JP2001337278A - microscope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a microscope which allows mounting of scales only when needed relating to an iris diaphragm, field stop and fine focus adjustment handle. SOLUTION: The microscope having at least one of the iris diaphragm, field stop and fine focus adjustment handle as an adjustable member is provided with a mounting part for freely removably mounting a scale member having the scale corresponding to at least one of the adjustable members.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a microscope.

[0002]

2. Description of the Related Art FIG. 9 is a side view showing an example of a conventional microscope. In FIG. 9, a lens barrel 2 is provided above a microscope main body 1.
Is fixedly or detachably provided, and an eyepiece 3 is fixedly or detachably provided above it. Lens barrel 2
Below, a plurality of objective lenses 5 are detachably provided via a turret member 4 rotatably attached to the microscope main body 1.

[0003] Below the objective lens 5, a main body base 6 is provided.
A mounting table 8 is provided so as to be able to move up and down via a vertically moving mechanism 7 fixedly mounted on the base. The vertical movement mechanism unit 7 moves the stage 8 up and down by manually rotating a focusing coarse movement handle 17 and a focusing fine movement handle 18 provided rotatably on the microscope main body 1. Immediately below the stage 8,
A condenser lens receiver 10 is provided in the vertical movement mechanism 7 so as to be vertically movable in the vertical movement mechanism 7, and a condenser lens 9 is fixed to the condenser receiver 10 with a locking screw 11.

An opening / closing knob 12 for adjusting an aperture stop (not shown) is provided on the condenser lens 9.
The opening / closing knob 12 can be manually rotated to adjust the aperture stop of the condenser lens 9.

The main body base 6 of the microscope main body 1 also has
An illumination device 14 for illuminating the condenser lens is provided, and a field stop (not shown) built in the illumination device 14
By manually rotating the field stop opening / closing ring 15, the field stop can be adjusted.

[0006] In conventional microscopes of this kind, relatively expensive, mainly in research microscopes, the aperture stop graduation of the condenser lens, the field stop graduation, and the fine movement graduation of the focusing fine movement handle are standard equipment on the microscope by printing or nameplate. It is common that it is. This is because expensive microscopes can afford manufacturing costs due to their price, and more expensive microscopes are more likely to be used for multiple purposes.
Another reason is that it is conceivable that an unspecified number of people use it. On the other hand, relatively inexpensive training microscopes mainly used by students or students are not equipped with the above-mentioned scales, or even if equipped, each functional part is integrated with the scale by a plastic mold or the like. It was generally made by die-casting and the scale and background were the same color and hard to read. This is because there is no margin in terms of manufacturing cost, and a microscope that is relatively inexpensive in terms of use has limited purposes such as for training, and the scale is not frequently used.

The above-mentioned scales used in the microscope will be described below.

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, a high-contrast image can be obtained without significantly reducing the resolution of the objective lens. Therefore, the numerical aperture of the condenser lens is not displayed on the scale of the condenser lens aperture stop, but the numerical aperture of the condenser lens.
There are many ways to calculate and match to 80%. This kind of usage is effective when only the same type of objective lens is attached, such as only achromat or apochromat, and it is easier to use by preparing a scale that indicates the magnification of the objective lens at a position calculated in advance. Become. When teaching elementary and junior high school students how to use a microscope, such a scale of magnification display is convenient.

However, in the case of different types of objective lenses such as achromat and apochromat, for example, there is a possibility that different types of objective lenses may be attached to the same microscope because the numerical aperture is different even if the magnification is the same. Means that the scale cannot be used by the magnification display. Also, as you become accustomed to using the microscope, pull out 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 also possible to adjust the aperture stop of the condenser lens while looking at the image of the stop so that it becomes about 80%. In such a case, the scale of the aperture stop of the condenser lens becomes unnecessary. On the other hand, in a training microscope or the like, an eyepiece is fixed to a lens barrel so as to prevent the eyepiece from being dropped and broken or lost. With such a microscope, it is not possible to easily look into the pupil of the objective lens.

The field stop serves to prevent the stray light from not being observed from entering the microscope to deteriorate the contrast by illuminating only the part necessary for observation and to prevent the specimen from discoloring. When a microscope is observed through a lens, a field stop image can be viewed together with the sample image.
Therefore, since the field stop can be adjusted while observing the microscope, the scale is not so necessary. As described above, the scale of the field stop is not very effective when the microscope is observed through the eyepiece or the finder of the photographing device. However, if a CCD camera (charge-coupled device camera) or DSC camera (digital still camera) without a finder for the microscope is attached to the microscope for shooting, if there is a scale on the field stop that displays the shooting range, Aperture, and an image with good contrast can be obtained. The fine scale of the fine focus handle is used to measure the size of the specimen in the depth direction. For a high-magnification objective lens, for example, a × 40 objective lens, even when observed through a × 10 eyepiece, since the focal depth is about 1 μm, focus is set on two different points in the thickness direction, and the scale at that time is read. If you take the difference, you can know the size in the thickness direction, but many microscope users are mainly observing,
At present, it is rarely used for such measurement. However, the focusing fine movement handle can also be used for measurement if present, and is necessary depending on the purpose of use.

[0011]

SUMMARY OF THE INVENTION In the above-mentioned prior art, the standard equipment with easy-to-read scales increases the manufacturing cost,
The cost is also high for a user who does not need the scale.

When using a different type of objective lens, the aperture stop scale of the condenser cannot be displayed as a magnification, but becomes a numerical aperture display. When adjusting the stop with the scale, it is necessary to calculate the size of the stop. Inconvenient in junior high school education.

The field stop scale is effective when a CCD camera or a DSC camera without a finder for a microscope is mounted for photographing. However, when the size of the image sensor is different, a scale for each size is required, and the magnification is displayed. Is difficult to equip as standard, and it is troublesome to record the scale and the objective magnification according to the image sensor as the aperture display, and adjust the aperture while corresponding to the recording.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a microscope capable of supplying a necessary scale only to a necessary user.

[0015]

According to the first aspect of the present invention, there is provided a microscope having at least one of an aperture stop (aperture stop of a condenser lens 9), a field stop, and a focusing fine movement handle (18) as an adjustable member. Mounting portions (9a, 9a; 15a, 15b; 18a, 18b) for removably mounting scale members (13, 16, 19) having scales corresponding to at least one of the adjustable members. I suggest something.

In the present invention, the mounting portions (9a, 9a) corresponding to the scale members (13) of the aperture stop of the condenser lens (9) can be provided on the condenser lens (9).

In the present invention, each of the scale members (13,
16, 19) can reduce costs by standardizing a microscope that is not equipped with the microscope.

Further, in the present invention, each of the scale members (1)
3, 16, 19) scales are printed, engraved, engraved with nameplates and multicolored molds, and the scale members (13, 16, 19) are changed in background, color and brightness for easy viewing. can do.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below in detail with reference to FIGS.
In the embodiments shown in FIGS. 1 to 8, the same parts as those of the prior art microscope described with reference to FIG. 9 are indicated only by reference numerals in the drawings, and description thereof will be omitted. Hereinafter, parts different from the prior art will be mainly described. .

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

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. FIG. 3 shows the condenser lens 9 of FIG.
4 is a drawing showing the aperture stop scale ring 13. FIG. FIG. 5 is a partially enlarged view of the illumination device 14 of FIG. 1, and FIG. 6 is a view showing a field stop scale ring 16. FIG. 7 shows a coarse movement handle 17 and a fine movement handle 18 shown in FIG.
Is a partially enlarged view of the focusing handle, and a front view is also shown. FIG. 8 is a drawing showing the fine movement scale ring 19.

In the present embodiment, the condenser lens 9
The outer peripheral portion and the lower end surface of the lens are a mounting portion for an aperture stop ring 13. The aperture stop scale ring 13 is fitted into the condenser lens receiver 10 together with the condenser lens 9, and is fixed by a locking screw 11. The condenser lens 9 has a flat positioning guide portion 9a opposed to the diameter direction.
9a is provided (see FIG. 3), and a positioning guide 1 is provided on the aperture stop scale ring 13 corresponding to the guides 9a, 9a.
3a and 13a are formed (see FIG. 4), and when the aperture stop scale ring 13 is fitted into the condenser lens 9, they are restrained from rotating relative to each other.

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 magnification display scale position formed on the aperture stop scale ring 13 can be read by 2a.

In this embodiment, the aperture stop scale ring 1
Reference numeral 3 denotes a configuration in which the fitting 3 is merely engaged with the condenser lens 9 and locked by 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 the microscope user may mount and use the aperture stop scale ring supplied as a special specification as needed.

The aperture stop scale ring 13 should be prepared with a different magnification display corresponding to an achromatic or apochromatic objective lens having a different numerical aperture, and should be exchanged according to the objective lens used. Can be.

On the other hand, in the illumination device 14, a field stop opening / closing ring 15 for adjusting a field stop (not shown) is provided.
, The field stop scale ring 16 can be detachably fitted. 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) is provided with these positioning holes. Positioning pins 16a and 16b are provided to be locked in the holes 15a and 15b. When the necessary field stop scale ring 16 is mounted on the field stop opening / closing ring 15, the positioning holes 15a and 15b and the positioning pins 16a and 16b Engage with the field stop scale ring 16
Are restricted by the field stop opening / closing ring 15 so as not to rotate relative to each other.

Thus, as a standard specification of the microscope, it is possible to purchase a field stop scale ring as a special specification as needed without having a field stop scale ring, and to mount or replace it as necessary. it can. It is sufficient to read the scale of the field stop scale ring attached by the index 14a of the lighting device.

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 be diametrically opposed to each other. The fine movement scale ring 19 is formed with two positioning projections 19a and 19b corresponding thereto, and when the fine movement scale ring 19 is fitted to the fine movement handle 18, these positioning grooves 18a and 19b are formed.
18b and the positioning projections 19a, 19b engage with each other, so that the fine movement scale ring 19 is restrained by the fine movement handle 18 from rotating relative to each other.

As described above, even if the microscope does not have a fine movement scale ring as a standard specification, a special movement fine adjustment ring may be attached and used as needed. Note that the scale of the fine movement scale ring attached may be read by the index 17a of the coarse movement handle.

Next, the operation of the embodiment will be described.

The user only has to prepare and fit the scale as necessary. The aperture stop scale ring 13 is located along the positioning guides 9a, 9a of the condenser lens, and the field stop scale ring 16 is located at the positioning holes 15a, 15b. And positioning pin 16
a, 16b, and fine movement scale ring 19 are positioning projections 19a, 1
9b and the positioning grooves 18a, 18b are fitted to each other, whereby the positions are restricted.

The aperture stop scale ring 13 can be used for each purpose by preparing a magnification display ring for each series having different numerical apertures of an achromat system or an apochromat system.

Magnification display scale 16c of field stop scale ring
Often indicates a position where a field stop image is narrowed to a size that circumscribes a field ring (not shown) of an eyepiece used for observation. Also, a field stop scale ring indicating the size of the field stop image circumscribing the image sensor of the CCD camera or the DSC camera can be prepared.

The fine movement scale ring 19 is made of a transparent acrylic resin or a polycarbonate resin. When the fine movement scale ring 19c is displayed on the fine movement scale ring 19 by printing a back letter or the like, there is little difference between the fine movement scale index 17a and the index of the coarse movement handle 17a, and it is easy to read.

[0035]

The aperture stop of the condenser lens of the present invention,
In a microscope having at least one of a field stop and a focusing fine-adjustment handle as an adjustable member, a mounting portion is provided for detachably mounting a scale member having a scale corresponding to at least one of the adjustable members. According to the known microscope, by making the state without each of the scale members a standard microscope, a user who does not need the scale can use a standard microscope whose manufacturing cost is reduced and a user who needs the scale. Can provide a microscope with the necessary scales.

In addition, the aperture stop scale ring of the condenser lens can cope with the change of the objective lens used by preparing a plurality of magnification display scales according to the type of the objective lens. By using a magnification display graduation scale circumscribing the visual field ring and a magnification display graduation of an objective lens adapted to an image sensor of a camera used for photographing, it is possible to perform imaging with good contrast.

When each of the detachable scale members is mounted at a predetermined position, the position is determined and constrained, 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 of arrow A of only the condenser lens in FIG. 2;

FIG. 4 is a diagram showing an aperture stop scale ring;

FIG. 5 is an enlarged view of a lighting device part of FIG. 1;

FIG. 6 is a view showing a field stop scale ring;

FIG. 7 is an enlarged view of a focusing handle portion of FIG. 1 and also includes a front view.

FIG. 8 is a view showing a fine movement scale ring;

FIG. 9 is a side view of a conventional microscope.

[Explanation of symbols]

 1 ······ Microscope body 2 ····················································· Turret member 5 ····· ... Objective lens 6 ... Base unit 7 ... Vertical movement mechanism 8 ... Mounting table 9 ... Condenser lens 9a Positioning guide 10 Capacitor receiver 11 Lock screw 12・ ・ ・ Index 13 ・ ・ ・ ・ ・ ・ Aperture scale ring 13a ・ ・ ・ ・ ・ ・ Positioning guide 13b ・ ・ ・ ・ ・ ・ Magnification display scale 14 ・ ・ ・ ・ ・ ・ ・ ・ ・ Illumination device 14a ・ ・ ・・ ・ ・ Indicator 15 ・ ・ ・ ・ ・ ・ Field stop opening / closing ring 15a, 15b ・ ・ ・ Positioning hole 16 ・ ・ ・ ・ ・ ・ Field stop scale ring 16a, 6b ・ ・ ・ Positioning pin 16c ・ ・ ・ ・ ・ ・ Magnification display scale 17 ・ ・ ・ ・ ・ ・ Coarse coarse movement handle 17a ・ ・ ・ ・ ・ ・ Index 18 ・ ・ ・ ・ ・ ・ Focal fine movement handle 18a , 18b ... positioning groove 19 ... fine movement scale ring 19a, 19b ... positioning projection 19c ... fine movement scale

Claims (3)

[Claims] 1. A microscope having at least one of an aperture stop, a field stop, and a focusing fine-adjustment handle as an adjustable member, wherein a scale member provided with a scale corresponding to at least one of the adjustable members is detachable. A microscope, comprising a mounting portion for mounting on a microscope. 2. A condenser lens according to claim 1, wherein said mounting portion corresponding to said scale member of said aperture stop is provided on a condenser lens.
The microscope according to 1. 3. The microscope according to claim 1, wherein the scale of the scale member is formed by printing, engraving, engraving a nameplate, or a multicolor mold.