High speed dual channel optical rotary joint

Abstract

The application relates to a high-speed double-channel optical rotary connector, belonging to the technical field of connectors, which comprises a double-clad fiber coupling assembly, an optical beam scaling assembly, a collimator assembly, a first rotary assembly and a second rotary assembly; the first rotary assembly is installed in the outer shell of the second rotary assembly through a pair of first bearings, the collimator assembly and the optical beam scaling assembly are coaxially installed in the main shaft of the first rotary assembly, the double-clad fiber coupling assembly is installed in the outer shell of the second rotary assembly and coaxially arranged with the optical beam scaling assembly, the double-clad fiber coupling assembly comprises a fiber pin, a double-clad fiber and a coupling lens, the double-clad fiber comprises a core, an inner cladding layer, an outer cladding layer and a protective layer distributed from inside to outside, and the coupling lens is used for coupling single-mode collimated light beams and multi-mode collimated light beams, which are parallelly transmitted after being scaled in interval by the optical beam scaling assembly, into the core and the inner cladding layer respectively. The application can realize stable transmission of double-channel signals in a high-rotation-speed application scenario.

Description

Technical Field

[0001] This invention belongs to the field of connector technology, and specifically relates to a high-speed dual-channel optical rotary connector. Background Technology

[0002] Laser diagnostic and therapeutic technologies have become an important component of modern precision medicine. In clinical applications, they are mainly divided into two major technical directions: laser diagnostic technologies (such as optical coherence tomography and photoacoustic imaging) and laser therapeutic technologies (such as tumor ablation and laser thrombolysis). Most laser diagnostic technologies require high-speed rotation of the connected catheter to complete the optical scanning process. During this process, an optical rotary connector is needed to ensure uninterrupted optical signal transmission during rotation. For example, application number 202010784077.8 (A fiber optic slip ring and OCT imaging system for an OCT system) discloses a single-channel optical rotary connector for an OCT system. With the development of medical technology, technologies with only single diagnostic or therapeutic functions are no longer sufficient to meet the diversified medical needs of clinical practice. Against this backdrop, interventional therapies and other technologies that enable "diagnosis and treatment simultaneously" have developed rapidly and are widely used. To achieve "diagnosis and treatment simultaneously," at least two optical channels are needed: one channel transmits image optical signals for diagnosis; the other channel transmits high-power laser light for treatment. Currently, most dual-channel optical rotary connectors use a rotating prism and gear transmission mechanism.

[0003] Existing medical high-speed optical rotary connectors use single-clad fiber, supporting only single-mode optical signal transmission and incompatible with simultaneous transmission of single-mode image optical signals and high-power multimode laser signals. Current multi-channel optical rotary connectors often employ a prism principle to ensure continuous optical signal transmission during rotation, addressing the misalignment between the rotation center and the optical path. However, this prism transmission requires a 1:2 gear transmission mechanism, resulting in a complex overall structure, and is generally used in low-speed applications. However, the optical rotary connectors required in medical laser diagnostics demand high rotational speeds. Therefore, in high-speed applications such as medical laser diagnostics, the stability of optical signal transmission and rotational lifespan of existing conventional multi-channel optical rotary connectors are significantly reduced, failing to meet practical requirements.

[0004] Existing high-speed single-channel optical rotary connectors only support single-channel signal transmission and cannot transmit multi-mode optical signals simultaneously; while conventional multi-channel optical rotary connectors require complex prism systems and gear transmission systems, which are not suitable for high-speed applications. Summary of the Invention

[0005] The purpose of this invention is to provide a high-speed dual-channel optical rotary connector to achieve stable transmission of dual-channel signals in high-rotation-speed application scenarios.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is: a high-speed dual-channel optical rotating connector, comprising a double-clad fiber coupling assembly, a beam scaling assembly, a collimator assembly, a first rotating assembly, and a second rotating assembly; The beam scaling component and collimator component are installed in the main shaft of the first rotating component and are coaxially arranged. The collimator component includes a first fiber collimator and a second fiber collimator arranged in parallel. The first fiber collimator transmits a single-mode collimated beam, and the second fiber collimator transmits a multimode collimated beam. The beam scaling component includes multiple lenses spaced along the optical path to reduce the distance between the single-mode collimated beam and the multi-mode collimated beam; The first rotating component is mounted in the housing of the second rotating component via a pair of first bearings, and a pair of second bearings are mounted on the outside of the housing; a synchronous pulley for connecting the drive mechanism is also mounted on the outside of the housing. The double-clad fiber coupling assembly is installed inside the housing and is coaxially arranged with the beam scaling assembly. The double-clad fiber coupling assembly includes a fiber ferrule, a double-clad fiber, and a coupling lens. The double-clad fiber includes a core, an inner cladding, an outer cladding, and a protective layer distributed from the inside out. The refractive index of the core is higher than that of the inner cladding, and the refractive index of the inner cladding is higher than that of the outer cladding. The tail end of the double-clad fiber is connected to the fiber ferrule. The coupling lens is used to couple the single-mode collimated beam and the multi-mode collimated beam, which are transmitted in parallel after the beam scaling assembly reduces the spacing, into the core and the inner cladding, respectively.

[0007] Its beneficial effects are: the invention enables the first rotating component and the second rotating component to rotate relative to each other through the first bearing and the second bearing, avoiding complex gear transmission mechanisms and achieving higher rotation speed and rotation life; the double-clad optical fiber can transmit single-mode image optical signals and high-power multimode lasers simultaneously, realizing "diagnosis and treatment at the same time", thereby realizing dual-channel optical signal transmission between two relatively rotating devices and being able to transmit greater power.

[0008] Optionally, the double-clad fiber coupling assembly further includes a capillary tube and a packaging sleeve, wherein the double-clad fiber is installed inside the capillary tube, and the capillary tube and the coupling lens are placed inside the packaging sleeve, with a certain gap between the end face of the capillary tube and the coupling lens.

[0009] Its beneficial effects are: the capillary and encapsulation sleeve can reliably support the double-clad fiber, making it easy to arrange the double-clad fiber coupling component and the beam scaling component coaxially. At the same time, by adjusting the gap between the capillary and the coupling lens, beam collimation can be achieved.

[0010] Optionally, the beam scaling component includes a first lens and a second lens spaced apart along the optical path, wherein the focal length of the first lens is greater than the focal length of the second lens.

[0011] Its beneficial effects are: it provides a dual-lens scheme for beam scaling components, where the first and second lenses can reduce the distance between single-mode collimated beams and multi-mode collimated beams, solving the problem of excessive spacing between dual-channel optical signals and difficulty in coupling; it replaces the Dowell prism and eliminates the need for a complex transmission mechanism.

[0012] Furthermore, the beam scaling assembly also includes a lens positioning seat for positioning and fixing the first lens and the second lens, with the first lens and the second lens located at opposite ends of the lens positioning seat.

[0013] Its beneficial effects are: the lens positioning seat facilitates the fixing of the two lenses on the one hand, and facilitates the coaxial arrangement of the entire beam scaling assembly, collimator assembly and double-clad fiber coupling assembly on the other hand.

[0014] Optionally, the beam scaling assembly includes a first lens, a second lens, and a third lens spaced apart by optical paths.

[0015] Its beneficial effect is that it provides a three-lens scheme for beam scaling components, which can also reduce the distance between single-mode collimated beams and multimode collimated beams, so that the beams can be coupled into the core and inner cladding of the double-clad fiber respectively.

[0016] Optionally, the collimator assembly further includes a collimator positioning seat, with the first fiber collimator and the collimator positioning seat coaxially arranged, the first fiber collimator connected to a single-mode light source, and the second fiber collimator connected to a multimode light source.

[0017] Its beneficial effects are: the collimator positioning seat facilitates the fixing of two fiber collimators on the one hand, and facilitates the coaxial arrangement of the entire collimator assembly, the beam scaling assembly, and the double-clad fiber coupling assembly on the other hand.

[0018] Optionally, the first rotating assembly further includes a preload nut located at the front end of the spindle and a rear sleeve located at the rear end of the spindle. The preload nut and the rear sleeve are used to preload and position the two first bearings at the front and rear ends of the spindle. A splitter seat is provided inside the rear sleeve for fixing the fiber collimator pigtail.

[0019] Its beneficial effect is that it can better fix the first bearing and meet the requirements of high-speed rotation.

[0020] Optionally, multiple adjustment holes are evenly arranged along the circumference on the side of the main shaft, and a first adjustment screw is installed in the adjustment hole for radial position adjustment of the beam scaling component in the main shaft.

[0021] Its beneficial effect is that by coordinating the degree of screwing in of multiple first adjusting screws, the radial position of the beam scaling component is adjusted so that it is coaxial with the collimator component whose radial position is fixed inside the main shaft.

[0022] Optionally, the outer casing is provided with an adjustment hole, the adjustment hole corresponding to the axial position of the adjustment hole on the main shaft.

[0023] Its beneficial effect is that the debugging tool can finely adjust the radial position of the beam scaling component of the first rotating component inside the housing through the debugging hole, thereby realizing the debugging and optimization of the optical path.

[0024] Optionally, the rear end of the outer casing is further provided with a bearing end cap, the front end of which extends into the outer casing and presses against the first bearing at the rear end of the first rotating assembly.

[0025] Its beneficial effects are: it can avoid axial displacement of the first rotating component and ensure reliable and stable relative rotation of the two rotating components.

[0026] Optionally, a corrugated spring is provided between the synchronous pulley and the second bearing located at the rear end of the housing to pre-tighten the second bearing at the rear end; a fixed seat is connected to the front end of the housing, and a retaining ring is provided between the second bearing located at the front end of the housing and the fixed seat to pre-tighten the second bearing at the front end.

[0027] Its beneficial effect is that it allows for pre-tightening of the two second bearings.

[0028] Optionally, the two second bearings are separated by a support sleeve.

[0029] Optionally, the outer shell may also have multiple adjustment holes evenly spaced along its circumference, with a second adjustment screw installed in each hole for radial position adjustment of the double-clad fiber optic coupling assembly inside the outer shell.

[0030] Its beneficial effect is that by coordinating the screwing in of multiple second adjusting screws, the radial position of the double-clad fiber coupling assembly is adjusted so that it is coaxial with the beam scaling assembly and collimator assembly of the first rotating assembly.

[0031] Optionally, the front end of the mounting base is also equipped with an adapter assembly, which includes an adapter and a pin retaining sleeve. The fiber optic pin is inserted into the adapter and fixed by the pin retaining sleeve. The adapter has a connector interface conversion function.

[0032] Its beneficial effect is that the interface form of the connector can be converted through the adapter component to meet the connection needs of different scenarios.

[0033] Optionally, the adapter assembly may further include a flange adapter sleeve for securing the adapter to the mounting base.

[0034] The beneficial effects of this invention are: 1. This invention can realize dual-channel optical signal transmission between two relatively rotating devices. The first bearing and the second bearing enable the first rotating component and the second rotating component to rotate relative to each other; the double-clad optical fiber can simultaneously transmit single-mode image optical signals and high-power multimode lasers, realizing "diagnosis and treatment simultaneously".

[0035] 2. This invention simplifies the connector structure and supports high-speed rotation. The use of double-clad optical fiber solves the problem of dual-channel signals not being able to be transmitted simultaneously at the center. It eliminates the need for Dove prisms and gear transmission mechanisms; the rotational speed is limited only by the bearings, allowing for higher rotational speeds.

[0036] 3. This invention can transmit high-power light beams. The inner cladding diameter of double-clad optical fibers comes in various specifications, mostly in the hundreds of micrometers. Larger diameters can effectively reduce power density and allow for higher output power. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the high-speed dual-channel optical rotary connector described in this invention; Figure 2 This is a schematic diagram of the structure of the double-clad fiber coupling assembly in this invention; Figure 3 This is a schematic diagram of the structure of the double-clad optical fiber in this invention; Figure 4 This is a schematic diagram of the dual-lens structure of the beam scaling component in this invention; Figure 5 This is a schematic diagram of the three-lens structure of the beam scaling component in this invention; Figure 6 This is a schematic diagram of the dual-channel optical signal transmission in the beam scaling component when a three-lens structure is used in this invention; Figure 7 This is a schematic diagram of the collimator assembly in this invention; Figure 8 This is a schematic diagram of the structure of the first rotating component in this invention; Figure 9 This is a schematic diagram of the structure of the second rotating component in this invention; Figure 10 This is a schematic diagram of the structure of the adapter component in this invention; Figure 11 This is a schematic diagram of the dual-channel optical signal transmission of the high-speed dual-channel optical rotary connector described in this invention; The markings in the diagram are: 100, double-clad fiber coupling assembly; 101, fiber optic ferrule; 102, double-clad fiber; 1021, fiber core; 1022, inner cladding; 1023, outer cladding; 1024, protective layer; 103, capillary; 104, encapsulation sleeve; and 105, coupling lens. 200. Beam scaling assembly; 201. Lens positioning base; 202. First lens; 203. Second lens; 204. Third lens; 300. Collimator assembly; 301. Collimator positioning base; 302. First fiber collimator; 303. Second fiber collimator; 304. Fiber collimator pigtail; 305. Single-mode collimated beam; 306. Multimode collimated beam. 400. First rotating assembly; 401. Main shaft; 402. Rear sleeve; 403. Divider seat; 404. First bearing; 405. Preload nut; 406. First adjusting screw; 500, Second rotating assembly; 501, Outer shell; 502, Support sleeve; 503, Bearing end cover; 504, First fixing screw; 505, Synchronous pulley; 506, Corrugated spring; 507, Second bearing; 508, Second adjusting screw; 509, Retaining ring; 510, Fixing seat; 511, Adjustment hole. 600. Adapter assembly; 601. Flange adapter sleeve; 602. Pin retaining sleeve; 603. Adapter; 604. Dust cover; 605. Second fixing screw. Detailed Implementation

[0038] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the invention in any way.

[0039] See attached document Figure 1 As shown, the high-speed dual-channel optical rotating connector of the present invention includes a double-clad fiber coupling assembly 100, a beam scaling assembly 200, a collimator assembly 300, a first rotating assembly 400, a second rotating assembly 500, and an adapter assembly 600.

[0040] The structure of the double-clad fiber coupling assembly 100 is as follows: Figure 2 As shown, the device includes an optical fiber ferrule 101, a double-clad optical fiber 102, a capillary tube 103, a sheathing sleeve 104, and a coupling lens 105. The double-clad optical fiber 102 is installed inside the capillary tube 103, and the tail of the double-clad optical fiber 102 is connected to the optical fiber ferrule 101. The capillary tube 103 and the coupling lens 105 are placed inside the sheathing sleeve 104, with a certain gap between the end faces of the capillary tube 103 and the coupling lens 105. The coupling lens 105 is used to couple the received collimated beam into the double-clad optical fiber 102.

[0041] The double-clad optical fiber 102 can transmit two optical signals simultaneously, and its structure is as follows: Figure 3As shown, the double-clad fiber 102 includes a core 1021, an inner cladding 1022, an outer cladding 1023, and a protective layer 1024, distributed from the inside out. The core 1021 has the highest refractive index, followed by the inner cladding 1022, and the outer cladding 1023 has the lowest refractive index. The protective layer 1024 primarily protects the double-clad fiber 102 from breakage. The capillary tube 103 is used to fix the double-clad fiber 102, and the coupling lens 105 is used to couple the received two optical signals into the core 1021 and the inner cladding 1022 of the double-clad fiber 102. Specifically, the two optical signals are a single-mode collimated beam and a multi-mode collimated beam. The single-mode collimated beam is coupled into the core 1021 of the double-clad fiber 102, and the multi-mode collimated beam is coupled into the inner cladding 1022 of the double-clad fiber 102.

[0042] like Figure 4 , 5 As shown, the beam scaling assembly 200 includes a lens positioning base 201 and multiple lenses, which are spaced apart along the optical path within the lens positioning base 201. The multiple lenses refer to two or more lenses. Through the cooperation of these lenses, the beam spacing between the received single-mode collimated beam and multi-mode collimated beam can be reduced, so that the reduced-spacing single-mode collimated beam and multi-mode collimated beam can enter the core 1021 and inner cladding 1022 of the double-clad optical fiber 102 via the coupling lens 105.

[0043] Figure 4 A dual-lens structure for the beam scaling assembly 200 is presented, comprising two lenses: a first lens 202 and a second lens 203 positioned along the optical path. The first lens 202 and the second lens 203 are mounted within a lens positioning base 201, located at opposite ends of the base. The two lenses are confocal, with the first lens 202 having a longer focal length than the second lens 203, to achieve beam scaling. The lens positioning base 201 is used to position and fix the first lens 202 and the second lens 203.

[0044] Figure 5 , 6 The diagrams show the three-lens structure of the beam scaling component 200 and the corresponding dual-channel optical signal transmission. The beam scaling component 200 includes three lenses: a first lens 202, a second lens 203, and a third lens 204 spaced apart along the optical path. These three lenses are mounted within a lens positioning base 201, with the first lens 202 and the third lens 204 located at opposite ends of the base. When the single-mode collimated beam 305 and the multi-mode collimated beam 306, with a relatively large input distance, pass sequentially through the first lens 202, the second lens 203, and the third lens 204, the beam distance is significantly reduced, and the beams exit from the output of the beam scaling component 200.

[0045] The collimator assembly 300 includes a collimator positioning base 301 and a first fiber collimator 302 and a second fiber collimator 303 installed within the collimator positioning base 301, the structure of which is as follows: Figure 7 As shown in the diagram, the first fiber collimator 302 and the collimator positioning base 301 are coaxially arranged. The first fiber collimator 302 is connected to a single-mode light source to output a single-mode collimated beam. The second fiber collimator 303 is arranged parallel to the first fiber collimator 302 and is connected to a multimode light source to output a multimode collimated beam. Both the first fiber collimator 302 and the second fiber collimator 303 are fixed within the collimator positioning base 301 by adhesive bonding. The single-mode collimated beam and the multimode collimated beam are passed through multiple lenses in the beam scaling assembly 200 to achieve beam scaling, reduce the distance between the two beams, and facilitate coupling with the double-clad fiber 102.

[0046] The first rotating assembly 400 includes a main shaft 401, a rear sleeve 402, a branch connector 403, a first bearing 404, a preload nut 405, and a first adjusting screw 406, and its structure is as follows: Figure 8 As shown. First bearings 404 are mounted at both ends of the main shaft 401, enabling relative rotation between the main shaft 401 and the second rotating assembly 500. A preload nut 405 is installed at the front end of the main shaft 401, which tightens the inner ring of the first bearing 404 at the front end. A rear sleeve 402 is threadedly connected to the rear end of the main shaft 401, and the rear sleeve 402 tightens the inner ring of the first bearing 404 at the rear end. A splitter 403 is installed inside the rear sleeve 402 for fixing the fiber optic collimator pigtail 304. The main shaft 401 is a hollow shaft, in which the beam scaling component 200 and collimator component 300 are installed. Three adjustment holes are evenly spaced along the circumference of the side of the main shaft 401. First adjustment screws 406 are installed in each adjustment hole. By pressing the three first adjustment screws 406 against the side of the lens positioning seat 201 of the beam scaling component 200, the radial position of the beam scaling component 200 installed in the main shaft 401 is adjusted, making the beam scaling component 200 and the collimator component 300 coaxial. In other embodiments, the number of adjustment holes is not limited to three; there can be more than three.

[0047] The second rotating assembly 500 includes a housing 501, a support sleeve 502, a bearing end cover 503, a first fixing screw 504, a synchronous pulley 505, a corrugated spring 506, a second bearing 507, a second adjusting screw 508, a retaining ring 509, and a fixing base 510, as shown in the figure. Figure 9As shown. A pair of second bearings 507 are mounted on the outer casing 501, separated by a support sleeve 502. The outer casing 501 is used to install the first rotating assembly 400 and the double-clad fiber optic coupling assembly 100. The outer ring of the first bearing 404 at the front end of the first rotating assembly 400 rests on the stepped surface of the inner wall of the outer casing 501. The bearing end cap 503 and the synchronous pulley 505 are installed at the rear end of the outer casing 501 and fixed to the outer casing 501 by the first fixing screw 504. The front end of the bearing end cap 503 extends into the outer casing 501 to press against the outer ring of the first bearing 404 located at the rear end of the first rotating assembly 400. The synchronous pulley 505 is installed on the outer side of the outer casing 501 to connect to a motor or other equipment and drive the outer casing 501 to rotate. A corrugated spring 506 is provided between the synchronous pulley 505 and the second bearing 507 at the rear end of the outer casing 501 to preload the second bearing 507. The mounting base 510 is installed at the front end of the housing 501 and is threadedly connected to the housing 501. It is tightened against the second bearing 507 at the front end by a retaining ring 509 installed on the housing 501. The housing 501 also has three adjustment holes evenly distributed around its circumference. Each adjustment hole is fitted with a second adjustment screw 508. The radial position of the double-clad fiber optic coupling assembly 100 installed inside the housing 501 is adjusted by the three second adjustment screws 508 so that it is coaxial with the beam scaling assembly 200 inside the first rotating assembly 400.

[0048] After the first rotating assembly 400 and the second rotating assembly 500 are installed, it is difficult to ensure the coaxiality of the beam scaling assembly 200, the collimator assembly 300, and the double-clad fiber coupling assembly 100. Therefore, after installation, it is necessary to fine-tune the first adjusting screw 406 and the second adjusting screw 508. Since the housing 501 and the first adjusting screw 406 are located between the two first bearings 404, it is difficult to adjust the first adjusting screw 406 using tools. To address this, the present invention provides an adjustment hole 511 on the housing 501. The axial position of the adjustment hole 511 corresponds to the first adjusting screw 406, allowing adjustment tools to fine-tune the first adjusting screw 406 through the adjustment hole 511. With one adjustment hole 511, multiple first adjusting screws 406 can be fine-tuned through one adjustment hole 511 by rotating the first rotating assembly 400.

[0049] In this embodiment, the fiber optic ferrule 101 is an FC ferrule, which can be converted to an SC interface through the adapter of the adapter assembly 600 to meet the needs of the application scenario. The adapter assembly 600 includes a flange adapter sleeve 601, a ferrule fixing sleeve 602, an adapter 603, a dust cover 604, and a second fixing screw 605, and its structure is as follows. Figure 10As shown. The adapter assembly 600 is installed at the front end of the mounting base 510. The adapter 603 is an SC adapter, installed inside the mounting base 510 and fixed to it via a flange adapter sleeve 601. The flange adapter sleeve 601, adapter 603, and mounting base 510 are then secured together by a second fixing screw 605. The fiber optic ferrule 101 of the double-clad fiber optic coupling assembly 100, mounted on the second rotating assembly 500, is inserted into the adapter 603 and fixed by a ferrule fixing sleeve 602, for use with laser diagnostic equipment, etc. When not in use, a dust cover 604 is installed at the socket of the adapter 603 to seal it from dust.

[0050] In other embodiments, the fiber optic ferrule 101 can meet the needs of the application scenario, so there is no need to perform interface conversion, and therefore there is no need to install the above-mentioned adapter component 600.

[0051] Combined Figure 1-10 As shown, the first rotating assembly 400 is mounted within the outer housing 501 of the second rotating assembly 500 via a pair of first bearings 404. The collimator assembly 300 and the beam scaling assembly 200 are mounted coaxially within the main shaft 401 of the first rotating assembly 400. The double-clad fiber coupling assembly 100 is mounted coaxially with the beam scaling assembly 200 within the outer housing 501 of the second rotating assembly 500.

[0052] The following is combined Figure 11 The dual-channel signal transmission process of the present invention will be described, wherein the beam scaling component 200 employs... Figure 4 The described dual-lens structure involves a first fiber collimator 302 transmitting a single-mode collimated beam 305 and a second fiber collimator 303 transmitting a multimode collimated beam 306. The beams are scaled by the long-focal-length first lens 202 and the short-focal-length second lens 203, and then coupled into the double-clad fiber 102 via a coupling lens 105. The single-mode collimated beam 305 is coaxially transmitted with the rotation axes of the first rotating component 400 and the second rotating component 500 and coupled into the core 1021 of the double-clad fiber 102. The multimode collimated beam 306 is transmitted parallel to the single-mode collimated beam 305 and coupled into the inner cladding 1022 of the double-clad fiber 102. Since the refractive index of the core > the refractive index of the inner cladding > the refractive index of the outer cladding, the refractive index distribution satisfies the total internal reflection condition. Therefore, the single-mode signal is confined to the core 1021, and the multimode signal is confined to the inner cladding 1022. Because the inner cladding 1022 has a larger diameter, it can effectively reduce the power density, thus enabling the transmission of greater optical power.

[0053] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Those skilled in the art should understand that modifications or equivalent substitutions can be made to the specific implementation of the present invention with reference to the above embodiments. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention are within the protection scope of the pending claims.

Claims

1. A high-speed dual-channel optical rotary connector, characterized in that, It includes a double-clad fiber coupling assembly (100), a beam scaling assembly (200), a collimator assembly (300), a first rotation assembly (400), and a second rotation assembly (500); The beam scaling component (200) and collimator component (300) are mounted on the main shaft of the first rotating component (400) and are coaxially arranged. The collimator component (300) includes a first fiber collimator (302) and a second fiber collimator (303) arranged in parallel. The first fiber collimator (302) transmits a single-mode collimated beam, and the second fiber collimator (303) transmits a multimode collimated beam. The beam scaling component (200) includes a plurality of lenses spaced along the optical path for reducing the distance between the single-mode collimated beam and the multimode collimated beam; The first rotating assembly (400) is mounted inside the outer shell (501) of the second rotating assembly (500) via a pair of first bearings (404). A pair of second bearings (507) are mounted on the outer side of the outer shell (501). A synchronous pulley (505) for connecting the drive mechanism is also mounted on the outer shell (501). The double-clad fiber coupling assembly (100) is installed inside the housing (501) and coaxially arranged with the beam scaling assembly (200); the double-clad fiber coupling assembly (100) includes a fiber ferrule (101), a double-clad fiber (102), and a coupling lens (105). The double-clad fiber (102) includes a core (1021), an inner cladding (1022), an outer cladding (1023), and a protective layer (1024) distributed from the inside out. The refractive index of the fiber core (1021) is higher than that of the inner cladding (1022), and the refractive index of the inner cladding (1022) is higher than that of the outer cladding (1023). The tail end of the double-clad fiber (102) is connected to the fiber ferrule (101). The coupling lens (105) is used to couple the single-mode collimated beam and the multi-mode collimated beam, which are transmitted in parallel after the beam scaling component (200) reduces the spacing, into the fiber core (1021) and the inner cladding (1022), respectively.

2. The high-speed dual-channel optical rotary connector according to claim 1, characterized in that, The double-clad fiber coupling assembly (100) further includes a capillary tube (103) and a packaging sleeve (104). The double-clad fiber (102) is installed inside the capillary tube (103). The capillary tube (103) and the coupling lens (105) are placed inside the packaging sleeve (104), and the capillary tube (103) and the end face of the coupling lens (105) are separated by a certain gap.

3. The high-speed dual-channel optical rotary connector according to claim 1, characterized in that, The beam scaling assembly (200) includes a first lens (202) and a second lens (203) placed confocally, and the focal length of the first lens (202) is greater than the focal length of the second lens (203).

4. The high-speed dual-channel optical rotary connector according to claim 3, characterized in that, The beam scaling assembly (200) also includes a lens positioning seat (201) for positioning and fixing the first lens (202) and the second lens (203), with the first lens (202) and the second lens (203) located at both ends of the lens positioning seat (201).

5. The high-speed dual-channel optical rotary connector according to claim 1, characterized in that, The beam scaling assembly (200) includes a first lens (202), a second lens (203), and a third lens (204) arranged at intervals along the optical path.

6. The high-speed dual-channel optical rotary connector according to claim 1, characterized in that, The collimator assembly (300) further includes a collimator positioning seat (301), a first fiber collimator (302) and a collimator positioning seat (301) are coaxially arranged, the first fiber collimator (302) is connected to a single-mode light source, and the second fiber collimator (303) is connected to a multimode light source.

7. The high-speed dual-channel optical rotary connector according to claim 1, characterized in that, The first rotating assembly (400) also includes a preload nut (405) located at the front end of the main shaft (401) and a rear sleeve (402) located at the rear end of the main shaft (401). The preload nut (405) and the rear sleeve (402) are used to preload and position the two first bearings (404) at the front and rear ends of the main shaft (401). A splitter seat (403) is provided in the rear sleeve (402) for fixing the fiber collimator pigtail (304).

8. The high-speed dual-channel optical rotary connector according to claim 1, characterized in that, Multiple adjustment holes are evenly arranged along the circumference on the side of the main shaft (401), and a first adjustment screw (406) is installed in the adjustment hole for radial position adjustment of the beam scaling component (200) in the main shaft (401).

9. The high-speed dual-channel optical rotary connector according to claim 1, characterized in that, The outer casing (501) is provided with an adjustment hole (511), which corresponds to the axial position of the adjustment hole on the main shaft (401).

10. The high-speed dual-channel optical rotary connector according to claim 1, characterized in that, The rear end of the outer shell (501) is also provided with a bearing end cap (503), the front end of which extends into the outer shell (501) and presses against the first bearing (404) at the rear end of the first rotating assembly (400).

11. The high-speed dual-channel optical rotary connector according to claim 1, characterized in that, A corrugated spring (506) is provided between the synchronous pulley (505) and the second bearing (507) located at the rear end of the outer casing (501) to pre-tighten the second bearing (507) at the rear end; a fixed seat (510) is connected to the front end of the outer casing (501), and a retaining ring (509) is provided between the second bearing (507) located at the front end of the outer casing (501) and the fixed seat (510) to pre-tighten the second bearing (507) at the front end.

12. The high-speed dual-channel optical rotary connector according to claim 1, characterized in that, The two second bearings (507) are separated by a support sleeve (502).

13. The high-speed dual-channel optical rotary connector according to claim 1, characterized in that, The outer shell (501) also has a plurality of adjustment holes evenly distributed around its circumference. Each adjustment hole is fitted with a second adjustment screw (508) for radial position adjustment of the double-clad fiber optic coupling assembly (100) inside the outer shell (501).

14. The high-speed dual-channel optical rotary connector according to claim 1, characterized in that, The front end of the mounting base (510) is also equipped with an adapter assembly (600), which includes an adapter (603) and a pin retaining sleeve (602). The fiber optic pin (101) is inserted into the adapter (603) and fixed by the pin retaining sleeve (602). The adapter (603) has a connector interface conversion function.

15. The high-speed dual-channel optical rotary connector according to claim 14, characterized in that, The adapter assembly (600) also includes a flange adapter sleeve (601) for securing the adapter (603) to the mounting base (510).

Images