9 and the Y direction operation of the fine movement lever 10 are alternately performed. Usually, the observer secures the visual field of the observation part, that is, the cervix. To hold a Cusco mirror in one hand,
This is because only one hand can be used to operate the colposcope. In this manner, since the mirror 5 can be adjusted to a desired position and angle, a desired observation unit can be magnified and observed from a desired direction.

Next, FIGS. 8 and 9 show another example of the structure of the colposcope. FIG.
(B) is a partially broken side view. 9A and 9B show the structure of the filter switching unit including the filter switching handle 18, in which FIG. 9A is a front sectional view, and FIG. 9B is a side sectional view. In FIG. 8, reference numeral 11 denotes a base on which a caster 12 is pivotally supported by a support shaft 12a at the bottom, and 13 denotes a slide column which is vertically movably supported with respect to the base 11.
Reference numeral 4 denotes a mirror portion located above the slide support 13,
The mirror section 14 includes an eyepiece 15, an objective lens 16,
It has a magnification switching handle 17 of a magnification system (not shown) and a filter switching handle 18 of an illumination system (not shown).

Reference numeral 19 denotes a mirror body 14 and a slide support 13.
The mirror elevating portion 19 is mounted between the upper and lower ends of the sliding column 13 so as to be rotatable in a horizontal plane. It is composed of a T-shaped elevating handle 21 having a rotatable elevating shaft 21a which is inserted and rotatable, and a mirror mounting portion 22 integrally fixed to the elevating shaft 21a. Reference numeral 23 denotes a focusing handle 2 which is fixed integrally with the lens mount 22.
The focusing unit can rotate the mirror unit 4 to slightly move the mirror unit 14 in the observation optical axis direction.

In the gantry 11 shown in a broken state in FIG. 8B, reference numeral 26 denotes a balance weight which can move up and down.
9, the weight equal to the sum of the focusing unit 23 and the mirror unit 14. 27 is a wire having one end connected to the slide column 13 and the other end connected to the balance weight 26;
Is a pulley whose fulcrum is supported by the inner wall of the gantry 11 and a wire 27 is hung. 29 is inserted into the inner wall of the gantry 11 and falls into the long groove 13a of the slide column 13 in the vertical direction to rotate the slide column 13 with respect to the frame 11. And 30 are rotation limiting pins that are fitted into the inner wall of the gantry 11 and fall into long grooves 26a in the vertical direction of the balance weight 26 to limit the rotation of the balance weight 26 with respect to the gantry 11. Construct a balance mechanism.

In FIG. 9, reference numeral 32 denotes a light guide having one end connected to a light source device (not shown); 33, an illumination lens positioned forward of the other end of the light guide 32 and fixed in a housing 34; An optical filter 36 positioned further forward of the filter seat 36 is a filter seat having a substantially U-shaped cross section, which supports the optical filter 35 and has both ends fixed to a pair of filter shafts 37 pivotally connected to the housing 34. The filter switching handle 18 is fixed to the filter shaft 37.

Reference numeral 38 denotes a coned disc spring held in a compressed state between a nut 39 screwed into the other filter shaft 37 and a washer 40. As shown by a broken line in FIG. In an arbitrary inclined state in which the filter seat 36 is rotated so that the filter seat 36 can be located outside the illumination light path, a frictional force for stopping the filter seat 36 is applied to the position against the gravity.

When an observation operation is performed in such a configuration, the mirror unit 14, the mirror unit 19, and the like, which are balanced with the balance weight 26, are applied by holding the elevation handle 21 and applying a vertical force. The mirror unit 14 is adjusted to a required height by moving the mirror unit 14 up and down. Next, the caster 12 is moved horizontally by applying a force to the raising handle 21 in the horizontal direction, and the colpososcope is moved horizontally. Further, by turning the raising handle 21, the vertical observation angle is adjusted. In addition, the elevation seat 20 is rotated in the horizontal direction with respect to the slide column 13 to adjust the observation angle in the left-right direction. Focus is performed. Then, the user moves his / her hand away from the elevating handle 21 and operates the magnification switching handle 17 to set the observation magnification, or operates the filter switching handle 18 to make adjustments such as moving the optical filter 35 back and forth from the illumination optical path.

The colposcope is provided with an elevating handle 21.
Is disposed close to the slide column 13, so that, for example, even if a vertical force is applied to the elevating handle 21, the elevating angle of the mirror body 14 does not change carelessly, It can only be moved up and down. or,
Only by operating the raising handle 21, the observation section can be observed from a desired position and angle.

[0014]

However, in the colpososcope according to the former conventional example, when adjusting the position and angle of the mirror unit 5, the vertical fine handle 9 and the fine lever 1 are required.
0 is alternately operated, so that the observer switches the operation of the handle 9 and the lever 10 every time the eyepiece 6 is switched.
The user had to take his eyes away from the camera and change the operation unit, which was very complicated. Therefore, especially in a group examination, in order to observe a large number of subjects at once, fatigue due to switching of the operation unit and eye fatigue when refocusing by looking into the eyepiece lens 6 are large. As a result, there has been a problem that the efficiency of mass screening requiring quick observation and diagnosis is greatly reduced.

On the other hand, in the latter conventional example, the position and angle of the mirror section 14 can be adjusted only by operating the raising handle 21, so that the above-mentioned problem can be solved. However, since the operation is performed while holding the grip of the head of the T-shaped elevating handle 21, the movement of the observer's hand can be directly changed to the elevating angle or the swinging movement of the mirror unit 14. And the mirror 14 under magnification observation
When it is desired to make a slight movement, a delicate operation is required, which is very nervous and cumbersome.
Such an operation reduces the efficiency of mass screening, as in the above-described example.

The present invention has been made in view of the above-mentioned problems, and enables a simple and quick operation from adjustment of the position and angle of a mirror unit to operations such as zooming, focusing, and filter selection without leaving an eye from an eyepiece. It is an object of the present invention to provide an optical observation device which can be performed at a time.

[0017]

SUMMARY OF THE INVENTION An optical observation apparatus according to the present invention is an optical observation apparatus having a handle for moving or tilting a mirror body for observation, wherein various adjustments provided in the optical observation apparatus are provided. At least one of the operation units for operating the means is provided between the grip part of the handle and the mirror body.

In the optical observation apparatus according to the present invention, preferably, at least a part of the grip portion of the handle is located on a center axis of an operation rotation axis of the operation portion.

In the optical observation apparatus according to the present invention, preferably, the handle is rotatably mountable with respect to the mirror body, and the rotation center axis of the handle is substantially the same as the operation rotation axis of the operation unit. It is characterized by doing.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an optical observation apparatus according to the present invention will be described below with reference to the drawings.

First, prior to the description of the present invention, a reference example of an optical observation apparatus will be described. 4, 5, and 6
FIG. 4A relates to a reference example of the optical observation apparatus.
Is a front view of the colposcope, (B) is a partially broken side view,
FIG. 5 is a cross-sectional view of a main part of the filter switching unit, and FIG. 6 is a partially cut-away side view showing the configuration of the caster mounting unit. In FIG. 4, reference numeral 42 denotes a gantry having a plurality of casters 41 attached to the bottom, 43 denotes a footrest fixed to one side surface of the gantry 42, 44 denotes an up / down sliding column supported vertically movably with respect to the gantry 42, 45 Is a horizontal slide column held at the upper end of the vertical slide column 44 so as to be rotatable in the horizontal direction and movable in the horizontal direction with respect to the column 44.

Reference numeral 46 denotes a mirror elevating portion held at one end of the horizontal slide support 45. In this mirror elevate portion 46, reference numeral 47 denotes a substantially U-shaped cross section rotatable with respect to the horizontal slide support 45 in a horizontal plane. An elevating seat 48 is horizontally inserted into both arms of the erecting seat 47 and is rotatable with respect to the elevating seat 47. A 49 is coaxially fixed to one end of the elevating shaft 48. A substantially L-shaped elevating handle, a first grip 49a is fixed to the handle 49 at a position on an extension of the elevating shaft 48, and a second grip 49b is fixed to a farther position bent at a right angle to the elevating shaft 48. Have been. Reference numeral 50 denotes a mirror mounting portion fixed to the elevation axis 48 in a direction orthogonal to the elevation axis 48.

Reference numeral 52 denotes a mirror portion held on a mirror mounting portion 50. The mirror portion 52 has an eyepiece lens 5 attached thereto.
3, an objective lens 54, a magnification changeover handle 55 (not shown), and a filter changeover handle 56 (not shown) are provided. 57 is a focusing unit which is held between the mirror mounting unit 50 and the mirror unit 52 and can slightly move the mirror unit 52 in the observation optical axis direction with respect to the mirror mounting unit 50; The mirror unit 5 provided in the unit 57
Focusing handle for two movements.

Next, in the broken portion of the gantry 42 shown in FIG. 4B, reference numeral 60 denotes a balance weight which can move up and down in the gantry 42, and the weight thereof is a vertical slide column 44, a horizontal slide column 45, a mirror body. The weight is the same as the sum of the elevation 46, the focusing unit 57, and the mirror 52. One end of the balance weight 61 is connected to the vertical slide column 44 and the other end is a balance weight 60.
62 is a pulley whose fulcrum is supported on the inner wall of the gantry 42 and the wire 61 is hung. 63 is a guide plate 44 a fixed to the lower end of the vertical slide support 44 and a vertical pulley formed on the balance weight 60. Guide hole 60 in direction
a is a guide rod that is fixed to the gantry 42 through
Thus, the rotation of the vertical slide column 44 and the balance weight 60 with respect to the gantry 42 is restricted. Note that these members are built in the gantry 42 to constitute a vertical balance mechanism.

Next, in the filter switching section shown in FIG. 5, reference numeral 65 denotes a light guide having one end connected to an illumination light source (not shown), and 66 denotes a light guide fixed to a housing 67 of the mirror section 52 in front of the other end. Lighting lens, 68
Is an optical filter located further in front of the illumination lens 66,
Reference numeral 69 denotes a filter seat that supports the optical filter 68 and has a substantially U-shaped cross section. Reference numeral 70 denotes a pair of filter shafts that are fixed to both sides of the filter seat 69 and that are pivotally attached to the housing 67. The filter switching handle 56 is fixed to the filter shaft 70. Reference numeral 71 denotes a washer interposed between the housing 67 and the other filter switching handle 72 which is screwed into a screw portion 70a formed on the other filter shaft 70. An elastic member is used as the filter seat 69, and the filter seat 69 having a shape shown by a broken line in a state where no pressure is applied at the time of assembling is screwed into the screw portion 70a of the filter shaft 70 to the filter switching handle 72, thereby forming a solid line. It is opened in a shape and held in a state of being elastically deformed. Thereby, the washer 71
A frictional force is generated between the filter seat 69 and the housing 67 so that the filter seat 69 can be stopped at an arbitrary rotation position.

In FIG. 6 showing the caster mounting portion,
74 is a foot of the gantry 42, 75 is a caster shaft whose lower end penetrating the foot 74 is fixed to the caster 41 and is rotatably held with respect to the foot 74, and 76 is a lower surface of the foot 74. A rotation limiting plate 77 fixed integrally with the caster shaft 75 in contact with the hole 76a and having a hole 76a, a gripping portion 77 at an upper portion, and a rotation limiting plate 77 at a lower portion inserted into the hole 74a of the foot portion 74. The rotation restricting pin 78 having the protrusion 77 a is wound around the rotation restricting pin 77, and both ends of the rotation restricting pin 78 press against the upper peripheral edge of the hole 74 a of the foot 74 and the protrusion 77 a to rotate the protrusion 77 a. A spring 79 that presses against the movement restricting plate 76 is provided with a notch 79 b that rises from the upper surface of the foot portion 74 and a guide surface 79 a on which the stopper pin 77 b of the rotation restricting pin 77 abuts and the rotation restricting pin 77 fits. The rotation limiting pin 77 is a stopper Rotation restricting plate 76 because the pin 77b does not project downward of the foot 74 is in contact with the guide surface 79a of the flange 79, caster axis 75 and the caster 4
1 can rotate freely, but when the stopper pin 77b is dropped into the notch 79b, the protrusion 77a can be fitted into the hole 76a of the rotation restricting plate 76, thereby the caster 4
The direction of 1 is regulated to a fixed direction.

Since the present embodiment is configured as described above, when observing the vagina or the like using this colposcope, the gantry 42 is moved to a required position and the lowering handle 4 is moved.
When the force is applied in the vertical direction while holding the first grip 49a of No. 9, the mirror body 52 and the like that are balanced with the balance weight 60 can be roughly moved up and down to a required position. Next, by applying force in the horizontal direction, the vertical
The horizontal position and angle of the horizontal slide column 45 can be adjusted by rotating the horizontal slide column 45 in the horizontal direction and moving the horizontal slide column 45 linearly in the horizontal direction. When the elevating handle 49 is rotated about the elevating shaft 48, the vertical observation angle can be roughly adjusted.
In contrast, by horizontally rotating the elevating seat 47, the observation angle in the left-right (horizontal) direction can be roughly adjusted.

Next, the user moves the hand on the elevating handle 49 to switch from the first grip 49a to the second grip 49b farther from the elevating shaft 48. When the elevating handle 49 is rotated in the up and down direction (the direction of the arrow p in FIG. 4B), the angle of rotation of the elevating shaft 48 is small with respect to the turning distance of the elevating handle 49. The body part 52 and the like are slightly rotated in the vertical direction, so that the observation angle in the vertical direction can be finely adjusted. Also, the second grip 49b
4A is rotated in the left-right direction (the direction of the arrow) in FIG. 4A, the elevating seat 47 is horizontally rotated with respect to the horizontal slide column 45, but also in this case with respect to the turning distance of the elevating handle 49. Since the rotation angle of the erection chair 47 is small, the observation angle in the left-right direction can be finely adjusted.

In connection with this operation, the focusing handle 5
8. The filter switching handle 56 and the magnification switching handle 55 are also operated in the same manner as in the conventional example, and the focus, light quantity, magnification and the like are adjusted.

If it is desired to move the gantry 42 without using a hand during observation, the gantry 42 can be moved if the observer places his or her feet on the footrest 43 and applies force. Furthermore, in the group examination, the work of repeating palpation and observation and diagnosis with a colposcope is performed alternately.
When the colpososcope is retracted during palpation, the stopper pin 77b of the rotation limiting pin 77 is dropped into the notch 79b of the flange 79, as shown in FIG.
7 is fitted into the hole 76a of the rotation restricting plate 76. In this case, since the direction in which the colposcope is retracted is determined in advance, if the caster 41 is directed in that direction, the hole 76a of the rotation restricting plate 76
As a result, the projection 77a falls easily into the hole 76a. As a result, the caster shaft 75 and the caster 41 are fixed in a certain direction, so that the colposcope moves only in a certain direction, so that the movement is easy and the movement space may be small.

Next, an embodiment of the present invention will be described with reference to FIGS.
This will be described below. FIG. 1A is a front view of a main part of a mirror unit 52 and a lens body raising unit 46 of the colposcope according to the present embodiment,
2B is a side view of the same, and FIG. 2 is a partially cutaway front view of each operation handle. In the mirror raising section 46 of FIG.
Is an elevating seat rotatable in a horizontal plane with respect to a horizontal sliding column not shown in the figure, and 87 is rotatably inserted into an erecting portion 86 a erecting from the elevating seat 86 and attached to the lower surface of the mirror body portion 52. An elevating shaft fixed to a support frame 52a having a substantially U-shaped cross section, 88 is an elevating handle mounting seat fixed to one end of an elevating shaft 87 extended outside the support frame 52a, 89
Is an approximately L-shaped elevating handle fixed to the elevating handle mounting seat 88 and having a first grip 89a and a second grip 89b fixed to the front and rear of the bent portion. It can be fixed at any angle with screws.

In FIG. 2, reference numeral 90 denotes a magnification switching handle which is fitted on the outer periphery of the elevating shaft 87 between the elevating handle mounting seat 88 and the support frame 52a and has a gear 90b formed at the other end via the cylindrical portion 90a. , 91 are filter switching handles fitted on the cylindrical portion 90a of the magnification switching handle 90 and formed with a gear 91b at the other end via the cylindrical portion 91a, and 92 is fitted on the cylindrical portion 91a of the filter switching handle 91. The gear 9 is connected to the other end via the cylindrical portion 92a.
The focusing handle 2b is formed. Each of the operation handles 90, 91 and 92 can rotate coaxially with the elevation axis 87 and independently of each other. Also, the gears 90b, 91b, 92b of the operation handles 90, 91 and 92
Stands up in a direction perpendicular to the elevation axis 87, and transmits the rotational force of each of the operation handles 90, 91 and 92 to a zooming mechanism, a filter switching mechanism, and a focusing mechanism (not shown), respectively.

The present embodiment is configured as described above, and the coarse and fine adjustment of the observation position and the angle by operating the first grip 89a and the second grip 89b of the elevating handle 89 is performed in the same manner as in the above-described reference example. Will be Then, by moving the hand on the elevating handle 89, the magnification switching handle 90, the filter switching handle 91, and the focusing handle 92 can be appropriately grasped, and the eyepiece 53
Each operation handle can also be operated without taking your eyes off.
FIG. 1 shows a case where the optical observation apparatus is used in a state in which the observation optical axis O passing through the objective lens 54 is horizontal, that is, mainly as a colposcope. As shown in FIG. When used as a surgical microscope in the vertical state, the elevating handle 89 is once removed from the elevating handle mounting seat 88, and re-mounted at a 90 ° angle around the elevating axis 87, so that the elevating handle 89 can be easily operated. What is necessary is just to arrange | position to a position.

As described above, in this embodiment, by moving the hand on the elevating handle 89, not only the first and second grips 89a and 89b but also the magnification switching handle 9
0, filter switching handle 91 and focusing handle 9
2 can also be changed directly, and the operation can be performed more reliably without removing the eye from the eyepiece 53. still,
Changing the outer shape of each operation handle or forming different knurls on the outer peripheral surface makes it easy to identify the operation handle. Further, since each operation handle is formed coaxially with the elevating handle 89, and the elevating handle 89 can be mounted at various angles with respect to the elevating handle mounting seat 88, this optical observation apparatus is used as a surgical microscope. In this case, it is possible to obtain an appropriate elevating handle position as well as to operate each operating handle in the same manner as when using it as a colposcope, and it is easy to use because the operating performance is not impaired.

[0035]

As described above, in the optical observation apparatus according to the present invention, at least one of the operation sections for operating various adjustment means provided in the optical observation apparatus is provided with the grip section of the handle. It is installed between the mirrors, and preferably, at least a part of the grip portion of the handle is on the center axis of the operation rotation axis of the operation portion, and more preferably, the handle is relative to the mirror. The handle can be attached rotatably, and the rotation center axis of the handle is configured to substantially coincide with the operation rotation axis of the operation unit, so that the observer does not interrupt the observation work, and with only one hand. Coarse and fine adjustment of the observation position and angle in the vertical and horizontal directions, as well as operations such as zooming, focusing, and filter selection can be performed, making it easier for the optical observation device to observe and reducing the fatigue of the observer in group examinations, etc. Decrease Having a practical advantage is thereby able to enhance the working efficiency.

[Brief description of the drawings]

FIG. 1 shows an embodiment of an optical observation apparatus according to the present invention, in which (A) is a front view of a main part showing a mirror unit and a mirror raising unit,
(B) is a side view similarly.

FIG. 2 is a partially cutaway front view of an operation handle unit.

FIG. 3 is a main part side view when the optical observation apparatus of the present embodiment is used as a surgical microscope.

4A and 4B show a reference example of a colposcope for describing an embodiment of an optical observation device according to the present invention, wherein FIG. 4A is a front view and FIG.

FIG. 5 is a sectional view of a main part of a film switching mechanism according to the present embodiment.

FIG. 6 is a partial cross-sectional view showing a gantry movement direction regulating mechanism according to the present reference example.

FIG. 7 shows a conventional colposcope;
(A) is a front view, (B) is a side view.

FIG. 8 shows another conventional colposcope.
(A) is a front view, (B) is a partially broken side view.

9A and 9B show a filter switching mechanism of the colposcope shown in FIG. 8, wherein FIG. 9A is a front sectional view and FIG. 9B is a side sectional view.

[Explanation of symbols]

46 Mirror body raising part 52 Mirror body part 52a Support frame 53 Eyepiece lens 54 Objective lens 86 Elevation seat 86a Standing part 87 Elevation axis 88 Elevation handle mounting seat 89 Elevation handle 89a First grip 89b Second grip 90 Magnification switching handle 90a, 91a , 92a Cylindrical part 90b, 91b, 92b Gear 91 Filter switching handle 92 Focusing handle

Claims (3)

[Claims] 1. An optical observation apparatus having a handle for moving or tilting a mirror body for observation, wherein at least one of an operation section for operating various adjustment means provided in the optical observation apparatus. An optical observation device, wherein is disposed between a grip portion of the handle and the mirror body. 2. The optical observation apparatus according to claim 1, wherein at least a part of the grip portion of the handle is located on a center axis of an operation rotation axis of the operation portion. 3. The control device according to claim 1, wherein the handle is rotatably attachable to the mirror body, and a rotation center axis of the handle substantially coincides with an operation rotation axis of the operation unit. Or the optical observation device according to claim 2.