A dual-channel fiber optic rotary connector based on a beam splitter

Abstract

This invention provides a dual-channel fiber optic rotary connector based on a beam splitter, relating to the field of fiber optic communication technology. It includes a stator housing, on which a second communication optical transceiver assembly and an inclined second beam splitter are mounted; a rotating shaft rotatably disposed within the stator housing, on which a first communication optical transceiver assembly and an inclined first beam splitter are mounted; the reflective surfaces of the first and second beam splitters are arranged opposite each other; communication light emitted by the first and second communication optical transceivers assembles a first optical signal transmission channel through the reflection paths of the first and second beam splitters; laser light refracts through the first and second beam splitters to form a second optical signal transmission channel. This invention uses two inclined beam splitters to form an optical path transmission system, simplifying the signal transmission method of the central channel and reducing the difficulty of system assembly and adjustment.

Description

Technical Field

[0001] This invention relates to the field of optical fiber communication and optical transmission technology, and in particular to a dual-channel optical fiber rotary connector based on a beam splitter. Background Technology

[0002] Fiber optic rotary connectors are optoelectronic integrated devices that enable continuous and stable transmission of optical signals between relatively rotating components. They are widely used in weaponry, aerospace, and industrial automation. With the rapid miniaturization and densification of weaponry, higher demands are being placed on the compactness, manufacturing and assembly complexity, operational reliability, and service life of fiber optic rotary connectors.

[0003] Currently, dual-channel fiber optic rotary connectors primarily achieve stable transmission of optical signals under relative motion by combining optical and mechanical systems. Existing technology, patent CN111474634A, discloses a multi-core small-structure optical rotary connector, which includes a stator housing housing containing a stator-end fiber collimator, a rotor-end fiber collimator, a prism mechanism, a driven component, a spindle mechanism, and an active component. The optical system employs a structure combining a fiber collimator and a Dowell prism, while the mechanical system uses a planetary gear transmission mechanism. The center of the planetary gear train is designed as a hollow structure, with all optical paths arranged in this hollow position. Its working principle is as follows: the diverging light emitted from the fiber is collimated into a large-spot parallel light by the collimator. When the parallel light rotates at a speed ω, the Dowell prism rotates in the same direction at a speed ω / 2, thus ensuring that the positions of the emitted and incident light remain unchanged, achieving continuous transmission of the optical signal. This patent optimizes the structure of the mechanical transmission mechanism, ensuring even load distribution among the planetary gears, improving product operational stability, and achieving a compact design.

[0004] However, whether it is the technical solution disclosed in the aforementioned cited patents or other dual-channel fiber optic rotary connectors in the prior art, their core is based on the optical transmission characteristics of the Dowell prism to achieve optical signal redirection. In order to meet the imaging principle of the Dowell prism, a complex mechanical transmission system such as a planetary gear train must be designed. This leads to the following technical defects in the existing technology: First, the product structure is complex and the size is large, making it difficult to adapt to the development needs of miniaturization and densification of weapon equipment; second, the mechanical transmission system contains multiple gears, spindles, bearings and other components, which require high precision in parts processing and are difficult to assemble, which not only increases production costs but also reduces the reliability and stability of the product; third, the existing structure is difficult to assemble and adjust, requires strict optical path alignment accuracy, is inconvenient to maintain, and its service life is difficult to meet the needs of long-term stable operation. Summary of the Invention

[0005] This invention proposes a dual-channel fiber optic rotary connector based on a beam splitter, which solves the problems of high processing difficulty, high alignment requirements, and insufficient reliability and service life in the prior art.

[0006] The technical solution of this invention is implemented as follows:

[0007] A dual-channel fiber optic rotary connector based on a beam splitter includes a stator housing, on which a second communication optical transceiver assembly and an inclined second beam splitter are disposed; a rotating shaft rotatably disposed within the stator housing, on which a first communication optical transceiver assembly and an inclined first beam splitter are disposed; the reflective surfaces of the first beam splitter and the second beam splitter are arranged opposite to each other; communication light emitted by the first and second communication optical transceivers assemblies forms a first optical signal transmission channel through the reflection paths of the first and second beam splitters; laser light forms a second optical signal transmission channel through the refraction paths of the first and second beam splitters.

[0008] Furthermore, the second beam splitter and the first beam splitter are arranged at an angle of 45° relative to the central axis of the stator housing.

[0009] Furthermore, the optical axis of the first optical transceiver component is perpendicular to the rotation center line of the rotation axis; the optical axis of the second optical transceiver component is perpendicular to the rotation center line of the rotation axis.

[0010] Furthermore, the first optical transceiver component includes a first optical fiber collimator, and the second optical transceiver component includes a second optical fiber collimator.

[0011] Furthermore, the first optical communication transceiver assembly also includes a right-angle prism for deflecting the outgoing light from the corresponding optical fiber collimator by 90 degrees, the right-angle prism being disposed at the end of the first optical fiber collimator.

[0012] Furthermore, the second optical communication transceiver assembly also includes a right-angle prism for deflecting the outgoing light from the corresponding fiber collimator by 90 degrees, the right-angle prism being disposed at the end of the second fiber collimator.

[0013] Furthermore, the fiber optic rotary connector also includes a third fiber optic collimator and a fourth fiber optic collimator, which are arranged opposite each other along the rotation center line of the rotation axis.

[0014] Furthermore, the stator housing is connected to the rotating shaft via a bearing assembly. The outer ring of the bearing assembly is connected to the stator housing, and the inner ring of the bearing assembly is connected to the rotating shaft. The stator housing is provided with an outer ring bearing end cap for limiting the outer ring of the bearing assembly, and the rotating shaft is provided with an inner ring bearing end cap for limiting the inner ring of the bearing assembly. The double-end limiting ensures the rotational stability between the rotating shaft and the stator housing.

[0015] Furthermore, the stator housing is provided with a first protective housing for protecting the second beam splitter and the second communication optical transceiver assembly, and the rotating shaft is provided with a second protective housing for protecting the first beam splitter and the first communication optical transceiver assembly. The first protective housing is connected to the stator housing by screws.

[0016] Furthermore, the first protective housing is provided with a second metal sleeve for limiting the second communication optical transceiver component, and the second protective housing is provided with a first metal sleeve for limiting the first communication optical transceiver component.

[0017] The beneficial effects of this invention are as follows: First, by using a first beam splitter and a second beam splitter arranged at an angle to form the core optical path steering system, the reflection and steering of the light beam are directly completed by the beam splitter. The optical path principle is simple and there is no need to match the complex rotation speed ratio required by the Dowell prism, which significantly simplifies the overall optical system structure, reduces the complexity of the system, and has the advantages of high reliability, long life and easy maintenance. It is especially suitable for fields with strict requirements on weight, stability and environmental adaptability.

[0018] Secondly, by directly rotating the shaft relative to the stator housing using a bearing assembly, the necessary Dove prism and complex planetary gear train mechanical transmission system in existing technologies are completely eliminated. This significantly reduces the number of parts and the reliance on machining high-precision complex gears, thereby significantly reducing machining difficulty and production costs, and improving assembly efficiency. Furthermore, the simplified mechanical structure reduces friction and wear between moving parts, and combined with the protective housing for optical elements, it enhances the product's operational stability, reliability, and service life under long-term rotational conditions.

[0019] Furthermore, by adding right-angle prisms to the first and / or second optical communication transceiver components, the emission direction of the optical signal can be flexibly changed, providing more configurable solutions for different optical path layouts and signal type transmissions; and the functions of the laser channel and the communication channel can be interchanged, providing diverse configuration options for different application scenarios and enhancing the product's versatility and adaptability.

[0020] Finally, by setting up a protective shell and through holes, it effectively prevents external debris from contaminating the beam splitter and collimator mirrors, ensuring signal transmission stability during long-term use. It has the advantages of high reliability, long life and easy maintenance, and is especially suitable for weapons and high-end equipment with strict requirements for weight, stability and environmental adaptability. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of a dual-channel fiber optic rotary connector structure based on a beam splitter according to the present invention;

[0023] Figure 2 The optical path working principle diagram when neither the output end of the first fiber collimator nor the second fiber collimator is equipped with a right-angle prism;

[0024] Figure 3 The optical path working principle diagram when the output end of the first fiber collimator is not equipped with a right-angle prism, while the output end of the second fiber collimator is equipped with a right-angle prism;

[0025] Figure 4 The diagram illustrates the optical path working principle when the output end of the first fiber collimator does not have a right-angle prism, while the output end of the second fiber collimator does have a right-angle prism, and a third and fourth fiber collimator are set in the laser channel for communication optical transmission.

[0026] In the diagram: 1. First protective housing; 2. Screw; 3. Inner ring bearing end cap; 4. Stator housing; 5. Bearing assembly; 6. Rotating shaft; 7. Outer ring bearing end cap; 8. Second protective housing; 9. First beam splitter; 10. First fiber collimator; 11. First metal sleeve; 12. Right angle prism; 13. Second fiber collimator; 14. Second beam splitter; 15. Second metal sleeve; 16. Third fiber collimator; 17. Fourth fiber collimator. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Example 1, as Figure 1As shown, an embodiment of the present invention provides a dual-channel fiber optic rotary connector based on a beam splitter. The connector includes a stator housing 4, on which a second beam splitter 14 and a second communication optical transceiver assembly are arranged at an angle; a rotating shaft 6, rotatably disposed within the stator housing 4, on which a first beam splitter 9 and a first communication optical transceiver assembly are arranged at an angle; the reflective surface of the first beam splitter 9 is arranged opposite to the reflective surface of the second beam splitter 14. This connector is mainly used to simultaneously transmit two optical signals between the relatively rotating stator and rotor sections. One signal is a low-power communication optical signal, specifically: the communication light emitted by the first and second communication optical transceivers assemblies forms a first optical signal transmission channel through the reflection paths of the first and second beam splitters 9 and 14; the other signal is a high-power laser signal, specifically: the laser beam forms a second optical signal transmission channel through the refraction paths of the first and second beam splitters 9 and 14.

[0029] In this embodiment, the stator housing 4 serves as the fixed part of the entire connector, and its interior forms a receiving space. The rotating shaft 6 is rotatably disposed in the inner cavity of the stator housing 4 through the bearing assembly 5, and its rotation center line coincides with the central axis of the stator housing 4. Furthermore, holes or bevels for mounting the second beam splitter 14 and the second communication optical transceiver assembly are machined on the stator housing 4 as needed.

[0030] In this embodiment, the rotating shaft 6 serves as the rotating core of the entire connector and is rotatably mounted within the stator housing 4. The rotating shaft 6 is typically a hollow structure to facilitate the passage of laser or communication light. Holes or bevels are machined onto the rotating shaft 6 as needed for mounting the first beam splitter 9 and the first communication optical transceiver assembly. The rotating shaft 6 rotates continuously 360° around its own rotation centerline. By directly supporting the rotating shaft 6 with the bearing assembly 5, the complex transmission mechanisms such as the Dowell prism and planetary gear system required in existing technologies are completely eliminated. This fundamentally solves problems such as high processing difficulty, complex assembly, low transmission efficiency, and limited lifespan due to gear wear. The bearing assembly 5 can use angular contact ball bearings in pairs or in combination to ensure that the axial and radial runout of the rotating shaft 6 remains within a minimal range under high-speed or long-term operation, thereby ensuring the long-term stability of the optical path alignment and greatly extending the product's service life.

[0031] In this embodiment, the first beam splitter 9 is fixedly mounted on the rotating shaft 6. Specifically, a sloping surface is machined on the rotating shaft 6 at a 45° angle to the rotation center line, and the first beam splitter 9 is fixed to this sloping surface by optical adhesive or other clamps. The second beam splitter 14 is fixedly mounted on the corresponding sloping surface on the stator housing 4, such that the reflecting surface of the first beam splitter 9 faces the reflecting surface of the second beam splitter 14. Both the first beam splitter 9 and the second beam splitter 14 are preferably flat beam splitters. One side of the first beam splitter 9 and the second beam splitter 14 can be coated with a total reflection film or a high reflectivity dielectric film, while the other side is coated with an anti-reflection film to reduce reflection loss caused by the glass-air interface. Communication light is incident at an angle of approximately 45° onto the surface coated with the reflective film and is efficiently reflected, changing only the beam direction without changing its collimation characteristics, i.e., beam size and divergence angle. Compared with complex prisms such as Dowell prisms, this beam splitter structure has the advantages of being lightweight, low-cost, easy to mass-produce and adjust, significantly reducing the complexity of the system. In addition to the aforementioned 45° angle, the tilt angles of the first beam splitter 9 and the second beam splitter 14 can also be finely adjusted according to the specific optical path design requirements, and are not strictly limited to 45°, as long as it can ensure that the incident light is reflected and transmitted along the desired path to the next optical element. However, 45° is the most commonly used and easiest to calculate and manufacture angle, which can achieve a 90° beam reversal and is the most compact and efficient in terms of structural layout.

[0032] In this embodiment, the first communication optical transceiver component is integrated on the rotating shaft 6 and rotates with it. The second communication optical transceiver component is integrated on the stator housing 4 and remains stationary. The core function of these two components is to transmit and receive communication optical signals. The communication light emitted by the first communication optical transceiver component has its outgoing optical axis set perpendicular to the rotation center line of the rotating shaft 6. This beam is first reflected by the first beam splitter 9, changes direction, and then shines on the fixed second beam splitter 14. After being reflected by the second beam splitter 14, its optical path direction is adjusted again, and it is finally received by the second communication optical transceiver component. Conversely, if the optical signal is transmitted from the stator end to the rotor end, the optical path follows the same reflection principle, only in the opposite direction. The advantage of this optical path design is that although the first beam splitter 9 rotates continuously with the rotating shaft 6, its relative position and angular relationship with the second beam splitter 14 form an optical bridge through the two fixed reflective surfaces. As long as the installation angles of the two beam splitters are precise, the light beam emitted from the rotating end can be transmitted to the stationary end through this fixed optical bridge, regardless of the angle of the rotating shaft 6, thus achieving uninterrupted, low-loss, and stable transmission of optical signals in the rotating state.

[0033] In this embodiment, to achieve efficient and stable optical path redirection, the second beam splitter 14 and the first beam splitter 9 are preferably arranged at a 45° angle relative to the central axis of the stator housing 4. The optical axis of the first communication optical transceiver component is perpendicular to the rotation center line of the rotation axis 6; the optical axis of the second communication optical transceiver component is also perpendicular to the rotation center line of the rotation axis 6. The light emitted by the first and second communication optical transceivers components can be incident on the corresponding plane mirror at a 45° angle, and the angle between the reflected light and the incident light is 90°. By combining two beam splitters with opposing 45° reflective surfaces, a specific deflection of the light beam in space can be cleverly achieved, allowing it to exit laterally from the rotating side and ultimately be received laterally on the stationary side, resulting in a simple and efficient optical path. The reflective surface of the first beam splitter 9 is arranged opposite to the reflective surface of the second beam splitter 14. During assembly, the angles of the two beam splitters need to be precisely adjusted to ensure that the tilt angles of their reflective surfaces are accurate. Even if the rotating shaft drives the first beam splitter 9 to rotate, the light beam reflected from the first beam splitter 9 will always be directed toward the second beam splitter 14 in the same direction, thus being stably reflected by it. This design does not require high angular positioning accuracy of the rotating shaft, but mainly relies on the static accuracy of the beam splitter installation angle, which greatly reduces the dependence on the accuracy of rotational motion control and the difficulty of installation and adjustment.

[0034] Example 2, based on Example 1, provides a dual-channel fiber optic rotary connector based on a beam splitter, such as... Figure 2 As shown, the first optical communication transceiver assembly is preferably a first fiber optic collimator 10, and the second optical communication transceiver assembly is preferably a second fiber optic collimator 13. Both the first fiber optic collimator 10 and the second fiber optic collimator 13 are standard optical components. The first fiber optic collimator 10 is fixedly mounted on the rotating shaft 6, with its tail end connected to the rotor-end communication fiber, and its front-end output / receiving surface pointing towards the first beam splitter 9. The second fiber optic collimator 13 is fixedly mounted on the stator housing 4, with its tail end connected to the stator-end communication fiber, and its front-end output / receiving surface pointing towards the second beam splitter 14.

[0035] To accommodate different spatial layouts and interface requirements, the second communication optical transceiver assembly may also include a right-angle prism 12 for deflecting the outgoing light from the corresponding fiber collimator by 90 degrees. For example... Figure 1 and Figure 3As shown, the right-angle prism 12 can be positioned at the beam output end of the second fiber collimator 13, either tightly connected to it or fixed with optical adhesive. The cross-section of the right-angle prism 12 is an isosceles right triangle, operating on the principle of total internal reflection: when a beam is incident perpendicularly from one of the right-angle faces and reaches the oblique boundary surface, due to the incident angle being greater than the critical angle for total internal reflection at the glass-air interface, the beam undergoes total internal reflection with an efficiency approaching 100%, and then exits perpendicularly from the other right-angle face, thus precisely achieving a 90° beam direction deflection. By adding this right-angle prism 12 to the end of the second fiber collimator 13, the beam originally emitted parallel to the rotation axis can be deflected to be directed perpendicular to the rotation axis towards the second beam splitter 14. This provides great flexibility for the product's external structural design and the fiber optic interface's exit direction, allowing the product to be better integrated into space-constrained devices or devices with special interface orientations.

[0036] Similar improvements can also be applied to the second communication optical transceiver assembly. The second communication optical transceiver assembly may also include a right-angle prism 12 for deflecting the outgoing light from the corresponding fiber collimator by 90 degrees. For example... Figure 1 and Figure 3 As shown, the right-angle prism 12 is positioned at the beam receiving end of the second fiber collimator 13. The beam reflected from the second beam splitter 14 is first deflected by 90° by the right-angle prism 12 before entering the second fiber collimator 13. This configuration provides an alternative optical path layout compared to the scheme of placing the right-angle prism only at the rotating end. In practical applications, the right-angle prism 12 can be flexibly configured at the rotating end, the stationary end, or both ends, or even not at either end, depending on the specific constraints of the external space and fiber routing at the stator and rotor ends. Figure 2 As shown, this requires the fiber optic collimator to be directly aligned with the side of the beam splitter, which places different demands on the structural design. The main advantage of using a right-angle prism compared to not using one is the flexibility it provides in changing the optical path direction. It decouples the physical orientation of the optical path from the mechanical axis of the product, allowing for the design of irregularly shaped products more suited to specific installation environments. Conversely, the solution without a right-angle prism has a simpler and more direct structure with fewer parts. When space permits and the interface orientation matches, it can reduce costs and potential assembly / adjustment steps.

[0037] It is worth noting that the channel function design of this invention is highly flexible. For example... Figure 4As shown, the channel originally designed for laser transmission can be completely replaced with a separate communication light path according to application requirements. Specifically, the fiber optic rotary connector in this embodiment may further include a third fiber collimator 16 and a fourth fiber collimator 17, which are arranged opposite each other along the rotation center line of the rotation axis 6. Typically, the third fiber collimator 16 is fixedly mounted at the axial center of the end of the rotation axis 6, and the fourth fiber collimator 17 is fixedly mounted on the corresponding end of the stator housing 4. The communication light is emitted from the fourth fiber collimator 17, passes directly through the area where the first beam splitter 9 and the second beam splitter 14 are located along the axial direction, and is received by the opposite third fiber collimator 16 and coupled into the optical fiber. Since this optical path coincides with the rotation axis, the axial direction and spatial position of the beam do not change when the rotation axis 6 rotates, thus achieving extremely stable transmission, which is particularly suitable for laser power transmission with extremely high requirements for directional stability. Therefore, both channels can be communication channels, both laser channels, or one communication and one laser channel. This interchangeability of functions enables the same hardware platform to adapt to diverse signal transmission needs, enhancing the product's versatility and market adaptability, and providing system integrators with more solutions.

[0038] Example 3, based on Example 2, provides a dual-channel fiber optic rotary connector based on a beam splitter. The rotational movement between the stator housing 4 and the rotating shaft 6 is achieved through a bearing assembly 5. The outer ring of the bearing assembly 5 is connected to the inner hole of the stator housing 4 using an interference fit or a transition fit, and the inner ring of the bearing assembly 5 is connected to the outer cylindrical surface of the rotating shaft 6 using a similar fit to ensure concentricity and stability of rotation. To reliably limit the axial movement of the bearing assembly 5 and prevent it from shifting during operation, the stator housing 4 is provided with an outer ring bearing end cap 7 for limiting the outer ring of the bearing assembly 5. The outer ring bearing end cap 7 is typically fixed to the end face of the stator housing 4 by a threaded connection or screws, with its inner edge pressing against the end face of the bearing outer ring. Similarly, the rotating shaft 6 is provided with an inner ring bearing end cap 3 for limiting the inner ring of the bearing assembly 5. The inner ring bearing end cap 3 can be screwed onto the rotating shaft 6, with its stepped surface pressing against the end face of the bearing inner ring. This double-end cap limiting structure ensures that the bearing assembly 5 is firmly fixed in the axial direction and can withstand a certain axial load, thereby ensuring the smooth operation of the rotating shaft 6 when it rotates at high speed or variable speed and is subjected to slight axial force, and further improving the stability of optical signal transmission.

[0039] This embodiment includes a protective structure. The stator housing 4 is provided with a first protective housing 1 to protect the second beam splitter 14 and the second communication optical transceiver assembly (such as the second fiber collimator 13). The first protective housing 1 is typically a metal cover with a light-transmitting hole, which is fastened to the stator housing 4 by screws 2, forming a relatively closed cavity that encapsulates the second beam splitter 14 and the second fiber collimator 13, effectively preventing dust, oil, moisture, and other contaminants from directly contaminating the mirror surface and affecting light transmission and reflection efficiency. Similarly, the rotating shaft 6 is provided with a second protective housing 8 to protect the first beam splitter 9 and the first communication optical transceiver assembly (such as the first fiber collimator 10). The structure of the second protective housing 8 is similar to that of the first protective housing 1, rotating with the rotating shaft 6 to provide dynamic protection for its internal optical components.

[0040] To further secure the fiber optic collimator and provide it with a more precise mounting reference and stress isolation, a second metal sleeve 15 is provided on the first protective housing 1 for limiting the positioning of the second communication optical transceiver assembly. The second metal sleeve 15 can be a precision-machined sleeve that protects the communication optical fiber at the tail of the second fiber optic collimator 13. The second metal sleeve 15 is installed and fixed within specific holes in the first protective housing 1. This design allows for independent pre-calibration of the fiber optic collimator before the entire modular assembly is installed, simplifying the process of field assembly and subsequent maintenance and replacement. Similarly, a first metal sleeve 11 is provided on the second protective housing 8 for limiting the positioning of the first communication optical transceiver assembly, and its function is the same as that of the second metal sleeve 15.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A dual-channel fiber optic rotary connector based on a beam splitter, characterized in that, include: The stator housing (4) is provided with a second communication optical transceiver assembly and a second beam splitter (14) arranged at an angle. A rotating shaft (6) is rotatably disposed inside the stator housing (4). The rotating shaft (6) is provided with a first communication optical transceiver assembly and a first beam splitter (9) arranged at an angle. The reflecting surface of the first beam splitter (9) is arranged opposite to the reflecting surface of the second beam splitter (14); The communication light emitted by the first and second communication optical transceivers forms the first optical signal transmission channel through the reflection paths of the first beam splitter (9) and the second beam splitter (14). The laser beam forms a second optical signal transmission channel through the refraction paths of the first beam splitter (9) and the second beam splitter (14).

2. The dual-channel fiber optic rotary connector based on a beam splitter according to claim 1, characterized in that, The second beam splitter (14) and the first beam splitter (9) are arranged at an angle of 45° relative to the central axis of the stator housing (4).

3. The dual-channel fiber optic rotary connector based on a beam splitter according to claim 2, characterized in that, The optical axis of the first optical transceiver component is perpendicular to the rotation center line of the rotation axis (6); the optical axis of the second optical transceiver component is perpendicular to the rotation center line of the rotation axis (6).

4. The dual-channel fiber optic rotary connector based on a beam splitter according to claim 3, characterized in that, The first optical transceiver component includes a first optical fiber collimator (10), and the second optical transceiver component includes a second optical fiber collimator (13).

5. The dual-channel fiber optic rotary connector based on a beam splitter according to claim 4, characterized in that, The first communication optical transceiver assembly also includes a right-angle prism (12) for deflecting the outgoing light from the corresponding fiber collimator by 90 degrees, the right-angle prism (12) being disposed at the end of the first fiber collimator (10).

6. The dual-channel fiber optic rotary connector based on a beam splitter according to claim 4 or 5, characterized in that, The second communication optical transceiver assembly also includes a right-angle prism (12) for deflecting the outgoing light from the corresponding fiber collimator by 90 degrees, the right-angle prism (12) being disposed at the end of the second fiber collimator (13).

7. The dual-channel fiber optic rotary connector based on a beam splitter according to claim 6, characterized in that, It also includes a third fiber collimator (16) and a fourth fiber collimator (17), which are arranged opposite each other along the rotation center line of the rotation axis (6).

8. The dual-channel fiber optic rotary connector based on a beam splitter according to claim 1 or 7, characterized in that, The stator housing (4) is connected to the rotating shaft (6) via the bearing assembly (5). The outer ring of the bearing assembly (5) is connected to the stator housing (4), and the inner ring of the bearing assembly (5) is connected to the rotating shaft (6). The stator housing (4) is provided with an outer ring bearing end cover (7) for limiting the outer ring of the bearing assembly (5), and the rotating shaft (6) is provided with an inner ring bearing end cover (3) for limiting the inner ring of the bearing assembly (5).

9. The dual-channel fiber optic rotary connector based on a beam splitter according to claim 8, characterized in that, The stator housing (4) is provided with a first protective housing (1) for protecting the second beam splitter (14) and the second communication optical transceiver assembly, and the rotating shaft (6) is provided with a second protective housing (8) for protecting the first beam splitter (9) and the first communication optical transceiver assembly.

10. The dual-channel fiber optic rotary connector based on a beam splitter according to claim 9, characterized in that, The first protective housing (1) is provided with a second metal sleeve (15) for limiting the second communication optical transceiver component, and the second protective housing (8) is provided with a first metal sleeve (11) for limiting the first communication optical transceiver component.

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