Signal collection optical fiber and spectrograph

Abstract

The utility model belongs to the technical field of optical fibers, and provides a signal collection optical fiber and a spectrograph, comprising an optical fiber, a metal joint, a fixed seat and a plano-convex lens group, wherein one end of the optical fiber is fixedly connected with the metal joint, and the metal joint is detachably connected with the fixed seat; a plano-convex lens group is mounted at one end of the fixing seat away from the metal joint; the plano-convex lens group is used for collecting optical signals and comprises a first plano-convex lens and a second plano-convex lens, and the convex surface of the first plano-convex lens and the convex surface of the second plano-convex lens are oppositely arranged. According to the utility model, the plano-convex lens group is used, the plano-convex lens group comprises the first plano-convex lens and the second plano-convex lens, the convex surfaces of the plano-convex lens and the second plano-convex lens are oppositely arranged, optical signals from different directions can be better converged, light energy which can be collected by the optical fiber is increased, and the signal collection efficiency is improved; besides, the distance between the metal joint and the plano-convex lens group is equal to the focal length of the lens, so that the light can accurately enter the optical fiber after being focused by the lens, and the process of debugging the angle of the optical fiber is simplified.

Description

Technical Field

[0001] This utility model belongs to the field of optical fiber technology, and specifically relates to a signal collection optical fiber and a spectrometer. Background Technology

[0002] Laser-induced breakdown spectrometry (LIBS) is an advanced analytical instrument that uses a laser to induce plasma in a sample, and then analyzes the spectrum emitted by the plasma to determine the sample's chemical composition. In commonly used portable LIBS spectrometers, signal collection typically involves either focusing the light through a lens and collecting it directly with an optical fiber, or directing the signal through an optical path into a slit. However, due to the very small solid angle of the plasma emission light, these methods result in low sensitivity, low collection efficiency, and weak LIBS signals. Furthermore, adjusting the fiber angle requires extremely high precision, and the optical path demands significant installation space and is susceptible to contamination, which in turn affects signal quality. These issues limit the performance and application range of LIBS spectrometers in certain scenarios. Utility Model Content

[0003] To address the problems in the background art, this utility model proposes a signal collection optical fiber and a spectrometer.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A signal-collecting optical fiber includes an optical fiber, a metal connector, a mounting base, and a plano-convex lens assembly.

[0006] One end of the optical fiber is fixedly connected to a metal connector;

[0007] The metal connector is detachably connected to the mounting base;

[0008] The plano-convex lens assembly is mounted on the end of the mounting base away from the metal joint.

[0009] The plano-convex lens group is used to collect optical signals and includes a first plano-convex lens and a second plano-convex lens, wherein the convex surfaces of the first plano-convex lens and the second plano-convex lens are arranged facing each other.

[0010] Preferably, the distance from the metal connector to the first plano-convex lens is equal to the focal length of the first plano-convex lens;

[0011] The focal length of the second plano-convex lens is the same as that of the first plano-convex lens.

[0012] Preferably, the end of the optical fiber away from the metal connector is connected to a standard connector.

[0013] Preferably, the surfaces of the standard connector, optical fiber, and metal connector are covered with silicone protective sleeves.

[0014] Preferably, the fixing base includes a first fixing base and a second fixing base;

[0015] The first fixing seat is embedded in the second fixing seat;

[0016] The first plano-convex lens is mounted on the end of the first mounting base away from the metal connector;

[0017] The second plano-convex lens is mounted on the end of the second mounting base away from the metal connector.

[0018] Preferably, the first fixing base is cylindrical and has a groove at one end, with a notch at the top of the groove for mounting the first plano-convex lens;

[0019] The other end of the first fixing base has a connecting channel, which communicates with the groove and is used to install a metal connector.

[0020] Preferably, the surface of the first fixing seat corresponding to the connecting channel is provided with a stepped surface, and a fixing hole communicating with the connecting channel is opened on the stepped surface.

[0021] Preferably, the first fixing seat has a plurality of through holes on its surface opposite to the fixing hole.

[0022] Preferably, the second fixing seat includes a connecting section and a fixing section;

[0023] The connecting segment is annular and connected to the fixed segment, and the second plano-convex lens is installed at the end of the connecting segment away from the fixed segment;

[0024] The surface of the fixed section is provided with several planes, and at least one plane has several injection holes.

[0025] A spectrometer equipped with the aforementioned signal collection optical fiber.

[0026] The beneficial effects of this utility model are:

[0027] 1. This utility model uses a plano-convex lens group, including a first plano-convex lens and a second plano-convex lens, whose convex surfaces are arranged facing each other, which can better converge light signals from different directions. This design increases the light energy that the optical fiber can collect, thereby improving the signal collection efficiency. In addition, the precise distance between the metal connector and the plano-convex lens group is equal to the focal length of the lens, ensuring that the light can accurately enter the optical fiber after being focused by the lens, thereby simplifying the process of adjusting the optical fiber angle.

[0028] 2. The silicone protective sleeve of this utility model covers the outer surface of optical fibers, connectors and metal parts, providing effective protection and preventing the intrusion of dust and other particles, thereby reducing the possibility of optical path contamination.

[0029] 3. The fixing base of this utility model includes a first fixing base and a second fixing base. The first fixing base is embedded in the second fixing base, which makes the installation and replacement of the plano-convex lens group more convenient. In addition, the internal structure of the first fixing base is designed with grooves and connecting channels, as well as stepped surfaces and fixing holes. These designs help to fix the metal joints and enhance the stability of the structure.

[0030] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained through the structures pointed out in the description and the accompanying drawings. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 An exploded view of a signal-collecting optical fiber according to this invention is shown;

[0033] Figure 2 This illustration shows a cross-sectional view of an assembled signal-collecting optical fiber according to the present invention.

[0034] Figure 3 A schematic diagram of the plano-convex lens assembly of this utility model is shown;

[0035] Figure 4a A schematic diagram of the structure of the first fixing base of this utility model is shown;

[0036] Figure 4b A cross-sectional schematic diagram of the first fixing seat of this utility model is shown;

[0037] Figure 5 A schematic diagram of the structure of the second fixing base of this utility model is shown.

[0038] In the diagram: 1. Standard connector; 2. Silicone protective sleeve; 3. Optical fiber; 4. Metal connector; 5. First fixing base; 501. Through hole; 502. Fixing hole; 503. Groove; 504. Connecting channel; 505. Stepped surface; 6. Second fixing base; 601. Connecting section; 602. Fixing section; 603. Glue injection hole; 7. Plano-convex lens group; 701. First plano-convex lens; 702. Second plano-convex lens. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0040] like Figure 1 As shown, this is a signal-collecting optical fiber that effectively solves the problems existing in the prior art, improves the sensitivity and efficiency of the signal-collecting optical fiber, simplifies the debugging process, reduces optical path contamination, and facilitates maintenance and cleaning. It also enhances the structural stability and the integrated performance of the spectrometer. The collecting optical fiber includes a standard connector 1, a silicone protective sleeve 2, a flexible optical fiber 3, a metal connector 4, a mounting base, and a plano-convex lens assembly 7. One end of the optical fiber 3 is firmly connected to the standard connector 1, and the other end is fixed to the metal connector 4. Furthermore, the silicone protective sleeve 2 covers the outer surfaces of the standard connector 1, the optical fiber 3, and the metal connector 4. The standard connector 1 can be a standard SMA905 connector.

[0041] Furthermore, the metal connector 4 is detachably connected to the mounting base. At the other end of the mounting base, away from the metal connector 4, is a plano-convex lens assembly 7. This plano-convex lens assembly 7 is responsible for focusing the optical signal. For example... Figure 3 As shown, the plano-convex lens group 7 consists of a first plano-convex lens 701 and a second plano-convex lens 702, wherein the convex surfaces of the first plano-convex lens 701 and the second plano-convex lens 702 face each other, while their planes face away from each other. The distance f from the metal connector 4 to the first plano-convex lens 701 is equal to the focal length of the lens; in addition, the focal length of the second plano-convex lens 702 is the same as that of the first plano-convex lens 701.

[0042] It should be noted that, firstly, the arrangement of the plano-convex lens group 7 is crucial. It consists of two opposing plano-convex lens groups 7, namely the first plano-convex lens 701 and the second plano-convex lens 702. This design can better converge light signals from different directions. When light passes through these two lenses, they are focused according to the focal length of the lenses, thus optimizing the light signal before it enters the optical fiber 3 and increasing the light energy that the optical fiber 3 can collect.

[0043] Secondly, the precise distance between the metal connector 4 and the plano-convex lens group 7 also plays a crucial role. The distance between the metal connector 4 and the first plano-convex lens 701 is equal to the focal length of that lens. This design ensures that light rays can accurately enter the optical fiber 3 after being focused by the lens, thereby improving the transmission efficiency of the optical signal.

[0044] Finally, the silicone protective sleeve 2 covers the outer surface of the optical fiber 3, connector, and metal parts, providing effective protection and preventing breakage at the connector.

[0045] like Figure 2 As shown, the fixing base includes a first fixing base 5 and a second fixing base 6. The first fixing base 5 is embedded in the second fixing base 6. A first plano-convex lens 701 is installed at the end of the first fixing base 5 away from the metal connector 4, and a second plano-convex lens 702 is installed at the end of the second fixing base 6 away from the metal connector 4.

[0046] It should be noted that, in Figure 2 In this structure, the two plano-convex lenses are mounted on different mounting bases, which facilitates the installation or replacement of the plano-convex lenses. For example, when it is necessary to replace the first plano-convex lens 701 or the second plano-convex lens 702, the first mounting base 5 and the second mounting base 6 can be separated first, and then the plano-convex lens can be replaced.

[0047] like Figure 4a and Figure 4b As shown, Figure 4a and 4bAs shown, the first mounting base 5 is constructed as a cylindrical structure with a groove 503 at one end. A notch is specially designed at the top of this groove 503 for convenient mounting of the first plano-convex lens 701. To further enhance the stability and functionality of the structure, a connecting channel 504 is provided at the other end of the first mounting base 5. The connecting channel 504 not only communicates with the groove 503, ensuring a smooth connection between the optical element and the metal connector 4, but its design also takes into account the needs of easy installation and maintenance. Furthermore, to ensure the stability of the connection, a stepped surface 505 is provided on the surface of the first mounting base 5 corresponding to the connecting channel 504. A fixing hole 502 communicating with the connecting channel 504 is also specially provided on the stepped surface 505, which not only enhances the strength of the structure but also provides additional fixing points to ensure the stable installation of the metal connector 4. To further enhance the versatility of the mounting base, two through holes 501 are also provided on the surface of the first mounting base 5 opposite to the fixing hole 502. These through holes 501 can be used to install other auxiliary components or for further structural reinforcement.

[0048] It should be noted that the groove 503 and connecting channel 504 inside the first fixing base 5 form a stepped structure. When the metal connector 4 mates with the connecting channel 504, insulating positioning pins can be inserted into the fixing hole 502 or glue can be applied to fix the metal connector 4. In summary, the design of the first fixing base 5 fully considers the installation requirements of optical components, structural stability, and multifunctionality. Through the carefully designed groove 503, notch, connecting channel 504, stepped surface 505, fixing hole 502, and through hole 501, the efficient operation and long-term reliability of the entire optical system are ensured.

[0049] like Figure 5 As shown, the second fixing base 6 includes a connecting section 601 and a fixing section 602. The connecting section 601 is annular and connected to the fixing section 602. A second plano-convex lens 702 is installed at the end of the connecting section 601 away from the fixing section 602. The surface of the fixing section 602 is provided with three mutually perpendicular planes, and at least one plane is provided with a plurality of glue injection holes 603.

[0050] It should be noted that when the first fixing seat 5 and the second fixing seat 6 are engaged, the through hole 501 of the first fixing seat 5 can be engaged and overlapped with the glue injection hole 603 on the surface of the fixing section 602. At this time, glue can be injected into the glue injection hole 603 and an insulating positioning pin can be inserted to fix the first fixing seat 5 and the second fixing seat 6 together.

[0051] A spectrometer is provided, which is equipped with the aforementioned signal collection optical fiber, specifically a laser-induced breakdown spectrometer.

[0052] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A signal collection optical fiber, characterized in that, Includes optical fiber (3), metal connector (4), mounting base and plano-convex lens assembly (7); One end of the optical fiber (3) is fixedly connected to the metal connector (4); The metal connector (4) is detachably connected to the fixing base; The plano-convex lens group (7) is installed at the end of the fixing base away from the metal joint (4); The plano-convex lens group (7) is used to collect optical signals and includes a first plano-convex lens (701) and a second plano-convex lens (702), wherein the convex surface of the first plano-convex lens (701) and the convex surface of the second plano-convex lens (702) are arranged facing each other.

2. The signal collection optical fiber according to claim 1, characterized in that, The distance from the metal connector (4) to the first plano-convex lens (701) is equal to the focal length of the first plano-convex lens (701); The focal length of the second plano-convex lens (702) is the same as that of the first plano-convex lens (701).

3. The signal collection optical fiber according to claim 1, characterized in that, The end of the optical fiber (3) away from the metal connector (4) is connected to a standard connector (1).

4. The signal collection optical fiber according to claim 3, characterized in that, The standard connector (1), optical fiber (3) and metal connector (4) are covered with silicone protective sleeves (2).

5. The signal collection optical fiber according to claim 1, characterized in that, The fixing base includes a first fixing base (5) and a second fixing base (6); The first fixing seat (5) is embedded in the second fixing seat (6); The first plano-convex lens (701) is mounted on the end of the first fixing base (5) away from the metal connector (4); The second plano-convex lens (702) is mounted on the end of the second mounting base (6) away from the metal connector (4).

6. The signal collection optical fiber according to claim 5, characterized in that, The first fixing base (5) is cylindrical and has a groove (503) at one end. The top of the groove (503) has a notch, which is used to install the first plano-convex lens (701). The first fixing base (5) has a connecting channel (504) at the other end, which communicates with the groove (503) and is used to install the metal connector (4).

7. The signal collection optical fiber according to claim 6, characterized in that, The first fixing seat (5) has a stepped surface (505) on the surface corresponding to the connecting channel (504), and a fixing hole (502) communicating with the connecting channel (504) is provided on the stepped surface (505).

8. The signal collection optical fiber according to claim 7, characterized in that, The first fixing base (5) has several through holes (501) on its surface relative to the fixing hole (502).

9. A signal collecting optical fiber according to any one of claims 5-8, characterized in that, The second fixing base (6) includes a connecting section (601) and a fixing section (602); The connecting segment (601) is annular and connected to the fixed segment (602), and the second plano-convex lens (702) is installed at the end of the connecting segment (601) away from the fixed segment (602); The surface of the fixed section (602) is provided with several planes, and at least one plane is provided with several injection holes (603).

10. A spectrometer, characterized in that, The fiber optic cable for signal collection as described in any one of claims 1-9 is installed.

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