A super-multiplex fiber optic rotary joint

Abstract

The application belongs to the technical field of optical fiber rotary connectors, and discloses a super-multi-path optical fiber rotary connector, wherein optical fiber collimators are arranged on input end fixed end covers and output end fixed end covers in a same layer interval type concave-convex staggered form and / or an inner-outer layered form, on the basis of not changing a light aperture d of a dove prism, a fiber collimator adjusting hole d1 and a fiber collimator mounting hole d2, as many paths as possible are increased, the fiber collimator adjusting hole has no intersection, and interference can be avoided, the number of paths is increased through different fixed end cover designs, different arrangements correspond to different adjusting sequences, super-multi-path optical fiber rotary connector design is realized, and the problem of large data transmission in an optical fiber communication system is solved.

Description

Technical Field

[0001] This invention relates primarily to the field of optical fiber rotary connector technology, and in particular to a multi-channel optical fiber rotary connector. Background Technology

[0002] Fiber optic rotary connectors enable 360° rotational transmission of optical signals from a fixed part to a rotating part. With the rapid development of fiber optic communication technology, the application of multi-channel fiber optic rotary connectors is becoming increasingly widespread, and the demand for their number of channels is also increasing. The original 2-channel, 4-channel, and 7-channel connectors are far from meeting the needs. However, increasing the number of channels within a limited optical aperture is difficult to implement and install. For example, although patents 022798714, ZL201020253642X, and ZL2020209630869 disclose methods for implementing multi-channel fiber optic rotary connectors, they all utilize the optical transmission principle of Dowell prisms and couple the fiber optic signals after collimation and expansion using fiber optic collimators. However, none of them provide detailed specifications regarding the specific number of channels.

[0003] Typically, fiber optic collimators are installed on the fixed end caps at both ends of the fiber optic rotary connector. To increase the data volume of the fiber optic transmission system, the number of channels must be increased, and the more fiber optic collimators the better. However, if the fiber optic collimators are installed too densely, light interference will occur.

[0004] Therefore, there is an urgent need for a high-capacity fiber optic rotary connector to solve the problem that the number of channels in a fiber optic transmission system is insufficient to meet the demand for large data volumes. In particular, to maximize the number of channels within the limited aperture of the Daowei prism, it is necessary to arrange the fiber optic collimators reasonably according to their outer diameter to ensure that each fiber optic collimator can be successfully installed, adjusted, and fixed. Summary of the Invention

[0005] To address the aforementioned issues, this invention provides a multi-channel fiber optic rotary connector based on Dowell prisms. By fully utilizing the aperture of the Dowell prism, this connector maximizes the number of channels within a limited aperture. It requires the fiber optic collimators to be arranged rationally according to their outer diameter, effectively increasing the number of channels while ensuring the adjustable and fixed configuration of each collimator. This solves the problem of insufficient channel count in fiber optic transmission systems due to large data volumes.

[0006] To achieve the above objectives, the present invention provides a multi-channel fiber optic rotary connector, including an input fixed end cap, a Dowell prism, and an output fixed end cap. The Dowell prism is disposed between the input and output fixed end caps. Both the input and output fixed end caps are provided with corresponding fiber optic collimator mounting holes and fiber optic collimator installation holes. The fiber optic collimator installation holes are evenly distributed along the circumference and are spaced apart on the outside of the fiber optic collimator installation holes. Both are concentric, and the outer circumferential diameter formed by the multiple fiber optic collimator mounting holes is smaller than the diameter of the Dowell prism's light-passing aperture. The fiber optic collimators are mounted in the fiber optic collimator installation holes in a staggered, concave-convex manner on the same layer.

[0007] The above-mentioned technical solution is Method Two, which involves assembling and adjusting the fiber optic collimators in a staggered, inter-layered manner. This increases the number of collimators as much as possible without changing the aperture diameter d, the adjustment space diameter d1, or the fiber optic collimator mounting hole diameter d2. The adjustment holes of the fiber optic collimators in the same layer are arranged at intervals and do not intersect, thus avoiding interference when multiple fiber optic collimators are arranged in the same layer.

[0008] Furthermore, during installation and adjustment, the concave fiber collimator should be installed and adjusted first, followed by the convex fiber collimator. The end face of the concave fiber collimator should not exceed the end face of the convex fiber collimator.

[0009] The above technical solution is the debugging sequence of Method 2: first adjust the concave fiber collimator, then adjust the convex fiber collimator.

[0010] Furthermore, the output end fixed cover is either an integral end cover or a segmented end cover.

[0011] When using Method 2, the output end cap is a modular cap, which facilitates repair and replacement if the fiber optic collimator on one of the modules is damaged.

[0012] Furthermore, the fiber optic collimator mounting holes are arranged in a circumferential direction and in multiple layers, both inside and outside, on the input and output fixed end caps. The fiber optic collimator adjustment holes are located on the outside of the fiber optic collimator mounting holes. The outer circumferential diameter formed by the outer layer of fiber optic collimator adjustment holes is smaller than the diameter of the Dowell prism's light-passing aperture. The adjacent inner and outer layer fiber optic collimator adjustment holes do not intersect. The fiber optic collimator is installed and adjusted in the fiber optic collimator mounting holes in a layered manner.

[0013] The above-mentioned technical solution is Method 3, which involves assembling and adjusting the fiber optic collimators in a staggered, concave-convex configuration with inner and outer layers. Without changing the aperture diameter d, the adjustment space diameter d1, or the fiber optic collimator mounting hole diameter d2, the number of collimators is increased as much as possible. The adjustment holes d1 of adjacent inner and outer layers of fiber optic collimators do not intersect, and the adjustment holes of fiber optic collimators in the same layer are arranged at intervals and do not intersect. When arranging as many fiber optic collimators as possible, interference can be avoided in the same layer and between inner and outer layers.

[0014] Further fiber collimators are mounted on the input and output fixed end caps in a staggered manner with the inner and outer layers interleaved and spaced apart.

[0015] The above technical solution is one arrangement method in Method 3, namely, the inner and outer layers are staggered and the same layer is staggered at intervals.

[0016] Furthermore, the fiber optic collimator is mounted on the input end cap and the output end cap in a manner where the inner and outer layers are not staggered, or in a manner where the inner and / or outer layers are staggered at intervals within the same layer.

[0017] The above technical solutions are three other arrangement methods of method three, namely (1) the inner layer and the outer layer are not mutually concave and convex, and the inner layer is alternately concave and convex; (2) the inner layer and the outer layer are not mutually concave and convex, and the outer layer is alternately concave and convex; (3) the inner layer and the outer layer are not mutually concave and convex, and the inner layer and the outer layer are alternately concave and convex in the same layer.

[0018] Furthermore, the output end fixing cap is a split end cap, with the output end fixing cap for the inner layer of fiber collimator mounting holes set on one split end cap, and the output end fixing cap for the outer layer of fiber collimator mounting holes set on another split end cap.

[0019] This invention also provides another type of multi-channel fiber optic rotary connector, including an input fixed end cap, a Dowell prism, and an output fixed end cap. The Dowell prism is disposed between the input fixed end cap and the output fixed end cap. Fiber optic collimator mounting holes are evenly distributed along the circumferential direction on the input and output fixed end caps in a multi-layered manner. Fiber optic collimator mounting holes are located within the fiber optic collimator mounting holes and are concentric. The outer circumferential diameter formed by the outer layer of fiber optic collimator mounting holes is smaller than the diameter of the Dowell prism's light-passing aperture. Adjacent inner and outer layer fiber optic collimator mounting holes do not intersect. The fiber optic collimators are mounted and adjusted in the fiber optic collimator mounting holes in a layered manner.

[0020] The above technical solution is Method 3. The fiber collimator is assembled and adjusted in an inner and outer layer. Without changing the light-transmitting aperture d, the assembly and adjustment space diameter d1, and the fiber collimator mounting hole diameter d2, the number of channels is increased as much as possible. The assembly and adjustment holes of adjacent inner and outer fiber collimators do not intersect, which can ensure that there is no interference between the inner and outer layers.

[0021] Furthermore, the fiber optic collimators are arranged in an inner and outer layered manner on the fixed end cap at the input end, and in an inner and outer layered manner on the fixed end cap at the output end, with the inner and outer layers staggered. During installation and adjustment, the inner layer fiber optic collimators are installed and adjusted first, followed by the outer layer fiber optic collimators.

[0022] In the above technical solution, the fiber optic collimator at the input end adopts an inner and outer double-layer arrangement, and the fiber optic collimator at the output end adopts an inner and outer layer with staggered concave and convex shapes. The inner and outer layers are arranged with height difference in mind. When installing and fixing, the inner fiber optic collimator should be adjusted first, and then the outer layer should be adjusted to ensure the installation and adjustment space. When installing and adjusting the outer layer, the fiber optic collimator clamping device will not interfere with the inner fiber optic collimator.

[0023] Furthermore, the output end cap is a segmented end cap, with each segmented end cap containing an inner fiber collimator mounting hole and an outer fiber collimator mounting hole.

[0024] In the above technical solution, the fixed end cover of the output end is arranged in blocks and groups. This structure can be grouped according to the number of channels and space size, so that only the damaged part can be repaired or replaced when it is damaged.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] This invention provides a multi-channel fiber optic rotary connector that increases the number of channels without changing the aperture, fiber collimator size, or assembly system. Different fixed end cap designs correspond to different assembly sequences, realizing a multi-channel fiber optic rotary connector design. This solves the problem that fiber optic communication systems with large data transmission volumes often have too few channels, failing to meet the system requirements. Some systems also do not need to use wavelength division multiplexing (WDM) technology to reduce the number of channels, thus reducing the amount of system equipment and lowering costs.

[0027] In the first method of the present invention, the input fiber collimator adopts an inner and outer double-layer arrangement, and the output end adopts an inner and outer layer with staggered concave and convex shapes, and the end caps are arranged in separate groups. This structure can be grouped and separated according to the number of channels and space size, and is not limited to the structure shown in the figure. In addition, this structure example has two layers, but is not limited to two layers. The debugging sequence of this method is to adjust the inner layer first and then the outer layer.

[0028] In the second method of the present invention, the input fiber collimator adopts a high-low staggered layer arrangement, and the output end can be reasonably arranged with fixed end caps according to the ratio of d, d1, d2. It can be separate or as a whole. The debugging sequence of this method is to adjust the concave layer first and then the convex layer.

[0029] Method 3 of the present invention combines Method 1 and Method 2. The output end fixed end cap is stacked and installed. The outer fixed end cap installed later has fiber optic cable routing holes for the inner fiber optic collimator. This method is not limited to two layers. Multiple layers can be stacked and arranged according to the diameter of the through hole. When debugging this method, first adjust the outer concave layer, then adjust the outer convex layer, and then adjust the inner layer. Attached Figure Description

[0030] Figure 1 A cross-sectional view of a multi-channel fiber optic rotary connector;

[0031] Figure 2 This is a schematic diagram showing the relationship between the light-transmitting aperture, clamping dimensions, and fiber collimator mounting holes of the present invention.

[0032] Figure 3 This is a schematic diagram of the theoretical arrangement of the fiber collimator under normal conditions according to the present invention;

[0033] in: Figure 3 (a) is a schematic diagram of the arrangement of the fiber optic collimator on the fixed end cap at the input end; Figure 3 (b) is a schematic diagram of the arrangement of the fiber optic collimator on the fixed end cap at the output end;

[0034] Figure 4 This is a schematic diagram of the theoretical layout using Method 1 of the present invention;

[0035] Figure 5 This is a schematic diagram showing the arrangement of the fiber optic collimator in Method 1 of the present invention on the fixed end cap at the input end;

[0036] in: Figure 5 (a) is a schematic diagram of the input end cap without an optical fiber collimator installed; Figure 5 (b) is a schematic diagram of the fiber optic collimator installed on the fixed end cap of the input end;

[0037] Figure 6 This is a schematic diagram showing the arrangement of the fiber optic collimator of Method 1 on the fixed end cap at the output end of the present invention;

[0038] in: Figure 6 (a) is a schematic diagram of the fixed end cap of the output end without the fiber optic collimator installed; Figure 6 (b) is a schematic diagram of the fiber optic collimator installed on the fixed end cap of the output end;

[0039] Figure 7 This is a schematic diagram of the theoretical layout using method two in this invention;

[0040] Figure 8 This is a schematic diagram showing the arrangement of the fiber optic collimator using method two on the fixed end cap at the input end of the present invention;

[0041] in: Figure 8 (a) is a schematic diagram of the input end cap without an optical fiber collimator installed; Figure 8 (b) is a schematic diagram of the fiber optic collimator installed on the fixed end cap of the input end;

[0042] Figure 9 This is a schematic diagram showing the arrangement of the fiber optic collimator using method two on the fixed end cap at the output end of the present invention;

[0043] in: Figure 9 (a) is a schematic diagram of the fixed end cap of the output end without the fiber optic collimator installed; Figure 9 (b) is a schematic diagram of the fiber optic collimator installed on the fixed end cap of the output end;

[0044] Figure 10 This is a schematic diagram of the output end fixing cap being a split type, with each output end fixing cap block having an intermittent concave-convex structure when using method two of the present invention.

[0045] Figure 11 This is a schematic diagram of the theoretical layout of method three in this invention;

[0046] Figure 12 This is a schematic diagram showing the arrangement of the fiber optic collimator using method three on the fixed end cap at the input end of the present invention;

[0047] in: Figure 12 (a) is a schematic diagram of the input end cap without an optical fiber collimator installed; Figure 12 (b) is a schematic diagram showing the fiber optic collimator installed on the fixed end cap of the input end;

[0048] Figure 13 This is a schematic diagram showing the arrangement of the fiber optic collimator of method three on the fixed end cap at the output end of the present invention;

[0049] in: Figure 13 (a) is a schematic diagram of the fixed end cap of the output end without the fiber optic collimator installed; Figure 13 (b) is a schematic diagram of the fiber optic collimator installed on the fixed end cap of the output end;

[0050] The components include: 1. Fiber optic collimator; 2. Input end cap; 3. Transmission mechanism; 4. Output end cap; 5. Daowei prism; 6. Prism sleeve.

[0051] 7. Inner fiber collimator; 8. Outer fiber collimator; 9. Concave fiber collimator; 10. Convex fiber collimator;

[0052] d, Dowell prism light passage hole; d1, fiber optic collimator mounting hole; d2, fiber optic collimator mounting hole. Detailed Implementation

[0053] The preferred mechanism and method of motion implementation of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0054] To better illustrate the technical solution of this invention, the basic structure of a fiber optic rotary connector will be introduced using ZL2020209630869, a type of ultra-multi-channel fiber optic rotary connector, as an example. Figure 1 As shown, a multi-channel fiber optic rotary connector includes a fiber optic output assembly (rotating end of the connector), a fiber optic input assembly (fixed end of the connector), a transmission mechanism 3, and a prism assembly. The fiber optic output assembly and the fiber optic input assembly are respectively disposed at both ends of the multi-channel fiber optic rotary connector, and are both formed by setting fiber optic collimators on the input end fixed end cover 2 or the output end fixed end cover 4. The prism assembly is located between the fiber optic output end and the fiber optic input end. The prism assembly includes a Daowei prism 5 and a prism sleeve 6. The Daowei prism 5 is glued inside the prism sleeve 6. The transmission mechanism 3 is disposed between the fiber optic output assembly and the fiber optic input assembly to realize the rotational connection between the two.

[0055] The input end fixed end cap 2 and the output end fixed end cap 4 are provided with a number of fiber optic collimator mounting holes. The fiber optic collimators are glued in the fiber optic collimator mounting holes. However, when assembling and adjusting the fiber optic collimator, it is usually not possible to directly install it in the fixed hole for mechanical positioning. Instead, it needs to be clamped by a clamp. Therefore, the installation and fixing of the fiber optic collimator requires adjustment. It is necessary to consider not only the adjustment gap between the fiber optic collimator and the mounting hole, but also the installation and adjustment space of the adjustment equipment, i.e., the clamp, to avoid interference during the adjustment.

[0056] like Figure 2 As shown, Figure 2 In the diagram, d represents the light-passing aperture of the Dowell prism, d1 represents the installation and adjustment hole of the fiber optic collimator (i.e., the installation and adjustment space for the fiber optic collimator, including clamping and tilting space), and d2 represents the mounting hole of the fiber optic collimator. The diameter of the fiber optic collimator is generally 1.3mm, 1.8mm, or 3.2mm, with d2 having a slightly larger diameter than the fiber optic collimator. d1 and d2 are concentric. After adopting the installation method described in CN113376755B for the installation and adjustment device and method of multi-channel fiber optic rotary connectors, the fiber optic collimator is glued and fixed to the input end fixing cap 2 and the output end fixing cap 4.

[0057] Normally, fiber optic collimators are arranged circumferentially on the input end cap 2 or the output end cap 4, such as... Figure 3 As shown, the dashed line represents d1, which is the clamping dimension of the fiber optic collimator, and the solid line represents d2, which is the mounting hole of the fiber optic collimator. Figure 3 (a) shows the arrangement of the fiber optic collimator with the fixed end cap at the input end. Its center is not hollowed out. Because the output fiber optic collimator requires a large adjustment angle and needs to locate the light spot during coupling, the center of the corresponding fixed end cap of the output collimator is generally hollow, i.e., as shown in the image. Figure 3 As shown in (b), the center of the fixed end cap at the output end is hollow, and the mounting hole for the fiber optic collimator is a semi-circular hole. This arrangement will not cause interference during installation and adjustment. Utilizing the maximum outer diameter of the light-transmitting aperture, installation and adjustment are convenient. Figure 3 The proportions shown can accommodate a maximum of 16 fiber optic cables. (The arrangement may vary depending on the actual dimensions of d, d1, and d2.) Figure 3 (The 16 channels in the prism.) Without changing the diameter d of the Dowell prism's aperture, the following methods can be considered to increase the number of channels:

[0058] Method 1: To avoid interference, fiber optic collimators can be arranged in an inner and outer layered configuration, such as... Figure 4-6 As shown.

[0059] The number of inner and outer layers can be determined according to the actual size and requirements, such as... Figure 4 As shown, it can be divided into two layers (actually, it may not be limited to two layers). The inner ring is the inner fiber collimator 7, and the outer ring is the outer fiber collimator 8.

[0060] like Figure 5 and Figure 6 The diagram shows the arrangement of fiber optic collimators in an inner and outer layer on the input end cap and the output end cap, respectively.

[0061] Both the input and output fixed end caps can adopt an integral end cap structure. For ease of maintenance and adjustment, a modular structure can also be used. Taking the output fixed end cap as an example... Figure 6 (a) and Figure 6 As shown in (b), the output end cap is divided into 8 relatively independent sections, each containing mounting holes for both the inner and outer fiber optic collimators. When a fiber optic collimator on a particular section needs to be replaced, only the damaged section needs to be replaced. This modular structure is suitable for situations where the aperture diameter d is relatively large and the internal utilization rate is low.

[0062] To better avoid interference, the input and output fixed end caps, while featuring a modular arrangement of inner and outer layers, can also be configured with one concave layer and another convex layer. Each block contains both an inner and outer layer, with the inner and outer layers arranged in a staggered manner at relative heights. Figure 6As shown in (b), each piece has an inner layer of concave fiber collimator 9 and an outer layer of convex fiber collimator 10. The term "concave" and "convex" refer to the fact that after installation and adjustment, the end face of the concave fiber collimator 9 does not exceed the end face of the convex fiber collimator 10. The advantage of this arrangement is that the inner and outer layers are arranged considering the height difference. During installation and adjustment, the inner layer fiber collimator needs to be adjusted first, followed by the outer layer, ensuring sufficient space for adjustment. Furthermore, during the installation and adjustment of the outer layer, the fiber collimator clamping device will not interfere with the inner layer fiber collimator.

[0063] Method 1, without changing the aperture diameter d, the installation and adjustment space diameter d1, and the fiber optic collimator mounting hole diameter d2, can increase the number of fiber optic collimators from... Figure 3 The 16-way increase shown Figure 4-6 The diagram shows 24 channels. (The arrangement may vary depending on the actual dimensions of d, d1, and d2, and is not limited to this.) Figure 4-6 Route 24 shown. )

[0064] Method 2: To avoid interference, the fiber optic collimators are arranged in a staggered, concave-convex configuration on the same layer, such as... Figure 7-10 As shown, the term "concave-convex" here refers to the fact that after the fiber collimator is assembled and adjusted, the end face of the concave fiber collimator 9 does not exceed the end face of the convex fiber collimator 10.

[0065] like Figure 7 The diagram shows a theoretical arrangement of staggered concave and convex optical fiber collimators on the same layer. The dashed lines represent the d1 interval arrangement, which represents the adjustment holes of the same concave or convex optical fiber collimators. The interval arrangement ensures that the same concave or convex optical fiber collimators will not interfere with each other, and adjacent concave and convex optical fiber collimators will also not interfere with each other. Therefore, using this method two, without changing the light passage d of the Dowell prism, the adjustment hole d1 of the optical fiber collimator, and the mounting hole d2 of the optical fiber collimator, the number of optical fiber collimators can be increased from... Figure 3 The 16-way increase shown Figure 7-9 The diagram shows 24 channels. (The arrangement may vary depending on the actual dimensions of d, d1, and d2, and is not limited to this.) Figure 4-6 (As shown in the 24-channel example.) Although this arrangement does not utilize the center hole, it can still increase the number of channels.

[0066] The fiber optic collimators are arranged in a staggered, recessed pattern on the fixed end cap at the input end, such as... Figure 8 As shown, during installation and adjustment, the concave fiber collimator 9 is installed and adjusted first, and then the convex fiber collimator 10 is adjusted. This ensures that after the concave fiber collimator 9 is fixed, its end face does not exceed the end face of the convex fiber collimator 10. In this way, the convex fiber collimator 10 will not interfere with the concave fiber collimator 9 during installation and adjustment.

[0067] The arrangement of the fiber optic collimator on the fixed end cap at the output end is as follows: Figure 9As shown, the same layer of staggered concave-convex optical fiber collimator is used for assembly and adjustment. During assembly and adjustment, the concave optical fiber collimator 9 is adjusted first, followed by the convex optical fiber collimator 10.

[0068] This method allows for a large aperture and a high number of optical paths, and the output end cap can be a single, integral structure. However, if the installation and adjustment space diameter d1 and the fiber optic collimator mounting hole diameter d2 remain unchanged, but the aperture d decreases, a segmented end cap structure can be used, with each end cap block employing an alternating concave-convex structure, as shown in the attached diagram. Figure 10 As shown, each fiber optic collimator can be fixed individually, facilitating installation, adjustment, and maintenance. This method is particularly advantageous for increasing the number of channels in multi-channel fiber optic rotary connectors with relatively small aperture diameters (d). When the aperture diameter (d) is small and there is insufficient space in the inner layer to accommodate another layer of fiber optic collimator mounting holes, a split-type concave-convex end cap structure can be used to increase the number of channels.

[0069] Method 3: The fiber optic collimator is arranged using a combination of methods 1 and 2, such as... Figure 11-13 As shown.

[0070] like Figure 11 The diagram shown illustrates one form of a theoretical combination of Method 1 and Method 2. The outer layer employs the same-layer, intermittently staggered concave-convex structure found in Method 2, while the inner layer does not use this structure. Figure 3 Compared to the 16-way shown, Figure 11 Increase to 32 channels. (The arrangement can be based on the actual dimensions of d, d1, and d2, and may not be limited to this.) Figure 11 (As shown in the 32-channel diagram.) Of course, if the inner layer also uses a staggered combination of concave and convex surfaces, the number of channels can be increased even further.

[0071] like Figure 12 The diagram shows the arrangement of the fixed end cap at the input end of the fiber optic collimator. The outer layer uses a staggered, concave-convex structure with interleaved sections, while the inner layer is arranged on the convex structure. This is a combination of methods one and two; other forms can be used, such as a staggered inner layer.

[0072] like Figure 13The diagram shows the arrangement of the output end cap of the fiber optic collimator. The output end cap uses a split structure. The outer layer is arranged in Method 2 with a staggered, concave-convex structure to expand the number of paths. Then, an inner output end cap is added to secure the fiber optic collimator on the inner layer. The inner end cap covers the outer fiber optic collimator and has fiber optic routing holes corresponding to those on the outer collimator. During outer layer adjustment, the concave fiber optic collimator is adjusted first, followed by the convex fiber optic collimator. The fiber optic connector is then cut, and the fiber is passed through the routing holes in the inner end cap before adjusting the inner fiber optic collimator. This arrangement has extremely high utilization of the aperture, effectively increasing the number of paths. Furthermore, it is not limited to the two-layer stacking shown in the example; multiple layers can be stacked depending on the aperture size.

[0073] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. However, 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. An ultra-multiplex fiber optic rotary joint comprising an input end fixed end cap (2), a dove prism (5) and an output end fixed end cap (4), the dove prism (5) being disposed between the input end fixed end cap (2) and the output end fixed end cap (4), characterized in that, Both the input end cap (2) and the output end cap (4) are provided with corresponding fiber optic collimator mounting holes (d1) and fiber optic collimator installation holes (d2). The fiber optic collimator installation holes (d2) are evenly distributed along the circumference. The fiber optic collimator mounting holes (d1) are spaced apart on the outside of the fiber optic collimator installation holes (d2). Both are concentric. The outer circumferential diameter formed by multiple fiber optic collimator mounting holes (d1) is smaller than the diameter of the light-passing aperture (d) of the Dowell prism. The fiber collimator (1) is installed in the fiber collimator mounting hole (d2) in a staggered concave-convex form with the same layer spacing. The fiber collimator (1) installed in the concave position is the concave fiber collimator (9), and the fiber collimator (1) installed in the convex position is the convex fiber collimator (10). During installation and adjustment, the concave fiber collimator (9) is installed and adjusted first, and then the convex fiber collimator (10) is installed and adjusted. The end face of the concave fiber collimator (9) is lower than the end face of the convex fiber collimator (10).

2. A multi-fiber rotary joint according to claim 1, wherein, The output end fixed end cover (4) is an integral end cover or a segmented end cover.

3. A multi-fiber rotary joint according to claim 1, wherein, The fiber optic collimator mounting holes (d2) are arranged in a circumferential direction and in an inner and outer multi-layered manner on the input end fixed end cap (2) and the output end fixed end cap (4). The fiber optic collimator adjustment holes (d1) are located outside the fiber optic collimator mounting holes (d2). The outer circumferential diameter formed by the outer layer of fiber optic collimator adjustment holes (d1) is smaller than the diameter of the Dowell prism light-passing hole (d). The adjacent inner and outer layer fiber optic collimator adjustment holes (d1) do not intersect. The fiber optic collimator (1) is installed and adjusted in the fiber optic collimator mounting holes (d2) in an inner and outer layered manner.

4. A multi-fiber rotary joint according to claim 3, wherein, The fiber collimator (1) is mounted on the input end fixed cover (2) and the output end fixed cover (4) in a staggered manner with the inner and outer layers being intermittently staggered.

5. A multi-fiber rotary joint according to claim 3, wherein, The fiber collimator (1) is mounted on the input end fixed cover (2) and the output end fixed cover (4) in a form where the inner and outer layers are not staggered, or the inner and / or outer layers are staggered in a form where they are spaced apart.

6. A multi-fiber rotary joint according to claim 3, wherein, The output end fixing cap (4) is a split end cap. The output end fixing cap (4) with the inner layer fiber collimator mounting hole (d2) is set on one split end cap, and the output end fixing cap (4) with the outer layer fiber collimator mounting hole (d2) is set on another split end cap.

7. A multi-channel fiber optic rotary connector, comprising an input end cap (2), a Dowell prism (5), and an output end cap (4), wherein the Dowell prism (5) is disposed between the input end cap (2) and the output end cap (4), characterized in that, The input end cap (2) and the output end cap (4) are equipped with fiber optic collimator mounting holes (d1) evenly distributed along the circumferential direction in a multi-layered manner. The fiber optic collimator mounting holes (d2) are located inside the fiber optic collimator mounting holes (d1) and are concentric. The outer circumferential diameter formed by the outer layer of fiber optic collimator mounting holes (d1) is smaller than the diameter of the Dowell prism aperture (d). The adjacent inner and outer layer fiber optic collimator mounting holes (d1) do not intersect. The fiber optic collimator (1) adopts... The fiber collimators (1) are installed in the mounting holes (d2) of the fiber collimators in an inner and outer layered manner. The fiber collimators (1) are arranged in an inner and outer layered manner on the input end fixed end cap (2) and in an inner and outer layered manner on the output end fixed end cap (4), with the inner and outer layers staggered. When installing, the inner layer fiber collimators are installed first, and then the outer layer fiber collimators are installed. The end face of the fiber collimator (1) installed in the concave position is lower than the end face of the fiber collimator (1) installed in the convex position.

8. A multi-fiber rotary joint according to claim 7, wherein, The output end cap (4) is a segmented end cap, and each segmented end cap includes an inner fiber collimator mounting hole (d2) and an outer fiber collimator mounting hole (d2).

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