JP2011209339A - Apparatus for replacing optical filter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical filter replacing device that prevents a connected external optical system device from being vibrated when a filter is replaced and allows easy filter replacement.SOLUTION: The optical filter replacing device includes: a U-shaped adapter which is attached and fixed to the external optical system device and provided with an external optical path window for an optical path of an optical path external optical system on the side face; a filter wheel which is housed in a case with its one end arranged in an opening part of the adapter for replacing and arranging a required filter in the optical path of the external optical system device; a relative position decision means which is arranged between the adapter and the case and is engaged with them during assembly to decide a relative position of the case to the adapter while releasing the engagement during operation of the device; and an external base supporting means which is arranged in the case to support the case by the external base and adjusted in the vertical direction height from the external base.

Description

The present invention relates to an optical filter exchange device.
More specifically, the present invention relates to an optical filter replacement device that automatically replaces an optical filter inserted into an optical system in image acquisition of a microscope or a confocal microscope.
The present invention relates to an optical filter exchanging device that does not give vibration due to filter exchanging to an external optical system device to be connected, and in which the filter can be easily attached and detached.

FIG. 8 is an explanatory diagram showing the configuration of the main part of a conventional example that is generally used.
In the figure, the optical filter exchange device is composed of two parts, a fixed part 26 and a movable part 28 fixed to the external optical system device, and between them is positioned by a pin 52 and a hole 54.
The fixed portion 26 is provided with a hole 58 through which the optical path of the external optical system device passes, and the position reproducibility of the filter can be obtained by the pin 52 when the movable portion 28 is incorporated into the fixed portion 26.

A motor 60 is attached to the movable portion 28 to rotate the wheel 22 equipped with a filter.
The filter is replaced by screwing the fixing cartridge 30 into the wheel 22.
Filter replacement is performed by removing the movable portion 28 from the fixed portion 26.

US 6,313,960 Publication

Such an apparatus has the following problems.
When measuring spectral characteristics, it is necessary to switch the filter at high speed in the optical filter exchange device, but the high-speed rotational movement of the wheel to which the filter is attached gives vibration to the entire external optical system device. There's a problem.

In the conventional example shown in FIG. 8, vibration is generated in the movable portion 28 by the movement of the motor and the wheel.
Since the fixed portion 26 and the movable portion 28 are joined only by the post 52, high rigidity cannot be obtained and vibration is increased.

In addition, there is a problem that stray light from the outside easily enters because the joint portion of the fixed portion 26 and the movable portion 28 is wide and the joint portion of the window 58 is close.
Therefore, it is necessary to attach a movable part to the fixed part for stabilization, and to make a joint part for filter replacement small.

An object of the present invention is to solve the above-described problems, and to provide an optical filter exchange device that does not give vibration due to filter exchange to a connected external optical system device.
It is another object of the present invention to provide an optical filter replacement device that allows easy filter replacement.

In order to achieve such a problem, in the present invention, in the optical filter replacement device of claim 1,
A plurality of filters arranged circumferentially on a plane of a plate-like filter wheel and a necessary filter among the plurality of filters are exchanged and arranged in the optical path of the external optical system device by rotating the filter wheel. In the optical filter exchanging device, an adapter having an outer optical path window that is attached and fixed to the external optical system device and through which an optical path of the optical path external optical system passes is formed in a U shape, and an opening of the adapter accommodated in a case One end portion is disposed in the portion, and a necessary filter is disposed between the adapter wheel and the case, and the filter wheel that is exchanged and disposed in the optical path of the external optical system device. A relative position determining means for determining the relative position of the case and releasing the engagement when the apparatus is in operation; An external base support means vertical height from the external base is adjusted while supported on the base, characterized by comprising a.

In the optical filter replacement device according to claim 2 of the present invention, in the optical filter replacement device according to claim 1,
A filter replacement cover means is provided, which is detachably provided by cutting out the upper part of the case, and a filter in which a part of the filter wheel is exposed and attached at the time of removal can be replaced with another new filter. .

In the optical filter replacement device according to claim 3 of the present invention, in the optical filter replacement device according to claim 1 or 2,
A light-shielding means is provided which is provided on either one of the case and the side surface of the adapter and shields light between the case and the adapter without contacting the other.

In the optical filter replacement device according to claim 4 of the present invention, in the optical filter replacement device according to any one of claims 1 to 3,
The light shielding means is characterized in that a sponge is used.

In the optical filter replacement device according to claim 5 of the present invention, in the optical filter replacement device according to any one of claims 1 to 3,
The light shielding means is characterized by using a bellows.

In the optical filter replacement device according to claim 6 of the present invention, in the optical filter replacement device according to any one of claims 1 to 5,
The relative position determining means includes a positioning hole provided on the adapter insertion end side of the case, and a positioning screw having a positioning pin that is screwed to the bottom surface of the adapter and engages the positioning hole at the tip. It is characterized by that.
It is characterized by that.

In the optical filter replacement device according to claim 7 of the present invention, in the optical filter replacement device according to any one of claims 1 to 6,
The external base support means includes a protrusion provided in the case and protruding in the horizontal direction, a support hole formed in the protrusion in the vertical direction, a height adjustment stand penetrating through the support hole, A set screw hole provided in the protruding portion and a set screw screwed into the set screw hole to fix the height adjusting stand to the protruding portion are provided.

According to claim 1 of the present invention, there are the following effects.
Since the adapter, the motor that is the vibration source, and the case with the filter wheel are supported separately and externally, the motor that is the vibration source and the filter wheel are mechanically separated from the external optical system. In addition, an optical filter exchange device that can perform highly accurate optical measurement and photographing without transmitting vibration to an external optical system device can be obtained.
Since the case including the motor and the filter wheel can be fixed to the outside by the external base support means having high rigidity, an optical filter exchange device that can suppress the occurrence of resonance can be obtained.

  Since the adapter through which the optical path of the external optical system device passes and the case having the filter wheel are separately supported outside, the mechanical accuracy for assembly is as in the case of an integrated type. This is not necessary, the mechanism can be simplified, and an inexpensive optical filter exchange device can be obtained.

According to claim 2 of the present invention, there are the following effects.
The upper part of the case was cut away so as to be detachable. A part of the filter wheel wheel was exposed at the time of removal, and a filter replacement cover means was provided that could replace the attached filter with another new filter.
Therefore, since the filter replacement cover means can be made small, an optical filter replacement device that can easily block the stray light from the outside can be obtained.

The upper area where the front and back sides of the filter wheel are exposed makes it easy to pick and hold both sides of the filter wheel wheel by hand when replacing the filter. A possible optical filter exchange device is obtained.
Since the filter replacement cover means can be removed and the filter number can be easily confirmed, the filter wheel can be moved by turning it manually, and there is no need to move a predetermined filter by a motor. Is obtained.

According to claim 3 of the present invention, there are the following effects.
Provided on one side of the case and the side of the adapter, and non-contact with the other, and provided with a light-shielding means that shields light between the case and the adapter. An optical filter exchange device that can shield light is obtained.

According to claim 4 of the present invention, there are the following effects.
Since the sponge is used as the light shielding means, the sponge is flexible, and both vibration insulation and light shielding can be easily secured, and a commercially available and inexpensive optical filter replacement device can be obtained. .

According to claim 5 of the present invention, there are the following effects.
Since the bellows is used as the light shielding means, the bellows can be made of metal, so that an optical filter exchange device that can obtain higher durability than the sponge can be obtained.
Further, when a powerful laser is used for the external optical system device, an optical filter replacement device without the risk of combustion can be obtained.

According to claim 6 of the present invention, there are the following effects.
The relative position determining means is provided with a positioning hole provided on the adapter insertion end side of the case and a positioning screw having a positioning pin screwed to the bottom surface of the adapter and engaged with the positioning hole at the tip. An optical filter exchange device that can easily determine the relative position between the adapter and the adapter is obtained.

According to claim 7 of the present invention, there are the following effects.
The external base support means includes a projecting portion provided in the case and projecting in the horizontal direction, a support hole drilled in the projecting portion in the vertical direction, a height adjustment stand penetrating through the support hole, and a projecting portion. And a set screw that is screwed into the set screw hole to fix the height adjustment stand to the protruding portion, so that an optical filter that can ensure external support with a simple structure is provided. An exchange device is obtained.

It is principal part structure explanatory drawing of one Example of this invention. It is principal part structure explanatory drawing of FIG. It is operation | movement explanatory drawing of FIG. It is component explanatory drawing of this invention. It is principal part structure explanatory drawing of the other Example of this invention. It is principal part structure explanatory drawing of the other Example of this invention. It is principal part structure explanatory drawing of the other Example of this invention. It is principal part structure explanatory drawing of the other conventional example generally used conventionally.

Hereinafter, the present invention will be described in detail with reference to the drawings.
FIG. 1 is an explanatory diagram of the main part configuration of one embodiment of the present invention, FIG. 2 is an explanatory diagram of the main part configuration of FIG. 1, FIG. 3 is an operation explanatory diagram of FIG.
In the figure, the same symbols as those in FIG. 8 represent the same functions.
Only the difference from FIG. 8 will be described below.

In FIG. 1, reference numeral 1 denotes a filter wheel having a disk shape.
Reference numeral 2 denotes a socket on which the filter 3 is mounted, and is arranged on the circumference of the filter wheel 1 at equal intervals.
The socket 2 is provided with a cylindrical convex portion on the filter wheel 1, a hole through which light passes, a counterbore part into which the filter 3 is dropped, and a female thread for fixing the nut 4 are cut on the side surface of the counterbore part.

In the vicinity of each socket 2, a number indicating an individual socket is engraved.
The normal of the hole of the socket 2 is inclined with respect to the normal of the filter wheel 1 at a specific angle in the range of 5 ° from the vertical. The direction of the inclination is symmetric with respect to the central axis of the filter wheel 1.
The filter 3 is an optical filter and is mounted in the socket 2.

The nut 4 has a donut shape, a male screw corresponding to a female screw cut in the socket 2 is cut on the outer periphery, and a hole through which light passes is provided in the center.
The material of the nut 4 is softer than or equal to the material of the socket 2, and the socket 2 is not worn by the use of the nut 4 a plurality of times, but the nut 4 is worn.

A cover 5 is removed when the filter 3 is replaced. The cover 5 is fixed to the case 6 except when the filter 3 is replaced, and has a sealed structure so that light from the outside does not enter the inside.
The case 6 has a structure that can be divided into two in order to put the filter wheel 1 therein.

Reference numeral 7 denotes a stepping motor or servo motor, which is coupled to the filter wheel 1 in the case 6 and can be stopped at a predetermined angle by external electrical control.
8 and 9 are windows through which the optical path of the external optical system device passes, and are holes formed on both sides of the case 6. The socket 2 of the filter wheel 1 is opened on the circumference where it exists.

The motor 7 can stop the filter wheel 1 at an angle at which the socket 2 coincides with the windows 8 and 9.
Reference numeral 10 denotes a filter replacement notch, which appears when the cover 5 is removed.

11A is an external base support means for fixing the case 6 to the external base at a height at which the optical axis of the external optical system device coincides with the windows 8 and 9.
The external base support means 11 </ b> A has a protruding portion 6 a, a support hole 12, a height adjustment stand 11, a set screw hole 23, and a set screw 24.

The protrusion 6a is provided on the case 6 and protrudes in the horizontal direction.
The support hole 12 is formed in the protrusion 6a in the vertical direction.
The height adjustment stand 11 is provided through the support hole 12.
An elongated hole 29 is provided in the foot 111 at the lower end of the height adjustment stand 11.

The set screw hole 23 is provided in the protrusion 6a.
The set screw 24 is screwed into the set screw hole 23 to fix the height adjusting stand 11 to the protruding portion 6a.

Reference numeral 13 denotes an adapter for positioning the optical filter exchange device with respect to the external optical system device, which has a U shape.
Reference numerals 14 and 15 denote external optical system devices, and light travels between 14 and 15.
16 and 17 are holes formed in the side surface of the adapter 13, and light from the external optical system device passes through these holes.

As shown in FIG. 2, the light shielding means 18 </ b> A is provided on one of the case 6 and the side surface of the adapter 13, and does not contact the other, and shields between the case 6 and the adapter 13.
In this case, two sponges attached around the holes 16 and 17 are used, and the case 6 is mounted therebetween. However, the sponge 18 just contacts the case 6 and is not fixed. In addition, when the case 6 is attached, light from the outside world does not pass through the sponge 18 and reach the holes 16 and 17.

The relative position determining means 19A is provided between the adapter 13 and the case 6, and is engaged with each other during assembly to determine the relative position of the case 6 with respect to the adapter 13, and is disengaged during operation of the apparatus.
The relative position determining means 19 </ b> A has a positioning hole 19 and a positioning screw 27.
In this case, two relative position determining means 19A are used.

The positioning hole 19 is provided on the insertion end side of the adapter 13 of the case 6.
The positioning screw 27 has a knob 28, is screwed onto the bottom surface of the adapter 13, and has a positioning pin 20 that engages with the positioning hole 19 at the tip.
Since the positioning pin 20 is a screw between the positioning pin 20 and the adapter 13, the positioning pin 20 can be fixed at a certain height from the adapter 13 by rotating.

The positioning pin 20 can be inserted into the two positioning holes 19 simultaneously to a predetermined depth.
When the positioning pin 20 is rotated in the reverse direction with the case 6 positioned, the positioning pin 20 is completely separated from the case 6.
FIG. 2 is a cross-sectional view of the optical filter exchange device.
Reference numeral 21 denotes a protrusion provided at one location of the filter wheel 1.

Reference numeral 22 denotes a sensor that mechanically, optically, or magnetically detects the protrusion 21.
With the protrusion 21 and the sensor 22, the arrangement position of the filter 3 in the holes 16 and 17 due to the rotation of the motor 7 can be detected.
Counterbore 25 and 26 are provided at the portion of the case 6 where the sponge 18 fixed to the adapter 13 contacts the case 6.

FIG. 4 shows an apparatus for attaching the filter 3 to the socket 2.
31 is a syringe, and a spring 32 is contained inside.
Reference numeral 33 denotes a suction cup. The outer shape is the same as that of the filter 3, and the suction cup is of a size that does not mechanically contact a portion of the filter 3 that dislikes optically important contamination.

In the above configuration, the filter wheel 1 is exposed by removing the cover 5 from the case 6.
The filter 3 is fixed to the socket 2 using a nut 4.
The filter 3 is adsorbed by pulling the syringe 31 with the spring 32 through the suction cup 33. After the filter 3 is put into the socket 2, the filter 3 is pushed into the socket 2 by pushing the syringe 31 to release the adsorption. To drop.
The cover 5 is attached when the external optical system device is used.

The adapter 13 is attached and fixed to the external optical system device.
In this case, the adapter 13 uses a small screw (not shown) and is fixed to the external optical system.
A ring-shaped sponge 18 is fixed to the adapter 13 by means such as adhesion.

In order to determine the relative position between the adapter 13 and the case 6, the screw 27 is rotated to extend the positioning pin 20, and the case 6 is inserted between the sponges 18.
The position of the case 6 can be determined with respect to the adapter 13 at the position where the positioning pin 20 hits the positioning hole 19.

The entire optical filter exchange device including the case 6 is positioned and installed with respect to the adapter 13.
As shown in FIG. 3, the positioning screw 27 is rotated to completely push the two positioning pins 20 into the U-shape of the adapter 13.
In this state, the case 6 is inserted into the adapter 13 downward from the top of the figure.

  The protrusions 6a on both side surfaces of the case 6 are provided with support holes 12, through which the height adjustment stand 11 is penetrated, and screw holes 23 cut to the support holes 12 from the horizontal direction of the protrusions 6a. The height adjusting stand 11 can be fixed by screwing the push screw 24.

With the two positioning pins 20 inserted in the two positioning holes provided on the bottom surface of the case 6, the set screws 23 of the protruding portions 6a on both side surfaces of the case 6 are loosened, and the height adjustment stand 11 is externally attached. The base table is extended to the base table, and is fixed to an external base table through a screw (not shown) in a long hole 29 provided in the height adjustment stand 11.
Position errors with respect to the screw holes in the base table can be absorbed by rotating the height adjustment stand 11 and using the long holes 29.

  As shown in FIG. 3, in a state where the positioning pin 20 is completely pushed into the U-shape of the adapter 13, the holes 16 and 17 of the adapter and the windows 8 and 9 formed in the case 6 coincide. Thus, the length of the positioning pin 20 is determined.

By positioning with the two positioning holes 19 and the two positioning pins 20, the depth direction, the left-right direction, the up-down direction, and the angle of the case 6 in FIG.
While the case 6 is being inserted into the adapter 13, the case 6 is passed while being deformed while the sponge 18 is in contact with the case 6.

  In the state of being positioned by the positioning hole 19 and the positioning pin 20, the sponge 18 enters the counterbore 25 and 26, does not contact the case 6, does not transmit vibration, and the counterbore portions 25 and 26 and the sponge 18. The maze structure can block out external light.

Further, the depth of the counterbore 25, 26 can be passed through the case 6 by the deformation of the sponge 18, and when positioned, the sponge 18 extends freely to the inside of the counterbore 25, 26, and the case 6 By avoiding contact with vibration, vibration isolation and light shielding can be realized even if a sponge 18 that is difficult to obtain dimensional accuracy is used.
The height adjustment stand 11 is fixed to an external base table, and the height adjustment stand 11 is fixed to the case 6 using a set screw 24.

As shown in FIG. 2, the positioning pin 20 is twisted down and arranged so as to contact the bottom surface of the adapter 13, and the positioning pin 20 is separated from the positioning hole 19 of the case 6.
This prevents the vibration of the case 6 from being transmitted to the external optical system devices 14 and 15 through the positioning pins 20 in a state other than the relative positioning of the case 6 with respect to the adapter 13.

As a result,
Since the adapter 13, the motor 7 that is the vibration generation source, and the case 6 having the filter wheel 1 are separately supported outside, the motor 7 that is the vibration generation source and the filter wheel 1 are connected to the external optical system. An optical filter exchange device that can be mechanically separated from the devices 14 and 15 and does not transmit vibration to the external optical system devices 14 and 15 and can perform high-precision optical measurement and photographing is obtained.

Since the case including the motor and the filter wheel can be fixed to the outside by the external base support means having high rigidity, an optical filter exchange device that can suppress the occurrence of resonance can be obtained.
Since the adapter 13 through which the optical paths of the external optical system devices 14 and 15 pass and the case 6 having the filter wheel 1 are separately and independently supported on the outside, they are assembled together as in the case of an integral type. Therefore, the mechanical accuracy is not required, the mechanism can be simplified, and an inexpensive optical filter exchange device can be obtained.

The upper part of the case 6 is cut away so as to be detachable. A part of the filter wheel 1 is exposed when the case 6 is removed, and a filter 3 and a filter replacement cover means 5 that can be replaced with another new filter 3 are provided. It was.
Therefore, since the filter replacement cover means 5 can be made small, an optical filter replacement device that can easily block the stray light from the outside can be obtained.

Since the upper region where the front and back surfaces of the filter wheel 1 are exposed is used, both sides of the filter wheel 1 can be easily picked and held when replacing the filter 3, so that the filter wheel 1 does not move and is stable. Thus, an optical filter exchange device capable of exchanging the filter is obtained.
Since the filter replacement cover means 5 can be removed and the number of the filter 3 can be easily confirmed, it is possible to move the filter wheel 1 by turning it manually, and there is no need to move the predetermined filter 3 by the motor 7, which is convenient. An optical filter exchange device can be obtained.

  Since the light shielding means for shielding light between the case 6 and the adapter 13 is provided on either one of the case 6 and the side surface of the adapter 13 and not in contact with the other, the vibration isolation between the case 6 and the adapter 13 is provided. Can be secured, and an optical filter exchange device that can easily shield light can be obtained.

  Since the sponge is used as the light shielding means 18, the sponge is flexible, and both vibration insulation and light shielding can be easily secured, and there is a marketable and inexpensively available optical filter replacement device. It is done.

  The relative position determination 19A includes a positioning hole 19 provided on the adapter insertion end side of the case 6, a positioning screw 27 having a positioning pin 20 that is screwed to the bottom surface of the adapter 13 and engages the positioning hole 19 at the tip, Thus, an optical filter exchange device that can easily determine the relative position between the case 6 and the adapter 13 is obtained.

  The external base support means 11A includes a protrusion 6a provided in the case 6 and protruding in the horizontal direction, a support hole 12 formed in the protrusion 6a in the vertical direction, and a height penetrating the support hole 12. Since the adjustment stand 11, the set screw hole 23 provided in the protruding portion 6a, and the set screw 24 that is screwed into the set screw hole 23 and fixes the height adjusting stand 11 to the protruding portion 6a are provided. An optical filter exchange device that can ensure external support with a simple configuration is obtained.

FIG. 5 is an explanatory view showing the configuration of the main part of another embodiment of the present invention.
In FIG. 5, the sponge 41 is provided with a groove 411, and the optical filter exchanging device is provided with a convex portion 42 on the periphery of the windows 8 and 9 of the case 6.
The entrance of light at a shallow incident angle from the outside can be prevented.

FIG. 6 is an explanatory view of the main part configuration of another embodiment of the present invention.
FIG. 6 shows an embodiment in which a bellows 51 is used instead of the sponge 18.
The length of the bellows 51 in the free state is not in contact with the case 6, and the case 6 can be passed in the contracted state.

  Since the bellows 51 can be made of metal, higher durability than the sponge 18 can be obtained. When the laser is passed through the external optical system device, an optical filter exchange device without the risk of combustion can be obtained.

FIG. 7 is an explanatory view of the main part configuration of another embodiment of the present invention.
FIG. 7 shows an embodiment in which a diaphragm 61 is used instead of the sponge 18.
Diaphragm 61 has a hole 611 in the center so that light from external optical system devices 14 and 15 can pass through.

  Further, the periphery 612 of the central hole is thicker than the diaphragm portion. When the case 6 passes through the diaphragm 61, the thick portion 612 contacts the case 6 and the diaphragm is deformed. The thick portion 612 enters the counterbore 25 and 26 and does not contact the case 6.

Since the diaphragm 61 can be made of metal, durability higher than that of the sponge 18 can be obtained.
In addition, the length of the external optical system in the axial direction can be reduced as compared with the bellows 51.
Further, the bellows 51 has a thickness variation and may come into contact with the case 6, but the diaphragm 61 can provide accuracy, so that the possibility of coming into contact with the case 6 is reduced.

The above description merely shows a specific preferred embodiment for the purpose of explanation and illustration of the present invention.
Therefore, the present invention is not limited to the above-described embodiments, and includes many changes and modifications without departing from the essence thereof.

DESCRIPTION OF SYMBOLS 1 Filter wheel 2 Socket 3 Filter 4 Nut 5 Cover 6 Case 6a Protrusion part 7 Motor 8 Window 9 Window 10 Filter replacement notch part 11A External base support means 11 Height adjustment stand 111 Foot part 12 Support hole 13 Adapter 14 External optics System device 15 External optical system device 16 Hole 17 Hole 18A Light shielding means 18 Sponge 19A Relative position determining means 19 Positioning hole 20 Positioning pin 21 Projection 22 Sensor 23 Set screw hole 24 Set screw 25 Counterbore part 26 Counterbore part 27 Positioning screw 28 Knob 29 Long hole 31 Syringe 32 Spring 33 Suction cup 41 Sponge 411 Groove 42 Projection 51 Bellows 61 Diaphragm 611 Hole 612 Thick part

Claims (7)

A plurality of filters arranged circumferentially on a plane of a plate-like filter wheel;
In the optical filter exchange device for exchanging and arranging the necessary filters of the plurality of filters in the optical path of the external optical system device by rotating the filter wheel,
An adapter having an external optical path window attached and fixed to the external optical system device and having an optical path window through which the optical path of the optical path external optical system passes on the side surface;
A filter wheel housed in a case and disposed at one end of the opening of the adapter, and a necessary filter is exchanged in the optical path of the external optical system device; and
A relative position determining means provided between the adapter and the case, which is engaged with each other at the time of assembly to determine the relative position of the case with respect to the adapter, and is disengaged at the time of operation of the apparatus;
An external base support means provided on the case for supporting the case on an external base and adjusting a height in a vertical direction from the external base;
An optical filter exchange device characterized by comprising: A filter replacement cover means is provided which is detachably provided by cutting out the upper part of the case, and a filter in which a part of the filter wheel wheel is exposed and attached when the case is removed and can be replaced with another new filter. The optical filter replacement device according to claim 1. The light-shielding means which shields between the said case and the said adapter, and was provided in any one of the said case and the side surface of the said adapter, and the other is contacted. Optical filter replacement device. The optical filter replacement device according to any one of claims 1 to 3, wherein a sponge is used as the light shielding means. The optical filter replacement device according to claim 1, wherein a bellows is used as the light shielding unit. The relative position determining means includes a positioning hole provided on the adapter insertion end side of the case,
A positioning screw having a positioning pin screwed onto the bottom surface of the adapter and engaged with the positioning hole at the tip;
The optical filter replacement device according to any one of claims 1 to 5, further comprising: The external base support means is provided in the case and protrudes in the horizontal direction,
A support hole drilled in a vertical direction in the protruding portion;
A height adjustment stand penetrating into the support hole;
A set screw hole provided in the protruding portion;
A set screw screwed into the set screw hole to fix the height adjustment stand to the protrusion;
The optical filter exchange device according to any one of claims 1 to 6, further comprising: