Optical path adjusting structure of spectrograph and adjusting method thereof

Abstract

The invention belongs to the technical field of spectrometers, and discloses a spectrograph light path adjusting structure and an adjusting method thereof.The spectrograph light path adjusting structure comprises a spectrograph body, a light path light source is installed in the spectrograph body, a mounting frame is arranged at one end of the light path light source, and the mounting frame is slidably installed in the spectrograph body through a moving assembly; limiting rings are mounted on the two sides of the mounting frame, a lens is mounted in the mounting frame, rotating shafts are fixedly connected to the top end and the bottom end of the mounting frame, a first motor and a moving seat are arranged at the ends, away from the mounting frame, of the two rotating shafts correspondingly, and when the light path of the spectrometer needs to be adjusted, the lens is selectively controlled to rotate or move according to needs; the lens rotates to change the incident angle or focusing position of the light path, the distance between the lens and the light source of the light path is adjusted, the focusing point position of the light beam can be changed, adjustment is carried out by rotating the lens and moving the lens, and the measurement precision, flexibility and applicability of the spectrometer can be improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of spectrometers, and particularly relates to an optical path adjustment structure and an adjustment method of a spectrometer. Background Technique

[0002] A spectrometer is a precision instrument used to analyze the composition and structure of substances. Based on the interaction between substances and light (such as absorption, emission, scattering, etc.), it obtains spectral information. Spectrometers are widely used in fields such as chemistry, physics, biology, environmental science, and materials science; The optical path adjustment structure is an indispensable part of a spectrometer. It ensures the collimation, stability, and accuracy of the optical path by finely adjusting the optical path and the positions of optical elements; After retrieval, for example, in the patent: CN219842070U, an optical path adjustment mechanism of a spectrometer, which includes a spectrometer body and an optical path structure arranged in the incident port of the spectrometer body; it also includes an adjustment component for adjusting the optical path structure. The adjustment component includes a base arranged on the spectrometer body, a driving gear one and a driving gear two that are meshed with each other and connected inside the base, a servo motor connected inside the base and whose main shaft is connected to the surface of the driving gear one, a substrate connected to the inner wall surface on one side of the incident port of the spectrometer body, and a rotating rod rotatably connected inside the substrate. The top end of the rotating rod extends into the base and is docked with the driving gear two. The optical path structure is arranged on the rotating rod. Through the design of the adjustment component, under the power provided by the servo motor to switch back and forth, the spot size of the light source emitted by the optical path can be easily changed, and the excellent performance of the switching device can be achieved, so as to meet the use in different detection occasions and have a wider application range; At present, when adjusting the optical path of a spectrometer, mainly by rotating the lens to change the propagation direction of light, although it is simple and easy to operate, there are certain limitations, which affect the measurement accuracy, flexibility, and applicability of the spectrometer. Summary of the Invention

[0003] The purpose of the present invention is to provide an optical path adjustment structure and an adjustment method of a spectrometer to solve the problems raised in the above background technique.

[0004] To achieve the above purpose, the present invention provides the following technical solution: An optical path adjustment structure of a spectrometer, including a spectrometer body. An optical path light source is installed inside the spectrometer body. One end of the optical path light source is provided with a mounting frame. The mounting frame is slidably installed inside the spectrometer body through a moving component. Limiting rings are installed on both sides of the mounting frame. A lens is installed inside the mounting frame. Rotating shafts are fixedly connected to the top end and the bottom end of the mounting frame. One end of each of the two rotating shafts away from the mounting frame is respectively provided with a first motor and a moving seat. The first motor is installed inside the mounting seat; The moving component includes a second motor disposed inside the spectrometer body. The output end of the second motor is connected to a threaded rod, which is embedded in the inner wall of the moving seat and is in threaded connection therewith. The moving seat is slidably mounted inside the spectrometer body.

[0005] As a further technical solution of the present invention, both sides of the top end of the mounting seat are fixedly provided with limiting plates, and the limiting plates are slidably mounted inside the spectrometer body.

[0006] As a further technical solution of the present invention, clamping blocks are fixedly mounted on both sides of the mounting frame. The clamping blocks are evenly distributed in a circular shape, and the clamping blocks are embedded inside the limiting ring. A cleaning component is arranged inside the limiting ring.

[0007] As a further technical solution of the present invention, the cleaning component includes through holes opened inside the limiting ring. The through holes are evenly distributed in a circular shape. The bottom end of the limiting ring is fixedly connected to a first connecting pipe, and the bottom end of the first connecting pipe is mounted on the inner wall of the spectrometer body; A first gear is fixedly mounted on the outer wall of the threaded rod. A second gear is meshed with one side of the first gear. A reciprocating screw rod is fixedly mounted on the inner wall of the second gear. A piston rod is meshed with the outer wall of the reciprocating screw rod. The piston rod is slidably mounted inside the second connecting pipe. One end of the second connecting pipe is fixedly connected to a third connecting pipe and a fourth connecting pipe. The third connecting pipe is mounted at the bottom end of the first connecting pipe. One end of the fourth connecting pipe is provided with a storage cavity, and the storage cavity is opened inside the spectrometer body.

[0008] As a further technical solution of the present invention, the first connecting pipe is flexibly arranged.

[0009] As a further technical solution of the present invention, the through holes are inclined inwardly.

[0010] As a further technical solution of the present invention, one-way valves are mounted on the outer walls of the second connecting pipe and the fourth connecting pipe.

[0011] As a further technical solution of the present invention, a filter plate is arranged above the storage cavity, and the filter plate is mounted inside the spectrometer body.

[0012] As a further technical solution of the present invention, the inner wall diameter of the first gear is ten N times the inner wall diameter of the second gear, and N is a positive integer.

[0013] An adjustment method for an optical path adjustment structure of a spectrometer includes the following steps: S1: When it is necessary to adjust the optical path of the spectrometer, select to control the rotation or movement of the lens according to the requirements. When rotating, start the first motor through the PLC. When the first motor starts, it drives the rotating shaft to rotate. The rotation of the rotating shaft drives the rotation of the mounting bracket, and the rotation of the mounting bracket drives the rotation of the lens to change the incident angle or focusing position of the optical path. S2: When moving, start the second motor through the PLC. When the second motor starts, it drives the rotation of the threaded rod. The rotation of the threaded rod drives the movement of the moving seat, and the movement of the moving seat drives the movement of the mounting bracket, thereby driving the lens to move closer to or away from the optical path light source, adjusting the distance between the lens and the optical path light source, and changing the focusing point position of the light beam. S3: At the same time, the rotation of the threaded rod drives the rotation of the first gear, the rotation of the first gear drives the rotation of the second gear, the rotation of the second gear drives the rotation of the reciprocating screw rod, and the rotation of the reciprocating screw rod drives the piston rod to reciprocate inside the inner wall of the second connecting pipe. Connected through the second connecting pipe, the third connecting pipe and the fourth connecting pipe, a negative pressure is generated in the through hole, sucking impurities and dust on the lens surface into the storage cavity, keeping the lens clean during the optical path adjustment, and improving the light flux.

[0014] The beneficial effects of the present invention are as follows: Through the setting of the moving component, when it is necessary to adjust the optical path of the spectrometer, select to control the rotation or movement of the lens according to the requirements. When rotating, start the first motor through the PLC. When the first motor starts, it drives the rotating shaft to rotate. The rotation of the rotating shaft drives the rotation of the mounting bracket, and the rotation of the mounting bracket drives the rotation of the lens to change the incident angle or focusing position of the optical path. When moving, start the second motor through the PLC. When the second motor starts, it drives the rotation of the threaded rod. The rotation of the threaded rod drives the movement of the moving seat, and the movement of the moving seat drives the movement of the mounting bracket, thereby driving the lens to move closer to or away from the optical path light source, adjusting the distance between the lens and the optical path light source, and changing the focusing point position of the light beam. Adjusting by rotating and moving the lens helps to improve the measurement accuracy, flexibility and applicability of the spectrometer.

[0015] Through the setting of the cleaning component, when adjusting the optical path, the rotation of the threaded rod drives the rotation of the first gear, the rotation of the first gear drives the rotation of the second gear, the rotation of the second gear drives the rotation of the reciprocating screw rod, and the rotation of the reciprocating screw rod drives the piston rod to reciprocate inside the inner wall of the second connecting pipe. Connected through the second connecting pipe, the third connecting pipe and the fourth connecting pipe, a negative pressure is generated in the through hole, sucking impurities and dust on the lens surface into the storage cavity, avoiding dust adsorption, keeping the lens surface clean, thereby reducing the scattering and absorption of light, ensuring that more light passes through the lens, and improving the light flux.

[0016] In the present invention, the limiting ring is detachably connected to the mounting bracket. A clamping groove for the clamping block to be inserted is formed on one side of the limiting ring close to the mounting bracket, and the clamping block and the clamping groove are magnetically connected, which facilitates the quick removal of the lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is a schematic cross-sectional view of the overall structure of the present invention; Figure 3 is a schematic diagram of the structure at the optical path light source and the mounting bracket of the present invention; Figure 4 is a schematic cross-sectional view of a partial structure of the spectrometer body of the present invention; Figure 5 For the present invention Figure 4 is an enlarged schematic view of the structure at A in; Figure 6 is a schematic diagram of the structure at the mounting bracket and the limiting ring of the present invention; Figure 7 is a schematic cross-sectional view of the structure at the mounting bracket and the limiting ring of the present invention.

[0018] In the figure: 1. Spectrometer body; 2. Optical path light source; 3. Mounting bracket; 4. Lens; 5. Rotating shaft; 6. Mounting seat; 7. First motor; 8. Moving seat; 9. Threaded rod; 10. Second motor; 11. Limiting plate; 12. Limiting ring; 13. Through hole; 14. First connecting pipe; 15. First gear; 16. Second gear; 17. Reciprocating lead screw; 18. Piston rod; 19. Second connecting pipe; 20. Third connecting pipe; 21. Fourth connecting pipe; 22. Storage cavity; 23. Filter plate; 26. Clamping block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] Such as Figures 1 to 7As shown in the figure, in an embodiment of the present invention, an optical path adjustment structure of a spectrometer includes a spectrometer body 1. An optical path light source 2 is installed inside the spectrometer body 1. One end of the optical path light source 2 is provided with a mounting bracket 3. The mounting bracket 3 is slidably installed inside the spectrometer body 1 through a moving component. Limiting rings 12 are installed on both sides of the mounting bracket 3. A lens 4 is installed inside the mounting bracket 3. Rotating shafts 5 are fixedly connected to the top and bottom of the mounting bracket 3. One ends of the two rotating shafts 5 away from the mounting bracket 3 are respectively provided with a first motor 7 and a moving seat 8. The first motor 7 is installed inside a mounting seat 6; The moving component includes a second motor 10 arranged inside the spectrometer body 1. The output end of the second motor 10 is connected to a threaded rod 9. The threaded rod 9 is embedded in the inner wall of the moving seat 8 and is threadedly connected. The moving seat 8 is slidably installed inside the spectrometer body 1.

[0021] Existing: CN219842070U discloses an optical path adjustment mechanism of a spectrometer. The spectrometer body 1, the optical path light source 2, and the lens 4 proposed in this application document are disclosed in this patent. These technical means will not be elaborated one by one here; When it is necessary to adjust the optical path of the spectrometer, the lens 4 is selected to be rotated or moved according to requirements. When rotating, the first motor 7 is controlled to start through the PLC. When the first motor 7 starts, it drives the rotating shaft 5 to rotate. The rotation of the rotating shaft 5 drives the rotation of the mounting bracket 3. The rotation of the mounting bracket 3 drives the rotation of the lens 4 to change the incident angle or focusing position of the optical path; When moving, the second motor 10 is controlled to start through the PLC. When the second motor 10 starts, it drives the rotation of the threaded rod 9. The rotation of the threaded rod 9 drives the movement of the moving seat 8. The movement of the moving seat 8 drives the movement of the mounting bracket 3, thereby driving the lens 4 to move in a direction closer to or farther from the optical path light source 2. Adjusting the distance between the lens 4 and the optical path light source 2 can change the focusing point position of the light beam. Adjusting by rotating the lens 4 and moving the lens 4 helps to improve the measurement accuracy, flexibility, and applicability of the spectrometer.

[0022] Such as Figure 3 and 6 As shown in the figure, limiting plates 11 are fixedly installed on both sides of the top of the mounting seat 6. The limiting plates 11 are slidably installed inside the spectrometer body 1.

[0023] A sliding groove for the limiting plate 11 to slide is opened on the inner wall of the spectrometer body 1, which is used to guide and limit the movement of the mounting seat 6 and improve the stability during adjustment.

[0024] Such as Figure 6 and 7 As shown in the figure, clamping blocks 26 are fixedly installed on both sides of the mounting bracket 3. The clamping blocks 26 are evenly distributed in a ring shape. The clamping blocks 26 are embedded inside the limiting rings 12. A cleaning component is arranged inside the limiting rings 12.

[0025] A clamping groove for the clamping block 26 to be embedded is provided on one side of the limiting ring 12 close to the mounting bracket 3, and the clamping block 26 and the clamping groove are magnetically connected, which is convenient for quickly taking out the lens 4.

[0026] As Figures 4 to 7 As shown, the cleaning assembly includes through holes 13 opened inside the limiting ring 12. The through holes 13 are evenly distributed in a ring shape. The bottom end of the limiting ring 12 is fixedly connected with a first connecting pipe 14, and the bottom end of the first connecting pipe 14 is installed on the inner wall of the spectrometer body 1; A first gear 15 is fixedly installed on the outer wall of the threaded rod 9. A second gear 16 is meshed and connected to one side of the first gear 15. A reciprocating lead screw 17 is fixedly installed on the inner wall of the second gear 16. A piston rod 18 is meshed and connected to the outer wall of the reciprocating lead screw 17. The piston rod 18 is slidably installed inside the second connecting pipe 19. One end of the second connecting pipe 19 is fixedly connected with a third connecting pipe 20 and a fourth connecting pipe 21. The third connecting pipe 20 is installed at the bottom end of the first connecting pipe 14. One end of the fourth connecting pipe 21 is provided with a storage cavity 22, and the storage cavity 22 is opened inside the spectrometer body 1.

[0027] A piston head is fixedly installed at one end of the second connecting pipe 19 away from the reciprocating lead screw 17, and the piston head is slidably attached to the inner wall of the second connecting pipe 19; The inner cavities of the limiting ring 12, the first connecting pipe 14, the second connecting pipe 19, the third connecting pipe 20 and the fourth connecting pipe 21 are communicated; When adjusting the optical path, the rotation of the threaded rod 9 drives the rotation of the first gear 15. The rotation of the first gear 15 drives the rotation of the second gear 16. The rotation of the second gear 16 drives the rotation of the reciprocating lead screw 17. The rotation of the reciprocating lead screw 17 drives the piston rod 18 to reciprocate inside the inner wall of the second connecting pipe 19. Connected through the second connecting pipe 19, the third connecting pipe 20 and the fourth connecting pipe 21, a negative pressure is generated in the through hole 13, and impurities and dust on the surface of the lens 4 are sucked into the storage cavity 22, avoiding dust adsorption, keeping the surface of the lens 4 clean, thereby reducing the scattering and absorption of light, ensuring that more light passes through the lens 4, and improving the light flux.

[0028] As Figures 4 to 7 As shown, the first connecting pipe 14 is flexible.

[0029] The first connecting pipe 14 is arranged as a corrugated pipe, which has a certain stretching effect, ensuring the stability and reliability of the connection when the lens 4 moves.

[0030] As Figure 7 As shown, the through hole 13 is inclined inward.

[0031] A larger area of the surface of the lens 4 can be covered, ensuring that dust is evenly sucked off, avoiding local omission, and thus improving the cleaning effect of the lens 4.

[0032] As Figure 5 shown, check valves are installed on the outer walls of the second connecting pipe 19 and the fourth connecting pipe 21.

[0033] Control the gas flow direction to make the gas enter from the third connecting pipe 20 and discharge from the fourth connecting pipe 21.

[0034] As Figure 5 shown, a filter plate 23 is provided above the storage cavity 22, and the filter plate 23 is installed inside the spectrometer body 1.

[0035] Filter the discharged gas through the filter plate 23 to prevent dust from floating out and reattaching to the surface of the lens 4; The filter plate 23 is connected to the spectrometer body 1 by bolts, which facilitates the cleaning of impurities inside the storage cavity 22.

[0036] As Figure 5 shown, the inner wall diameter of the first gear 15 is ten N times the inner wall diameter of the second gear 16, and N is a positive integer.

[0037] Through the gear ratio between the first gear 15 and the second gear 16, increase the rotation speed of the second gear 16, thereby improving the efficiency of dust suction and cleaning.

[0038] An adjustment method for the optical path adjustment structure of a spectrometer includes the following steps: S1: When the optical path of the spectrometer needs to be adjusted, select to control the rotation or movement of the lens 4 according to the requirements. When rotating, start the first motor 7 through the PLC. When the first motor 7 starts, it drives the rotating shaft 5 to rotate. The rotation of the rotating shaft 5 drives the rotation of the mounting bracket 3, and the rotation of the mounting bracket 3 drives the rotation of the lens 4 to change the incident angle or focusing position of the optical path; S2: When moving, start the second motor 10 through the PLC. When the second motor 10 starts, it drives the rotation of the threaded rod 9. The rotation of the threaded rod 9 drives the movement of the moving seat 8. The movement of the moving seat 8 drives the movement of the mounting bracket 3, thereby driving the lens 4 to move in the direction of approaching or moving away from the optical path light source 2, and adjusting the distance between the lens 4 and the optical path light source 2 can change the focusing point position of the light beam; S3: At the same time, the rotation of the threaded rod 9 drives the rotation of the first gear 15. The rotation of the first gear 15 drives the rotation of the second gear 16. The rotation of the second gear 16 drives the rotation of the reciprocating screw rod 17. The rotation of the reciprocating screw rod 17 drives the piston rod 18 to reciprocate inside the second connecting pipe 19. Connected through the second connecting pipe 19, the third connecting pipe 20 and the fourth connecting pipe 21, a negative pressure is generated in the through hole 13, sucking the impurities and dust on the surface of the lens 4 into the storage cavity 22, keeping the lens 4 clean during the optical path adjustment of the device, and improving the light flux.

[0039] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art will appreciate that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An optical path adjustment structure of a spectrometer, comprising a spectrometer body (1), characterized in that: Inside the spectrometer body (1), an optical path light source (2) is installed. One end of the optical path light source (2) is provided with a mounting bracket (3). The mounting bracket (3) is slidably installed inside the spectrometer body (1) through a moving component. Limiting rings (12) are installed on both sides of the mounting bracket (3). A lens (4) is installed inside the mounting bracket (3). Rotating shafts (5) are fixedly connected to the top and bottom of the mounting bracket (3). One end of each of the two rotating shafts (5) away from the mounting bracket (3) is respectively provided with a first motor (7) and a moving seat (8). The first motor (7) is installed inside a mounting seat (6). The moving component includes a second motor (10) arranged inside the spectrometer body (1). The output end of the second motor (10) is connected to a threaded rod (9). The threaded rod (9) is embedded in the inner wall of the moving seat (8) and is in threaded connection therewith. The moving seat (8) is slidably installed inside the spectrometer body (1).

2. The optical path adjustment structure of a spectrometer according to claim 1, wherein: On both sides of the top of the mounting seat (6), limiting plates (11) are fixedly installed. The limiting plates (11) are slidably installed inside the spectrometer body (1).

3. The optical path adjustment structure of a spectrometer according to claim 1, characterized in that: On both sides of the mounting bracket (3), clamping blocks (26) are fixedly installed. The clamping blocks (26) are evenly distributed in a ring shape. The clamping blocks (26) are embedded inside the limiting rings (12). A cleaning component is arranged inside the limiting rings (12).

4. The optical path adjustment structure of a spectrometer according to claim 3, wherein: The cleaning component includes through holes (13) opened inside the limiting rings (12). The through holes (13) are evenly distributed in a ring shape. The bottom end of the limiting ring (12) is fixedly connected to a first connecting pipe (14). The bottom end of the first connecting pipe (14) is installed on the inner wall of the spectrometer body (1). On the outer wall of the threaded rod (9), a first gear (15) is fixedly installed. On one side of the first gear (15), a second gear (16) is meshed. Inside the second gear (16), a reciprocating lead screw (17) is fixedly installed. On the outer wall of the reciprocating lead screw (17), a piston rod (18) is meshed. The piston rod (18) is slidably installed inside a second connecting pipe (19). One end of the second connecting pipe (19) is fixedly connected to a third connecting pipe (20) and a fourth connecting pipe (21). The third connecting pipe (20) is installed at the bottom end of the first connecting pipe (14). One end of the fourth connecting pipe (21) is provided with a storage cavity (22). The storage cavity (22) is opened inside the spectrometer body (1).

5. The optical path adjustment structure of a spectrometer according to claim 4, wherein: The first connecting pipe (14) is flexibly arranged.

6. The optical path adjustment structure of a spectrometer according to claim 4, characterized in that: The through holes (13) are inclined inward.

7. The optical path adjustment structure of a spectrometer according to claim 4, characterized in that: Check valves are installed on the outer walls of the second connecting pipe (19) and the fourth connecting pipe (21).

8. The optical path adjustment structure of a spectrometer according to claim 4, wherein: Above the storage cavity (22), a filter plate (23) is arranged. The filter plate (23) is installed inside the spectrometer body (1).

9. The optical path adjustment structure of a spectrometer according to claim 4, wherein: The inner wall diameter of the first gear (15) is ten N times the inner wall diameter of the second gear (16), and N is a positive integer.

10. A method for adjusting the optical path of an optical path adjustment structure of a spectrometer, which is applicable to the optical path adjustment structure of a spectrometer described in the above claims 1-9, characterized in that, Including the following steps: S1: When the optical path of the spectrometer needs to be adjusted, the control lens (4) is selected to rotate or move according to requirements. When rotating, the first motor (7) is started by the PLC. When the first motor (7) starts, it drives the rotating shaft (5) to rotate. The rotation of the rotating shaft (5) drives the rotation of the mounting bracket (3), and the rotation of the mounting bracket (3) drives the rotation of the lens (4) to change the incident angle or focusing position of the optical path. S2: When moving, the second motor (10) is started by the PLC. When the second motor (10) starts, it drives the rotation of the threaded rod (9). The rotation of the threaded rod (9) drives the movement of the moving seat (8). The movement of the moving seat (8) drives the movement of the mounting bracket (3), thereby driving the lens (4) to move in the direction closer to or farther from the optical path light source (2), adjusting the distance between the lens (4) and the optical path light source (2), and changing the focusing point position of the light beam. S3: At the same time, the rotation of the threaded rod (9) drives the rotation of the first gear (15). The rotation of the first gear (15) drives the rotation of the second gear (16). The rotation of the second gear (16) drives the rotation of the reciprocating screw rod (17). The rotation of the reciprocating screw rod (17) drives the piston rod (18) to reciprocate inside the inner wall of the second connecting pipe (19). Connected through the second connecting pipe (19), the third connecting pipe (20) and the fourth connecting pipe (21), a negative pressure is generated in the through hole (13) to suck impurities and dust on the surface of the lens (4) into the storage cavity (22), so that the lens (4) remains clean during the optical path adjustment of the device, improving the light flux.

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