Raman spectrometer

Abstract

The utility model relates to the technical field of spectrometers, and provides a Raman spectrometer which comprises a shell frame, a main control board, a collimating concave reflector, a focusing concave reflector, a slit assembly, a CCD (Charge Coupled Device) sealing cavity assembly and a grating assembly, the shell frame is defined by a shell cover plate, a main cavity, side plates and a bottom plate; the main cavity is provided with a light inlet, and the slit assembly is installed on the side, located in the main cavity, of the light inlet. The main cavity is provided with a first interface, a second interface and a third interface around the light inlet; the optical axes of the first interface, the second interface and the third interface are aligned with the optical axis of the slit assembly in a centering manner. The Raman spectrometer provided by the utility model is provided with three different interfaces, so that the optical fiber, the optical cage system, the optical element and the corresponding optical machinery can be directly aligned with the slit assembly for operation, the conversion process of the optical cage system, the optical element and the corresponding optical machinery is reduced, the cost is reduced, and the experiment operation is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of spectrometers, in particular to a Raman spectrometer. Background Art

[0002] Raman spectroscopy, based on the principles of molecular vibration, provides a precise spectral analysis method for fields such as medical diagnosis, materials science, and chemical reaction analysis. A key component of this technology is the Raman spectrometer, which collects Raman scattering signals and converts them into easily interpretable digital spectra.

[0003] Although large Raman spectrometers occupy an important position in the field of scientific research due to their excellent spectral resolution and sensitivity, they also have some limitations, such as complex debugging process, high maintenance cost, and high technical requirements for operators.

[0004] Compact Raman spectrometers, with their compact size, high sensitivity, and excellent spectral resolution, offer a simpler, more economical solution. They are easy to install and intuitive to operate, making them ideal for rapid field testing. Combined with a variety of sample holders, compact Raman spectrometers can flexibly adapt to a variety of application environments, making them an ideal choice for researchers and field analysts, especially when portability and rapid response are crucial.

[0005] The mainstream modular Raman spectrometers currently on the market generally use fiber optic interfaces. This single interface design has two problems. On the one hand, these modular Raman spectrometers may encounter compatibility challenges in diverse application scenarios, thus limiting the wide expansion of their application areas. On the other hand, due to the inherent characteristics of fiber optic interfaces, they are often accompanied by high costs during maintenance and upgrades, and it is difficult to carry out technology iterations and system upgrades. Utility Model Content

[0006] In order to solve the deficiencies in the above-mentioned prior art, the present invention provides a Raman spectrometer, comprising: an outer shell frame, a main control board, a collimating concave reflector, a focusing concave reflector, a slit assembly, a CCD sealed cavity assembly and a grating assembly; the outer shell frame is formed by a shell cover, a main cavity, a side plate and a bottom plate; the main control board is installed on the top of the main cavity, and the collimating concave reflector, the focusing concave reflector, the slit assembly and the grating assembly are installed inside the main cavity; the CCD sealed cavity assembly is arranged between the main cavity and the side plate; a first light-transmitting hole is opened on the side wall of the main cavity, and a second light-transmitting hole is provided on the CCD sealed cavity assembly, and light enters the CCD sealed cavity assembly through the first light-transmitting hole and the second light-transmitting hole; the main cavity is provided with a light inlet, and the slit assembly is installed on a side of the light inlet located inside the main cavity; the main cavity is provided with a first interface, a second interface and a third interface around the light inlet; the optical axes of the first interface, the second interface and the third interface are aligned with the optical axis of the slit assembly.

[0007] Furthermore, the first interface is an optical fiber interface provided on the slot assembly.

[0008] Furthermore, the second interface includes a plurality of interface holes arranged along the circumference of the light inlet, and the interface holes are used for installing cage rods.

[0009] Furthermore, the interface hole is a threaded hole.

[0010] Furthermore, the third interface is an SM1 threaded hole.

[0011] Furthermore, the Raman spectrometer also includes a heat dissipation component, which is installed at the rear of the CCD sealed cavity component. The side panel is also provided with heat dissipation holes, and the heat dissipation component performs gas circulation and heat exchange through the heat dissipation holes.

[0012] Furthermore, a light path cover plate is provided on the top of the main cavity, and the light path cover plate seals the interior of the main cavity.

[0013] Based on the above, compared with the prior art, the Raman spectrometer provided by the present invention is provided with three different interfaces, which can align the optical fiber, optical cage system, optical element and its corresponding optomechanics directly with the slit assembly for operation, thereby reducing the conversion process of the optical cage system, optical element and its corresponding optomechanics, reducing costs and facilitating experimental operations.

[0014] Other features and benefits of the present invention will be described in the following description, and in part will become apparent from the description, or understood by practicing the present invention. The objectives and other benefits of the present invention can be achieved and obtained through the structures specifically pointed out in the description, claims, and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work. The positional relationships described in the drawings in the following description are based on the directions of the components shown in the diagrams, unless otherwise specified.

[0016] Figure 1 An exploded view of the Raman spectrometer provided by the present utility model;

[0017] Figure 2 A schematic diagram of the optical path interface of the Raman spectrometer provided by the utility model;

[0018] Figure 3 A schematic diagram of the optical fiber access of the Raman spectrometer provided by the present invention;

[0019] Figure 4 A schematic diagram of the cage-type optical system of the Raman spectrometer provided by the present invention;

[0020] Figure 5 This is a schematic diagram of the Raman spectrometer sleeve system provided by the utility model.

[0021] Reference numerals:

[0022] Shell frame 10 Shell cover 11 Main cavity 12

[0023] Light inlet 121 First interface 122 Second interface 123

[0024] Interface hole 1231 Third interface 124 Side panel 13

[0025] Heat dissipation hole 131 bottom plate 14 main control board 20

[0026] Collimating concave reflector 30 Focusing concave reflector 40 Slit assembly 50

[0027] CCD sealed cavity assembly 60 First light transmission hole 61 Second light transmission hole 62

[0028] Grating assembly 70 Heat dissipation assembly 80 Light path cover 90 DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments; the technical features designed in different implementation modes of the present invention described below can be combined with each other as long as they do not conflict with each other; based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0030] In the description of the present invention, it should be noted that all terms used in the present invention (including technical terms and scientific terms) have the same meanings as those generally understood by ordinary technicians in the field to which the present invention belongs, and cannot be understood as limiting the present invention; it should be further understood that the terms used in the present invention should be understood to have meanings consistent with the meanings of these terms in the context of this specification and in the relevant fields, and should not be understood in an idealized or overly formal sense, unless explicitly defined as such in the present invention.

[0031] The utility model provides a Raman spectrometer, such as Figure 1 As shown, it includes: a housing frame 10, a main control board 20, a collimating concave reflector 30, a focusing concave reflector 40, a slit assembly 50, a CCD sealed cavity assembly 60 and a grating assembly 70.

[0032] The housing frame 10 is formed by a housing cover 11, a main cavity 12, side panels 13, and a bottom panel 14. Specifically, the housing cover 11, the main cavity 12, the side panels 13, and the bottom panel 14 are detachably connected, and the detachable connection method can be various methods such as threaded connection and clamping, which facilitates the maintenance of internal components.

[0033] In one embodiment, the main control board 20 is installed on the top of the main cavity 12; the main control board 20 receives the data collected by the CCD camera in the CCD sealed cavity, analyzes and processes the data, and the main control board 20 is provided with a data transmission structure, which can transmit the collected data to an external device for analysis and processing.

[0034] In one embodiment, the collimating concave reflector 30, the focusing concave reflector 40, the slit assembly 50 and the grating assembly 70 are installed inside the main cavity 12; the CCD sealed cavity assembly 60 is arranged between the main cavity 12 and the side plate 13; the side wall of the main cavity 12 is provided with a first light-transmitting hole 61, and the CCD sealed cavity assembly 60 is provided with a second light-transmitting hole 62, and light enters the CCD sealed cavity assembly 60 through the first light-transmitting hole 61 and the second light-transmitting hole 62; and the centers of the first light-transmitting hole 61 and the second light-transmitting hole 62 are aligned.

[0035] The specific implementation process is as follows: light enters the main cavity 12 from the slit assembly 50, is first transmitted to the collimating concave reflector 30, is then reflected by the collimating concave reflector 30 to the focusing concave reflector 40, and is then transmitted to the grating assembly 70. The grating assembly 70 transmits the light through the first light-transmitting hole 61 and the second light-transmitting hole 62 to the CCD camera in the CCD sealed cavity assembly 60.

[0036] Optionally, the first light-transmitting hole 61 and the second light-transmitting hole 62 may or may not be arranged relative to each other, as long as the grating assembly 70 can transmit light through the first light-transmitting hole 61 and the second light-transmitting hole 62 to the CCD sealed cavity assembly 60. Furthermore, when the first light-transmitting hole 61 and the second light-transmitting hole 62 are arranged relative to each other, they may or may not be centrally aligned, depending on the specific situation.

[0037] In one embodiment, the Raman spectrometer further includes a heat dissipation assembly 80 , which is installed at the rear of the CCD sealed cavity assembly 60 . The side panel 13 is further provided with heat dissipation holes 131 , through which the heat dissipation assembly 80 performs gas circulation and heat exchange.

[0038] Specifically, the main cavity 12 and the side panel 13 are separately provided, and the CCD sealed cavity assembly 60 is mounted on the side panel 13. A heat dissipation assembly 80 is provided within the side panel 13 and mounted at the rear of the CCD sealed cavity assembly 60. The heat dissipation assembly 80 can draw in external air through heat dissipation holes 131 provided in the side panel 13 to cool the CCD sealed cavity assembly 60, and simultaneously discharge the hot air through the heat dissipation holes 131, thereby forming an airflow circulation within the side panel 13. Preferably, the heat dissipation assembly 80 is a fan.

[0039] In one embodiment, an optical path cover plate 90 is further provided on the top of the main cavity 12 to seal the interior of the main cavity 12. Specifically, the collimating concave reflector 30, the focusing concave reflector 40, the slit assembly 50, and the grating assembly 70 are installed inside the main cavity 12. Because a heat dissipation assembly 80 is provided on the side panel 13, the heat dissipation assembly 80 drives the airflow, which may blow dust and other impurities into the interior of the main cavity 12. By adding the optical path cover plate 90 to seal the interior of the main cavity 12, the tightness of the interior of the main cavity 12 is ensured, preventing external dust from entering and interfering with the results.

[0040] Preferably, the optical path cover 90 is arranged at the bottom of the main control board 20, and a first mounting portion and a second mounting portion are provided at the top of the main cavity 12. The first mounting portion and the second mounting portion are at a certain distance in height, so that there is a certain distance between the main control board 20 and the optical path cover 90 after installation, thereby ensuring the safety of the devices after the installation of the two.

[0041] Preferably, the main cavity 12 and the side panels 13 are separately provided to ensure the separation of heat dissipation and light processing to a certain extent, that is, the heat dissipation of internal components is ensured without causing air flow interference due to heat dissipation.

[0042] In one embodiment, if Figure 2 As shown, the main cavity 12 is provided with a light inlet 121, and the slit assembly 50 is installed on one side of the light inlet 121 located inside the main cavity 12; the main cavity 12 is provided with a first interface 122, a second interface 123 and a third interface 124 around the light inlet 121; the optical axes of the first interface 122, the second interface 123 and the third interface 124 are aligned with the optical axis of the slit assembly 50.

[0043] In one embodiment, if Figure 3 As shown, the first interface 122 is an optical fiber interface provided on the slot assembly 50. The optical fiber interface is used to connect an external optical fiber, and the optical fiber interface is threadedly connected to the slot assembly 50, thereby aligning the optical axis of the optical interface with the optical axis of the slot assembly 50.

[0044] In one embodiment, if Figure 4 As shown, the second interface 123 includes several interface holes 1231 arranged circumferentially along the light inlet 121. These interface holes 1231 are used to mount cage rods. Preferably, the interface holes 1231 are threaded holes. Specifically, the exterior of the main cavity 12 is provided with four interface holes 1231 evenly spaced along its four corners. The interface holes 1231 are arranged at equal angles around the light inlet 121 and are threaded holes in a 4-40 threaded hole group compatible with a 30mm optical cage system. The four interface holes 1231 form a cage interface structure for connecting to a cage joint that carries light. The four cage rods of the cage joint are inserted into the four interface holes 1231 and fixed thereto by threads, with the light being positioned in the center of the cage joint. This cage interface structure facilitates the alignment of the optical axis of the slit device with the optical axis of the cage structure, enabling nearly lossless transmission of divergent light to the center of the slit.

[0045] It should be noted that the number of interface holes 1231 is not limited to 4, and can also be 3, 5, 6 or other numbers determined according to actual conditions.

[0046] In one embodiment, if Figure 5 As shown, the third interface 124 is an SM1 threaded hole. Specifically, the SM1 threaded hole is adapted to a 1-inch optical element and its corresponding optomechanical component, such as an optical sleeve, wherein the SM1 threaded hole is directly provided on the outer side wall of the main cavity 12 .

[0047] Preferably, three different interfaces are provided so that the optical fiber, optical cage system, optical element and corresponding optomechanical device can be directly aligned with the slit assembly 50 for operation, thereby reducing the conversion process of the optical cage system, optical element and corresponding optomechanical device, reducing costs and facilitating experimental operation.

[0048] In addition, those skilled in the art should understand that, although there are many problems in the prior art, each embodiment or technical solution of the present invention may be improved in only one or several aspects, without having to solve all the technical problems listed in the prior art or background art at the same time. Those skilled in the art should understand that the absence of any content in a claim should not be construed as a limitation on that claim.

[0049] Although this document frequently uses terms such as housing frame, housing cover, main cavity, light inlet, first interface, second interface, interface hole, third interface, side panel, heat dissipation hole, bottom plate, main control board, collimating concave reflector, focusing concave reflector, slit assembly, CCD sealed cavity assembly, first light-transmitting hole, second light-transmitting hole, grating assembly, heat dissipation assembly, light path cover, etc., it does not exclude the possibility of using other terms. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention; the terms "first", "second", etc. (if any) in the description and claims of the embodiments of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A Raman spectrometer, characterized in that: include: Shell frame, main control board, collimating concave reflector, focusing concave reflector, slit assembly, CCD sealed cavity assembly and grating assembly; The shell frame is formed by a shell cover plate, a main cavity, side plates and a bottom plate; The main control board is installed on the top of the main cavity, the collimating concave reflector, the focusing concave reflector, the slit assembly and the grating assembly are installed inside the main cavity; the CCD sealed cavity assembly is arranged between the main cavity and the side plate; The side wall of the main cavity is provided with a first light-transmitting hole, and the CCD sealed cavity assembly is provided with a second light-transmitting hole, and light enters the CCD sealed cavity assembly through the first light-transmitting hole and the second light-transmitting hole; The main cavity is provided with a light inlet, and the slit assembly is installed on a side of the light inlet located inside the main cavity; the main cavity is provided with a first interface, a second interface and a third interface around the light inlet; the optical axes of the first interface, the second interface and the third interface are aligned with the optical axis of the slit assembly.

2. The Raman spectrometer according to claim 1, characterized in that: The first interface is an optical fiber interface arranged on the slot assembly.

3. The Raman spectrometer according to claim 1, characterized in that: The second interface includes a plurality of interface holes arranged along the circumference of the light inlet, and the interface holes are used for installing cage rods.

4. The Raman spectrometer according to claim 3, characterized in that: The interface hole is a threaded hole.

5. The Raman spectrometer according to claim 1, characterized in that: The third interface is an SM1 threaded hole.

6. The Raman spectrometer according to claim 1, characterized in that: The Raman spectrometer further comprises a heat dissipation component, which is installed at the rear of the CCD sealed cavity component. The side plate is also provided with heat dissipation holes, and the heat dissipation component performs gas circulation and heat exchange through the heat dissipation holes.

7. The Raman spectrometer according to claim 1, characterized in that: A light path cover plate is also arranged on the top of the main cavity, and the light path cover plate seals the interior of the main cavity.

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