A method and system for precise measurement of fiber core pitch in fiber arrays

Abstract

This invention discloses a method and system for precise measurement of fiber optic array core pitch. The method includes: determining a first distance by using a distance sensor to determine the distance between the end face of the fiber optic array and a microscope objective; determining a reference transmission power based on the first distance when the first distance is within a preset distance range, and determining a transmission power set based on the reference transmission power; controlling the fiber optic array to emit outgoing light using a fiber optic transmitting device with the transmission power set; filtering the outgoing light using a filtering module to obtain target outgoing light, which is the outgoing light corresponding to the first and second adjacent fiber cores in the fiber optic array; magnifying the spot of the target outgoing light using the microscope objective and imaging it on a CCD array to obtain multiple spot images; each spot image includes two spots; and determining the target core pitch based on the multiple spot images using the controller. This invention enables precise measurement of fiber core pitch.

Description

Technical Field

[0001] This invention relates to the field of optical communication technology, and specifically to a method and system for precise measurement of fiber core pitch in optical fiber arrays. Background Technology

[0002] Fiber Arrays (FAs) are devices that fix multiple optical fibers in a specific arrangement on a substrate. FAs are primarily used to achieve high-density, high-parallelism optical interconnects. As a crucial component of optical interconnects, the high density and high parallelism of FAs have broadened the applications of optical interconnect technology. However, in FAs, the fiber core pitch is a critical parameter, directly affecting the coupling efficiency between fibers and the signal transmission quality. Therefore, accurately measuring the fiber core pitch of a FA is of great significance. Summary of the Invention

[0003] This invention provides a method and system for precise measurement of fiber optic array core pitch. When the distance between the end face of the fiber optic array and the microscope objective lens meets the optimal core pitch measurement conditions, the optimal transmission power corresponding to the distance between the end face of the fiber optic array and the microscope objective lens is determined. A light spot image is generated with a uniformly and gradually varying transmission power centered on the optimal transmission power. The measurement error of the fiber core can be synchronized into the light spot, and the error of the fiber core position can be constrained based on the multiple light spot images, thereby reducing the core pitch measurement error and improving the accuracy of the core pitch measurement.

[0004] In a first aspect, embodiments of the present invention provide a method for precise measurement of fiber optic array core pitch, applied to a fiber optic array core pitch precision measurement system. The fiber optic array core pitch precision measurement system includes: a fiber optic transmitting device, an optical microscopy system, a filter module, and a controller. The fiber optic transmitting device includes a fiber optic array and a distance sensor; the optical microscopy system includes: a microscope objective and a CCD array; the method includes: The distance between the end face of the fiber optic array and the microscope objective is determined by the distance sensor to obtain a first distance; When the first distance is within a preset distance range, the controller determines a reference transmission power based on the first distance, and determines a transmission power set based on the reference transmission power. The transmission power set includes multiple transmission powers arranged in ascending order, with the reference transmission power as the median value, and the difference between adjacent transmission powers is the same. The fiber optic transmitting device controls the fiber optic array to emit outgoing light using the transmission power set; The emitted light is filtered by the filter module to obtain the target emitted light, which is the emitted light corresponding to the first and second adjacent fiber cores in the fiber array. The light spot emitted from the target is magnified through the microscope objective and imaged on the CCD array to obtain multiple light spot images; each light spot image includes two light spots; The controller determines the target fiber core distance based on the multiple light spot images.

[0005] Secondly, embodiments of the present invention provide a precision measurement system for fiber optic array core pitch, comprising: a fiber optic transmitting device, an optical microscopy system, a filter module, and a controller; the fiber optic transmitting device includes a fiber optic array and a distance sensor; the optical microscopy system includes: a microscope objective and a CCD array; wherein... The fiber optic transmitting device is used to determine the distance between the end face of the fiber optic array and the microscope objective lens through the distance sensor, thereby obtaining a first distance; The controller is configured to determine a reference transmission power based on the first distance when the first distance is within a preset distance range, and to determine a transmission power set based on the reference transmission power. The transmission power set includes multiple transmission powers arranged in ascending order, with the reference transmission power as the median value, and the difference between adjacent transmission powers being the same. The optical fiber transmitting device is also used to control the optical fiber array to emit outgoing light using the transmitting power set; The filtering module is used to filter the emitted light to obtain the target emitted light, which is the emitted light corresponding to the first and second adjacent fiber cores in the fiber array. The optical microscopy system is used to magnify the spot of the light emitted from the target through the microscope objective and image it on the CCD array to obtain multiple spot images; each spot image includes two spots. The controller is also used to determine the target fiber core pitch based on the plurality of light spot images.

[0006] Implementing the embodiments of the present invention has the following beneficial effects: As can be seen, the above-mentioned method for precise measurement of fiber array core pitch is applied to a fiber array core pitch precision measurement system. This system includes a fiber optic transmitter, an optical microscope system, a filter module, and a controller. The fiber optic transmitter includes a fiber array and a distance sensor. The optical microscope system includes a microscope objective and a CCD array. The distance sensor determines the distance between the end face of the fiber array and the microscope objective, obtaining a first distance. When the first distance is within a preset range, the controller determines a reference transmission power based on this first distance. A transmission power set is then determined based on the reference transmission power. This set includes multiple transmission powers arranged in ascending order, with the reference transmission power as the median. The difference between adjacent transmission powers is the same. The fiber optic transmitter controls the fiber array to emit outgoing light using the transmission power set. The filter module filters the outgoing light to obtain the target outgoing light, which corresponds to the outgoing light from the first and second adjacent fiber cores in the fiber array. The light emitted from the target is magnified by the microscope objective and imaged on a CCD array, resulting in multiple spot images. Each spot image includes two spots. The controller determines the target fiber core pitch based on these multiple spot images. This not only detects whether the distance between the end face of the fiber array and the microscope objective meets the optimal fiber core pitch measurement conditions, but also, when the optimal fiber core pitch measurement conditions are met, determines the optimal transmission power corresponding to the distance between the end face of the fiber array and the microscope objective, i.e., the reference transmission power. Furthermore, based on this reference transmission power, a series of uniformly and gradually varying transmission powers centered on the reference transmission power are constructed to generate corresponding spot images. The final fiber core pitch is determined based on these spot images. In this way, the spot images generated by the uniformly and gradually varying transmission power centered on the reference transmission power can synchronize the fiber core measurement error to the spot, and constrain the fiber core position error based on these multiple spot images, thereby reducing the fiber core pitch measurement error and improving the accuracy of the fiber core pitch measurement. Attached Figure Description

[0007] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0008] Figure 1 This is a schematic diagram of the structure of a fiber array core pitch precision measurement system provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of an optical fiber transmitting device provided in an embodiment of the present invention; Figure 3This is a schematic diagram of the structure of an optical microscopy system provided in an embodiment of the present invention; Figure 4 This is another structural schematic diagram of a fiber array core pitch precision measurement system provided in an embodiment of the present invention; Figure 5 This is a schematic flowchart of a method for precise measurement of fiber core pitch in an optical fiber array provided by an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of a fiber array core pitch precision measuring device provided in an embodiment of the present invention; Figure 7 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present invention. Detailed Implementation

[0009] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0010] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this invention are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0011] It should be understood that the term "and / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document indicates that the preceding and following related objects are in an "or" relationship. In the embodiments of this invention, "multiple" refers to two or more.

[0012] In this invention, "at least one item" or similar expressions refer to any combination of these items, including any combination of a single item or multiple items. "One or more" means one or more, while "multiple" means two or more. For example, "at least one item" of a, b, or c can represent the following seven cases: a, b, c, a and b, a and c, b and c, a, b, and c. Each of a, b, and c can be an element or a set containing one or more elements.

[0013] In the embodiments of this invention, "connection" refers to various connection methods such as direct connection or indirect connection to achieve communication between devices. The embodiments of this invention do not impose any limitations on this.

[0014] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0015] In this embodiment of the invention, the fiber core pitch of the fiber array can be understood as the distance between the core centers of two adjacent fiber bundles in the fiber array.

[0016] The embodiments of the present invention will be described in detail below.

[0017] Please see Figure 1 , Figure 2 , Figure 3 , Figure 1 This is a schematic diagram of a fiber optic array core pitch precision measurement system provided in an embodiment of the present invention. The fiber optic array core pitch precision measurement system includes: a fiber optic transmitting device, an optical microscope system, a filter module, and a controller, as shown below. Figure 2 As shown, the fiber optic transmitting device includes a fiber optic array and a distance sensor; as Figure 3 As shown, the optical microscopy system includes a microscope objective and a CCD array.

[0018] The fiber optic array core pitch precision measurement system includes: a fiber optic transmitter, an optical microscope system, a filter module, and a controller. The fiber optic transmitter generates an optical signal. The optical microscope system amplifies the emitted light. The filter module filters the emitted light and may include filter apertures. The controller performs data processing functions.

[0019] The aforementioned fiber array core pitch precision measurement system can have the following functions: The fiber optic transmitting device is used to determine the distance between the end face of the fiber optic array and the microscope objective lens through the distance sensor, thereby obtaining a first distance; The controller is configured to determine a reference transmission power based on the first distance when the first distance is within a preset distance range, and to determine a transmission power set based on the reference transmission power. The transmission power set includes multiple transmission powers arranged in ascending order, with the reference transmission power as the median value, and the difference between adjacent transmission powers being the same. The optical fiber transmitting device is also used to control the optical fiber array to emit outgoing light using the transmitting power set; The filtering module is used to filter the emitted light to obtain the target emitted light, which is the emitted light corresponding to the adjacent first fiber core and the second fiber core in the fiber array; The optical microscopy system is used to magnify the spot of the light emitted from the target through the microscope objective and image it on the CCD array to obtain multiple spot images; each spot image includes two spots. The controller is also used to determine the target fiber core pitch based on the plurality of light spot images.

[0020] The distance sensor may include any of the following: laser distance sensor, ultrasonic distance sensor, infrared distance sensor, etc., without limitation.

[0021] The preset distance range can be set in advance or set by system default.

[0022] The distance between the end face of the fiber optic array and the microscope objective can be determined using a distance sensor, thus obtaining a first distance. When the first distance is within a preset range, it indicates that the distance between the end face of the fiber optic array and the microscope objective is under optimal fiber core pitch measurement conditions. A reference transmission power can then be determined based on the first distance. Specifically, a preset mapping relationship between distance and transmission power can be stored in advance. Based on this mapping relationship, the reference transmission power corresponding to the first distance can be determined, and then a transmission power set can be determined based on this reference transmission power. The transmission power set can include multiple transmission powers arranged in ascending order, and the number of transmission powers in the transmission power set is odd.

[0023] For example, the transmit power set includes 9 transmit powers. The multiple transmit powers can have the reference transmit power as the median value, and the difference between adjacent transmit powers is the same. For example, the transmit power set = {a1, a2, a3, a4, a5, a6, a7, a8, a9}, where a1 < a2 < a3 < a4 < a5 < a6 < a7 < a8 < a9, then the reference transmit power can be: a5. The relationship between each transmit power is as follows: a2 - a1 = a3 - a2 = a4 - a3 = a5 - a4 = a6 - a5 = a7 - a6 = a8 - a7 = a9 - a8.

[0024] Next, the optical fiber transmitting device can control the optical fiber array to emit outgoing light with the transmit power set. That is, for each transmit power, an outgoing light is generated once. The filtering module can filter the outgoing light to obtain the target outgoing light, which is the outgoing light corresponding to the adjacent first and second cores in the optical fiber array. Each transmit power corresponds to a spot image.

[0025] Next, the optical microscopy system can magnify the spot of the target outgoing light through the microscope objective lens and image it on the CCD area array to obtain multiple spot images; each spot image includes two spots, which respectively correspond to the first core and the second core. The controller can determine the target core distance based on the multiple spot images. It can not only detect whether the distance between the end face of the optical fiber array and the microscope objective lens meets the optimal core distance measurement condition, but when it meets the optimal core distance measurement condition, it can determine the optimal transmit power corresponding to the distance between the end face of the optical fiber array and the microscope objective lens, that is, the reference transmit power. It also constructs a series of transmit powers that are evenly gradually changed with the reference transmit power as the center to generate corresponding spot images with this series of transmit powers, and determines the final core distance based on these spot images. In this way, the transmit powers that are evenly gradually changed with the reference transmit power as the center generate spot images, which can synchronize the measurement error of the core into the spots, and constrain the error of the core position based on these multiple spot images, capable of reducing the core distance measurement error and improving the accuracy of core distance measurement.

[0026] In this embodiment of the invention, the fiber array core pitch precision measurement system includes: a fiber optic transmitting device, an optical microscopy system, a filter module, and a controller. The fiber optic transmitting device includes a fiber array and a distance sensor; the optical microscopy system includes a microscope objective and a CCD array. The distance sensor determines the distance between the end face of the fiber array and the microscope objective to obtain a first distance. When the first distance is within a preset distance range, the controller determines a reference transmission power based on the first distance, and determines a transmission power set based on the reference transmission power. The transmission power set includes multiple transmission powers arranged in ascending order, with the reference transmission power as the median value. The difference between adjacent transmission powers is the same. The fiber optic transmitting device controls the fiber array to emit outgoing light using the transmission power set. The filter module filters the outgoing light to obtain the target outgoing light, which is the outgoing light corresponding to the first and second adjacent fiber cores in the fiber array. The microscope objective then captures the target outgoing light. The light spot is magnified and imaged on a CCD array to obtain multiple spot images. Each spot image includes two spots. The controller determines the target fiber core pitch based on the multiple spot images. This not only detects whether the distance between the end face of the fiber array and the microscope objective meets the optimal fiber core pitch measurement conditions, but also determines the optimal transmission power corresponding to the distance between the end face of the fiber array and the microscope objective when the optimal fiber core pitch measurement conditions are met. This is the reference transmission power. Furthermore, a series of uniformly and gradually varying transmission powers centered on the reference transmission power are constructed based on this reference transmission power. The corresponding spot images are generated using this sequence of transmission powers, and the final fiber core pitch is determined based on these spot images. In this way, the spot images generated by the uniformly and gradually varying transmission power centered on the reference transmission power can synchronize the fiber core measurement error to the spot. Moreover, the error of the fiber core position is constrained based on these multiple spot images, which can reduce the fiber core pitch measurement error and improve the accuracy of fiber core pitch measurement.

[0027] In some possible embodiments, in determining the target fiber core pitch based on the plurality of light spot images, the controller is specifically configured to: Extract the spot region from each of the multiple spot images to obtain multiple sets of spot regions; Determine the edge contour of each group of light spot regions in the multiple groups of light spot regions to obtain multiple groups of edge contours; Determine the center of each of the multiple sets of edge contours to obtain multiple sets of center pairs; Map the multiple sets of center pairs to the same coordinate system; The target fiber core pitch is determined based on the multiple sets of center pairs.

[0028] In specific implementation, image segmentation algorithms can be used to extract the spot region of each spot image from multiple spot images, resulting in multiple sets of spot regions, which are the regions of interest. Then, edge contour extraction algorithms (such as Hough transform) are used to determine the edge contour of each set of spot regions, resulting in multiple sets of edge contours. The center of each set of edge contours, i.e., the geometric center, is then determined, resulting in multiple sets of center pairs. Since each spot image includes two spots corresponding to two fiber cores, and each spot corresponds to a center, each spot image corresponds to a set of center pairs. Since the fiber array core pitch precision measurement system remains unchanged, only the transmission power of the optical signal changes, affecting only the spot changes. Therefore, multiple sets of center pairs can be mapped to the same coordinate system. Finally, the target core pitch can be determined based on multiple sets of center pairs. In this way, spot images are generated with a uniformly and gradually changing transmission power centered on the reference transmission power. The measurement error of the fiber core can be synchronized to the spot, and the error of the fiber core position can be constrained based on these multiple spot images, which can reduce the core pitch measurement error and improve the accuracy of the core pitch measurement.

[0029] Furthermore, in some possible embodiments, in determining the target core pitch based on the multiple sets of center pairs, the controller is specifically configured to: The multiple sets of center pairs are divided into two sets of centers to obtain a first set of centers and a second set of centers. The first set of centers includes multiple centers corresponding to the first fiber core, and the second set of centers includes multiple centers corresponding to the second fiber core. The first target center is determined based on the first group of centers; The second group of centers is determined to determine the second target center; The target fiber core pitch is determined based on the first target center and the second target center.

[0030] In specific implementation, multiple sets of center pairs can be divided into two sets of centers, resulting in a first set of centers and a second set of centers. The first set of centers includes multiple centers corresponding to the first fiber core, and the second set of centers includes multiple centers corresponding to the second fiber core. Further, a first target center is determined based on the first set of centers, i.e., the center corresponding to the coordinates of all centers in the first set is determined, thus obtaining the first target center. Then, a second target center is determined based on the second set of centers, i.e., the center corresponding to the coordinates of all centers in the second set is determined, thus obtaining the second target center. Finally, the target fiber core pitch can be determined based on the first and second target centers. In this way, a light spot image is generated with a uniformly varying transmission power centered on the reference transmission power. The measurement error of the fiber core can be synchronized to the light spot, and the error in the fiber core position can be constrained based on these multiple light spot images. For example, the center of the light spot corresponding to the first fiber core in the multiple light spot images can be constrained, and the center of the light spot corresponding to the second fiber core in the multiple light spot images can be constrained, which can reduce the fiber core pitch measurement error and improve the accuracy of the fiber core pitch measurement.

[0031] In some possible embodiments, in determining the target fiber core pitch based on the first target center and the second target center, the controller is specifically configured to: Determine the reference distance based on the first target center and the second target center; Obtain the first pixel size of the CCD array and the first magnification parameter of the microscope objective; The target fiber core distance is determined based on the reference distance, the first pixel size, and the first magnification parameter.

[0032] In the specific implementation, since the center of the first target and the center of the second target are known, the reference distance can be determined based on the coordinates of the two centers. Then, the first pixel size of the CCD array and the first magnification parameter (e.g., magnification) of the microscope objective lens can be obtained. The target fiber core distance can be determined based on the reference distance, the first pixel size and the first magnification parameter. Specifically, the calculation method in the prior art can be referred to, and will not be elaborated here.

[0033] In some possible embodiments, in determining the target fiber core pitch based on the plurality of light spot images by the controller, the controller is specifically configured to: Extract the spot region corresponding to the first fiber core from the multiple spot images to obtain multiple first spot regions; The plurality of first light spot regions are fused together to obtain the target first light spot region; Determine the center of the first light spot region of the target to obtain the center of the first light spot; Extract the spot region corresponding to the second fiber core from the multiple spot images to obtain multiple second spot regions; The multiple second light spot regions are merged to obtain the target second light spot region; Determine the center of the target second light spot region to obtain the center of the second light spot; The target fiber core distance is determined based on the center of the first light spot and the center of the second light spot.

[0034] In a specific implementation, an image segmentation algorithm can be used to extract the spot region corresponding to the first fiber core from multiple spot images to obtain multiple first spot regions. Then, the multiple first spot regions are fused to obtain the target first spot region. That is, the spots corresponding to the first fiber core in multiple spot images can be superimposed, and the center of the target first spot region can be determined to obtain the first spot center. That is, the center of the first spot can be obtained by averaging all the coordinates of the target first spot region.

[0035] Correspondingly, an image segmentation algorithm can be used to extract the spot region corresponding to the second fiber core from multiple spot images to obtain multiple second spot regions. These multiple second spot regions are then fused to obtain the target second spot region. Next, the center of the target second spot region is determined to obtain the second spot center. That is, the spots corresponding to the second fiber core in multiple spot images can be superimposed, and the center of the target second spot region can be determined to obtain the second spot center. Finally, the target fiber core pitch can be determined based on the first spot center and the second spot center. In this way, spot images are generated with a uniformly and gradually varying transmission power centered on the reference transmission power. The measurement error of the fiber core can be synchronized to the spot. Furthermore, the error of the fiber core position can be constrained based on these multiple spot images. That is, the center of the spot corresponding to different fiber cores is constrained, which can reduce the fiber core pitch measurement error and improve the accuracy of fiber core pitch measurement.

[0036] In some possible embodiments, the fiber optic transmitting device further includes a fiber optic light source, a first lens, and a second lens, wherein, The fiber optic light source is used to generate optical signals; The first lens is used to convert the optical signal into a parallel beam and to transmit the converted optical signal to the fiber array so that the fiber array emits the outgoing light. The second lens is used to convert the outgoing light into a parallel beam and to guide the converted outgoing light to the filter module.

[0037] The first lens may include a collimating lens, and the second lens may also include a collimating lens.

[0038] Among them, such as Figure 4The fiber optic transmitting device further includes a fiber optic light source, a first lens, and a second lens. The fiber optic light source can be used to generate optical signals. The first lens is used to convert the optical signals into parallel beams and transmit the converted optical signals to the fiber optic array so that the fiber optic array emits outgoing light. The second lens is used to convert the outgoing light into parallel beams and transmit the converted outgoing light to the filter module. In this way, the outgoing light can be smoothly transmitted to the optical microscopy system and then presented on the CCD array, which facilitates the controller to accurately determine the fiber core pitch.

[0039] Please see Figure 5 , Figure 5 This is a flowchart illustrating a method for precise measurement of fiber optic array core pitch provided by an embodiment of the present invention. It is applied to a fiber optic array core pitch precision measurement system, which includes: a fiber optic transmitting device, an optical microscopy system, a filter module, and a controller. The fiber optic transmitting device includes a fiber optic array and a distance sensor; the optical microscopy system includes: a microscope objective and a CCD array; the method for precise measurement of fiber optic array core pitch includes: S501, the distance between the end face of the fiber optic array and the microscope objective is determined by the distance sensor to obtain a first distance; S502, when the first distance is within a preset distance range, the controller determines a reference transmission power based on the first distance, and determines a transmission power set based on the reference transmission power. The transmission power set includes multiple transmission powers arranged in ascending order, with the reference transmission power as the median value, and the difference between adjacent transmission powers is the same. S503, the fiber optic transmitting device controls the fiber optic array to emit outgoing light using the transmission power set; S504, the outgoing light is filtered by the filter module to obtain the target outgoing light, which is the outgoing light corresponding to the first and second adjacent fiber cores in the fiber array; S505, the light spot emitted from the target is magnified through the microscope objective and imaged on the CCD array to obtain multiple light spot images; each light spot image includes two light spots; S506, the controller determines the target fiber core pitch based on the multiple light spot images.

[0040] The specific descriptions of steps S501-S506 can be found in the descriptions of the corresponding functions in the fiber array core pitch precision measurement system, and will not be repeated here.

[0041] In some possible embodiments, the above steps, in which the controller determines the target fiber core pitch based on the plurality of light spot images, can be implemented in the following manner: Extract the spot region from each of the multiple spot images to obtain multiple sets of spot regions; Determine the edge contour of each group of light spot regions in the multiple groups of light spot regions to obtain multiple groups of edge contours; Determine the center of each of the multiple sets of edge contours to obtain multiple sets of center pairs; Map the multiple sets of center pairs to the same coordinate system; The target fiber core pitch is determined based on the multiple sets of center pairs.

[0042] In some possible embodiments, the above steps, determining the target fiber core pitch based on the multiple sets of center pairs, can be implemented in the following manner: The multiple sets of center pairs are divided into two sets of centers to obtain a first set of centers and a second set of centers. The first set of centers includes multiple centers corresponding to the first fiber core, and the second set of centers includes multiple centers corresponding to the second fiber core. The first target center is determined based on the first group of centers; The second group of centers is determined to determine the second target center; The target fiber core pitch is determined based on the first target center and the second target center.

[0043] In some possible embodiments, the above step of determining the target fiber core pitch based on the first target center and the second target center can be implemented in the following manner: Determine the reference distance based on the first target center and the second target center; Obtain the first pixel size of the CCD array and the first magnification parameter of the microscope objective; The target fiber core distance is determined based on the reference distance, the first pixel size, and the first magnification parameter.

[0044] In some possible embodiments, the above steps, in which the controller determines the target fiber core pitch based on the plurality of light spot images, can be implemented in the following manner: Extract the spot region corresponding to the first fiber core from the multiple spot images to obtain multiple first spot regions; The plurality of first light spot regions are fused together to obtain the target first light spot region; Determine the center of the first light spot region of the target to obtain the center of the first light spot; Extract the spot region corresponding to the second fiber core from the multiple spot images to obtain multiple second spot regions; The multiple second light spot regions are merged to obtain the target second light spot region; Determine the center of the target second light spot region to obtain the center of the second light spot; The target fiber core distance is determined based on the center of the first light spot and the center of the second light spot.

[0045] In some possible embodiments, the fiber optic transmitting device further includes a fiber optic light source, a first lens, and a second lens, wherein, The fiber optic light source is used to generate optical signals; The first lens is used to convert the optical signal into a parallel beam and to transmit the converted optical signal to the fiber array so that the fiber array emits the outgoing light. The second lens is used to convert the outgoing light into a parallel beam and to guide the converted outgoing light to the filter module.

[0046] The specific description of the above steps can be found in the description of the corresponding functions in the fiber array core pitch precision measurement system, and will not be repeated here.

[0047] Figure 6 This is a schematic diagram of a fiber optic array core pitch precision measurement device 600 according to an embodiment of the present invention. The fiber optic array core pitch precision measurement device 600 is applied to a fiber optic array core pitch precision measurement system, which includes: a fiber optic transmitting device, an optical microscopy system, a filtering module, and a controller. The fiber optic transmitting device includes a fiber optic array and a distance sensor; the optical microscopy system includes: a microscope objective and a CCD array; the fiber optic array core pitch precision measurement device 600 includes: a determination module 610, a control module 620, a filtering module 630, and an image acquisition unit 640, wherein... The determining module 610 is used to determine the distance between the end face of the fiber array and the microscope objective lens through the distance sensor to obtain a first distance; when the first distance is within a preset distance range, the controller determines a reference transmission power based on the first distance, and determines a transmission power set based on the reference transmission power. The transmission power set includes multiple transmission powers arranged in ascending order, with the reference transmission power as the median value, and the difference between adjacent transmission powers is the same. The control module 620 is used to control the fiber array to emit outgoing light through the fiber optic transmitting device with the transmission power set; The filtering module 630 is used to filter the outgoing light through the filtering module to obtain the target outgoing light, wherein the target outgoing light is the outgoing light corresponding to the first fiber core and the second fiber core of the adjacent fiber array; The image acquisition module 640 is used to magnify the light spot emitted from the target through the microscope objective lens and image it on the CCD array to obtain multiple light spot images; each light spot image includes two light spots; The determining module 610 is also used to determine the target fiber core distance based on the plurality of light spot images by the controller.

[0048] It is understood that the functions of each program module of the fiber array core pitch precision measuring device 600 in this embodiment can be specifically implemented according to the methods in the above method embodiments. The specific implementation process can be referred to the relevant descriptions in the above method embodiments, and will not be repeated here.

[0049] Please see Figure 7 , Figure 7 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present invention. The electronic device includes a processor, a memory, a communication interface, and one or more programs. The one or more programs are stored in the memory and configured to be executed by the processor. This electronic device is applied to a fiber optic array core pitch precision measurement system. The fiber optic array core pitch precision measurement system includes: a fiber optic transmitting device, an optical microscopy system, a filter module, and a controller. The fiber optic transmitting device includes a fiber optic array and a distance sensor; the optical microscopy system includes: a microscope objective and a CCD array; the program includes instructions for performing the following steps: The distance between the end face of the fiber optic array and the microscope objective is determined by the distance sensor to obtain a first distance; When the first distance is within a preset distance range, the controller determines a reference transmission power based on the first distance, and determines a transmission power set based on the reference transmission power. The transmission power set includes multiple transmission powers arranged in ascending order, with the reference transmission power as the median value, and the difference between adjacent transmission powers is the same. The fiber optic transmitting device controls the fiber optic array to emit outgoing light using the transmission power set; The outgoing light is filtered by the filtering module to obtain the target outgoing light, which is the outgoing light corresponding to the first and second fiber cores adjacent to each other in the fiber array; The light spot emitted from the target is magnified through the microscope objective and imaged on the CCD array to obtain multiple light spot images; each light spot image includes two light spots; The controller determines the target fiber core distance based on the multiple light spot images.

[0050] The electronic device can perform some or all of the steps of any of the above methods. The electronic device may include the fiber array core pitch precision measuring device. The details of the functions implemented by the instructions of the electronic device can be referred to the corresponding description above, and will not be repeated here.

[0051] Electronic devices may include servers, control platforms, or optical testing equipment, etc., without limitation.

[0052] This invention also provides a computer storage medium storing a computer program for electronic data interchange, which causes a computer to perform some or all of the steps of any of the methods described in the above method embodiments.

[0053] This invention also provides a computer program product, which includes a non-transitory computer-readable storage medium storing a computer program operable to cause a computer to perform some or all of the steps of any of the methods described in the above method embodiments. This computer program product can be a software installation package.

[0054] It should be noted that, for the sake of simplicity, the foregoing method embodiments are all described as a series of actions. However, those skilled in the art should understand that the present invention is not limited to the described order of actions, because according to the present invention, some steps can be performed in other orders or simultaneously. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to the present invention.

[0055] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0056] In the several embodiments provided by this invention, it should be understood that the disclosed apparatus can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of the units described above is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between devices or units may be electrical or other forms.

[0057] The units described above as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0058] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0059] If the aforementioned integrated units are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage device (CMD). Based on this understanding, the technical solution of this invention, in essence, 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. This computer software product is stored in a memory and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this invention. The aforementioned memory includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0060] Those skilled in the art will understand that all or part of the steps in the various methods of the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage device, which may include: a flash drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, etc.

[0061] The embodiments of the present invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A method for precise measurement of fiber core pitch in an optical fiber array, characterized in that, An application is made in a precision measurement system for fiber optic array core pitch, comprising: a fiber optic transmitting device, an optical microscopy system, a filter module, and a controller; the fiber optic transmitting device includes a fiber optic array and a distance sensor; the optical microscopy system includes: a microscope objective and a CCD array; the precision measurement method for fiber optic array core pitch includes: The distance between the end face of the fiber optic array and the microscope objective is determined by the distance sensor to obtain a first distance; When the first distance is within a preset distance range, the controller determines a reference transmission power based on the first distance, and determines a transmission power set based on the reference transmission power. The transmission power set includes multiple transmission powers arranged in ascending order, with the reference transmission power as the median value, and the difference between adjacent transmission powers being the same. The transmission power set includes the reference transmission power. The fiber optic transmitting device controls the fiber optic array to emit outgoing light using the transmission power set; that is, the number of outgoing light emitted corresponds to the number of transmission power sets. The emitted light is filtered by the filter module to obtain the target emitted light, which is the emitted light corresponding to the first and second adjacent fiber cores in the fiber array. The light spot emitted from the target is magnified through the microscope objective and imaged on the CCD array to obtain multiple light spot images; each light spot image includes two light spots; the multiple light spot images correspond one-to-one with the emission power of the emission power concentration; The controller determines the target fiber core distance based on the multiple light spot images.

2. The method for precise measurement of fiber array core pitch according to claim 1, characterized in that, The step of determining the target fiber core pitch based on the multiple light spot images by the controller includes: Extract the spot region from each of the multiple spot images to obtain multiple sets of spot regions; Determine the edge contour of each group of light spot regions in the multiple groups of light spot regions to obtain multiple groups of edge contours; Determine the center of each of the multiple sets of edge contours to obtain multiple sets of center pairs; Map the multiple sets of center pairs to the same coordinate system; The target fiber core pitch is determined based on the multiple sets of center pairs.

3. The method for precise measurement of fiber array core pitch according to claim 2, characterized in that, Determining the target fiber core pitch based on the multiple sets of center pairs includes: The multiple sets of center pairs are divided into two sets of centers to obtain a first set of centers and a second set of centers. The first set of centers includes multiple centers corresponding to the first fiber core, and the second set of centers includes multiple centers corresponding to the second fiber core. The first target center is determined based on the first group of centers; Determine the second target center based on the second group of centers; The target fiber core pitch is determined based on the first target center and the second target center.

4. The method for precise measurement of fiber array core pitch according to claim 3, characterized in that, Determining the target fiber core pitch based on the first target center and the second target center includes: Determine the reference distance based on the first target center and the second target center; Obtain the first pixel size of the CCD array and the first magnification parameter of the microscope objective; The target fiber core distance is determined based on the reference distance, the first pixel size, and the first magnification parameter.

5. The method for precise measurement of fiber optic array core pitch according to claim 1, characterized in that, The step of determining the target fiber core pitch based on the multiple light spot images by the controller includes: Extract the spot region corresponding to the first fiber core from the multiple spot images to obtain multiple first spot regions; The plurality of first light spot regions are fused together to obtain the target first light spot region; Determine the center of the first light spot region of the target to obtain the center of the first light spot; Extract the spot region corresponding to the second fiber core from the multiple spot images to obtain multiple second spot regions; The multiple second light spot regions are merged to obtain the target second light spot region; Determine the center of the target second light spot region to obtain the center of the second light spot; The target fiber core distance is determined based on the center of the first light spot and the center of the second light spot.

6. The method for precise measurement of fiber optic array core pitch according to any one of claims 1-5, characterized in that, The fiber optic transmitting device further includes a fiber optic light source, a first lens, and a second lens, wherein... The fiber optic light source is used to generate optical signals; The first lens is used to convert the optical signal into a parallel beam and to transmit the converted optical signal to the fiber array so that the fiber array emits the outgoing light. The second lens is used to convert the outgoing light into a parallel beam and to guide the converted outgoing light to the filter module.

7. A precision measurement system for fiber optic array core pitch, characterized in that, The fiber array core pitch precision measurement system includes: a fiber optic transmitting device, an optical microscopy system, a filter module, and a controller. The fiber optic transmitting device includes a fiber array and a distance sensor; the optical microscopy system includes: a microscope objective and a CCD array; wherein... The fiber optic transmitting device is used to determine the distance between the end face of the fiber optic array and the microscope objective lens through the distance sensor, thereby obtaining a first distance; The controller is configured to determine a reference transmission power based on the first distance when the first distance is within a preset distance range, and to determine a transmission power set based on the reference transmission power. The transmission power set includes multiple transmission powers arranged in ascending order, with the reference transmission power as the median value, and the difference between adjacent transmission powers being the same. The transmission power set includes the reference transmission power. The optical fiber transmitting device is also used to control the optical fiber array to emit outgoing light with the transmission power set, that is, the number of outgoing lights generated is equal to the number of transmission powers. The filtering module is used to filter the emitted light to obtain the target emitted light, which is the emitted light corresponding to the first and second adjacent fiber cores in the fiber array. The optical microscopy system is used to magnify the light spot emitted from the target through the microscope objective and image it on the CCD array to obtain multiple light spot images; each light spot image includes two light spots; the multiple light spot images correspond one-to-one with the emission power of the emission power concentration; The controller is also used to determine the target fiber core pitch based on the plurality of light spot images.

8. The fiber array core pitch precision measurement system according to claim 7, characterized in that, In determining the target fiber core pitch based on the plurality of light spot images, the controller is specifically configured to: Extract the spot region from each of the multiple spot images to obtain multiple sets of spot regions; Determine the edge contour of each group of light spot regions in the multiple groups of light spot regions to obtain multiple groups of edge contours; Determine the center of each of the multiple sets of edge contours to obtain multiple sets of center pairs; Map the multiple sets of center pairs to the same coordinate system; The target fiber core pitch is determined based on the multiple sets of center pairs.

9. The fiber array core pitch precision measurement system according to claim 8, characterized in that, In determining the target fiber core pitch based on the multiple sets of center pairs, the controller is specifically configured to: The multiple sets of center pairs are divided into two sets of centers to obtain a first set of centers and a second set of centers. The first set of centers includes multiple centers corresponding to the first fiber core, and the second set of centers includes multiple centers corresponding to the second fiber core. The first target center is determined based on the first group of centers; Determine the second target center based on the second group of centers; The target fiber core pitch is determined based on the first target center and the second target center.

10. The fiber array core pitch precision measurement system according to claim 9, characterized in that, In determining the target fiber core pitch based on the first target center and the second target center, the controller is specifically configured to: Determine the reference distance based on the first target center and the second target center; Obtain the first pixel size of the CCD array and the first magnification parameter of the microscope objective; The target fiber core distance is determined based on the reference distance, the first pixel size, and the first magnification parameter.

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