Light path adjusting device and spectrum detector

Abstract

The embodiment of the invention provides a light path adjusting device and a spectrum detector, the light path adjusting device comprises a first adjusting piece, a connecting shaft, a second adjusting piece and an optical lens, the connecting shaft is arranged on the first adjusting piece and is used for connecting the first adjusting piece and a base station of the spectrum detector; the second adjusting piece comprises a first connecting end and a second connecting end which are connected with each other, and the first connecting end penetrates through the first adjusting piece; the optical lens is fixed on one side of the second connecting end along the first direction and is provided with a light emitting end surface; the intersection point of the central axis of the connecting shaft and the central axis of the first connecting end coincides with the center of the light emitting end face, the first adjusting piece and the second adjusting piece can rotate around the connecting shaft relative to the base table, and the second adjusting piece can rotate relative to the first adjusting piece through the first connecting end. According to the optical path adjusting device, the light position deviation caused by mechanical adjustment is effectively avoided, the adjustment of the optical piece lens is rapidly and accurately carried out, the actual optical path is made to accord with the designed optical path, and the optical path deviation is reduced.

Description

Technical Field

[0001] The present application relates to the field of optical instruments, and in particular to an optical path adjustment device and a spectrum detector. Background Art

[0002] Taking the application of spectral detectors in the biological and medical fields as an example, spectral detectors can be used as part of a particle analyzer to count and classify different particles. Because the fluorescence spectra produced by multiple lasers of different wavelengths exciting the same fluorescent dye overlap, they are collimated, split, and filtered to separate the fluorescence signals into different wavelengths. These are then received by a photodetector, which then uses computer software to analyze the fluorescence signals of each wavelength to determine the type and number of particles in the sample.

[0003] In a spectral detector, the positional accuracy of the optical lens significantly impacts the detection results. Therefore, the position of the optical lens must be adjusted before spectral analysis. Related technologies employ a planar displacement adjustment mechanism, which is unsuitable for complex optical systems. Furthermore, the adjustment process prevents the optical element from being adjusted around its light-emitting center, which can easily cause optical path deviation and affect optical path stability. Summary of the Invention

[0004] In view of this, embodiments of the present application aim to provide an optical path adjustment device and a spectrum detector to quickly and conveniently adjust the actual optical path to match the designed optical path.

[0005] To achieve the above objectives, the technical solution of the embodiment of the present application is implemented as follows:

[0006] The present invention provides an optical path adjustment device for a spectrum detector, comprising:

[0007] a first adjusting member;

[0008] a connecting shaft, provided on the first adjusting member, for connecting the first adjusting member and a base of the spectrum detector;

[0009] A second adjusting member includes a first connecting end and a second connecting end connected to each other, wherein the first connecting end is passed through the first adjusting member;

[0010] an optical lens fixed to one side of the second connecting end along the first direction, the optical lens having a light emitting end surface;

[0011] Among them, the intersection of the central axis of the connecting shaft and the central axis of the first connecting end coincides with the center of the light-emitting end surface, the first adjusting member and the second adjusting member can rotate relative to the base around the connecting shaft, and the second adjusting member can rotate relative to the first adjusting member through the first connecting end.

[0012] In some embodiments, the optical lens is a reflecting mirror, and the intersection of the central axis of the connecting shaft and the central axis of the first connecting end is the reflecting point of the optical lens.

[0013] In some embodiments, the connecting shaft extends along a top-bottom direction of the optical path adjusting device, and the central axis of the first connecting end extends along a second direction, and the first direction, the second direction and the top-bottom direction are perpendicular to each other.

[0014] In some embodiments, the optical path adjusting device comprises at least one connecting member penetrating through the first adjusting member and the first connecting end to connect the first adjusting member and the second adjusting member, and the connecting member is capable of switching the second adjusting member between a fixed state relative to the first adjusting member and a rotating state relative to the first adjusting member.

[0015] In some embodiments, the first adjusting member is provided with a through hole penetrating along a second direction, and the first connecting end is inserted into the through hole along the second direction.

[0016] The first adjusting member is provided with a first mounting hole in communication with the through hole, and the first connecting end is provided with a second mounting hole, and the connecting member penetrates through the first mounting hole and the second mounting hole to connect the first connecting end and the second adjusting member, and the first direction is perpendicular to the second direction.

[0017] In some embodiments, the connecting member is curvedly extended.

[0018] In some embodiments, part of the structure of the first adjusting member is formed as an arc-shaped structure surrounding the outer side of the first connecting end in the circumferential direction, the first mounting hole penetrates through the arc-shaped structure, and the number of the connecting members is two, and the two connecting members are arranged on opposite sides of the arc-shaped structure along the first direction.

[0019] In some embodiments, the second connecting end comprises a disc body and an extension, the disc body connects the first connecting end and the extension, and abuts against the first adjusting member, the extension extends outwardly from the connection with the disc body along the second direction, and the disc body and the extension jointly define a mounting area, and the optical lens is fixed in the mounting area.

[0020] In some embodiments, the disc body has a first abutting surface, the extension has a second abutting surface and a supporting surface, the first abutting surface is connected to one side of the second abutting surface along the first direction, and the supporting surface is connected to the bottom side of the second abutting surface, and the bottom end surface of the optical lens is supported on the supporting surface and abuts against the second abutting surface through the first abutting surface.

[0021] In some embodiments, the disc body is formed with a notch beyond at least a partial area of the optical lens in the first direction to avoid the light rays emitted through the optical lens.

[0022] In some embodiments, the optical path adjusting device comprises at least one fastener for connecting the first adjusting member and the base, and enabling the first adjusting member to switch between a state of being fixed relative to the base and a state of rotating relative to the base.

[0023] In some embodiments, the connecting shaft is in an integral structure with the first adjusting member, or the connecting shaft is a pin shaft.

[0024] In some embodiments, the second adjusting member is in an integral structure.

[0025] The embodiments of the present application also provide a spectrum detector for a particle analyzer, comprising:

[0026] a base;

[0027] a collimating positioning member arranged on the base;

[0028] and the optical path adjusting device as described in any of the embodiments of the present application, the first adjusting member is connected with the base through the connecting shaft, and the first adjusting member and the second adjusting member can adjust the optical lens according to the position of the light rays emitted from the optical lens on the collimating positioning member.

[0029] The optical path adjusting device provided by the embodiments of the present application, the second adjusting member bears the optical lens through the second connecting end, adjusts the position of the optical lens through the first connecting end, and the structures of the first adjusting member and the second adjusting member are relatively simple, reducing the adjusting cost. Meanwhile, the intersection of the central axis of the connecting shaft and the central axis of the first connecting end coincides with the center of the light emitting end surface of the optical lens, the optical lens always rotates around the center of the light emitting end surface, effectively avoiding the light position deviation caused by mechanical adjustment, quickly and accurately adjusting the optical lens, making the actual optical path consistent with the designed optical path, and reducing the optical path deviation. Moreover, the second adjusting member can independently complete the rotation relative to the first adjusting member, the structure is simpler, and the demand for external supporting structure is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 FIG. 1 is a structural schematic diagram of an optical path adjusting device according to an embodiment of the present application, wherein the illustrated optical lens is a collimating lens;

[0031] Figure 2 FIG. 2 is a structural schematic diagram of another view of the structure shown in FIG. 1; Figure 1 FIG. 3 is a structural schematic diagram of another view of the structure shown in FIG. 2.

[0032] Figure 3 for Figure 1 A schematic diagram of the structure shown in FIG. 1 from another perspective;

[0033] Figure 4 for Figure 1 The structural schematic diagram of the second adjusting member is shown.

[0034] Description of Reference Numerals

[0035] 20-optical path adjustment device;

[0036] 21-first adjusting member; 21a-first mounting hole; 211-arc-shaped structure; 22-second adjusting member; 22a-operating hole; 221-first connecting end; 221a-second mounting hole; 222-second connecting end; 2221-disk body; 2222-extension portion; 222a-first abutting surface; 222b-second abutting surface; 222c-supporting surface; 222d-notch; 23-optical lens; 23a-light-emitting end surface; 24-connecting shaft; 25-connecting member. DETAILED DESCRIPTION

[0037] In the description of the embodiments of the present application, it should be noted that the terms "height direction", "up", "down", "top", "bottom", "left", "right", "front", "back", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the embodiments of the present application.

[0038] Furthermore, it should be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0039] An embodiment of the present application provides an optical path adjustment device 20 for use with a spectrum detector.

[0040] A spectroscopic detector is a device used to analyze the optical properties of a substance, such as absorption, emission, and scattering. It determines the composition and structure of a sample by measuring the intensity of light at different wavelengths. Spectroscopic detectors are used in fields such as biology and medicine.

[0041] The embodiment of the present application further provides a spectrum detector, comprising a base, a collimating positioning member, and the optical path adjustment device 20 of any embodiment of the present application.

[0042] The embodiments of the present application are described by taking the application of a spectral detector to a particle analyzer as an example.

[0043] Particle analyzers can use a variety of technologies to measure the size, shape, concentration and other physical and chemical properties of particles.

[0044] Taking the particle analyzer using flow cytometry as an example, after the cells are labeled with fluorescent markers, multiple lasers of different wavelengths excite the same specific fluorescent dye, and the fluorescence spectra generated by the excitation will overlap. After collimation, spectroscopy, and filtering by the spectral detector, the fluorescence signals are separated into different wavelengths and converted into electrical signals. The fluorescence signals of different wavelengths are analyzed one by one by computer software to count the types and quantities of particles in the sample.

[0045] Exemplarily, the spectral detector also includes a dichroic mirror assembly, a side-scattering optical assembly and a photoelectric conversion module. After the laser excites the sample to be tested, the generated light is transmitted to the spectral detector through the optical fiber. After the light is collimated, it is transmitted to the dichroic mirror assembly. The dichroic mirror assembly includes two groups of dichroic mirrors. One group of dichroic mirrors receives the collimated light, transmits the fluorescence signal in the light to the other group of dichroic mirrors, and transmits the side-scattered light signal in the light to the side-scattering optical assembly. The other group of dichroic mirrors transmits the fluorescence signal to multiple photoelectric conversion modules after reflection and spectroscopy. The photoelectric conversion module filters the fluorescence signal and converts it into an electrical signal to count the type and quantity of particles in the sample, and the side-scattering optical assembly converts the scattered light signal into an electrical signal to reflect the shape and size of the particles.

[0046] It is understood that when light is collimated and flows into the collimated optical path of the dichroic mirror assembly, and when light flows through the dichroic mirror assembly to the photoelectric conversion module, the positional accuracy of the optical lenses used in the collimated and reflected optical paths must be high. This ensures that the entire test optical path follows the designed optical path, thereby ensuring the detection accuracy of the fluorescence signal flowing to the photoelectric conversion module. Any deviation from the collimated or reflected optical path will significantly affect the detection accuracy of the photoelectric conversion module. Therefore, when performing spectral detection, the position of the optical lenses needs to be adjusted to ensure that the actual optical path matches the designed optical path.

[0047] The optical path adjustment device 20 is used to carry the optical lens 23 and adjust the position of the optical lens 23 in the spectrum detector.

[0048] See also Figures 1 to 4 The optical path adjustment device 20 includes a first adjustment member 21, a connecting shaft 24, a second adjustment member 22 and an optical lens 23.

[0049] The connecting shaft 24 is provided on the first adjusting member 21 and is used to connect the first adjusting member 21 and the base of the spectrum detector.

[0050] The first adjustment member 21 can be positioned and connected to the base of the spectrum detector through the connecting shaft 24. The base is used as a detection platform to provide an installation position for the optical path adjustment device 20, the dichroic mirror assembly, the side diffusion optical assembly, the photoelectric conversion module, etc.

[0051] The second adjusting member 22 includes a first connecting end 221 and a second connecting end 222 connected to each other. The first connecting end 221 passes through the first adjusting member 21 .

[0052] The optical lens 23 is fixed to one side of the second connection end 222 along the first direction, and the optical lens 23 has a light emitting end surface 23 a.

[0053] That is, the second adjusting member 22 is positioned and connected to the first adjusting member 21 via the first connecting end 221, and the second adjusting member 22 supports the optical lens 23. In the actual assembly process, the optical lens 23 can be first matched with the second connecting end 222, and then the first adjusting member 21 and the second adjusting member 22 can be connected via the first connecting end 221. Finally, the optical path adjustment device 20 can be matched with the base via the connecting shaft 24.

[0054] It can be understood that the first connection end 221 and the second connection end 222 are relatively fixed, that is, no relative movement occurs.

[0055] The optical lens 23 is fixed to the second connecting end 222, meaning that the optical lens 23 and the second connecting end 222 are relatively fixed and do not move relative to each other. For example, the optical lens 23 can be fixed to the second connecting end 222 by bonding. The light-emitting end surface 23a refers to the surface of the optical lens 23 from which light is emitted. The light-emitting end surface 23a determines the direction of light transmission, collimation, and alignment with other optical components.

[0056] It can be understood that the light emitting end surface 23 a can be exposed to the second connection end 222 along the first direction, that is, the second connection end 222 will not block the light emitting end surface 23 a.

[0057] The optical lens 23 can be a spherical lens, an aspherical lens, a cylindrical lens, a flat lens, etc., which are not limited here. The light-emitting end surface 23a can be concave, convex or flat, which are not limited here.

[0058] The first direction may be any direction. For example, the first direction is perpendicular to the light emitting end surface 23 a.

[0059] Among them, the intersection of the central axis B1 of the connecting shaft 24 and the central axis B2 of the first connecting end 221 coincides with the center O of the light-emitting end surface 23a, the first adjusting member 21 and the second adjusting member 22 can rotate relative to the base around the connecting shaft 24, and the second adjusting member 22 can rotate relative to the first adjusting member 21 through the first connecting end 221.

[0060] The collimating positioning member is set on the base, and the first adjusting member 21 is connected to the base through the first connecting shaft 24. The first adjusting member 21 and the second adjusting member 22 can adjust the optical lens 23 according to the position of the light emitted from the optical lens 23 on the collimating positioning member.

[0061] The central axis of the connecting shaft 24 refers to the geometric centerline of the connecting shaft 24, which extends along the length of the connecting shaft 24 and passes through the geometric center of the cross section of the connecting shaft 24. For example, the connecting shaft 24 is cylindrical, and the central axis of the connecting shaft 24 is the line connecting the centers of the cross sections.

[0062] The central axis of the first connection end 221 is the geometric center line of the first connection end 221 . When the first connection end 221 is substantially cylindrical, the central axis of the first connection end 221 is the line connecting the centers of the cross sections.

[0063] The center of the light emitting end surface 23a refers to the geometric center of the light emitting end surface 23a. If the light emitting end surface 23a is circular, the center of the light emitting end surface 23a is the center of the circle. If the light emitting end surface 23a is rectangular or other polygonal, the center of the light emitting end surface 23a is the intersection of the lines connecting the midpoints of the opposite sides.

[0064] It can be understood that the center of the light-emitting end surface 23a is the ideal passing point of the light. When the optical lens 23 is a reflector, the light is reflected out through this center. Therefore, when the intersection of the central axis of the connecting shaft 24 and the central axis of the first connecting end 221 coincides with the center of the light-emitting end surface 23a, the position of the optical lens 23 can be adjusted with the connecting shaft 24 and the first connecting end 221 as the rotation center respectively.

[0065] A collimator is a structure used to detect or indicate whether the light path is in the ideal path. The collimator can be a crosshair target with a scale, etc.

[0066] Exemplarily, the collimation positioning member is set on the base, and the collimation positioning member is located on the designed optical path. The collimation positioning member is provided with concentric rings of different diameters. When the light emitted from the light-emitting end face 23a is projected onto the annular surface, a light spot is formed on the annular surface. The size of the ring corresponds to the calibration range of the light spot, thereby judging whether the installation position of the optical lens 23 is qualified. If it is unqualified, the offset of the light spot is observed through the annular surface, and the position of the optical lens 23 is adjusted by the first adjustment member 21 and the second adjustment member 22 to make the actual optical path consistent with the designed optical path.

[0067] In this embodiment, the intersection of the central axis of the connecting shaft 24 and the central axis of the first connecting end 221 coincides with the center of the light-emitting end surface 23a, that is, no matter how the first adjusting member 21 or the second adjusting member 22 rotates, the position of the light emitting point relative to the optical lens 23 itself will not change. When adjusting the angle of the optical lens 23, all adjustments are performed around the center point of the light-emitting end surface 23a, which can avoid complex multi-point calibration requirements and reduce optical path deviation caused by cumulative errors.

[0068] The first adjusting member 21 and the second adjusting member 22 are capable of rotating relative to the base around the connecting shaft 24, which means that the first adjusting member 21 and the second adjusting member 22 do not move relative to each other at this time, and the first adjusting member 21 and the second adjusting member 22 rotate relative to the base simultaneously through the connecting shaft 24. When the first adjusting member 21 and the second adjusting member 22 are rotated relative to the base through the connecting shaft 24, since the central axis of the connecting shaft 24 is the rotation axis, that is, the center of the light-emitting end face 23a is located on the rotation axis, the angle of the optical lens 23 can be changed during rotation, but the position of the center of the light-emitting end face 23a relative to the connecting shaft 24 does not change. Therefore, the light still emerges from the center of the light-emitting end face 23a, and no new uncertainties such as the overall offset of the light position are introduced during the adjustment process through the connecting shaft 24.

[0069] The second adjusting member 22 can rotate relative to the first adjusting member 21 via the first connecting end 221, which means that the second adjusting member 22 can directly rotate relative to the first adjusting member 21 without the need for an additional rotating shaft structure. In this case, there is no relative motion between the first adjusting member 21 and the base. In this case, the central axis of the first connecting end 221 is the rotation axis, and the center of the light-emitting end surface 23a is located on this rotation axis. During rotation, the angle of the optical lens 23 can be changed, but the position of the center of the light-emitting end surface 23a relative to the second adjusting member 22 does not change. Therefore, the light still emerges from the center of the light-emitting end surface 23a. During the rotation of the second adjusting member 22, no new uncertainties such as the overall offset of the light position are introduced.

[0070] For example, the rotation of the first adjusting member 21 and the second adjusting member 22 around the connecting shaft 24 can adjust the lateral offset of the light spot on the annular surface to return it to the ideal position; the rotation of the second adjusting member 22 can adjust the vertical offset of the light spot on the annular surface to return it to the ideal position.

[0071] In the optical path adjustment device 20 provided in the embodiment of the present application, the second adjustment member 22 carries the optical lens 23 through the second connection end 222, and the position of the optical lens 23 is adjusted by the first connection end 221 through the cooperation between the first connection end 221 and the first adjustment member 21. The structures of the first adjustment member 21 and the second adjustment member 22 can be relatively simple, reducing the adjustment cost. At the same time, the intersection of the central axis of the connecting shaft 24 and the central axis of the first connection end 221 coincides with the center of the light-emitting end face 23a of the optical lens 23. The optical lens 23 always rotates around the center of its own light-emitting end face 23a, effectively avoiding the position deviation of the light caused by mechanical adjustment, quickly and accurately adjusting the optical lens, making the actual light path consistent with the designed light path, and reducing light path deviation. In addition, the second adjustment member 22 can independently complete the rotation relative to the first adjustment member 21, which is simpler in structure and reduces the need for external support structure.

[0072] In some embodiments, the optical lens 23 is a reflector, and the intersection of the central axis of the connecting shaft 24 and the central axis of the first connecting end 221 is the reflection point of the optical lens 23 .

[0073] A reflector is used to reflect light to redirect the light path. The reflector can be a plane mirror, a reflecting prism, etc.

[0074] In this embodiment, the center of the light-emitting end surface 23a of the optical lens 23 is the reflection point. Therefore, when the first adjusting member 21 drives the second adjusting member 22 to rotate, or when only the second adjusting member 22 rotates, the reflection point of the optical lens 23 is always located on the rotation axis, and the actual light path can be quickly and accurately made consistent with the designed light path.

[0075] For some examples, see Figures 1 to 3 The connecting shaft 24 extends along the top-bottom direction of the optical path adjusting device 20 , and the central axis of the first connecting end 221 extends along the second direction. The first direction, the second direction, and the top-bottom direction are perpendicular to each other.

[0076] Exemplarily, the connecting shaft 24 is cylindrical.

[0077] In this embodiment, the central axis of the connecting shaft 24 is parallel to the top and bottom directions, and the central axis of the first connecting end 221 is parallel to the second direction. When the first adjusting member 21 and the second adjusting member 22 rotate around the connecting shaft 24, rotation adjustment along the horizontal direction can be achieved. When the second adjusting member 22 rotates around itself, rotation adjustment along the top and bottom directions can be achieved. In this way, the two do not interfere with each other, and can quickly and accurately achieve all-round adjustment of the optical lens 23 to put it in the correct position without causing unnecessary deviations.

[0078] It should be noted that the top and bottom directions of the optical path adjustment device 20 are consistent with the top and bottom directions of the spectrum detector.

[0079] It is understood that the first adjusting member 21 is engaged with the base via the connecting shaft 24. The first adjusting member 21 and the base abut against each other along the top-bottom direction. When the first adjusting member 21 and the second adjusting member 22 rotate relative to the base about the connecting shaft 24, the first adjusting member 21 and the base remain in contact, and the first and second adjusting members 21, 22 do not deviate in the top-bottom direction, thereby improving adjustment accuracy. When the second adjusting member 22 rotates relative to the first adjusting member 21, the first adjusting member 21 and the base remain relatively fixed, and the second adjusting member 22 does not deviate in the horizontal direction.

[0080] It is understandable that, during the process of the first adjusting member 21 rotating around the connecting shaft 24 , the connecting shaft 24 may rotate or may not rotate, and this is not limited here.

[0081] For some examples, see Figures 1 to 3 The optical path adjustment device 20 includes at least one connecting member 25, which is passed through the first adjustment member 21 and the first connecting end 221 to connect the first adjustment member 21 and the second adjustment member 22, and the connecting member 25 can enable the second adjustment member 22 to switch between a fixed state relative to the first adjustment member 21 and a rotating state relative to the first adjustment member 21.

[0082] For example, when the first and second adjusting members 21, 22 need to move relative to the base, the connector 25 applies a clamping force to the first and second adjusting members 21, 22, securing the second adjusting member 22 relative to the first adjusting member 21. The second adjusting member 22 does not rotate relative to the first adjusting member 21 via the first connecting end 221. Thus, movement deviation is prevented, maintaining adjustment stability. When the second adjusting member 22 needs to move relative to the first adjusting member 21, the connector 25 releases the second adjusting member 22, allowing it to rotate relative to the first adjusting member 21. After adjustment is complete, the first and second adjusting members 21, 22, are locked again.

[0083] In this embodiment, by providing a connector 25 with switchable states, the adjustment accuracy and stability can be improved, the optical path drift caused by external vibration can be reduced, a controllable pipeline for adjustment freedom can be realized, and the reliability and accuracy of optical path adjustment can be improved.

[0084] For some examples, see Figures 1 to 4 The first adjusting member 21 is provided with a through hole extending along the second direction, and the first connecting end 221 is inserted into the through hole along the second direction. In other words, the first connecting end 221 is inserted into the through hole and can rotate relative to the first adjusting member 21. The cross-sections of the first connecting end 221 and the through hole can both be circular.

[0085] The first adjusting member 21 is provided with a first mounting hole 21a, which is connected to the through hole. The first connecting end 221 is provided with a second mounting hole 221a. The connecting member 25 passes through the first mounting hole 21a and the second mounting hole 221a to connect the first connecting end 221 and the second adjusting member 22. In other words, the connecting member 25 connects the second adjusting member 22 to the first adjusting member 21 by connecting the first connecting end 221 and the first adjusting member 21.

[0086] When the second adjusting member 22 needs to be rotated relative to the first adjusting member 21, the connecting member 25 can loosen the clamping force between the first connecting end 221 and the second adjusting member 22, so that the first connecting end 221 can be rotated relative to the first adjusting member 21. At this time, the connecting member 25 can be retained in the second mounting hole 221a. After the adjustment is completed, the first connecting end 221 and the first adjusting member 21 can be locked. The adjustment is simple and quick.

[0087] The number of the first mounting holes 21 a and the second mounting holes 221 a is not limited. For example, there can be two of each.

[0088] For some examples, see Figure 1 The connecting member 25 is curved and extended. That is, the entire connecting member 25 is curved. In this way, the connecting member 25 can pass through the first mounting hole 21a and the second mounting hole 221a to connect the first adjusting member 21 and the second adjusting member 22. At the same time, the curved connecting member 25 allows and adapts to the rotation of the first connecting end 221. At the same time, when the connection relationship between the first connecting end 221 and the first adjusting member 21 is restored, the position of the first connecting end 221 relative to the first adjusting member 21 is not affected.

[0089] For some examples, see Figure 1 Part of the structure of the first adjusting member 21 is formed as an arc structure 211, the arc structure 211 surrounds the circumferential outside of the first connecting end 221, the first mounting hole 21a passes through the arc structure 211, and the number of connecting members 25 is two, and the two connecting members 25 are arranged on opposite sides of the arc structure 211 along the first direction.

[0090] In this embodiment, the setting of the arc structure 211 can be adapted to the first connecting end 221, and the connecting member 25 passes through the first connecting end 221 and the first adjusting member 21 from different directions to increase the adjustment stability and reduce the optical path deviation caused by external vibration. At the same time, it is also convenient for the connecting member 25 to adapt to the small rotation of the first connecting end 221, thereby increasing the adjustment reliability.

[0091] The specific structure of the connecting member 25 is not limited. In some embodiments, the connecting member 25 is a set screw. This allows the user to easily lock or release the first and second adjusting members 21, 22 using a hand tool. To release, the user simply loosens the set screw, preventing the second adjusting member 22 from shaking relative to the first adjusting member 21, thereby increasing adjustment reliability. Furthermore, the set screw has a simple structure and is easily replaceable without requiring complex processing.

[0092] Of course, in some other embodiments, the connecting member 25 may also be a combination of a bolt and a nut.

[0093] The number of the connecting members 25 is not limited and can be one or more. For example, the number of the connecting members 25 is two.

[0094] For some examples, see Figure 4 The second connection end 222 includes a disk body 2221 and an extension portion 2222. The disk body 2221 connects the first connection end 221 and the extension portion 2222, and abuts against the first adjusting member 21. The extension portion 2222 protrudes and extends in the second direction from the connection with the disk body 2221. The disk body 2221 and the extension portion 2222 jointly define an installation area, and the optical lens 23 is fixed in the installation area.

[0095] Exemplarily, the disk body 2221 is roughly a flat cylindrical structure, the cross-sectional area of ​​the disk body 2221 along the top and bottom directions is larger than the cross-sectional area of ​​the first connection end 221, the first connection end 221 is connected to the second connection end 222 along the second direction, and the optical lens 23 is connected to the second connection end 222 along the first direction.

[0096] That is to say, the optical lens 23 cooperates with the surface of the disc 2221 facing away from the first connecting end 221 .

[0097] In this embodiment, the disk body 2221 abuts against the first adjusting member 21, which can realize the positioning of the first adjusting member 21 when it cooperates with the first connecting end 221, so as to facilitate accurate docking. At the same time, the disk body 2221 and the extension portion 2222 jointly define an installation area, and the optical lens 23 is fixed to the installation area. The optical lens 23 can also be positioned and installed to increase the installation reliability. The light-emitting end surface 23a of the optical lens 23 can be exposed to the extension portion 2222 along the first direction. In this way, it is also convenient to directly realize that the center of the light-emitting end surface 23a falls on the central axis of the first connecting end 221, without the need to set up an additional rotating shaft structure, and the structure of the optical path adjustment device 20 is simpler.

[0098] For some examples, see Figure 4 The disc body 2221 has a first abutting surface 222a, the extension portion 2222 has a second abutting surface 222b and a supporting surface 222c, the first abutting surface 222a is connected to one side of the second abutting surface 222b along the first direction, the supporting surface 222c is connected to the bottom side of the second abutting surface 222b, the bottom end surface of the optical lens 23 is supported on the supporting surface 222c, and abuts against the second abutting surface 222b through the first abutting surface 222a.

[0099] The supporting surface 222c can bear the bottom of the optical lens 23 and provide support. The first abutting surface 222a and the second abutting surface 222b can be used as positioning references. During assembly, the optical lens 23 is supported on the supporting surface 222c and is in contact with the first abutting surface 222a along the second direction and is in contact with the second abutting surface 222b along the first direction. Thus, three-sided positioning is achieved, and the position of the optical lens 23 is locked, so that the position of the optical lens 23 on the second adjustment member 22 is fixed, thereby improving the assembly accuracy of the optical lens 23.

[0100] The optical lens 23 can be bonded to the second abutting surface 222b by bonding.

[0101] For some examples, see Figure 1 and Figure 4 Along the first direction, the disc 2221 extends beyond at least a portion of the optical lens 23 to form a gap 222d to avoid light emitted from the optical lens 23.

[0102] In this embodiment, the provision of the notch 222d does not block the light, and facilitates the light to be emitted to the next position through the light-emitting end surface 23a, thereby increasing the light-emitting reliability.

[0103] In some embodiments, the optical path adjustment device 20 includes at least one fastener, which is used to connect the first adjustment member 21 and the base, and enables the first adjustment member 21 to switch between a fixed state relative to the base and a rotational state relative to the base.

[0104] In this embodiment, when it is necessary to move the first adjusting member 21 and the second adjusting member 22 relative to the base, the fastener releases the rotational freedom of the first adjusting member 21, so that the first adjusting member 21 can drive the second adjusting member 22 to rotate around the connecting shaft 24. After the adjustment is completed, the fastener locks the first adjusting member 21 and the base. When it is necessary to rotate the second adjusting member 22 relative to the first adjusting member 21, the fastener locks the first adjusting member 21 relative to the base, so that only the second adjusting member 22 drives the optical lens 23 to move, which can improve the adjustment accuracy and stability, reduce the optical path drift caused by external vibration, realize controllable management of the adjustment freedom, and improve the reliability and accuracy of the optical path adjustment.

[0105] The specific structure of the fastener is not limited, and it can be a fastening screw or a combination of a bolt and a nut, which is not limited here. The number of fasteners is not limited, and can be one or more. For example, the number of fasteners is two.

[0106] It is understood that in some embodiments, please refer to Figure 2 The second adjusting member 22 and the first adjusting member 21 are spaced apart in the top and bottom directions of the optical path adjustment module. In this way, space is provided for the second adjusting member 22 to rotate relative to the first adjusting member 21 to avoid interference and affect the adjustment accuracy. Of course, it is also convenient for the fasteners to be passed through the first adjusting member 21 and the base.

[0107] In some embodiments, the connecting shaft 24 and the first adjusting member 21 are integrated into one structure, thereby reducing assembly complexity and improving assembly efficiency.

[0108] In other embodiments, the connecting shaft 24 is a pin.

[0109] That is, in this embodiment, the connecting shaft 24 functions as an independent pin that is inserted into the hole to achieve the fit between the first adjusting member 21 and the base. The first adjusting member 21 and the pin are formed separately, and the pin can adapt to different first adjusting members 21 without having to replace the entire assembly, thus improving adaptability and reducing maintenance costs. Furthermore, the structural complexity of the first adjusting member 21 can be reduced, manufacturing precision can be increased, and errors can be reduced.

[0110] In some embodiments, the second adjusting member 22 is an integrated structure. That is, the first connecting end 221 and the second connecting end 222 are integrally formed. This can reduce assembly steps and improve manufacturing precision. On the other hand, it also facilitates the first connecting end 221 to fit the center of the light-emitting end surface 23a of the optical lens 23.

[0111] For some examples, see Figure 1 and Figure 4The second adjusting member 22 is provided with at least one operating hole 22a, which penetrates the second adjusting member 22 along the top-bottom direction. The operating hole 22a is used to accommodate an operating tool for driving the second adjusting member 22 to rotate.

[0112] In this embodiment, the setting of the operating hole 22a allows the user to insert an operating tool to achieve precise angle adjustment, reducing errors or damage to the precision mechanism caused by direct hand twisting. At the same time, the operating tool can also provide more stable torque input, reduce angle deviation caused by uneven force application, and increase operating comfort and reliability.

[0113] It is understood that the optical path adjustment device 20 of the embodiment of the present application can be used at least for adjusting the optical path of a reflective optical path. The optical path adjustment device 20 can be disposed downstream of the dichroic mirror assembly along the optical path direction to reflect light.

[0114] In the description of this application, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In this application, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine different embodiments or examples described in this application and features of different embodiments or examples without contradiction.

[0115] The foregoing description is merely a preferred embodiment of the present application and is not intended to limit the present application. Persons skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. An optical path adjustment device for a spectrum detector, characterized in that: include: a first adjusting member; a connecting shaft, provided on the first adjusting member, for connecting the first adjusting member and a base of the spectrum detector; A second adjusting member includes a first connecting end and a second connecting end connected to each other, wherein the first connecting end is passed through the first adjusting member; an optical lens fixed to one side of the second connecting end along the first direction, the optical lens having a light emitting end surface; Among them, the intersection of the central axis of the connecting shaft and the central axis of the first connecting end coincides with the center of the light-emitting end surface, the first adjusting member and the second adjusting member can rotate relative to the base around the connecting shaft, and the second adjusting member can rotate relative to the first adjusting member through the first connecting end.

2. The optical path adjustment device according to claim 1, characterized in that: The optical lens is a reflector, and the intersection of the central axis of the connecting shaft and the central axis of the first connecting end is the reflection point of the optical lens; And / or, the connecting axis extends along the top and bottom directions of the optical path adjusting device, the central axis of the first connecting end extends along the second direction, and the first direction, the second direction, and the top and bottom directions are perpendicular to each other.

3. The optical path adjustment device according to claim 1, wherein: The optical path adjustment device includes at least one connecting member, which is passed through the first adjusting member and the first connecting end to connect the first adjusting member and the second adjusting member, and the connecting member can switch the second adjusting member between a fixed state relative to the first adjusting member and a rotating state relative to the first adjusting member.

4. The optical path adjustment device according to claim 3, characterized in that: The first adjusting member is provided with a through hole penetrating along the second direction, and the first connecting end is inserted into the through hole along the second direction; The first adjusting member is provided with a first mounting hole, the first mounting hole is communicated with the through hole, the first connecting end is provided with a second mounting hole, the connecting member passes through the first mounting hole and the second mounting hole to connect the first connecting end and the second adjusting member, and the first direction is perpendicular to the second direction.

5. The optical path adjustment device according to claim 4, characterized in that: The connecting piece is bent and extended; And / or, part of the structure of the first adjusting member is formed as an arc structure, the arc structure surrounds the circumferential outer side of the first connecting end, the first mounting hole passes through the arc structure, the number of the connecting members is two, and the two connecting members are arranged on opposite sides of the arc structure along the first direction.

6. The optical path adjustment device according to claim 1, characterized in that: The second connecting end includes a disc body and an extension portion. The disc body connects the first connecting end and the extension portion and abuts against the first adjusting member. The extension portion protrudes and extends in a second direction from the connection with the disc body. The disc body and the extension portion jointly define an installation area, and the optical lens is fixed to the installation area.

7. The optical path adjustment device according to claim 6, characterized in that: The disc body has a first abutting surface, the extension portion has a second abutting surface and a supporting surface, the first abutting surface is connected to one side of the second abutting surface along the first direction, the supporting surface is connected to the bottom side of the second abutting surface, the bottom end surface of the optical lens is supported on the supporting surface and abuts against the second abutting surface via the first abutting surface.

8. The optical path adjustment device according to claim 6, characterized in that: Along the first direction, a gap is formed in at least a portion of the area of ​​the disk that exceeds the optical lens to avoid light emitted from the optical lens.

9. The optical path adjustment device according to any one of claims 1 to 8, characterized in that: The optical path adjustment device includes at least one fastener, which is used to connect the first adjustment member and the base, and enables the first adjustment member to switch between a fixed state relative to the base and a rotational state relative to the base.

10. The optical path adjustment device according to any one of claims 1 to 8, characterized in that: The connecting shaft and the first adjusting member are an integrated structure, or the connecting shaft is a pin shaft; And / or, the second adjusting member is an integrated structure.

11. A spectrum detector for a particle analyzer, characterized in that: include: abutment; an alignment positioning member, the alignment positioning member being arranged on the base; And the optical path adjustment device according to any one of claims 1 to 10, wherein the first adjustment member is connected to the base through the connecting shaft, and the first adjustment member and the second adjustment member can adjust the optical lens according to the position of the light emitted from the optical lens on the collimating positioning member.

Images