Optical fiber slip ring with large numerical aperture

Abstract

The utility model provides a large numerical aperture optical fiber slip ring comprising a stator assembly, one end of which is provided with a first optical fiber transmission channel and is provided with a stator optical fiber connecting piece used for connecting the stator assembly to an external optical signal source device; the inner circumferential wall, close to one end, of the rotor assembly is rotationally connected with the outer circumferential wall, close to the other end, of the stator assembly, and the end, away from the stator assembly, of the rotor assembly is provided with a second optical fiber transmission channel right facing the first optical fiber transmission channel; one end, far away from the first optical fiber transmission channel, of the second optical fiber transmission channel is provided with a rotor optical fiber connecting piece for connecting the second optical fiber transmission channel to optical fiber equipment; and the two air gap doublet lenses are symmetrically arranged in the first optical fiber transmission channel and the second optical fiber transmission channel respectively. The transmission efficiency of the large-core-diameter and large-numerical-aperture optical fiber is improved, high-power, high-definition and high-stability transmission of the optical signals in the transmission process is ensured, and the transmission requirements of the optical signals with different wavelengths and different powers can be met.

Description

Technical Field

[0001] The present application relates to the field of optoelectronic technology, and in particular to a large numerical aperture optical fiber slip ring. Background Art

[0002] Fiber optic slip ring, also known as fiber optic rotary connector (FORJ), is a rotating connection component that uses optical fiber as a data transmission medium. Its main function is to achieve the transmission of optical signals and optical energy between two relatively rotating components, ensuring that the signal and optical energy are not interrupted during the rotation process. It is widely used in places that require large-capacity data, continuous or intermittent signal transmission, such as high-definition video transmission systems, high-light energy transmission, microwave communications, medical equipment, sensor signal measurement, radar and video surveillance, etc.

[0003] The existing optical fiber slip ring is usually made of self-focusing lens, and the optical fiber slip ring made of self-focusing lens has the following defects:

[0004] (1) High machining precision requirements: The core diameter of the optical fiber is very small (such as 9um for single-mode optical fiber), and the light beam emitted from the end face of the optical fiber has a certain divergence angle. Therefore, when installing the self-focusing lens into the optical fiber slip ring, extremely high machining precision is required to ensure the alignment of the lens and the optical fiber to avoid the loss of the optical signal. However, this high precision requirement may be difficult to fully meet in actual production, thus affecting the performance of the optical fiber.

[0005] (2) Sensitivity to angular deviation: The expanded beam optical fiber slip ring adds a lens between the stator and rotor sections. Although this structure can reduce the impact of axial clearance on coupling efficiency, it is extremely sensitive to angular deviation. Once the angle between the lens groups deviates, it will have a significant impact on the optical coupling efficiency. Therefore, the angular deviation needs to be strictly controlled during the manufacturing and installation process.

[0006] (3) High cost: The manufacturing process of the self-focusing lens is complex and has high requirements for materials and equipment, which leads to its relatively high cost. In addition, in order to ensure the performance and quality of the fiber slip ring, strict testing and screening are required, which further increases the production cost of the fiber slip ring.

[0007] (4) Limited environmental adaptability: The performance of the self-focusing lens may be affected by factors such as ambient temperature and humidity. When using the fiber optic slip ring in extreme environments, special attention should be paid to its environmental adaptability and appropriate measures should be taken to protect the lens and optical fiber from damage.

[0008] Based on this, the present application proposes a large numerical aperture optical fiber slip ring. Utility Model Content

[0009] The present application provides a large numerical aperture optical fiber slip ring to solve the technical problems described in the above background technology.

[0010] In order to solve the above technical problems, this application adopts the following technical solutions:

[0011] The present application provides a large numerical aperture optical fiber slip ring, comprising:

[0012] A stator assembly, one end of which is provided with a first optical fiber transmission channel and a stator optical fiber connector for connecting the stator assembly to an external optical signal source device;

[0013] A rotor assembly, wherein an outer peripheral wall of the rotor assembly near one end thereof is rotatably connected to an inner peripheral wall of the stator assembly near the other end thereof, a second optical fiber transmission channel facing the first optical fiber transmission channel is provided at one end of the rotor assembly away from the stator assembly, and a rotor optical fiber connector for connecting the second optical fiber transmission channel to the optical fiber device is provided at one end of the second optical fiber transmission channel away from the first optical fiber transmission channel;

[0014] Two air-gap doublet lenses are symmetrically arranged in the first optical fiber transmission channel and the second optical fiber transmission channel respectively.

[0015] Optionally, the air-gap doublet lens comprises a first lens and a second lens;

[0016] The first lens and the second lens are arranged in the first optical fiber transmission channel or the second optical fiber transmission channel with a first preset distance between them;

[0017] The first preset distance is 0.1 mm to 0.3 mm.

[0018] Optionally, the outer peripheral wall of the first lens and the outer peripheral wall of the second lens are bonded to the inner peripheral wall of the first optical fiber transmission channel or the inner peripheral wall of the second optical fiber transmission channel through an adhesive layer.

[0019] Optionally, the radius of curvature of the first lens is 0.2 to 0.8 times the radius of curvature of the second lens.

[0020] Optionally, the first lens is made of a high-dispersion material, and the second lens is made of a low-dispersion material; or,

[0021] The first lens is made of a low-dispersion material, and the second lens is made of a high-dispersion material.

[0022] Optionally, ends of two second lenses that are close to each other extend out of the first optical fiber transmission channel and the second optical fiber transmission channel respectively.

[0023] Optionally, the stator assembly includes a first cylinder and a first baffle;

[0024] The length of the first baffle matches the outer diameter of the first cylinder. The first baffle is arranged on one side of the first cylinder. The first optical fiber transmission channel is opened in the middle of the first baffle and its length matches the thickness of the first baffle.

[0025] Optionally, the rotor assembly includes a second cylinder and a second baffle;

[0026] The length of the second baffle is greater than the diameter of the second cylinder, the outer diameter of the second cylinder is smaller than the outer diameter of the first cylinder, and one end of the second baffle extends into the first cylinder and is rotatably connected to the first cylinder through a bearing, one end of the second baffle is arranged at an end of the second cylinder away from the first cylinder, and the second optical fiber transmission channel is opened in the middle of the second baffle and its length matches the thickness of the second baffle.

[0027] Optionally, an annular clamping plate is sleeved on the outer peripheral wall of the first baffle at one end away from the second baffle.

[0028] Optionally, an end of the first cylinder away from the first baffle is a second preset distance away from the second baffle;

[0029] The second preset distance is 0.2 mm to 0.5 mm.

[0030] The large numerical aperture fiber slip ring provided by the present application is provided with an air gap doublet lens in a first optical fiber transmission channel on one side of the stator assembly and a second optical fiber transmission channel on one side of the rotor assembly. Since the air gap doublet lens is a composite lens composed of two single lenses made of different materials, the air gap doublet lens has the advantages of low reflectivity, high damage threshold and large clear aperture, and can allow more light to pass through, reducing the loss of optical signals. The large numerical aperture fiber slip ring thus prepared can not only correct the chromatic aberration between light rays of different wavelengths and ensure that light rays of different wavelengths can be focused on the same plane, but also correct the spherical aberration generated during the transmission of light rays, improve the transmission efficiency of large core diameter and large numerical aperture optical fibers, ensure that optical signals are transmitted at high power, high definition and high stability during the transmission process, and can adapt to the transmission requirements of optical signals of different wavelengths and different powers, thereby significantly improving the optical performance of the large numerical aperture fiber slip ring. In addition, there is a certain gap between the two lenses in each air-gap doublet lens, that is, there is no need to use an adhesive to bond the two lenses together, thereby avoiding the problems of ultraviolet light penetration and laser damage sensitivity caused by the adhesive, improving the environmental adaptability of the large numerical aperture fiber slip ring, and reducing the risk of damage to the lens group in harsh environments, thereby increasing the freedom of optical design. The air-gap doublet lens has a small size and weight, and can be well integrated with optical components such as optical fibers. Therefore, the large numerical aperture fiber slip ring can be easily integrated into various optical systems, which helps to improve the integration and optical performance of the entire optical system. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0032] Figure 1 A schematic diagram of the structure of a large numerical aperture optical fiber slip ring is provided for one embodiment of the present application;

[0033] Figure 2 A schematic structural diagram of a large numerical aperture optical fiber slip ring provided by another embodiment of the present application;

[0034] Figure 3 A schematic diagram of the partial structure of a large numerical aperture optical fiber slip ring provided in one embodiment of the present application;

[0035] Figure 4 This is a rendering of a large numerical aperture fiber slip ring provided in one embodiment of the present application.

[0036] In the figure: 100, stator assembly; 101, first optical fiber transmission channel; 102, stator optical fiber connector; 103, first cylinder; 104, first baffle; 200, rotor assembly; 201, second optical fiber transmission channel; 202, rotor optical fiber connector; 203, second cylinder; 204, second baffle; 300, air gap doublet lens; 301, first lens; 302, second lens; 400, first preset distance; 500, adhesive layer; 600, bearing; 700, clamping plate; 800, second preset distance. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application is clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work also fall within the scope of protection of the present application.

[0038] refer to Figures 1 to 4 The present application provides a large numerical aperture optical fiber slip ring, comprising:

[0039] A stator assembly 100, one end of which is provided with a first optical fiber transmission channel 101 and a stator optical fiber connector 102 for connecting the stator assembly 100 to an external optical signal source device; wherein the stator optical fiber connector 102 matches the light source output port of the external optical signal source device, so as to facilitate connecting the stator assembly 100 to the external optical signal source.

[0040] The rotor assembly 200, the outer peripheral wall of the rotor assembly 200 near one end thereof is rotatably connected to the inner peripheral wall of the stator assembly 100 near the other end thereof, the end of the rotor assembly 200 away from the stator assembly 100 is provided with a second optical fiber transmission channel 201 facing the first optical fiber transmission channel 101, and the end of the second optical fiber transmission channel 201 away from the first optical fiber transmission channel 101 is provided with a rotor optical fiber connector 202 for connecting it to an optical fiber device; wherein the rotor optical fiber connector 202 matches the optical fiber output or optical fiber input port of the optical fiber device, so as to facilitate connecting it to the optical fiber device. In addition, the stator optical fiber connector 102 and the rotor optical fiber connector 202 can be pluggable, so that the stator optical fiber connector 102 is easy to insert into or unplug from an external optical signal source device, and it is easy to insert the rotor optical fiber connector 202 into or unplug from the optical fiber device, thereby improving the convenience of maintaining, upgrading and replacing the optical fiber assembly, and also improving the flexibility and reliability of the optical system.

[0041] Two air gap doublet lenses 300 are symmetrically arranged in the first optical fiber transmission channel 101 and the second optical fiber transmission channel 201. Since the air gap doublet lens 300 is a composite lens composed of two single lenses made of different materials, the air gap doublet lens 300 has the advantages of low reflectivity, high damage threshold and large clear aperture, and can allow more light to pass through, reducing the loss of optical signals. The large numerical aperture optical fiber slip ring prepared thereby can not only realize the correction of chromatic aberration between light of different wavelengths, ensuring that light of different wavelengths can be focused on the same plane, but also correct the spherical aberration generated during the transmission of light, improve the transmission efficiency of large core diameter and large numerical aperture optical fiber, ensure that the optical signal is transmitted at high power, high definition and high stability during the transmission process, and can adapt to the transmission requirements of optical signals of different wavelengths and different powers, thereby significantly improving the optical performance of the large numerical aperture optical fiber slip ring. In addition, there is a certain gap between the two lenses in each air-gap doublet lens 300, that is, there is no need to use an adhesive to bond the two lenses together, thereby avoiding the problems of ultraviolet light penetration and laser damage sensitivity caused by the adhesive, improving the environmental adaptability of the large numerical aperture fiber slip ring, and reducing the risk of damage to the lens group in harsh environments, thereby increasing the freedom of optical design. The air-gap doublet lens 300 has a small size and weight, and can be well integrated with optical components such as optical fibers. Therefore, the large numerical aperture fiber slip ring can be easily integrated into various optical systems, which helps to improve the integration and optical performance of the entire optical system.

[0042] In actual use of the large numerical aperture fiber slip ring provided by the present application, the stator fiber connector 102 on one end of the stator assembly 100 is connected to an external optical signal source device, so that the electrical signal is converted into an optical signal through a photoelectric converter (for example: a laser diode), and the converted optical signal is input to the stator assembly 100 of the fiber slip ring through the optical fiber, and then enters the rotor assembly 200 through the first optical fiber transmission channel 101 opened on one side of the stator assembly 100 and the air gap doublet lens 300 in the first optical fiber transmission channel 101. When the rotor assembly 200 starts to rotate, the optical fiber entering the rotor assembly 200 also rotates, so that the optical signal is output to the receiving end of the optical fiber device through the second optical fiber transmission channel 201 opened on one side of the rotor assembly 200, the air gap doublet lens 300 in the second optical fiber transmission channel 201, and the rotor optical fiber connector 202, and the photoelectric detector in the optical fiber device converts the received optical signal into an electrical signal, thereby completing the data transmission.

[0043] Further, by Figure 4It can be seen that the large numerical aperture fiber slip ring of the present application can stably and quickly transmit optical signals, making it widely used in various occasions that require rotational connection and high-speed data transmission, such as industrial automation, aerospace, medical equipment, robotics and other fields. In addition, compared with the 0.14 numerical aperture optical fiber that can be used in the original optical system, the numerical aperture of the optical fiber used in the large numerical aperture fiber slip ring of the present application can be increased to 0.5.

[0044] In some embodiments, reference Figure 1 , Figure 2 and Figure 3 The air gap doublet lens 300 in the present application includes a first lens 301 and a second lens 302; specifically, the first lens 301 and the second lens 302 are arranged in the first optical fiber transmission channel 101 or the second optical fiber transmission channel 201 with a first preset distance 400 between them; the first preset distance 400 indicates that the first lens 301 and the second lens 302 are not bonded together by an adhesive, thereby avoiding problems such as ultraviolet light penetration and laser damage sensitivity caused by the adhesive, improving the environmental adaptability of the large numerical aperture optical fiber slip ring, and reducing the risk of damage to the lens group in harsh environments.

[0045] In addition, the first preset distance 400 is 0.1 mm to 0.3 mm. The first preset distance 400 is mainly set to add more variable factors in the optical design, so as to better eliminate chromatic aberration and optimize aberration performance. Therefore, the first preset distance 400 is set to solve the chromatic aberration problem and optimize the overall optical performance by adding additional variables. The first preset distance 400 can optimize the optical performance of the large numerical aperture fiber slip ring within the above range. The distance value of the first preset distance 400 can be set according to actual needs, and this application does not specifically limit it.

[0046] In some embodiments, reference Figure 2 In the present application, the outer peripheral wall of the first lens 301 and the outer peripheral wall of the second lens 302 are bonded to the inner peripheral wall of the first optical fiber transmission channel 101 or the inner peripheral wall of the second optical fiber transmission channel 201 through the bonding layer 500. The bonding layer 500 can be a two-component epoxy adhesive, such as CM103, or a fiber optic adhesive, such as EPO-TEK301-2. The above-mentioned adhesive has the characteristics of fast curing speed, smooth surface after curing, and low friction coefficient, which helps to reduce additional loss, so that the outer peripheral wall of the first lens 301 and the outer peripheral wall of the second lens 302 are more firmly bonded to the inner peripheral wall of the first optical fiber transmission channel 101 or the inner peripheral wall of the second optical fiber transmission channel 201.

[0047] In some embodiments, the radius of curvature of the first lens 301 in the present application is 0.2 to 0.8 times the radius of curvature of the second lens 302. The first lens 301 and the second lens 302 have different radii of curvature, mainly to optimize aberrations (mainly chromatic aberration and spherical aberration) in optical design. By adjusting the radii of curvature of the first lens 301 and the second lens 302, the chromatic aberration problem caused by the difference in refractive index of different materials can be better corrected, and the spherical aberration caused by irregular lens shape or manufacturing error can also be effectively reduced, thereby improving the imaging quality. The specific values ​​of the radii of curvature of the first lens 301 and the second lens 302 can be set according to actual needs, so the present application does not specifically limit them here.

[0048] In some embodiments, the first lens 301 in the present application is made of a high dispersion material, and the second lens 302 is made of a low dispersion material; or, the first lens 301 is made of a low dispersion material, and the second lens 302 is made of a high dispersion material. Among them, the different materials of the first lens 301 and the second lens 302 can effectively correct chromatic aberration and spherical aberration, thereby improving the imaging quality, and the high dispersion material can be graphene, flint glass, hyperbolic metamaterial (HMM), IP-n162 photoresist, transparent ceramics, and Bragg fiber in optical fiber, etc., and the above materials have unique dispersion characteristics. The low dispersion material can be crown glass, fluorite, radiation-resistant fluorophosphate glass, etc., and the above materials have low refractive index and low dispersion characteristics, and are suitable for negative lenses in space high-orbit optical imaging systems. They are widely used in optical design to improve imaging quality and reduce chromatic aberration. Therefore, the manufacturing materials of the first lens 301 and the second lens 302 can be set according to actual needs, and this application does not specifically limit them here.

[0049] In some embodiments, reference Figure 1 and Figure 2 In the present application, the two second lenses 302 extend out of the first optical fiber transmission channel 101 and the second optical fiber transmission channel 201 at their respective ends close to each other, which can effectively change the direction and focusing characteristics of the light, thereby achieving effective control and guidance of the light, thereby achieving light expansion and collimation.

[0050] In some embodiments, reference Figure 1 and Figure 2The stator assembly 100 in the present application includes a first cylinder 103 and a first baffle 104; specifically, the length of the first baffle 104 matches the outer diameter of the first cylinder 103, the first baffle 104 is arranged on one side of the first cylinder 103, and the first optical fiber transmission channel 101 is opened in the middle of the first baffle 104 and its length matches the thickness of the first baffle 104. Among them, the first baffle 104 and the first cylinder 103 can be integrally formed, and the stator optical fiber connector 102 is connected to the end of the first baffle 104 away from the first cylinder 103. In actual use, the stator optical fiber connector 102 is connected to an external optical signal source, so that the electrical signal is converted into an optical signal through a photoelectric converter (for example: a laser diode), and the converted optical signal is input to the stator component 100 of the optical fiber slip ring through the optical fiber, and then enters the rotor component 200 through the first optical fiber transmission channel 101 opened on one side of the stator component 100 and the air gap doublet lens 300 in the first optical fiber transmission channel 101, and the air gap doublet lens 300 increases the core diameter of the optical fiber, so that it can be suitable for optical fibers with larger core diameters.

[0051] In some embodiments, reference Figure 1 and Figure 2 The rotor assembly 200 in the present application includes a second cylinder 203 and a second baffle 204; specifically, the length of the second baffle 204 is greater than the diameter of the second cylinder 203, the outer diameter of the second cylinder 203 is smaller than the outer diameter of the first cylinder 103 and one end of the second cylinder 203 extends into the first cylinder 103 and is rotatably connected to the first cylinder 103 through a bearing 600, one end of the second baffle 204 is arranged at an end of the second cylinder 203 away from the first cylinder 103, and the second optical fiber transmission channel 201 is opened in the middle of the second baffle 204 and its length matches the thickness of the second baffle 204. Among them, the second baffle 204 is integrally formed with the second cylinder 203, and the rotor optical fiber connector 202 is connected to the end of the second baffle 204 away from the second cylinder 203. When the rotor assembly 200 starts to rotate, the optical fiber entering the rotor assembly 200 also rotates accordingly, so that the optical signal is output to the receiving end of the optical fiber device through the rotating joint through the second optical fiber transmission channel 201 opened on one side of the rotor assembly 200, the air gap doublet lens 300 in the second optical fiber transmission channel 201 and the rotor optical fiber connector 202. The photodetector in the optical fiber device converts the received optical signal into an electrical signal, thereby realizing data transmission.

[0052] In some embodiments, reference Figure 1 and Figure 2In the present application, an annular clamping plate 700 is sleeved on the outer peripheral wall of the first baffle 104 at one end away from the second baffle 204. Since the optical fiber slip ring needs to be fixed on the clamping tool during use, the setting of the annular clamping plate 700 facilitates fixing the first cylinder 103 integrally connected with the first baffle 104 on the clamping tool.

[0053] In some embodiments, reference Figure 2 In the present application, one end of the first cylinder 103 away from the first baffle 104 is a second preset distance 800 from the second baffle 204; wherein, the second preset distance 800 is set to ensure that the second cylinder 203 in the rotor assembly 200 and the second baffle 204 on the second cylinder 203 will not be restricted by the first cylinder 103 during rotation.

[0054] Specifically, the second preset distance 800 is 0.2mm~0.5mm. This is to ensure that the second cylinder 203 in the rotor assembly 200 and the second baffle 204 on the second cylinder 203 will not be restricted by the first cylinder 103 during rotation, and to avoid dust and the like from falling on the outer wall of the second cylinder 203 and affecting the performance of the second cylinder 203 as much as possible. The specific value of the second preset distance 800 can be set according to actual needs. Therefore, this application does not make any specific limitations on it.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions recorded 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 application.

Claims

1. A large numerical aperture optical fiber slip ring, characterized in that: include: A stator assembly (100), wherein one end of the stator assembly (100) is provided with a first optical fiber transmission channel (101) and a stator optical fiber connector (102) for connecting the stator assembly (100) to an external optical signal source device; A rotor assembly (200), wherein an outer peripheral wall of the rotor assembly (200) close to one end thereof is rotatably connected to an inner peripheral wall of the stator assembly (100) close to the other end thereof, a second optical fiber transmission channel (201) facing the first optical fiber transmission channel (101) is provided at one end of the rotor assembly (200) away from the stator assembly (100), and a rotor optical fiber connector (202) for connecting the second optical fiber transmission channel (201) to an optical fiber device is provided at one end of the second optical fiber transmission channel (201) away from the first optical fiber transmission channel (101); Two air gap doublet lenses (300), the two air gap doublet lenses (300) are symmetrically arranged in the first optical fiber transmission channel (101) and the second optical fiber transmission channel (201), respectively.

2. The large numerical aperture optical fiber slip ring according to claim 1, characterized in that: The air-gap doublet lens (300) comprises a first lens (301) and a second lens (302); The first lens (301) and the second lens (302) are arranged in the first optical fiber transmission channel (101) or the second optical fiber transmission channel (201) at a first preset distance (400); The first preset distance (400) is 0.1 mm to 0.3 mm.

3. The large numerical aperture optical fiber slip ring according to claim 2, characterized in that: The outer peripheral wall of the first lens (301) and the outer peripheral wall of the second lens (302) are both bonded to the inner peripheral wall of the first optical fiber transmission channel (101) or the inner peripheral wall of the second optical fiber transmission channel (201) via an adhesive layer (500).

4. The large numerical aperture optical fiber slip ring according to claim 2, characterized in that: The radius of curvature of the first lens (301) is 0.2 to 0.5 times the radius of curvature of the second lens (302).

5. The large numerical aperture optical fiber slip ring according to claim 2, characterized in that: The first lens (301) is made of a high-dispersion material, and the second lens (302) is made of a low-dispersion material; or, The first lens (301) is made of a low-dispersion material, and the second lens (302) is made of a high-dispersion material.

6. The large numerical aperture optical fiber slip ring according to claim 2, characterized in that: One end of the two second lenses (302) that is close to each other extends out of the first optical fiber transmission channel (101) and the second optical fiber transmission channel (201) respectively.

7. The large numerical aperture optical fiber slip ring according to any one of claims 1 to 6, characterized in that: The stator assembly (100) comprises a first cylinder (103) and a first baffle (104); The length of the first baffle (104) matches the outer diameter of the first cylinder (103); the first baffle (104) is arranged on one side of the first cylinder (103); the first optical fiber transmission channel (101) is opened in the middle of the first baffle (104) and its length matches the thickness of the first baffle (104).

8. The large numerical aperture optical fiber slip ring according to claim 7, characterized in that: The rotor assembly (200) comprises a second cylinder (203) and a second baffle (204); The length of the second baffle (204) is greater than the diameter of the second cylinder (203); the outer diameter of the second cylinder (203) is smaller than the outer diameter of the first cylinder (103); one end of the second baffle extends into the first cylinder (103) and is rotatably connected to the first cylinder (103) via a bearing (600); one end of the second baffle (204) is arranged at an end of the second cylinder (203) away from the first cylinder (103); the second optical fiber transmission channel (201) is opened in the middle of the second baffle (204) and its length matches the thickness of the second baffle (204).

9. The large numerical aperture optical fiber slip ring according to claim 8, characterized in that: An annular clamping plate (700) is sleeved on the outer peripheral wall of one end of the first baffle plate (104) away from the second baffle plate (204).

10. The large numerical aperture optical fiber slip ring according to claim 8, characterized in that: An end of the first cylinder (103) away from the first baffle (104) is a second preset distance (800) from the second baffle (204); The second preset distance (800) is 0.2 mm to 0.5 mm.

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