Focusing module, light source assembly and liquid phase detector

Abstract

The present invention provides a focusing module, a light source assembly and a liquid phase detector, which relate to the field of liquid phase detection technology. The focusing module includes a base, a semi-transparent and semi-reflective mirror and a focusing lens; the base includes a first accommodating space and a light hole communicating with the first accommodating space and allowing a mercury lamp light beam to enter; the semi-transparent and semi-reflective mirror and the focusing lens are both installed on the base, and the light hole is located between the semi-transparent and semi-reflective mirror and the focusing lens; the semi-transparent and semi-reflective mirror can couple a tungsten lamp light beam and a mercury lamp light beam, and the coupled light beams converge on the focusing lens through the first accommodating space. The light source assembly includes a focusing module. The liquid phase detector includes a light source assembly. The focusing module solves the technical problem that the deuterium lamp, tungsten lamp and mercury lamp are coupled in the prior art, which makes the detector larger in size.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid phase detection, and in particular to a focusing module, a light source component and a liquid phase detector. Background Art

[0002] The detector is a core module of the high performance liquid chromatograph, responsible for the rapid and accurate detection of the components separated by the chromatographic column to achieve qualitative and quantitative analysis. The most commonly used liquid phase detectors are the UV-Vis absorption detector (UVD) and the diode array detector (DAD). The two detectors usually use deuterium lamps and tungsten lamps as light sources to provide ultraviolet and visible light in a certain wavelength range.

[0003] Among them, in the UV-visible absorption detector, after the light emitted by the light source module is split by the grating, the light of the specified wavelength enters the sample of the flow cell and is absorbed, and finally focused on the sensor for detection, realizing photoelectric conversion, and the processing circuit analyzes and processes the electrical signal to obtain the waveform or parameters required by the user. In the diode array detector, the light emitted by the light source module is converged and passes through the detected mobile phase (liquid) in the flow cell, and then the passing light is reflected on the grating and divided into different bands; the sensor detects the light of various bands, realizes photoelectric conversion, and obtains electrical signals, and the processing circuit analyzes and processes the electrical signals to obtain the waveform or parameters required by the user.

[0004] In the prior art, detectors usually use deuterium lamps and tungsten lamps as light sources, but they cannot be corrected or calibrated. Mercury lamps can usually be used as calibration light sources for wavelength positioning of detectors because they cover characteristic wavelengths from ultraviolet to visible regions. Therefore, detectors can use deuterium lamps, tungsten lamps and mercury lamps as light sources. However, the size of existing detectors using three coupled light sources is relatively large. Summary of the invention

[0005] The purpose of the present invention is to provide a focusing module, a light source assembly and a liquid phase detector to alleviate the technical problem in the prior art that the coupling of a deuterium lamp, a tungsten lamp and a mercury lamp results in a larger volume of the detector.

[0006] In a first aspect, the present invention provides a focusing module, comprising: a base, a semi-transparent and semi-reflective mirror, and a focusing lens.

[0007] The base includes a first accommodating space and a light hole communicating with the first accommodating space and allowing the mercury lamp light beam to enter; the semi-transparent and semi-reflective mirror and the focusing lens are both installed on the base, and the light hole is located between the semi-transparent and semi-reflective mirror and the focusing lens.

[0008] The semi-transparent and semi-reflective mirror can couple the tungsten lamp light beam and the mercury lamp light beam, and the coupled light beam is converged on the focusing lens through the first accommodating space.

[0009] Furthermore, the semi-transparent and semi-reflective mirror is tilted, and the semi-transparent and semi-reflective mirror includes a proximal surface and a distal surface that are relatively arranged, the proximal surface is close to the focusing lens, and the distal surface is far away from the focusing lens.

[0010] The proximal end surface is arranged at an angle with the center line of the focusing lens. The proximal end surface is used to reflect the mercury lamp light beam, and the distal end surface is used to transmit the tungsten lamp light beam.

[0011] Furthermore, the angle between the semi-transparent and semi-reflective mirror and the center line of the focusing lens is 45°.

[0012] Furthermore, the base has a first end surface, a second end surface and a side surface connected therebetween.

[0013] The first end surface is an inclined surface, and the semi-transparent and semi-reflective mirror is fixedly connected to the inclined surface.

[0014] The focusing lens is installed in the first accommodating space and is close to the second end surface.

[0015] The light through hole is opened on the side surface.

[0016] Furthermore, the second end surface of the base forms a first concave platform and a second concave platform inwardly along its axial direction, and the diameter of the first concave platform is greater than the diameter of the second concave platform.

[0017] The pressing ring is plugged into the first concave platform and is used to press the focusing lens so that the focusing lens is clamped on the second concave platform.

[0018] Furthermore, the surface of the pressing ring in contact with the focusing lens is a curved surface, and the curved surface is matched with the outer surface of the focusing lens.

[0019] Beneficial effects:

[0020] The focusing module provided by the present invention has a semi-transparent and semi-reflective mirror and a focusing lens both installed on a base, and a light hole located between the semi-transparent and semi-reflective mirror and the focusing lens. When used specifically, the semi-transparent and semi-reflective mirror can couple the tungsten lamp light beam and the mercury lamp light beam by arranging the mercury lamp and the tungsten lamp, and the coupled light beams are converged on the focusing lens through the first accommodating space. As can be seen from the foregoing, the semi-transparent and semi-reflective mirror can form a coupled light beam, and the focusing lens can focus the coupled light beam and output the coupled light beam. Compared with the prior art, this arrangement has a higher degree of integration of the light source, is easy to miniaturize, and reduces the volume of the detector.

[0021] In a second aspect, the present invention provides a light source assembly, comprising: a focusing shell, a tungsten lamp, a mercury lamp, a deuterium lamp, and the focusing module described in any one of the aforementioned embodiments.

[0022] The light-focusing housing comprises a second accommodating space for installing the light-focusing module, and a first mounting hole, a second mounting hole and a third mounting hole respectively communicating with the second accommodating space.

[0023] The first mounting hole is used to mount the tungsten lamp so that the tungsten lamp light beam can be projected onto one side of the semi-transparent and semi-reflective mirror. The second mounting hole is used to mount the mercury lamp so that the mercury lamp light beam can be projected onto the other side of the semi-transparent and semi-reflective mirror. The third mounting hole is used to mount the deuterium lamp. The deuterium lamp is located on the side of the focusing lens away from the semi-transparent and semi-reflective mirror and is used to receive the coupled light beam.

[0024] Furthermore, the light-collecting housing is also provided with a heat dissipation structure for dissipating the heat in the light-collecting housing to the outside.

[0025] Furthermore, the light source assembly also includes a heat insulation assembly.

[0026] The thermal insulation assembly comprises an isolation seat, a quartz window and a window pressing ring. The isolation seat comprises a mounting hole, and the quartz window is fixedly connected to the mounting hole of the isolation seat through the window pressing ring.

[0027] Positioning bosses are provided at opposite ends of the isolation seat. The isolation seat is positioned and connected to the light-collecting housing via one of the positioning bosses, and the other positioning boss is used for positioning and connecting to the detection component.

[0028] Beneficial effects:

[0029] The light source assembly provided by the present invention includes the aforementioned focusing module. Therefore, the technical advantages and effects achieved by the light source assembly also include the technical advantages and effects achieved by the focusing module, which will not be described in detail here.

[0030] In a third aspect, the present invention provides a liquid phase detector, comprising: a detection component and a light source component as described in any one of the aforementioned embodiments.

[0031] The light-collecting housing is positioned and connected to the detection component via a heat-insulating component.

[0032] Beneficial effects:

[0033] The liquid phase detector provided by the present invention includes the aforementioned light source assembly. Therefore, the technical advantages and effects achieved by the liquid phase detector also include the technical advantages and effects achieved by the light source assembly, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1 A cross-sectional view of a focusing module provided by an embodiment of the present invention, wherein the view shows a partial light beam;

[0036] Figure 2 A schematic diagram of disassembling a focusing module provided in an embodiment of the present invention;

[0037] Figure 3 One of the structural schematic diagrams of the light source assembly provided by an embodiment of the present invention;

[0038] Figure 4 A schematic diagram of a partial disassembly of a light source assembly provided by an embodiment of the present invention;

[0039] Figure 5 One of the longitudinal cross-sectional schematic diagrams of the light source assembly provided by the embodiment of the present invention;

[0040] Figure 6 A second longitudinal cross-sectional schematic diagram of a light source assembly provided by an embodiment of the present invention;

[0041] Figure 7 A second structural schematic diagram of a light source assembly provided by an embodiment of the present invention;

[0042] Figure 8 A schematic structural diagram of a heat insulation component in a light source component provided in an embodiment of the present invention;

[0043] Fig. 9 A schematic diagram of the structure of a liquid phase detector provided by an embodiment of the present invention;

[0044] Fig.10 A schematic diagram of a partial disassembly of a liquid phase detector provided in an embodiment of the present invention.

[0045] icon:

[0046] 100-base; 110-light-through hole; 120-inclined surface; 130-limiting hole;

[0047] 200-semi-transparent and semi-reflective mirror;

[0048] 300-focusing lens;

[0049] 400-pressing ring;

[0050] 500-light-collecting housing; 510-heat dissipation teeth; 520-threaded hole;

[0051] 610-tungsten lamp; 620-mercury lamp; 630-deuterium lamp;

[0052] 700- thermal insulation assembly; 710- isolation seat; 720- quartz window; 730- window pressing ring;

[0053] 800-Detection housing;

[0054] W-tungsten lamp beam; G-mercury lamp beam; O-coupling beam. DETAILED DESCRIPTION

[0055] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0056] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0057] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0058] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0059] In addition, the terms "horizontal" and "vertical" do not mean that the components must be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0060] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0061] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0062] This embodiment provides a focusing module, such as Figure 1 As shown, the focusing module includes a base 100, a semi-transparent and semi-reflective mirror 200 and a focusing lens 300; the base 100 includes a first accommodating space and a light hole 110 that is communicated with the first accommodating space and allows the mercury lamp light beam G to enter; the semi-transparent and semi-reflective mirror 200 and the focusing lens 300 are both installed on the base 100, and the light hole 110 is located between the semi-transparent and semi-reflective mirror 200 and the focusing lens 300; the semi-transparent and semi-reflective mirror 200 can couple the tungsten lamp light beam W and the mercury lamp light beam G, and the coupled light beam O converges on the focusing lens 300 through the first accommodating space.

[0063] In the focusing module provided by the present embodiment, the semi-transparent and semi-reflective mirror 200 and the focusing lens 300 are both installed on the base 100, and the light hole 110 is located between the semi-transparent and semi-reflective mirror 200 and the focusing lens 300. When used specifically, the semi-transparent and semi-reflective mirror 200 can couple the tungsten lamp light beam W and the mercury lamp light beam G by arranging the mercury lamp and the tungsten lamp, and the coupled light beam O converges on the focusing lens 300 through the first accommodating space; from the foregoing, it can be seen that the semi-transparent and semi-reflective mirror 200 can form a coupled light beam O, and the focusing lens 300 can focus the coupled light beam O and output the coupled light beam O. Compared with the prior art, this arrangement has a higher degree of integration of the light source, is easy to miniaturize, and reduces the volume of the detector.

[0064] The focusing lens 300 is a biconvex focusing lens.

[0065] For further information, please refer to Figure 1 The semi-transparent and semi-reflective mirror 200 is tilted, and includes a proximal surface and a distal surface that are relatively arranged, the proximal surface is close to the focusing lens 300, and the distal surface is far away from the focusing lens 300; the proximal surface is arranged at an angle to the center line of the focusing lens 300, the proximal surface is used to reflect the mercury lamp beam G, and the distal surface is used to transmit the tungsten lamp beam W.

[0066] The semi-transparent and semi-reflective mirror 200 is tilted so that it can reflect the mercury lamp light beam G and transmit the tungsten lamp light beam W, that is, the tungsten lamp light beam W and the mercury lamp light beam G can be coupled.

[0067] Specifically, the angle between the half-transparent mirror 200 and the center line of the focusing lens 300 in this embodiment is 45°. This setting can ensure that the mercury lamp beam G can be Figure 1 As shown, the mercury lamp light beam G is incident horizontally into the focusing lens 300 , that is, the mercury lamp light beam G can be incident vertically into the focusing lens 300 , so as to achieve better focusing.

[0068] It should be noted that the mercury lamp beam G is a linear spectrum, the tungsten lamp beam W is a continuous spectrum, and the deuterium lamp beam mentioned later is also a continuous spectrum.

[0069] Reference Figure 2 The base 100 has a first end face, a second end face and a side surface connected therebetween; the first end face is an inclined surface 120, and the semi-transparent and semi-reflective mirror 200 is fixedly connected to the inclined surface 120; the focusing lens 300 is installed in the first accommodating space and is close to the second end face; and the light hole 110 is opened on the side.

[0070] Optionally, the semi-transparent and semi-reflective mirror 200 is adhered to the 45-degree inclined surface of the base by optical lens adhesive such as silicone.

[0071] Combination Figure 1 and Figure 2 , the focusing lens 300 is disposed in the first accommodating space through the pressing ring 400.

[0072] In some embodiments, the second end surface of the base 100 forms a first recess and a second recess along its axial direction inward, and the diameter of the first recess is larger than the diameter of the second recess; the pressing ring 400 is plugged into the first recess to press the focusing lens 300 so that the focusing lens 300 is clamped in the second recess.

[0073] Optionally, the surface of the pressing ring 400 that contacts the focusing lens 300 is a curved surface, and the curved surface is matched with the outer surface of the focusing lens 300 to ensure the stability of the position of the focusing lens 300 and not to damage the lens surface.

[0074] This embodiment also provides a light source assembly, such as Figure 3 or Figure 4As shown, the light source assembly includes a focusing shell 500, a tungsten lamp 610, a mercury lamp 620, a deuterium lamp 630 and the aforementioned focusing module; the focusing shell 500 includes a second accommodating space for installing the focusing module, and a first mounting hole, a second mounting hole and a third mounting hole respectively connected to the second accommodating space; the first mounting hole is used to install the tungsten lamp 610, so that the tungsten lamp light beam W can be projected onto one side of the semi-transparent and semi-reflective mirror 200, the second mounting hole is used to install the mercury lamp 620, so that the mercury lamp light beam G can be projected onto the other side of the semi-transparent and semi-reflective mirror 200, and the third mounting hole is used to install the deuterium lamp 630, which is located on the side of the focusing lens 300 away from the semi-transparent and semi-reflective mirror 200, and is used to receive the coupled light beam O.

[0075] Optionally, the focusing housing 500 is integrally formed by mechanical processing to ensure the accuracy of the center of the light beam of the tungsten lamp 610 and the mercury lamp 620 focusing on the center light port position of the deuterium lamp 630.

[0076] Based on the above embodiment, the tungsten lamp light beam W is projected onto the transmission surface of the semi-transparent and semi-reflective mirror 200, that is, Figure 2 The mercury lamp beam G passes through the light hole 110 and is projected onto the reflecting surface of the semi-transparent and semi-reflective mirror 200, that is, Figure 2 The underside of the semi-transparent and semi-reflective mirror 200 is shown.

[0077] Reference Figure 3 , Figure 4 , Figure 5 or Figure 6 The light-focusing housing 500 is also provided with a heat dissipation structure for dissipating the heat in the light-focusing housing 500 to the outside.

[0078] Optionally, the heat dissipation structure includes heat dissipation teeth 510 .

[0079] In this embodiment, the focusing shell 500 is a machined part that is formed in one piece. Considering the influence of heat dissipation and processing performance, an aluminum alloy series material can be selected. It combines a tungsten lamp 610, a mercury lamp 620, a deuterium lamp 630 and a focusing module together, and has heat dissipating teeth 510 on the upper and lower parts. The spacing, size and other specifications of the heat dissipating teeth 510 are designed according to the temperature of the light source during operation and the normal operating temperature that the entire machine needs to maintain.

[0080] Reference Figure 4 and Figure 5 The second accommodation space is a through hole, one end of the through hole is a second mounting hole, and the other end is used to place the focusing module in the second accommodation space. When installing, first install the focusing module, with the through hole 110 of the focusing module facing downward, according to Figure 5It is installed in the focusing shell 500 in the direction shown; in order to ensure the 45° angle position of the semi-transparent and semi-reflective mirror 200, it can be achieved by setting a fastening screw and a limit hole. Specifically, a threaded hole 520 is opened on the focusing shell 500, and a limit hole 130 is opened on the focusing module. During installation, the fastening screw is screwed into the limit hole 130 through the threaded hole to realize the positioning installation of the focusing module on the focusing shell 500.

[0081] After the focusing module is installed, the tungsten lamp 610, mercury lamp 620 and deuterium lamp 630 are installed respectively. Figure 4 During the specific installation, the tungsten lamp 610 and the deuterium lamp 630 can be installed from the front position of the focusing shell 500, and the mercury lamp 620 can be installed from the side of the focusing shell 500. This installation method allows the user to install the tungsten lamp 610, the mercury lamp 620 and the deuterium lamp 630 outside the focusing shell 500, and they can also be disassembled from the outside of the focusing shell 500. Compared with the prior art that requires disassembly and assembly from the inside of the machine, the disassembly and assembly method of this embodiment is simpler and more convenient.

[0082] Reference Figure 7 and Figure 8 The light source assembly also includes a heat insulation assembly 700; the heat insulation assembly 700 includes an isolation seat 710, a quartz window 720 and a window pressing ring 730, the isolation seat 710 includes a mounting hole, and the quartz window 720 is fixedly connected to the mounting hole of the isolation seat 710 through the window pressing ring 730; positioning bosses are provided at opposite ends of the isolation seat 710, and the isolation seat 710 is positioned and connected to the focusing shell 500 through one of the positioning bosses, and the other positioning boss is used for positioning and connecting with the detection assembly.

[0083] The function of the heat insulation component 700 is, on the one hand, to prevent the heat of the focusing module from being transferred to the detection component on the basis of sealing the focusing housing 500, and on the other hand, the positioning boss on the isolation seat 710 can play a role in positioning and installation.

[0084] The positioning boss is used to achieve positioning connection with the hole on the detection component.

[0085] Optionally, the quartz window 720 is a circular flat quartz plate, and the thickness is generally about 1-2 mm. The window pressing ring 730 is screwed into the isolation seat 710 to press the quartz window 720 tightly.

[0086] When working, the light beam gathered by the focusing module enters the detection component through the quartz window 720. The quartz window 720 is made of a material with high transmittance for the light bands of the tungsten lamp 610, mercury lamp 620, and deuterium lamp 630. The isolation seat 710 and the window pressing ring 730 are made of polyoxymethylene resin and other plastics with good processing performance and not easy to deform. Such materials are selected to prevent the heat generated by the light source from being transferred to the rear detection component.

[0087] It should be noted that in general technology, the sensors and other devices of the detection assembly are relatively sensitive to temperature, and the aluminum alloy material of the focusing housing 500 itself has good thermal conductivity. Direct contact with the detection assembly will cause heat transfer, affecting the operation and performance of the rear-end detection unit. The selection of the above-mentioned materials can prevent the heat generated by the light source from being transferred to the rear-end detection assembly.

[0088] The working principle of the light source assembly is as follows: the mercury lamp beam G and the tungsten lamp beam W are coupled into the focusing lens 300 through the semi-transparent and semi-reflective mirror 200, converged to the central light port position of the deuterium lamp 630, and output together with the deuterium lamp beam into the optical path part of the rear-end detection assembly.

[0089] This embodiment also provides a liquid phase detector, such as Fig. 9 and Fig.10 As shown, the liquid phase detector includes a detection component and the aforementioned light source component; the focusing housing 500 is positioned and connected to the detection component through a heat insulation component 700.

[0090] Specifically, the detection assembly includes a detection housing 800 , and the focusing housing 500 is positioned and connected to the detection housing 800 through a heat insulation assembly 700 .

[0091] Optionally, the detection housing 800 is provided with a positioning hole that cooperates with the positioning boss.

[0092] Since the center position of the light source in the liquid phase detector affects the energy and index of the overall optical path system, the heat insulation component 700 is installed with the focusing module and the detection component through the positioning boss to achieve high-precision tolerance matching between the center point of the light source and the detection component. After the relative position of the focusing module and the detection component is determined, the two are fixed by screws to ensure that the external impact during transportation will not affect the position of the light source component.

[0093] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A focusing module, characterized in that: include: A base (100), a semi-transparent and semi-reflective mirror (200), and a focusing lens (300); The base (100) comprises a first accommodating space and a light hole (110) which communicates with the first accommodating space and allows a mercury lamp light beam (G) to enter; the semi-transparent and semi-reflective mirror (200) and the focusing lens (300) are both mounted on the base (100), and the light hole (110) is located between the semi-transparent and semi-reflective mirror (200) and the focusing lens (300); The semi-transparent and semi-reflective mirror (200) is capable of coupling a tungsten lamp light beam (W) and a mercury lamp light beam (G), and the coupled light beam (O) is converged on the focusing lens (300) through the first accommodating space; The semi-transparent and semi-reflective mirror (200) is arranged tilted, and the semi-transparent and semi-reflective mirror (200) comprises a proximal end face and a distal end face which are arranged opposite to each other, the proximal end face is close to the focusing lens (300), and the distal end face is far from the focusing lens (300); The proximal end surface is arranged at an angle to the center line of the focusing lens (300), the proximal end surface is used to reflect the mercury lamp light beam (G), and the distal end surface is used to transmit the tungsten lamp light beam (W); The angle between the semi-transparent and semi-reflective mirror (200) and the center line of the focusing lens (300) is 45°; The base (100) comprises a first end surface, a second end surface and a side surface connected therebetween; The first end surface is an inclined surface (120), and the semi-transparent and semi-reflective mirror (200) is fixedly connected to the inclined surface (120); the focusing lens (300) is installed in the first accommodating space and is close to the second end surface; The light-through hole (110) is opened on the side surface; The second end surface of the base (100) forms a first concave platform and a second concave platform inwardly along its axial direction, and the diameter of the first concave platform is greater than the diameter of the second concave platform; The pressing ring (400) is plugged into the first concave platform and is used to press the focusing lens (300) so that the focusing lens (300) is clamped on the second concave platform; The surface of the pressing ring (400) in contact with the focusing lens (300) is a curved surface, and the curved surface is adapted to the outer surface of the focusing lens (300).

2. A light source assembly, characterized in that: include: A light-focusing housing (500), a tungsten lamp (610), a mercury lamp (620), a deuterium lamp (630), and the light-focusing module according to claim 1; The light focusing housing (500) comprises a second accommodating space for installing the light focusing module, and a first mounting hole, a second mounting hole and a third mounting hole respectively communicating with the second accommodating space; The first mounting hole is used for mounting the tungsten lamp (610), so that the tungsten lamp light beam (W) can be projected onto one side of the semi-transparent and semi-reflective mirror (200); the second mounting hole is used for mounting the mercury lamp (620), so that the mercury lamp light beam (G) can be projected onto the other side of the semi-transparent and semi-reflective mirror (200); the third mounting hole is used for mounting the deuterium lamp (630); the deuterium lamp (630) is located on a side of the focusing lens (300) away from the semi-transparent and semi-reflective mirror (200), and is used for receiving a coupled light beam (O).

3. The light source assembly according to claim 2, characterized in that: The light-collecting housing (500) is also provided with a heat dissipation structure for dissipating the heat in the light-collecting housing (500) to the outside.

4. The light source assembly according to claim 2, characterized in that: The light source assembly further comprises a heat insulation assembly (700); The heat insulation assembly (700) comprises an isolation seat (710), a quartz window (720) and a window pressing ring (730); the isolation seat (710) comprises a mounting hole; the quartz window (720) is fixedly connected to the mounting hole of the isolation seat (710) via the window pressing ring (730); Positioning bosses are provided at both opposite ends of the isolation seat (710); the isolation seat (710) is positionally connected to the light focusing housing (500) via one of the positioning bosses, and the other positioning boss is used for positionally connecting to a detection component.

5. A liquid phase detector, characterized in that: include: A detection component and a light source component as claimed in any one of claims 2 to 4; The light-collecting housing (500) is positioned and connected to the detection component via a heat insulation component (700).

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