In-situ spectrum testing system

Abstract

An input end and an output end of a first transmission optical fiber are respectively communicated with an output end of a light source and an input end of a light filtering assembly, and an input end and an output end of a second transmission optical fiber are respectively communicated with an output end of the light filtering assembly and an input end of a spectrograph. The output end of the light filtering assembly is electrically connected with the input end of the spectrograph, and excitation light emission signals can be filtered. The in-situ spectrum testing system is suitable for fluorescence testing and ultraviolet-visible absorption spectrum testing scenes. Wherein the first transmission optical fiber and the second transmission optical fiber are respectively used for optical signal transmission of the light source and optical signal input and output of the light filtering assembly. The light filtering assembly is arranged between the light source and the spectrograph, the photon number of the light source signal can be effectively filtered, and it is guaranteed that a sample with a weak fluorescence signal can be tested while the power of the light source is increased.

Description

Technical Field

[0001] This application relates to the field of spectroscopic testing technologies, and particularly to an in-situ spectroscopic testing system. Background Art

[0002] In-situ spectroscopic testing is a non-destructive analysis technique used to study the electronic structure and fluorescence characteristics of substances. The in-situ spectroscopic testing system it constructs includes fluorescence testing and ultraviolet-visible absorption spectroscopic testing. This system is based on spectroscopic principles and uses characteristic signals generated when light interacts with substances, such as absorption, emission, etc., to analyze the optical properties and electronic structure of substances.

[0003] The in-situ spectroscopic testing system has the following advantages: in-situ spectroscopic testing can be carried out without damaging the sample; it can achieve real-time monitoring of the spectral changes of substances without the sample leaving its natural environment, which is helpful for the study of dynamic processes.

[0004] However, the traditional commercial sample cells have limitations on the size of the reaction device and cannot meet the requirements of in-situ testing. Without using a sample cell, it has a great impact on spectral stability. In addition, the currently reported in-situ fluorescence testing systems cannot be equipped with filters. While increasing the light source power, the number of photons of the light source signal received by the spectrometer exceeds the spectrometer, and it is impossible to further test samples with weak fluorescence signals by increasing the light source power. Summary of the Utility Model

[0005] Embodiments of this application provide an in-situ spectroscopic testing system, aiming to ensure spectral stability while being able to test samples with weak fluorescence signals.

[0006] To achieve the above object, this application provides the following technical solutions:

[0007] An in-situ spectroscopic testing system includes a light source, a spectrometer, a filter assembly, a first transmission optical fiber, and a second transmission optical fiber;

[0008] The input end of the first transmission optical fiber is connected to the output end of the light source, and the output end of the first transmission optical fiber is connected to the input end of the filter assembly;

[0009] The input end of the second transmission optical fiber is connected to the output end of the filter assembly, and the output end of the second transmission optical fiber is connected to the input end of the spectrometer;

[0010] The filter assembly is disposed between the light source and the spectrometer. The input end of the filter assembly is electrically connected to the output end of the light source, and the output end of the filter assembly is electrically connected to the input end of the spectrometer, and it can filter the excitation light emission signal.

[0011] Furthermore, the filter assembly includes a bracket, a filter holder, and a filter;

[0012] The bracket is a groove-shaped structure with the groove opening facing upwards, and a positioning hole is provided at the bottom of the groove of the bracket;

[0013] A support plate is horizontally arranged at the notch of the bracket, and the bottom end surface of the support plate is fixedly connected to the notch end surface of the bracket;

[0014] A through hole is opened in the middle of the support plate, and the junction between the top end surface of the support plate and the edge of the through hole is a step-like structure;

[0015] The filter frame passes through the through hole and is slidably connected to the support plate, and contacts the bottom of the groove of the support;

[0016] The filter is fixedly installed in the middle of the filter holder and can filter the excitation light emission signal.

[0017] Furthermore, the filter frame is in a T-shaped structure as a whole, including a horizontal section and a vertical section, the lower end surface of the horizontal section is in contact with the upper plate surface of the support plate, and the vertical section extends downward from the lower end surface of the horizontal section and is embedded in the positioning hole;

[0018] The middle part of the vertical section is penetrated with an optical hole for placing a filter along the thickness direction thereof.

[0019] Furthermore, the bracket is provided with via holes for connecting the first transmission optical fiber on both side walls of the slot along the slot width direction, and the hole core of the via hole is arranged concentrically with the hole core of the optical hole.

[0020] Furthermore, the connection between the horizontal section and the vertical section abuts against the surface of the step-shaped structure.

[0021] Furthermore, the filter is one of an ultraviolet filter, a visible filter, an infrared filter, a bandpass filter, a cutoff filter, a spectroscopic filter, a neutral density filter, a reflective filter, a soft film filter, and a hard film filter.

[0022] One or more technical solutions provided in the embodiments of the present utility model have at least the following technical effects or advantages:

[0023] In the present application, the first transmission optical fiber and the second transmission optical fiber are used for the transmission of the optical signal of the light source and the input and output of the optical signal of the filter component, respectively. The filter component in the present application is arranged between the light source and the spectrometer, and can effectively filter the number of photons of the light source signal to ensure that the sample with weak fluorescence signal can still be tested while increasing the power of the light source. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments of the present invention or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] Figure 1 Assembly schematic diagram provided by the embodiment of the present application;

[0026] Figure 2 Structural schematic diagram of the bracket and the support plate provided by the embodiment of the present application;

[0027] Figure 3 Structural schematic diagram of the filter component provided by the embodiment of the present application;

[0028] Figure 4 Structural schematic diagram of the filter holder provided by the embodiment of the present application.

[0029] Icon: 10 - light source; 11 - first transmission optical fiber; 12 - spectrometer; 13 - second transmission optical fiber; 20 - bracket; 201 - positioning hole; 202 - through hole; 21 - support plate; 211 - through hole; 22 - filter holder; 221 - horizontal section; 222 - vertical section; 2221 - light hole; 23 - filter. Detailed implementation manners

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0031] In the description of the embodiments of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is the orientation or positional relationship based on the drawings. It is only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. The terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, the terms "installation", "connection", "connection" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific situations.

[0032] Combined with Figures 1 - 4 , an in-situ spectral test system includes a light source 10, a spectrometer 12, a filter assembly, a first transmission optical fiber 11, and a second transmission optical fiber 13; the input end of the first transmission optical fiber 11 is communicated with the output end of the light source 10, and the output end of the first transmission optical fiber 11 is communicated with the input end of the filter assembly; the input end of the second transmission optical fiber 13 is communicated with the output end of the filter assembly, and the output end of the second transmission optical fiber 13 is communicated with the input end of the spectrometer 12; the filter assembly is arranged between the light source 10 and the spectrometer 12, the input end of the filter assembly is electrically connected to the output end of the light source 10, and the output end of the filter assembly is electrically connected to the input end of the spectrometer 12, and can filter the excitation light emission signal.

[0033] The in-situ spectral test system in this application is applicable to fluorescence test and ultraviolet-visible absorption spectral test scenarios, and mainly consists of a light source 10, a spectrometer 12, a filter assembly, and a first transmission optical fiber 11. Among them, the first transmission optical fiber 11 and the second transmission optical fiber 13 are respectively used for the optical signal transmission of the light source 10 and the input and output of the optical signal of the filter assembly. The filter assembly in this application is arranged between the light source 10 and the spectrometer 12, and can effectively filter the number of photons of the light source 10 signal to ensure that the sample with weak fluorescence signal can be tested while increasing the power of the light source 10. The light source 10 in this application can be a common light source or an LED light source.

[0034] The filter assembly includes a bracket 20, a filter frame 22 and a filter 23; the bracket 20 is a groove-shaped structure with the notch facing upward, and a positioning hole 201 is provided at the bottom of the groove of the bracket 20; a support plate 21 is horizontally arranged at the notch of the bracket 20, and the bottom end face of the support plate 21 is fixedly connected to the notch end face of the bracket 20; a through hole 211 is provided in the middle of the support plate 21, and the connection between the top end face of the support plate 21 and the edge of the through hole 211 is in a step-shaped structure; the filter frame 22 passes through the through hole 211 and is slidably connected to the support plate 21, and contacts with the bottom of the groove of the bracket 20.

[0035] The filter assembly in the present application is composed of a bracket 20 and a filter frame 22. The bracket 20 is placed vertically on the work surface. The bracket 20 with a groove structure is stable in structure. The bracket 20 with a horizontal fixed connection of the notch is used to fix the filter frame 22. The setting of the through hole 211 can constrain the filter frame 22, and the middle part of the filter frame 22 is fixedly provided with a filter 23. When in use, the staff member passes the filter frame 22 with the filter 23 installed from top to bottom through the through hole 211 from the support plate 21 and constrains it to the bottom of the bracket 20. The purpose of this setting is to facilitate the staff to use the filter frame 22 with the target filter 23 installed to complete the spectrum test of the target light signal, ensure the authenticity of the spectrum test results, and realize the test results of samples with different photon numbers, enriching the diversity of the test objects. The step-shaped structure of the support plate 21 is set on the one hand to form a positioning for the connection between the filter frame 22 and the support plate 21 to ensure the stable contact between the support plate 21 and the filter frame 22. Furthermore, the arrangement of the positioning hole 201 can ensure that the side surface of the vertical section 222 is perpendicular to the bottom of the bracket 20 , thereby preventing the output surface of the optical signal from forming an angle with the contact surface of the filter 23 , which may cause photon reflection.

[0036] The filter frame 22 is an overall T-shaped structure, including a horizontal section 221 and a vertical section 222. The lower end surface of the horizontal section 221 is in contact with the upper surface of the support plate 21, and the vertical section 222 extends downward from the lower end surface of the horizontal section 221 and is embedded in the positioning hole 201; the middle part of the vertical section 222 is penetrated along its thickness direction with a light hole 2221 for placing the filter 23.

[0037] In the above scheme, the filter frame 22 is arranged in a "T" shape. On the one hand, the horizontal section 221 can be convenient for the staff to take it, and on the other hand, the vertical section 222 can guide the installation path to avoid the working surface of the filter frame 22 and the wall surfaces of the groove walls on both sides of the bracket 20, and the working surface of the filter frame 22 and the photon beam surface of the light signal under the projection of the spatial plumb bob, thereby ensuring that the filter 23 can evenly filter the photons of the strong light signal.

[0038] It should be noted that when the optical signal is transmitted, the photon beam surface is fan-shaped. Through holes 202 for connecting the first transmission optical fiber 11 are provided on both side walls of the bracket 20 along the groove width direction, and the hole centers of the through holes 202 are concentric with the hole centers of the optical holes 2221. The purpose of this setting is to ensure that the optical signal output from the light source 10 can be accurately transmitted to the filter 23 in the filter holder 22, and all of them can be stably transmitted to the input end of the spectrometer 12 after being filtered by the filter 23.

[0039] To ensure the stable connection between the support plate 21 and the filter holder 22, the connection part between the horizontal section 221 and the vertical section 222 abuts against the surface of the stepped structure.

[0040] The filter 23 in this application is an optical element that selectively transmits, reflects, or absorbs light of a specific wavelength through its optical properties (such as refractive index, absorption coefficient, etc.). The filter 23 is one of an ultraviolet filter, a visible filter, an infrared filter, a band-pass filter, a cut-off filter, a beam-splitting filter, a neutral density filter, a reflection filter, a soft film filter, and a hard film filter. The purpose of this setting is to facilitate the staff to select a suitable filter 23 to filter the target signal to achieve the expected test results.

[0041] The various embodiments in this specification are described in a progressive manner. For the same or similar parts between the various embodiments, reference can be made to each other, and the key point of each embodiment is to illustrate the differences from other embodiments.

[0042] The above embodiments are only used to illustrate the technical solutions of the present application, rather than limiting the present application; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; 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 present application.

Claims

1. An in-situ spectral testing system, characterized in that: It comprises a light source (10), a spectrometer (12), a filter assembly, a first transmission optical fiber (11) and a second transmission optical fiber (13); The input end of the first transmission optical fiber (11) is connected to the output end of the light source (10), and the output end of the first transmission optical fiber (11) is connected to the input end of the filter component; The input end of the second transmission optical fiber (13) is connected to the output end of the filter component, and the output end of the second transmission optical fiber (13) is connected to the input end of the spectrometer (12); The filter component is arranged between the light source (10) and the spectrometer (12), the filter component is electrically connected to the light source (10), and the output end of the filter component is electrically connected to the input end of the spectrometer (12), and can filter the excitation light emission signal.

2. The in-situ spectral testing system according to claim 1, characterized in that: The filter assembly comprises a bracket (20), a filter frame (22), and a filter (23); The bracket (20) is a groove-shaped structure with the groove opening facing upwards, and a positioning hole (201) is provided at the bottom of the groove of the bracket (20); A support plate (21) is horizontally arranged at the notch of the bracket (20), and a bottom end surface of the support plate (21) is fixedly connected to an end surface of the notch of the bracket (20); A through hole (211) is provided in the middle of the support plate (21), and a junction between the top end surface of the support plate (21) and the edge of the through hole (211) is in a step-like structure; The filter frame (22) passes through the through hole (211) and is slidably connected to the support plate (21), and contacts the bottom of the groove of the bracket (20); The filter (23) is fixedly mounted in the middle of the filter frame (22) and is capable of filtering the excitation light emission signal.

3. The in-situ spectrum testing system according to claim 2, characterized in that: The filter frame (22) is in a T-shaped structure as a whole, comprising a horizontal section (221) and a vertical section (222), the lower end surface of the horizontal section (221) being in contact with the upper plate surface of the support plate (21), and the vertical section (222) extending downward from the lower end surface of the horizontal section (221) and embedded in the positioning hole (201); A light hole (2221) for placing the optical filter (23) is formed through the middle of the vertical section (222) along its thickness direction.

4. The in-situ spectrum testing system according to claim 3, characterized in that: The bracket (20) is provided with through holes (202) for connecting the first transmission optical fiber (11) on both side groove walls along the groove width direction, and the hole core of the through hole (202) is arranged concentrically with the hole core of the optical hole (2221).

5. The in-situ spectrum testing system according to claim 3, characterized in that: The connection between the horizontal section (221) and the vertical section (222) abuts against the surface of the step-shaped structure.

6. The in-situ spectrum testing system according to claim 2, characterized in that: The filter (23) is one of an ultraviolet filter, a visible filter, an infrared filter, a bandpass filter, a cutoff filter, a spectroscopic filter, a neutral density filter, a reflective filter, a soft film filter, and a hard film filter.

Images