Axial positive and negative rotation fiber optic light source transmission repeater

Abstract

The utility model discloses an axial positive and negative rotation optical fiber light source transmission repeater belongs to signal transmission technical field, this repeater includes the repeater casing, and the upper and lower both ends of repeater casing are all assembled with end sleeve, and the end sleeve tail end inserts the optical fiber sheath, and the optical fiber coaxial insertion of optical fiber sheath is in the repeater casing, and the tail portion of end sleeve is provided with the wedge tail sleeve of annular structure, and the recess is centrally arranged on the wedge tail sleeve, and the recess is built -in compression bearing, and compression bearing sleeve is connected on the optical fiber sheath and is closely connected with it, and the outer wall of wedge tail sleeve is engraved with the thread, and the wedge tail sleeve is connected with locking nut through the thread, and the optical relay assembly is centrally equipped in the repeater main part. In the utility model, the deep groove ball bearing is built -in in the mounting groove of both ends of repeater casing, can fixed sleeve connection in the end of optical fiber sheath, guarantees the coaxial degree of optical fiber sheath and optical relay assembly, thereby under the rotation condition of continuous high speed and can positive and negative switch, keeps the optical path coaxial, reduces the insertion loss.

Description

Technical Field

[0001] This utility model belongs to the field of signal transmission technology, specifically relating to an axially rotating optical fiber light source transmission repeater. Background Technology

[0002] With the development of advanced manufacturing, materials science and testing and characterization technologies, experimental and engineering scenarios in fields such as nanomaterials and aerospace materials require illumination, photoinduced reactions or spectral detection of the test object under centrifugal / rotational conditions. The core requirement is to reliably transmit an external stable light source to the rotating end, or transmit it back from the rotating end to the detection system, and ensure coaxial optical path, stable coupling efficiency and low insertion loss under high-speed, forward and reverse switching rotation conditions.

[0003] Current mainstream solutions have significant shortcomings: First, free-space prism / mirror group transmission relies on high-precision assembly and surface shape, resulting in high volume and cost. High-speed rotation is prone to orientation drift and is sensitive to dust and oil mist. Second, direct fiber winding / winding leads to the fiber, which has a simple structure but the fiber is susceptible to torsional loads and bending fatigue, and does not support long-term forward and reverse operation. Third, conventional single-bearing fiber optic rotary joints have coupling efficiency that fluctuates with rotational speed and vibration, resulting in poor adaptability. Reliability and lifespan are limited under high g or frequent forward and reverse switching.

[0004] Existing technologies generally face problems such as high dependence on processing and assembly precision, large loss and power fluctuations, insufficient reliability in forward and reverse / high speed, high maintenance costs, and limited adaptability. They cannot meet the long-term stable and low-loss light source transmission requirements under strong centrifugal and continuous vibration environments. Therefore, there is an urgent need to develop fiber optic light source transmission repeaters that are simple in structure, coaxially stable, support continuous forward and reverse axial rotation, have friendly processing tolerance, are easy to maintain, and are modularly adaptable to different optical fibers and bands. Summary of the Invention

[0005] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0006] To address the problems mentioned in the background section, the present invention adopts the following technical solution.

[0007] An axially rotating optical fiber light source transmission repeater includes a repeater housing. End sleeves are fitted at both the top and bottom of the repeater housing. Optical fiber sheaths are inserted into the ends of the end sleeves. Optical fibers within the sheaths are coaxially inserted into the repeater housing. A wedge-shaped tail sleeve with an annular structure is provided at the tail of the end sleeve, with a centrally located groove on the wedge-shaped tail sleeve. A clamping bearing is built into the groove and fitted onto and tightly connected to the optical fiber sheath. Threads are engraved on the outer wall of the wedge-shaped tail sleeve, and a locking nut is connected to the wedge-shaped tail sleeve via these threads. An optical repeater assembly is centrally located within the repeater housing. The end of an optical fiber inserted into the repeater housing is coaxial with the optical repeater assembly. Optical signals emitted from the optical fiber of one sheath are diffused into the optical fiber of the other sheath through the optical repeater assembly.

[0008] Preferably, a relay cavity is centrally located inside the repeater housing, and an optical relay assembly is installed inside the relay cavity. The optical relay assembly includes at least one of the following: a specular reflective coating, a lens group for collimating or focusing the light beam, and a short-segment fiber optic sheath.

[0009] Preferably, the repeater housing is cylindrical in shape, with the repeater cavity extending through the center of the housing. A flange is provided at the end of the repeater housing, and a flange is also provided at the connection point between the end sleeve and the repeater housing. When the end sleeve is assembled with the repeater housing, a sealing ring is provided between the two flanges.

[0010] Preferably, the repeater housing has inwardly opening mounting grooves at both ends, and deep groove ball bearings are built into the mounting grooves. When the fiber optic sheath is inserted into the repeater housing, the deep groove ball bearings are fixedly sleeved on the end of the fiber optic sheath to ensure the coaxiality of the fiber optic sheath and the optical repeater assembly.

[0011] Preferably, multiple spacer rings are provided at the connection between the relay cavity and the mounting slot, and spacer rings of different diameters are matched to the coupling requirements of different fiber core diameters or numerical apertures.

[0012] Preferably, the two ends of the repeater housing are also provided with stress relief clamps or cable sealing joints to provide tension relief and bending radius limitation for the fiber optic sheath entering the housing.

[0013] Preferably, the outer diameter of the wedge-shaped tail sleeve is larger than the inner diameter of the locking nut. When the locking nut is threaded onto the wedge-shaped tail sleeve, the locking nut constrains the wedge-shaped tail sleeve, thereby causing the wedge-shaped tail sleeve to press tightly against the bearing.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: (1) The mounting grooves at both ends of the repeater housing of this utility model have built-in deep groove ball bearings, which can be fixedly sleeved on the ends of the optical fiber sheath to ensure the coaxiality of the optical fiber sheath and the optical repeater assembly. Thus, under continuous high-speed and forward / reverse switching rotation conditions, the optical path remains coaxial, reducing insertion loss and ensuring stable transmission of optical signals. In addition, multiple spacer rings of different diameters are set at the connection between the repeater cavity and the mounting groove, which can match the coupling requirements of different optical fiber core diameters or numerical apertures. It is friendly to processing tolerance, reduces the dependence on processing and assembly accuracy, and helps to reduce costs and improve production efficiency. Furthermore, the structural design of this repeater can adapt to the working requirements of continuous forward and reverse rotation in the axial direction, overcome the defects of some solutions in the prior art that do not support long-term forward and reverse alternating work, and can meet the optical signal transmission needs in more complex rotation scenarios.

[0015] (2) The mirror reflection coating and lens group in the optical relay component of this utility model can collimate and focus the beam, so that the optical signal can be transmitted better between optical fibers, improve coupling efficiency, reduce power jitter, and enhance reliability in strong centrifugal and continuous vibration environments. Compared with the free space prism transmission scheme, it reduces the dependence on precision optical components and complex assembly and adjustment, has a smaller size, and can be modularly adapted to different optical fibers and bands, which can meet the needs of various experimental and engineering scenarios and broaden the application range of the equipment.

[0016] (3) The present invention adopts a structure of wedge-shaped tail sleeve, clamping bearing and locking nut, which facilitates the installation and disassembly of optical fiber sheath. When the optical fiber has a problem, it can be maintained and replaced more conveniently. At the same time, the stress relief clamp or cable sealing joint can provide tension relief and bending radius limitation for the optical fiber sheath, reduce the risk of optical fiber damage due to stress, and further reduce maintenance costs. Attached Figure Description

[0017] Figure 1 This is a perspective view of the axially rotating optical fiber light source transmission repeater of this utility model.

[0018] Figure 2 This is a cross-sectional view of the axially rotating optical fiber light source transmission repeater of this utility model.

[0019] Figure 3 This is an exploded view of the axially rotating optical fiber light source transmission repeater of this utility model.

[0020] Figure 4 This is an exploded cross-sectional view of the axially rotating optical fiber light source transmission repeater of this utility model.

[0021] Figure 5 This is a structural diagram of the middle sleeve of this utility model.

[0022] The correspondence between the labels and component names in the attached figures is as follows: 101. Repeater housing; 101a. Optical repeater assembly; 102. End sleeve; 102a. Wedge-shaped tail sleeve; 103. Locking nut; 103a. Pressure bearing; 104. Fiber optic sheath. Detailed Implementation

[0023] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0024] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0025] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments. The present invention provides the following embodiments.

[0026] See Figure 1-2 This is a structural diagram of an axially rotating fiber optic light source transmission repeater in this embodiment. The repeater aims to achieve stable optical transmission under strong centrifugal force, high rotation speed, and forward / reverse switching scenarios. The components are highly coordinated in structural design and assembly logic. Specific implementation details are as follows: The repeater housing 101 is the core load-bearing structure and is cylindrical in shape. A repeater cavity is axially oriented at its center. The inner diameter of this cavity is designed to fit the specifications of the optical repeater component 101a, ensuring no radial offset space after installation. The optical repeater component 101a serves as the core unit for optical signal transmission, and its specific selection can be flexibly configured according to the actual application scenario. To improve the directional transmission efficiency of the optical signal, [further details can be added]. The system employs a combination structure of "mirror reflection coating + lens group". The mirror reflection coating is made of a high-reflectivity metal coating or dielectric film, applied to a designated area on the inner wall of the repeater cavity to achieve precise refraction of the optical signal. The lens group consists of 1-2 aspherical lenses, corresponding to the output and input ends of the optical fibers on both sides, respectively, to collimate the output light and focus the input light, significantly reducing losses caused by beam divergence. If it is necessary to accommodate the docking requirements of different specifications of optical fibers, a short section of the docking fiber sheath can be added in the repeater cavity. The inner wall of the sheath is smoothed, and a small gap is reserved at both ends where it docks with the optical fiber to avoid wear caused by direct contact between the optical fibers, while ensuring efficient transmission of the optical signal.

[0027] See Figure 3 and Figure 4 In this embodiment, both ends of the repeater housing 101 are recessed inward to form annular mounting grooves. The inner diameter of the mounting grooves precisely matches the outer diameter of the deep groove ball bearing. The outer ring of the bearing is fixed in the mounting groove by an interference fit, while the inner ring is connected to the end of the fiber optic sheath 104 by a transition fit. This ensures that the fiber optic sheath 104 remains coaxial with the optical repeater assembly 101a during rotation, effectively avoiding coupling efficiency fluctuations caused by eccentricity. At the connection between the repeater cavity and the mounting groove, 3-5 spacer rings of different diameters are spaced axially. The spacer rings are made of polytetrafluoroethylene (PTFE). Made of PVC, the repeater housing 101 can be assembled with the appropriate spacer ring selected according to the specifications of the access fiber, eliminating the need for secondary processing and significantly improving equipment compatibility. The end sleeve 102 serves as a transition between the fiber sheath 104 and the repeater housing 101. One end of the end sleeve connects to the end of the repeater housing 101 via a flange. The flange contact surfaces are all flattened, and a nitrile rubber sealing ring is installed between the two flanges to effectively prevent external dust and oil mist from entering the repeater cavity, protecting the optical repeater assembly 101a from contamination. (See reference...) Figure 5 In this embodiment, the other end of the end sleeve 102 is integrally formed with an annular wedge-shaped tail sleeve 102a. The outer wall of the wedge-shaped tail sleeve 102a is machined with external threads, and the inner wall has an annular groove in the center. The depth and width of the groove are adapted to the thickness and outer diameter of the clamping bearing 103a, respectively. The inner ring of the clamping bearing 103a is tightly fitted onto the optical fiber sheath 104, and the outer ring is embedded in the groove of the wedge-shaped tail sleeve 102a. The inner diameter of the locking nut 103 is slightly smaller than that of the wedge-shaped tail sleeve 102a. The maximum outer diameter has an internal thread on its inner wall that matches the wedge-shaped tail sleeve 102a. When the locking nut 103 is tightened along the thread, it will generate axial pressure on the wedge-shaped surface of the wedge-shaped tail sleeve 102a, forcing the wedge-shaped tail sleeve 102a to contract inward, thereby driving the clamping bearing 103a to form a uniform clamping force on the optical fiber sheath 104. The clamping force can be adjusted by the tightening degree, which ensures that the optical fiber sheath 104 does not move axially and avoids excessive clamping that could cause the sheath to deform.

[0028] It is worth noting that stress relief clamps or cable sealing connectors are respectively installed on the outer sides of both ends of the repeater housing 101 in this embodiment. If the optical fiber needs to withstand a certain tension in the application scenario, a stress relief clamp is selected. The clamp is fixed to the housing with bolts, and the internal elastic claws can tightly wrap the optical fiber sheath 104, dispersing the external tension to the housing and preventing the tension from being transmitted to the inside of the optical fiber and causing fiber breakage. If there is a risk of liquid splashing in the application environment, a cable sealing connector is selected. The sealing element of the connector is made of silicone rubber, which fits tightly with the optical fiber sheath 104 to achieve IP65-level waterproof sealing. At the same time, both the stress relief clamp and the cable sealing connector limit the bending radius of the optical fiber sheath 104 to ensure that the bending radius is not less than the outer diameter of the optical fiber sheath 104, preventing the increase of micro-bending loss due to excessive bending.

[0029] In summary, during actual use, when an external light source is transmitted through one optical fiber, the optical signal enters the repeater housing 101 through the optical fiber sheath 104. It is first collimated, reflected, or processed by the optical repeater component 101a, and then accurately transmitted to the optical fiber in the other optical fiber sheath 104, and finally transmitted to the detection equipment or experimental object at the rotating end. Even in high-speed rotation scenarios or when frequent forward and reverse switching is performed, the deep groove ball bearing can ensure the stable rotation of the optical fiber sheath 104, and the cooperation between the clamping bearing 103a and the locking nut 103 can prevent the axial displacement of the optical fiber sheath 104. The overall structure can achieve long-term stable transmission, with insertion loss controlled within 0.5dB and small power fluctuation amplitude.

[0030] The above description, in conjunction with specific embodiments, provides a further detailed explanation of the present utility model. It should not be construed that the specific implementation of the present utility model is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present utility model, and all such deductions or substitutions should be considered to fall within the scope of protection defined by the claims submitted by the present utility model.

Claims

1. An axially rotating optical fiber light source transmission repeater, comprising a repeater housing (101), wherein end sleeves (102) are fitted at both the upper and lower ends of the repeater housing (101), and an optical fiber sheath (104) is inserted into the end of the end sleeve (102), wherein an optical fiber inside the optical fiber sheath (104) is coaxially inserted into the repeater housing (101), characterized in that: The end sleeve (102) is provided with a wedge-shaped end sleeve (102a) with an annular structure. A groove is provided in the center of the wedge-shaped end sleeve (102a). A clamping bearing (103a) is built into the groove. The clamping bearing (103a) is sleeved on the optical fiber sheath (104) and tightly connected to it. The outer wall of the wedge-shaped end sleeve (102a) is threaded. A locking nut (103) is connected to the wedge-shaped end sleeve (102a) through the thread. An optical repeater assembly (101a) is provided in the center of the repeater housing (101). The end of the optical fiber inserted into the repeater housing (101) is coaxial with the optical repeater assembly (101a). The optical signal emitted by the optical fiber of one optical fiber sheath (104) is diffused into the optical fiber of the other optical fiber sheath (104) through the optical repeater assembly (101a).

2. The axially rotating optical fiber light source transmission repeater according to claim 1, characterized in that: The repeater housing (101) has a centrally located repeater cavity, and the optical repeater assembly (101a) is installed inside the repeater cavity. The optical repeater assembly (101a) includes at least one of the following: a specular reflective coating, a lens group for collimating or focusing the light beam, and a short-segment fiber optic sheath.

3. The axially rotating optical fiber light source transmission repeater according to claim 1, characterized in that: The repeater housing (101) is cylindrical in shape. The repeater cavity is opened through the center of the repeater housing (101). A flange is provided at the end of the repeater housing (101). A flange is also provided at the connection between the corresponding end sleeve (102) and the repeater housing (101). When the end sleeve (102) is assembled with the repeater housing (101), a sealing ring is provided between the two flanges.

4. The axially rotating optical fiber light source transmission repeater according to claim 2, characterized in that: The repeater housing (101) has inwardly opening mounting grooves at both ends, and deep groove ball bearings are built into the mounting grooves. When the fiber optic sheath (104) is inserted into the repeater housing (101), the deep groove ball bearings are fixedly sleeved on the end of the fiber optic sheath (104) to ensure the coaxiality of the fiber optic sheath (104) and the optical repeater assembly (101a).

5. The axially rotating optical fiber light source transmission repeater according to claim 4, characterized in that: Multiple spacer rings are provided at the connection between the relay cavity and the mounting slot. Spacer rings of different diameters are matched to the coupling requirements of different fiber core diameters or numerical apertures.

6. The axially rotating optical fiber light source transmission repeater according to claim 1, characterized in that: The repeater housing (101) is also provided with stress relief clamps or cable sealing joints at both ends to provide tension relief and bending radius limitation for the fiber optic sheath (104) entering the housing.

7. The axially rotating optical fiber light source transmission repeater according to claim 1, characterized in that: The outer diameter of the wedge-shaped tail sleeve (102a) is larger than the inner diameter of the locking nut (103). When the locking nut (103) is threaded onto the wedge-shaped tail sleeve (102a), the locking nut (103) constrains the wedge-shaped tail sleeve (102a), thereby causing the wedge-shaped tail sleeve (102a) to press tightly against the bearing (103a).

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