JP3869087B2 - Microscope illumination optics - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a microscope illumination optical system used in a microscope.
[0002]
[Prior art]
In the microscope, objective lenses having different magnifications are widely used from low magnification to high magnification. When using these objective lenses with different magnifications while quickly converting from low magnification to high magnification, it is difficult to uniformly and well illuminate the sample field corresponding to a wide range of objective lens magnifications with a single condenser lens. It is.
[0003]
That is, a high numerical aperture objective lens requires a large numerical aperture, whereas a low magnification objective lens requires a large field of view. Therefore, when the magnification width of the objective lens to be used is large, it is necessary to switch the condenser lens by some switching means.
[0004]
Conventionally, as a switching method of this condenser lens, (1) a method of removing the front lens portion (tip portion) of the condenser lens from the illumination optical path, (2) a method of adding another lens to the lower illumination optical path of the condenser lens, (3) There is a method of removing a front lens portion of a condenser lens from the illumination optical path and adding a new lens to the optical path at the same time.
[0005]
Specific examples thereof are disclosed in a first known example (Japanese Patent Publication No. 61-34126) and a second known example (Japanese Patent Laid-Open No. 63-183414). However, these methods are limited to the objective lens having a low magnification of about 1.25 times, and it is impossible to cope with a magnification of 1.25 or less, particularly an extremely low magnification of 1 or less. It was.
[0006]
Furthermore, when the front lens portion of the condenser lens is removed from the optical path, the aperture stop position and the front focal position of the illumination lens are shifted, and the aperture stop does not function.
[0007]
Conventionally, there are three types of condenser lens groups, and by switching these, a configuration capable of dealing with a 0.5 × objective lens to a 100 × objective lens is disclosed in the third known example (Japanese Patent Laid-Open No. Hei 9). -33820). This is because a high-magnification condenser lens group corresponding to an objective lens magnification of 10 to 100 times, a low-magnification condenser lens group corresponding to an objective lens magnification of 2 to 4 times, and an objective lens magnification An extremely low magnification condenser lens group corresponding to 0.5 to 1 times is provided, and the illumination optical axis and the optical axis of each condenser lens group are arranged in the same plane. The illumination optical axis and the optical axis of each condenser lens group Are arranged so as to intersect with each other at one point, a rotation axis orthogonal to the optical axis plane is provided at the intersection, and each capacitor group is rotated by this rotation axis to perform switching.
[0008]
[Problems to be solved by the invention]
However, in the configuration of the third known example, since the optical axes of the three types of condenser lens groups are configured in the same plane, a certain spatial space is required in the optical path near the rotation axis. This is a limitation in optimizing the illumination performance of each condenser lens group, and there is a drawback that the aperture stop cannot be configured inside or in the vicinity of the condenser lens group.
[0009]
For this reason, in the third known example, a collector lens group and an intermediate lens group are arranged so as to form a light source image on a surface conjugate with the front focal position of the condenser lens group, and an aperture stop is provided on the light source image surface. As a configuration.
[0010]
However, in such a configuration, the aperture stop position in the space is positioned at the base portion of the microscope body, and in order to apply the condenser lens group according to the third known example to a general microscope, the microscope body An aperture stop must be added to the base of the.
[0011]
The present invention has been made on the basis of the above situation, and can deal with a wide range of magnifications of the objective lens by a simple switching means, and particularly can cover a range of magnification of 1x or less of the objective lens, An object of the present invention is to provide an illumination optical system for a microscope that can be applied without significant modification of the microscope body.
[0012]
[Means for solving the problems]
In order to achieve the above object, the invention corresponding to claim 1 provides a microscope main body with a turret rotatable about an axis parallel to the optical axis, and a high-magnification condenser lens group and a low-magnification condenser in the turret. With lens group Capacitor lens for extremely low magnification Each of the groups is arranged, and by rotating the turret, each condenser lens group can be selectively inserted into the illumination optical path, and the high magnification is provided by a mechanism that moves up and down in the optical axis direction provided on the outer peripheral side of the turret. The microscope illumination optical system is characterized in that the condenser lens group for low magnification and the condenser lens group for low magnification move independently in the optical axis direction as the turret rotates.
[0013]
According to the invention corresponding to claim 1, when the high-magnification condenser lens group or the low-magnification condenser lens group is inserted into the illumination optical path by rotating the turret, the condenser lens group is moved up and down in the optical axis direction. It can be moved to the normal illumination position by the mechanism, and each condenser lens group is arranged independently, so there are few restrictions on the lens configuration, and a lens configuration with optimum performance for each magnification can be achieved, and high magnification The condenser lens group and the low-magnification condenser lens group move independently in the direction of the optical axis, so that it is easy to avoid interference with other components of the microscope, such as the stage, and a simple turret that can be rotated. By means of this, it is possible to cope with a wide range of magnifications of the objective lens from extremely low magnification to high magnification.
[0014]
According to the invention corresponding to claim 1, when the turret is rotated to remove the high-magnification condenser lens group or the low-magnification condenser lens group from the illumination optical path, the condenser lens group is provided on the microscope stage. Since it is moved to a position where it does not interfere with the stage and the stage receiver within the range of the opening hole formed at the lower part and the stage receiver, there is no interference with the stage etc. even if the rotation angle of the turret increases. The condenser lens group can be easily switched.
[0015]
In addition, since the condenser lens group for extremely low magnification has a long focal length, it can be fixed in the turret that does not interfere with the stage or the like.
[0016]
The invention corresponding to claim 2 is the microscope illumination optical system according to claim 1, wherein the mechanism for vertically moving in the optical axis direction is constituted by a single fixed cam.
[0017]
According to the invention corresponding to claim 2, since the fixed cam for moving the high-magnification condenser lens group and the low-magnification condenser lens group in the optical axis direction can be shared by one, the cost can be reduced. It becomes.
[0018]
According to a third aspect of the present invention, there is provided a front focal position of the high-magnification condenser lens group and the low-magnification condenser lens group. Adjust opening 3. The illumination optical system for a microscope according to claim 1, wherein each possible aperture stop is provided independently so as to move in the optical axis direction integrally with each condenser lens group.
[0019]
According to the invention corresponding to claim 3, an aperture stop can be configured independently for each of the high-magnification condenser lens group and the low-magnification condenser lens group, and illumination is performed at each magnification of the objective lens without remodeling the microscope body. The opening can be adjusted.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
<First Embodiment>
FIG. 1 is a longitudinal sectional view showing only a main part of the first embodiment, FIG. 2 is a top view of a part of FIG. 1, and FIG. 3 is along B-O-B ′ in FIG. FIG. 4 is a development view of the cam groove of the fixed frame in FIG. 1.
[0021]
(Constitution)
In the figure, reference numeral 100 denotes a microscope main body, and a stage receiver 101 is fixed to a focusing mechanism mechanism (not shown) included in the microscope main body 100 so as to be focused. A stage 102 on which the sample 103 is placed is fixed to the upper part of the stage receiver 101. An opening 102 a is provided at the lower part of the stage 102.
[0022]
In the base portion of the microscope main body 100, an intermediate optical system including a light source 104, a condenser lens 105, an intermediate lens 106, a field stop (FS) 107, and a mirror 108 is accommodated. The illumination light beam emitted from the light source 104 passes through the intermediate optical systems 105, 106, 107, and 108, and condenser lens groups 16 and 17 (to be described later) housed in a condenser turret 12 that is rotatably disposed below the stage 102. 18, the sample 103 placed on the upper surface of the stage 102 is illuminated, and a sample image can be observed by an objective lens and an eyepiece lens (not shown) arranged above the sample 103.
[0023]
The capacitor holder body 1 is fixed to the stage receiver 101 so as to be detachable by an ant mechanism. The capacitor holder body 1 is provided with a moving holder 2 that can be moved up and down by an dovetail guide. A rack 4 is fixed to the moving holder 2, and a pinion 3 that meshes with the rack 4 is rotatable on the capacitor holder body 1. The focusing handle 5 and 6 are fixed to the pinion 3, and the pinion 3 is rotated by rotating the focusing handle 5 and 6, and the rack 4 meshed with this is moved up and down. The moving holder 2 is configured to move up and down.
[0024]
A mechanism for moving the condenser lens group up and down in the optical axis direction, for example, a fixed frame 7 constituting a fixed cam is attached to the movable holder 2 so as to be movable in the horizontal direction. A plunger 8 attached to the movable holder 2. The centering screws 10 and 11 move in the horizontal direction.
[0025]
A shaft 13 is fixed to the fixed frame 7, and bearings 14 and 15 are attached to the shaft 13. A substantially cylindrical capacitor turret 12 is rotatably supported by the bearings 14 and 15. The condenser turret 12 includes a high-magnification condenser lens group 16, a low-magnification condenser lens group 17, and an extremely low-magnification condenser lens group 18, which are distances from the rotational axis of the condenser turret 12, that is, from the axis 13 to each optical axis. Are arranged in an arc shape so as to be the same. The condenser turret 12 is provided with click grooves 12 a, 12 b, and 12 c corresponding to the positions where the condenser lens groups 16, 17, and 18 are inserted in the illumination optical path, and the click device fixed to the fixed frame 7. 19 is configured to stop the click.
[0026]
Here, the high-magnification condenser lens group 16 used corresponds to an objective lens magnification of 10 to 100 times, and the low-magnification condenser lens group 17 corresponds to an objective lens magnification of 1.25 to 4 times, Further, the condenser lens group 18 for extremely low magnification corresponds to a magnification of 0.5 × for the objective lens, and the irradiation field (illumination field) of the condenser lens group 18 for extremely low magnification has a diameter of 53 mm.
[0027]
The high-magnification condenser lens group 16 includes lenses 51 and 52 and lenses 53, 54, and 55. The lenses 51 to 55 are fixed to the high-magnification lens frames 56, 57, and 58. ˜58 are fixed integrally with each other.
[0028]
The high-magnification lens frame 56 is fitted to the condenser turret 12 so as to be slidable in the optical axis direction. A cam pin 59 is fixed to the high-magnification lens frame 56, and the cam pin 59 is connected to the condenser turret 12 with the optical axis. The long pin 12x provided in parallel is slidably fitted, and the cam pin 59 is slidably fitted in a cam groove 7a provided in the fixed frame 7.
[0029]
An iris diaphragm 60 is provided at the front focal position of the lenses 53, 54, and 55 of the high-magnification condenser lens group 16, and a diaphragm adjustment ring 61 is provided between the high-magnification lens frames 56 and 57 so as to be rotatable. The iris diaphragm 60 can be adjusted by rotating 61.
[0030]
A diaphragm plate 62 having a U-shaped hole 62 a is fixed to the diaphragm adjustment ring 61, and the U-shaped hole 62 a is fixed to the diaphragm plate 21 fixed to the diaphragm operating ring 20. 22 is slidably fitted. The cover 24 is fixed to the capacitor turret 12, and the high-magnification lens frame 56 is biased downward by a spring 63 supported by the cover 24.
[0031]
The aperture operation ring 20 is rotatably fitted to the condenser turret 12 and is supported at a plurality of locations by a support member 23 fixed to the condenser turret 12.
[0032]
The low-magnification condenser lens group 17 includes lenses 71 and 72 and lenses 73, 74, and 75. The lenses 71 to 75 are fixed to the low-magnification lens frames 76, 77, and 78. The lens frames 76 to 78 are fixed integrally with each other. The low-magnification lens frame 76 is fitted to the condenser turret 12 so as to be slidable in the optical axis direction. A cam pin 79 is fixed to the low-magnification lens frame 76, and the cam pin 79 is parallel to the condenser turret 12 and the optical axis. It is slidably fitted in the long hole 12y formed in. The cam pin 79 is slidably fitted in a cam groove 7 a formed in the fixed frame 7.
[0033]
An iris diaphragm 80 is disposed at the front focal position of the lenses 73, 74, and 75 of the low-magnification condenser lens group 17, and a diaphragm adjustment ring 81 is rotatably provided between the low-magnification lens frame 76 and 77. Thus, the iris diaphragm 80 can be adjusted by the rotation of the diaphragm adjustment ring 81.
[0034]
A diaphragm plate 82 having a U-shaped hole 82 a is fixed to the diaphragm adjusting ring 81, and the U-shaped hole 82 a is a diaphragm shaft fixed to the connecting plate 25 fixed to the diaphragm operating ring 20. 26 is slidably fitted. The low-magnification lens frame 76 is urged downward by a spring 83 supported by a cover 24 fixed to the condenser turret 12.
[0035]
As shown in FIG. 4, the cam groove 7a formed in the fixed frame 7 is configured such that the high-power lens group 16 and the low-power lens group 17 are each in the normal illumination position when inserted into the illumination light path. The inclination of the cam groove 7a is such that when the high-magnification condenser lens group 16 and the low-magnification condenser lens group 17 are inserted into and removed from the illumination optical path, the front lens portion of each condenser lens group is Within the range of the rotation angle α of the condenser turret 12 that does not interfere with the opening 102a, the front lens part of the condenser lens group is configured to move up and down by an A dimension that does not interfere with the stage 102 and the stage receiver 101.
[0036]
The extremely low magnification condenser lens group 18 includes lenses 91, 92, 93, 94, and 95, and is fixed to the condenser turret 12 directly or via a very low magnification lens frame 96. Further, the front focal position of the ultra-low-magnification condenser lens group 18 is configured to coincide with the position of the field stop 107 of the high-magnification condenser lens group 17.
[0037]
(Function)
The operation of the first embodiment described above will be described. When the condenser turret 12 is turned and the high-magnification condenser lens group 16 or the low-magnification condenser lens group 17 is inserted in the illumination optical path, cam pins fixed to the lens frames 56 or 76 of the lens groups 16 and 17. 59 or 79 is moved along the cam groove 7a, and each lens group 16 or 17 is moved up to the normal illumination position. Together with the intermediate optical system provided in the base portion of the microscope main body 100, the sample 103 is obtained. Illuminate.
[0038]
In this case, the iris diaphragm 60 or 80 configured at the front focal position of the front lens portion of each lens group 16 or 17 moves together with each lens group 16 or 17 and functions as an aperture stop. That is, the U-shaped hole 62a or 82a provided in the diaphragm plate 62 or 82 fixed to the diaphragm adjusting ring 61 or 81 formed in each lens group 16 or 17 rotates the diaphragm operating ring 20. The aperture adjustment ring 61 or 81 can be rotated to adjust the aperture of the iris diaphragm 60 or 80 to adjust the contrast and brightness of the observation image.
[0039]
When the high-magnification condenser lens group 16 or the low-magnification condenser lens group 17 is inserted into the illumination optical path, click grooves 12a or 12b provided in the condenser turret 12 corresponding to the positions thereof, and Since the condenser turret 12 is clipped by the click device 19 fixed to the fixed frame 7, the position of each condenser lens group is not shifted by the operation of the aperture operation ring 20.
[0040]
Further, the cam groove 7 a provided in the fixed frame 7 has a rotation angle α of the condenser turret 12 in which the front lens portions of the high-magnification condenser lens group 16 and the low-magnification condenser lens group 17 do not interfere with the opening 102 a of the stage 102. In this range, the front lens portions of the condenser lens groups 16 and 17 are configured to move up and down by a dimension A that does not interfere with the stage 102 and the stage receiver 101. Therefore, even if the condenser turret 12 is rotated, the condenser lens group 16 and 17 do not interfere with the stage 102 and the stage receiver 101.
[0041]
That is, in the development view of the cam groove 7a in FIG. 4, when the high-magnification condenser lens group 16 is inserted into the illumination optical path, the cam pin 59 fixed to the lens frame 56 is positioned at D, and the low-magnification condenser lens group The cam pin 79 fixed to the 17 lens frame 76 is positioned at the position C. When the low-magnification condenser lens group 17 is inserted into the illumination optical path, the cam pin 79 is positioned at D and the cam pin 59 is positioned at E. When the extremely low magnification condenser lens group 18 is inserted into the illumination optical path, the cam pin 79 is located at the position F and the cam pin 59 is located at the position G. When the condenser lens group 16 or the low-magnification condenser lens group 17 is inserted into the illumination optical path, the condenser lens group is positioned at a normal position, When departing from Meiko path moves downward along only optical axis dimension A in FIG. 4, the condenser lens group 16 and 17 be rotated capacitor turret 12, there is no interference with the stage 102 and stage receiving 101.
[0042]
Since the condenser lens group 18 for extremely low magnification is fixed in the condenser turret 12, the stage 102 and the stage receiver 101 do not interfere with each other even if the condenser turret 12 is rotated.
[0043]
When the condenser lens group 18 for extremely low magnification is inserted into the illumination optical path, a condenser turret is formed by a click groove 12c provided in the condenser turret 12 corresponding to the position and a click device 19 fixed to the fixed frame 7. 12 is click-stopped.
[0044]
When the extremely low magnification condenser lens group 18 is inserted into the illumination optical path, the front focal position of the extremely low magnification condenser lens group 18 and the high magnification condenser lens group 16 or the low magnification condenser lens group 17 are provided. Since the position of the field stop 107 when it is inserted into the illumination optical path is configured to match, the field stop 107 functions as an aperture stop when the condenser lens group 18 for extremely low magnification is inserted into the illumination optical path. By adjusting the aperture stop, the contrast and brightness of the observation image can be adjusted by adjusting the aperture of the condenser lens group 18 for extremely low magnification.
[0045]
Further, the focusing handle 5 or 6 is operated to move the condenser turret 12 up and down to finely adjust the focal position of each condenser lens group, and the centering screws 10 and 11 are operated to move the condenser turret 12 horizontally. The optical axis position of each condenser lens group can be finely adjusted.
[0046]
Further, the high-magnification condenser lens group 16 and the low-magnification condenser lens group 17 are biased downward by the spring 63 and the spring 83, respectively, so that the cam pins 59 and 79 are accurately moved along the cam groove 7a. The
[0047]
(effect)
According to the first embodiment described above, the following effects can be obtained.
1) The condenser lens groups 16, 17, and 18 for each magnification are independently arranged in the condenser turret 12, and there is no restriction such as sharing of a lens unit or an optical path space as in the conventional technique. A lens configuration with optimal performance can be achieved.
[0048]
2) Since the aperture stop can be arranged in the condenser lens group in both the high and low magnification condenser lens groups, it is not necessary to add a stop to the microscope body 100, and the illumination aperture can be adjusted at each magnification. .
[0049]
3) Since the high-magnification condenser lens group 16 and the low-magnification condenser lens group 17 move up and down independently, it is not necessary to enlarge the opening 102a of the stage 102 for retracting the condenser lens group. The stage can be used, and illumination can be performed from a very low magnification to a high magnification by a simple operation of rotating the condenser turret 12.
[0050]
4) Since the single fixed cam 7 that moves the high-magnification condenser lens group 16 and the low-magnification condenser lens group 17 up and down in the optical axis direction can be shared by one, the mechanism is simple and can be manufactured at low cost.
[0051]
(Modification of the first embodiment)
a) A radial bearing may be attached to the tip of the cam pins 59 and 79 of the first embodiment so that the surface of the cam groove 7a rolls. By constituting in this way, rotation of capacitor turret 12 can be made smoother.
[0052]
b) In the first embodiment, the structure in which the condenser lens unit is attached to the stage receiver 101 has been described. However, the condenser lens unit may be attached to the microscope main body 100 independently of the stage receiver 101. Since this specific configuration is described in a published publication (Japanese Patent Laid-Open No. 7-174977) filed by the present applicant, a detailed description thereof is omitted here.
[0053]
<Second Embodiment>
(Constitution)
A second embodiment will be described with reference to FIGS. FIG. 5 is a longitudinal sectional view, FIG. 6 is a top view of a part of FIG. 5, and FIG. 7 is a development view of the cam of FIG. Here, the same parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted. The low-magnification condenser lens group 17 and the extremely low-magnification lens 18 are the same as those in FIG. 3, and will be described with reference to FIG.
[0054]
3 and 5 to 7, reference numeral 200 denotes a fan-shaped cam that is integrally fixed to the fixed frame 7 and formed slightly larger than twice the rotation angle α described later. The cam pin 59 fixed to the lens unit 76 (supporting the high-magnification condenser lens group 16) and the cam pin 79 fixed to the lens frame 76 (supporting the low-magnification condenser lens group 17) are in contact. The cam pins 59 and 79 are slid by the rotation of the condenser turret 12.
[0055]
Further, the cam 200 is configured to be in the normal illumination position when the high-magnification condenser lens group 16 and the low-magnification condenser lens group 17 are inserted into the illumination optical path.
[0056]
The inclination of the cam 200 is such that when the high-magnification condenser lens group 16 and the low-magnification condenser lens group 17 are inserted into and removed from the illumination optical path, the front lens portion of the condenser lens group is formed in the stage 102, respectively. Within the range of the rotation angle α of the condenser turret 12 that does not interfere with the part 102 a, each front lens part of the condenser lens group is configured to be movable up and down by a dimension A that does not interfere with the stage 102 and the stage receiver 101.
[0057]
(Function)
Next, the operation of the second embodiment configured as described above will be described. When the cam pin 59 fixed to the lens frame 56 of the high-magnification condenser lens group 16 and the cam pin 79 fixed to the lens frame 76 of the low-magnification condenser lens group 17 are in positions that do not contact the cam 200, Since the high-magnification condenser lens group 16 and the low-magnification condenser lens group 17 are always urged downward by the springs 63 and 83, the cam pins 59 and 79 are formed on the condenser turret 12 in parallel with the optical axis. The long holes 12x and 12y are held in contact with the lower end surfaces.
[0058]
Accordingly, even if the condenser turret 12 is rotated in this state, the condenser lens groups 16, 17, 18 do not interfere with the stage 102 and the stage receiver 101.
[0059]
In addition, when the condenser turret 12 is rotated and the high-magnification condenser lens group 16 and the low-magnification condenser lens group 17 are inserted into and removed from the illumination optical path, the condenser lens groups 16 and 17 are always held by springs 63 and 83, respectively. Since the cam pins 59 and 79 always move up and down in contact with the surface of the cam 200 because they are biased downward, the inclination of the cam 200 causes the condenser lens groups 16 and 17 to interfere with the stage 102 and the stage receiver 101. Since the condenserlet 12 is rotated, the condenser lens groups 16, 17, and 18 can be easily switched without interference.
[0060]
(effect)
As a result, according to the second embodiment, the cam 200 may be configured in a fan shape that is slightly larger than the necessary range for moving the condenser lens groups 16 and 17 up and down, that is, 2α. The cam 200 can be easily processed and can be manufactured at a lower cost. Other effects are the same as those of the first embodiment.
[0061]
(Modification of the second embodiment)
a) Similarly to the first embodiment, a radial bearing can be attached to the tip of the cam pins 59 and 79 of the second embodiment, and the inclined surface of the cam 200 can be configured to roll. By constituting in this way, rotation of capacitor turret 12 can be made smoother.
[0062]
b) In the second embodiment, the structure in which the condenser turret 12 is attached to the stage receiver 101 has been described. However, the condenser lens group may be attached to the microscope main body 100 independently of the stage receiver 101. Since this specific configuration is described in a published publication (Japanese Patent Laid-Open No. 7-174977) filed by the present applicant, a detailed description thereof is omitted here.
[0063]
【The invention's effect】
According to the present invention described above, it is possible to deal with a wide range of magnifications of the objective lens by a simple switching means, and in particular, it can cover the range of magnification of the objective lens less than 1 times. It is possible to provide an illumination optical system for a microscope that can be applied without using a microscope.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing a first embodiment of an illumination optical system for a microscope according to the present invention.
FIG. 2 is a top view of a part of FIG.
3 is a cross-sectional view taken along the line B-O-B ′ of FIG. 2 and viewed in the direction of the arrows.
4 is a development view of the cam groove of FIG. 1. FIG.
FIG. 5 is a longitudinal sectional view showing a second embodiment of the illumination optical system for a microscope according to the present invention.
FIG. 6 is a top view of a part of FIG.
7 is a development view of the cam groove in FIG. 5;
[Explanation of symbols]
1 ... Capacitor holder body
2 ... Moving holder
3 ... Pinion
4 ... Rack
5, 6 ... Focusing handle
7: Fixed frame having cam groove 7a
8 ... Plunger
9 ... Centering spring
10, 11 ... Centering screw
12 ... Condenser turret
13 ... axis
16 ... High-magnification condenser lens group
17 ... Low magnification condenser lens group
18 ... Very low magnification condenser lens group
20 ... Aperture control ring
56, 76 ... Lens frame
59, 79 ... cam pins
60, 80 ... iris diaphragm
61, 81 ... Aperture adjustment ring
63, 83 ... spring
101 ... Stage reception
102 ... Stage
200: Fan-shaped cam

Claims (3)

The microscope body is provided with a turret that is rotatable about an axis parallel to the optical axis, and a high-magnification condenser lens group, a low-magnification condenser lens group, and a very- low-magnification condenser lens group are respectively disposed in the turret, Each condenser lens group can be selectively inserted into the illumination optical path by rotating the turret, and the high-magnification condenser lens group and the low A microscope illumination optical system, wherein the magnification condenser lens group is configured to move independently in the optical axis direction as the turret rotates.   2. The illumination optical system for a microscope according to claim 1, wherein the mechanism for moving up and down in the direction of the optical axis comprises a single fixed cam. An aperture stop whose aperture can be adjusted is independently provided at the front focal position of the high-magnification condenser lens group and the low-magnification condenser lens group, and is configured to move in the optical axis direction integrally with each condenser lens group. 3. The illumination optical system for a microscope according to claim 1, wherein the illumination optical system is for a microscope.

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