JP4613337B2 - microscope - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a microscope.
[0002]
[Prior art]
FIG. 9 is a side view showing an example of a conventional microscope. In FIG. 9, a lens barrel 2 is fixedly or detachably provided above the microscope body 1, and an eyepiece 3 is fixedly or detachably provided above it. Below the lens barrel 2, a plurality of objective lenses 5 are detachably provided via a turret member 4 rotatably attached to the microscope body 1.
[0003]
Below the objective lens 5, a table 8 is provided so as to be movable up and down via a vertical movement mechanism 7 fixed to the main body base 6. The vertical movement mechanism unit 7 moves the mounting table 8 up and down by manually rotating a focusing coarse movement handle 17 and a focusing fine movement handle 18 which are rotatably provided in the microscope body 1. A condenser lens receiver 10 is provided in the vertical movement mechanism 7 so as to be movable up and down immediately below the mounting table 8. The condenser lens 9 is provided with a locking screw 11 in the condenser receiver 10. It is fixed with.
[0004]
The condenser lens 9 is provided with an opening / closing knob 12 for adjusting an aperture stop (not shown) so as to be rotatable along the periphery of the condenser lens 9. The opening / closing knob 12 is manually rotated to open the opening of the condenser lens 9. The iris can be adjusted.
[0005]
The main body base portion 6 of the microscope body 1 is also provided with an illuminating device 14 that illuminates the condenser lens. A field stop (not shown) built in the illuminating device 14 is manually rotated by a field stop opening / closing ring 15. By doing so, the field stop can be adjusted.
[0006]
In conventional microscopes of this type, the relatively expensive, mainly in research microscopes, the aperture stop scale of the condenser lens, the field stop scale, and the fine adjustment scale of the focusing fine movement handle are standard on the microscope by printing and nameplates. It is common. This is because expensive microscopes have room for manufacturing costs due to their price, and even expensive microscopes are likely to be used for multiple purposes and may be used by an unspecified number of people. It is also possible. On the other hand, a relatively inexpensive training microscope used mainly by students and students is not equipped with the scales as described above, or even if equipped, each functional component is integrated with the scale with a plastic mold or the like. It was common to produce by die casting, and the scale and background were the same color and difficult to read. In addition to the fact that there is no margin in terms of manufacturing cost, it is conceivable that the microscope, which is relatively inexpensive in terms of usage, has limited purposes such as practical training, and the scale is used less frequently.
[0007]
Each scale used in the microscope will be described below.
[0008]
It is known that when the aperture stop of the condenser lens is adjusted to about 70 to 80% of the numerical aperture of the objective lens to be used, an image with good contrast can be obtained without reducing the resolution of the objective lens so much. Therefore, in many cases, the numerical aperture of the condenser lens aperture diaphragm is not the numerical value of the aperture of the condenser lens but the numerical aperture is displayed so that the numerical aperture is 70 to 80% of the numerical aperture of the objective lens. This type of usage is effective when only the same type of objective lens is attached, such as only achromat or only apochromat, and it is easier to use if a scale displaying the magnification of the objective lens is prepared at a pre-calculated position. Become. This scale is useful for teaching elementary and junior high school students how to use the microscope.
[0009]
However, in the case of different types of objective lenses such as achromat and apochromat, the numerical aperture is different even if the magnification is the same, so if there is a possibility that different types of objective lenses can be mounted on the same microscope, the magnification is displayed. The scale cannot be used. Also, as you get used to using the microscope, remove the eyepiece from the lens barrel and look inside the lens barrel to observe the pupil of the objective lens and the aperture stop of the condenser lens with the naked eye. It is possible to adjust the aperture stop of the condenser lens while viewing the image of the stop. In such a case, the scale of the aperture stop of the condenser lens is not necessary. On the other hand, in some training microscopes or the like, the eyepiece is fixed to the lens barrel so that the eyepiece is not broken or lost. With such a microscope, it is not possible to easily look into the pupil of the objective lens.
[0010]
The field stop serves to prevent fading of specimens from fading due to stray light from areas that are not observed by illuminating only the parts necessary for observation and entering the microscope to prevent contrast fading. When observed, the field stop image can be seen together with the sample image. For this reason, the field stop can be adjusted while observing the microscope, so the scale is not so necessary. Thus, when the microscope is observed through an eyepiece or a finder of a photographic apparatus, the scale of the field stop is not very effective. However, when a CCD camera (charge-coupled device camera) or DSC camera (digital still camera) without a finder for a microscope is attached to the microscope, it is appropriate to have a scale for the field stop that displays the shooting range. An image with good contrast can be obtained.
The fine movement scale of the focusing fine movement handle is used to measure the size of the specimen in the depth direction. A high-magnification objective lens, for example, a x40 objective lens has a depth of focus of about 1 μm even when viewed through a x10 eyepiece, so that it focuses on two different locations in the thickness direction and reads the scale at that time, If the difference is taken, the size in the thickness direction can be known, but many microscope users are mainly interested in observation and are not often used for such measurement. However, the fine adjustment handle for focusing can also be used for measurement if it exists, and may be necessary depending on the purpose of use.
[0011]
[Problems to be solved by the invention]
The standard equipment with a scale that is easy to see in the conventional technology described above increases the manufacturing cost, and the cost is high even for a user who does not need the scale.
[0012]
When using different types of objective lenses, the aperture scale of the condenser cannot display the magnification but displays the numerical aperture. When adjusting the aperture with the scale, it is necessary to calculate the aperture size. It is inconvenient.
[0013]
The field stop scale is effective when a CCD camera without a viewfinder for a microscope or a DSC camera is attached for shooting, but if the image sensor size is different, a scale for each size is required and a magnification display is provided as standard. This makes it difficult to record the scale and the objective magnification according to the image pickup device as the aperture display, and adjusts the aperture while corresponding to the recording.
[0014]
The present invention has been made in view of the above situation, and an object thereof is to provide a microscope that can supply necessary scales only to necessary users.
[0015]
[Means for Solving the Problems]
According to the first aspect of the present invention, there is provided an aperture stop (aperture stop of the condenser lens 9) and a condenser lens provided with the aperture stop, and a flat first positioning guide portion (9a) provided on the outer peripheral portion. 9) and a scale display portion (13b), is detachably attached to the condenser lens, and is formed into a flat second positioning guide portion (13a) that fits into the first positioning guide portion. ) Is provided with an aperture stop scale ring (13) formed on the outer periphery .
[0016]
In the present invention, the first positioning guide member formed in the flat shape is formed to face in the diametrical direction .
[0017]
In the present invention, it is possible to reduce the cost by using as a standard a microscope that is not equipped with the scale members (13, 16, 19).
[0018]
Further, in the present invention, the first positioning guide portion is formed at a left and right position when the condenser lens is mounted on the microscope as viewed from the eyepiece side of the microscope .
In the present invention, the aperture stop scale ring is sandwiched between the condenser lens and the condenser lens mounting portion (10) of the microscope.
In the present invention, the scale display part is formed on the outer peripheral part of the aperture stop scale ring different from the second positioning guide part.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to FIGS. In the embodiment shown in FIGS. 1 to 8, the same parts as those of the conventional microscope described with reference to FIG. .
[0020]
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0021]
FIG. 1 is a side view of a microscope according to an embodiment of the present invention, and FIG. 2 is an enlarged partial cross-sectional view of a condenser lens mounting portion of FIG. 3 is a view of the condenser lens 9 shown in FIG. 2 as viewed from the direction of arrow A, and FIG. 4 is a drawing showing the aperture stop scale ring 13. FIG. 5 is a partially enlarged view of the illumination device 14 of FIG. 1, and FIG. 6 is a drawing showing the field stop scale ring 16. FIG. 7 is a partially enlarged view of the focusing handle of FIG. 1 including the coarse movement handle 17 and the fine movement handle 18, and a front view is also shown. FIG. 8 shows the fine movement scale ring 19.
[0022]
In the present embodiment, the outer peripheral portion and the lower end surface of the condenser lens 9 serve as attachment portions for the aperture stop ring 13, and the aperture stop scale ring 13 is fitted together with the condenser lens 9 in the condenser lens receiver 10 to be locked. It is fixed by screws 11. The condenser lens 9 is provided with flat positioning guide portions 9a and 9a opposed to each other in the diameter direction (see FIG. 3), and the aperture guide scale ring 13 has a positioning guide portion 13a corresponding to the guide portions 9a and 9a. 13a (see FIG. 4), and the aperture stop scale ring 13 is fitted into the condenser lens 9 to restrain each other from rotating relative to each other.
[0023]
The condenser lens 9 is provided with an aperture stop knob 12 for adjusting an aperture stop (not shown) so as to be rotatable around the optical axis. The condenser lens 9 is formed on the aperture stop scale ring 13 by an index 12 a of the aperture stop knob 12. The magnification display scale position can be read.
[0024]
In this embodiment, the aperture stop scale ring 13 is configured to be fitted to the condenser lens 9 and locked with the locking screw 11. Therefore, it is not necessary to provide the aperture stop scale ring 13 as a standard specification of the microscope, and a microscope user may attach and use the aperture stop scale ring supplied as a special specification if necessary.
[0025]
In addition, the aperture stop scale ring 13 can be prepared with different magnifications corresponding to the objective lenses having different numerical apertures of the achromatic system or the apochromatic system, and can be used by replacing them according to the objective lens to be used.
[0026]
On the other hand, in the illumination device 14, a field stop scale ring 16 can be detachably fitted into a field stop opening / closing ring 15 for adjusting a field stop (not shown). In the present embodiment, the field stop opening / closing ring 15 (see FIG. 5) is provided with two positioning holes 15a and 15b opposed to each other in the diameter direction, while the field stop scale ring 16 (see FIG. 6) has these positioning holes. Positioning pins 16a and 16b that are locked to the holes 15a and 15b are provided. When the necessary field stop scale ring 16 is attached to the field stop opening / closing ring 15, the positioning holes 15a and 15b and the positioning pins 16a and 16b Are engaged, and the field stop scale ring 16 is constrained by the field stop opening / closing ring 15 so as not to rotate relative to each other.
[0027]
Thus, as a standard specification of the microscope, a field stop scale ring as a special specification can be purchased as necessary, and can be attached or exchanged as necessary even if it does not have a field stop scale ring. It should be noted that the scale of the field stop scale ring attached by the indicator 14a of the illumination device may be read.
[0028]
Further, in the present embodiment, as shown in FIGS. 7 and 8, two positioning grooves 18a and 18b are formed on the outer peripheral portion of the fine movement handle 18 so as to face each other in the diametrical direction. The fine movement scale ring 19 is formed with two positioning projections 19a and 19b correspondingly. When the fine movement scale ring 19 is fitted to the fine movement handle 18, the positioning grooves 18a and 18b and the positioning protrusions 19a and 19b are engaged with each other. Therefore, the fine movement scale ring 19 is restrained by the fine movement handle 18 from rotating relative to each other.
[0029]
In this way, as a standard specification of the microscope, a fine movement scale ring as a special specification may be attached and used as necessary even if it does not have a fine movement scale ring. It should be noted that the scale of the fine movement scale ring mounted by the coarse movement handle index 17a may be read.
[0030]
Next, the operation of the embodiment will be described.
[0031]
The user only needs to prepare and insert a scale as necessary. The aperture stop scale ring 13 is aligned with the positioning guide portions 9a and 9a of the condenser lens, and the field stop scale ring 16 is positioned with the positioning holes 15a and 15b and the positioning pins. The fine movement scale ring 19 is constrained in position by fitting the positioning protrusions 19a and 19b and the positioning grooves 18a and 18b, respectively.
[0032]
The aperture stop scale ring 13 can be used for each purpose by preparing a magnification display ring for each series of different numerical apertures of the achromatic system or the apochromatic system.
[0033]
The magnification display scale 16c of the field stop scale ring usually indicates a position where the field stop image is narrowed to a size that circumscribes the field ring (not shown) of an eyepiece used for observation. In addition, a field stop scale ring indicating the size of the field stop image circumscribing the image sensor of the CCD camera or DSC camera can be prepared.
[0034]
The fine movement scale ring 19 uses a transparent acrylic resin or polycarbonate resin, and if the fine movement scale 19c is displayed on the fine movement scale ring 19 by printing a reverse letter or the like, the level difference from the coarse movement handle index 17a is small and easy to read.
[0035]
【The invention's effect】
In a microscope having at least one of an aperture stop, a field stop, and a focusing fine adjustment handle of a condenser lens according to the present invention as an adjustable member, a scale member having a scale corresponding to at least one of the adjustable members is removed. According to the microscope provided with a mounting portion for freely mounting, a standard microscope with a reduced manufacturing cost for a user who does not need a scale by changing the state without each scale member to a standard microscope. For a user who needs a scale, a microscope equipped with the necessary scale can be provided.
[0036]
In addition, the aperture stop scale ring of the condenser lens can respond to changes in the objective lens to be used by preparing multiple magnification display scales according to the type of objective lens. In addition to the magnification display scale that circumscribes the camera, it is possible to perform shooting with good contrast by using a magnification display scale of an objective lens that matches the imaging element of the camera used for shooting.
[0037]
Further, when each detachable scale member is attached at a predetermined position, the position is determined and restricted, and each scale can be read easily and accurately by changing the background, color, brightness, and the like.
[Brief description of the drawings]
FIG. 1 is a side view of a microscope according to an embodiment of the present invention.
FIG. 2 is an enlarged partial cross-sectional view of a capacitor mounting portion of FIG.
FIG. 3 is a view taken along the arrow A of FIG.
FIG. 4 is a diagram showing an aperture stop scale ring.
FIG. 5 is an enlarged view of the illumination device portion of FIG. 1;
FIG. 6 is a diagram showing a field stop scale ring.
FIG. 7 is an enlarged view of the focusing handle portion of FIG. 1 and also a front view.
FIG. 8 is a diagram showing a fine movement scale ring.
FIG. 9 is a side view of a conventional microscope.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... The microscope main body 2 ... The lens barrel 3 ... The eyepiece 4 ... The turret member 5 ... ... Objective lens 6 ... Base body 7 ... Vertical movement mechanism 8 ... Loading table 9 ... · Condenser lens 9a ················································································ ... Indicator 13 ... Aperture aperture scale ring 13a ... Positioning guide 13b ... Magnification display scale 14 ... Illumination device 14a ... ... Indicator 15 ... Field stop opening / closing rings 15a, 15b ... Positioning holes 16 ... Field stop scale rings 16a, 16b ... Position Female pin 16c... Magnification display scale 17... Coarse adjustment handle 17a for focusing... Indicator 18... Fine adjustment handles 18a and 18b for focusing. · Positioning groove 19 ········ Fine adjustment scale ring 19a, 19b ... Positioning projection 19c ······ Fine adjustment scale

Claims (5)

An aperture stop ,
A condenser lens in which the aperture stop is provided and a first positioning guide portion formed flat is provided on an outer peripheral portion;
An aperture stop having a scale display portion, detachably attached to the condenser lens, and a flat second positioning guide portion fitted on the first positioning guide portion. A microscope having a scale ring . The microscope according to claim 1, wherein the first positioning guide member formed in a flat shape is formed so as to face the diameter direction . The said 1st positioning guide part is formed in the left-right position seeing from the eyepiece lens side of the said microscope, when the said condenser lens is mounted | worn with the said microscope. Microscope.   The microscope according to claim 1, wherein the aperture stop scale ring is sandwiched between the condenser lens and the condenser lens mounting portion of the microscope.   The microscope according to any one of claims 1 to 4, wherein the scale display unit is formed on an outer peripheral part of the aperture stop scale ring different from the second positioning guide unit.

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