CN117269143B - High-resolution Raman spectrum detection equipment - Google Patents

Abstract

The present invention relates to the technical field of spectrum analyzers, and in particular to a high-resolution Raman spectrum detection device, comprising: a mounting plate, a first grating, a second grating and a bearing are arranged on the inner side of a detection device body, a rotating shaft is arranged in the bearing, a second mounting plate is arranged at one end of the rotating shaft, and a grating is arranged in the second mounting plate; the beneficial effect is: when in use, through the multi-level setting of the grating, first the laser passes through the grating, then the grating refracts the laser onto the first grating, and then the first grating is used to refract the laser onto the second grating, and finally the laser is refracted onto a solid parallel plate through the second grating, and then the light source is refracted into the device through the solid parallel plate, and the two-dimensional spectrum of wavelength-light intensity is obtained by combining the solid parallel plate and the multi-level grating, and the multi-level coordination of the grating, the first grating and the second grating further improves the resolution of the Raman spectrometer, so that the Raman spectrum detection resolution is higher and more convenient.

Description

A high-resolution Raman spectroscopy detection device

Technical Field

The invention relates to the technical field of spectrum analyzers, in particular to a high-resolution Raman spectrum detection device.

Background Art

When light shines on an object, light scattering will occur. The frequency of most scattered light remains unchanged, only the propagation direction changes. The frequency of a small part of scattered light changes. This scattering phenomenon in which the frequency changes is called Raman scattering. The frequency shift of Raman scattered light is related to the chemical bonds of the molecules. Different molecular bonds correspond to different Raman peaks. By measuring the frequency shift of scattered light relative to the incident light, the composition of the substance being tested can be determined; by analyzing the intensity of the Raman peak, the concentration of the components can be determined. In addition, the Raman scattering detection method has extremely low requirements for samples. The samples do not require pre-processing or sampling. The detection process is contactless and does not damage the samples. The detection speed is fast and it is convenient for on-site detection.

In the prior art, a dispersive Raman spectrometer mainly uses a grating to split Raman light, and then obtains a wavelength-intensity curve to perform component analysis on a substance.

However, in general, the dispersion ability of a single grating is not high, which makes it difficult to obtain high-resolution Raman spectra. In addition, the focal length of the imaging lens is long, which results in a large volume of the high-resolution Raman spectrometer and is unable to adapt to environments with requirements on payload. For this reason, we propose a high-resolution Raman spectrometer to solve the above technical problems.

Summary of the invention

The object of the present invention is to provide a high-resolution Raman spectrum detection device to solve the problems raised in the above background technology.

To achieve the above object, the present invention provides the following technical solutions: a high-resolution Raman spectrum detection device, comprising a detection device body, a planar array detector is arranged on the surface of the detection device body, a mounting plate, a first grating, a second grating and a bearing are arranged on the inner side of the detection device body, a solid parallel plate is arranged in the mounting plate, a rotating shaft is arranged in the bearing, a second mounting is arranged at one end of the rotating shaft, a base is arranged in the second mounting plate, and a grating is arranged on the surface of the base;

The second bearing has a rotating rod inserted in it, one end of the rotating rod is provided with a through hole, a positioning rod is arranged in the through hole, and a transmission wheel is sleeved on the surface of the rotating rod.

Preferably, a sealing cover is provided on the side of the detection device body, the second bearing is fixedly connected to the inner side of the detection device body, and one end of the rotating rod is fixedly connected to the inner ring surface of the second bearing.

Preferably, one end of the solid parallel plate is fixed in the mounting plate by a positioning bolt, the solid parallel plate is a square glass plate, the incident area of the solid parallel plate is coated with an anti-reflection film, and the non-incident area is coated with a visible light total reflection film and a visible light high reflection film.

Preferably, one end of the second mounting plate is fixedly connected to the end face of the rotating shaft, the base is also fixed inside the second mounting plate by means of positioning bolts, the first grating and the second grating are fixed at a certain angle to the inner side face of the detection device body, and a second transmission wheel is sleeved on the surface of the rotating shaft.

Preferably, a traction belt is sleeved on the surface of the second transmission wheel, and the second transmission wheel is driven by the traction belt and the transmission wheel, and the second transmission wheel is fixedly connected to the surface of the rotating shaft.

Preferably, a baffle is provided inside the rotating rod, a hole is provided on the surface of the baffle, a positioning rod passes through the hole provided on the surface of the baffle, a spring is sleeved on the surface of the positioning rod, one end of the spring is fixedly connected to the surface of the positioning rod, and the other end of the spring is fixedly connected to the surface of the baffle.

Preferably, a lifting hole is opened on the side of one end of the rotating rod, a vertical plate is provided at one end of the positioning rod, a pull ring is provided at the other end of the positioning rod, a limiting plate is provided at one end of the vertical plate, the limiting plate is an arc-shaped plate structure, and the vertical plate can be moved up and down in the lifting hole.

Preferably, the second bearing surface is provided with a second limit plate, the surface of the second limit plate is provided with raised patterns, the surface of the limit plate is provided with damping strips, multiple groups of damping strips are provided, and the multiple groups of damping strips are evenly fixed on the surface of the limit plate, and the limit plate and the second limit plate cooperate with the damping strips to perform limited sliding.

Preferably, the incident area of the solid parallel plate is located at the bottom of the first side surface, and the positioning rod can be rotated to drive the rotating rod to rotate with the aid of the second bearing, and the rotation of the rotating rod can drive the transmission wheel to rotate.

Compared with the prior art, the present invention has the following beneficial effects:

The present invention provides a high-resolution Raman spectrum detection device. When in use, through the multi-level setting of gratings, first the laser passes through the grating, then the grating refracts the laser onto the first grating, and then the first grating is used to refract the laser onto the second grating, and finally the laser is refracted onto the solid parallel plate through the second grating, and then the light source is refracted into the device through the solid parallel plate. By combining the solid parallel plate and the multi-level gratings, a two-dimensional spectrum of wavelength-light intensity is obtained. The multi-level coordination of the grating, the first grating and the second grating further improves the resolution of the Raman spectrometer, making it more convenient to detect Raman spectra with a higher resolution. This avoids the problem that the dispersion ability of a single grating is generally not high, which makes it inconvenient to obtain a high-resolution Raman spectrum, and the imaging lens has a long focal length, which leads to a large volume of the high-resolution Raman spectrometer and cannot adapt to environmental problems with requirements on the load.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a schematic diagram of the structure of the present invention;

Fig. 2 is a front view of the structure of the present invention;

Fig. 3 is a partial cross-sectional view of the structure of the present invention;

FIG4 is a schematic diagram of the structure of the rotating rod of the present invention;

FIG. 5 is a schematic diagram of the structure of the present invention when the structure is tilted.

In the figure: 1. detection equipment body; 2. area array detector; 3. mounting plate; 4. first grating; 5. second grating; 6. bearing; 7. solid parallel plate; 8. rotating shaft; 9. second mounting plate; 10. base; 11. grating; 12. second bearing; 13. rotating rod; 14. through hole; 15. positioning rod; 16. transmission wheel; 17. sealing cover; 18. positioning bolt; 19. second transmission wheel; 20. traction belt; 21. baffle; 22. spring; 23. lifting hole; 24. vertical plate; 25. limit plate; 26. second limit plate; 27. damping strip; 28. pull ring.

DETAILED DESCRIPTION

In order to make the purpose and technical solution of the present invention clearly and completely described, and the advantages more clearly understood, the embodiments of the present invention are further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to explain the embodiments of the present invention, and are not used to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

In the description of the present invention, it should be noted that the terms "center", "middle", "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", "side", "vertical", "horizontal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention 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 operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "one", "first", "second", "third", "fourth", "fifth", "sixth" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

For the purpose of simplicity and illustration, the principles of the embodiments are described primarily by reference to examples. In the following description, many specific details are presented to provide a thorough understanding of the embodiments. However, it is apparent that, for those of ordinary skill in the art, these embodiments may not be limited to these specific details in practice. In some instances, known methods and structures are not described in detail to avoid making these embodiments unnecessarily difficult to understand. In addition, all embodiments may be used in conjunction with each other.

Embodiment 1

Please refer to Figures 1 to 5. The present invention provides a technical solution: a high-resolution Raman spectrum detection device, comprising a detection device body 1, a planar array detector 2 is arranged on the surface of the detection device body 1, a mounting plate 3, a first grating 4, a second grating 5 and a bearing 6 are arranged on the inner side of the detection device body 1, a solid parallel plate 7 is arranged in the mounting plate 3, a rotating shaft 8 is arranged in the bearing 6, a second mounting plate 9 is arranged at one end of the rotating shaft 8, a base 10 is arranged in the second mounting plate 9, and a grating 11 is arranged on the surface of the base 10; a second bearing 12, a rotating rod 13 is inserted into the second bearing 12, a through hole 14 is opened at one end of the rotating rod 13, a positioning rod 15 is arranged in the through hole 14, and a transmission wheel 16 is sleeved on the surface of the rotating rod 13;

When in use, through the multi-level setting of the grating 11, the laser first passes through the grating 11, and then the grating 11 refracts the laser onto the first grating 4, and then the first grating 4 is used to refract the laser onto the second grating 5, and finally the laser is refracted onto the solid parallel plate 7 through the second grating 5, and then the light source is refracted into the device through the solid parallel plate 7. By combining the solid parallel plate 7 and the multi-level grating 11, a two-dimensional spectrum of wavelength-light intensity is obtained. The multi-level coordination of the grating 11, the first grating 4 and the second grating 5 further improves the resolution of the Raman spectrometer, making it more convenient to detect Raman spectra with higher resolution.

Embodiment 2

On the basis of the first embodiment, in order to facilitate the adjustment of the angle of the grating 11, a bearing 6 and a second bearing 12 are provided on the inner side of the detection device body 1, a sealing cover 17 is provided on the side of the detection device body 1, the second bearing 12 is fixedly connected to the inner side of the detection device body 1, one end of the rotating rod 13 is fixedly connected to the inner ring surface of the second bearing 12, one end of the solid parallel plate 7 is fixed in the mounting plate 3 by a positioning bolt 18, the solid parallel plate 7 is a square glass plate, the incident area of the solid parallel plate 7 is plated with an anti-reflection film, and the non-incident area is plated with a visible light total reflection film and a visible light high reflection film, and one end of the second mounting plate 9 is fixedly connected to the rotating shaft 8. The end surface, the base 10 is also fixed inside the second mounting plate 9 by means of positioning bolts 18, the first grating 4 and the second grating 5 are fixed at a certain angle to the inner side of the detection device body 1, the surface of the rotating shaft 8 is sleeved with a second transmission wheel 19, the surface of the second transmission wheel 19 is sleeved with a traction belt 20, the second transmission wheel 19 is belt-driven with the transmission wheel 16 by means of the traction belt 20, the second transmission wheel 19 is fixedly connected to the surface of the rotating shaft 8, the incident area of the solid parallel plate 7 is located at the bottom of the first side surface, the rotating rod 13 can be driven to rotate by means of the second bearing 12 by rotating the positioning rod 15, and the rotation of the rotating rod 13 can drive the transmission wheel 16 to rotate;

When the grating 11 needs to be adjusted in angle during use, the positioning rod 15 can be rotated to make the rotating rod 13 rotate with the help of the second bearing 12, so that the transmission wheel 16 can cooperate with the traction belt 20 to rotate the second transmission wheel 19, so that the rotating shaft 8 can be rotated, so that the second mounting plate 9 can be rotated at an angle, so that the grating 11 in the second mounting plate 9 can be refracted at an angle. The solid parallel plate 7 and the grating 11 are installed in the mounting plate 3 and the second mounting plate 9 by positioning bolts 18, which can be conveniently disassembled. The solid parallel plate 7 is arranged by coating the incident area of the surface with an anti-reflection film, and the non-incident area is respectively coated with a visible light total reflection film and a visible light high reflection film. In conjunction with the arrangement of the grating 11, on the one hand, the high resolution of the Raman spectrum can be improved, and on the other hand, the focal length of the imaging lens can be reduced, so that it can adapt to a variety of load environments.

Embodiment 3

On the basis of the second embodiment, in order to facilitate the limiting of the rotating rod 13, a limiting plate 25 is provided at one end of the positioning rod 15, a lifting hole 23 is opened on the side of one end of the rotating rod 13, a vertical plate 24 is provided at one end of the positioning rod 15, a pull ring 28 is provided at the other end of the positioning rod 15, and a limiting plate 25 is provided at one end of the vertical plate 24. The limiting plate 25 is an arc-shaped plate structure, and the vertical plate 24 can move up and down in the lifting hole 23. A baffle 21 is provided in the rotating rod 13, and a hole is opened on the surface of the baffle 21. The positioning rod 15 passes through the opening on the surface of the baffle 21. In the hole provided, a spring 22 is sleeved on the surface of the positioning rod 15, one end of the spring 22 is fixedly connected to the surface of the positioning rod 15, and the other end of the spring 22 is fixedly connected to the surface of the baffle 21. A second limiting plate 26 is provided on the surface of the second bearing 12, and a convex pattern is provided on the surface of the second limiting plate 26. A damping strip 27 is provided on the surface of the limiting plate 25, and multiple groups of damping strips 27 are provided. Multiple groups of damping strips 27 are evenly fixed on the surface of the limiting plate 25, and the limiting plate 25 and the second limiting plate 26 cooperate with the damping strip 27 to perform limited sliding;

During use, when it is necessary to rotate the positioning rod 15 to rotate the rotating rod 13, the pull ring 28 can be pulled to move the positioning rod 15 outward along the through hole 14, so that one end of the limit plate 25 can be separated from the second limit plate 26, so that the rotating rod 13 can be rotated. When it is rotated to a suitable angle for positioning, the pull ring 28 can be loosened to allow the positioning rod 15 to be reset with the help of the tension of the spring 22, so that the limit plate 25 contacts the surface of the second limit plate 26. The setting of the damping strip 27 can increase the friction between the limit plate 25 and the second limit plate 26. The setting of the spring 22 also increases the contact between the limit plate 25 and the second limit plate 26, so that the limit plate 25 increases the degree of extrusion of the second limit plate 26, thereby improving the stability of the limit.

In actual use, through the multi-level setting of the grating 11, the laser first passes through the grating 11, and then the grating 11 refracts the laser onto the first grating 4, and then the first grating 4 is used to refract the laser onto the second grating 5, and finally the laser is refracted onto the solid parallel plate 7 through the second grating 5, and then the light source is refracted into the device through the solid parallel plate 7. By combining the solid parallel plate 7 and the multi-level grating 11, a two-dimensional spectrum of wavelength-light intensity is obtained. The multi-level coordination of the grating 11, the first grating 4 and the second grating 5 further improves the resolution of the Raman spectrometer, making it more convenient to detect Raman spectra with a higher resolution, which avoids the problem that the dispersion ability of a single grating 11 is generally not high, it is not convenient to obtain a high-resolution Raman spectrum, and the focal length of the imaging lens is long, which leads to a large volume of the high-resolution Raman spectrometer and cannot adapt to environmental problems with requirements on the load.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims (2)

1. A high-resolution Raman spectroscopy detection device, comprising a detection device body (1), a surface array detector (2) being arranged on the surface of the detection device body (1), characterized in that: a mounting plate (3), a first grating (4), a second grating (5) and a bearing (6) are arranged on the inner side surface of the detection device body (1), a solid parallel plate (7) is arranged in the mounting plate (3), a rotating shaft (8) is arranged in the bearing (6), a second mounting plate (9) is arranged at one end of the rotating shaft (8), a base (10) is arranged in the second mounting plate (9), and a grating (11) is arranged on the surface of the base (10); A second bearing (12), a rotating rod (13) is inserted into the second bearing (12), a through hole (14) is formed at one end of the rotating rod (13), a positioning rod (15) is disposed in the through hole (14), and a transmission wheel (16) is sleeved on the surface of the rotating rod (13); One end of the solid parallel plate (7) is fixed in the mounting plate (3) by means of a positioning bolt (18); the solid parallel plate (7) is a square glass plate; the incident area of the solid parallel plate (7) is coated with an anti-reflection film, and the non-incident area is coated with a visible light total reflection film and a visible light high reflection film respectively; One end of the second mounting plate (9) is fixedly connected to the end surface of the rotating shaft (8); the base (10) is also fixed inside the second mounting plate (9) by means of positioning bolts (18); the first grating (4) and the second grating (5) are fixed to the inner side surface of the detection device body (1) at a certain angle; and a second transmission wheel (19) is sleeved on the surface of the rotating shaft (8); The surface of the second transmission wheel (19) is sleeved with a traction belt (20), the second transmission wheel (19) utilizes the traction belt (20) to perform belt transmission with the transmission wheel (16), and the second transmission wheel (19) is fixedly connected to the surface of the rotating shaft (8); A baffle (21) is disposed inside the rotating rod (13), a hole is formed on the surface of the baffle (21), a positioning rod (15) passes through the hole formed on the surface of the baffle (21), a spring (22) is sleeved on the surface of the positioning rod (15), one end of the spring (22) is fixedly connected to the surface of the positioning rod (15), and the other end of the spring (22) is fixedly connected to the surface of the baffle (21); A lifting hole (23) is provided on the side of one end of the rotating rod (13); a vertical plate (24) is provided on one end of the positioning rod (15); a pull ring (28) is provided on the other end of the positioning rod (15); a limiting plate (25) is provided on one end of the vertical plate (24); the limiting plate (25) is in an arc-shaped plate structure; and the vertical plate (24) can move up and down in the lifting hole (23); The surface of the second bearing (12) is provided with a second limit plate (26), the surface of the second limit plate (26) is provided with raised patterns, the surface of the limit plate (25) is provided with a damping strip (27), a plurality of groups of the damping strips (27) are provided, the plurality of groups of the damping strips (27) are evenly fixed on the surface of the limit plate (25), and the limit plate (25) and the second limit plate (26) cooperate with the damping strips (27) to perform limit sliding; The incident area of the solid parallel plate (7) is located at the bottom of the first side surface, and the rotation of the positioning rod (15) can drive the rotating rod (13) to rotate with the aid of the second bearing (12), and the rotation of the rotating rod (13) can drive the transmission wheel (16) to rotate. 2. A high-resolution Raman spectroscopy detection device according to claim 1, characterized in that: a sealing cover (17) is provided on the side of the detection device body (1), the second bearing (12) is fixedly connected to the inner side surface of the detection device body (1), and one end of the rotating rod (13) is fixedly connected to the inner ring surface of the second bearing (12).