WO2022174485A1 - Spectrometer detection device - Google Patents

Abstract

A spectrometer detection device, comprising a laser (1), a sample stage (2), a CCD detector (3), and a cooling dryer. A first optical lens assembly is provided between the laser (1) and the sample stage (2). A second optical lens assembly is arranged between the sample stage (2) and the CCD detector (3). The surface of the sample stage (2) is provided with a noble metal nano coating. One side of the sample stage (2) is provided with a concave mirror (4). When the device is used, the laser light of the laser (1) is irradiated to the sample stage (2) through the first optical lens assembly, so that a sample to be tested on the sample stage (2) generates an optical signal comprising scattered light, and the optical signal is transmitted to the CCD detector (3) through the second optical lens assembly, thereby achieving component detection and analysis of said sample. The noble metal nano coating and the concave mirror (4) improve the light intensity of the scattered light transmitted to the second optical lens assembly, the cooling dryer improves the signal-to-noise ratio of the CCD detector (3), and therefore, the detection precision and sensitivity of the sample to be tested by the spectrometer detection device is improved.

Description

A spectrometer detection device

This application claims the priority of the Chinese patent application filed on February 20, 2021 with the application number 202110192731.0 and the invention titled "A Spectrometer Detection Device", the entire contents of which are incorporated into this application by reference.

technical field

The present application relates to the field of detection, in particular to a spectrometer detection device.

Background technique

Raman spectroscopy refers to the analysis and identification of material types by analyzing the scattering spectrum of incident light irradiated on the material.

Raman detector is a device that uses Raman spectroscopy to analyze the composition and type of substances. When the Raman detector is used to detect the composition and type of the substance, the incident light provided by the Raman detector is used to irradiate the detected substance, so that the detected substance emits scattered light with a frequency different from the incident light. The shift in the Raman spectrum of light to determine the composition and species of the detected substance.

However, since the scattered light emitted by the substance to be detected includes both Raman scattered light and Rayleigh scattered light, and the spectral lines of the aforementioned Raman scattered light are very different from those of the Rayleigh scattered light Therefore, 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

The purpose of the present application is to provide a spectrometer detection device, which can improve detection accuracy and sensitivity.

In order to achieve the above purpose, the present application provides a spectrometer detection device, comprising a laser, a sample stage, a CCD detector and a cooling drier set next to the CCD detector; A first optical lens assembly for transmitting the laser light of the laser to the sample to be tested on the sample stage; between the sample stage and the CCD detector, there is an optical signal used to transmit the sample to be tested a second optical lens assembly delivered to the CCD detector;

The surface of the sample stage is provided with a precious metal nano-coating;

A concave reflective mirror is provided on a side of the sample stage away from the first optical lens assembly and the second optical lens assembly.

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

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

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

Preferably, the cooling dryer includes a semiconductor refrigeration sheet and a desiccant.

Preferably, it also includes a transparent sealed box body; the CCD detector, the desiccant and the cold end of the semiconductor refrigeration sheet are all arranged in the transparent sealed box body, and the hot end of the semiconductor refrigeration sheet is arranged in the The transparent sealing box is outside the body; the desiccant is specifically color-changing silica gel.

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 total reflection surface; and an anti-reflection film is provided on the surface of the plano-convex lens.

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

With respect to the above-mentioned background technology, the spectrometer detection device provided by the present application includes a laser, a CCD detector, a sample stage and a cooling dryer arranged next to the CCD detector; the surface of the sample stage is provided with a precious metal nano-coating, and one side of the sample stage is There is a concave mirror, and the concave mirror is located on the side of the sample stage away from the first optical lens and the second optical lens.

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

When using the spectrometer detection device, the laser light emitted by the laser is sequentially focused to the sample stage through a plurality of mirrors of the first optical lens assembly, and the sample to be tested on the sample stage is illuminated by the laser to generate Raman scattering light and Rayleigh scattering. Light signal inside. The aforementioned optical signal generated by the sample to be tested is processed by the second optical lens assembly and transmitted to the CCD detector, so that the Raman scattered light in the optical signal is analyzed by the CCD detector to analyze the components of the sample to be tested.

It can be seen that, compared with the existing device, the spectrometer detection device utilizes the noble metal nano-coating and concave mirror on the surface of the sample stage to enhance the light intensity of the Raman scattered rays transmitted from the sample stage to the second optical lens assembly, while cooling and drying The detector can improve the detection accuracy of the CCD detector by improving the signal-to-noise ratio of the CCD detector. In conclusion, compared with the prior art, the spectrometer detection device provided by the present application can improve the detection accuracy and sensitivity of the sample to be tested.

Description of drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only It is an embodiment of the present application. For those of ordinary skill in the art, other drawings can also be obtained according to the provided drawings without any creative effort.

1 is a structural block diagram of a spectrometer detection device provided by an embodiment of the application;

FIG. 2 is a schematic structural diagram of a spectrometer detection device provided by an embodiment of the present application.

Among them, 1-laser, 2-sample stage, 3-CCD detector, 4-concave mirror, 51-bandpass filter, 52-reflector, 53-plano-convex lens, 61-fiber collimating lens, 62- Holographic bandstop filter, 63-beamsplitter, 7-semiconductor refrigeration sheet, 8-transparent sealed box, 9-color-changing silica gel, 10-circuit board.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

In order to make those skilled in the art better understand the solution of the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

Please refer to FIGS. 1 and 2. FIG. 1 is a structural block diagram of a spectrometer detection device provided by an embodiment of the present application; and FIG. 2 is a schematic structural diagram of a spectrometer detection device provided by an embodiment of the present application.

The present application provides a spectrometer detection device, including a laser 1, a sample stage 2, a CCD detector 3 and a cooling dryer.

The sample to be tested is placed on the sample stage 2, and the laser 1 is used to emit laser light to the sample to be tested on the sample stage 2, so that the sample to be tested can emit light signals such as scattered light under the laser irradiation; the CCD detector 3 is located on the sample stage 2. One side is used to receive and detect the light signal emitted by the sample to be tested. The cooling dryer is disposed adjacent to the CCD detector 3 for cooling and drying the CCD detector 3 .

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 tested on the sample stage; the second optical lens assembly is used to transmit the light signal emitted by the sample to be tested to the CCD detector 3 .

The first optical lens assembly and the second optical lens assembly can be formed by using optical lenses such as lenses and reflective lenses. As for the specific types and structural parameters of optical lenses such as lenses and reflective lenses, and the relative positional relationship between multiple optical lenses, the setting should be based on The test requirements of the sample to be tested and the structural parameters and relative positional relationship settings of the laser 1 , the sample stage 2 and the CCD detector 3 .

In the spectrometer detection device, the sample stage 2 is a mirror structure. The surface of the sample stage 2 is provided with a noble metal nano-coating, including but not limited to Ag nano-coating. The noble metal nano-coating layer is used to enhance the light signal emitted by the sample to be tested under laser irradiation, especially the Raman scattered light in the light signal. One side of the sample stage 2 is provided with a concave mirror 4 . 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 provided on the side of the sample stage 2 away from the first optical lens assembly and the second optical lens assembly .

For example, the concave mirror 4 can be located on the opposite side of the sample to be tested. For example, if the sample to be tested 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 sample stage 2. The bottom surface or the bottom surface and the peripheral side of the sample stage 2 .

The CCD detector 3 can be connected with a collection circuit for converting the optical signal collected by the CCD detector 3 into an electrical signal, so as to analyze the composition of the sample to be tested according to the electrical signal.

Since the temperature of the CCD detector 3 decreases by 6-7°C, the dark current of the CCD detector 3 will be doubled. When the temperature of the CCD detector 3 drops to -50°C, the dark current noise of the CCD detector 3 can be reduced to 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 application refrigerates and dries the CCD detector 3 through a cooling dryer.

When using the spectrometer detection device provided in this application, the laser light emitted by the laser 1 is sequentially focused to the sample stage 2 through a plurality of mirrors of the first optical lens assembly, and the sample to be tested on the sample stage 2 is pulled under the irradiation of the laser. Light signals such as Mann scattered light and Rayleigh scattered light, the light signal generated by the sample to be tested is processed by the second optical lens assembly and transmitted to the CCD detector 3, and then the Raman in the light signal is analyzed by the CCD detector 3. Scatters light to analyze the composition of the sample to be tested.

For the spectrometer detection device provided in this application, the noble metal nano-coating on the surface of the sample stage 2 enhances the light intensity of the Raman scattered rays transmitted by the sample stage 2 to the second optical lens assembly; the concave mirror 4 can gather the sample to be tested The Raman scattered light and Rayleigh scattered light generated under the laser and scattered around are reflected into the scattered light path where the second optical lens is located to further enhance the intensity of the Raman scattered light; the cooling dryer can reduce the CCD detector by lowering the intensity of the Raman scattered light. 3 ways to improve the signal-to-noise ratio of the CCD detector 3. In summary, the precious metal nano-coating, the concave mirror 4 and the cooling dryer can gradually improve the detection quality of the Raman scattered light generated by the CCD detector 3 during the light transmission process of the spectrometer detection device. The detection precision and sensitivity of the sample to be tested by the spectrometer detection device are improved.

The spectrometer detection device provided by the present application will be further described below with reference to the accompanying drawings and embodiments.

On the basis of the above embodiment, in the spectrometer detection device provided by the present application, the sample stage 2 is provided with a temperature sensor for monitoring the temperature of the sample stage 2 in real time and a temperature compensator for adjusting the temperature of the sample stage 2 .

The temperature compensator can be a device with a temperature adjustment function in the prior art, can be a device with both heating and cooling functions, or can be specifically set as a heating device according to the temperature change trend of the sample stage 2 during actual use or refrigeration unit. The spectrometer detection device adjusts the temperature of the sample stage 2 and the sample to be tested in real time through a temperature sensor and a temperature compensator, so as to ensure the detection accuracy of the spectrometer detection device of the sample to be tested.

As for the noble metal nano-coating on the surface of the sample stage 2, it can be specifically set as Au coating or Ag coating. The Au coating layer or the Ag coating layer can be disposed on the surface of the sample stage 2 by means of evaporation, so as to enhance the Raman scattered light generated by the sample to be tested under laser irradiation.

The laser 1 used in the present application can be specifically configured as a semiconductor laser for providing laser light with a wavelength of 780 nm. Therefore, the wavelength of the laser light emitted by the semiconductor laser is 785nm. After the laser light irradiates the sample to be tested, the wavelength of the Raman scattered light generated by the sample to be tested is 160-3150 nm. The Raman scattered light in this range is beneficial to the second optical lens assembly. The transfer and detection of the CCD detector 3.

In addition, the semiconductor laser can be driven by a constant current power supply, so that the semiconductor laser can generate laser light with stable light intensity.

For the cooling dryer used in the present application, the semiconductor refrigeration sheet 7 and a desiccant may be included.

The semiconductor refrigeration sheet 7 is used to cool the CCD detector 3 ; the desiccant is used to absorb the condensed water produced by the temperature difference between the inside and outside of the CCD detector 3 , so as to prevent the condensed water from interfering with the detection operation of the CCD detector 3 .

Exemplarily, the spectrometer detection device provided in this application further includes a transparent sealed box 8 . In the spectrometer detection device, the CCD detector 3, the desiccant and the cold end of the semiconductor refrigeration sheet 7 are all arranged in the transparent sealing box 8; the hot end of the semiconductor refrigeration sheet 7 is arranged outside the transparent sealing box 8; the desiccant Specifically, it is color-changing silica gel 9.

In this embodiment, the transparent sealing box 8 combined with the color-changing silica gel 9 can not only absorb the moisture in the CCD detector 3 in a timely and effective manner, but also replace the color-changing silica gel 9 according to the color of the color-changing silica gel 9 in time, so as to ensure that the color-changing silica gel 9 can detect the CCD. The drying ability of the CCD detector 3 is improved, so that the CCD detector 3 can always operate in a dry environment, and the detection accuracy of the CCD detector 3 is improved.

In this embodiment, the transparent sealed box body 8 combined with the semiconductor refrigeration sheet 7 can cool the CCD detector 3 , so that the CCD detector 3 can be stably maintained at a lower temperature such as -20° C., thereby improving the signal-to-noise of the CCD detector 3 ratio, improve the detection accuracy of the CCD detector 3,

Among them, the color-changing silica gel 9 as a desiccant can be arranged at the bottom of the transparent sealed box body 8; the semiconductor refrigeration sheet 7 can be arranged in the middle of the transparent sealed box body 8, and the cold end of the semiconductor refrigeration sheet 7 can be sealed and fixed to the transparent sealed box body 8, while the hot end of the semiconductor refrigeration sheet 7 passes through the closed box and is located outside the box.

In addition, the outside of the hot end of the semiconductor refrigeration sheet 7 can be wrapped with a water bag for heat dissipation, and the material of the water bag is a heat-resistant material with strong thermal conductivity.

In this embodiment, after the scattered light generated by the sample to be tested enters the CCD detector 3, the driving circuit of the CCD detector 3 connected to the CCD detector 3 controls the CCD detector 3 to detect the light intensity of the Raman scattered light in the scattered light. , and convert this optical signal into an analog electrical signal, and then filter, amplify and convert the analog electrical signal into a digital signal, and conduct data analysis by the processing chip of the CCD detector 3 to obtain the composition of the sample to be tested.

The CCD detector 3 can also be connected to a transmission module and a storage module for realizing data transmission and storage. For example, the data of the CCD detector 3 and its results are uploaded to the cloud through the Wi-Fi transmission module, so that the mobile terminal such as a mobile phone can obtain the data information in the cloud and view and analyze the data information.

It can be seen that the above-mentioned CCD detector 3 cools the CCD detector 3 through the semiconductor refrigeration sheet 7, and dries the CCD detector 3 through the color-changing silica gel 9, so the Raman scattering generated by the sample to be tested by the CCD detector 3 can be greatly improved Light sensitivity to improve detection precision and accuracy.

On the basis of any of the above embodiments, in the spectrometer detection device provided by the present application, 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 bandpass filter 51 can filter sideband spectral components or stray light of the laser light emitted by the laser 1 . For the laser 1 capable of emitting laser light with a wavelength of 780 nm, the diameter of the bandpass filter 51 can be set to 25 mm, and the center wavelength can be set to 780 nm.

The reflector 52 is used to change the direction of the laser light emitted by the laser 1 to the bandpass filter 51 , so that the laser light can be irradiated on the sample to be tested on the sample stage 2 . The reflection mirror 52 can be a flat mirror with total reflection. The angle of the reflection mirror 52 can be specifically set according to the angle of the sample stage 2 and the angle of the laser beam irradiated by the laser 1 to the reflection mirror 52 through the bandpass filter 51 .

The plano-convex lens 53 is located between the mirror 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 . The plano-convex lens 53 accumulates the laser light emitted via the mirror 52 on the sample stage 2 .

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

It can be seen that the above-mentioned bandpass filter 51 , reflecting mirror 52 and plano-convex lens 53 form a first optical lens assembly, which is used to realize the transmission of laser light between the laser 1 and the sample stage 2 . The path of the laser light passing between the first optical lens assemblies may be referred to as the excitation light path. In this excitation light path, the bandpass filter is used to filter out the clutter in the laser light provided by the laser 1, the mirror 52 is used to change the route of the laser light, and the plano-convex lens 53 is used to focus the laser light on the sample stage 2 to realize the laser light The sample to be tested on the sample stage 2 is irradiated, so that the sample to be tested generates scattered rays including Raman scattered light and Rayleigh scattered light.

The width of the excitation light path can be the diameter of the plano-convex lens 53 , wherein the diameter of the plano-convex lens 53 is any value in the range of 0.5 cm to 5 cm.

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 .

The fiber collimating lens 61 is a flat lens, and the diameter of the fiber collimating lens 61 can be equal to that 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 of the concave mirror 4, and is used to disperse the scattering generated by the sample to be tested. The lines pass to the holographic bandstop filter 62 .

Considering that the Raman scattered light passing through the fiber collimating lens 61 is 10-3 to 10-6 times that of the Rayleigh scattering line, which is obviously weaker than the Rayleigh scattering light, for this reason, a holographic band-stop filter can be set behind the fiber collimating lens 61 Light sheet 62. The holographic band-stop filter 62 can use a filter with a center wavelength close to or even equal to the laser wavelength provided by the laser 1, for example, a filter with a center wavelength of 785 nm, to avoid the Raman scattered light caused by a large amount of Rayleigh scattered light in the excitation light path. Interference, play a role in inhibiting Rayleigh scattered light.

The beam splitter 63 is located behind the holographic band-stop filter 62, and can be specifically configured as a cable-type beam splitter. The fiber optic beam splitter decomposes the Raman scattered light into light rays of different wavelengths and transmits them to the CCD detector 3 . For example, a cable-type beam splitter may 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 cable-type beam splitter and then enters the CCD detector 3 .

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 scattered light generated by the sample to be tested between the sample stage 2 and the CCD detector 3. transfer. The path through which the aforementioned scattered light is transmitted between the second optical lens components may be referred to as a scattered light path. In this scattered light path, the holographic band-stop filter 62 is used to filter the Rayleigh scattering line in the scattered light, and only allows the Raman scattered light to pass through, so as to prevent the Rayleigh scattered light from interfering with the detection operation of the CCD detector 3; the spectroscopic element is used for The Raman scattered light is split, and the Raman scattered light is divided into lights of different wavelengths, which facilitates the detection operation of the CCD detector 3 .

In addition, the spectrometer detection device may further include a casing disposed on the periphery of 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 aforementioned housing, the sample stage 2 is located at the head of the aforementioned housing, and the first optical lens assembly is located in the handle. A laser 1 such as a semiconductor laser generates laser light under the action of a semiconductor laser driving circuit, and the 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 .

In the spectrometer detection device, the operation of the laser 1 , the CCD detector 3 and its refrigeration structure can be controlled by the circuit board 10 in a unified manner. As shown in FIG. 1, the user can use the mobile terminal and the transmission module to send an instruction to the circuit board 10 to make the circuit board 10 start the laser driving circuit of the laser 1, so that the laser 1 can emit laser light; make the circuit board 10 start the CCD detector driving circuit , to realize the CCD detector 3 to detect and analyze the composition of the sample to be tested; to make the circuit board 10 start the refrigeration drive circuit to realize the cooling of the CCD detector 3 by the semiconductor refrigeration sheet 7 . In addition, the circuit board 10 can also be made to activate the temperature sensor and the temperature compensator of the sample stage 2 to realize the temperature compensation of the sample stage 2 .

To sum up, the spectrometer detection device enhances the intensity of the scattered light transmitted by the sample to be tested to the second optical lens assembly through the noble metal nano-coating provided on the sample stage 2 and the concave mirror 4 provided on the outer periphery of the bottom of the sample stage 2. The intensity of the Mann scattered light; the holographic band-stop filter 62 in the second optical lens assembly is used to filter out the Rayleigh scattered light in the scattered light, and the detection of the CCD detector 3 is further improved by combining with the low-temperature drying treatment of the CCD detector 3 Accuracy and Sensitivity.

The spectrometer detection device provided by the present application has been introduced in detail above. Specific examples are used herein to illustrate the principles and implementations of the present application, and the descriptions of the above embodiments are only used to help understand the methods and core ideas of the present application. It should be pointed out that for those of ordinary skill in the art, without departing from the principles of the present application, several improvements and modifications can also be made to the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims (8)

A spectrometer detection device, characterized in that it comprises a laser (1), a sample stage (2), a CCD detector (3), and a cooling drier provided next to the CCD detector (3); the laser (1) A first optical lens assembly for transmitting the laser light of the laser (1) to the sample to be tested on the sample stage (2) is arranged between the sample stage (2) and the sample stage (2). 2) and the CCD detector (3) is provided with a second optical lens assembly for transmitting the light signal emitted by the sample to be tested to the CCD detector (3); The surface of the sample stage (2) is provided with a noble metal nano-coating; A concave reflective mirror (4) is provided on the side of the sample stage (2) away from the first optical lens assembly and the second optical lens assembly. The spectrometer detection device according to claim 1, characterized in that, the sample stage (2) is provided with a temperature sensor and a temperature compensator. The spectrometer detection device according to claim 1, wherein the noble metal nano-coating is specifically an Au coating or an Ag coating. The spectrometer detection device according to claim 1, wherein the laser (1) is specifically a semiconductor laser for providing laser light with a wavelength of 780 nm. The spectrometer detection device according to claim 1, characterized in that, the cooling dryer comprises a semiconductor refrigeration sheet (7) and a desiccant. The spectrometer detection device according to claim 5, characterized in that it further comprises a transparent sealed box body (8); the cold ends of the CCD detector, the desiccant and the semiconductor refrigeration sheet (7) are all arranged in the Inside the transparent sealing box body (8), the hot end of the semiconductor refrigeration sheet (7) is arranged outside the transparent sealing box body (8); the desiccant is specifically color-changing silica gel (9). The spectrometer detection device according to any one of claims 1 to 6, characterized in that, the first optical lens assembly comprises a band-pass filter (51), a reflector (52) and a plano-convex lens (53); the The surface of the reflector (52) is a total reflection surface; the surface of the plano-convex lens (53) is provided with an anti-reflection film. The spectrometer detection device according to any one of claims 1 to 6, wherein the second optical lens assembly comprises a fiber collimating lens (61), a holographic band-stop filter (62) and a beam splitter (63) ); the center wavelength of the holographic band-stop filter (62) is equal to the wavelength of the laser light provided by the laser (1).

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