Optical fiber coating concentricity measuring device, equipment and system

Abstract

The invention provides an optical fiber coating concentricity measuring device, equipment and system. The optical fiber coating concentricity measuring device comprises a first scanning light source module, a second scanning light source module, a first signal receiving module and a second signal receiving module, each of the first scanning light source module and the second scanning light source module comprises a line emitting laser, a diaphragm and a linear displacement platform; wherein the first scanning light source module and the first signal receiving module are oppositely arranged, and the second scanning light source module and the second signal receiving module are oppositely arranged; the linear displacement platform in the first scanning light source module reciprocates at a constant speed along the first direction, and the linear displacement platform in the second scanning light source module reciprocates at a constant speed along the second direction, so that the measurement accuracy of the optical fiber coating concentricity is improved.

Description

Technical Field

[0001] The present application relates to the field of optical fiber technology, and in particular to a device, equipment and system for measuring the concentricity of optical fiber coating. Background Art

[0002] Optical fiber is composed of a bare fiber and a coating wrapped around its outer surface. The bare fiber produced by the optical fiber drawing machine will be coated immediately to protect its outer surface, prevent the fiber from being scratched or polluted by the environment, and maintain its original glass state. In this process, coating concentricity deviation, discontinuity or incompleteness of the coating will affect the strength of the optical fiber. Therefore, it is very important to monitor the coating concentricity online during the optical fiber preparation process.

[0003] At present, the online measurement equipment for optical fiber coating concentricity uses laser to emit light beams, which are divided into two paths perpendicular to the optical fiber axis and projected onto the optical fiber through an optical system composed of a reflector and a transmission mirror, forming light and dark interference fringes on the back of the optical fiber. When the coating layer is not eccentric, the fringes produced by the optical fiber are symmetrical with the central fringes, and the light and dark fringes are symmetrically distributed on both sides. If the coating layer is eccentric, the interference fringes are no longer symmetrically distributed with the central fringes. By observing the symmetry of the fringes, the coating concentricity can be judged.

[0004] However, the light emitting direction of the laser light beam in the above-mentioned measuring device is greatly restricted, which reduces the measurement accuracy of the optical fiber coating concentricity. Summary of the invention

[0005] The present application provides a device, equipment and system for measuring the concentricity of optical fiber coating, so as to solve the problem of low measurement accuracy of existing optical fiber coating concentricity measurement devices.

[0006] In a first aspect, the present application provides a device for measuring the concentricity of optical fiber coating, comprising:

[0007] A first scanning light source module, a second scanning light source module, a first signal receiving module, and a second signal receiving module;

[0008] The first scanning light source module and the second scanning light source module each include a line emitting laser, an aperture and a linear displacement platform;

[0009] Wherein, the first scanning light source module and the first signal receiving module are arranged opposite to each other, and the second scanning light source module and the second signal receiving module are arranged opposite to each other;

[0010] The linear displacement platform in the first scanning light source module performs reciprocating uniform motion along a first direction, and the linear displacement platform in the second scanning light source module performs reciprocating uniform motion along a second direction.

[0011] Furthermore, the first signal receiving module and the second signal receiving module are area array CCD image sensors, and the first signal receiving module and the second signal receiving module are used to receive interference fringes generated by optical fibers.

[0012] Furthermore, the measuring device further comprises an optical fiber module to be tested, and the optical fiber module to be tested comprises an optical fiber to be tested and an optical fiber channel;

[0013] Wherein, the optical fiber channel is a moving channel of the optical fiber to be tested.

[0014] Furthermore, the measuring device further comprises an image determination module, and the image determination module is used to receive interference fringes sent by the first signal receiving module and the second signal receiving module.

[0015] Furthermore, the image determination module is electrically connected to the first signal receiving module and the second signal receiving module.

[0016] Furthermore, the aperture is arranged on the linear displacement platform.

[0017] Furthermore, a beam slit is provided at the center of the aperture.

[0018] Furthermore, the width of the beam slit is smaller than the output beam width of the line-emitting laser.

[0019] In a second aspect, the present application provides a device for measuring the concentricity of optical fiber coating, comprising: a measuring platform, and a measuring device as described in any one of the first aspects and arranged on the measuring platform.

[0020] In a third aspect, the present application provides a system for measuring the concentricity of optical fiber coating, comprising: a measuring device as described in any one of the first aspects.

[0021] The present application provides an apparatus, device and system for measuring the concentricity of optical fiber coating, comprising a first scanning light source module, a second scanning light source module, a first signal receiving module and a second signal receiving module; the first scanning light source module and the second scanning light source module both comprise a line-emitting laser, an aperture and a linear displacement platform; wherein the first scanning light source module and the first signal receiving module are arranged relative to each other, and the second scanning light source module and the second signal receiving module are arranged relative to each other; the linear displacement platform in the first scanning light source module performs reciprocating uniform motion along a first direction, and the linear displacement platform in the second scanning light source module performs reciprocating uniform motion along a second direction, thereby improving the measurement accuracy of the concentricity of optical fiber coating. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0023] Figure 1 A schematic diagram of the structure of the optical fiber coating concentricity measurement device provided in the present application;

[0024] Figure 2 A schematic diagram of interference fringes measured in the optical fiber coating concentricity measurement device provided in the present application.

[0025] Reference numerals:

[0026] 100-optical fiber coating concentricity measuring device; 101-line emitting laser; 102-aperture; 103-linear displacement platform; 104-first signal receiving module; 105-second signal receiving module; 106-optical fiber channel; 107-optical fiber to be measured; 108-image determination module; 200-interference fringes; 201-first coating layer interference fringes; 202-central interference fringes; 203-second coating layer interference fringes.

[0027] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0028] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0029] The existing optical fiber coating concentricity measurement device uses a point-emitting laser with a fixed light emission direction or a limited adjustment range, which makes it impossible to effectively align the center of the optical fiber with high-speed lateral vibration. This will cause the interference fringes to shift, or the interference fringes cannot be excited for a long time, thus affecting the final measurement results. Secondly, traditional receiving screens such as frosted glass or photosensitive paper with pre-engraved scales can only be used to receive interference fringes, and usually rely on manual judgment of the spacing of the interference fringes through the naked eye. This method cannot provide sufficient accuracy, so it is impossible to accurately judge the concentricity of the optical fiber coating.

[0030] In view of the shortcomings of the prior art, the present invention proposes a new type of optical fiber coating concentricity measurement device. By using a line-emitting laser and an advanced area array CCD image sensor instead of the traditional point-emitting laser and the manual receiving screen, the laser can be precisely adjusted to ensure that the optical fiber can still be accurately aligned under high-speed vibration. In addition, the use of an automated image determination device to receive and analyze interference fringes not only solves the error problem of manual determination, but also greatly improves the accuracy and efficiency of measurement.

[0031] The technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0032] Figure 1 This is a schematic diagram of the structure of the optical fiber coating concentricity measurement device provided in this application. Figure 1 As shown, the optical fiber coating concentricity measuring device 100 comprises:

[0033] A first scanning light source module, a second scanning light source module, a first signal receiving module 104 and a second signal receiving module 105 .

[0034] The main tasks of the first scanning light source module and the second scanning light source module are to emit laser and scan along a certain path to irradiate the coating layer of the optical fiber 107 to be tested. The first scanning light source module and the second scanning light source module will scan and irradiate the optical fiber coating layer from different directions. Specifically, the first scanning light source module and the second scanning light source module both include a line emitting laser 101, an aperture 102 and a linear displacement platform 103.

[0035] The line-emitting laser 101 is used to emit laser light with a specific wavelength and power. The function of the laser is to emit laser light to illuminate the coating layer of the optical fiber 107 to be tested, thereby generating interference. Specifically, the design of the line-emitting laser 101 ensures the stability and directionality of the light beam.

[0036] The function of the linear displacement platform 103 is to realize the precise movement of the laser and ensure that the laser can scan along the set trajectory. Specifically, the linear displacement platform 103 enables the laser to move back and forth at a constant speed in a certain direction through precise control to scan the entire area to be measured. Therefore, the linear displacement platform 103 is a key component to ensure the accuracy of the beam scanning.

[0037] The aperture 102 is disposed on the linear displacement platform 103 and is used to adjust and control the shape, size and irradiation area of ​​the laser beam. The design of the aperture 102 can ensure that the size and shape of the beam meet the measurement requirements and avoid the light spot being too large or too small to affect the measurement accuracy.

[0038] In this embodiment, the aperture 102 is precisely set on the linear displacement platform 103 of the first scanning light source module and the second scanning light source module, and a slit is set at the center of the aperture 102, and its width determines the fineness of the light beam. By adjusting the width of the slit, the shape of the laser beam can be adjusted to ensure that the laser beam has the required focus and distribution during the scanning process, so that the measurement of the concentricity of the optical fiber coating is more accurate, and the scanning unevenness caused by the beam being too large is avoided. At the same time, the scattering of the light spot is also reduced, so that the interference fringes are clearer and the measurement results are more accurate.

[0039] Exemplarily, the line-emitting laser 101 emits a beam with a width of L1 and transmits it in the X-axis direction. This means that the width of the laser beam is L1 and it propagates in the X-axis direction. A slit with a width of L2 is provided at the center of the aperture 102, where L2 is smaller than L1. The function of the aperture 102 is to limit the width of the laser beam from L1 to L2, so that the spot of the beam is more precise. The aperture 102 and its device are mounted on a linear displacement platform 103, allowing the laser beam to reciprocate at a uniform speed.

[0040] Specifically, the linear displacement platform 103 reciprocates along the Y-axis direction, the movement speed of the platform is v, and the movement distance is L3. The width of L3 is greater than the width of the optical fiber passing through the optical fiber channel 106, so it can cover the entire optical fiber path. When the laser beam passes through the aperture 102, the beam width is reduced to L2 due to the limitation of the aperture 102. The width of this beam is scanned within the range of movement along the Y-axis direction, the scanning range is L3, and it can completely cover the optical fiber channel 106 for the optical fiber to pass through.

[0041] Due to the reciprocating motion of the linear displacement platform 103, the laser beam with a width of L2 will scan along the range of L3 in the Y-axis direction and irradiate the optical fiber. At this time, interference fringes are generated on the surface of the optical fiber.

[0042] An array charge-coupled device (CCD) image sensor is located behind the optical fiber to capture these interference fringes. Since the optical fiber may slightly shake in the optical fiber channel 106 due to external factors (such as stress or airflow during high-speed production), the beam scanning design ensures that the scanning beam can still irradiate the optical fiber surface multiple times even if the optical fiber is slightly offset.

[0043] In a scanning cycle T, the beam with a width of L2 will scan the optical fiber at least once. The calculation formula of the cycle T is: T = 2*L3 / v. This time period ensures that during the scanning period, even if the optical fiber has a slight shake, the beam can still cover the entire optical fiber and generate stable interference fringes. These interference fringes will be transmitted to the area array CCD image sensor to determine the concentricity of the optical fiber coating.

[0044] On the other hand, the width of the beam slit is less than the output beam width of the line-emitting laser 101. The beam width output by the line-emitting laser 101 refers to the diameter or range of the laser beam emitted by the laser under specific conditions, and this beam width is usually determined by the design and output power of the laser. In the embodiment of the present application, the width of the beam slit is less than the output beam width of the line-emitting laser 101, which means that the laser beam will pass through the fine restriction of the beam slit, reduce the width and scattering of the beam, and form a more concentrated light spot, which can effectively avoid the light spot scattering caused by the laser beam being too wide or too large, so that the beam can be more accurately irradiated on the coating layer of the optical fiber 107 to be measured, ensuring the clarity and accuracy of the interference fringes, thereby improving the reliability of the measurement results. For example, it is assumed that the output beam width of the line-emitting laser 101 is 10mm, and the width of the beam slit is set to 8mm. Through this setting, after the beam passes through the slit, its actual width will be limited to less than 8mm, thereby generating a more accurate light spot. This fine beam can better adapt to the coating layer of the optical fiber 107 to be measured, and improve the accuracy of the scanning process.

[0045] The first signal receiving module 104 and the second signal receiving module 105 are used to receive the interference fringe signal reflected by the optical fiber 107 to be tested, and are usually received and processed by an area array CCD sensor. Specifically, the first signal receiving module 104 and the second signal receiving module 105 cooperate with each other to receive the interference fringes generated by the optical fiber coating, thereby obtaining the information of the coating concentricity.

[0046] On the other hand, the first scanning light source module and the first signal receiving module 104 are arranged relative to each other, which can ensure that after the laser emitted by the first scanning light source module irradiates the optical fiber to be measured 107, the interference fringes generated by reflection can be accurately received by the first signal receiving module 104. This symmetrical layout helps to optimize measurement accuracy and reduce deviation.

[0047] Similarly, the second scanning light source module and the second signal receiving module 105 are also arranged relative to each other, so that a symmetrical scanning and signal receiving structure is formed on the relative optical path. In this way, it can be ensured that the optical fiber coating layers on both sides are fully scanned and independently measured by two sets of receiving modules, further improving the accuracy and reliability of the measurement results.

[0048] Secondly, the linear displacement platform 103 in the first scanning light source module performs reciprocating uniform motion along the first direction, and the linear displacement platform 103 in the second scanning light source module performs reciprocating uniform motion along the second direction. The first direction and the second direction refer to two different directions in which the two scanning light source modules scan respectively, and the two directions are usually perpendicular to each other. For example, the first direction may be along the horizontal direction (X-axis direction), and the second direction may be along the vertical direction (Y-axis direction). In this way, the coating layer of the optical fiber can be scanned more comprehensively in two dimensions to ensure that the concentricity of each position is detected. Reciprocating uniform motion means that each of the two groups of linear displacement platforms 103 will perform uniform reciprocating motion along its respective direction. Reciprocating motion means that the platform moves in one direction for a period of time, then returns to the origin, and repeats this motion. Uniform motion ensures stability and uniformity during the scanning process, so that the light beam can scan the surface of the optical fiber evenly, thereby improving the reliability of the measurement results.

[0049] In the embodiment of the present application, the linear displacement platform 103 of the first scanning light source module can move at a constant speed in the horizontal direction (first direction) to scan the horizontal position of the optical fiber. The linear displacement platform 103 of the second scanning light source module moves at a constant speed in the vertical direction (second direction) to scan the vertical position of the optical fiber. In this way, the laser scanning will cover the entire surface of the optical fiber, and more interference fringe information will be captured through two scans, so as to more accurately analyze the concentricity of the optical fiber coating.

[0050] Furthermore, in the optical fiber coating concentricity measuring device proposed in the embodiment of the present application, the optical fiber module to be tested is an important component of the testing device, and is mainly used to fix and move the optical fiber to be tested 107 so that its relative position with the scanning light source module can be measured. Specifically, the optical fiber 107 module to be tested includes the optical fiber 107 to be tested and the optical fiber channel 106. The optical fiber 107 to be tested refers to the optical fiber that needs to be measured for coating concentricity in the present measuring device. The surface of the optical fiber is usually coated, and the concentricity of the coating layer of the optical fiber 107 to be tested needs to be accurately detected. The optical fiber channel 106 is a structure for moving the optical fiber 107 to be tested, which ensures that the optical fiber can be accurately moved along a preset path during the test. The optical fiber channel 106 is usually designed to have a certain mechanical precision, which can stably control the movement of the optical fiber and prevent the optical fiber from deviating from the scanning area during movement.

[0051] Exemplarily, the optical fiber 107 module to be tested accurately positions the optical fiber 107 to be tested through the optical fiber channel 106, and enables the optical fiber to move smoothly along a smooth track in the scanning area. By precisely controlling the movement of the optical fiber, it is ensured that the relative relationship between its position and the light source remains consistent. For example, the smooth movement of the optical fiber can be controlled by an electric or mechanical device, such as a stepper motor or a servo system, and finally combined with feedback control to achieve smooth movement.

[0052] Furthermore, the measuring device further comprises an image determination module 108, which is used to receive interference fringe signals sent by the first signal receiving module 104 and the second signal receiving module 105, and process the interference fringe signals to determine the concentricity of the optical fiber coating.

[0053] The image determination module 108 is mainly responsible for converting the received interference fringe signal into image data, performing image processing, determining the concentricity of the coating layer, and accurately measuring the quality of the optical fiber coating layer by analyzing the morphology and changes of the interference fringe. For example, the image determination module 108 can use computer vision algorithms, combined with image recognition technology, to analyze the received interference fringes and extract concentricity related information, i.e., fringe analysis and other technologies, to determine the high-precision coating concentricity measurement results.

[0054] Furthermore, the image determination module 108 is electrically connected to the first signal receiving module 104 and the second signal receiving module 105. The electrical connection means that the image determination module 108 receives the interference fringe signals from the first and second signal receiving modules 105 through wireless connection technology to ensure the accuracy and real-time performance of the signals. Through this electrical connection, the image determination module 108 can receive the interference fringe data captured by the signal receiving module in real time and perform real-time processing, thereby reducing the delay of signal transmission and ensuring the real-time performance and accuracy of image processing.

[0055] The optical fiber coating concentricity measuring device provided in the embodiment of the present application can accurately measure the concentricity of the optical fiber coating. By setting a first scanning light source module and a second scanning light source module, as well as a corresponding signal receiving module, a full scan of the optical fiber to be measured is achieved by using the uniform reciprocating motion of the linear displacement platform in two directions. The optical fiber to be measured moves precisely through the optical fiber channel to ensure stable irradiation of the laser beam. At the same time, the image determination module receives and processes the interference fringes sent by the signal receiving module, and determines the concentricity using precise image analysis technology. The design of the beam slit set in the aperture and the center makes the laser beam more refined and stable, further improving the accuracy of the scanning and the accuracy of the measurement results. The overall design makes the present invention efficient, accurate and reliable, and is suitable for quality control and detection in optical fiber production.

[0056] Figure 2 This is a schematic diagram of interference fringes measured in the optical fiber coating concentricity measurement device provided in this application. Figure 2As shown, the interference fringe schematic diagram is the interference fringe 200 received by the area array CCD image sensor, including the first coating layer interference fringe 201, the central interference fringe 202 and the second coating layer interference fringe 203, wherein A and B represent the center distance between the first coating layer interference fringe 201 and the central interference fringe 202, and the central interference fringe 202 and the second coating layer interference fringe 203, respectively.

[0057] Among them, the first coating layer interference fringe 201 represents a position of the interference fringe of the optical fiber coating layer, the central interference fringe 202 represents the middle position of the coating layer in the scanning area, and the second coating layer interference fringe 203 is another interference fringe representing the coating layer, which is located on the other side of the central interference fringe 202.

[0058] Specifically, based on the data from the area array CCD image sensor, the ratio between A and B is calculated to determine the concentricity of the optical fiber coating. For example, if A / B is between 0.9 and 1.1, the concentricity of the optical fiber coating in the Y-axis direction is normal. If A / B is not between 0.9 / 1.1, it is considered that the concentricity of the optical fiber coating is too large, and an alarm signal will be output, indicating that the optical fiber coating is unqualified.

[0059] It should be noted that when measuring, the coating concentricity will first be detected along the Y-axis direction of the optical fiber. The area array CCD image sensor will be used to detect the distribution of the coating on the Y-axis and calculate the ratio of A and B. If the ratio does not meet the standard, it will indicate that the optical fiber coating is unqualified. In addition to the Y-axis direction, the coating concentricity monitoring in the X-axis direction can also be performed based on a similar principle. The detection along the X-axis direction is the same as the detection principle along the Y-axis, except that the direction has changed. This multi-dimensional monitoring method ensures the consistency and high quality of the optical fiber coating in all directions.

[0060] The concentricity measurement method in the optical fiber coating concentricity measurement device provided in the embodiment of the present application is to judge the coating concentricity by comparing the center spacing A between the first coating layer interference fringe and the central interference fringe, and the center spacing B between the central interference fringe and the second coating layer interference fringe. By calculating the A / B ratio to determine whether the concentricity of the optical fiber coating is normal, the quality of the optical fiber product can be effectively guaranteed, and the consistency and accuracy of the coating can be ensured.

[0061] The present application also provides a device for measuring the concentricity of optical fiber coating, which includes a measuring platform, and the above-mentioned optical fiber coating concentricity measuring device is installed on the platform. In this device, the measuring platform provides physical support for all measuring components and ensures that the components can work together on the same platform.

[0062] Specifically, the measuring platform is the core part of the device and is used to fix all other components (such as the first scanning light source module, the second scanning light source module, the first signal receiving module, and the second signal receiving module). The design of the measuring platform needs to ensure the stability and accuracy of the device, reduce external vibration and interference, and ensure the reliability of the measurement results.

[0063] This optical fiber coating concentricity measurement equipment realizes accurate detection of optical fiber coating concentricity through the laser interferometer, CCD sensor and other measurement components installed on the measurement platform. The measurement platform provides stable support to ensure that the equipment can operate stably for a long time in a high-speed production environment and provide high-precision measurement results.

[0064] The present application also provides a fiber coating concentricity measurement system, which is a collection of one or more fiber coating concentricity measurement devices. The core function of the system is to accurately detect the concentricity of the fiber coating through devices including laser interferometers, area array CCD image sensors, image determination systems, etc. Through these devices, the measurement system can monitor the coating of each optical fiber in real time on the production line, automatically complete the measurement and judgment of the coating concentricity, and send out an alarm signal when unqualified optical fibers are detected, providing quality control on the production line.

[0065] In addition, unless otherwise specified, each functional unit / module in each embodiment of the present application may be integrated into one unit / module, each unit / module may exist physically separately, or two or more units / modules may be integrated together. The above-mentioned integrated unit / module may be implemented in the form of hardware or in the form of a software program module.

[0066] If the integrated unit / module is implemented in the form of hardware, the hardware may be a digital circuit, an analog circuit, etc. The physical implementation of the hardware structure includes but is not limited to transistors, memristors, etc. If not otherwise specified, the processor may be any appropriate hardware processor, such as a CPU, a GPU, an FPGA, a DSP, and an ASIC, etc. If not otherwise specified, the storage unit may be any appropriate magnetic storage medium or magneto-optical storage medium, such as a resistive random access memory RRAM (Resistive Random Access Memory), a dynamic random access memory DRAM (Dynamic Random Access Memory), a static random access memory SRAM (Static Random-Access Memory), an enhanced dynamic random access memory EDRAM (Enhanced Dynamic Random Access Memory), a high-bandwidth memory HBM (High-Bandwidth Memory), a hybrid memory cube HMC (Hybrid Memory Cube), etc.

[0067] If the integrated unit / module is implemented in the form of a software program module and sold or used as an independent product, it can be stored in a computer-readable memory. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art or all or part of the technical solution, can be embodied in the form of a software product, which is stored in a memory and includes several instructions for a computer device (which can be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the various embodiments of the present application. The aforementioned memory includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, disk or optical disk and other media that can store program codes.

[0068] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the invention disclosed herein. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0069] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A device for measuring the concentricity of optical fiber coating, characterized in that: include: A first scanning light source module, a second scanning light source module, a first signal receiving module, and a second signal receiving module; The first scanning light source module and the second scanning light source module each include a line emitting laser, an aperture and a linear displacement platform; Wherein, the first scanning light source module and the first signal receiving module are arranged opposite to each other, and the second scanning light source module and the second signal receiving module are arranged opposite to each other; The linear displacement platform in the first scanning light source module performs reciprocating uniform motion along a first direction, and the linear displacement platform in the second scanning light source module performs reciprocating uniform motion along a second direction.

2. The measuring device according to claim 1, characterized in that The first signal receiving module and the second signal receiving module are area array CCD image sensors, and the first signal receiving module and the second signal receiving module are used to receive interference fringes generated by optical fibers.

3. The measuring device according to claim 1, characterized in that The measuring device further comprises an optical fiber module to be tested, wherein the optical fiber module to be tested comprises an optical fiber to be tested and an optical fiber channel; Wherein, the optical fiber channel is a moving channel of the optical fiber to be tested.

4. The measuring device according to any one of claims 1 to 3, characterized in that: The measuring device further includes an image determination module, and the image determination module is used to receive interference fringes sent by the first signal receiving module and the second signal receiving module.

5. The measuring device according to claim 4, characterized in that The image determination module is electrically connected to the first signal receiving module and the second signal receiving module.

6. The measuring device according to any one of claims 1 to 3, characterized in that: The aperture is arranged on the linear displacement platform.

7. The measuring device according to any one of claims 1 to 3, characterized in that: A beam slit is arranged at the center of the aperture.

8. The measuring device according to claim 7, characterized in that The width of the beam slit is smaller than the output beam width of the line-emitting laser.

9. A device for measuring the concentricity of optical fiber coating, characterized in that: include: A measuring platform, and a measuring device according to any one of claims 1 to 8 arranged on the measuring platform.

10. A system for measuring the concentricity of optical fiber coating, characterized in that: include: The measuring device according to any one of claims 1 to 8.

Images