A Raman spectrum detection probe and a Raman spectrum detection device

Abstract

The present application discloses a Raman spectrum detection probe and a Raman spectrum detection device, which relate to the field of optical engineering technology. The probe can detect in parallel with multiple channels, and is easy to be densely arranged and assembled. The optical path calibration is simple and easy to operate. The Raman spectrum detection probe includes a support, an incident component, a dimming component and a collecting component. A dichroic mirror is arranged in the support, and an incident part, a dimming part and a collecting part are arranged on the support; the incident component is detachably connected to the incident part, including an incident tube; the dimming component is detachably connected to the dimming part, including a dimming tube; the collecting component is detachably connected to the collecting part, including a collecting tube; the incident component is located on one side of the light-transmitting surface of the dichroic mirror, and the dimming component and the collecting component are located on one side of the light-reflecting surface of the dichroic mirror; the light of the incident tube passes through the light-transmitting surface of the dichroic mirror to point to the dimming component, and passes through the dimming component to converge on the sample to excite the signal; the signal light of the sample to be tested passes through the dimming component for collimation, and is reflected to the collecting tube through the light-reflecting surface of the dichroic mirror.

Description

Technical Field

[0001] The present application relates to the field of optical engineering technology, and in particular to a Raman spectrum detection probe and a Raman spectrum detection device. Background Art

[0002] When a substance is excited by laser, the vibration of molecular bonds causes inelastic scattering signals called Raman spectroscopy. Raman spectroscopy can provide information on the structure and chemical bonds of molecules and is widely used in detection in the fields of chemistry, materials science, biomedicine, environmental science, etc.

[0003] The spectral detection equipment in related technologies is mostly single-channel single-point detection. If multi-channel detection is to be performed, multiple single-channel probe units are generally spliced ​​together. The optical path groups between such probe units are relatively independent, and the size of the structure after splicing is large. Its miniaturization requires proportional reduction of all optical elements in the probe unit, such as lenses and dichroic mirrors. In addition to being limited by the size of the optical elements, its assembly and calibration are also very difficult. Summary of the invention

[0004] The present application provides a Raman spectrum detection probe and a Raman spectrum detection device, which can detect in parallel with multiple channels, can achieve miniaturization limited only by the size of the lens and arbitrary expansion of the number of channels, and has a compact optical path, and is simple and easy to operate in assembly and optical path calibration.

[0005] The first aspect of the present application provides a Raman spectrum detection probe, including a support, an incident component, a dimming component and a collecting component, wherein a dichroic mirror is arranged in the support, the dichroic mirror has a relative light-transmitting surface and a light-reflecting surface, and an incident portion, a dimming portion and a collecting portion are arranged on the support; the incident component is detachably connected to the incident portion, the incident component includes at least two groups of incident tubes, the far end of the incident tube is used to connect to a laser, and the near end points to the dichroic mirror, which is used to expand and collimate the incident light and point it to the dichroic mirror; the dimming component is detachably connected to the dimming portion, including at least two groups of dimming tubes, which are used to focus the light passing through it. The collecting assembly is detachably connected to the collecting part, and the collecting assembly includes at least two groups of collecting tubes, which are used to focus and couple the collected optical signals into the optical fiber for transmission to the detector; the incident assembly is located on one side of the light-transmitting surface of the dichroic mirror, and the dimming assembly and the collecting assembly are located on one side of the light-reflecting surface of the dichroic mirror; the light from the incident tube passes through the light-transmitting surface of the dichroic mirror to point to the dimming assembly, and passes through the dimming assembly; when the light passing through the dimming assembly converges on the sample to be tested to excite the signal light, the signal light of the sample to be tested passes through the dimming assembly for collimation, and is reflected to the collecting tube through the reflective surface of the dichroic mirror.

[0006] The Raman spectrum detection probe provided by the present application has an incident part, a dimming part and a collecting part on the support. When spectrum detection is required, the incident component can be installed on the incident part of the support, the collecting component can be installed on the collecting part of the support, and the dimming component can be installed on the dimming part of the support to complete the assembly of the Raman spectrum detection probe. The dichroic mirror in the support can allow light to pass through one side of the light-transmitting surface, and the light directed to the side of the reflective surface will be reflected, that is, the incident component is located on one side of the light-transmitting surface of the dichroic mirror, and the dimming component and the collecting component are located on one side of the reflective surface of the dichroic mirror; in this way, the incident tube is connected to the laser and the incident light is expanded and collimated, and then the light passes through the light-transmitting surface of the dichroic mirror and points to the dimming component. The dimming component focuses the incident light on the sample to be tested below it to excite the signal light, and the signal light passes through the dimming component again and is expanded and collimated, and reaches the bottom of the dichroic mirror and is reflected to the collecting tube by the reflective surface of the dichroic mirror, realizing the excitation and collection of spectrum detection. Compared with the related art, since the incident component, dimming component and collecting component are detachably connected to the incident part and the collecting part respectively, they can be easily disassembled and assembled; and when calibration is required, the incident component, dimming component and collecting component can be easily disassembled or displaced relative to the support, and the calibration operation is very simple. At the same time, it also provides more possibilities for the expansion and setting of the incident component and the collecting component itself. For example, at least two groups of incident tubes can be set on the incident component, and at least two groups of collecting tubes can be set on the collecting component to assemble into a multi-channel spectral detection system.

[0007] Therefore, the Raman spectrum detection probe provided in the present application can perform multi-channel parallel detection, and can achieve miniaturization limited only by the size of the lens and arbitrary expansion of the number of channels, and the assembly and optical path calibration are simple and easy to operate.

[0008] In a possible implementation of the present application, the incident portion, the dimming portion and the collecting portion are all groove structures, and the incident component, the dimming component and the collecting component are matched block structures.

[0009] In a possible implementation of the present application, at least one side of the groove structure passes through the support, and the block structure can slide into the groove structure along the side of the groove structure passing through the support, and the block structure and the groove structure are positioned and fixed by fasteners.

[0010] In a possible implementation of the present application, the block structure includes a base and a boss formed on one side of the base, the boss can slide into the groove structure accordingly, and the base abuts against the support.

[0011] In a possible implementation of the present application, the shapes and sizes of the groove structures of the incident part and the collecting part on the support are consistent, the shapes and sizes of the incident component and the collecting component are consistent, and the block structure is compatible with the groove structure.

[0012] In a possible implementation of the present application, the incident component also includes an incident block, the incident block is provided with at least two incident holes, and the incident tubes are arranged in the incident holes in a one-to-one manner; the dimming component also includes a mounting plate, the mounting plate is provided with at least two dimming holes, and the dimming tubes are arranged in the dimming holes in a one-to-one manner; the collecting component also includes a collecting block, the collecting block is provided with at least two collecting holes, and the collecting tubes are arranged in the collecting holes in a one-to-one manner; the number of incident tubes, dimming tubes and collecting tubes is the same, the outgoing light of the incident tube passes through the dimming tube and excites the sample to be tested, and the excited signal light passes through the dimming tube again and is collected by the collecting tube in a one-to-one manner.

[0013] In a possible implementation of the present application, the incident tube array is arranged on the incident block, the dimming tube array is arranged on the mounting plate, and the collecting tube array is arranged on the collecting block.

[0014] In a possible implementation of the present application, the incident tube and the collecting tube both include a sleeve and a lens component, the lens components of the incident tube and the collecting tube are arranged in the sleeve, the dimming tube includes a lens component arranged inside it, the lens component of the incident tube is used to collimate the divergent incident light, the lens component of the dimming tube is used to focus the parallel incident light, and collimate the divergent signal light, and the lens component of the collecting tube is used to focus the parallel signal light; the incident tube and the collecting tube also include optical fibers, which are connected to the side of the lens component away from the dichroic mirror.

[0015] In a possible implementation of the present application, the lens component is a gradient refractive index lens or a gradient refractive index optical fiber, which is a cylindrical structure and is adapted inside the sleeve. The refractive index distribution of the internal material of the lens component gradually decreases from the center to the edge along the radial direction.

[0016] In a possible implementation of the present application, the lens element includes a convex lens element, and the convex lens element and the sleeve are coaxially arranged and fixed in the sleeve.

[0017] In a possible implementation of the present application, the lens component is a lens group with a convergence or collimation function consisting of at least one concave lens and at least one convex lens. The lens group and the sleeve are coaxially arranged and fixed in the sleeve.

[0018] In a possible implementation of the present application, the lens component is a meta-lens, including a light-transmitting substrate and a microstructure texture area formed on at least one surface of the light-transmitting substrate. The lens component and the sleeve are coaxially arranged and fixed in the sleeve.

[0019] In a possible implementation of the present application, the light-transmitting substrate is a flat plate structure, and the microstructure texture area is arranged on any side of the light-transmitting substrate facing the dichroic mirror.

[0020] In a possible implementation of the present application, the light-transmitting substrate is a convex lens structure having a flat side and a convex side, or the light-transmitting substrate is a concave lens structure having a flat side and a concave side, and the microstructure texture area is arranged on any side of the light-transmitting substrate.

[0021] In a possible implementation of the present application, the support is a cubic structure surrounded by a plurality of plate-like structures, a light-transmitting area is formed inside, the incident component and the dimming component are respectively located on two opposite side walls of the support, the dichroic mirror is located in the light-transmitting area, the light of the incident component is directed toward the dimming component along a first direction, the dichroic mirror is located on the light path from the incident component toward the dimming component, and the dichroic mirror has an angle with the first direction and is non-vertically arranged, the collecting light path of the collecting component is a second direction, and the second direction has an angle with the first direction.

[0022] In a possible implementation of the present application, the first direction is perpendicular to the second direction, the angles between the dichroic mirror and the first direction and the second direction are the same, and the signal light generated by the sample to be tested passes through the dimming component and then is emitted toward the dichroic mirror in the opposite direction of the first direction, and is reflected to the collecting component along the second direction.

[0023] In a possible implementation of the present application, the incident component is disposed on the top wall of the support, the collecting component is disposed on the side wall of the support, there is one dichroic mirror, and it is inclined at a first angle relative to a horizontal plane, wherein the first angle is an acute angle.

[0024] In a possible implementation of the present application, there are two sets of collecting components, which are respectively located on two opposite side walls of the support, and there are two dichroic mirrors. The upper ends of the two dichroic mirrors are respectively inclined toward the two collecting components to reflect the signal light passing through the dimming component to the two collecting components respectively.

[0025] In a possible implementation of the present application, the bottom ends of the two dichroic mirrors are abutted together, or there is a spacing area between the lower ends of the two dichroic mirrors, and the support is provided with an isolation protrusion in the corresponding spacing area, and the isolation protrusion separates the lower ends of the two dichroic mirrors.

[0026] In a possible implementation of the present application, the support includes an upper seat and a lower base, which are buckled together to form the support, and an avoidance groove is formed at the connection between the upper seat and the lower base, and the avoidance groove is adapted to the edge shape of the dichroic mirror, and the dichroic mirror is limited in the avoidance groove.

[0027] In a possible implementation of the present application, the surface where the upper seat and the lower base meet is adapted to the setting direction of the dichroic mirror, and the avoidance groove is provided on the lower base.

[0028] In a possible implementation of the present application, the incident component also includes a first filtering structure, and the collecting component also includes a second filtering structure. The first filtering structure is arranged on the optical path between the inside of the incident component and the dichroic mirror, and the second filtering structure is arranged on the optical path between the dichroic mirror and the inside of the collecting component.

[0029] In a possible implementation of the present application, the first filtering structure is a first filter, the second filtering structure is a second filter, the first filter is arranged at one end of the incident tube facing the dichroic mirror, and the second filter is arranged at one end of the collecting tube facing the dichroic mirror; or, the first filtering structure and the second filtering structure are both filtering coatings, and the filtering coatings are arranged in the incident tube and the collecting tube, or between the laser and the incident tube, and between the collecting tube and the detector.

[0030] The second aspect of the present application provides a Raman spectrum detection device, comprising a laser, a detector, the Raman spectrum detection probe of the first aspect, a sample carrier, and a controller. The incident tube of the Raman spectrum detection probe is connected to the laser, and the collection tube is connected to the detector; the sample carrier is arranged under the dimming component of the Raman spectrum detection probe, and is used to place the sample to be tested; the controller is connected to the laser and the detector, and is used to control the laser and the detector and process the information detected by the detector.

[0031] The Raman spectrum detection device provided by the present application, the controller controls the laser to emit laser light and the detector to perform corresponding detection, the laser light emitted by the laser enters the incident tube of the Raman spectrum detection probe, and then is shot into the sample to be tested on the sample carrier, the light signal after exciting the sample to be tested returns to the Raman spectrum detection probe again, is collected by the collection tube, and then transmitted to the detector, the detector accepts the control of the controller and feeds back the detected data parameters to the controller, completes the calculation and processing and other operations, and finally realizes the entire spectrum detection process. Since the Raman spectrum detection device provided by the present application includes the Raman spectrum detection probe provided by the first aspect, it has the same technical effect, that is, it can detect in parallel with multiple channels, and the optical path is compact, and the assembly and optical path calibration are simple and easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. The drawings are only used to illustrate the preferred implementation methods and are not considered to be limitations of the present application. In addition, the same reference numerals are used to represent the same components in all the drawings. In the drawings:

[0033] Figure 1 A schematic diagram of a Raman spectroscopy detection device provided for this application;

[0034] Figure 2A schematic diagram of the front structure of the Raman spectroscopy detection probe provided in this application;

[0035] Figure 3 A schematic diagram of the exploded structure of the front side of the Raman spectroscopy detection probe provided in this application;

[0036] Figure 4 A schematic diagram of the three-dimensional structure of the Raman spectroscopy detection probe provided in this application;

[0037] Figure 5 A schematic diagram of the three-dimensional decomposition structure of the Raman spectroscopy detection probe provided in this application;

[0038] Figure 6 One of the optical path schematic diagrams of the Raman spectroscopy detection probe provided in this application;

[0039] Figure 7 The second optical path schematic diagram of the Raman spectroscopy detection probe provided in this application;

[0040] Figure 8 A schematic diagram of the structure of two dichroic mirrors of the Raman spectroscopy detection probe provided in the present application placed opposite to each other;

[0041] Fig. 9 A schematic diagram of the structure of the two dichroic mirrors of the Raman spectroscopy detection probe provided in the present application placed adjacent to each other;

[0042] Fig.10 One of the structural schematic diagrams of the sleeve and lens component of the Raman spectrum detection probe provided in this application with optical fiber;

[0043] Fig.11 The second structural schematic diagram of the sleeve and lens component of the Raman spectrum detection probe provided in this application with an optical fiber;

[0044] Fig.12 The third structural diagram of the sleeve and lens component of the Raman spectrum detection probe provided in this application with an optical fiber;

[0045] Fig.13 The fourth structural schematic diagram of the sleeve and lens component of the Raman spectrum detection probe provided in this application with an optical fiber;

[0046] Fig.14 One of the structural schematic diagrams of the sleeve and lens component of the Raman spectroscopy detection probe provided in this application;

[0047] Fig.15 The second structural schematic diagram of the sleeve and lens component of the Raman spectroscopy detection probe provided in this application;

[0048] Fig.16 The third structural schematic diagram of the sleeve and lens component of the Raman spectroscopy detection probe provided in this application;

[0049] Fig.17 This is the fourth structural schematic diagram of the sleeve and lens component of the Raman spectroscopy detection probe provided in this application.

[0050] Description of reference numerals:

[0051] 1-laser; 2-detector; 21-spectrometer; 22-photoelectric detector; 3-Raman spectrum detection probe; 31-support; 311-incident part; 312-dimming part; 313-collection part; 314-light-transmitting area; 315-upper seat; 316-lower base; 317-avoidance groove; 32-incident component; 321-incident tube; 322-incident block; 323-incident hole; 324-first filter structure Structure; 33-dimming component; 331-mounting plate; 332-dimming hole; 34-collecting component; 341-collecting tube; 342-collecting block; 343-collecting hole; 344-second filtering structure; 35-dichroic mirror; 36-sleeve; 37-lens piece; 371-transparent substrate; 372-microstructure texture area; 4-controller; 5-one-point multi-excitation unit; 6-signal light collection unit; 7-sample carrier. DETAILED DESCRIPTION

[0052] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0053] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions.

[0054] In the description of the embodiments of the present application, the technical terms "first", "second", "third", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0055] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0056] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0057] In the description of the embodiments of the present application, the orientation or position relationship indicated by technical terms such as "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", and "circumferential" are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be understood as limitations on the embodiments of the present application.

[0058] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like 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 an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0059] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical term "contact" should be understood in a broad sense, and may be direct contact or contact through an intermediate medium layer. It may be contact with essentially no interaction force between the two contacting parties, or it may be contact with interaction force between the two contacting parties.

[0060] Current spectral detection equipment mainly uses laser to irradiate the sample to be tested. After the sample to be tested is excited by the laser, the molecules and the electron clouds and molecular bonds in the molecules interact with each other, and the Raman effect occurs. Photons excite the molecules from the ground state to a virtual energy state. The inelastic scattering signal caused by the vibration of molecular bonds can be used to measure and reflect a lot of information about the sample to be tested, such as the molecular structure and chemical bond information.

[0061] The present application provides a Raman spectrum detection device, referring to Figure 1 , including a laser 1, a detector 2, a Raman spectrum detection probe 3 and a sample carrier 7. The laser 1 emits a laser, and the laser enters the Raman spectrum detection probe 3. After being processed by beam expansion, collimation, filtering and focusing in the Raman spectrum detection probe 3, the laser is emitted to the sample carrier 7 on which the sample to be tested is placed. The sample to be tested is excited to produce a Raman effect and generate an excited light signal. The excited light signal is again processed by collimation, reflection and focusing in the Raman spectrum detection probe 3, and then transmitted to the detector 2. The detector 2 detects or analyzes the signal, and the information of the sample to be tested can be obtained later.

[0062] Among them, the laser 1 is a device for emitting light for excitation. The detector 2 may include a spectrometer 21 and a photodetector 22. The Raman signal is first processed by the spectrometer 21 and then enters the photodetector 22 for distinguishing and detecting. Specifically, for example, the spectrometer 21 can be used to separate signal lights of different wavelengths in space or time, so that signal lights of different wavelengths have spatial or temporal resolution when reaching the photodetector 22 array, which is convenient for detection by the photodetector 22. The photodetector 22 is a signal light intensity detection array, which may be a charge-coupled device (CCD), an electron multiplying charge-coupled device (EMCCD), a complementary metal oxide semiconductor (CMOS), an avalanche photodiode (APD) array, a detector (PD) array, etc.

[0063] In some embodiments, to facilitate control, analysis or storage, etc., reference Figure 1 The Raman spectrum detection device also includes a controller 4, which is connected to the laser 1 and the detector 2. The controller 4 is used to control the laser 1 and the detector 2 and process the information detected by the detector 2. Specifically, the controller 4 can control the opening and closing of the laser 1, the parameters of the laser emitted by the laser 1, etc.; the controller 4 can also control the grating switching in the spectrometer 21 in the detector 2 and the opening and closing of the photodetector 22; the controller 4 can also obtain the information detected by the detector 2, and perform operations such as calculation, processing, and storage. The controller 4 can be a known intelligent device that can realize the above functions, such as a desktop computer, a notebook, a single-chip microcomputer, etc.

[0064] In some embodiments, in order to perform multi-channel spectral parallel detection, the Raman spectral detection device provided by the present application is configured such that the Raman spectral detection probe 3 is internally configured to receive excitation light from multiple channels, and the signal light after the sample to be tested is excited can also be collected and transmitted by multiple channels.

[0065] On this basis, refer to Figure 1 The Raman spectrum detection device provided in the present application also includes a one-to-many excitation unit 5 and a signal light collection unit 6. The one-to-many excitation unit 5 is arranged between the laser 1 and the Raman spectrum detection probe 3, and is used to divide one laser signal into multiple laser signals and transmit them to the Raman spectrum detection probe 3. For example, the one-to-many excitation unit 5 can be a fiber optic beam splitter, which can transmit the output light of the laser 1 from one optical fiber and split it into multiple excitation light transmission optical fibers, and transmit them to multiple optical channels corresponding to the Raman spectrum detection probe 3 respectively.

[0066] The signal light collecting unit 6 is arranged between the Raman spectrum detection probe 3 and the detector 2. The signal light collecting unit 6 transmits the multi-channel signal light excited by the sample to be tested in the Raman spectrum detection probe 3 in parallel to the entrance of the detector 2, and aligns them with the corresponding analysis channels respectively to perform corresponding analysis detection, etc.

[0067] In order to facilitate the compactness and miniaturization of the optical path of the device during multi-channel detection and reduce the difficulty of calibration, the Raman spectrum detection device of the embodiment of the present application has designed and modified the structure of the Raman spectrum detection probe 3, so that multi-channel parallel detection can be performed, the optical path is compact, and the assembly and optical path calibration are simple and easy to operate.

[0068] Specifically, the embodiment of the present application also provides a Raman spectrum detection probe 3, referring to Figure 2 , Figure 3 , Figure 4 and Figure 5The Raman spectrum detection probe 3 includes a support 31, an incident component 32, a dimming component 33 and a collecting component 34, wherein a dichroic mirror 35 is arranged in the support 31, and the dichroic mirror 35 has a relative light-transmitting surface and a light-reflecting surface, and an incident portion 311, a dimming portion 312 and a collecting portion 313 are arranged on the support 31; the incident component 32 is detachably connected to the incident portion 311, and the incident component 32 includes at least two groups of incident tubes 321, and the far end of the incident tube 321 is used to connect to the laser 1, and the near end points to the dichroic mirror 35; the dimming component 33 is detachably connected to the dimming portion 312, and includes at least two groups of dimming tubes (not shown in the figure), and the dimming tubes are used to focus or collimate the light passing through them ; The collecting component 34 is detachably connected to the collecting part 313, and the collecting component 34 includes at least two groups of collecting tubes 341, and the collecting tubes 341 are used to transmit the collected light signals to the detector 2; the incident component 32 is located on one side of the light-transmitting surface of the dichroic mirror 35, and the dimming component 33 and the collecting component 34 are located on one side of the light-reflecting surface of the dichroic mirror 35; the light of the incident tube 321 passes through the light-transmitting surface of the dichroic mirror 35 and points to the dimming component 33, and passes through the dimming component; when the light passing through the dimming component 33 converges on the sample to be tested to excite the signal light, the signal light of the sample to be tested is collimated through the dimming component 33, and then reflected to the collecting tube 341 by the reflective surface of the dichroic mirror 35.

[0069] The Raman spectrum detection probe 3 provided in the present application has an incident part 311, a dimming part 312 and a collecting part 313 on a support 31, which correspond to the incident component 32, the dimming component 33 and the collecting component 34 respectively. When spectrum detection is required, the incident component 32 can be installed on the incident part 311 of the support 31, the collecting component 34 can be installed on the collecting part 313 of the support 31, and the dimming component 33 with the sample to be tested placed below can be installed on the dimming part 312 of the support 31 to complete the assembly of the Raman spectrum detection probe 3.

[0070] The dichroic mirror 35 arranged in the support 31 can allow the light to pass through one side of the light-transmitting surface, while the light directed to the side of the reflective surface will be reflected, that is, the incident component 32 is located on the side of the light-transmitting surface of the dichroic mirror 35, and the dimming component 33 and the collecting component 34 are located on the side of the reflective surface of the dichroic mirror 35; in this way, the incident tube is connected to the laser and expands and collimates the incident light, and then the light passes through the light-transmitting surface of the dichroic mirror 35 and points to the dimming component 33, and the dimming component 33 focuses the incident light on the sample to be tested below it to excite the signal light, and the signal light passes through the dimming component 33 again and is expanded and collimated, and reaches the bottom of the dichroic mirror 35 and is reflected by the reflective surface of the dichroic mirror 35 to the collecting tube 341, thereby realizing the excitation and collection of spectral detection.

[0071] Compared with the related art, since the incident component 32 and the collection component 34 are detachably connected to the incident part 311 and the collection part 313, respectively, they can be easily disassembled and assembled; and when calibration is required, the incident component 32 and the collection component 34 can be easily disassembled or displaced relative to the support 31, and the calibration operation is very simple. At the same time, it also provides more possibilities for the expansion and setting of the incident component 32 and the collection component 34 themselves. For example, at least two groups of incident tubes 321 can be set on the incident component 32, and at least two groups of collection tubes 341 can be set on the collection component 34 to assemble into a multi-channel Raman spectroscopy detection device.

[0072] Therefore, the Raman spectrum detection probe provided in the present application can perform multi-channel parallel detection, and can achieve miniaturization limited only by the size of the lens and arbitrary expansion of the number of channels, and the optical path is compact, and the assembly and optical path calibration are simple and easy to operate.

[0073] It should be noted that among the three positions of the connection between the incident part 311 and the incident component 32, the connection between the dimming part 312 and the dimming component 33, and the connection between the collecting part 313 and the collecting component 34, which are provided on the support 31, at least one position can realize a detachable connection, so that the assembly and calibration of the corresponding positions can be simple and easy to operate. For example, in some embodiments, any one of the connection between the incident part 311 and the incident component 32, the connection between the dimming part 312 and the dimming component 33, and the connection between the collecting part 313 and the collecting component 34 is a detachable connection; in other embodiments, the connection between the incident part 311 and the incident component 32, the connection between the dimming part 312 and the dimming component 33, and the connection between the collecting part 313 and the collecting component 34 are all detachable connections.

[0074] For the convenience of description, the connection between the incident part 311 and the incident component 32, the connection between the dimming part 312 and the dimming component 33, and the connection between the collecting part 313 and the collecting component 34 are introduced below as detachable connection solutions.

[0075] In some embodiments, in order to realize the connection between the incident part 311 and the incident component 32, the connection between the dimming part 312 and the dimming component 33, and the connection between the collecting part 313 and the collecting component 34, the detachable connection at these positions further facilitates assembly. Figure 2 , Figure 3 , Figure 4 and Figure 5 The incident part 311, the dimming part 312 and the collecting part 313 can all be groove structures, and the incident component 32, the dimming component 33 and the collecting component 34 can be adapted block structures. The groove structure has a limiting function. When the block structure cooperates with the groove structure, it is necessary to adapt the shape of the groove structure, which can play a guiding and positioning role, and further facilitate assembly.

[0076] Of course, in some embodiments, the positions of the groove structure and the block structure can be interchanged, that is, the incident part 311, the dimming part 312 and the collecting part 313 can all be block structures, and the incident component 32, the dimming component 33 and the collecting component 34 can be matching groove structures. In this embodiment, the block structure and the groove structure can also be matched to guide and position the assembly between them, making the assembly more convenient.

[0077] The groove structure can be formed by a concave portion with closed side walls formed on the support 31, or at least one side wall can penetrate the support 31. In comparison, the groove structure with closed side walls has better positioning and limiting, while the groove structure with at least one side wall penetrating the support 31 can facilitate the installation of the corresponding block structure. For example, refer to Figure 4 and Figure 5 At least one side of the groove structure passes through the support 31, and the block structure can slide into the groove structure along the side of the groove structure passing through the support 31, and the block structure and the groove structure are positioned and fixed by fasteners. In this way, the block structure can slide into the groove structure through the side of the groove structure passing through the support 31, making the installation process more convenient, and the relative position can be adjusted by sliding, and the assembly and calibration operations are simpler.

[0078] On this basis, in order to ensure the positioning and fixation when installed at the required position, gluing, mortise and tenon structure, or fasteners can be used to position and fix the block structure and the groove structure. Fasteners include but are not limited to bolts and nuts, self-tapping screws, rivets, pins, etc.

[0079] It should be noted that at least one side of the groove structure passes through the support 31, including multiple implementations, for example, only one side of the groove structure passes through the support 31, or the groove structure has multiple sides passing through the support 31. Figure 4 and Figure 5 The groove structure has two opposite sides, and the two opposite sides penetrate the support 31. In this way, the groove structure is unobstructed in the direction of penetrating the support 31, and the block structure can be easily slid into the groove structure from either side, and in the process of calibrating the position, there is at least two directions of adjustment space, making the calibration more convenient and accurate.

[0080] In the cooperation between the block structure and the groove structure, the block structure is limited by the side wall of the groove structure. At the same time, in order to limit the cooperation between the block structure and the groove structure when they are abutted, refer to Figure 4 and Figure 5In some embodiments, the block structure includes a base and a boss formed on one side of the base, and the shape of the boss is compatible with the shape of the groove structure. When the block structure and the groove structure are assembled, the boss can slide into the interior of the groove structure accordingly, and part of the base abuts against the periphery of the groove structure on the support 31, so that the assembly positioning of the block structure and the groove joint is more complete and the assembly is more stable.

[0081] In some embodiments of the Raman spectrum detection probe 3 of the present application, in order to reduce costs, some structures can be designed in a standardized manner. For example, the shape and size of the groove structure of the incident part 311 and the collecting part 313 on the support 31 are consistent, the shape and size of the incident component 32 and the collecting component 34 are consistent, and the block structure is adapted to the groove structure. In this way, the outer dimensions of the incident component 32 and the collecting component 34 can be designed and produced in a standardized manner to achieve efficient mass production, and the components can be mutually compatible, which is convenient for quality control and reduces production and use costs.

[0082] Of course, in some embodiments, the shapes and sizes of the groove structures of the incident portion 311 and the collecting portion 313 on the support 31 may also be inconsistent, and the specific structural dimensions may be designed according to actual needs.

[0083] In the embodiment of the Raman spectrum detection probe 3 of the present application, since the incident component 32, the dimming component 33 and the collection component 34 can be detachably connected to the support 31, the incident component 32, the dimming component 33 and the collection component 34 can be designed and manufactured in a modular manner to be suitable for detection with different requirements. For example, the incident component 32 and the collection component 34 can be separately set with multiple channels, and multiple incident components 32 and collection components 34 with different numbers of channels can be set. The same is true for the dimming component 33, and multiple dimming components 33 suitable for samples of different sizes or quantities can be designed and manufactured. Before assembling the Raman spectrum detection probe 3, the incident component 32 and the collection component 34 with the required number of channels, as well as the dimming component 33 that can be adapted to the corresponding sample to be tested can be selected first, and then the three can be assembled on the support 31 respectively to complete the installation of the device and perform corresponding detection.

[0084] Reference Figure 4 and Figure 5In some embodiments, the multiple channels are arranged in the incident component 32 and the collecting component 34 in the following manner: the incident component 32 also includes an incident block 322, the incident block 322 is provided with at least two incident holes 323, and the incident tubes 321 are arranged in the incident holes 323 in a one-to-one manner; the dimming component 33 also includes a mounting plate 331, the mounting plate 331 is provided with at least two dimming holes 332, and the dimming tubes are arranged in the dimming holes 332 in a one-to-one manner; the collecting component 34 also includes a collecting block 342, the collecting block 342 is provided with at least two collecting holes 343, and the collecting tubes 341 are arranged in the collecting holes 343 in a one-to-one manner; the number of the incident tubes 321, the dimming tubes and the collecting tubes 341 is the same, and the outgoing light of the incident tube 321 excites the sample to be tested to generate signal light after passing through the dimming tube, and the excited signal light passes through the dimming tube again and is collected by the collecting tubes 341 in a one-to-one manner. By respectively arranging the incident hole 323 , the dimming hole 332 and the collecting hole 343 on the incident block 322 , the mounting plate 331 and the collecting block 342 , the incident tube 321 , the dimming tube and the collecting tube 341 can be installed and arranged accordingly.

[0085] Reference Figure 5 The number of incident tubes 321, dimming tubes and collecting tubes 341 are all multiple, the incident tubes 321 array is arranged on the incident block 322, the dimming tube array is arranged on the mounting plate 331, and the collecting tubes 341 array is arranged on the collecting block 342. The array arrangement is distributed to improve the utilization of space and contribute to the compactness of the structure. And multi-channel spectral parallel detection is realized.

[0086] It should be noted that the incident tube 321, the dimming tube and the collecting tube 341 can all be structures that can expand, collimate or focus the light to meet the requirements of optical path transmission. At the same time, the incident tube 321 and the collecting tube 341 need to communicate with other external devices for optical signals, and thus optical fibers need to be installed or spatial optical transmission can be used.

[0087] In addition, refer to Figure 3 , Figure 4 and Figure 5In the structure of the incident component 32, a plurality of incident holes 323 are provided on the incident block 322, so that the incident tube 321 can be installed; in the structure of the dimming component 33, a plurality of dimming holes 332 are provided on the mounting plate 331, so that the dimming tube can be installed; in the structure of the collecting component 34, a plurality of collecting holes 343 are provided on the collecting block 342, so that the collecting tube 341 can be installed. That is, in some embodiments of the present application, the incident component 32 can select and transfer different incident tubes 321 according to actual needs, so as to facilitate assembly and adapt to different incident light requirements, and if any of these incident tubes 321 has a problem, it can be removed separately and replaced quickly. Moreover, the incident tube 321 that can be removed and installed separately, in addition to adjusting the optical path with the movement of the incident block 322, can also achieve independent alignment and adjustment by relying on its separate cooperation with the incident hole 323, so that the dimming is more flexible and convenient; similarly, the structures of the dimming component 33 and the collecting component 34 can also be easily replaced and adjusted. Compared with the method of directly integrating all optical fiber channels on a board, it is very conducive to mass production and optical path calibration.

[0088] For example, the structures of the incident tube 321, the dimming tube and the collecting tube 341 can be common, see Fig.10 , Fig.11 , Fig.12 and Fig.13 In some embodiments, the structure may include a sleeve 36 and a lens 37, which is connected to the corresponding structure through the sleeve 36, and collimates or focuses the light through the lens.

[0089] The dimming tube may also include only a lens 37, which is disposed in the sleeve 36 and is used to focus or collimate the light passing therethrough; the incident tube 321 and the collecting tube 341 also include an optical fiber, which is connected to a side of the sleeve 36 away from the dichroic mirror. The lens 37 is used to collimate or focus the light and process the light.

[0090] The lens component 37 of the incident tube 321 is used to collimate the divergent incident light, the lens component 37 of the dimming tube is used to focus the parallel incident light and collimate the divergent signal light, and the lens component 37 of the collecting tube 341 is used to focus the parallel signal light.

[0091] It should be noted that the light at the dimming tube is directly transmitted inside the probe, and the dimming tube only processes the optical signal and does not need to be transmitted through optical fiber. The far end of the incident tube 321 needs to be connected to the laser 1, and the laser of the laser 1 can be transmitted to the incident tube 321 through optical fiber or spatial light; one end of the collecting tube 341 needs to be connected to the detector 2 through optical fiber or spatial light. Therefore, the structure of the dimming tube only needs the sleeve 36 and the lens part 37, and one end of the sleeve 36 of the incident tube 321 and the collecting tube 341 will also be connected to the optical fiber (if the spatial light solution is adopted, there may be no optical fiber). The optical fiber can be plugged into the sleeve through the jack set in the sleeve 36, that is, on one side of the lens part 37, the sleeve 36 is connected to the pigtail core, and the plugged optical fiber is used to transmit the optical signal. For example, refer to Fig.10 , Fig.11 , Fig.12 and Fig.13 , which are several embodiments in which the rear end of the lens member 37 is also connected to an optical fiber; Fig.14 , Fig.15 , Fig.16 and Fig.17 , there are several embodiments in which the lens component 37 is not connected to the optical fiber. The lens component 37 determines the main function of processing the optical path. In the embodiment of the present application, the lens component 37 arranged at the incident tube 321 needs to expand and collimate the incident light. The lens component 37 arranged at the collecting tube 341 is opposite to the incident tube 321 and needs to focus the light into the optical fiber for transmission. The lens component 37 arranged at the dimming tube has two directions of action at the same time, one is to focus and converge the incident light when passing through it so as to illuminate the sample to be tested, and the other is that when the light signal excited on the sample to be tested passes through the dimming tube in the opposite direction, the dimming tube will collimate the scattered light signal.

[0092] For example, several embodiments of lens groups are described below. Fig.10 and Fig.14 In some embodiments, the lens member 37 is a gradient refractive index lens or gradient refractive index optical lens, which is a cylindrical structure and is adapted to the inside of the sleeve 36. The refractive index distribution of the internal material of the lens member 37 changes gradually along its axial direction. The outer contour of such a gradient refractive index lens is generally cylindrical, and focusing or collimation is achieved through the distribution of its internal material, which is convenient for assembly with the sleeve 36 and easy to position. For example, the refractive index of the internal material of the lens member 37 is gradually reduced from the center to the edge along the radial direction.

[0093] Reference Fig.11 and Fig.15 In some embodiments, the lens member 37 includes a convex lens, which is coaxially arranged with the sleeve 36 and fixed in the sleeve 36. That is, a convex lens is arranged in the sleeve 36 to achieve focusing or collimation of the optical signal. The convex lens has low cost, is easy to fix and install, and is convenient to adjust.

[0094] In some embodiments, the lens member 37 is a lens group having a focusing or collimating function, which includes at least one concave lens and at least one convex lens. The lens group and the sleeve 36 are coaxially arranged and fixed in the sleeve 36. The focusing and collimating effects of a single convex lens are limited, so multiple convex lenses and multiple concave lenses can be stacked to achieve a better focusing or collimating effect.

[0095] Reference Fig.12 and Fig.16 In some embodiments, the lens element 37 is a meta-lens, including a light-transmitting substrate 371 and a micro-structure texture area 372 formed on at least one surface of the light-transmitting substrate 371. The lens element 37 and the sleeve 36 are coaxially arranged and fixed in the sleeve 36. The micro-structure texture is a lot of tiny structural textures processed on the surface of the light-transmitting substrate, such as Fresnel lens texture. The meta-lens can achieve a larger range of more efficient focusing or collimation effects within a very small size range, which is more conducive to layout miniaturization.

[0096] The microstructure texture area 372 can be arranged on both sides of the light-transmitting substrate 371, or can be arranged on only one side. For example, refer to Fig.12 and Fig.16 The light-transmitting substrate 371 is a flat plate structure, and the microstructure texture area 372 is arranged on a side of the light-transmitting substrate 371 facing the dichroic mirror.

[0097] In some embodiments of the present application, refer to Fig.13 and Fig.17 The light-transmitting substrate 371 is a convex lens structure, a concave lens structure or a curved surface structure with a flat side and a convex side, and the microstructure texture area 372 is arranged on the plane of the light-transmitting substrate 371 and faces any side of the dichroic mirror 35. That is, the light-transmitting substrate 371 itself can also be a lens, and through different microstructure texture areas 372 and different shapes of the light-transmitting substrate 371, there can be a variety of designs and implementations of lens components 37 with different light processing requirements.

[0098] During the optical signal transmission process inside the probe, there may be some stray light that will affect the accuracy of detection. Therefore, in order to solve the above problem, refer to Figure 5 and Figure 6 In some embodiments, the incident component 32 also includes a first filtering structure 324, and the collecting component 34 also includes a second filtering structure 344. The first filtering structure 324 is arranged on the optical path between the inside of the incident component 32 and the dichroic mirror 35 or on the optical path between the laser 1 and the incident component 32, and the second filtering structure 344 is arranged on the optical path between the dichroic mirror 35 and the inside of the collecting component 34 or on the optical path between the collecting component 34 and the detector 2.

[0099] In a possible implementation of the present application, referring to Figure 5 and Figure 6 , the first filter structure 324 is a first filter, the second filter structure 344 is a second filter, the first filter is arranged at one end of the incident tube 321 facing the dichroic mirror 35, and the second filter is arranged at one end of the collecting tube 341 facing the dichroic mirror 35. Among them, the first filter is used to filter out stray light other than the excitation wavelength; it can be a bandpass filter, or it can be replaced by coating at the end of the incident light receiving end of the excitation fiber receiving laser 1 or the end of the part entering the probe; the second filter is used to filter out Rayleigh light; it can be a longpass filter, or it can be replaced by coating at the incident end of the signal detection fiber or the incident end of the detector 2.

[0100] In some other embodiments, the first filter structure 324 and the second filter structure 344 can both be filter coatings, which are respectively disposed in the incident tube 321 and the collecting tube 341. The filter coating can be plated on the lens 37 or in the sleeve 36, or at the entrance and exit of the laser 1 and the detector 2, etc., as long as they are on the path of light signal transmission. The specific range can be: the filter coating can be disposed in the incident tube 321 and the collecting tube 341, or between the laser 1 and the incident tube 321, and between the collecting tube 341 and the detector 2.

[0101] In addition, the sample loading basic unit on the dimming component 33 can be in the size of millimeters or micrometers. Figure 5 The dimming component 33 may include a mounting plate 331 and a dimming tube (not shown in the figure), the mounting plate 331 is used to carry the dimming tube; the dimming tube is arranged in the dimming hole 332 of the mounting plate 331 and is located between the sample carrier 7 and the dichroic mirror 35, and is used to focus or collimate the light signal passing through the dimming tube.

[0102] In some embodiments of the Raman spectrum detection probe 3 of the present application, the transmission and direction change of the optical signal inside the support 31 are mainly achieved through the dichroic mirror 35. In addition, there should be no other opaque components blocking the optical path between the optical signal and the dichroic mirror 35. Therefore, some structures made of transparent materials can be set on this optical path, or light-transmitting holes can be directly reserved. For example, refer to Figure 5 The support 31 is a square structure surrounded by a plurality of plate-like structures, and a light-transmitting area 314 is formed inside. The incident component 32 and the dimming component 33 are respectively located on two opposite side walls of the support 31 .

[0103] In order to make the structure of the entire Raman spectrum detection probe 3 more compact, refer to Figure 5 , Figure 6 and Figure 7The dichroic mirror 35 is a complete large piece for easy installation and is compatible with multiple parallel light paths passing or reflecting at the same time. It is located in the light-transmitting area 314. The light of the incident component 32 is along the first direction toward the dimming component 33. The dichroic mirror 35 is located on the light path of the incident component 32 toward the dimming component 33, and the dichroic mirror 35 has an angle with the first direction and is not vertically arranged. The collecting light path of the collecting component 34 is the second direction, and the second direction has an angle with the first direction.

[0104] Reference Figure 6 and Figure 7 , the laser light of the incident component 32 passes through the light-transmitting surface of the dichroic mirror 35 along the first direction, and is directed to the sample to be tested below the dimming component 33. The signal light generated by the excitation of the sample to be tested is reflected back to the reflective surface of the dichroic mirror 35, and then is reflected, changes direction, and is directed to the collecting component 34 from the second direction, completing the detection and collection process of the probe. Since the first direction and the second direction have an angle, the positions of the incident component 32 and the collecting component 34 corresponding to the first direction and the second direction will be set at different positions or side walls of the support 31, and can be adjusted and arranged according to actual needs, thereby making good use of the space on the support 31, and reasonably arranging the spatial positions of the incident component 32 and the collecting component 34, so as to achieve a compact structure of the Raman spectrum detection probe 3.

[0105] In some embodiments, the first direction and the second direction are perpendicular, the dichroic mirror 35 has the same angle with the first direction and the second direction, and the signal light generated at the dimming component 33 is emitted toward the dichroic mirror 35 along the first direction and reflected toward the collecting component 34 along the second direction. Figure 5 When the support 31 is roughly rectangular in structure as a whole, the first direction can be a vertical direction, the second direction can be a horizontal direction, the incident component 32 can be set on the top surface of the support 31, the dimming component 33 can be set on the bottom surface of the support 31, and the collecting component 34 can be set on the side wall of the support 31. In this way, the space on the outer wall of the support 31 is reasonably utilized, making the structure compact.

[0106] The side walls around the support 31 can be flexibly provided with the collecting components 34, and the collecting components 34 can be one set or multiple sets. For example, in some embodiments, the incident component 32 is provided on the top wall of the support 31, the collecting component 34 is provided on the side wall of the support 31, and there is one dichroic mirror 35, which is inclined at a first angle relative to the horizontal plane, wherein the first angle is an acute angle.

[0107] In the embodiment of the present application, the parallel optical paths can share a large dichroic mirror 35, making the entire assembly simple and easy.

[0108] For example, in some other embodiments, refer to Figure 5 , Figure 6 and Figure 7 In some embodiments of the present application, there are at least two collecting components 34 (i.e., including two embodiments and multiple embodiments), and they are respectively located on two opposite side walls (opposite or adjacent side walls) of the support 31, and there are two or more dichroic mirrors 35. Taking two as an example, refer to Figure 8 and Fig. 9 The upper ends of the two dichroic mirrors 35 are respectively inclined toward the two corresponding collecting components 34, so as to reflect the signal light generated at the dimming component 33 to the corresponding collecting components 34. In this way, the signal light of a part of the channels transmitted from the dimming component 33 is reflected by one of the dichroic mirrors 35 into one collecting component 34, and the signal light of another part of the channels is reflected by the other dichroic mirror 35 into another collecting component 34. Through the arrangement of the two dichroic mirrors 35, the signal light at different channel positions can be respectively transmitted to two different collecting positions, and collected by the collecting components 34 located at different positions of the support 31. The free space parallel to the first direction is fully utilized to arrange the collecting components, providing a more flexible arrangement method.

[0109] There are many embodiments for the relative position relationship between the two or more dichroic mirrors 35. For example, the two or more dichroic mirrors 35 can be placed opposite to each other or adjacent to each other. Figure 8 In some embodiments, two or more dichroic mirrors 35 may be placed opposite to each other; Fig. 9 In some embodiments, two or more dichroic mirrors 35 may be placed adjacent to each other; the bottom ends of the dichroic mirrors 35 may be butted together, or, as shown in FIG. Figure 3 There is a spacing area between the lower ends of the two dichroic mirrors 35 , and an isolation protrusion is provided in the support 31 corresponding to the spacing area, and the isolation protrusion separates the lower ends of the two dichroic mirrors 35 .

[0110] In some embodiments, in order to facilitate the positioning and installation of the dichroic mirror 35, refer to Figure 2 , Figure 3 , Figure 4 and Figure 5 The support 31 includes an upper seat 315 and a lower base 316, which are buckled together to form the support 31. A avoidance groove 317 is provided at the connection between the upper seat 315 and the lower base 316, and the avoidance groove 317 is adapted to the edge shape of the dichroic mirror 35. Further, when installing the dichroic mirror 35, the upper seat 315 and the lower base 316 can be separated, the dichroic mirror 35 can be placed at the corresponding position of the lower base 316, and then the upper seat 315 can be buckled, and the dichroic mirror 35 can be buckled in the avoidance groove 317.

[0111] For easy installation, refer to Figure 3 and Figure 4In some embodiments, the surface where the upper seat 315 and the lower base 316 meet is adapted to the setting direction of the dichroic mirror 35, and the avoidance groove 317 is set on the lower base 316. In this way, when installing the dichroic mirror 35, the dichroic mirror 35 can be placed in the avoidance groove 317 of the lower base 316 first, and the dichroic mirror 35 will be limited by the avoidance groove 317, and the upper seat 315 can be smoothly buckled on the lower base 316, so that the installation of the dichroic mirror 35 is very convenient.

[0112] It should be noted that the shape of the support 31 can have many embodiments, such as a sphere, a cone, a cylinder, etc. The arrangement of the dichroic mirror 35 can be designed and arranged according to more practical needs. For example, two square dichroic mirrors 35 are symmetrically placed to form a conical structure. Figure 8 As shown, or two square dichroic mirrors 35 are placed adjacent to each other, as shown Fig. 9 As shown, alternatively, the dichroic mirror 35 and the collecting assembly 34 can be an annular structure surrounding the side wall of the support 31.

[0113] In addition, the Raman spectrum detection device provided in the present application includes a laser 1, a detector 2, the Raman spectrum detection probe 3 of the above-mentioned embodiment, a sample carrier 7, a controller 4, a multi-excitation unit 5, and a signal light collection unit 6. The incident tube 321 of the Raman spectrum detection probe 3 is connected to the laser 1 through the multi-excitation unit 5, and the collection tube 341 is connected to the detector 2 through the signal light collection unit 6; the controller 4 controls the laser 1 to emit a laser, and the laser emitted by the laser 1 enters the incident tube 321 of the Raman spectrum detection probe 3 through the multi-excitation unit 5, and then is emitted onto the sample to be tested on the sample carrier 7. After excitation, the signal light generated by the sample to be tested returns to the Raman spectrum detection probe 3 again, is collected by the collection tube 341, and then is transmitted to the detector 2 through the signal light collection unit 6. The data parameters detected by the detector 2 are fed back to the controller 4 to complete calculation and processing operations, thereby finally realizing the entire spectrum detection process. Since the Raman spectroscopy detection device of the embodiment of the present application includes the Raman spectroscopy detection probe 3 of the embodiment of the present application, it has the same technical effect, that is, it can perform multi-channel parallel detection, can achieve miniaturization limited only by the lens size and arbitrary expansion of the number of channels, and the assembly and optical path calibration are simple and easy to operate.

[0114] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application is described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way.

Claims

1. A Raman spectroscopy detection probe, characterized in that: include: A support, wherein a dichroic mirror is disposed in the support, wherein the dichroic mirror has a light-transmitting surface and a light-reflecting surface opposite to each other, and wherein an incident portion, a light-adjusting portion and a collecting portion are disposed on the support; An incident component, detachably connected to the incident part, the incident component comprises at least two groups of incident tubes, the far ends of the incident tubes are used to connect to the laser, and the near ends are directed to the dichroic mirror, and the incident tubes are provided with lens components for expanding and collimating the incident light and directing it to the dichroic mirror; A dimming assembly is detachably connected to the dimming part, wherein the dimming assembly includes at least two groups of dimming tubes, and the dimming tubes have lenses therein for focusing or collimating the light passing therethrough; A collecting assembly, detachably connected to the collecting portion, comprising at least two groups of collecting tubes, wherein the collecting tubes have lenses for focusing and coupling the collected optical signals into optical fibers for transmission to the detector; The incident component is located on one side of the light-transmitting surface of the dichroic mirror, and the dimming component and the collecting component are located on one side of the light-reflecting surface of the dichroic mirror; the light of the incident tube passes through the light-transmitting surface of the dichroic mirror, points to the dimming component, and passes through the dimming component; In the case where the light passing through the dimming component converges on the sample to be tested to excite the signal light, the signal light of the sample to be tested is collimated by the dimming component and then reflected to the collection tube by the reflective surface of the dichroic mirror; There are at least two sets of collecting components, and at least two sets of collecting components are respectively located on opposite or adjacent side walls of the support. There are at least two dichroic mirrors, and the upper ends of at least two dichroic mirrors are respectively inclined toward the corresponding collecting components to reflect the signal light passing through the dimming component to the two collecting components respectively. The support includes an upper seat and a lower base, the upper seat and the lower base are buckled to form the support, a avoidance groove is formed at the connection between the upper seat and the lower base, the avoidance groove is adapted to the edge shape of the dichroic mirror, and the dichroic mirror is limited in the avoidance groove.

2. The Raman spectroscopy detection probe according to claim 1, characterized in that: The incident part, the dimming part and the collecting part on the support are all groove structures, and the incident component, the dimming component and the collecting component are matched block structures.

3. The Raman spectroscopy detection probe according to claim 2, characterized in that: At least one side of the groove structure passes through the support, and the block structure can slide into the groove structure along the side of the groove structure passing through the support, and the block structure is detachably connected and fixed to the groove structure.

4. The Raman spectroscopy detection probe according to claim 2, characterized in that: The block structure comprises a base and a boss formed on one side of the base, the boss can slide into the groove structure accordingly, and the base abuts against the support.

5. The Raman spectrum detection probe according to claim 2, characterized in that: The shapes and sizes of the groove structures of the incident part and the collecting part on the support are consistent, the shapes and sizes of the incident component and the collecting component are consistent, and the block structure is adapted to the groove structure.

6. The Raman spectrum detection probe according to claim 1, characterized in that: The incident component further includes an incident block, the incident block is provided with at least two incident holes, and the incident tubes are arranged in the incident holes in a one-to-one correspondence; the dimming component further includes a mounting plate, the mounting plate is provided with at least two dimming holes, and the dimming tubes are arranged in the dimming holes in a one-to-one correspondence; the collecting component further includes a collecting block, the collecting block is provided with at least two collecting holes, and the collecting tubes are arranged in the collecting holes in a one-to-one correspondence; The number of the incident tubes, the dimming tubes and the collecting tubes is the same. The outgoing light of the incident tube excites the sample to be tested after passing through the dimming tube. The excited signal light passes through the dimming tube again and is collected by the collecting tubes one by one.

7. The Raman spectrum detection probe according to claim 6, characterized in that: The incident tube array is arranged on the incident block, the dimming tube array is arranged on the mounting plate, and the collecting tube array is arranged on the collecting block.

8. The Raman spectrum detection probe according to claim 1, characterized in that: The incident tube and the collecting tube both include a sleeve and a lens component, the lens components of the incident tube and the collecting tube are arranged in the sleeve, the dimming tube includes a lens component arranged inside it, the lens component of the incident tube is used to collimate the divergent incident light, the lens component of the dimming tube is used to focus the parallel incident light and collimate the divergent signal light, and the lens component of the collecting tube is used to focus the parallel signal light; the incident tube and the collecting tube also include an optical fiber, which is connected to the side of the lens component away from the dichroic mirror.

9. The Raman spectrum detection probe according to claim 8, characterized in that: The lens component is a gradient refractive index lens or gradient refractive index optical fiber, which is a cylindrical structure and is adapted to be inside the sleeve. The refractive index of the internal material of the lens component decreases gradually from the center to the edge along the radial direction.

10. The Raman spectrum detection probe according to claim 8, characterized in that: The lens element comprises a convex lens lens, and the convex lens lens is coaxially arranged with the sleeve and fixed in the sleeve.

11. The Raman spectrum detection probe according to claim 8, characterized in that: The lens element is a lens group with convergence or collimation functions, which includes at least one concave lens and / or at least one convex lens. The lens group and the sleeve are coaxially arranged and fixed in the sleeve.

12. The Raman spectrum detection probe according to claim 8, characterized in that: The lens component is a meta-lens, comprising a light-transmitting substrate and a microstructure texture area formed on at least one surface of the light-transmitting substrate. The lens component and the sleeve are coaxially arranged and fixed in the sleeve.

13. The Raman spectrum detection probe according to claim 12, characterized in that: The light-transmitting substrate is a flat plate structure, and the microstructure texture area is arranged on any side of the light-transmitting substrate.

14. The Raman spectrum detection probe according to claim 12, characterized in that: The light-transmitting substrate is a convex lens structure with a flat side and a convex side, or the light-transmitting substrate is a concave lens structure with a flat side and a concave side, and the microstructure texture area is arranged on any side of the light-transmitting substrate.

15. The Raman spectrum detection probe according to claim 1, characterized in that: The support is a cubic structure surrounded by a plurality of plate-like structures, and a light-transmitting area is formed inside. The incident component and the dimming component are respectively located on two opposite side walls of the support, and the dichroic mirror is located in the light-transmitting area. The light of the incident component is directed toward the dimming component along a first direction, and the dichroic mirror is located on a light path from the incident component toward the dimming component, and the dichroic mirror has an angle with the first direction and is non-vertically arranged. The collecting light path of the collecting component is a second direction, and the second direction has an angle with the first direction.

16. The Raman spectrum detection probe according to claim 15, characterized in that: The first direction is perpendicular to the second direction, the dichroic mirror has the same angle with the first direction and the second direction, and the signal light generated by the sample to be tested passes through the dimming component and then is emitted toward the dichroic mirror in the opposite direction of the first direction, and is reflected to the collecting component along the second direction.

17. The Raman spectrum detection probe according to claim 1, characterized in that: The bottom ends of at least two of the dichroic mirrors are butted together, or there is a spacing area between the lower ends of at least two of the dichroic mirrors, and the support is provided with an isolation protrusion corresponding to the spacing area, and the isolation protrusion separates the lower ends of at least two of the dichroic mirrors.

18. The Raman spectrum detection probe according to claim 1, characterized in that: The surface where the upper seat and the lower base meet is adapted to the setting direction of the dichroic mirror, and the avoidance groove is arranged on the lower base.

19. The Raman spectrum detection probe according to any one of claims 1 to 18, characterized in that: The incident component also includes a first filtering structure, and the collecting component also includes a second filtering structure. The first filtering structure is arranged on the optical path from the inside of the incident component to the dichroic mirror, and the second filtering structure is arranged on the optical path from the dichroic mirror to the inside of the collecting component.

20. The Raman spectrum detection probe according to claim 19, characterized in that: The first filter structure is a first filter, the second filter structure is a second filter, the first filter is arranged at one end of the incident tube facing the dichroic mirror, and the second filter is arranged at one end of the collection tube facing the dichroic mirror; Alternatively, the first filter structure and the second filter structure are both filter coatings, and the filter coatings are arranged in the incident tube and the collecting tube, or between the laser and the incident tube, and between the collecting tube and the detector.

21. A Raman spectrum detection device, characterized in that: include: Lasers; detector; The Raman spectroscopy detection probe according to any one of claims 1 to 20, wherein the incident tube of the Raman spectroscopy detection probe is connected to the laser, and the collecting tube is connected to the detector; A sample carrier, arranged below the dimming component of the Raman spectrum detection probe, for placing a sample to be tested; The controller is connected to the laser and the detector and is used to control the laser and the detector and process the information detected by the detector.

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