Coupler

Abstract

The invention provides a coupler, and relates to the field of optical fiber end face detection. The coupler comprises a body and a detection device, the body comprises a shell and a focusing system arranged in the shell, an exit port of the shell is provided with an optical fiber interface used for being in butt joint with an output head, and the output head is provided with an output optical fiber; an accommodating space is formed between the optical fiber interface and the focusing system; the detection device comprises a camera, a prism assembly and a driving assembly, and the camera is arranged on the shell and used for obtaining an image of the incident end face of the output optical fiber; the prism assembly is arranged in the shell and comprises a support and a prism arranged on the support, and the prism is used for transmitting an image of the incident end face of the output optical fiber to the camera; the driving assembly is arranged on the shell, and the output part is connected with the support and used for driving the support to drive the prism to move into the containing space or leave the containing space. When the coupler is used, after the output head is in butt joint with the optical fiber interface of the coupler, the incident end face of the output optical fiber can be detected through the detection device, and after it is ensured that the cleanliness meets the requirement, laser is introduced for use.

Description

Technical Field

[0001] The present invention relates to the technical field of optical fiber end face detection, and more particularly, to a coupler. Background Art

[0002] The coupler can be used to couple the laser output by the laser into the treatment optical fiber. The end face of the treatment optical fiber must be clean and dust-free. Otherwise, during the laser treatment process, it is easy to cause damage to the optical components in the coupler, and the replacement or repair of optical components is usually expensive.

[0003] In the prior art, the treatment optical fiber is packaged and sold in a sterile and dust-free environment. Currently, there are two common situations: One is that the purchaser of the treatment optical fiber defaults that the purchased treatment optical fiber is clean and dust-free and thus directly uses it. However, during the transportation and handling of the treatment optical fiber, there is a risk of packaging damage and dust mixing in. If directly used, it may not only affect the treatment effect but also pose a risk of burning out the optical components of the coupler. The other is that the purchaser of the treatment optical fiber purchases an optical fiber end face detector in advance and separately detects the end face of the optical fiber before use to ensure risk-free use. However, this will obviously increase the workload and detection cost of the purchaser.

[0004] Therefore, how to ensure that the end face of the treatment optical fiber is clean and dust-free and reduce the workload and detection cost of the purchaser remains the focus of attention in the industry. Summary of the Invention

[0005] The purpose of the present invention is to provide a coupler to solve the technical problems in the prior art that in order to ensure the end face of the treatment optical fiber is clean and dust-free, a detector is purchased separately for detection, resulting in a large workload and high cost.

[0006] The coupler provided by the present invention includes a body and a detection device. The body includes a housing and a focusing system disposed in the housing. An optical fiber interface is provided at the exit of the housing for docking with an output head, and the output head has an output optical fiber; there is an accommodation space between the optical fiber interface and the focusing system; The detection device includes a camera, a prism assembly, and a driving assembly. The camera is disposed on the housing for acquiring an image of the incident end face of the output optical fiber; the prism assembly is disposed in the housing and includes a bracket and a prism disposed on the bracket. The prism is used to transmit the image of the incident end face of the output optical fiber to the camera; the driving assembly is disposed on the housing, and the output part of the driving assembly is connected to the bracket for driving the bracket to drive the prism to move into or out of the accommodation space.

[0007] Further, the detection device further includes an illumination member and an opaque pipe. The opaque pipe extends along the direction of the outgoing light of the prism, with one end close to the reflecting surface of the prism and the other end hermetically connected to the lens of the camera. The illumination member is disposed in the opaque pipe and is used to provide the light required for the camera to take pictures into the opaque pipe.

[0008] Further, the number of the prisms is two. Both of the two prisms are 45° prisms. When detecting, the prism close to the incident end face of the output optical fiber is the first prism. The reflecting surface of the first prism faces the incident end face of the output optical fiber and forms an angle of 135° therewith. The prism close to the driving assembly is the second prism. The reflecting surface of the second prism faces the camera and forms an angle of 135° with the lens of the camera.

[0009] Further, the bracket extends perpendicular to the arrangement direction of the focusing system and the optical fiber interface, and the bracket is provided with an installation groove extending along its length direction. The two prisms are respectively disposed at both ends of the installation groove.

[0010] Further, the reflecting surfaces of the two prisms are arranged in parallel. The camera and the optical fiber interface are disposed on two opposite side walls of the housing. The bracket is further provided with an optical channel. One end of the optical channel is disposed close to the reflecting surface of the second prism, and the other end is connected to the opaque pipe, and is used to transmit the image reflected by the second prism to the opaque pipe and make it transmit along the opaque pipe to the camera.

[0011] Optionally, the reflecting surfaces of the two prisms are arranged perpendicular to each other. The camera and the optical fiber interface are disposed on the side wall on the same side of the housing.

[0012] Optionally, the number of the prisms is one, and it is a 45° prism. The camera is disposed on the side wall of the housing parallel to the laser transmission direction.

[0013] Further, the detection device further includes a fixing frame and a sleeve. The fixing frame is fixedly disposed on the housing. The sleeve is disposed on the fixing frame, and one end of the sleeve is connected to the opaque pipe in a matching manner, and the other end is connected to the optical channel in a matching manner.

[0014] Further, the driving assembly includes a rotating motor. The output part of the rotating motor is fixedly connected to the bracket and is coaxially arranged with the optical channel, and is used to drive the bracket to rotate so as to drive the first prism to move into or out of the accommodation space.

[0015] Further, the rotary electric machine is provided with a through hole, the rotary electric machine is sleeved outside the optical channel through the through hole, and the fixing portion of the rotary electric machine is fixedly connected to the fixing frame.

[0016] Further, the main body of the camera is located outside the side wall of the housing, the light-tight pipe is located inside the housing, and the lens of the camera penetrates through the side wall of the housing and is connected to the light-tight pipe; And / or, the lighting member penetrates through the other side wall of the housing and is connected to the light-tight pipe.

[0017] Further, the coupler is further provided with an air pump, and the air outlet end of the air pump communicates with the cavity inside the housing, and is used for blowing filtered air into the cavity to blow the dust in the cavity out from the optical fiber interface.

[0018] Further, the air pump is arranged outside the housing.

[0019] The coupler provided by the present invention can produce the following beneficial effects: The coupler provided by the present invention is integrated with a detection device on the basis of its body, and is used for detecting the cleanliness of the incident end face of the output optical fiber in the output head docked to its optical fiber interface.

[0020] During detection, the detection device drives the bracket provided with the prism to move into the accommodation space between the optical fiber interface and the focusing system through the driving assembly, so that the prism faces the incident end face of the output optical fiber. The prism can change the propagation direction of the light, so as to transmit the image of the incident end face of the output optical fiber to the camera. After the camera takes the image, the control module of the coupler or the control module of the laser treatment device can process the image obtained by the camera to judge the cleanliness of the incident end face of the output optical fiber. If it is clean and dust-free, that is, it meets the cleanliness requirement, after driving the bracket through the driving assembly to make the prism leave the accommodation space, laser can be introduced into the coupler for use; if the cleanliness requirement is not met, the incident end face of the output optical fiber needs to be cleaned and detected again until the cleanliness requirement is met.

[0021] That is, when using the coupler provided by the present invention, after docking the output head to its optical fiber interface, the incident end face of the output optical fiber of the output head can be detected by the detection device first. After ensuring that the cleanliness meets the requirements, laser can be introduced for use. There is no need to purchase a detector separately, the cost is low, the detection is convenient, and the workload is small. Description of the Drawings

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0023] Figure 1 Structural schematic diagram of the coupler provided by the embodiment of the present invention; Figure 2 One of the partial structural schematic diagrams of the coupler provided by the embodiment of the present invention; Figure 3 Another partial structural schematic diagram of the coupler provided by the embodiment of the present invention; Figure 4 One of the partial structural explosion diagrams of the coupler provided by the embodiment of the present invention; Figure 5 Another partial structural explosion diagram of the coupler provided by the embodiment of the present invention.

[0024] Explanation of reference numerals in the drawings: 100 - body; 110 - housing; 120 - focusing system; 130 - fiber optic interface; 200 - output head; 310 - camera; 320 - light - impermeable pipeline; 330 - lighting element; 340 - fixing bracket; 350 - sleeve; 360 - rotating motor; 370 - bracket; 371 - light channel; 372 - placement groove; 381 - first prism; 382 - second prism; 400 - air pump. Detailed implementation manners

[0025] To make the above - mentioned objects, features, and advantages of the present invention more obvious and understandable, the following will describe the specific embodiments of the present invention in detail with reference to the drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0026] In the prior art, the treatment optical fiber is usually packaged and then sold in a sterile and dust - free environment. However, due to the risk of packaging damage and fiber end - face contamination during transportation and other processes, it is difficult for the purchaser of the treatment optical fiber to know whether its end - face is contaminated before use. If the end - face of the treatment optical fiber is contaminated with dust and not discovered in advance, when the laser is turned on, it is easy to burn out the optical elements of the coupler, and the replacement cost of the optical elements of the coupler is expensive and the cost is high. If a fiber - end - face detector is purchased separately for pre - use detection, it will inevitably increase the cost and workload.

[0027] To solve the above problems, this embodiment provides a coupler, asFigure 1 and Figure 2 As shown in Figure 2 , the coupler includes a body 100 and a detection device. The body 100 includes a housing 110 and a focusing system 120 disposed within the housing 110. An optical fiber interface 130 is provided at the exit port of the housing 110 for docking with an output head 200, and the output head 200 has an output optical fiber. There is an accommodation space between the optical fiber interface 130 and the focusing system 120. The detection device includes a camera 310, a prism assembly, and a driving assembly. The camera 310 is disposed on the housing 110 for acquiring an image of the incident end face of the output optical fiber. The prism assembly is disposed within the housing 110 and includes a bracket 370 and a prism disposed on the bracket 370. The prism is used to transmit the image of the incident end face of the output optical fiber to the camera 310. The driving assembly is disposed on the housing 110, and the output part of the driving assembly is connected to the bracket 370 for driving the bracket 370 to drive the prism to move into or out of the accommodation space.

[0028] For the coupler provided in this embodiment, on the basis of its body 100, an integrated detection device is added to detect the cleanliness of the incident end face of the output optical fiber in the output head 200 docked to its optical fiber interface 130. During detection, the detection device drives the bracket 370 provided with the prism to move into the accommodation space between the optical fiber interface 130 and the focusing system 120 through the driving assembly, so that the prism faces the incident end face of the output optical fiber. The prism can change the propagation direction of light, thereby transmitting the image of the incident end face of the output optical fiber to the camera 310. After the camera 310 takes an image, the control module of the coupler or the control module of the laser treatment device can process the image obtained by the camera 310 to judge the cleanliness of the incident end face of the output optical fiber. If it is clean and dust-free, that is, it meets the cleanliness requirement, then after driving the bracket 370 through the driving assembly to make the prism leave the accommodation space, laser can be introduced into the coupler for use. If the cleanliness requirement is not met, the incident end face of the output optical fiber needs to be cleaned and detected again until the cleanliness requirement is met.

[0029] That is, when using the coupler provided in this embodiment, after docking the output head 200 to its optical fiber interface 130, the incident end face of the output optical fiber of the output head 200 can be detected by the detection device first. After ensuring that the cleanliness meets the requirements, laser can be introduced for use. There is no need to purchase a separate detector, which has low cost, convenient detection, and small workload.

[0030] Among them, receiving and processing the image obtained by the camera 310 through the control module of the coupler or the control module of the laser treatment device to judge the cleanliness of the incident end face of the output optical fiber is a mature existing technology, so it will not be elaborated here.

[0031] In this embodiment, "docking" can be a plug-in connection or a connection through a fixing member or the like. For example, the docking of the output head 200 with the optical fiber interface 130 can be that the output head 200 is plugged into the optical fiber interface 130, or that after aligning the two, they are fixedly connected through a fixing member such as a clamp.

[0032] In addition, it should be noted that in this embodiment, the output head 200 can be a treatment head, that is, its output optical fiber is a treatment optical fiber. However, in other embodiments of the present application, the output head 200 can also have other uses, and the present application does not make specific limitations on this.

[0033] Specifically, in this embodiment, as Figures 2 to 5 shown, the detection device further includes an illumination member 330 and a light-tight pipe 320. The light-tight pipe 320 extends along the direction of the outgoing light of the prism, and one end is close to the reflection surface of the prism, and the other end is hermetically connected to the lens of the camera 310; the illumination member 330 is arranged in the light-tight pipe 320 for providing the light required for the camera 310 to take pictures into the light-tight pipe 320. By using the light-tight pipe 320, it is possible to effectively avoid the mutual interference between the light emitted by the illumination member 330 into the light-tight pipe 320 and the light outside the light-tight pipe 320, and at the same time, it is also possible to exclude the interference of other structures on the camera 310, ensure the accuracy of the image collected by the camera 310, and thus ensure the accuracy of the detection result.

[0034] Specifically, in this embodiment, as Figure 4 and Figure 5 shown, the number of prisms is two, and both prisms are 45° prisms. When detecting, the prism close to the incident end face of the output optical fiber is the first prism 381, and the reflection surface of the first prism 381 faces the incident end face of the output optical fiber and forms a 135° angle with it; the prism close to the driving component is the second prism 382, and the reflection surface of the second prism 382 faces the camera 310 and forms a 135° angle with the lens of the camera 310. In this setting form, the two 45° prisms reflect the incident light first and then, and the light transmission direction turns 90° twice in sequence, so that the light finally transmitted to the camera 310 is parallel to the laser transmission direction, or in other words, parallel to the arrangement direction of the focusing system 120 and the optical fiber interface 130. In this way, the camera 310 can be arranged on the side wall of the housing 110 on the same side as the optical fiber interface 130 or on the side wall opposite to the optical fiber interface 130, and thus the size of the coupler in the direction perpendicular to the laser transmission direction can be reduced, and the volume of the coupler can be controlled.

[0035] More specifically, in this embodiment, as Figure 4 and Figure 5 shown, and in combination with Figure 2As shown, the reflecting surfaces of the two prisms are arranged in parallel. The camera 310 and the optical fiber interface 130 are arranged on two opposite side walls of the housing 110. The bracket 370 is further provided with an optical channel 371. One end of the optical channel 371 is arranged close to the reflecting surface of the second prism 382, and the other end is connected to the light-tight pipe 320, for transmitting the image reflected by the second prism 382 to the light-tight pipe 320 and making it transmit along the light-tight pipe 320 to the camera 310. In this setting form, the transmission direction of the light reflected by the second prism 382 is opposite to the laser transmission direction of the coupler. The output head 200 and the camera 310 are located on two opposite side walls of the housing 110, which can effectively avoid the interference of the camera 310 on the output head 200 and provide convenience for laser treatment and the like using the output head 200. The setting of the optical channel 371 on the bracket 370 provides a channel for the transmission of light from the second prism 382 to the light-tight pipe 320. Preferably, the optical channel 371 is also a light-tight channel, so as to effectively avoid the interference between the internal and external light rays.

[0036] It should be noted here that in other embodiments of the present application, the reflecting surfaces of the two prisms can also be arranged perpendicular to each other. At that time, the transmission direction of the light reflected by the second prism 382 is the same as the laser transmission direction of the coupler. The camera 310 and the optical fiber interface 130 are arranged on the side walls on the same side of the housing 110. It should also be noted that in other embodiments of the present application, the number of prisms is not limited to two, and can also be other numbers. For example, it can also be one. At that time, if it is a 45° prism, the camera 310 can be arranged on the side wall of the housing 110 parallel to the laser transmission direction. That is, as long as the prism can transmit the image of the incident end face of the output optical fiber of the output head 200 to the camera 310 through reflection, the present application can not make specific limitations on the number, form, etc. of the prisms.

[0037] In this embodiment, as Figure 5 shown and in combination with Figure 2 shown, the bracket 370 extends perpendicularly to the arrangement direction of the focusing system 120 and the optical fiber interface 130, and the bracket 370 is provided with an accommodation groove 372 extending along its length direction. The two prisms are respectively arranged at both ends of the accommodation groove 372. Thus, the transmission process of the image of the incident end face of the output optical fiber of the output head 200 is as follows: the incident end face of the output optical fiber of the output head 200 - the accommodation space between the incident end face and the first prism 381 - the first prism 381 - the accommodation groove 372 - the second prism 382 - the optical channel 371 - the light-tight pipe 320 - the camera 310.

[0038] In this embodiment, as Figures 2 to 5As shown, the detection device further includes a fixing bracket 340 and a sleeve 350. The fixing bracket 340 is fixedly arranged on the housing 110. The sleeve 350 is arranged on the fixing bracket 340, and one end of the sleeve 350 is matingly connected to the light-tight pipe 320, and the other end is matingly connected to the optical channel 371. In this setting form, the fixing bracket 340 and the sleeve 350 play a role in fixing and supporting the light-tight pipe 320 and the optical channel 371 on both sides thereof. Of course, in other embodiments of the present application, if the light-tight pipe 320 and the optical channel 371 can be mated, the two can also be directly connected. At that time, a support frame can also be provided to support the light-tight pipe 320 and the optical channel 371.

[0039] In this embodiment, the driving assembly includes a rotating motor 360. The output part of the rotating motor 360 is fixedly connected to the bracket 370 and is coaxially arranged with the optical channel 371, and is used to drive the bracket 370 to rotate so as to drive the first prism 381 to move into or out of the accommodation space.

[0040] Specifically, in this embodiment, as Figure 2 and Figure 5 shown, the rotating motor 360 is provided with a through hole. The rotating motor 360 is sleeved outside the optical channel 371 through the through hole, and the fixing part of the rotating motor 360 is fixedly connected to the fixing bracket 340. In this setting form, the size of the detection device and the coupler along the laser transmission direction can be greatly reduced, thereby reducing the volume of the coupler.

[0041] It should be noted that, in other embodiments of the present application, the rotating motor 360 can also be arranged on the other side of the bracket 370, that is, the rotating motor 360 and the fixing bracket 340 are respectively located on both sides of the bracket 370. That is, as long as the bracket 370 can be driven to rotate so as to drive the first prism 381 to move into or out of the accommodation space between the focusing system 120 and the fiber optic interface 130, the specific setting position of the rotating motor 360 in the present application can be not limited.

[0042] It should also be noted that, in other embodiments of the present application, the driving assembly is not limited to including the rotating motor 360. For example, the driving assembly can also include a linear motor, which can drive the bracket 370 to enter or exit the above-mentioned accommodation space along the length direction of the bracket 370. That is, as long as the first prism 381 can enter and exit the above-mentioned accommodation space, and it can be ensured that after the first prism 381 enters the accommodation space, the image of the incident end face of the output optical fiber can be transmitted to the camera 310, the specific form of the driving assembly in the present application can also be not limited.

[0043] In this embodiment, as Figure 1 and Figure 2As shown in the figure, the coupler is further provided with an air pump 400. The air outlet end of the air pump 400 is communicated with the cavity inside the housing 110, and is used to blow filtered air into the cavity to blow the dust in the cavity out from the optical fiber interface 130. With such a setting, it can ensure that the cavity inside the housing 110 is clean and dust-free, thus effectively avoiding the situation that the dust in the cavity contaminates the incident end face of the output optical fiber after the output head 200 is installed on the optical fiber interface 130. The air pressure of the air pump 400 for blowing air is not higher than 70 kpa, so that the housing 110 maintains a positive pressure to prevent external air and dust from entering. When the output head 200 is not inserted, the air pump 400 keeps blowing air, and when the output head 200 is installed on the optical fiber interface 130, the air pump 400 stops blowing air.

[0044] Specifically, in this embodiment, the air pump 400 is arranged outside the housing 110. With such a setting, the air pump 400 does not occupy the space inside the housing 110, thus effectively controlling the volume of the housing 110.

[0045] In this embodiment, continue as Figure 1 and Figure 2 As shown in the figure, the main body of the camera 310 is located outside the side wall of the housing 110, the light-tight pipe 320 is located inside the housing 110, and the lens of the camera 310 passes through the side wall of the housing 110 and is connected to the light-tight pipe 320; the lighting member 330 passes through the other side wall of the housing 110 and is connected to the light-tight pipe 320. That is, a part of the main body of the camera 310 and the lighting member 330 are both located outside the housing 110. In this way, it can also reduce the utilization of the space inside the housing 110, thus effectively controlling the volume of the housing 110.

[0046] In summary, this embodiment provides a coupler, which is additionally integrated with a detection device. After the output head 200 is installed on the optical fiber interface 130 of the coupler housing 110, the first prism 381 can be driven by the rotating motor 360 to drive the bracket 370 to enter the accommodation space between the focusing system 120 and the optical fiber interface 130, so that the camera 310 can capture an image of the incident end face of the output optical fiber of the output head 200. Then, using the existing image processing technology, the cleanliness of the incident end face of the output optical fiber can be judged. If the cleanliness meets the requirements, after the first prism 381 exits the above accommodation space, the laser can be used; if the cleanliness does not meet the requirements, the output head 200 can be removed, and after the incident end face of the output optical fiber is cleaned, the output head 200 is installed on the optical fiber interface 130 again, and the coupler can be used after passing the detection. It can be seen that when using the coupler provided in this embodiment, the cleanliness of the incident end face of the output optical fiber can be simply detected before using the coupler, so as to ensure that its cleanliness meets the use requirements, effectively avoiding the risk of burning of the optical elements of the coupler caused by not detecting the incident end face of the output optical fiber before use, and there is no need to purchase an expensive detector separately, with low cost and small workload.

[0047] Finally, it should also be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the said element.

[0048] The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A coupler, characterized in that: The invention comprises a body (100) and a detection device, wherein the body (100) comprises a shell (110) and a focusing system (120) arranged in the shell (110), an output port of the shell (110) is provided with an optical fiber interface (130) for docking with an output head (200), the output head (200) having an output optical fiber; and an accommodation space is provided between the optical fiber interface (130) and the focusing system (120); The detection device comprises a camera (310), a prism assembly and a drive assembly; the camera (310) is arranged on the housing (110) and is used to obtain an image of the incident end face of the output optical fiber; the prism assembly is arranged in the housing (110) and comprises a bracket (370) and a prism arranged on the bracket (370); the prism is used to transmit the image of the incident end face of the output optical fiber to the camera (310); the drive assembly is arranged on the housing (110), and the output part of the drive assembly is connected to the bracket (370) and is used to drive the bracket (370) to drive the prism to move into or out of the accommodation space.

2. The coupler according to claim 1, characterized in that The detection device further comprises an illumination element (330) and a light-proof pipe (320), wherein the light-proof pipe (320) is arranged to extend along the direction of the emitted light of the prism, with one end close to the reflection surface of the prism and the other end being sealedly connected to the lens of the camera (310); The lighting element (330) is arranged in the light-tight pipe (320) and is used to provide light required for the camera (310) to shoot into the light-tight pipe (320).

3. The coupler according to claim 2, characterized in that: There are two prisms, both of which are 45° prisms. During detection, the prism close to the incident end face of the output optical fiber is the first prism (381), and the reflection surface of the first prism (381) faces the incident end face of the output optical fiber and forms an angle of 135° with the incident end face; the prism close to the driving component is the second prism (382), and the reflection surface of the second prism (382) faces the camera (310) and forms an angle of 135° with the lens of the camera (310).

4. The coupler according to claim 3, characterized in that: The bracket (370) is extended perpendicularly to the arrangement direction of the focusing system (120) and the optical fiber interface (130), and the bracket (370) is provided with a placement groove (372) extending along its length direction, and the two prisms are respectively arranged at two ends of the placement groove (372).

5. The coupler according to claim 3 or 4, characterized in that: The reflection surfaces of the two prisms are arranged in parallel, and the camera (310) and the optical fiber interface (130) are arranged on two opposite side walls of the housing (110); The bracket (370) is further provided with a light channel (371), one end of the light channel (371) being arranged close to the reflection surface of the second prism (382), and the other end being connected to the light-proof pipe (320), for transmitting the image reflected by the second prism (382) to the light-proof pipe (320) and transmitting it along the light-proof pipe (320) to the camera (310).

6. The coupler according to claim 5, characterized in that The detection device further comprises a fixing frame (340) and a sleeve (350), wherein the fixing frame (340) is fixedly arranged on the housing (110), and the sleeve (350) is arranged on the fixing frame (340), and one end of the sleeve (350) is matched and connected to the light-proof pipe (320), and the other end of the sleeve (350) is matched and connected to the light channel (371).

7. The coupler according to claim 6, characterized in that The driving assembly comprises a rotating motor (360), the output portion of the rotating motor (360) being fixedly connected to the bracket (370) and coaxially arranged with the optical channel (371), and being used to drive the bracket (370) to rotate so as to drive the first prism (381) to move into or out of the accommodation space.

8. The coupler according to claim 7, characterized in that The rotary motor (360) is provided with a through hole, the rotary motor (360) is sleeved outside the light channel (371) through the through hole, and the fixing part of the rotary motor (360) is fixedly connected to the fixing frame (340).

9. The coupler according to claim 2, characterized in that: The main body of the camera (310) is located outside the side wall of the housing (110), the light-proof pipe (320) is located inside the housing (110), and the lens of the camera (310) is disposed through the side wall of the housing (110) and connected to the light-proof pipe (320); And / or, the lighting element (330) is disposed through another side wall of the housing (110) and is connected to the light-proof pipe (320).

10. The coupler according to claim 1, characterized in that The coupler is also provided with an air pump (400), the air outlet of which is in communication with the cavity in the housing (110) and is used to blow filtered air into the cavity so as to blow dust in the cavity out from the optical fiber interface (130).

Images