Optical filter fixing device for confocal microscopic Raman spectrometer

Abstract

The utility model provides an optical filter fixing device for a confocal microscopic Raman spectrometer, which relates to the technical field of confocal microscopic Raman spectrometers, and comprises a sample bearing table, a vertical guide structure is arranged above the sample bearing table, the lower end of the vertical guide structure is connected with the top of the sample bearing table in a rotatable connection mode, and the lower end of the vertical guide structure is connected with the top of the sample bearing table in a rotatable connection mode. An optical filter fixing structure is arranged on the outer surface of the vertical guide structure and can move up and down along the vertical guide structure. The rotatable vertical supporting rod is installed on the sample bearing table, and the sliding connecting piece is connected to the outer surface of the vertical supporting rod in a sleeving mode, so that the supporting frame installed on the outer surface of the sliding connecting piece can move up and down; the optical filter body is inserted from the optical filter installation groove in the side face of the supporting frame to be fixed, the height of the optical filter body is adjusted by moving the height of the sliding connecting piece up and down, installation is convenient, and the height is adjustable.

Description

Technical Field

[0001] The utility model relates to the technical field of confocal micro-Raman spectrometers, in particular to a filter fixing device for confocal micro-Raman spectrometers. Background Art

[0002] The confocal Raman microscope is a coupled research-grade microscope and a high-performance Raman spectrometer. It is used for research on material surfaces, interfaces, liquid crystals, minerals, biomedicine, and environmental protection. It can analyze solids, liquids, and gases, including organic and inorganic compounds, polymers, biofilms, and various materials (such as ceramics, diamonds, and nanomaterials). Applications include physics, chemistry, materials science, biology, pharmaceuticals, biochemistry, medicine, forensic science, criminal investigation, geology, and environmental science.

[0003] When a confocal Raman microscope is used to analyze the Raman spectrum of a solid powder, if the solid powder has strong fluorescence, the fluorescence will annihilate the Raman peak. To solve this problem, the following methods are commonly used:

[0004] Use SERS technology or use a small amount of sample for measurement, or dilute the sample into some other matrix, such as KBr;

[0005] The wavelength of the laser needs to be adjusted. If the wavelength of the laser cannot be adjusted, the laser intensity needs to be lowered and the laser irradiation time needs to be increased.

[0006] Try to find a solvent to dissolve the powder to see if it can quench the fluorescence background. Use anti-Stokes and Nortch filters.

[0007] Except for the use of filters, the above methods will cause contamination or damage to the tested samples, and the use of filters is also the simplest.

[0008] However, current confocal Raman microscopes do not have a dedicated device for installing filters, which makes it inconvenient to place the filters. If they are placed directly on the sample, the sample and the filter are too close and will be affected by the diffuse reflection of the filter. If the distance is too far, the intensity of the laser will be disturbed. Therefore, the distance of the filter also needs to be adjusted according to the different fluorescence intensities to find a balance.

[0009] To this end, the present application proposes a filter fixing device for a confocal Raman microscope to facilitate the assembly of the filter. Utility Model Content

[0010] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a filter fixing device for a confocal Raman microscope, which is used to solve the problems in the prior art of inconvenient filter placement and inconvenient filter height adjustment.

[0011] To achieve the above-mentioned and other related purposes, the present invention provides a filter fixing device for a confocal micro-Raman spectrometer, comprising a sample carrying platform;

[0012] A vertical guide structure is provided above the sample carrier, the lower end of the vertical guide structure is rotatably connected to the top of the sample carrier, and a filter fixing structure is provided on the outer surface of the vertical guide structure, and the filter fixing structure can move up and down along the vertical guide structure;

[0013] A filter body is detachably provided on the side surface of the filter fixing structure, and the filter body is horizontally arranged directly above the sample carrying platform.

[0014] Preferably, the number of the vertical guide structures is two, and the two vertical guide structures are symmetrically distributed left and right about the center line of the sample supporting platform, and the vertical guide structures are located at the left and right edges of the sample supporting platform;

[0015] The filter fixing structures provided on the outer surfaces of the two vertical guiding structures are distributed in a mirror image relationship with respect to the center line of the sample supporting platform.

[0016] Preferably, the vertical guiding structure includes a vertical support rod, the top of the vertical support rod is fixedly connected to the limiting member, and the bottom of the vertical support rod is provided with a damping shaft, and the damping shaft is inserted into the interior of the sample supporting platform.

[0017] Preferably, the outer surface of the vertical support rod is provided with a guide groove.

[0018] Preferably, the filter fixing structure includes a sliding connector, which is sleeved on the outer surface of the vertical support rod. A support frame is provided on the outer surface of the sliding connector, and a filter mounting groove is provided on the side of the support frame. The edge of the filter body is installed inside the filter mounting groove.

[0019] Preferably, the sliding connector includes a sliding sleeve, the inner wall surface of the sliding sleeve is provided with multiple anti-rotation strips, a rubber gasket is provided between two adjacent anti-rotation strips, the anti-rotation strips can be plugged into the guide groove, and the rubber gasket overlaps the outer surface of the vertical support rod.

[0020] Preferably, the mouth of the filter mounting slot is elastic, one end of the filter mounting slot passes through the support frame, the other end of the filter mounting slot is closed, and a flare is provided at one end of the filter mounting slot passing through the support frame.

[0021] Preferably, the damping shaft includes a connecting shaft, the connecting shaft is arranged at the lower part of the vertical support rod, and a limit plate is provided at the lower end of the connecting shaft;

[0022] The outer surface of the connecting shaft is covered with a connecting limiting sleeve, and an inverted "T"-shaped connecting hole is provided inside the connecting limiting sleeve. The limiting plate is limited by the inverted "T"-shaped connecting hole, and the connecting limiting sleeve is embedded in the interior of the sample supporting platform from the top of the sample supporting platform.

[0023] Preferably, the outer surface of the connecting shaft is provided with a spring bead, and the spring bead is elastic;

[0024] The inner wall of the connection limiting sleeve is provided with concave damping grooves, and the spring beads can be stuck between the damping grooves.

[0025] A confocal Raman microscope spectrometer comprises the above-mentioned filter fixing device.

[0026] As described above, the filter fixing device for a confocal Raman microscope of the present invention has the following beneficial effects:

[0027] The utility model installs a rotatable vertical support rod on the sample supporting platform and sleeves a sliding connector on the outer surface of the vertical support rod, so that the support frame installed on the outer surface of the sliding connector can achieve the effect of moving up and down. When the filter body needs to be fixed, the filter body is inserted into the filter mounting groove on the side of the support frame and fixed, and the height of the filter body is adjusted by moving the height of the sliding connector up and down, thereby achieving the effect of facilitating the installation of the filter body and being able to adjust the height of the filter body as needed.

[0028] The utility model provides a guide groove on the outer surface of the vertical support rod and an anti-rotation strip inside the sliding sleeve. The cooperation of the anti-rotation strip and the guide groove can prevent the sliding connection part from rotating on the outer surface of the vertical support rod. At the same time, a connecting shaft rod is provided at the bottom of the vertical support rod, and a retractable spring bead is provided on the outer surface of the connecting shaft rod. The spring bead cooperates with the damping groove on the inner wall of the connecting limiting sleeve sleeved on the outer surface of the connecting shaft rod, so that the vertical support rod can be rotated and limited, thereby improving the stability of the filter after installation.

[0029] Therefore, the utility model effectively overcomes various shortcomings in the prior art and has high industrial utilization value. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 Shown is a schematic structural diagram of the present utility model.

[0031] Figure 2 Display of the utility model Figure 1 A magnified schematic diagram of the structure in the middle.

[0032] Figure 3 Shown is a schematic diagram of the connection between the vertical guiding structure and the filter fixing structure of the utility model.

[0033] Figure 4 Shown is a schematic diagram of the structural assembly of the damping shaft of the present invention.

[0034] Figure 5 Shown is a structural sectional view of the damping shaft of the present invention.

[0035] Figure 6 Shown is a structural sectional view of the sleeve of the present invention.

[0036] Figure 7 Shown is a structural schematic diagram of the filter fixing structure of the utility model.

[0037] Figure 8 Display of the utility model Figure 7 Enlarged schematic diagram of the structure at point B in the middle.

[0038] Component number description

[0039] 1. Confocal Raman microscope body; 2. Sample carrier; 3. Vertical guide structure; 301. Vertical support rod; 302. Guide groove; 303. Limiting piece; 304. Damping shaft; 3041. Connecting shaft; 3042. Spring bead; 3043. Limiting plate; 3044. Connecting limiting sleeve; 3045. Damping groove; 4. Filter fixing structure; 401. Sliding connector; 4011. Sliding sleeve; 4012. Anti-rotation strip; 4013. Rubber gasket; 402. Support frame; 403. Filter mounting slot; 404. Bell mouth; 5. Filter body. DETAILED DESCRIPTION

[0040] The following describes the implementation of the present invention through specific embodiments. People familiar with this technology can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0041] See also Figures 1 to 8. It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of this utility model. Therefore, they have no substantive technical significance. Any modification of the structure, change in the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by this utility model without affecting the efficacy and purpose that can be achieved by this utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of this utility model. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of this utility model without substantially changing the technical content.

[0042] like Figures 1-8 As shown, the present invention provides a filter fixing device for a confocal Raman microscope, including a sample carrier 2, which is used to support and position a glass slide. The sample carrier 2 is located at the bottom of the optical lens and laser emission head of the confocal Raman microscope body 1.

[0043] A vertical guide structure 3 is positioned above the sample carrier 2. Its lower end is rotatably connected to the top of the sample carrier 2. A filter-mounting structure 4 is positioned on its outer surface. This structure can be moved up and down along the guide structure to adjust its height. Furthermore, when the filter body 5 is not required, the angle of the filter-mounting structure 4 can be adjusted by rotating the guide structure 3, preventing interference with operator control.

[0044] A removable filter body 5 is attached to the side of the filter mounting structure 4, allowing for replacement of different colored filter bodies 5 to accommodate different materials. The filter body 5 is positioned horizontally directly above the sample stage 2. During laser output, the filter body 5 filters the fluorescence of the material on the sample stage 2, reducing interference.

[0045] In some embodiments, there are two vertical guide structures 3, which are symmetrically distributed about the centerline of the sample carrier 2. The vertical guide structures 3 are located at the left and right edges of the sample carrier 2. Although a single set of vertical guide structures 3 and filter fixing structures 4 can also support the filter body 5, the single set of vertical guide structures 3 and filter fixing structures 4 working together to fix the filter body 5 causes the filter body 5 to be subjected to unilateral force, resulting in poor stability and high pressure on the vertical guide structures 3 and filter fixing structures 4. At the same time, an opening is left between the two sets of filter fixing structures 4, which facilitates the operator's manipulation of materials on the sample carrier 2 when the filter body 5 is not installed.

[0046] The filter-fixing structures 4 disposed on the outer surfaces of the two vertical guide structures 3 are arranged in mirror-image orientation with respect to the centerline of the sample carrier 2, enabling the openings of the filter-fixing structures 4 for fixing the filter body 5 to face each other. This allows the filter body 5 to be fixed from both sides, improving the stability of the fixation and allowing for greater stability when adjusting the height of the filter body 5.

[0047] In some embodiments, the vertical guide structure 3 includes a vertical support rod 301, the top of which is fixedly connected to a limiter 303. This limiter 303 limits the height of the filter mounting structure 4, thereby preventing contact between the filter body 5 and the optical lens of the confocal Raman microscope body 1. A damping shaft 304 is provided at the bottom of the vertical support rod 301 and is inserted into the interior of the sample support platform 2. This allows the vertical support rod 301 to rotate without being too flexible.

[0048] In some embodiments, the filter fixing structure 4 includes a sliding connector 401, which is sleeved onto the outer surface of the vertical support rod 301. A support frame 402 is provided on the outer surface of the sliding connector 401. The height of the support frame 402 is adjusted by raising and lowering the sliding connector 401, thereby adjusting the height of the filter body 5. A filter mounting slot 403 is provided on the side of the support frame 402. The edge of the filter body 5 is mounted within the filter mounting slot 403, thereby supporting the filter body 5 and stably positioning the filter body 5 directly above the sample support table 2. When installing the filter body 5, it only needs to be inserted from the mouth of the filter mounting slot 403 to achieve installation, which is convenient and quick. Due to the position limit of the filter body 5, the height of the support frame 402 on both sides of the filter body 5 will also remain consistent.

[0049] In some embodiments, the sliding connector 401 includes a sliding sleeve 4011, the inner surface of which is provided with a plurality of anti-rotation strips 4012. Furthermore, the outer surface of the vertical support rod 301 is provided with a guide groove 302, and the plurality of anti-rotation strips 4012 engage with the guide groove 302. The engagement of the anti-rotation strips 4012 with the guide groove 302 limits the angle of the sliding sleeve 4011, preventing the sliding sleeve 4011 from rotating on the outer surface of the vertical support rod 301.

[0050] If the sliding sleeves 4011 are not angle-limited, it will be difficult for the support frames 402 fixed on the two sets of sliding sleeves 4011 to remain parallel. Moreover, after the support frames 402 fix the filter body 5, the filter body 5 may become loose and fall due to the change in the angle between the support frames 402.

[0051] A rubber gasket 4013 is provided between two adjacent anti-rotation bars 4012. The anti-rotation bars 4012 can be plugged into the guide grooves 302, and the rubber gasket 4013 overlaps the outer surface of the vertical support rod 301. The provision of the rubber gasket 4013 increases the friction between the sliding sleeve 4011 and the outer surface of the vertical support rod 301, making the height positioning of the sliding sleeve 4011 more stable. Otherwise, the friction between the smooth outer surface of the vertical support rod 301 and the smooth inner wall of the sliding sleeve 4011 would be relatively small, and the pressure it can withstand would be relatively limited. When the sliding sleeve 4011 is subjected to pressure from the filter body 5, the sliding sleeve 4011 may slide down, thereby affecting the filtering effect of the filter body 5.

[0052] In some embodiments, the mouth of the filter mounting slot 403 is elastic so that it can adapt to filter bodies 5 of different thicknesses. Because the fluorescence of the materials to be detected is different, filter bodies 5 of different thicknesses are required to adapt to the materials. One end of the filter mounting slot 403 passes through the support frame 402 to facilitate the insertion of the filter body 5. The other end of the filter mounting slot 403 is closed and is used to limit the end of the filter body 5. A flare 404 is provided at one end of the filter mounting slot 403 that passes through the support frame 402, thereby enlarging the insertion mouth of the filter mounting slot 403 and making it more convenient to insert and fix the filter body 5.

[0053] In some embodiments, the damping shaft 304 includes a connecting shaft 3041, which is arranged at the lower part of the vertical support rod 301 and is used to support the vertical support rod 301. The vertical support rod 301 rotates with the connecting shaft 3041 as the rotating axis. A limiting disk 3043 is provided at the lower end of the connecting shaft 3041. A connecting limiting sleeve 3044 is sleeved on the outer surface of the connecting shaft 3041. The connecting limiting sleeve 3044 is embedded from the top of the sample support table 2 into the interior of the sample support table 2 to connect the connecting shaft 3041. The connecting shaft 3041 can also be rotated inside the connecting limiting sleeve 3044. An inverted "T"-shaped connecting hole is provided inside the connecting limiting sleeve 3044, and the limiting disk 3043 is limited by the inverted "T"-shaped connecting hole to prevent the connecting shaft 3041 from detaching from the interior of the connecting limiting sleeve 3044.

[0054] In some embodiments, the outer surface of the connecting shaft 3041 is provided with a spring bead 3042. The spring bead 3042 is elastic and has a similar structure to the stop bead at the connection of an umbrella's telescopic rod. The inner wall of the connecting stop sleeve 3044 is provided with recessed damping grooves 3045. The spring bead 3042 can be lodged between the damping grooves 3045, thereby limiting the rotation angle of the connecting shaft 3041. Specifically, when the connecting shaft 3041 is rotated, the spring bead 3042 contracts under the pressure generated by the torsion, allowing it to cross the damping grooves 3045 and rotate. When the torsion is removed from the connecting shaft 3041 and the spring bead 3042 is located between the damping grooves 3045, the spring bead 3042 loses pressure and pops out and becomes lodged between the damping grooves 3045, thereby positioning the angle of the connecting shaft 3041 and preventing it from rotating too flexibly.

[0055] A confocal Raman microscope spectrometer comprises the above filter fixing device, so that the confocal Raman microscope spectrometer has the effect of reducing fluorescence interference, and the filter body 5 can be easily disassembled, assembled and replaced.

[0056] The specific use process of this utility model is as follows:

[0057] When the filter body 5 is needed, first, the support frame 402 is rotated toward the middle so that the two support frames 402 are roughly parallel to each other;

[0058] Then, select a filter body 5 of appropriate color and thickness, insert the filter body 5 into the filter mounting slot 403 from the flare 404, support the filter body 5 with the support frame 402, and rotate the vertical support rod 301 again to close the two support frames 402 toward the middle, thus completely fixing the filter body 5.

[0059] Then, the confocal Raman microscope body 1 is activated to observe the material, and the height of the filter body 5 is adjusted by the sliding connection 401 according to the observation result, so that the height of the filter body 5 is at an ideal observation position;

[0060] After the material observation is completed, the filter body 5 is first pulled out, and then the support frames 402 on both sides are rotated outwards respectively to increase the angle between the support frames 402 to facilitate the removal of the material above the sample supporting platform 2.

[0061] In summary, the filter fixing device for a confocal micro-Raman spectrometer of the present invention installs a rotatable vertical support rod 301 on the sample supporting platform 2, and sleeves a sliding connector 401 on the outer surface of the vertical support rod 301, so that the support frame 402 installed on the outer surface of the sliding connector 401 can achieve the effect of moving up and down. When the filter body 5 needs to be fixed, the filter body 5 is inserted into the filter mounting groove 403 on the side of the support frame 402 and fixed, and the height of the filter body 5 is adjusted by moving the height of the sliding connector 401 up and down, thereby achieving the effect of facilitating the installation of the filter body 5 and being able to adjust the height of the filter body 5 as needed.

[0062] At the same time, the present invention provides a guide groove 302 on the outer surface of the vertical support rod 301 and an anti-rotation strip 4012 inside the sliding sleeve 4011. The cooperation between the anti-rotation strip 4012 and the guide groove 302 can prevent the sliding connector 401 from rotating on the outer surface of the vertical support rod 301. At the same time, a connecting shaft 3041 is provided at the bottom of the vertical support rod 301, and a retractable spring bead 3042 is provided on the outer surface of the connecting shaft 3041. The spring bead 3042 cooperates with the damping groove 3045 on the inner wall of the connecting limiting sleeve 3044 sleeved on the outer surface of the connecting shaft 3041, so that the vertical support rod 301 can both rotate and achieve the limiting effect, thereby improving the stability of the filter after installation.

[0063] Therefore, the utility model effectively overcomes various shortcomings in the prior art and has high industrial utilization value.

[0064] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed in the present invention are intended to be covered by the claims of the present invention.

Claims

1. A filter fixing device for a confocal Raman microscope, comprising a sample carrier (2); Its characteristics are: A vertical guide structure (3) is provided above the sample carrier (2), the lower end of the vertical guide structure (3) is connected to the top of the sample carrier (2) in a rotatable connection manner, and a filter fixing structure (4) is provided on the outer surface of the vertical guide structure (3), and the filter fixing structure (4) can move up and down along the vertical guide structure (3); A filter body (5) is detachably provided on the side of the filter fixing structure (4), and the filter body (5) is horizontally arranged directly above the sample supporting platform (2).

2. The filter fixing device for a confocal Raman microscope according to claim 1, characterized in that: The number of the vertical guide structures (3) is two, and the two vertical guide structures (3) are symmetrically distributed about the center line of the sample carrier (2), and the vertical guide structures (3) are located at the edges of the left and right sides of the sample carrier (2); The optical filter fixing structures (4) provided on the outer surfaces of the two vertical guiding structures (3) are distributed in a mirror-image manner with respect to the center line of the sample carrying platform (2).

3. The filter fixing device for a confocal Raman microscope according to claim 1, characterized in that: The vertical guide structure (3) includes a vertical support rod (301), the top of the vertical support rod (301) is fixedly connected to a limit member (303), and the bottom of the vertical support rod (301) is provided with a damping shaft (304), and the damping shaft (304) is inserted into the interior of the sample supporting platform (2).

4. The filter fixing device for a confocal Raman microscope according to claim 3, characterized in that: The outer surface of the vertical support rod (301) is provided with a guide groove (302).

5. The filter fixing device for a confocal Raman microscope according to claim 3, characterized in that: The optical filter fixing structure (4) comprises a sliding connection member (401), the sliding connection member (401) being sleeved on the outer surface of the vertical support rod (301), a support frame (402) being provided on the outer surface of the sliding connection member (401), a filter mounting groove (403) being provided on the side surface of the support frame (402), and an edge of the optical filter body (5) being mounted inside the filter mounting groove (403).

6. The filter fixing device for a confocal Raman microscope according to claim 5, characterized in that: The sliding connection member (401) includes a sliding sleeve (4011), the inner wall surface of the sliding sleeve (4011) is provided with a plurality of anti-rotation strips (4012), a rubber gasket (4013) is provided between two adjacent anti-rotation strips (4012), the anti-rotation strips (4012) can be plugged into the guide groove (302), and the rubber gasket (4013) overlaps the outer surface of the vertical support rod (301).

7. The filter fixing device for a confocal Raman microscope according to claim 5, characterized in that: The mouth of the filter mounting slot (403) is elastic, one end of the filter mounting slot (403) passes through the support frame (402), the other end of the filter mounting slot (403) is closed, and one end of the filter mounting slot (403) passing through the support frame (402) is provided with a bell mouth (404).

8. The filter fixing device for a confocal Raman microscope according to claim 3, characterized in that: The damping shaft (304) includes a connecting shaft (3041), the connecting shaft (3041) is arranged at the lower part of the vertical support rod (301), and a limiting plate (3043) is arranged at the lower end of the connecting shaft (3041); The outer surface of the connecting shaft (3041) is covered with a connecting limiting sleeve (3044), and an inverted "T"-shaped connecting hole is provided inside the connecting limiting sleeve (3044), and the limiting plate (3043) is limited by the inverted "T"-shaped connecting hole.

9. The filter fixing device for a confocal Raman microscope according to claim 8, characterized in that: The outer surface of the connecting shaft (3041) is provided with a spring bead (3042), and the spring bead (3042) is elastic; The inner wall of the connection limiting sleeve (3044) is provided with a concave damping groove (3045), and the spring bead (3042) can be stuck between the damping grooves (3045).

10. A confocal Raman microscope, characterized in that: The confocal Raman microscope spectrometer comprises the filter fixing device according to any one of claims 1 to 9.

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