JP2006098549A - Microscope - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a microscope which has enhanced dust resistance by simple structure and enables the efficiency of maintenance work thereof to be improved without being influenced by an optical influence. <P>SOLUTION: The microscope is constituted in such a manner that it has an objective lens 26 for observing a sample 2 laid on a stage 3, a half mirror 17 having characteristics of reflecting light from a lamp 701 toward the objective lens 26 and transmitting light from the sample 2 via the objective lens 26 is arranged, a dust-proof glass unit 18 having dust-proof glass 19 for covering at least the upward surface of the half mirror 17 is attachably/detachably provided and the light which transmits the half mirror 17 is observed with an ocular lens 32 as a sample image. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a microscope having a dustproof function.

  Conventional. A so-called metal microscope is used as a microscope for performing crystal confirmation and inspection of a finished product in the production process of a metal product in practical training at a school or in the workplace of a company.

Patent Document 1 shows an example of a microscope used for such a purpose. FIG. 7 shows an inverted microscope, and a stage 102 on which a specimen 101 is placed is arranged above the microscope body 100. A light projection tube 103 having a stop 104 is disposed behind the microscope main body 100. The floodlight 103 is provided with a lamp house 105 having a lamp 105a. The light beam from the lamp 105 a is guided to the microscope main body 100 through the light projecting tube 103, reflected by the half mirror 106, and irradiated on the specimen 101 through the objective lens 108. In this case, a plurality of objective lenses 108 are held by the revolver 107 and are alternatively arranged on the optical axis. Then, the reflected light from the specimen 101 is reflected by the reflecting mirror 109 via the objective lens 108 and the half mirror 106, and is guided to the eyepiece lens 111 via the lens barrel 110 arranged in front of the microscope main body 100, and the enlarged specimen. It can be observed as an image.
JP 2000-131617 A

  By the way, such a microscope is often used by being installed in a place where the environmental conditions are poor such as dust flying around in the processing site of a product. However, in the conventional microscope, no dust-proof measures are taken, and in particular, with respect to the half mirror 106 for folding the light beam from the lamp 105a toward the specimen 101, the revolver 107 and the revolver 107 not shown are supported. The surrounding area of the revolver stand is left open. For this reason, when dust enters the inside of the microscope main body 100, the intrusion from above can be avoided to some extent by the revolver 107 or the revolver base positioned above the half mirror 106. However, for example, when there is an air flow that entrains inside the microscope main body 100, dust may enter through the gap around the half mirror 106 and adhere to the surface of the half mirror 106. This is because if the observation is continued for a long time in this state, the amount of light applied to the sample 101 side from the lamp 105a by the dust adhering to the surface of the half mirror 106, the amount reflected by the sample 101 and reflected through the lens barrel 110 As a result, the amount of light of the image observed with the eyepiece lens 111 is greatly reduced, the observation image becomes dark and difficult to see, and the dust adhering to the half mirror 106 is noticeable when focusing. There were times when it interfered with the alignment.

  Therefore, in order to prevent dust from adhering to the half mirror 106, for example, a dustproof cover that covers the entire lower part of the stage 102 of the microscope main body 100 is conceivable. However, in an inexpensive type microscope in which the revolver 107 is manually rotated, the operability is significantly reduced. In addition, it is conceivable to provide a dustproof cover except for the revolver 107 that performs the rotation operation. However, since the shape of the dustproof cover at this time becomes complicated, there is a problem that it becomes expensive in price. It is done.

  As described above, conventionally, it is difficult to prevent the dust from adhering to the half mirror 106 except for expecting a decrease in operability or using an expensive dustproof cover, and forcing the thin half mirror 106 to force. Wiping off dust on the surface can cause damage. For this reason, in the past, cleaning by an observer was impossible, and there was no choice but to ask the manufacturer service.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a microscope that can improve dustproofness with a simple configuration and can improve maintenance workability without being optically affected. .

The invention according to claim 1 is a stage for placing a specimen, a light source, an objective lens for observing the specimen placed on the stage, and reflecting light from the light source toward the objective lens, An optical path splitting unit having a characteristic of transmitting light from the specimen obtained through a lens, and a dustproof unit having a transparent member covering at least an upper surface of the optical path splitting unit;
And observation means for observing the light transmitted through the optical path dividing means as a sample image.

  According to a second aspect of the invention, in the first aspect of the invention, the optical path dividing means is provided in an optical path dividing block, and the dustproof means is detachably provided in the optical path dividing block.

  According to a third aspect of the present invention, in the second aspect of the present invention, the optical path dividing block further includes a slider insertion portion facing a lower surface of the optical path dividing means, and a dummy slider is inserted into the slider insertion portion. It is characterized by being possible.

  According to a fourth aspect of the present invention, in the second aspect of the present invention, the optical path dividing block further includes a slider insertion portion facing a lower surface of the optical path dividing means, and opens and closes the opening of the slider insertion portion. It has an opening / closing means.

  According to a fifth aspect of the present invention, in the second aspect of the invention, the optical path dividing block further includes a dust-proof means having a transparent member that covers a lower surface of the optical path dividing means. Yes.

  According to a sixth aspect of the present invention, in the first aspect of the invention, the optical path dividing means is provided in an optical path dividing block, and the optical path dividing block is transparent so as to cover an upper surface or a lower surface of the optical path dividing means. It is characterized in that dustproof means having members are provided integrally.

  A seventh aspect of the invention is characterized in that, in the invention according to any one of the first to sixth aspects, the dustproof means comprises a dustproof glass and a dustproof glass unit in which the dustproof glass is integrally provided.

  The invention according to claim 8 is a stage for placing a specimen, a light source, an objective lens for observing the specimen placed on the stage, and reflecting light from the light source toward the objective lens, An optical path splitting unit having a characteristic of transmitting light from the specimen obtained through a lens, and a dustproof cover that is disposed in an optical path between the light source and the optical path splitting unit and accommodates at least various filters. Filter holding means, first and second dustproof means provided to protect the upper and lower surfaces of the optical path splitting means, respectively, and observation means for observing the light transmitted through the optical path splitting means as a sample image It is characterized by comprising.

  The invention according to claim 9 is the invention according to claim 8, wherein the optical path dividing means is provided in an optical path dividing block, and the first and second dustproof means have a transparent member and the optical path dividing block. It is characterized by being detachably provided.

  According to a tenth aspect of the present invention, in the invention according to the eighth aspect, the optical path dividing means is provided in an optical path dividing block, and the optical path dividing block has a slider insertion portion facing a lower surface of the optical path dividing means. The second dust prevention means is characterized in that a dummy slider can be inserted into the slider insertion portion.

  According to an eleventh aspect of the present invention, in the invention according to the eighth aspect, the optical path dividing means is provided in an optical path dividing block, and the optical path dividing block has a slider insertion portion facing a lower surface of the optical path dividing means. The second dustproof means is provided with opening / closing means for opening / closing the opening of the slider insertion portion.

  According to a twelfth aspect of the present invention, in the eighth aspect of the invention, the optical path dividing block is characterized in that the first and second dustproof means are integrally provided.

  A thirteenth aspect of the invention is characterized in that, in the invention of the ninth or twelfth aspect, the dustproof means comprises a dustproof glass and a dustproof glass unit in which the dustproof glass is integrally provided.

  A fourteenth aspect of the invention is characterized in that, in the eighth aspect of the invention, the filter holding means has a lid that is slidable along the optical path.

  According to the present invention, it is possible to provide a microscope capable of improving dustproofness with a simple configuration and improving maintenance workability without being optically affected.

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

(First embodiment)
FIG. 1 shows a schematic configuration of an inverted microscope according to the first embodiment of the present invention.

  In FIG. 1, reference numeral 1 denotes a microscope main body, and a stage 3 on which a specimen 2 is placed is integrally attached above the microscope main body 1 with screws (not shown). The stage 3 is provided with a detachable center stage 4.

  A light source device 5 is provided behind the microscope body 1. The light source device 5 includes an epi-illumination projection tube 6 and a lamp socket 7 that can be attached to and detached from the epi-illumination projection tube 6. The epi-illumination projection tube 6 is composed of tubular hollow members 601, 602, and 603 arranged in the optical axis direction as shown in FIG. Among these members, the hollow member 601 has a flange 601a and is directly fixed to the microscope main body 1 by the flange 601a. The hollow member 601 is provided with an aperture stop 8 on the optical axis. The brightness stop 8 can adjust the amount of light by rotating the lever around the optical axis. The hollow member 602 is integrally connected to the hollow member 601 with a screw or the like, and the frost 9 is provided on the optical axis of the connecting portion with the hollow member 601. The frost 9 smoothes the brightness of light and disperses the concentration of illumination fields in the illumination system. The hollow member 603 is detachably attached to the lamp socket 7 having a lamp 701 as a light source, and is fixed to the hollow member 602 through a cylindrical heat insulating member 10. The hollow member 603 is provided with the collector lens 11 on the optical axis. The collector lens 11 collects light emitted from the lamp 701.

  At the end of the hollow member 601 on the flange 601a side, a filter cylinder 12 is provided as a filter holding means. The filter cylinder 12 is disposed along the same optical axis as the hollow member 601, and a lens 121 that constitutes an optical system that relays light together with the collector lens 11 is disposed on the optical axis of the hollow portion. As shown in FIG. 2B, there are provided groove portions 12a for accommodating various filters 13 in a state inclined at a predetermined angle (for example, about 4 degrees) with respect to the optical axis. Here, the reason why the filter 13 is inclined by a predetermined angle with respect to the optical axis is to remove flare caused by multiple reflection in the optical path (it is out of the field of view). Further, a fitting groove 12b for rotatably supporting the polarizer 14 of the polarizing optical element is also formed in the hollow portion of the filter cylinder 12. The polarizer 14 is used for simple polarized light observation.

  The filter cylinder 12 is provided with a cylindrical filter cover 15 as a lid. The filter cover 15 is provided on the outer periphery of the filter cylinder 12 so as to be slidable along the optical axis direction, and the filter 13 and the polarizer 14 are mounted in the filter cylinder 12 by a sliding operation in the optical axis direction. So that it can be shielded from the outside (see FIG. 2C).

  The filter cylinder 12 is provided with a half mirror block 16 as an optical path dividing block. The half mirror block 16 is provided with a half mirror 17 as optical path dividing means. The half mirror 17 is arranged at an angle of 45 degrees at the intersection of the optical axis of the epi-illumination projection tube 6 and the optical axis of an objective lens 26 described later.

  Above the half mirror block 16, a dustproof glass unit 18 is provided as dustproof means. The dust-proof glass unit 18 is integrally provided with a dust-proof glass 19 inclined at a predetermined angle (for example, about 9 degrees) with respect to the optical axis of the objective lens 26. The reason why the dust-proof glass 19 is tilted by a predetermined angle with respect to the optical axis is to remove flare caused by multiple reflection in the optical path (it has escaped from the field of view).

The dust-proof glass unit 18 is fixed to the half mirror block 16 so as to be detachable (for example, screwed). In addition to screwing, the dust-proof glass unit 18 is fixed to the half mirror block 16 by inserting the dust-proof glass unit 18 into the half-mirror block 16 and then fixing the dust-proof glass unit 18 with a screw. A method of detachably providing the mirror block 16 is conceivable.

  An upright surface 20a of an L-shaped support metal plate 20 is fixed to the rear surface of the half mirror block 16 with screws 21 (see FIGS. 2C and 2D). In the support metal plate 20, the horizontal surface 20 b is also fixed to the lower surface of the half mirror block 16 with screws 21. Further, the support sheet metal 20 is formed with a hole 20c through which a light beam passes through the horizontal plane 20b, and the analyzer 22a (or dummy slider 22b) is formed by a groove (not shown) provided on the horizontal plane 20b and the half mirror block 16 side. A slider insertion portion 16a for insertion is formed. Here, the dummy slider 22b constitutes dustproof means by being inserted into the slider insertion portion 16a, and a slider having a hole without an optical element is used. Also in this case, the analyzer 22a is provided to be inclined at a predetermined angle (for example, about 7 degrees) with respect to the optical axis. The reason why the analyzer 22a is tilted by a predetermined angle with respect to the optical axis is to remove flare caused by multiple reflection in the optical path (it has escaped from the field of view).

  Skirts 23 are provided on both lower sides of the support sheet metal 20. The skirt 23 abuts against the inner bottom surface of the microscope main body 1 to eliminate a gap at this portion, and serves to prevent dust (see FIG. 2D).

  Reference numeral 24 denotes a pin integrated with the half mirror block 16, which functions as a stopper for positioning the analyzer 22a (or dummy slider 22b). Reference numeral 25 denotes a light-shielding cloth for preventing flare attached to the support metal plate 20 in consideration of the fact that there is a light to be transmitted although it is slight in the characteristics of the half mirror 17.

Returning to FIG. 1, an objective lens 26 is disposed below the stage 3. A plurality of objective lenses 26 with different magnifications (only one is shown in the drawing) are held by a revolver 27. The revolver 27 can be rotated, and a plurality of objective lenses 26 are selectively positioned on the optical axis. The revolver 27 is held on the microscope main body 1 via a holding member (not shown) and is moved up and down along the optical axis by operating the focusing handle 28 to change the relative distance between the stage 3 and the objective lens 26. The reflecting mirror 29 is arranged on the optical axis below the revolver 27 through the half mirror 17 disposed at the intersection point with the optical axis of the incident light projection tube 6 described above. Is arranged. The reflection mirror 29 reflects the specimen 2 and reflects the observation image enlarged from the objective lens 26 in an obliquely upward direction (an angle of 45 ° with respect to the horizontal).

  The observation image reflected by the reflection mirror 29 is relayed by the relay optical system 30, enters the eyepiece lens 32 attached to the observation lens barrel 31, and is visually observed by the observer.

  In the figure, reference numeral 33 denotes a dimming volume for ensuring the brightness necessary for the lamp 701.

  Next, the operation of the embodiment configured as described above will be described.

  First, a power switch (not shown) is turned on. Then, the light emitted from the lamp 701 is collected by the collector lens 11 of the hollow member 603 of the incident light projection tube 6, enters the half mirror 17 through the frost 9 and the brightness stop 8, and is reflected by the half mirror 17. Then, the sample 2 on the stage 3 is irradiated through the objective lens 26 attached to the revolver 27. Then, the reflected light from the specimen 2 is incident on the half mirror 17 through the objective lens 26, is now transmitted through the half mirror 17, is reflected by the reflection mirror 29, and is reflected on the eyepiece lens 32 through the relay optical system 30. Incident light is observed and an enlarged specimen image is observed.

  From this state, the brightness of the lamp 701 is adjusted by operating the dimming volume 33, and the revolver 27 is moved up and down along the optical axis by operating the focusing handle 28, whereby the stage 3 and the objective lens 26 are moved. The sample 2 is focused by changing the relative distance. In addition, the specimen 2 on the stage 3 is picked with a fingertip and moved in the X and Y directions to determine a site to be observed. Thereafter, various observations according to the purpose are performed.

  In this case, for example, in order to perform bright field observation, the dummy slider 22b is inserted in advance into the slider insertion portion 16a provided on the lower side of the half mirror block 16 until it contacts the pin 24. Moreover, the polarizer 14 is removed from the filter cylinder 12 (it may remain inserted, but an observation image becomes a little dark). Further, the filter 13 is set if necessary. Then, the filter cover 15 of the filter cylinder 12 is slid to shield the inside of the filter cylinder 12 from the outside.

  In order to perform simple polarized light observation, the analyzer 22a is inserted into the slider insertion portion 16a provided on the lower side of the half mirror block 16 in place of the dummy slider 22b until it comes into contact with the pin 24. Further, the polarizer 14 is set in the filter cylinder 12. Further, the filter 13 is set if necessary. Then, while looking into the eyepiece lens 32, the polarizer 14 is rotated to search for a place where the field of view becomes the darkest (set to the crossed Nicols state). Thereafter, the filter cover 15 of the filter cylinder 12 is slid to shield the inside of the filter cylinder 12 from the outside.

  Therefore, according to such a configuration, even when used in a place with poor environmental conditions such as dust scattered around, a dustproof glass unit having the dustproof glass 19 on the upper part of the half mirror 17. Since 18 is provided, dustproofness can be improved with a simple configuration, and dust entering from above the half mirror 17 can be reliably prevented. Further, by inserting the analyzer 22a (or the dummy slider 22b) into the slider insertion portion 16a formed in the half mirror block 16, the slider insertion portion 16a, which has been left open during the bright field observation, can be half-opened. Dust entering the lower part of the mirror 17 can also be reliably prevented. In other words, by inserting the dummy slider 22b during bright-field observation, it is possible to minimize the intrusion of dust, and to ensure a bright observation image that is not optically affected and has no deterioration. it can. Further, the filter cylinder 12 that houses the various filters 13 and the polarizer 14 is also provided with a filter cover 15 so that the inside of the filter cylinder 12 can be shielded from the outside by the filter cover 15. It is also possible to prevent dust from entering the body 12.

  On the other hand, when dust adheres to the surfaces of the various filters 13 and the polarizers 14 and the dust-proof glass 19 inside the filter cylinder 12 and the observation image is affected, cleaning is performed by the observer according to the following procedure. By doing so, it is possible to easily return to the original state.

  For the various filters 13 and the polarizer 14 inside the filter cylinder 12, the filter cover 15 may be opened, the filter 13 and the polarizer 14 may be removed from the filter cylinder 12, and the respective stains may be wiped off.

  Next, in the case of the dustproof glass 19, for example, as shown in FIG. 3A, first, the specimen 2 on the stage 3 is removed and the middle stage 4 is removed. Next, the objective lens 26 is removed from the revolver 27. Next, the revolver 27 is adjusted so that the hole portion (objective lens mounting hole) 27a of the revolver 27 after removing the objective lens 26 faces almost directly above, and then, from this hole portion 27a, as a cleaning member, for example, The cotton swab 34 is inserted, and the dust adhered to the surface of the dust-proof glass 19 is wiped off by the cotton portion 34a at the tip of the cotton swab 34. If the surface of the dust-proof glass 19 is very dirty, as shown in FIG. 3B, after removing the specimen 2 on the stage 3 and removing the center stage 4, the revolver 27 is moved to the uppermost position. Thus, a large space is formed between the revolver 27 and the half mirror block 16, and the dustproof glass unit 18 is removed from the half mirror block 16 using this space, and the dust adhered to the surface of the dustproof glass 19 is taken out to the outside. Try to wipe it off.

  In this way, the observer can easily clean the various filters 13 in the filter cylinder 12, the polarizer 14, and the dust-proof glass 19, and the maintenance workability can be improved. The observation image can be observed in an optimum state.

(Modification)
In the first embodiment, during bright field observation, a dummy slider 22b is inserted below the half mirror 17 to prevent dust from entering, but a method of covering with a shutter member instead of the dummy slider 22b is also possible. Conceivable.

  In this case, in FIGS. 4A to 4D, the same parts as those in FIG. The slider insertion portion 16a is provided with a movable shutter 35 as an opening / closing means constituting a dustproof means. One end of the movable shutter 35 is supported by the half mirror block 16 so as to be rotatable. A knob 36 is integrally provided on the rotation support portion of the movable shutter 35. The knob 36 can be rotated integrally with the movable shutter 35 by a screw 361 screwed into the half mirror block 16, and the opening of the slider insertion portion 16 a is opened and closed by the movable shutter 35 by rotating the knob 36. It can be done. In this case, the movable shutter 35 is set with torque in the rotational direction, and does not move due to its own weight. A stopper pin 37 is provided in the rotating direction of the movable shutter 35. The stopper pin 37 regulates the rotational position of the movable shutter 35. On the other hand, the half mirror block 16 is provided with a hidden plate 38 on the side surface opposite to the slider insertion portion 16a. The hidden plate 38 is for preventing dust from entering from the side surface opposite to the slider insertion portion 16a.

  Others are the same as in FIG.

  In such a configuration, when performing bright field observation, the knob 36 is turned so that the movable shutter 35 closes the opening of the slider insertion portion 16a. By so doing, it is possible to prevent the intrusion of dust from the slider insertion portion 16a without using the dummy slider 22b described in the first embodiment. When performing simple polarization observation, the knob 36 is operated to rotate the movable shutter 35 until it abuts against the stopper pin 37, and the analyzer 22a is inserted from the slider insertion portion 16a.

  Accordingly, in this way, during bright field observation, the opening of the slider insertion portion 16a can be closed by the movable shutter 35, so that the intrusion of dust can be minimized without using the dummy slider 22b. And a bright observation image without deterioration can be secured. The dummy slider 22b is a separate part and may be lost. However, if the movable shutter 35 is used, there is no such concern and the operability can be improved.

(Second Embodiment)
Next, a second embodiment of the present invention will be described.

  FIG. 5 shows a schematic configuration of an inverted microscope according to the second embodiment of the present invention, and FIG. 6 shows a schematic configuration of an epi-illumination projection tube of the inverted microscope. In FIG. 5 and FIG. The same reference numerals are given.

  In this case, a dust-proof glass unit 51 as dust-proof means is provided in place of the slider insertion portion 16a for inserting the analyzer 22a (or the dummy slider 22b) provided on the lower side of the half mirror block 16. The dust-proof glass unit 51 is integrally provided with a dust-proof glass 52 that is inclined at a predetermined angle (for example, about 9 degrees) with respect to the optical axis of the objective lens 26. The reason why the dust-proof glass 52 is tilted by a predetermined angle with respect to the optical axis is to remove flare caused by multiple reflection in the optical path (it has escaped from the field of view).

  The dust-proof glass unit 51 is fixed to the half mirror block 16 so as to be detachable (for example, screwed). In addition to screwing, the dustproof glass unit 51 is fixed to the half mirror block 16 by screwing the dustproof glass unit 51 into the half mirror block 16 and then fixing the dustproof glass unit 18 with a magnet. A method of detachably providing the mirror block 16 is conceivable.

  Further, the filter cylinder 12 attached to the hollow member 601 of the epi-illumination projection tube 6 is one in which the fitting groove 12b for rotatably supporting the polarizer 14 is omitted.

  Others are the same as FIG. 1 and FIG.

  In this way, the half mirror block 16 is provided with the dustproof glass units 18 and 51 in the vertical direction, and the incident light projection tube 6 side is also covered with the light source side lens or the like. It is possible to almost completely prevent dust from adhering to the lower surface. Further, even when dust adheres to the dustproof glass units 18 and 51 in the vertical direction, the dustproof glass units 18 and 51 can be removed from the half mirror block 16 by the user, so that they can be easily cleaned. .

  In such a configuration, the polarizer 14 and the analyzer 22a described in the first embodiment are removed, so that the observation method is only bright field observation.

  In addition, this invention is not limited to the said embodiment, In the implementation stage, it can change variously in the range which does not change the summary. For example, in the above-described embodiment, the half mirror 17 is described. However, the half mirror 17 here includes other optical elements such as a half mirror, a dichroic mirror, and a beam splitter, which are usually referred to.

  In the above-described embodiment, the dummy slider 22b is a hole, but in order to prevent dust from entering from below the half mirror 17, a glass plate fitted therein may be used. good. In this way, the dustproof performance can be improved to the same level as when the analyzer 22a is inserted.

  Furthermore, in the above-described embodiment, a separately prepared dust-proof glass unit 18 is mounted above the half mirror block 16, but these do not need to be provided separately, and the half having the half mirror 17. The dust-proof glass 19 may be directly attached to the mirror block 16. In this way, it is preferable to use the space rather than disposing the separate dustproof glass unit 18 in the small gap between the revolver 27 and the half mirror 17. The same applies to the dust-proof glass unit 51 provided below the half mirror block 16.

  Furthermore, in the above-described embodiment, the cylindrical filter cover 15 that slides along the optical axis direction is provided on the outer periphery of the filter cylinder 12, but it is possible to prevent dust from entering the filter cylinder 12. If it is a thing aiming at, the thing of a simple lid | cover shape or a slide cover which moves along the circumferential direction of filter cylinder 12 outer periphery may be sufficient.

  Furthermore, in the above-described embodiment, the half mirror 17 has been described as the optical path splitting means. However, a dichroic mirror or a polarization beam splitter may be used as long as the optical path can be split other than the half mirror 17. Further, the observation means may be a camera other than the visual observation means.

  In addition, the above embodiments include inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements. For example, even if some constituent requirements are deleted from all the constituent requirements shown in the embodiment, the problem described in the column of the problem to be solved by the invention can be solved, and is described in the column of the effect of the invention. If the above effect is obtained, a configuration from which this configuration requirement is deleted can be extracted as an invention.

The figure which shows schematic structure of the inverted microscope concerning the 1st Embodiment of this invention. The figure which shows schematic structure of the epi-illumination projection tube used for the inverted microscope of 1st Embodiment. The figure for demonstrating the leaning method of the dustproof unit used for the inverted microscope of 1st Embodiment. The figure which shows schematic structure of the principal part of the modification of the inverted microscope of 1st Embodiment. The figure which shows schematic structure of the inverted microscope concerning the 2nd Embodiment of this invention. The figure which shows schematic structure of the epi-illumination projection tube used for the inverted microscope of 2nd Embodiment. The figure which shows schematic structure of the conventional microscope.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Microscope main body, 2 ... Specimen 3 ... Stage, 4 ... Center stage 5 ... Light source device, 6 ... Epi-illumination projection tube 601-603 ... Hollow member, 601a ... Flange 7 ... Lamp socket, 701 ... Lamp 8 ... Brightness Diaphragm, 9 ... Frost, 10 ... Thermal insulation member 11 ... Collector lens, 12 ... Filter cylinder 12a ... Groove, 12b ... Fitting groove 121 ... Lens, 13 ... Filter 14 ... Polarizer, 15 ... Filter cover 16 ... Half mirror block, 16a ... Slider insertion portion 17 ... Half mirror, 18 ... Dust-proof glass unit 18 ... Dust-proof glass unit, 19 ... Dust-proof glass 20 ... Support metal plate, 20a ... Upright surface, 20b ... Horizontal surface 20c ... Hole, 21 ... Screw 22a ... Analyzer, 22b ... dummy slider 23 ... skirt, 24 ... pin 25 ... light shielding cloth, 26 ... objective lens 27 Revolver 28 ... Focusing handle 29 ... Reflection mirror 30 ... Relay optical system 31 ... Observation lens tube 32 ... Eyepiece lens 33 ... Light control volume 34 ... Cotton swab 34a ... Cotton part 35 ... Movable shutter 36 ... Knob, 361 ... Screw 37 ... Stopper pin, 38 ... Hidden plate 51 ... Dust-proof glass unit, 52 ... Dust-proof glass

Claims (14)

A stage for placing the specimen;
A light source;
An objective lens for observing the specimen placed on the stage;
An optical path splitting unit having a characteristic of reflecting light from the light source toward the objective lens and transmitting light from the sample obtained through the objective lens;
Dustproof means having a transparent member covering at least the upper surface of the optical path dividing means;
Observation means for observing the light transmitted through the optical path dividing means as a sample image;
A microscope comprising: The optical path dividing means is provided in an optical path dividing block,
The microscope according to claim 1, wherein the dustproof means is detachably provided on the optical path dividing block. 3. The microscope according to claim 2, wherein the optical path dividing block is provided with a slider insertion portion facing a lower surface of the optical path dividing means, and a dummy slider can be inserted into the slider insertion portion. 3. The microscope according to claim 2, wherein the optical path dividing block further includes an opening / closing means provided with a slider insertion portion so as to face a lower surface of the optical path dividing means, and opening / closing the opening of the slider insertion portion. The microscope according to claim 2, wherein the optical path dividing block further includes a dustproof means having a transparent member that covers a lower surface of the optical path dividing means. The optical path dividing means is provided in an optical path dividing block,
2. The microscope according to claim 1, wherein the optical path dividing block is integrally provided with dustproof means having a transparent member covering an upper surface or a lower surface of the optical path dividing means. The microscope according to any one of claims 1 to 6, wherein the dustproof means includes a dustproof glass and a dustproof glass unit in which the dustproof glass is integrally provided. A stage for placing the specimen;
A light source;
An objective lens for observing a specimen placed on the stage;
An optical path splitting unit having a characteristic of reflecting light from the light source toward the objective lens and transmitting light from the sample obtained through the objective lens;
A filter holding means provided with a dustproof cover that is disposed in an optical path between the light source and the optical path dividing means and accommodates at least various filters;
First and second dustproof means provided to protect the upper and lower surfaces of the optical path dividing means, respectively,
Observation means for observing the light transmitted through the optical path dividing means as a sample image;
A microscope comprising: The optical path dividing means is provided in an optical path dividing block,
9. The microscope according to claim 8, wherein the first and second dustproof means include a transparent member and are detachably provided on the optical path dividing block. The optical path dividing means is provided in an optical path dividing block,
The optical path dividing block is provided with a slider insertion part facing a lower surface of the optical path dividing means, and the second dustproof means is capable of inserting a dummy slider into the slider insertion part. Item 9. The microscope according to Item 8. The optical path dividing means is provided in an optical path dividing block,
The optical path dividing block is provided with a slider insertion part facing a lower surface of the optical path dividing means, and the second dustproof means has an opening / closing means for opening and closing an opening of the slider insertion part. The microscope according to claim 8. 9. The microscope according to claim 8, wherein the optical path dividing block is provided with the first and second dustproof means integrally. The microscope according to claim 9 or 12, wherein the dustproof means includes a dustproof glass and a dustproof glass unit in which the dustproof glass is integrally provided. The microscope according to claim 8, wherein the filter holding unit includes a lid portion that is slidable along the optical path.

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