JP4166328B2 - Microscope diaphragm mechanism - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a diaphragm mechanism of a microscope.
[0002]
[Prior art]
Regarding the microscope diaphragm mechanism, a technique (prior art 1) described in Japanese Patent Publication No. 63-15556 has been disclosed as a turret condenser for a microscope. This technique will be described with reference to FIGS. 12 is a front view of the transmission illumination optical path of the microscope, FIG. 13 is a top view of the transmission illumination optical path of the microscope, FIG. 14 is an enlarged sectional view of the condenser unit, FIG. 15 is a bottom view of the aperture ring, and FIG. FIG. 17 is a top view of the diaphragm ring receiver. 12 and 13, the microscope main body 61 is provided with a transmission illumination optical path 62, and a condenser unit 63 is provided on the transmission illumination optical path 62. A diaphragm mechanism 65 is disposed between the condenser lens groups 64 and 64 ′ in the condenser unit 63.
[0003]
In FIG. 14, the diaphragm mechanism 65 includes a diaphragm ring 73, a diaphragm ring receiver 75, and a plurality of diaphragm blades 74 interposed therebetween. The aperture ring receiver 75 is fixed to a unit main body 63A in the capacitor unit 63, and the aperture ring 73 is fitted to the aperture ring receiver 75 so as to be rotatable around the optical axis of the transmitted illumination optical path 62. A dowel 74 b is fixed to one end of the lower surface of the aperture blade 74, and the dowel 74 b is rotatably fitted in one of a plurality of dowel holes 75 b formed in the aperture ring receiver 75. The same applies to the other diaphragm blades 74. A dowel 74 c is also fixed to one end of the upper surface of the diaphragm blade 74, and the dowel 74 c is slidably engaged with a radial groove 73 b formed on the lower surface of the diaphragm ring 73. In addition to the diaphragm mechanism 65, a shutter mechanism is provided independently, and the aperture of the shutter plate 76 is inserted into and removed from the optical axis of the transmitted illumination optical path 62, so that the aperture diameter is increased. The shutter is opened and closed regardless.
[0004]
As shown in FIG. 15, the diaphragm ring 73 is provided with a diaphragm operating lever 71 and a radial groove 73b in which a dowel 74c of the diaphragm blade 74 is slidably engaged. The number of radial grooves 73b matches the number of diaphragm blades 74. As shown in FIG. 16, a dowel 74b is fixed to the lower surface side and a dowel 74c is fixed to the upper surface side of the plurality of aperture blades 74 incorporated in the aperture ring receiver 75. The dowel 74b on the lower surface side is rotatably fitted in a plurality of dowel holes 75b formed in the aperture ring holder 75 shown in FIG. The number of dowel holes 75b is the same as the number of radial grooves 73b.
[0005]
In the diaphragm mechanism configured as described above, when the operation lever 71 is operated to rotate the diaphragm ring 73 by a predetermined angle, the dowels 74c of the plurality of diaphragm blades 74 rotate at the same angle around the optical axis. Since the dowel 74b has the dowel hole 75b of the aperture ring receiver 75 as the center of rotation, the plurality of diaphragm blades 74 oscillate, and the aperture diameter formed by the plurality of diaphragm blades 74 changes.
[0006]
A recent microscope illumination device is required to have a large numerical aperture (NA) corresponding to an objective lens that requires high resolution. On the other hand, it is necessary to reduce the aperture diameter in order to increase the depth of focus and to improve the contrast. To achieve these, the aperture mechanism that adjusts the amount of illumination light supports from large to small apertures. What is possible is sought. In response to this requirement, a technique (conventional technique 2) described in Japanese Patent Laid-Open No. 3157609 is disclosed. This technique will be described with reference to FIGS. FIG. 18 is a longitudinal sectional view of the turret condenser for a microscope, and FIG. 19 is an exploded perspective view showing the detailed structure of the diaphragm operation panel and the second turret.
[0007]
In FIG. 18, the microscope turret condenser is divided into two stages of a first turret 91 and a second turret 92, and corresponds to various spectroscopic methods. A second turret 92 is provided at a lower stage of the first turret 91, and a diaphragm unit 93 using a diaphragm mechanism similar to that shown in the related art 1 is incorporated in the second turret 92. In addition, a diaphragm operation panel 94 for operating the diaphragm unit 93 is disposed between the first turret 91 and the second turret 92 and is held rotatably around the same rotation axis. As shown in FIG. 19, a ring gear 95 is rotatably attached to the lower part of the aperture unit 93 of the second turret 92. A drive gear 96 is rotatably disposed at a position where a part of the second turret 92 protrudes from the outer peripheral portion, and meshes with the ring gear 95. On the other hand, the aperture operation panel 94 is provided with an arcuate opening 97 having an opening range that does not interfere with an arbitrary aperture diameter.
[0008]
The diaphragm mechanism provided in the second turret 92 can be operated by operating the drive gear 96 or the diaphragm operation panel 94 with the diaphragm mechanism having the above-described configuration. Further, since the aperture operation panel 94 has an arc opening 97, operation can be performed without interfering with the aperture operation panel 94 even if the aperture diameter is arbitrary.
[0009]
[Problems to be solved by the invention]
As described above, recent microscope illumination apparatuses are required to have a large numerical aperture (NA) corresponding to an objective lens that requires high resolution. On the other hand, it is necessary to reduce the aperture diameter in order to increase the depth of focus and to improve the contrast. To achieve these, the aperture mechanism that adjusts the amount of illumination light supports from large to small apertures. What is possible is sought. However, considering the diaphragm mechanism in the above-mentioned prior art 2, if the rotation axis of the turret is provided outside the optical axis and adapted to a large aperture state in accordance with a large NA, the diameter of the turret is increased accordingly. There is a need to. In addition, in order to configure so as not to interfere with the aperture diameter by operating the drive gear or the aperture operation panel, the arc opening range of the transmission hole must be made very large, resulting in an increase in the size of the capacitor, As a result, the size of the mirror body is increased and the mirror body itself is significantly modified. In the case of the drive gear, there is also a complicated structure, and there are many problems such as inefficiency in space efficiency, cost increase due to complicated mechanism, decrease in accuracy, and difficulty in adjustment.
[0010]
Also, in recent industrial microscopes and the like, the stage used is becoming larger and heavier as the corresponding specimen such as an IC substrate becomes larger. In order to support this stage firmly so as not to affect the speculum, it is necessary to increase the rigidity by thickening the periphery of the optical axis. A wall is provided around the periphery. For this reason, the range of operation of the conventional capacitor is limited, and the operability is very poor. As shown in prior art 1, in FIG. 12, the diaphragm mechanism 65 is operated by the rotation of the diaphragm ring 73 (see FIG. 14) arranged concentrically around the optical axis, and the microscope main body 61 is recessed. The operation cannot be performed unless the finger is put into the aperture mechanism 65 at the position, and it is forced to operate with the belly of the finger in a state where it is difficult to apply force.
[0011]
Further, as shown in FIGS. 15 to 17, the necessary rotation range for rotating the diaphragm ring 73 to open and close the diaphragm blades 74 according to an arbitrary diaphragm aperture depends on the number of the diaphragm blades 74. However, it is generally as large as about 90 degrees (see FIG. 13) with respect to the aperture ring holder 75. In order to improve the operability, even if an attempt is made to lengthen the aperture control lever 71, it is impossible to space, or conversely, as the aperture control lever 71 becomes larger, the microscope main body becomes larger or the wall surrounding the capacitor There is a problem in that it is necessary to cut out a large amount.
[0012]
SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and an object of the invention according to claim 1, 2 or 3 is to easily open and close the aperture of a diaphragm even in a narrow space such as around a condenser of a microscope. The objective is to provide a microscope diaphragm mechanism that can be easily constructed.
[0013]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the invention according to claim 1, 2 or 3 is characterized in that a plurality of diaphragm blades forming a diaphragm aperture, a diaphragm ring pivotally attaching the diaphragm blades, and rotating to the diaphragm ring receiver A diaphragm ring that is freely fitted and has a diaphragm ring that engages with the diaphragm blade, and rotates the diaphragm ring to change the diaphragm aperture of the diaphragm blade. An operation lever having a fulcrum portion supported by the engagement lever and an engagement portion that engages with the diaphragm ring is provided, and the diaphragm ring is driven by a rotation operation around the fulcrum portion of the operation lever.
[0014]
In the microscope diaphragm mechanism according to the first, second, or third aspect of the invention, when the operation lever is rotated around the fulcrum portion, the diaphragm ring that engages with the engagement portion of the operation lever is rotated, and the diaphragm ring is further stopped. Since the diaphragm blades forming the aperture are rotated, the aperture diameter changes.
[0015]
In the microscope diaphragm mechanism according to the second or third aspect of the invention, in addition to the above-described operation, the diaphragm ring abuts on a restricting means for restricting the rotation of the diaphragm ring to determine the minimum diaphragm aperture.
[0016]
In the microscope diaphragm mechanism according to the third aspect of the invention, in addition to the above-described operation, the operation lever is moved at a position where the diaphragm blade has the minimum diaphragm aperture, and the minimum diaphragm aperture of the diaphragm blade is shielded by the operation lever.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
In the specific embodiment in the embodiment of the present invention, the stop mechanism of the condenser for a microscope is taken as an example. However, the present invention is not limited to this, and there is a space limitation on the optical path such as a light source stop and a field stop. The present invention can be applied to a diaphragm mechanism at a location. The aperture mechanism of the microscope according to the invention according to claim 1 corresponds to the first to third embodiments, and the aperture mechanism of the microscope according to claims 2 and 3 corresponds to the second to third embodiments. is doing. Hereinafter, specific embodiments will be described.
[0018]
(Embodiment 1)
1 to 6 show the first embodiment, FIG. 1 is a front view of a transmission illumination optical path of a microscope, FIG. 2 is a top view of the transmission illumination optical path of the microscope, FIG. 3 is a bottom view of an aperture mechanism, and FIGS. 6 is a diagram showing the relationship between the rotation position of the operating lever and the aperture diameter.
[0019]
1 and 2, a light source unit 11 constituting a transmission illumination optical path is disposed at the lower part of the microscope body 10, and a capacitor unit 12 is disposed at the upper part. A diaphragm mechanism is disposed below the capacitor unit 12 and is configured in the reverse direction to that shown in the prior art 1. A diaphragm ring receiver 18 is attached to the lower surface of the main body 12A of the capacitor unit 12 with a small screw 19, and a diaphragm ring 16 is rotatably fitted to the diaphragm ring receiver 18. A plurality of diaphragm blades 17 are interposed between the diaphragm ring receiver 18 and the diaphragm ring 16. A rotary shaft 14 is suspended from the lower surface of the aperture ring receiver 18 on the front side of the operating portion, and a fulcrum hole 13e as a fulcrum portion of the operating lever 13 is rotatably fitted to the rotating shaft 14. . Further, a pin 15 is suspended from the aperture ring 16, and a long groove 13 c (see FIG. 13) as an engaging portion formed at the tip of the operation lever 13 is engaged with the pin 15, and the operation lever 13 is rotated. By moving, the diaphragm ring 16 is rotated around the optical axis. As a result, the aperture diameter of the aperture blade 17 changes.
[0020]
Since the rotary shaft 14 which is the rotation center of the operation lever 13 is on the operator side with respect to the optical axis which is the rotation center of the aperture ring 16, the rotation radius is different at the position of the pin 15. The distance from each rotation center to the action point, that is, the rotation radius is proportionally added to the given rotation component, but in this embodiment, the rotation of the operation lever 13 is performed. The ratio of the radius to the turning radius of the aperture ring 16 is about 9: 4 (see FIG. 3). Accordingly, the rotation angle of the diaphragm ring 16 for moving the diaphragm blade 17 and the rotation angle of the operation lever 13 necessary for operating the rotation angle of the diaphragm ring 16 are different. In the present embodiment, as shown in FIG. 2, the rotation angle required by the diaphragm ring 16 is 90 °, whereas the operation range of the operation lever 13 is 40 ° as the rotation angle. The ratio of the 9: 4 turning radius is arbitrarily set according to the situation such as space.
[0021]
The diaphragm mechanism of the present embodiment will be described in detail with reference to FIG. In FIG. 3, an operation lever 13 that rotates about a rotation shaft 14 that is suspended from the lower surface of the aperture ring receiver 18 is formed of a handle 13a, an operation plate 13b, a long groove 13c, and a protrusion 13d. The handle 13a is bent in two steps and extended to a position where the operator can easily operate. The operation plate 13 b does not interfere with the aperture diameter formed by the inner shape of the diaphragm blade 17 and is configured to fit within the maximum movement range of the diaphragm blade 17 formed by the outer shape of the diaphragm blade 17. The moving range of the operation plate 13b can be stored only inside the aperture ring receiver 18. The long groove 13 c is formed to have a width dimension that can slide on the pin 15. The protrusion 13d is always in contact with the lower surface of the aperture ring 16 even when the operation plate 13b is moved to an arbitrary position in accordance with the aperture diameter, so that the rotation of the operation lever 13 is stabilized and the rotation is performed more than necessary. Even when power is applied, the influence of deformation such as distortion generated on the operation plate 13b is reduced.
[0022]
On the upper surface of the diaphragm ring 16, the same number of radial grooves 16 a as the plurality of diaphragm blades 17 are engraved. The aperture ring receiver 18 has a dowel hole 18a of the same number as the aperture blade 17 on the lower surface of the surface that accommodates the aperture blade 17. At least six diaphragm blades 17 are required, and in the present embodiment, ten diaphragm blades are configured. A downward dowel 20 is slidably engaged with the radial groove 16 a of the diaphragm ring 16 at one end of the diaphragm blade 17, and is freely rotatable at a dowel hole 18 a drilled in the diaphragm ring receiver 18 at the other end. An upward dowel 21 to be fitted to the is fixed. On the lower surface of the aperture ring receiver 18, stoppers 22A and 22B as restricting means are disposed at positions where the aperture diameter becomes maximum and minimum.
[0023]
The operation of the diaphragm mechanism having the above configuration will be described. When the operating lever 13 is rotated around the rotation shaft 14, a long groove 13 c formed at the tip of the operating lever 13 rotates a pin 15 suspended from the diaphragm ring 16 and is engraved in the diaphragm ring 16. The downward dowel 20 of the diaphragm blade 17 engaged with the radiation groove 16a is rotated. The aperture blade 17 rotates around the dowel hole 18a drilled in the aperture ring holder 18 in which the upward dowel 21 of the aperture blade 17 is fitted, so that the inner shape of the aperture blade 17 is formed. The aperture diameter changes. 4 to 6 show changes in the aperture diameter. In FIG. 4, the outer edge of the tip portion where the long groove 13 c of the operation lever 13 is formed contacts the stopper 22 </ b> A, and the aperture diameter is the maximum. In FIG. 5, the operation lever 13 is in an intermediate position, and the aperture diameter is also in the middle. In FIG. 6, the outer edge of the front end portion where the long groove 13c of the operation lever 13 is formed abuts against the stopper 22B, and the aperture diameter is minimum.
[0024]
According to this embodiment, even when the space around the condenser of the microscope is small, the aperture diameter can be easily opened and closed with a simple structure. In addition, since the operating lever is provided with a protrusion, the rotating operation of the operating lever is stabilized and the influence of deformation such as distortion generated on the operating lever is reduced even when excessive rotational force is applied. Can do. In addition, a stopper is provided on the aperture ring holder so that the operating lever comes in contact with the maximum and minimum aperture diameters, so that the diaphragm blades are not subjected to excessive load, affecting the failure and accuracy. There is no.
[0025]
(Embodiment 2)
7 to 8 show the second embodiment, FIG. 7 is a bottom view of the diaphragm mechanism showing the state of the minimum diaphragm aperture, and FIG. 8 is a diagram in which the minimum diaphragm aperture is shielded by the movement of the operation lever. The present embodiment is different from the first embodiment only in the operation lever and its related parts, and the other parts are the same, so only the different parts are shown, and the drawings and explanations of the same parts are omitted. 7 and 8, the same members as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.
[0026]
In FIG. 7, the throttle ring receiver 46 is attached to the lower surface of the main body 12 </ b> A (not shown) of the capacitor unit 12 (not shown) by the machine screw 19, as in the first embodiment. A diaphragm ring 43 is rotatably fitted to the diaphragm ring receiver 46, and a plurality of diaphragm blades (not shown) are interposed between the diaphragm ring receiver 46 and the diaphragm ring 43 as in the first embodiment. It is disguised. On the operator side of the lower surface of the aperture ring receiver 46, the rotary shaft 14 is suspended, and a fulcrum hole 41f as a fulcrum portion of the operation lever 41 is rotatably fitted. As with the first embodiment, the operation lever 41 is formed with a handle 41a, an operation plate 41b, and a protrusion 41c. Further, an action point portion 41d is formed at the distal end portion of the operation lever 41, and a torsion spring 42 is fixed to one end thereof. A long groove 41e as a substantially L-shaped engagement portion is formed in the action point portion 41d, and the pin 15 suspended from the aperture ring 43 is engaged and biased by the elastic force of the torsion spring 42. And fixed to one wall surface of the long groove 41e.
[0027]
A stopper 47A as a restricting means is suspended from the lower surface of the aperture ring receiver 46 at a position where the aperture diameter becomes maximum, and the outer edge of the operating point portion 41d of the operation lever 41 contacts. Further, a stopper 47B as a restricting means is suspended at a position where the aperture diameter is minimum, and a pin 45 suspended from the lower surface of the aperture ring 43 contacts. Other configurations are the same as those of the first embodiment.
[0028]
The operation of the diaphragm mechanism having the above configuration will be described. The operation of operating the aperture blade to reduce the aperture diameter from the maximum to the minimum is the same as in the first embodiment. When the operation lever 41 is further rotated from the position where the pin 45 on the aperture ring 43 abuts against the stopper 47B and the aperture diameter becomes minimum, the pin 15 is twisted and resists the elastic force of the spring 42, and the long groove 41e. As shown in FIG. 8, it stops at the end of the long groove 41 e and is locked because the acting direction of the elastic force of the torsion spring 42 changes in the radial direction of the rotating shaft 14. By this operation, the minimum aperture diameter is shielded by the portion of the operation lever 41 near the optical axis of the operation plate 41b. That is, it functions as a shutter that completely blocks illumination light. In addition, the elastic force of the torsion spring 42 at this time acts in a direction to lock the operation lever 41 at that position, so that the shutter is not inadvertently opened.
[0029]
According to the present embodiment, in addition to the effects of the first embodiment, the operation lever can be further rotated from the position of the minimum aperture diameter to shield the minimum aperture diameter, thereby fulfilling the function of a shutter for illumination light. .
[0030]
(Embodiment 3)
9 to 11 show the third embodiment, FIG. 9 is a bottom view of the diaphragm mechanism showing the state of the minimum diaphragm aperture, FIG. 10 is a diagram in which the minimum diaphragm aperture is shielded by the movement of the operation lever, and FIG. FIG. The present embodiment is different from the second embodiment only in the operation lever and its related parts, and the other parts are the same as those in the first and second embodiments. Description is omitted. 9, 10, and 11, the same members as those in the first embodiment and the second embodiment are denoted by the same reference numerals, and description thereof is omitted.
[0031]
In FIG. 9, on the operator side of the lower surface of the aperture ring receiver 46, the rotary shaft 14 is suspended and an operation lever 51 is rotatably fitted. As in the first embodiment, the operating lever 51 is formed with a handle 51a, a long groove 51c as an engaging portion, and a protruding portion 51d. Further, an operation plate 51b is formed at the central portion of the operation lever 51, and a shielding portion 51e for shielding the minimum aperture diameter is provided on the inside thereof. Furthermore, as shown in FIG. 11, a long hole 51f as a fulcrum portion is formed in a portion of the operation lever 51 into which the rotary shaft 14 is fitted. A click spring 52 is fixed in the vicinity of the elongated hole 51f of the operating lever 51. When the operating lever 51 is in the state shown in FIG. 9, the tip 52a of the click spring 52 and one end 51g of the elongated hole 51f are connected. The operating lever 51 rotates while being held by the rotating shaft 14. Other configurations are the same as those in the first and second embodiments.
[0032]
The operation of the diaphragm mechanism having the above configuration will be described. The operation of operating the aperture blade to reduce the aperture diameter from the maximum to the minimum is the same as in the first embodiment. When the pin 45 on the aperture ring 43 abuts against the stopper 47B and the operation lever 51 is pushed out in the direction of the arrow 53 (radial direction of the rotating shaft 14) as shown in FIG. The operation lever 51 moves in that direction and is in the state shown in FIG. That is, the minimum aperture diameter is shielded by the shielding portion 51e of the operation lever 51, and functions as a shutter that completely blocks illumination light. At this time, as shown in FIG. 11, the rotating shaft 14 is held by the valley portion of the click 52 b of the click spring 52, and the position is held by the frictional force. Therefore, the shutter is not inadvertently opened.
[0033]
According to the present embodiment, in addition to the same effects as in the first embodiment, the operation lever is further pushed out from the position of the minimum aperture diameter in the radial direction of the rotation shaft to shield the minimum aperture diameter, and the shutter of the illumination light Can fulfill the function. Compared to the second embodiment, this is effective when the space around the capacitor is further narrow and the rotation angle of the operation lever cannot be expanded.
[0034]
The technical idea of the following configuration is derived from the specific embodiment described above.
(Appendix)
(1) The distance between the fulcrum portion of the operation lever and the engagement portion is longer than the distance between the rotation center of the aperture ring and the engagement portion of the operation lever. Microscope diaphragm mechanism.
[0035]
In addition to the effect of the first aspect, since the turning radius from the fulcrum portion of the operating lever to the engaging portion is larger than the turning radius from the turning center of the aperture ring to the engaging portion, the turning angle of the operating lever is small. By this operation, the aperture ring can be driven at a large rotation angle.
[0036]
(2) The aperture mechanism of the microscope according to claim 1, wherein the shape of the operation lever around the fulcrum portion is partially expanded within a range not interfering with the aperture diameter of the aperture blade.
[0037]
In addition to the effect of the first aspect, even if the rotation operation of the operation lever is stabilized and an excessive rotational force is applied, it is possible to reduce the influence of the distortion generated on the operation lever.
[0038]
(3) The stop mechanism of the microscope according to claim 1, wherein a stopper for restricting the rotation of the operation lever is provided on the stop ring holder at a position where the stop blade has a minimum stop aperture.
[0039]
In addition to the effect of the first aspect, the diaphragm blade is not subjected to an excessive load, and does not affect the failure or accuracy.
[0040]
(4) By rotating the operation lever around the fulcrum part or moving straight with respect to the fulcrum part at a position where the diaphragm blades have the minimum diaphragm aperture, 3. The microscope stop mechanism according to claim 2, wherein the operation lever is configured to shield the operation lever.
[0041]
In addition to the effect of the second aspect, the operating lever can be further rotated or moved straight from the position of the minimum aperture diameter to shield the minimum aperture diameter, thereby fulfilling the function of a shutter for illumination light.
[0042]
(5) The movement of the operation lever for shielding the minimum diaphragm aperture of the diaphragm blade with the operation lever is performed against the elastic force of the spring member. The microscopic diaphragm mechanism described.
[0043]
In addition to the effect of Claim 3 or Supplementary Note (4), the operation lever is locked at that position by the action of the elastic force, and the shutter is not inadvertently opened.
[0044]
(6) The restricting means is a pin provided on each of an aperture ring and an aperture ring holder so that the aperture blades come into contact with each other at a position where the aperture blade has a minimum aperture diameter. Microscope diaphragm mechanism.
[0045]
In addition to the effect of claim 2, when the operating lever moves so as to shield the minimum aperture from the position where the aperture blade has the minimum aperture, the pins come into contact with each other and do not apply more load than necessary. There is no impact on failure or accuracy.
[0046]
【The invention's effect】
According to the first, second, or third aspect of the invention, the opening / closing operation of the aperture can be easily performed with a simple structure even in a narrow space such as around the condenser of the microscope.
[0047]
According to the invention according to claim 2 or 3, in addition to the above effect, the diaphragm blade is not subjected to an unnecessarily heavy load and does not affect the failure or accuracy.
[0048]
According to the invention of claim 3, in addition to the above effect, the operation lever can be further moved from the position of the minimum aperture diameter to shield the minimum aperture diameter, thereby fulfilling the function of a shutter for illumination light.
[Brief description of the drawings]
FIG. 1 is a front view of a transmission illumination optical path of a microscope according to a first embodiment.
FIG. 2 is a top view of a transmission illumination optical path of the microscope according to the first embodiment.
FIG. 3 is a bottom view of the aperture mechanism according to the first embodiment.
FIG. 4 is a diagram illustrating a relationship between a rotation position of an operation lever and a diaphragm aperture according to the first embodiment.
FIG. 5 is a diagram showing a relationship between the rotation position of the operation lever and the aperture diameter of the first embodiment.
6 is a diagram showing a relationship between a rotation position of the operation lever and the aperture diameter of the first embodiment. FIG.
FIG. 7 is a bottom view of a diaphragm mechanism showing a state of a minimum diaphragm aperture according to the second embodiment.
FIG. 8 is a diagram in which the minimum aperture is shielded by the movement of the operation lever according to the second embodiment.
FIG. 9 is a bottom view of the diaphragm mechanism showing a state of a minimum diaphragm aperture according to the third embodiment.
FIG. 10 is a diagram in which the minimum aperture is shielded by the movement of the operation lever according to the third embodiment.
FIG. 11 is an enlarged view of a part A in FIG. 10 of the third embodiment.
12 is a front view of a transmission illumination optical path of a microscope according to the related art 1. FIG.
FIG. 13 is a top view of a transmission illumination optical path of a microscope according to the related art 1;
14 is an enlarged cross-sectional view of a capacitor unit of Prior Art 1. FIG.
FIG. 15 is a bottom view of a diaphragm ring of prior art 1;
FIG. 16 is a top view of a diaphragm ring receiver and diaphragm blades of prior art 1;
FIG. 17 is a top view of the diaphragm ring receiver of the prior art 1;
18 is a longitudinal sectional view of a turret condenser for a microscope according to prior art 2. FIG.
FIG. 19 is an exploded perspective view of a principal part showing a detailed structure of a diaphragm operation panel and a second turret according to prior art 2;
[Explanation of symbols]
13 Operation lever
13c long groove
13e fulcrum hole
16 Aperture ring
17 Aperture blade
18 Diaphragm holder

Claims (3)

A plurality of aperture blades that form an aperture diameter, an aperture ring holder that pivotally mounts the aperture blades, and an aperture ring that is rotatably fitted to the aperture ring ring and engages with the aperture blade, In the aperture mechanism of the microscope that changes the aperture diameter of the aperture blade by rotating the ring,
An operation lever having a fulcrum part rotatably supported by the diaphragm ring receiver and an engagement part engaging with the diaphragm ring is provided, and the diaphragm is operated by a rotation operation around the fulcrum part of the operation lever. A microscope diaphragm mechanism characterized in that the ring is driven. 2. The stop mechanism for a microscope according to claim 1, wherein a restricting means for restricting the rotation of the stop ring is provided at a position where the stop blade has a minimum stop aperture. 3. The configuration according to claim 2, wherein the minimum diaphragm aperture of the diaphragm blade is shielded by the operation lever by further moving the operation lever at a position where the diaphragm blade has a minimum aperture diameter. Microscope diaphragm mechanism.

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