Multiband light source switching mechanism, application method thereof and microscope equipment

Abstract

The invention provides a multiband light source switching mechanism, a using method thereof and microscope equipment. The multiband light source switching mechanism comprises a base, a plurality of light-emitting assemblies capable of providing light sources with different wavelengths and a first optical piece, the first optical piece is arranged on light-emitting paths of the light-emitting assemblies and used for reflecting and transmitting specified light beams, and the light-emitting ends of the two light-emitting assemblies can be driven by an external force to cut out of a center hole. Or, the central hole is cut in, so that the reflected and transmitted light is emitted along the first direction and the second direction respectively. The multiband light source switching mechanism can be applied to illumination modules of microscope equipment and the like, rapid switching of light sources with different wavelengths can be achieved, when the light outlet end of one light-emitting assembly is cut out, the light outlet end of the other light-emitting assembly can be prepared to be cut into the center hole, and the time needed for switching the light sources is shortened.

Description

Technical Field

[0001] The present invention relates to a light source switching device, in particular to a multi-band light source switching mechanism, a use method thereof and a microscope device, belonging to the technical field of electron microscope light source illumination. Background Art

[0002] Currently, in order to achieve illumination under various wavelengths of light, microscopes are equipped with multiple light-emitting modules, and various light-emitting modules are switched manually; similarly, electron microscopes are also equipped with multiple light-emitting modules, and various light-emitting modules are switched electrically.

[0003] The most commonly used electric switching method at present is to arrange the light-emitting modules in a row, install them on the same guide rail and use a motor to drive them. They can move different distances as needed to switch to the corresponding light-emitting modules. However, in actual use, this method requires a long switching time between the first light-emitting component and the second light-emitting component, and the switching rate required for its use cannot be guaranteed. Summary of the invention

[0004] In view of the deficiencies in the prior art, an object of the present invention is to provide a multi-band light source switching mechanism so as to shorten the switching time of the light emitting component and increase the switching rate to meet actual needs.

[0005] To achieve the aforementioned purpose of the invention, the present invention provides a multi-band light source switching mechanism, comprising a base, a plurality of light-emitting components capable of providing light sources of different wavelengths, and a first optical component, wherein a center hole is arranged at a selected position of the base, the light-emitting component is arranged on the base, and can move along a selected trajectory on the base, and the selected position is simultaneously located on the moving trajectory of the plurality of light-emitting components, the first optical component is arranged on the light-emitting path of the light-emitting component and is used to reflect and transmit a specified light beam, and the light-emitting ends of the two light-emitting components can cut out a center hole under the driving force of an external force, or cut into the center hole so that the reflected and transmitted light are emitted in a first direction and a second direction respectively.

[0006] Another aspect of the present invention provides a method for using the multi-band light source switching mechanism, that is, a light source switching method, comprising:

[0007] Control the light-emitting end of one of the light-emitting components to cut into the central hole, so that the light beam is reflected by the first optical component and then emitted to the object to be measured along the first direction, and the light reflected by the object to be measured is transmitted by the first optical component and then emitted along the second direction;

[0008] The light emitting end of the previous light emitting component is controlled to cut out the central hole, and the light emitting end of the light emitting component of another wavelength is controlled to cut into the central hole.

[0009] Still another aspect of the present invention provides a microscope device, comprising an illumination module, wherein the illumination module comprises the multi-band light source switching mechanism.

[0010] Compared with the prior art, the advantages of the present invention include:

[0011] 1) In the present invention, a multi-band light source switching mechanism can realize the rapid switching of light sources of different wavelengths, and when the light-emitting end of one light-emitting component is cut out, the light-emitting end of another light-emitting component can be ready to cut into the center hole, thereby shortening the time required for switching the light source;

[0012] 2) In the present invention, the first connection part and the second connection part can be disassembled and assembled, that is, the second connection part or the first connection part in the device can be replaced according to actual needs;

[0013] 3) In the present invention, a light source switching method adopts the multi-band light source switching mechanism to achieve rapid switching of multiple light sources with different wavelengths. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of a multi-band light source switching mechanism provided by a typical embodiment of the present invention;

[0015] Figure 2 yes Figure 1 A local enlarged schematic diagram of the middle A;

[0016] Figure 3 is a top view of a multi-band light source switching mechanism provided by a typical embodiment of the present invention;

[0017] Figure 4 yes Figure 3 Middle BB section;

[0018] Figure 5 A light emitting component is provided in a typical embodiment of the present invention;

[0019] Explanation of the reference numerals: 1. base; 11. center hole; 2. light-emitting component; 21. first connecting portion; 211. first slope; 23. second connecting portion; 231. second slope; 241. groove; 242. buckle groove; 3. guide rail; 4. switching component; 41. guide rod; 42. connecting member; 43. rotating seat; 5. mounting seat; 6. image acquisition mechanism; 7. object to be measured; 8. first optical component; 9. second optical component. DETAILED DESCRIPTION

[0020] In view of the deficiencies in the prior art, the inventor of this case has proposed the technical solution of the present invention after long-term research and extensive practice. The technical solution, its implementation process and principle will be further explained as follows.

[0021] On the one hand, the present invention provides a multi-band light source switching mechanism, including a base, a plurality of light-emitting components capable of providing light sources of different wavelengths, and a first optical component, wherein a center hole is arranged at a selected position of the base, the light-emitting component is arranged on the base, and can move along a selected trajectory on the base, and the selected position is simultaneously located on the moving trajectory of the plurality of light-emitting components, the first optical component is arranged on the light-emitting path of the light-emitting component and is used to reflect and transmit a specified light beam, and the light-emitting ends of the two light-emitting components can cut out a center hole under the driving force of an external force, or cut into the center hole so that the reflected and transmitted light are emitted in a first direction and a second direction respectively.

[0022] In a specific embodiment, a multi-band light source switching mechanism includes a plurality of light-emitting components, and the plurality of light-emitting components are sequentially arranged along the circumferential direction of the base.

[0023] In a specific embodiment, the light emitting component can make the light emitting end cut into or out of the center hole through a switching component. The switching component includes a guide rod. The light emitting component is movably arranged on the guide rod and can move along the axis direction of the guide rod.

[0024] In a specific embodiment, the switching component includes a connecting member and a rotating seat, the connecting member is arranged on the light-emitting component, the rotating seat is movably arranged on the connecting member, and at least a portion of the rotating seat is threadedly connected to the guide rod, and the rotating seat can move along the length direction of the guide rod.

[0025] In a specific embodiment, the light-emitting component includes the first connecting part, the second connecting part and the laser generating part, the first connecting part has a first light outlet and a first optical cavity which are interconnected, the second connecting part has a second light outlet and a second optical cavity which are interconnected, the laser generating part is arranged in the first optical cavity, the first optical element is arranged between the first optical cavity and the second optical cavity, and one of the first light outlet and the second light outlet is at least used to make the reflected light emerge along the first direction, and the other is used to make the transmitted light emerge along the second direction.

[0026] In a specific embodiment, the first connection part is detachably connected to the second connection part.

[0027] In a specific embodiment, the first connecting portion has a first slope surface, the second connecting portion has a second slope surface, and at least parts of the first slope surface and the second slope surface abut against each other to connect the first optical cavity with the second optical cavity.

[0028] In a specific embodiment, a groove is arranged on the first slope surface and / or the second slope surface, and the first optical element is arranged in the groove.

[0029] In a specific embodiment, a placement space is formed between the first slope surface and the second slope surface, and the first optical component is arranged in the placement space.

[0030] In a specific embodiment, a groove is provided on the first slope surface and / or the second slope surface, and the first optical component is arranged in the groove; a placement space is formed between the first slope surface and the second slope surface, and the first optical component is arranged in the placement space.

[0031] In a specific embodiment, the multi-band light source switching mechanism includes a second optical component, and the second optical component is disposed in the first optical cavity.

[0032] In a specific embodiment, the multi-band light source switching mechanism includes a second optical component, and the second optical component is disposed in the second optical cavity.

[0033] In a specific embodiment, the multi-band light source switching mechanism includes a second optical component, and the second optical component is arranged in the first optical cavity and the second optical cavity.

[0034] On the other hand, the present invention also provides a method for using a multi-band light source switching mechanism, which is implemented by using the multi-band light source switching mechanism, and the method includes:

[0035] Control the light-emitting end of one of the light-emitting components to cut into the central hole, so that the light beam is reflected by the first optical component and then emitted to the object to be measured along the first direction, and the light reflected by the object to be measured is transmitted by the first optical component and then emitted along the second direction;

[0036] The light emitting end of the previous light emitting component is controlled to cut out the central hole, and the light emitting end of the light emitting component of another wavelength is controlled to cut into the central hole.

[0037] The technical solution, its implementation process and principles, etc. will be further explained below in conjunction with the accompanying drawings and specific implementation cases. Unless otherwise specified, the guide rails, dichroic mirrors, filters, etc. used in the embodiments of the present invention are components known to those skilled in the art, which can be purchased commercially, and their specific structures and models are not limited here.

[0038] Example 1

[0039] See also Figure 1, is a multi-band light source switching mechanism provided in this embodiment, comprising a base 1, a plurality of light-emitting components 2 capable of providing light sources of different wavelengths, and a first optical member 8, a center hole 11 is provided at a selected position of the base 1, the light-emitting component 2 is provided on the base 1, and can move along a selected trajectory on the base 1, and the selected position is simultaneously located on the activity trajectory of the plurality of light-emitting components 2, the first optical member 8 is provided on the light-emitting path of the light-emitting component 2 and is used to reflect and transmit a specified light beam, and the light-emitting ends of the two light-emitting components 2 can cut out the center hole 11 under the driving force of an external force, or cut into the center hole 11 so that the reflected and transmitted light are emitted in a first direction and a second direction respectively. It can be understood that when in use, the first optical component can be a dichroic mirror, wherein the light-emitting end of a light-emitting component 2 can cut into the central hole 11 under the driving force of an external force, and the excitation light in the light-emitting component 2 is emitted to the dichroic mirror, and the dichroic mirror can reflect light below a specified wavelength. The dichroic mirror used in this embodiment can reflect light with a wavelength less than 510nm and transmit light with a wavelength greater than 510nm, so that the light beam with a wavelength less than 510nm is reflected from the central hole 11 along the first direction and emitted to the object to be measured. Please refer to Figure 4 , the first direction and the second direction can be parallel to the axis of the center hole, and the first direction is opposite to the second direction. After the object to be measured is irradiated by light, it is excited to generate light with a wavelength above 510nm. The reflected light passes through the dichroic mirror, and the light with a wavelength greater than 510nm is emitted along the second direction. An image acquisition mechanism 6 can be used to collect or observe the corresponding image. When it is necessary to switch to the next light-emitting component 2 with a light source of a different wavelength, the previous light-emitting component 2 can be moved along the selected active trajectory so that its light-emitting end cuts out the center hole 11, and the light-emitting end of the light-emitting component to be switched is moved to the specified position along the selected trajectory so that its light-emitting end cuts into the center hole 11, which can realize the rapid switching of the light-emitting components.

[0040] In this embodiment, at least two light-emitting components 2 are arranged on the base 1, and the two light-emitting components 2 can provide light sources of different wavelengths. When switching is required, the light-emitting end of one of the light-emitting components 2 is cut out from the center hole, and then the light-emitting end of the other light-emitting component 2 is cut into the center hole, so that fast switching of light sources of different wavelengths can be achieved. When the light-emitting end of one light-emitting component 2 is cut out, the light-emitting end of the other light-emitting component 2 can be ready to be cut into the center hole, thereby shortening the time required to switch the light source.

[0041] For further information, see Figure 1, the multi-band light source switching mechanism includes a plurality of light-emitting components 2, and the plurality of light-emitting components 2 are arranged in sequence along the circumferential direction of the base 1. The light-emitting end of the light-emitting component 2 is arranged near one side of the center hole, and the plurality of light-emitting components 2 can provide light sources of different wavelengths, and the distances between the plurality of light-emitting components 2 and the axis of the center hole can be the same, that is, the moving distance of each light-emitting component 2 can be the same, and when the light-emitting end of a light-emitting component 2 cuts out from the center hole, the light-emitting end of another light-emitting component 2 can cut into the center hole in time. Compared with the common "arranging each light-emitting module in a row, installing it on the same guide rail 3 and using a motor drive", the light-emitting components 2 have the same travel speed, and the light-emitting ends of different light-emitting components 2 can be configured as a coherent action when cutting in or out, that is, one light-emitting component 2 cuts out and another light-emitting component 2 cuts in, so as to achieve the effect of quickly switching the light source, thereby realizing the switching of multi-channel light sources of different wavelengths and improving work efficiency.

[0042] More specifically, the bottom surface of the light emitting component 2 is a plane, and the plane is in contact with the base 1. When the light emitting component 2 moves along the cutting-in or cutting-out direction, the light emitting component 2 can be prevented from rotating.

[0043] More specifically, the multi-band light source switching mechanism further comprises a guide rail 3, which is disposed on the base 1, and at least part of the light emitting component 2 is movably matched with the guide rail 3, so that the light emitting component 2 can move along the guide rail 3. Figure 1 ,like Figure 1 As shown, the light-emitting component 2 can move along the length direction of the guide rail 3, thereby realizing directional movement of the light-emitting component 2, so that the light-emitting end of the light-emitting component 2 can cut into or out of the center hole along a specified direction, and this specified direction can be the length direction of the guide rail 3.

[0044] More specifically, the light emitting assembly 2 is slidably matched with the guide rail 3. That is, the light emitting assembly 2 can slide on the guide rail 3, which can reduce the friction between the light emitting assembly 2 and the guide rail 3, so as to facilitate the rapid switching in or out of the light emitting assembly 2 and improve its switching speed.

[0045] More specifically, the guide rail 3 is detachably arranged on the base 1. If the guide rail 3 needs to be replaced or the light-emitting component 2 needs to be added, the guide rail 3 can be disassembled and arranged and assembled according to actual needs, thereby improving the adaptability of the multi-band light source switching mechanism provided in this embodiment.

[0046] Furthermore, the light emitting component 2 can make the light emitting end cut into or out of the central hole 11 through a switching component 4. The switching component 4 includes a guide rod 41. The light emitting component 2 is movably arranged on the guide rod 41 and can move along the axial direction of the guide rod 41.

[0047] More specifically, the light emitting assembly 2 can move under the joint action of the guide rod 41 and the guide rail 3, and can constrain the travel path of the light emitting assembly 2 so that it cuts in or out along a specified direction.

[0048] More specifically, the base 1 is polygonal, the central hole is arranged at the center of the base 1 , and the plurality of light-emitting components 2 are evenly distributed in a centrally symmetrical manner with the center of the base 1 as the center.

[0049] The multi-band light source switching mechanism of this embodiment can be applied in an illumination module of an electron microscope device.

[0050] Example 2

[0051] See also Figure 2-Figure 3 , a multi-band light source switching mechanism provided in this embodiment, its structure is basically similar to that of embodiment 1, except that: the light emitting component 2 includes the first connecting part 21, the second connecting part 23 and the laser generating part, the first connecting part 21 has a first light outlet and a first optical cavity connected to each other, the second connecting part 23 has a second light outlet and a second optical cavity connected to each other, the laser generating part is arranged in the first optical cavity, the first optical element 8 is arranged between the first optical cavity and the second optical cavity, one of the first light outlet and the second light outlet is at least used to make the reflected light emit in the first direction, and the other is used to make the transmitted light emit in the second direction. Please refer to Figure 1-Figure 3 , the laser generating unit can emit laser light in one direction, and the first optical element is arranged between the first optical cavity and the second optical cavity. The light passes through the first optical cavity and is emitted to the first optical element 8, and the light reflected by the first optical element 8 is emitted to the object to be measured 7 in the first direction through the first light outlet, and the light reflected by the object to be measured passes through the first optical cavity and the second optical cavity in sequence and is emitted from the second light outlet in the second direction, and an image acquisition mechanism 6 can be used to collect or observe the corresponding image at the second light outlet.

[0052] Furthermore, the first connection part 21 is detachably connected to the second connection part 23, so that the combination of the two can be easily installed or removed.

[0053] Furthermore, the first connecting portion 21 has a first slope 211, the second connecting portion 23 has a second slope 231, and at least a portion of the first slope 211 and the second slope 231 abut against each other to connect the first optical cavity with the second optical cavity. Figure 3The first connection part 21 and the second connection part 23 can be disassembled and assembled, that is, the second connection part 23 or the first connection part 21 in the device can be replaced according to actual needs. During installation, the first slope 211 of the first connection part 21 and the second slope 231 of the second connection part 23 are abutted against each other and fixed to facilitate the assembly of the two.

[0054] Furthermore, the first slope surface 211 is formed on the top of the first connection portion 21 , and the first connection portion 21 has a top surface and a bottom surface connected to the first slope surface 211 .

[0055] Furthermore, the second slope surface 231 is formed at the bottom of the second connection portion 23 , and the second connection portion 23 has a top surface and side surfaces connected to the second slope surface 231 .

[0056] Furthermore, the first slope 211 is formed at the top of the first connecting portion 21, and the first connecting portion 21 has a top surface and a bottom surface connected to the first slope 211; the second slope 231 is formed at the bottom of the second connecting portion 23, and the second connecting portion 23 has a top surface and a side surface connected to the second slope 231.

[0057] Specifically, the angle between the first slope 211 and the bottom surface is 45°, and the angle between the second slope and the top surface is 45°, which can facilitate the installation and removal of the dichroic mirror.

[0058] Further, a groove 241 is provided on the first slope 211 and / or the second slope 231, and the first optical element 22 is disposed in the groove 241. It is understandable that a groove 241 is provided on at least one of the first slope 211 and the second slope 231, see Figure 3 The first optical component 22 can be placed in the groove 241, that is, the first optical component 22 can be limited by the groove 241, so as to fix the first optical component 22 and avoid shaking or dislocation due to unstable placement during movement, which affects the normal use of the multi-band light source switching mechanism provided by the present invention.

[0059] More specifically, a buckle groove 242 is provided on the first slope 211 and / or the second slope 231, and the buckle groove 242 is communicated with the groove 241. When the first optical component 22 needs to be replaced, the staff can use a tool to reach into the buckle groove 242 to move, pry or clamp the first optical component 22, so as to facilitate the disassembly of the first optical component 22, and avoid the problem of the first optical component 22 being worn and dropped due to careless disassembly or unstable handling when disassembling directly by hand, thereby avoiding damage to the first optical component 22.

[0060] More specifically, the buckle groove 242 is disposed at the bottom of the groove 241 and is symmetrically disposed about the central axis of the groove 241. At least two taking positions are provided for taking the first optical element 22, so as to facilitate taking out and placing the first optical element 22.

[0061] Furthermore, a placement space is formed between the first slope surface 211 and the second slope surface 231 , and the first optical component 22 is disposed in the placement space.

[0062] Further, a groove 241 is provided on the first slope 211 and / or the second slope 231, and the first optical element 22 is provided in the groove 241; a placement space is formed between the first slope 211 and the second slope 231, and the first optical element 22 is provided in the placement space. It is understandable that the light-emitting component 2 may include a plurality of first optical elements 22, wherein one first optical element 22 may be placed in the groove 241, and wherein one first optical element 22 may be placed in the placement space. The staff may reasonably configure the first optical elements 22 according to actual needs such as the quantity, specifications, and operation requirements.

[0063] Further, the multi-band light source switching mechanism includes a second optical element 9, and the second optical element 9 is arranged in the first optical cavity. It can be understood that the second optical element 9 can be a filter, and the filter can allow blue light with a wavelength between 450nm-490nm to pass through. The filter is arranged in the first optical cavity, and the light emitted by the laser generating part is filtered by the filter, and the blue light with a wavelength between 450nm-490nm is emitted to the first optical element. The first optical element can be a dichroic mirror, and the dichroic mirror reflects the blue light with a wavelength between 450nm-490nm to the object to be measured.

[0064] Furthermore, the multi-band light source switching mechanism comprises a second optical element 9, and the second optical element 9 is arranged in the second optical cavity. It can be understood that the second optical element 9 can be a filter.

[0065] Furthermore, the multi-band light source switching mechanism includes a second optical element 9, which is arranged in the first optical cavity and the second optical cavity. A second optical element 9 is arranged in both the first optical cavity and the second optical cavity, and the second optical element 9 can be a filter, which can allow blue light with a wavelength between 450nm-490nm to pass through. The filter is arranged in the first optical cavity. After the light emitted by the laser generating part is filtered by the filter, the blue light with a wavelength between 450nm-490nm is emitted to the first optical element. The first optical element can be a dichroic mirror, which reflects the blue light with a wavelength between 450nm-490nm to the object to be measured. After the object to be measured is excited by the blue light with a wavelength between 450nm-490nm, light with a wavelength of 510-540nm is generated. The light with a wavelength of 510-540nm first passes through the dichroic mirror and then passes through the second optical element 9 in the second optical cavity. The second optical element may be a filter, which allows light with a wavelength between 510 nm and 540 nm to pass through. Finally, the light with a wavelength between 510 nm and 540 nm reaches the image acquisition mechanism 6 and is recognized.

[0066] Furthermore, the switching component 4 includes a connecting member 42 and a rotating seat 43, the connecting member 42 is arranged on the light-emitting component 2, the rotating seat 43 is movably arranged on the connecting member 42, and at least a portion of the rotating seat 43 is threadedly connected to the guide rod 41, and the rotating seat 43 can move along the length direction of the guide rod 41.

[0067] Understandable, see Figure 1-Figure 3 The rotating seat 43 is threadedly connected with the guide rod 41. When the rotating seat 43 and the guide rod 41 rotate relative to each other, the rotating seat 43 can move along the axial direction of the guide rod 41. The rotating seat 43 is movably arranged on the connecting member 42. The connecting seat is connected with the first connecting part 21 and / or the second connecting part 23. The first connecting part 21 and / or the second connecting part 23 can move synchronously with the connecting seat. The movement of the first connecting part 21 and / or the second connecting part 23 can be realized, so that the light output end moves toward the center hole to realize the cutting in of the light output end. The light output end moves away from the center hole to realize the cutting out of the light output end.

[0068] More specifically, the multi-band light source switching mechanism also includes a mounting base 5, which is detachably connected to the base 1. A driving unit is provided on the base 1, and the output end of the driving unit is connected to the guide rod. The driving unit can drive the guide rod to rotate in a specified direction.

[0069] It is understandable that the output end of the driving unit is connected to the guide rod, and the guide rod can be a cylinder. When the driving unit drives the guide rod to rotate, the guide rod can rotate with its own axis as the rotation center. The connecting seat is connected to the light-emitting component 2, and the light-emitting component 2 can be restricted to move along a specified straight line through the guide rail 3, the guide rod 41 or other means. The rotating seat 43 is movably arranged on the connecting seat, wherein the rotating seat 43 can be rotatably arranged on the connecting seat, and the rotation axis of the rotating seat 43 is parallel to the specified straight line mentioned in this embodiment. When the guide rod and the rotating seat 43 rotate relative to each other, the light-emitting component 2 can move along the specified straight line direction, thereby realizing the cutting in and out of the light-emitting end.

[0070] More specifically, it also includes a heat dissipation component, which includes a heat dissipation block. The heat dissipation block is connected to the laser generating part. The heat dissipation block has fins, which can increase the contact area with the air and enhance the heat dissipation effect of the light source.

[0071] More specifically, the heat dissipation assembly also includes a fan, which is arranged on the mounting base 5, and the heat absorption direction of the fan is arranged toward the heat dissipation block. The fan can quickly discharge the heat dissipated by the heat dissipation block to the other side of the fan, thereby improving the heat dissipation efficiency of the heat dissipation block.

[0072] Example 3

[0073] Another aspect of the present invention further provides a light source switching method, which is implemented by using the multi-band light source switching mechanism, and the method of use includes:

[0074] The light emitting end of one of the light emitting components 2 is controlled to cut into the central hole 11, and the light beam is reflected by the first optical component 8 and then emitted to the object 7 to be measured along the first direction, and the light reflected by the object 7 is transmitted by the first optical component 8 and then emitted along the second direction;

[0075] The light emitting end of the previous light emitting component 2 is controlled to cut out the central hole 11 , and the light emitting end of the light emitting component 2 of another wavelength is controlled to cut into the central hole 11 .

[0076] It should be understood that the above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-band light source switching mechanism, characterized in that: include: A base (1), a plurality of light-emitting components (2) capable of providing light sources of different wavelengths, and a first optical component (8); a center hole (11) is provided at a selected position of the base (1); the light-emitting component (2) is provided on the base (1) and is capable of moving along a selected trajectory on the base (1); and the selected position is simultaneously located on the moving trajectory of the plurality of light-emitting components (2); the first optical component (8) is provided on the light-emitting path of the light-emitting component (2) and is used to reflect and transmit a specified light beam; and the light-emitting ends of the two light-emitting components (2) can cut out the center hole (11) under the driving force of an external force, or cut into the center hole (11) so that the reflected and transmitted light are emitted in a first direction and a second direction respectively.

2. A multi-band light source switching mechanism according to claim 1, characterized in that: It comprises a plurality of light-emitting components (2), wherein the plurality of light-emitting components (2) are arranged in sequence along the circumferential direction of the base (1).

3. The multi-band light source switching mechanism according to claim 1, characterized in that: The light-emitting component (2) can enable the light-emitting end to cut into or out of the central hole (11) through a switching component (4); the switching component (4) comprises a guide rod (41); the light-emitting component (2) is movably arranged on the guide rod (41) and can move along the axial direction of the guide rod (41).

4. The multi-band light source switching mechanism according to claim 3, characterized in that: The switching assembly (4) comprises a connecting member (42) and a rotating seat (43), wherein the connecting member (42) is arranged on the light-emitting assembly (2), the rotating seat (43) is movably arranged on the connecting member (42), and at least a part of the rotating seat (43) is threadedly connected to the guide rod (41), and the rotating seat (43) can move along the length direction of the guide rod (41); And / or, the light-emitting component (2) comprises the first connecting part (21), the second connecting part (23) and the laser generating part, the first connecting part (21) has a first light outlet and a first optical cavity which are interconnected, the second connecting part (23) has a second light outlet and a second optical cavity which are interconnected, the laser generating part is arranged in the first optical cavity, the first optical element (8) is arranged between the first optical cavity and the second optical cavity, one of the first light outlet and the second light outlet is at least used to make the reflected light emit in the first direction, and the other is used to make the transmitted light emit in the second direction.

5. The multi-band light source switching mechanism according to claim 4, characterized in that: The first connecting portion (21) is detachably connected to the second connecting portion (23).

6. The multi-band light source switching mechanism according to claim 5, characterized in that: The first connecting portion (21) has a first slope surface (211), and the second connecting portion (23) has a second slope surface (231). At least parts of the first slope surface (211) and the second slope surface (231) abut against each other to connect the first optical cavity with the second optical cavity.

7. The multi-band light source switching mechanism according to claim 6, characterized in that: A groove (241) is provided on the first slope surface (211) and / or the second slope surface (231), and the first optical element (8) is arranged in the groove (241); And / or, a placement space is formed between the first slope surface (211) and the second slope surface (231), and the first optical component (8) is arranged in the placement space.

8. The multi-band light source switching mechanism according to claim 7, characterized in that: The invention comprises a second optical element (9), wherein the second optical element (9) is arranged in the first optical cavity and / or in the second optical cavity.

9. A microscope device, comprising an illumination module, characterized in that: The lighting module comprises the multi-band light source switching mechanism according to any one of claims 1-8.

10. The method for using the multi-band light source switching mechanism according to any one of claims 1 to 8, characterized in that: include: The light emitting end of one of the light emitting components (2) is controlled to cut into the central hole (11), and the light beam is reflected by the first optical component (8) and then emitted along a first direction to the object to be measured (7), and the light reflected by the object to be measured (7) is transmitted by the first optical component (8) and then emitted along a second direction; The light-emitting end of the previous light-emitting component (2) is controlled to cut out the central hole (11), and the light-emitting end of the light-emitting component (2) of another wavelength is controlled to cut into the central hole (11).

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