Coupling device for a moving wave optical fiber and an optoelectronic conversion element, and detection system

Abstract

The embodiment of the present application provides a coupling device of a wave-shifted optical fiber and a photoelectric conversion element and a detection system, the coupling device comprises a shell and an elastic clamping piece. The shell is provided with a plug groove and an opening communicated with the plug groove, a side wall of the shell on the side opposite to the opening is provided with a plug channel penetrating through the side wall of the shell, the shell is connected with the photoelectric conversion element through the plug groove, the wave-shifted optical fiber is arranged in the plug channel and is coupled with the photoelectric conversion element; at least part of the elastic clamping piece is arranged in the plug channel, and the elastic clamping piece clamps the wave-shifted optical fiber under the action of elastic force. The coupling device provided by the embodiment of the present application clamps the wave-shifted optical fiber under the action of elastic force through the arrangement of the elastic clamping piece, so that the surface of the wave-shifted optical fiber can be firmly attached to the surface of the photoelectric conversion element, thereby effectively guaranteeing the stable output of the light in the wave-shifted optical fiber, the wave-shifted optical fiber can be repeatedly plugged and unplugged, maintenance is facilitated, and the surface of the wave-shifted optical fiber cannot be damaged due to the excessive clamping force of the elastic clamping piece.

Description

Technical Field

[0001] This application relates to the field of detection technology, and in particular to a coupling device and detection system for a wave-shifting optical fiber and a photoelectric conversion element. Background Technology

[0002] Cosmic ray muon imaging is a novel non-destructive imaging technique developed in recent years. It utilizes the transmission and scattering phenomena that occur when cosmic ray muons pass through an object to create an image. A plastic scintillator is a type of muon detector; however, light attenuates after traveling a certain distance within the scintillator. To increase the fluorescence transmission efficiency, a wave-shifting fiber is added to the center of the scintillator. The light in the wave-shifting fiber is then converted into an electrical signal by a photoelectric conversion element, typically a multi-anode photomultiplier tube.

[0003] In related technologies, the coupling device used between the photoelectric conversion element and the wave-shifting optical fiber cannot effectively guarantee the stable output of light in the wave-shifting optical fiber. Summary of the Invention

[0004] In view of this, embodiments of this application aim to provide a coupling device for a wave-shifting optical fiber and a photoelectric conversion element, which can effectively ensure the stable output of light in the wave-shifting optical fiber.

[0005] To achieve the above objectives, embodiments of this application provide a coupling device for a wave-shifting optical fiber and a photoelectric conversion element, comprising:

[0006] The housing has a plug slot and an opening communicating with the plug slot. The side wall of the housing opposite to the opening has at least one plug channel penetrating the side wall of the housing. The housing is connected to the photoelectric conversion element through the plug slot so that the wave-shifting optical fiber can pass through the plug channel and couple with the photoelectric conversion element.

[0007] An elastic clamping member, at least a portion of which is disposed in the plug channel, clamps the wave-shifting optical fiber under elastic force when the wave-shifting optical fiber passes through the plug channel.

[0008] In some embodiments, the housing includes a housing body and a protective cover connected to the housing body, the elastic clamping member is disposed between the housing body and the protective cover, the housing body is provided with the insertion groove and the opening, the housing body is provided with at least one first sub-channel, and the protective cover is provided with a second sub-channel corresponding to the first sub-channel, the first sub-channel and the second sub-channel at least constitute a portion of the insertion channel.

[0009] In some embodiments, the surface of the housing is black.

[0010] In some embodiments, a receiving groove is formed on the side of the housing near the second sub-channel, the first sub-channel and the second sub-channel are connected through the receiving groove, and the elastic clamping member is disposed in the receiving groove.

[0011] In some embodiments, the protective cover has a receiving groove formed on the side near the first sub-channel, the first sub-channel and the second sub-channel are connected through the receiving groove, and the elastic clamp is disposed in the receiving groove.

[0012] In some embodiments, the elastic clamping member has a wire passage inside, and the elastic clamping member gradually contracts axially from opposite ends toward the middle to form a clamping part. When the wave-shifting optical fiber passes through the wire passage, the clamping part clamps the periphery of the wave-shifting optical fiber.

[0013] In some embodiments, the sidewall of the resilient clamp is broken to form an opening slot that extends axially.

[0014] In some embodiments, the sidewalls of the resilient clamp are formed with deformation grooves that extend axially.

[0015] In some embodiments, the coupling device includes a sealing gasket disposed in the insertion groove and abutting against the groove wall, the sealing gasket having an insertion hole corresponding to the insertion channel.

[0016] In some embodiments, the diameter of the plug hole is smaller than the diameter of the wave-shifting optical fiber.

[0017] In some embodiments, the thickness of the sealing gasket is 1mm-3mm.

[0018] In some embodiments, the surface of the sealing gasket is black.

[0019] An embodiment of this application provides a detection system, including a wave-shifting optical fiber, a photoelectric conversion element, and the coupling device described above. The photoelectric conversion element is disposed in the insertion slot, the wave-shifting optical fiber passes through the insertion channel and is coupled to the photoelectric conversion element, and the elastic clamping member clamps the wave-shifting optical fiber under the action of elastic force.

[0020] The coupling device and detection system for wave-shifting optical fiber and photoelectric conversion element provided in this application embodiment include a housing and an elastic clamping member. The housing is provided with a plug slot and an opening communicating with the plug slot. The side wall of the housing on the side opposite to the opening is provided with at least one plug channel penetrating the side wall of the housing. The housing is connected to the photoelectric conversion element through the plug slot, so that the wave-shifting optical fiber can pass through the plug channel and couple with the photoelectric conversion element. That is, at least part of the photoelectric conversion element extends into the plug slot and connects with the housing, so that the side wall of the photoelectric conversion element abuts against the wall of the plug slot. To a certain extent, it can prevent external light from entering through the gap between the photoelectric conversion element and the wall of the plug slot. That is, the light entering the photoelectric conversion element can only enter through the wave-shifting optical fiber, thereby improving the detection accuracy of the detection system. Since the surface of the wave-shifting fiber has no protective shell, in order to avoid damage to the wave-shifting fiber, the coupling device of this application embodiment is provided with elastic clamping members. At least part of the elastic clamping members are provided in the plug-in channel. When the wave-shifting fiber is inserted into the plug-in channel, the elastic clamping members clamp the wave-shifting fiber under the action of elastic force. That is to say, by setting the elastic clamping members to clamp the wave-shifting fiber under the action of elastic force, the elastic clamping members provide sufficient clamping force to fix the wave-shifting fiber, so that the surface of the wave-shifting fiber can be firmly attached to the surface of the photoelectric conversion element, thereby effectively ensuring the stable output of light in the wave-shifting fiber. Moreover, the wave-shifting fiber can be repeatedly plugged and unplugged, which is convenient for maintenance. At the same time, the surface of the wave-shifting fiber will not be damaged due to excessive clamping force of the elastic clamping members. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the coupling device in one embodiment of this application;

[0022] Figure 2 for Figure 1 A cross-sectional view along the AA direction;

[0023] Figure 3 for Figure 1 Top view;

[0024] Figure 4 This is a schematic diagram of the structure of the elastic clamping member in one embodiment of this application.

[0025] Explanation of reference numerals in the attached figures

[0026] 10. Coupling device; 11. Housing; 11a. Insertion slot; 11b. Opening; 11c. Insertion channel; 111. Housing body; 111a. First sub-channel; 111b. Receiving groove; 112. Protective cover; 112a. Second sub-channel; 12. Elastic clamping element; 12a. Wire passage channel; 12b. Clamping part; 12c. Opening groove; 12d. Deformation groove; 13. Sealing gasket; 13a. Insertion hole. Detailed Implementation

[0027] It should be noted that, unless otherwise specified, the embodiments and technical features in the embodiments of this application can be combined with each other, and the detailed descriptions in the specific implementation should be understood as explanations of the purpose of this application and should not be regarded as undue limitations on this application.

[0028] The directional terms used in the description of this application are for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this application.

[0029] This application provides a detection system including a wave-shifting optical fiber, a photoelectric conversion element, and a coupling device provided in this application embodiment. The photoelectric conversion element is disposed in the insertion slot 11a of the coupling device 10, the wave-shifting optical fiber passes through the insertion channel 11c of the coupling device 10 and is coupled to the photoelectric conversion element, and the elastic clamping member 12 clamps the wave-shifting optical fiber under the action of elastic force.

[0030] The detection system includes a plastic scintillator, but light attenuates after traveling a certain distance in the plastic scintillator. In order to increase the transmission efficiency of fluorescence in the scintillator, a wave-shifting optical fiber is added to the center of the scintillator.

[0031] One function of wave-shifting optical fiber is to convert the wavelength of fluorescence in a detector into light that can be received by a photoelectric conversion element. Another function is to improve the efficiency of light collection and transmission. The light in the wave-shifting optical fiber is transmitted to the photoelectric conversion element and converted into an electrical signal. Compared with ordinary communication optical fiber, wave-shifting optical fiber has a larger diameter, for example, 1.2 mm, and its surface has no protective outer shell.

[0032] Please see Figures 1 to 4 This application provides a coupling device 10 for a wave-shifting optical fiber and a photoelectric conversion element. The coupling device 10 includes a housing 11 and an elastic clamping member 12.

[0033] The housing 11 is provided with a plug-in slot 11a and an opening 11b communicating with the plug-in slot 11a. The side wall of the housing 11 on the side opposite to the opening 11b is provided with at least one plug-in channel 11c penetrating the side wall of the housing 11. The photoelectric conversion element can be inserted into the plug-in slot 11a through the opening 11b. The wave-shifting optical fiber can pass through the plug-in channel 11c and couple with the photoelectric conversion element.

[0034] The specific type of photoelectric conversion element is not limited here. For example, in one embodiment, the photoelectric conversion element is a multi-anode photomultiplier tube. A multi-anode photomultiplier tube is a multi-channel acquisition device with its surface divided into 8×8 detection zones. Each detection zone is square with a side length of 6mm and a total outer diameter of 48.5mm×48.5mm, and is encapsulated in glass.

[0035] The number of plug-in channels 11c is not limited here, and the number of plug-in channels 11c can correspond to the number of wave-shifting optical fibers. Please refer to [link / reference]. Figure 3 In this embodiment of the application, the number of insertion channels 11c is 64. That is to say, the coupling device 10 of this embodiment of the application can fix 64 wave-shifting optical fibers at the same time, that is, it can simultaneously couple 64 wave-shifting optical fibers with photoelectric conversion elements.

[0036] At least a portion of the elastic clamping member 12 is disposed in the insertion channel 11c. When the wave-shifting fiber is inserted into the insertion channel 11c, the elastic clamping member 12 clamps the wave-shifting fiber under elastic force. That is, when the wave-shifting fiber is inserted into the insertion channel 11c, the elastic clamping member 12 undergoes elastic deformation and clamps the wave-shifting fiber under elastic force, so that the elastic clamping member 12 provides sufficient clamping force to fix the wave-shifting fiber. During normal use, the clamping force of the elastic clamping member 12 ensures that the wave-shifting fiber will not move vertically, horizontally, or laterally when inserted into the insertion channel 11c.

[0037] In related technologies, most fiber optic connectors and sockets are designed for communication fibers. There is also specialized equipment for crimping connectors for communication fibers. However, communication fibers have a relatively small diameter, making these connectors unsuitable for larger-diameter wave-shifting fibers. Sockets for fibers with a diameter of 1mm or more are designed for fibers with protective sheaths. There are no dedicated sockets or plugs for wave-shifting fibers. Even if such sockets and plugs were modified, their large size (over 4mm) would prevent them from being tightly arranged side-by-side within a 48.5mm × 48.5mm square area, and would also damage the surface of the wave-shifting fiber to some extent. Furthermore, multi-anode multiplier tubes have very smooth surfaces, while wave-shifting fiber ends are round and polished smooth, requiring a special coupling structure for their combination.

[0038] The coupling device between the wave-shifting optical fiber and the photoelectric conversion element provided in this application embodiment includes a housing 11 and an elastic clamping member 12. The housing 11 is provided with a plug slot 11a and an opening 11b communicating with the plug slot 11a. The side wall of the housing 11 on the side opposite to the opening 11b is provided with at least one plug channel 11c penetrating the side wall of the housing 11. The housing 11 is connected to the photoelectric conversion element through the plug slot 11a, so that the wave-shifting optical fiber can pass through the plug channel 11c and couple with the photoelectric conversion element. That is, at least part of the photoelectric conversion element extends into the plug slot 11a and connects with the housing 11, so that the side wall of the photoelectric conversion element abuts against the groove wall of the plug slot 11a. To a certain extent, it can prevent external light from entering through the gap between the photoelectric conversion element and the groove wall of the plug slot 11a. That is, the light entering the photoelectric conversion element can only enter through the wave-shifting optical fiber, thereby improving the detection accuracy of the detection system. Since the surface of the wave-shifting fiber has no protective shell, in order to avoid damage to the wave-shifting fiber, the coupling device 10 of this application embodiment is provided with an elastic clamping member 12. At least part of the elastic clamping member 12 is provided in the insertion channel 11c. When the wave-shifting fiber is inserted into the insertion channel 11c, the elastic clamping member 12 clamps the wave-shifting fiber under the action of elastic force. That is to say, by setting the elastic clamping member 12 to clamp the wave-shifting fiber under the action of elastic force, the elastic clamping member 12 provides sufficient clamping force to fix the wave-shifting fiber, so that the surface of the wave-shifting fiber can be firmly attached to the surface of the photoelectric conversion element, thereby effectively ensuring the stable output of light in the wave-shifting fiber. Moreover, the wave-shifting fiber can be repeatedly inserted and removed, which is convenient for maintenance. At the same time, the surface of the wave-shifting fiber will not be damaged due to excessive clamping force of the elastic clamping member 12.

[0039] The coupling device in this embodiment effectively solves the problem of coupling multiple wave-shifting optical fibers to the surface of a photomultiplier tube, ensuring that the wave-shifting optical fibers can be freely inserted and removed, and that the surface of the wave-shifting optical fibers can be firmly attached to the surface of the photomultiplier tube, without optical crosstalk between the wave-shifting optical fibers. This provides technical support for the readout of light in the optical guide detector during muon measurement.

[0040] It should be noted that the aperture of the insertion channel 11c is slightly smaller than the diameter of the wave-shifting fiber to facilitate a tight fit between the wave-shifting fiber and the housing 11. For example, the aperture of the insertion channel 11c is 1.2 mm. -0.1 mm.

[0041] In one embodiment, please refer to Figures 1 to 3 The housing 11 includes a housing body 111 and a protective cover 112 connected to the housing body 111. The elastic clamping member 12 is disposed between the housing body 111 and the protective cover 112. That is, the housing 11 achieves the fixation of the elastic clamping member 12 by providing the housing body 111 and the protective cover 112 connected to the housing body 111.

[0042] The outer dimensions of the insertion slot 11a are slightly larger than the outer diameter of the photoelectric conversion element, ensuring that the photoelectric conversion element can be inserted into the insertion slot 11a without wobbling.

[0043] The specific connection method between the housing 111 and the protective cover 112 is not limited here. For example, the housing 111 and the protective cover 112 can be connected by magnetic attraction, adhesive bonding, snap-fit, threaded connection, fastening connection or plug-in connection.

[0044] Please see Figure 2 The shell 111 is provided with a insertion groove 11a and an opening 11b. The shell 111 is provided with at least one first sub-channel 111a, and the protective cover 112 is provided with a second sub-channel 112a corresponding to the first sub-channel 111a. The first sub-channel 111a and the second sub-channel 112a at least constitute a partial insertion channel 11c. That is, the side wall of the shell 11 on the side opposite to the opening 11b includes the side wall of the shell 111 on the side opposite to the opening 11b and the side wall of the protective cover 112 on the side opposite to the opening 11b. In other words, the insertion channel 11c penetrates the side wall of the shell 111 and the side wall of the protective cover 112 on the side opposite to the opening 11b.

[0045] The first sub-channel 111a and the second sub-channel 112a constitute at least a portion of the plug-in channel 11c, meaning that the first sub-channel 111a and the second sub-channel 112a can constitute the entire plug-in channel 11c or a portion of the plug-in channel 11c.

[0046] In one embodiment, please refer to Figure 2 A receiving groove 111b is formed on the side of the housing 111 near the second sub-channel 112a. The first sub-channel 111a and the second sub-channel 112a are connected through the receiving groove 111b. The elastic clamping member 12 is disposed in the receiving groove 111b. That is, by providing the receiving groove 111b on the housing 111 and the elastic clamping member 12 is disposed in the receiving groove 111b, the opposite ends of the elastic clamping member 12 are clamped between the housing 111 and the protective cover 112 to fix the elastic clamping member 12. The first sub-channel 111a and the second sub-channel 112a are connected through the receiving groove 111b. When the wave-shifting optical fiber passes through the plug-in channel 11c, the elastic clamping member 12 clamps the wave-shifting optical fiber.

[0047] In other embodiments, a receiving groove 111b is formed on the side of the protective cover 112 near the first sub-channel 111a. The first sub-channel 111a and the second sub-channel 112a are connected through the receiving groove 111b, and the elastic clamping member 12 is disposed in the receiving groove 111b. That is, by providing the receiving groove 111b on the protective cover 112 and disposing of the elastic clamping member 12 in the receiving groove 111b, the opposite ends of the elastic clamping member 12 are clamped between the housing 111 and the protective cover 112 to achieve fixation of the elastic clamping member 12. The first sub-channel 111a and the second sub-channel 112a are connected through the receiving groove 111b, so that when the wave-shifting optical fiber passes through the insertion channel 11c, the elastic clamping member 12 clamps the wave-shifting optical fiber.

[0048] In some other embodiments, a first sub-groove is formed on the side of the housing 111 near the second sub-channel 112a, and a second sub-groove is formed on the side of the protective cover 112 near the first sub-channel 111a. The first sub-channel 111a and the second sub-channel 112a are connected through the first sub-groove and the second sub-groove. Some of the elastic clamping members 12 are disposed in the first sub-groove, and other elastic clamping members 12 are disposed in the second sub-groove, so as to realize the clamping of the wave-shifting optical fiber by the elastic clamping members 12.

[0049] In one embodiment, please refer to Figure 4 and in conjunction with reference Figure 2 The elastic clamping member 12 has a wire passage 12a inside. The elastic clamping member 12 gradually contracts axially from opposite ends toward the middle to form a clamping part 12b. When the wave-shifting optical fiber passes through the wire passage 12a, the clamping part 12b clamps the periphery of the wave-shifting optical fiber. That is, the size of the wire passage 12a gradually decreases axially from opposite ends toward the middle, similar to an hourglass shape, and is a fixing member that can undergo elastic deformation. Thus, the size is minimized at the clamping part 12b to achieve clamping of the wave-shifting optical fiber. When assembling the wave-shifting fiber, the wave-shifting fiber first passes through the second sub-channel 112a of the protective cover 112, and then passes through the wire passage 12a of the elastic clamp 12. The clamping part 12b clamps the surface of the wave-shifting fiber to increase the clamping force on the wave-shifting fiber. Under the action of external force, the wave-shifting fiber passes through the first sub-channel 111a of the housing 111 and couples with the surface of the photoelectric conversion element. The overall angle and position can ensure the maximum transmission of light. The coupling device 10 can realize the accurate positioning of the wave-shifting fiber, and is free to disassemble and assemble, with good repeatability and good optical sealing.

[0050] The aperture of the receiving groove 111b can be determined according to the external dimensions of the elastic clamping member 12. In one embodiment, the aperture of the receiving groove 111b is 1.2mm-1.8mm. For example, the aperture of the receiving groove 111b can be 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, or 1.8mm. The receiving groove 111b within this aperture range can, to a certain extent, prevent the elastic clamping member 12 from falling out.

[0051] The selection of the inner diameter of the elastic clamp 12 should satisfy the following conditions: it should provide sufficient clamping force for the wave-shifting optical fiber passing through the cable channel 12a, without damaging the surface of the wave-shifting optical fiber. For example, the inner diameter of the elastic clamp 12 is 1.0 mm.

[0052] In one embodiment, please refer to Figure 4 The sidewall of the elastic clamping member 12 is broken to form an opening groove 12c, which extends axially. That is, the elastic clamping member 12 forms an opening groove 12c that penetrates the circumferential sidewall of the elastic clamping member 12, thus enabling the elastic clamping member 12 to have a certain deformation capability.

[0053] In one embodiment, please refer to... Figure 4 The sidewall of the elastic clamp 12 forms a deformation groove 12d, which extends axially. The deformation groove 12d can improve the deformation capability of the elastic clamp 12 to a certain extent. After the wave-shifting fiber is inserted into the wire passage 12a of the elastic clamp 12, it will deform, thereby clamping the wave-shifting fiber.

[0054] In one embodiment, please refer to Figure 2 The coupling device 10 includes a sealing gasket 13, which is disposed in the insertion groove 11a and abuts against the groove wall of the insertion groove 11a. The sealing gasket 13 is provided with an insertion hole 13a corresponding to the insertion channel 11c. In this way, the surface of the photoelectric conversion element can be protected, and the light sealing of the surface of the photoelectric conversion element can be guaranteed to a certain extent, and the light between the wave-shifting optical fibers will not crosstalk.

[0055] In one embodiment, the aperture of the insertion hole 13a is smaller than the diameter of the wave-shifting fiber. This increases the resistance to the entry of the wave-shifting fiber and also serves a fixing function. In addition, it further improves the light sealing of the photoelectric conversion element surface, preventing crosstalk between the wave-shifting fibers.

[0056] During normal use, the wave-shifting fiber passes through the second sub-channel 112a of the protective cover 112 and is inserted into the wire passage 12a of the elastic clamp 12. The clamping force of the elastic clamp 12 ensures that the wave-shifting fiber will not move up, down, left, or right. The wave-shifting fiber is inserted into the first sub-channel 111a of the housing 111 and comes into contact with the surface of the photoelectric conversion element after passing through the sealing gasket 13. Due to the tight fit between the wave-shifting fiber and the first sub-channel 111a, the second sub-channel 112a, and the insertion hole 13a, as well as the limitation of the clamping force of the elastic clamp 12, the wave-shifting fiber is fixed.

[0057] When maintenance is required, the wave-shifting fiber can be gently pulled out and can be repeatedly plugged in and out. The coupling device 10 ensures light sealing, meaning that the photoelectric conversion element only receives the light entering through the wave-shifting fiber, there is no crosstalk between the wave-shifting fibers, the position and angle of the wave-shifting fibers will not twist and affect light absorption, and the wave-shifting fiber can be freely plugged in and out without affecting the accuracy of the next assembly.

[0058] In one embodiment, the thickness of the sealing gasket 13 is 1mm-3mm. Exemplarily, the thickness of the sealing gasket 13 can be, for example, 1.2mm, 1.5mm, 1.8mm, 2.0mm, 2.2mm, 2.5mm, 2.8mm, or 3.0mm. Sealing gaskets 13 within this thickness range can provide good protection and light-tightness for the photoelectric conversion element.

[0059] The specific connection method between the sealing gasket 13 and the housing 111 is not limited here. For example, the sealing gasket 13 and the housing 111 can be connected by snap-fit, adhesive bonding, fastening, or threaded connection. In this embodiment, the sealing gasket 13 is, for example, a rubber gasket, which is bonded to the bottom of the insertion groove 11a with adhesive to prevent slippage.

[0060] In one embodiment, the surface of the housing 11 is black. By making the housing 11 black, the light-shielding property of the coupling device 10 can be improved to a certain extent, preventing light leakage, and thus improving the detection accuracy of the detection system.

[0061] In one embodiment, the surface of the sealing gasket 13 is black. By making the sealing gasket 13 black, the light-blocking property of the coupling device 10 can be improved to a certain extent, preventing light leakage, and thus improving the detection accuracy of the detection system.

[0062] It should be noted that the specific material of the housing 11 is not limited here. For example, in one embodiment, the material of the housing 11 is polytetrafluoroethylene (PTFE). The use of PTFE as the material of the housing 11 is beneficial to utilizing the elasticity of PTFE itself, which can better constrain the wave-shifting optical fiber to a certain extent.

[0063] It should be noted that the shell 111 and the protective cover 112 can be made of the same material, for example, both of which are polytetrafluoroethylene. Of course, the shell 111 and the protective cover 112 can also be made of different materials.

[0064] In the description of this application, the references to terms such as "in one embodiment," "in some embodiments," "in other embodiments," "in yet another embodiment," or "exemplary," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this application. In this application, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine the different embodiments or examples described in this application, as well as the features of the different embodiments or examples.

[0065] The various embodiments / implementations provided in this application can be combined with each other without creating contradictions.

[0066] The above are merely preferred embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A coupling device between a wave-shifting optical fiber and a photoelectric conversion element, characterized in that, include: The housing has a plug slot and an opening communicating with the plug slot. The side wall of the housing opposite to the opening has at least one plug channel penetrating the side wall of the housing. The housing is connected to the photoelectric conversion element through the plug slot so that the wave-shifting optical fiber can pass through the plug channel and couple with the photoelectric conversion element. An elastic clamping member, at least a portion of which is disposed in the insertion channel, clamps the wave-shifting optical fiber under elastic force when the wave-shifting optical fiber passes through the insertion channel. The elastic clamping member has a wire passage inside. The elastic clamping member gradually contracts from opposite ends toward the middle along the axial direction to form a clamping part. When the wave-shifting optical fiber passes through the wire passage, the clamping part clamps the periphery of the wave-shifting optical fiber. The number of the plug-in channels corresponds to the number of the wave-shifting optical fibers; The sidewall of the elastic clamp is broken to form an opening groove, which extends axially.

2. The coupling device according to claim 1, characterized in that, The housing includes a shell body and a protective cover connected to the shell body. The elastic clamping member is disposed between the shell body and the protective cover. The shell body has the insertion slot and the opening. The shell body has at least one first sub-channel, and the protective cover has a second sub-channel corresponding to the first sub-channel. The first sub-channel and the second sub-channel at least partially constitute the insertion channel; and / or... The surface of the shell is black.

3. The coupling device according to claim 2, characterized in that, A receiving groove is formed on the side of the housing near the second sub-channel, and the first sub-channel and the second sub-channel are connected through the receiving groove. The elastic clamping member is disposed in the receiving groove; or, The protective cover has a receiving groove on the side near the first sub-channel, the first sub-channel and the second sub-channel are connected through the receiving groove, and the elastic clamping member is disposed in the receiving groove.

4. The coupling device according to claim 1, characterized in that, The sidewall of the elastic clamping member forms a deformation groove, which extends axially.

5. The coupling device according to claim 1, characterized in that, The coupling device includes a sealing gasket, which is disposed in the insertion groove and abuts against the groove wall. The sealing gasket is provided with an insertion hole corresponding to the insertion channel.

6. The coupling device according to claim 5, characterized in that, The diameter of the insertion hole is smaller than the diameter of the wave-shifting optical fiber.

7. The coupling device according to claim 5, characterized in that, The thickness of the sealing gasket is 1mm-3mm.

8. The coupling device according to claim 5, characterized in that, The surface of the sealing gasket is black.

9. A detection system, characterized in that, The device includes a wave-shifting optical fiber, a photoelectric conversion element, and a coupling device as described in any one of claims 1-8, wherein the photoelectric conversion element is disposed in the insertion slot, the wave-shifting optical fiber passes through the insertion channel and is coupled to the photoelectric conversion element, and the elastic clamping member clamps the wave-shifting optical fiber under the action of elastic force.

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