A spectrometer detection device

Abstract

The present invention discloses a spectrometer detection device, which includes a laser, a sample stage, a CCD detector and a cooling and drying device; a first optical lens assembly is provided between the laser and the sample stage; a second optical lens assembly is provided between the sample stage and the CCD detector; the surface of the sample stage is provided with a noble metal nano-coating; a concave mirror is provided on one side of the sample stage. When using this device, the laser of the laser passes through the first optical lens assembly and irradiates onto the sample stage, causing the sample to be measured on the sample stage to generate optical signals including scattered light. This optical signal is transmitted to the CCD detector through the second optical lens assembly to realize the component detection and analysis of the sample to be measured. Among them, the noble metal nano-coating and the concave mirror improve the light intensity of the scattered light transmitted to the second optical lens assembly, and the cooling and drying device improves the signal-to-noise ratio of the CCD detector, thereby improving the detection accuracy and sensitivity of this spectrometer detection device for the sample to be measured.

Description

Technical Field

[0001] The present invention relates to the field of detection, and particularly to a spectrometer detection device. Background Art

[0002] Raman spectroscopy refers to analyzing the scattering spectrum of incident light irradiated on a substance to analyze and identify the type of the substance.

[0003] A Raman detector is a device that uses Raman spectroscopy to analyze the composition and type of a substance. When using a Raman detector to detect the composition and type of a substance, the incident light provided by the Raman detector is used to irradiate the substance to be detected, so that the substance to be detected emits scattered light with a frequency different from that of the incident light. The composition and type of the substance to be detected are determined by detecting and analyzing the displacement of the Raman spectrum in this scattered light.

[0004] However, since the scattered light emitted by the substance to be detected includes both Raman scattered light and Rayleigh scattered light, and moreover, the spectral line of the aforementioned Raman scattered light is very weak compared to the spectral line of Rayleigh scattered light, it is difficult to accurately detect the spectrum of Raman scattered light, resulting in low precision and low sensitivity of the Raman detector. Summary of the Invention

[0005] The object of the present invention is to provide a spectrometer detection device that can improve detection precision and sensitivity.

[0006] To achieve the above object, the present invention provides a spectrometer detection device, including a laser, a sample stage, a CCD detector, and a cooling and drying device disposed adjacent to the CCD detector; a first optical lens assembly for transmitting the laser of the laser to the sample to be measured on the sample stage is provided between the laser and the sample stage; a second optical lens assembly for transmitting the optical signal emitted by the sample to be measured to the CCD detector is provided between the sample stage and the CCD detector;

[0007] A noble metal nano-coating is provided on the surface of the sample stage;

[0008] A concave reflector is provided on one side of the sample stage away from the first optical lens assembly and the second optical lens assembly.

[0009] Preferably, the sample stage is provided with a temperature sensor and a temperature compensator.

[0010] Preferably, the noble metal nano-coating is specifically an Au coating or an Ag coating.

[0011] Preferably, the laser is specifically a semiconductor laser for providing laser with a wavelength of 780 nm.

[0012] Preferably, the cooling and drying device includes a semiconductor refrigerating sheet and a desiccant.

[0013] Preferably, it further includes a transparent sealed box body; the CCD detector, the desiccant, and the cold end of the semiconductor refrigerating sheet are all arranged inside the transparent sealed box body, and the hot end of the semiconductor refrigerating sheet is arranged outside the transparent sealed box body; the desiccant is specifically discolored silica gel.

[0014] Preferably, the first optical lens assembly includes a band-pass filter, a reflector, and a plano-convex lens; the surface of the reflector is a fully reflective surface; the surface of the plano-convex lens is provided with an anti-reflection film.

[0015] Preferably, the second optical lens assembly includes a fiber collimating lens, a holographic band-stop filter, and a beam splitter; the central wavelength of the holographic band-stop filter is equal to the wavelength of the laser provided by the laser.

[0016] Compared with the above-mentioned background art, the spectrometer detection device provided by the present invention includes a laser, a CCD detector, a sample stage, and a cooling and drying device arranged adjacent to the CCD detector; the surface of the sample stage is provided with a noble metal nano-coating, and a concave mirror is arranged on one side of the sample stage, and the concave mirror is located on the side of the sample stage away from the first optical lens and the second optical lens.

[0017] For this spectrometer detection device, the laser can provide laser with a specific wavelength to the outside; the noble metal nano-coating on the sample stage is placed with a sample to be measured. In this spectrometer detection device, a first optical lens assembly for transmitting the laser of the laser to the sample to be measured on the sample stage is arranged between the laser and the sample stage; a second optical lens assembly for transmitting the optical signal emitted by the sample to be measured to the CCD detector is arranged between the sample stage and the CCD detector.

[0018] When using this spectrometer detection device, the laser emitted by the laser sequentially passes through multiple lenses of the first optical lens assembly and is focused on the sample stage, and the sample to be measured on the sample stage generates an optical signal including Raman scattered light and Rayleigh scattered light under the irradiation of the laser. The foregoing optical signal generated by the sample to be measured is processed by the second optical lens assembly and transmitted into the CCD detector, so as to analyze the Raman scattered light in this optical signal by means of the CCD detector and realize the analysis of the components of the sample to be measured.

[0019] It can be seen that compared with the existing device, this spectrometer detection device enhances the light intensity of the Raman scattered rays transmitted from the sample stage to the second optical lens assembly by using the noble metal nano-coating and the concave mirror on the surface of the sample stage, and the cooling and drying device can improve the detection accuracy of the CCD detector by increasing the signal-to-noise ratio of the CCD detector. In summary, compared with the prior art, the spectrometer detection device provided by the present invention can improve the detection accuracy and sensitivity of the sample to be measured. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0021] Figure 1 It is a structural block diagram of a spectrometer detection device provided by an embodiment of the present invention;

[0022] Figure 2 It is a structural schematic diagram of a spectrometer detection device provided by an embodiment of the present invention.

[0023] Wherein, 1 - laser, 2 - sample stage, 3 - CCD detector, 4 - concave reflector, 51 - band-pass filter, 52 - reflector, 53 - plano-convex lens, 61 - fiber collimating lens, 62 - holographic band-stop filter, 63 - beam splitter, 7 - semiconductor refrigeration chip, 8 - transparent sealed box body, 9 - silica gel, 10 - circuit board. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the 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 belong to the scope of protection of the present invention.

[0025] In order to enable those skilled in the art of this technology to better understand the solution of the present invention, the present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0026] Please refer to Figure 1 and 2 , Figure 1 It is a structural block diagram of a spectrometer detection device provided by an embodiment of the present invention; Figure 2 It is a structural schematic diagram of a spectrometer detection device provided by an embodiment of the present invention.

[0027] The present invention provides a spectrometer detection device, including a laser 1, a sample stage 2, a CCD detector 3 and a cooling and drying device.

[0028] A sample stage 2 is placed with a sample to be measured. A laser 1 is used to emit laser light towards the sample to be measured on the sample stage 2, so as to cause the sample to be measured to emit an optical signal such as scattered light under the irradiation of the laser. A CCD detector 3 is located on one side of the sample stage 2 and is used to receive and detect the optical signal emitted by the sample to be measured. A cooling and drying device is arranged adjacent to the CCD detector 3 and is used to cool and dry the CCD detector 3.

[0029] A first optical lens assembly is provided between the laser 1 and the sample stage 2, and a second optical lens assembly is provided between the sample stage 2 and the CCD detector 3. The first optical lens assembly is used to transmit the laser light emitted by the laser 1 to the sample to be measured on the sample stage; the second optical lens assembly is used to transmit the optical signal emitted by the sample to be measured to the CCD detector 3.

[0030] The first optical lens assembly and the second optical lens assembly can be formed by optical lenses such as lenses and reflective lenses. As for the specific types and structural parameters of the optical lenses such as lenses and reflective lenses, and the relative position relationship settings between multiple optical lenses, they should be set according to the test requirements of the sample to be measured and the structural parameters and relative position relationship of the laser 1, the sample stage 2, and the CCD detector 3.

[0031] In this spectrometer detection device, the sample stage 2 has a mirror structure. The surface of the sample stage 2 is provided with a noble metal nano - coating, including but not limited to an Ag nano - coating. This noble metal nano - coating is used to enhance the optical signal emitted by the sample to be measured under the irradiation of the laser, especially the Raman scattered light in this optical signal. A concave mirror 4 is provided on one side of the sample stage 2. Obviously, in order to satisfy the transmission of light between the first optical lens assembly, the sample stage 2, and the second optical lens assembly, the concave mirror 4 is arranged on the side of the sample stage 2 away from the first optical lens assembly and the second optical lens assembly.

[0032] For example, the concave mirror 4 can be located on the opposite side of the sample to be measured. For example, if the sample to be measured is placed on the upper surface of the sample stage 2, the concave mirror 4 can be located at the bottom of the sample stage 2, including but not limited to being located on the bottom surface of the sample stage 2 or on the bottom surface and the peripheral side of the sample stage 2.

[0033] The CCD detector 3 can be connected to an acquisition circuit that is used to convert the optical signal collected by the CCD detector 3 into an electrical signal, which is convenient for analyzing the composition of the sample to be measured based on this electrical signal.

[0034] Since for every 6 - 7 °C decrease in the temperature of the CCD detector 3, the dark current of the CCD detector 3 will be halved, when the temperature of the CCD detector 3 drops to - 50 °C, the dark current noise of the CCD detector 3 can be ignored. Therefore, in order to improve the signal - to - noise ratio of the CCD detector 3, the spectrometer detection device provided by the present invention cools and dries the CCD detector 3 through the cooling and drying device.

[0035] When using the spectrometer detection device provided by the present invention, the laser emitted by the laser 1 is successively focused on the sample stage 2 through a plurality of lenses of the first optical lens assembly. The sample to be measured on the sample stage 2 generates optical signals such as Raman scattered light and Rayleigh scattered light under the irradiation of this laser. This optical signal generated by the sample to be measured is processed by the second optical lens assembly and transmitted into the CCD detector 3, and then the Raman scattered light in this optical signal is analyzed by means of the CCD detector 3 to analyze the composition of the sample to be measured.

[0036] Regarding the spectrometer detection device provided by the present invention, the noble metal nano-coating on the surface of the sample stage 2 enhances the light intensity of the Raman scattered rays transmitted from the sample stage 2 to the second optical lens assembly; the concave reflector 4 can collect the Raman scattered light and Rayleigh scattered light generated by the sample to be measured under the laser and scattered around, and reflect it into the scattering optical path where the second optical lens is located, further enhancing the intensity of the Raman scattered light; the cooling and drying device can improve the signal-to-noise ratio of the CCD detector 3 by reducing the temperature of the CCD detector 3. In summary, the noble metal nano-coating, the concave reflector 4 and the cooling and drying device can gradually improve the detection quality of the Raman scattered light generated by the sample to be measured by the CCD detector 3 during the light transmission process of the spectrometer detection device, thereby improving the detection accuracy and sensitivity of the spectrometer detection device for the sample to be measured.

[0037] The following further describes the spectrometer detection device provided by the present invention in conjunction with the accompanying drawings and embodiments.

[0038] Based on the above embodiments, in the spectrometer detection device provided by the present invention, the sample stage 2 is provided with a temperature sensor for real-time monitoring of the temperature of the sample stage 2 and a temperature compensator for adjusting the temperature of the sample stage 2.

[0039] The temperature compensator can adopt a device with a temperature adjustment function in the prior art, which can be a device with both heating and cooling functions, or can be specifically set as a heating device or a cooling device according to the temperature change trend of the sample stage 2 during actual use. The spectrometer detection device adjusts the temperature of the sample stage 2 and its sample to be measured in real time through the temperature sensor and the temperature compensator to ensure the detection accuracy of the spectrometer detection device for the sample to be measured.

[0040] As for the noble metal nano-coating on the surface of the sample stage 2, it can be specifically set as an Au coating or an Ag coating. The Au coating or the Ag coating can be set on the surface of the sample stage 2 by means of evaporation coating, and is used to enhance the Raman scattered light generated by the sample to be measured under laser irradiation.

[0041] For the laser 1 used in the present invention, it can be specifically set as a semiconductor laser for providing laser with a wavelength of 780 nm. Therefore, the wavelength of the laser emitted by the semiconductor laser is 785 nm. After the laser irradiates the sample to be measured, the Raman scattered light generated by the sample to be measured has a wavelength of 160 - 3150 nm. The Raman scattered light in this range is beneficial to the transmission of the second optical lens assembly and the detection of the CCD detector 3.

[0042] In addition, the semiconductor laser can be driven by a constant current power supply to generate laser with stable light intensity.

[0043] For the cooling and drying device used in the present invention, it can include a semiconductor refrigerating sheet 7 and a desiccant.

[0044] The semiconductor refrigerating sheet 7 is used to cool the CCD detector 3; the desiccant is used to absorb the condensed water generated due to the temperature difference inside and outside the CCD detector 3, so as to avoid the interference of the condensed water on the detection operation of the CCD detector 3.

[0045] Exemplarily, the spectrometer detection device provided by the present invention further includes a transparent sealed box body 8. In this spectrometer detection device, the CCD detector 3, the desiccant, and the cold end of the semiconductor refrigerating sheet 7 are all arranged inside the transparent sealed box body 8; the hot end of the semiconductor refrigerating sheet 7 is arranged outside the transparent sealed box body 8; the desiccant is specifically a silica gel with indicator 9.

[0046] In this embodiment, the combination of the transparent sealed box body 8 and the silica gel with indicator 9 can not only absorb the moisture inside the CCD detector 3 in a timely and effective manner, but also replace the silica gel with indicator 9 in a timely manner according to the color of the silica gel with indicator 9, ensuring the drying ability of the silica gel with indicator 9 for the CCD detector 3, enabling the CCD detector 3 to always operate in a dry environment, and improving the detection accuracy of the CCD detector 3.

[0047] In this embodiment, the combination of the transparent sealed box body 8 and the semiconductor refrigerating sheet 7 can cool the CCD detector 3, enabling the CCD detector 3 to be stably maintained at a relatively low temperature, such as -20 °C, thereby improving the signal-to-noise ratio of the CCD detector 3 and the detection accuracy of the CCD detector 3.

[0048] Among them, the silica gel with indicator 9 as the desiccant can be arranged at the bottom of the transparent sealed box body 8; the semiconductor refrigerating sheet 7 can be arranged in the middle of the transparent sealed box body 8, and the cold end of the semiconductor refrigerating sheet 7 is hermetically fixed inside the transparent sealed box body 8, while the hot end of the semiconductor refrigerating sheet 7 penetrates through the sealed box and is located outside the box.

[0049] In addition, a heat-dissipating water bag can be wrapped around the outside of the hot end of the semiconductor refrigerating sheet 7, and the material of the water bag is a heat-resistant material with strong thermal conductivity.

[0050] In this embodiment, after the scattered light generated by the sample to be measured enters the CCD detector 3, the CCD detector 3 driving circuit connected to the CCD detector 3 controls the CCD detector 3 to detect the intensity of the Raman scattered light in the aforementioned scattered light, converts this optical signal into an analog electrical signal, and then processes the analog electrical signal into a digital signal after filtering, amplification, and conversion, and performs data analysis through the processing chip of the CCD detector 3 to obtain the composition of the sample to be measured.

[0051] The CCD detector 3 can also be connected to a transmission module and a storage module for data transmission and storage. For example, the data and results of the CCD detector 3 are uploaded to the cloud through the Wi-Fi transmission module, facilitating a mobile device such as a mobile phone to obtain the data information in the cloud and view and analyze the data information.

[0052] It can be seen that the above CCD detector 3 is cooled by the semiconductor refrigeration sheet 7 and dried by the discolored silica gel 9, so it can greatly improve the sensitivity of the CCD detector 3 to the Raman scattered light generated by the sample to be measured, and improve the detection accuracy and precision.

[0053] Based on any of the above embodiments, in the spectrometer detection device provided by the present invention, the first optical lens assembly includes a band-pass filter 51, a reflector 52, and a plano-convex lens 53; the surface of the reflector 52 is a total reflection surface.

[0054] The band-pass filter 51 can filter the sideband spectral components or stray light of the laser emitted by the laser 1. For the laser 1 that can emit a laser with a wavelength of 780 nm, the diameter of the band-pass filter 51 can be set to 25 mm, and the center wavelength can be set to 780 nm.

[0055] The reflector 52 is used to change the direction of the laser emitted by the laser 1 towards the band-pass filter 51, so that this laser irradiates the sample to be measured on the sample stage 2. The reflector 52 can be a total reflection flat mirror. The angle of the reflector 52 can be specifically set according to the angle of the sample stage 2 and the angle of the laser irradiated from the laser 1 through the band-pass filter 51 to the reflector 52.

[0056] The plano-convex lens 53 is located between the reflector 52 and the sample stage 2, and the convex surface of the plano-convex lens 53 faces the sample stage 2. The focal length of the plano-convex lens 53 is equal to the distance between the plano-convex lens 53 and the sample stage 2. For example, if the focal length of the plano-convex lens 53 is set to 25 mm, then the distance between the plano-convex lens 53 and the sample stage 2 is 25 mm. The plano-convex lens 53 accumulates the laser emitted by the reflector 52 on the sample stage 2.

[0057] In this embodiment, an anti-reflection film is provided on the surface of the plano-convex lens 53, which can effectively reduce the loss of Raman scattered light caused by reflection on the surface of the plano-convex lens 53.

[0058] It can be seen that the above band-pass filter 51, the reflector 52 and the plano-convex lens 53 form a first optical lens assembly for realizing the transmission of laser between the laser 1 and the sample stage 2. The path of the laser transmission between the first optical lens assemblies can be referred to as the excitation optical path. In this excitation optical path, the band-pass filter is used to filter out the clutter in the laser provided by the laser 1, the reflector 52 is used to change the route of the laser, and the plano-convex lens 53 is used to focus the laser on the sample stage 2 to realize the laser irradiation of the sample to be measured on the sample stage 2, so that the sample to be measured generates scattered rays including Raman scattered light and Rayleigh scattered light.

[0059] The width of the above excitation optical path can be the diameter of the plano-convex lens 53; among them, the diameter of the plano-convex lens 53 can be any value in the range of 0.5 cm to 5 cm.

[0060] On the basis of any of the above embodiments, the second optical lens assembly includes a fiber collimating lens 61, a holographic band-stop filter 62 and a beam splitter 63.

[0061] The fiber collimating lens 61 belongs to a plano lens, and the diameter of the fiber collimating lens 61 can be equal to the diameter of the concave mirror 4. Taking the plano-convex lens 53 of the first optical lens assembly located upstream of the sample stage 2 as an example, the fiber collimating lens 61 is located downstream of the sample stage 2 and within the focal length range of the concave mirror 4, and is used to transmit the scattered rays generated by the sample to be measured to the holographic band-stop filter 62.

[0062] Considering that the Raman scattered light passing through the fiber collimating lens 61 is 10 -3 ~10 -6 times that of the Rayleigh scattered light and is significantly weaker than the Rayleigh scattered light, for this reason, a holographic band-stop filter 62 can be arranged behind the fiber collimating lens 61. The holographic band-stop filter 62 can adopt a filter with a central wavelength close to or even equal to the laser wavelength provided by the laser 1. For example, a filter with a central wavelength of 785 nm can be adopted to avoid the interference of a large amount of Rayleigh scattered light in the excitation optical path on the Raman scattered light and play a role in suppressing the Rayleigh scattered light.

[0063] The beam splitter 63 is located behind the holographic band-stop filter 62 and can be specifically set as an optical cable type beam splitter. The optical cable type beam splitter decomposes the Raman scattered light into light rays of different wavelengths and transmits them into the CCD detector 3. For example, the optical cable type beam splitter can be located at the entrance of the CCD detector 3, and the scattered light passing through the holographic band-stop filter 62 is decomposed by the optical cable type beam splitter and then enters the CCD detector 3.

[0064] It can be seen that the above-mentioned optical fiber collimating lens 61, holographic band-stop filter 62 and beam splitter 63 form a second optical lens assembly, which is used to realize the transmission of the scattered light generated by the sample to be measured between the sample stage 2 and the CCD detector 3. The path of the aforementioned scattered light transmitted between the second optical lens assemblies can be referred to as the scattered light path. In this scattered light path, the holographic band-stop filter 62 is used to filter out the Rayleigh scattered light in the scattered light, and only allows the Raman scattered light to pass through, so as to avoid the interference of the Rayleigh scattered light on the detection operation of the CCD detector 3; the spectroscopic element is used to spectroscopically analyze the Raman scattered light, and divide the Raman scattered light into lights of different wavelengths, which is convenient for the detection operation of the CCD detector 3.

[0065] In addition, the spectrometer detection device may further include a housing disposed outside the laser 1, the sample stage 2, the CCD detector 3, the first optical lens assembly and the second optical lens assembly. The housing includes a head and a handle. The laser 1 is located at the bottom of the handle of the housing, the sample stage 2 is located at the head of the housing, and the first optical lens assembly is located inside the handle. The laser 1, such as a semiconductor laser, generates laser light under the action of a semiconductor laser drive circuit, and this laser light is sequentially transmitted to the first optical lens assembly, the sample stage 2, the second optical lens assembly and the CCD detector 3.

[0066] The spectrometer detection device can be uniformly controlled by the circuit board 10 for the operations of the laser 1, the CCD detector 3 and its refrigeration structure. As Figure 1 shown, the user can send instructions to the circuit board 10 through the mobile terminal and the transmission module, so that the circuit board 10 starts the laser drive circuit of the laser 1 to realize the emission of laser light by the laser 1; makes the circuit board 10 start the CCD detector drive circuit to realize the detection and analysis of the components of the sample to be measured by the CCD detector 3; makes the circuit board 10 start the refrigeration drive circuit to realize the cooling of the CCD detector 3 by the semiconductor refrigeration chip 7. In addition, the circuit board 10 can also be made to start the temperature sensor and temperature compensator of the sample stage 2 to realize the temperature compensation of the sample stage 2.

[0067] In summary, the spectrometer detection device enhances the intensity of the scattered light, especially the intensity of the Raman scattered light, transmitted from the sample to be measured to the second optical lens assembly through the noble metal nano-coating provided on the sample stage 2 and the concave reflector 4 provided on the outer periphery of the bottom of the sample stage 2; uses the holographic band-stop filter 62 in the second optical lens assembly to filter out the Rayleigh scattered light in the aforementioned scattered light, and further combines the low-temperature drying treatment of the CCD detector 3 to improve the detection accuracy and sensitivity of the CCD detector 3.

[0068] The above has introduced in detail the spectrometer detection device provided by the present invention. Specific examples are used in this article to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can still be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A spectrometer detection device, characterized in that, It includes a laser (1), a sample stage (2), a CCD detector (3), and a cooling and drying device disposed adjacent to the CCD detector (3); between the laser (1) and the sample stage (2), there is a first optical lens assembly for transmitting the laser of the laser (1) to the sample to be measured on the sample stage (2); between the sample stage (2) and the CCD detector (3), there is a second optical lens assembly for transmitting the optical signal emitted by the sample to be measured to the CCD detector (3). The surface of the sample stage (2) is provided with a noble metal nano - coating, and the noble metal nano - coating is specifically an Au coating or an Ag coating. On one side of the sample stage (2) away from the first optical lens assembly and the second optical lens assembly, there is a concave mirror (4). The sample stage (2) is provided with a temperature sensor and a temperature compensator.

2. The spectrometer detection device according to claim 1, characterized in that, The laser (1) is specifically a semiconductor laser for providing laser with a wavelength of 780 nm.

3. The spectrometer detection device according to claim 1, wherein The cooling and drying device includes a semiconductor refrigerating sheet (7) and a desiccant.

4. The spectrometer detection device according to claim 3, characterized in that, It further includes a transparent sealed box body (8); the CCD detector, the desiccant, and the cold end of the semiconductor refrigerating sheet (7) are all disposed inside the transparent sealed box body (8), and the hot end of the semiconductor refrigerating sheet (7) is disposed outside the transparent sealed box body (8); the desiccant is specifically a silica gel with color change (9).

5. The spectrometer detection device according to any one of claims 1 to 4, characterized in that, The first optical lens assembly includes a band - pass filter (51), a reflector (52), and a plano - convex lens (53); the surface of the reflector (52) is a total reflection surface; the surface of the plano - convex lens (53) is provided with an antireflection film.

6. The spectrometer detection device according to any one of claims 1 to 4, characterized in that, The second optical lens assembly includes a fiber collimating lens (61), a holographic band - stop filter (62), and a beam splitter (63); the central wavelength of the holographic band - stop filter (62) is equal to the wavelength of the laser provided by the laser (1).

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