Calibration device and manufacturing method for fiber optic end face inspection instrument

Abstract

This invention discloses a calibration device and manufacturing method for a fiber optic end-face inspection instrument. The device includes multiple calibrators, each comprising a transparent substrate. A calibration area and a field of view are etched onto the substrate. The calibration area is located within the field of view and has a first coating. Simulated defect components are located within the calibration area and have a second coating. The multiple calibrators include a first calibrator for calibrating measurement errors and repeatability, a second calibrator for calibrating the discrimination compliance of the defect location area, and a third calibrator for calibrating the discrimination compliance of the field of view. The manufacturing method includes fabricating a metal coating on the transparent substrate; etching simulated defect components on the surface of the substrate with the metal coating using laser lithography; cutting the substrate to the target size to obtain the calibrators; and multiple calibrators with different simulated defect components constituting the fiber optic end-face inspection instrument calibration device. This device enables accurate and efficient calibration of the fiber optic end-face inspection instrument.

Description

Technical Field

[0001] This invention relates to the field of optical fiber testing equipment calibration technology, and in particular to a calibration device and manufacturing method for an optical fiber end-face testing instrument. Background Technology

[0002] Surface scratches on the ceramic ferrule end face of fiber optic connectors can alter the transmission path of optical signals, increasing signal attenuation and reflection, thus affecting the transmission quality. Therefore, fiber optic end-face inspection instruments are commonly used to analyze defects on the fiber optic end faces of fiber optic connectors. The inspection accuracy of the fiber optic end-face inspection instrument is crucial to the defect analysis results.

[0003] However, there is currently no dedicated calibrator for checking the measurement performance of fiber optic end-face inspection instruments; the status of the instrument can only be verified using fiber optic connectors. However, fiber optic end-face defects in connectors are randomly generated, and their shape and size cannot be controlled, making accurate measurement difficult and hindering accurate and efficient calibration of the fiber optic end-face inspection instrument. Summary of the Invention

[0004] The purpose of this invention is to provide a calibration device for an optical fiber end-face inspection instrument and a method for manufacturing the calibration device, which can accurately and efficiently calibrate the optical fiber end-face inspection instrument.

[0005] The technical solutions for achieving the above objectives include the following:

[0006] The fiber optic end-face inspection instrument calibration device includes:

[0007] Multiple calibrators, each calibrator including a transparent substrate, on which a calibration area and a field of view are etched, the calibration area being located within the field of view, the field of view having a first coating, and an etched simulated defect component having a second coating;

[0008] The plurality of calibrators includes a first calibrator for calibrating measurement errors and measurement repeatability, a second calibrator for calibrating the conformity of the defect area, and a third calibrator for calibrating the conformity of the field of view.

[0009] In one embodiment, the first calibrator includes a first measurement calibrator for calibrating the measurement error and measurement repeatability of the spot diameter and a second measurement calibrator for calibrating the measurement error and measurement repeatability of the scratch linewidth.

[0010] In one embodiment, the simulated defect component in the first measurement calibrator includes a plurality of circular blocks, which are imaged as circular spots in the fiber optic end-face inspection instrument, and the diameter of the circular spots is one of 2μm, 3μm, 5μm, and 25μm.

[0011] In one embodiment, the simulated defect component in the second measurement calibrator includes a plurality of rectangular blocks that are imaged as scratches in an optical fiber end-face inspection instrument, the scratches having a width of 3 μm or 4 μm.

[0012] In one embodiment, the second calibrator includes a first region calibrator for calibrating the discriminative conformity of the area where the scratch is located and a second region calibrator for calibrating the discriminative conformity of the area where the spot is located.

[0013] In one embodiment, the calibration area of ​​the first region calibrator has a single-mode fiber core area, a single-mode cladding area, a multimode fiber core area, and a multimode cladding area. The simulated defect component of the first region calibrator includes at least four rectangular blocks. One rectangular block is distributed in the single-mode fiber core area, the single-mode cladding area, the multimode fiber core area, and the multimode cladding area, and is imaged as a cross-region scratch in the fiber end-face inspection instrument. Another rectangular block is distributed in the single-mode fiber core area and is imaged as a single-mode fiber core area scratch in the fiber end-face inspection instrument. A third rectangular block is distributed in the single-mode cladding area and the multimode fiber core area and is imaged as a single-mode cladding area scratch or a multimode fiber core area scratch in the fiber end-face inspection instrument. Finally, a rectangular block is distributed in the multimode cladding area and is imaged as a multimode cladding area scratch in the fiber end-face inspection instrument.

[0014] In one embodiment, the calibration area of ​​the second region calibrator has a single-mode fiber core region, a single-mode cladding region, a multimode fiber core region, and a multimode cladding region. The simulated defect component of the second region calibrator includes at least five circular blocks. One circular block is distributed at the boundary of the single-mode fiber core region and is imaged as a single-mode cross-region spot in the fiber end-face inspection instrument; one circular block is distributed at the boundary of the multimode fiber core region and is imaged as a multimode cross-region spot in the fiber end-face inspection instrument; one circular block is distributed in the single-mode fiber core region and is imaged as a single-mode fiber core region spot in the fiber end-face inspection instrument; one circular block is distributed in both the single-mode cladding region and the multimode fiber core region and is imaged as either a single-mode cladding region spot or a multimode fiber core region spot in the fiber end-face inspection instrument; and one circular block is distributed in the multimode cladding region and is imaged as a multimode cladding region spot in the fiber end-face inspection instrument.

[0015] In one embodiment, the third calibrator is a large field-of-view calibrator, and the simulated defect component in the large field-of-view calibrator includes a circular block and a plurality of triangular blocks, the triangular blocks being distributed circumferentially along the circular block.

[0016] In one embodiment, a standard field-of-view calibrator is also included, the standard field-of-view calibrator comprising a transparent substrate on which a calibration region is etched, the calibration region having a third coating.

[0017] The present invention also provides a method for manufacturing a calibration device for an optical fiber end-face inspection instrument, comprising:

[0018] A metallic coating is fabricated on a transparent substrate;

[0019] On the surface of a substrate with a metal coating, laser lithography is used to etch and form a simulated defect component, which is used to simulate fiber end face defects of an optical fiber connector.

[0020] The substrate is cut into the target size to obtain a calibrator. Multiple calibrators with different simulated defect components constitute the calibration device for the fiber optic end face inspection instrument.

[0021] The technical solution provided by this invention has the following advantages and effects:

[0022] Simulated defect components are etched using laser lithography, and their values ​​can be accurately traced using a scanning electron microscope. Different simulated defect components can be used to calibrate various aspects of the fiber optic end-face inspection instrument, including measurement error and repeatability, defect location discrimination compliance, and field-of-view discrimination compliance. Therefore, accurate and efficient calibration of the fiber optic end-face inspection instrument can be achieved. Attached Figure Description

[0023] The accompanying drawings illustrate specific examples of the technical solutions described in this invention and, together with the detailed embodiments, form part of the specification, serving to explain the technical solutions, principles, and effects of this invention.

[0024] Unless otherwise specified or defined, the same reference numerals in different figures represent the same or similar technical features, and different reference numerals may be used to represent the same or similar technical features.

[0025] Figure 1 This is a schematic diagram of the base;

[0026] Figure 2 This is a schematic diagram of the first measurement calibrator in an embodiment of the present invention;

[0027] Figure 3 This is a schematic diagram of the second measurement calibrator in an embodiment of the present invention;

[0028] Figure 4 This is a schematic diagram of the first region calibrator in an embodiment of the present invention;

[0029] Figure 5 This is a schematic diagram of the second region calibrator in an embodiment of the present invention;

[0030] Figure 6 This is a schematic diagram of a large field-of-view calibrator in an embodiment of the present invention;

[0031] Figure 7 for Figure 6Enlarged view of region A in the middle;

[0032] Figure 8 This is a schematic diagram of a standard field-of-view calibrator in an embodiment of the present invention;

[0033] Figure 9 A flowchart illustrating the fabrication method of a calibration device for an optical fiber end-face inspection instrument.

[0034] Explanation of reference numerals in the attached figures:

[0035] 10. Base

[0036] 20. Substrate; 21. Calibration area; 211. Single-mode fiber core area; 212. Single-mode cladding area; 213. Multimode fiber core area; 214. Multimode cladding area; 22. Field of view.

[0037] 30. Simulate defective components.

[0038] 40. First measuring calibrator,

[0039] 50. Second measuring calibrator,

[0040] 60. First area calibrator; 61. First rectangular block; 62. Second rectangular block; 63. Third rectangular block; 64. Fourth rectangular block;

[0041] 70. Second area calibrator; 71. First circular block; 72. Second circular block; 73. Third circular block; 74. Fourth circular block; 75. Fifth circular block.

[0042] 80. Wide field-of-view calibrator

[0043] 90. Standard field of view calibrator. Detailed Implementation

[0044] To facilitate understanding of the present invention, specific embodiments of the present invention will be described in more detail below with reference to the accompanying drawings.

[0045] Unless otherwise specified or defined, the terms "first," "second," etc., used in this document are for distinguishing names only and do not represent a specific number or order.

[0046] Unless otherwise stated or defined, the term “and / or” as used herein includes any and all combinations of one or more of the related listed items.

[0047] It should be noted that when a component is considered "fixed" to another component, it can be directly fixed to the other component or there can be an intervening component; when a component is considered "connected" to another component, it can be directly connected to the other component or there can be an intervening component; when a component is considered "mounted" on another component, it can be directly mounted on the other component or there can be an intervening component; when a component is considered "placed" on another component, it can be directly placed on the other component or there can be an intervening component.

[0048] To efficiently and accurately calibrate the measurement performance of a fiber optic end-face inspection instrument, this invention designs a calibration device for the instrument. Using laser lithography, different simulated defect components are etched onto different substrates to form multiple calibrators. These calibrators are then fixed to a base and inserted into the measurement holes of the fiber optic end-face inspection instrument for measurement and calibration. The base 10, as shown... Figure 1 As shown, it is made of metal with threads at the bottom and a top for securing the calibrator. After the calibrator is fixed to the base, it can be secured to the worktable of a precision instrument during traceability calibration via the threads at the bottom, facilitating traceability calibration. The fiber optic end-face inspection instrument calibration device of this invention can be used to calibrate various aspects of the measurement performance of fiber optic end-face inspection instruments, including measurement error and repeatability, defect location discrimination compliance, and field-of-view discrimination compliance. It features accurate measurements and a wide measurement range.

[0049] Specifically, fiber optic end-face inspection instruments are mainly used for the visual inspection of the ferrules of fiber optic connectors. Fiber optic connectors are divided into single-core and multi-core types. The connector ferrules come in two sizes: φ2.5mm and φ1.25mm, made of ceramic, with a φ125μm fiber filament in the center. When observing the end face using an image, the central φ125μm fiber area appears dark, while the surrounding ceramic appears bright white. The fiber optic end-face inspection instrument is an automated measurement device. After clicking the measurement button, it searches for and focuses on the φ125μm feature circle outline within the measurement field of view, using the center of the circle as the origin. The fiber optic end-face inspection instrument identifies defects by checking the range of contrast variation among image pixels. When there is no defect, the contrast variation of each pixel within the target area is minimal; when the contrast variation exceeds a set threshold, the pixel is designated as a defect edge point.

[0050] To adapt to the above-mentioned judgment criteria, this invention innovatively designs the structure of the calibrator: the main body is a transparent substrate 20, which has a metal coating. A calibration area 21 and a field of view 22 are etched onto the substrate 20 using laser lithography. The calibration area 21 is located within the field of view 22. The field of view 22 has a first coating (e.g., chromium). When imaged by the fiber optic end-face inspection instrument, the field of view 22 appears bright white in the image, corresponding to the ceramic surrounding the connector ferrule. The calibration area 21 is a blank transparent substrate. When imaged by the fiber optic end-face inspection instrument, the calibration area 21 is a dark area, corresponding to the fiber filament, forming a background color relative to the simulated defect components. Simulated defect components 30 are etched within the calibration area 21. These simulated defect components 30 have a second coating (e.g., chromium). These simulated defect components 30 can be identified by the fiber optic end-face inspection instrument. When imaged by the fiber optic end-face inspection instrument, the simulated defect components 30 appear bright white, and the image pixel contrast change with the background color of the calibration area 21 exceeds a set threshold. That is, the simulated defect components 30 correspond to fiber end-face defects in the fiber optic connector.

[0051] This embodiment provides a fiber optic end-face inspection instrument calibration device, mainly divided into three categories: a first calibrator for calibrating measurement errors and repeatability, a second calibrator for calibrating the conformity of defect area discrimination, and a third calibrator for calibrating the conformity of field of view discrimination. The calibration areas 21 of both the first and second calibrators are 125μm circles with a transparent background, appearing dark in the image; the field of view area 22 is a 125~250μm ring, chrome-plated, appearing bright white in the image. Since the standard field of view requirement for the fiber optic end-face inspection instrument is not less than 250μm, the overall chrome-plated area is 125~250μm. Simulated defect components 30 of various shapes are etched within the calibration area 21, and the surfaces of the simulated defect components 30 are chrome-plated. The simulated defect components 30 are categorized according to their function. It should be noted that the thickness or height of the simulated defect components 30 does not affect the image during fiber optic end-face inspection imaging; therefore, the thickness of the simulated defect components 30 is not considered, only their shape.

[0052] Specifically, the first calibrator includes a first measurement calibrator for calibrating the measurement error and measurement repeatability of the spot diameter, and a second measurement calibrator for calibrating the measurement error and measurement repeatability of the scratch line width. This calibrates the measurement error and measurement repeatability from two perspectives: spot diameter and scratch line width.

[0053] like Figure 2As shown, the simulated defect component 30 of the first measurement calibrator 40 includes multiple circular blocks. When the fiber optic end-face inspection instrument images, the circular blocks are imaged as circular spots, which simulate the circular spot defects on the fiber end face of the fiber optic connector. In this embodiment, four circular blocks are included, resulting in four circular spots with diameters of 2μm, 3μm, 5μm, and 25μm, respectively. To calibrate the measurement error and repeatability of the spot diameter, the first measurement calibrator, which is embedded and fixed behind the base, is inserted into the measurement hole of the fiber optic end-face inspection instrument. The fiber optic end-face inspection instrument automatically focuses and centers, automatically measuring the diameters of the four circular spots (φ2μm, φ3μm, φ5μm, and φ25μm) at the center of the first measurement calibrator. The φ25μm circular spot is measured 10 times, and the standard deviation is calculated as the measurement repeatability of the spot diameter of the fiber optic end-face inspection instrument.

[0054] like Figure 3 As shown, the simulated defect component 30 of the second measurement calibrator 50 includes multiple rectangular blocks. These rectangular blocks are imaged as scratches in the fiber optic end-face inspection instrument, simulating scratch defects on the fiber end face of the fiber optic connector. In this embodiment, there are two rectangular blocks, symmetrically distributed around the center of the calibration area, with scratch widths of 3μm or 4μm respectively. When calibrating the scratch linewidth measurement error and measurement repeatability, the second measurement calibrator, embedded and fixed behind the base, is inserted into the measurement hole of the fiber optic end-face inspection instrument. The fiber optic end-face inspection instrument automatically focuses and centers, automatically measuring the 3μm and 4μm scratches in the second measurement calibrator. The 4μm linewidth scratch is measured repeatedly 10 times, and the standard deviation is calculated as the repeatability of the fiber optic end-face inspection instrument's scratch linewidth measurement.

[0055] According to fiber optic connector standards, single-mode fiber has a core region of φ25μm and a cladding region of φ25μm~φ125μm. Multimode fiber has a core region of φ65μm and a cladding region of φ65μm~φ125μm. Defect control in the core region is stringent, with strict limits on both the number and size of defects. In the cladding region, scratches are not restricted, and spots are only limited in size, not quantity. When a defect crosses both the core and cladding regions, the defect is segmented by region, and its size is calculated. Therefore, the accuracy of determining the defect location directly impacts product quality. Currently, not all end-face inspection instruments can segment defects by region, which requires verification.

[0056] Based on this principle, this embodiment designs a second calibrator for calibrating the conformity of the defect area, including a first area calibrator 60 for calibrating the conformity of the scratch area and a second area calibrator 70 for calibrating the conformity of the spot area. The calibration areas 21 of both the first area calibrator 60 and the second area calibrator 70 have a single-mode core area 211, a single-mode cladding area 212, a multimode core area 213, and a multimode cladding area 214. The single-mode core area 211 is a circular area with a diameter of φ25μm, the single-mode cladding area 212 is an annular area with a diameter of φ25μm to φ125μm, the multimode core area 213 is a circular area with a diameter of φ65μm, and the multimode cladding area 214 is an annular area with a diameter of φ65μm to φ125μm.

[0057] like Figure 4 As shown, the simulated defect component 30 of the first region calibrator 60 includes four rectangular blocks. The first rectangular block 61 is distributed across the single-mode fiber core region 211, the single-mode cladding region 212, and the multimode fiber core region 213 and the multimode cladding region 214. That is, the first rectangular block 61 is long enough to extend outward from the single-mode fiber core region 211 to the multimode cladding region 214, and is imaged as a cross-region scratch in the fiber end-face inspection instrument. The second rectangular block 62 is distributed across the single-mode fiber core region 211 and is imaged as a single-mode fiber core region scratch in the fiber end-face inspection instrument. The third rectangular block 6... 3. Rectangular blocks are distributed in the single-mode cladding region 212 and the multimode fiber core region 213, that is, this rectangular block is located in an annular region of φ25μm~φ65μm. Depending on the needs, it is imaged as a single-mode cladding region scratch or a multimode fiber core region scratch in the fiber end-face inspection instrument. Specifically, when the simulated fiber end-face inspection instrument inspects a single-mode fiber core, it is imaged as a single-mode cladding region scratch; when the simulated fiber end-face inspection instrument inspects a multimode fiber core, it is imaged as a multimode fiber core region scratch. A fourth rectangular block 64 is distributed in the multimode cladding region 214 and is imaged as a multimode cladding region scratch in the fiber end-face inspection instrument. It should be noted that the simulated defect component 30 of the first region calibrator 60 may also include more rectangular blocks.

[0058] like Figure 5As shown, the simulated defect component 30 of the second region calibrator 70 includes five circular blocks. The first circular block 71 is distributed at the boundary of the single-mode fiber core region 211 and is imaged as a single-mode cross-region spot in the fiber end-face inspection instrument. The second circular block 72 is distributed at the boundary of the multimode fiber core region 213 and is imaged as a multimode cross-region spot in the fiber end-face inspection instrument. The single-mode cross-region spot and the multimode cross-region spot are collectively referred to as cross-region spots. The third circular block 73 is distributed in the single-mode fiber core region 211 and is imaged as a single-mode fiber core region spot in the fiber end-face inspection instrument. The fourth circular block... Block 74 is distributed in the single-mode cladding region 212 and the multimode fiber core region 213. That is, this circular block is located within an annular region of φ25μm~φ65μm. Depending on the needs, it is imaged as a single-mode cladding region spot or a multimode fiber core region spot in the fiber end-face inspection instrument. Specifically, when the simulated fiber end-face inspection instrument inspects a single-mode fiber core, it is imaged as a single-mode cladding region spot; when the simulated fiber end-face inspection instrument inspects a multimode fiber core, it is imaged as a multimode fiber core region spot. The fifth circular block 75 is distributed in the multimode cladding region 214 and is imaged as a multimode cladding region spot in the fiber end-face inspection instrument. It should be noted that the simulated defect component 30 of the second region calibrator 70 may also include more circular blocks.

[0059] To calibrate the field-of-view discrimination compliance, this embodiment designs a large field-of-view calibrator, namely the third calibrator, such as... Figure 6 As shown, the field of view 22 of the large field-of-view calibrator 80 is rectangular and chrome-plated. Figure 6 The shaded area in the image has a field of view 22 measuring 6.4 × 2.5 mm. The simulated defect component 30 of the large field of view calibrator 80 includes a circular block and four triangular blocks, such as... Figure 7 As shown, the circular block is 10 μm in size, and the triangular blocks are distributed around its circumference. Four triangular blocks form four prominent triangular arrows around the circular hole; the intersection of these arrows indicates the location of the circular block, allowing for quick positioning. If the complete rectangular outline can be observed in the measurement image of the fiber optic end-face inspection instrument, and the central 10 μm circular hole is visible to the naked eye (i.e., the field of view is ≥ (6.4 × 2.5) mm), and the resolution is < 10 μm), it meets relevant industry requirements. It should be noted that the number of triangular blocks is not limited; it can be two, three, five, etc.

[0060] For calibration of field-of-view discrimination compliance, this embodiment also includes a standard field-of-view calibrator, such as... Figure 8 As shown, the standard field-of-view calibrator 90 includes a transparent substrate 20, on which a calibration area 21 is etched. The calibration area 21 is circular in shape with a diameter of 250 μm, and the entire surface of the calibration area 21 is chrome-plated. If a complete circular outline can be observed in the measurement image of the fiber optic end-face inspection instrument, the field of view is ≥250 μm.

[0061] Based on the aforementioned labeler, multiple calibrators for different purposes are combined to form a fiber optic end-face inspection instrument calibration device, enabling calibration of the fiber optic end-face instrument's measurement error, measurement repeatability, region discrimination compliance, and field of view. It is easy to understand that the specific number of calibrators included in the fiber optic end-face inspection instrument calibration device is not limited, but preferably at least six, enabling comprehensive calibration of various aspects such as the measurement error and repeatability of spot diameter, the measurement error and repeatability of scratch linewidth, the discrimination compliance of scratch region, the discrimination compliance of spot region, large field of view, and standard field of view.

[0062] It should be noted that although this embodiment forms the first, second, and third coatings by chromium plating on the substrate, it is not limited to chromium plating. Laser cladding technology and multi-layer composite diffusion process can also be used to form the coatings.

[0063] In summary, the fiber optic end-face inspection instrument calibration device of this embodiment uses laser lithography to etch simulated defect components. These simulated defect components can be traced using a scanning electron microscope, ensuring accurate measurement. Different simulated defect components can calibrate various aspects of the fiber optic end-face inspection instrument, including measurement error and repeatability, defect location discrimination compliance, and field-of-view discrimination compliance. Therefore, accurate and efficient calibration of the fiber optic end-face inspection instrument can be achieved.

[0064] Based on the above-mentioned fiber optic end-face inspection calibration device, such as Figure 9 As shown, this embodiment also provides a method for manufacturing a fiber optic end-face inspection instrument calibration device, including:

[0065] Step S100: Fabricate a metal coating on a transparent substrate;

[0066] Step S200: On the surface of a substrate with a metal coating, laser lithography is used to etch and form a simulated defect component, wherein the simulated defect component is used to simulate the fiber end face defect of the fiber connector.

[0067] Step S300: Cut the substrate to the target size to obtain a calibrator. Multiple calibrators with different simulated defect components constitute the fiber optic end face inspection calibration device.

[0068] Specifically, in this embodiment, a layer of chromium is plated on a transparent substrate. Using laser lithography, the remaining portion is etched to form a simulated defect component. This substrate is then cut to the target size and fixed onto a dedicated base for fiber optic end-face inspection instrument calibration. Multiple calibrators with different simulated defect components constitute the fiber optic end-face inspection instrument calibration device, used to calibrate various aspects of the instrument, including measurement error and repeatability, defect area discrimination compliance, and field-of-view discrimination compliance. The dimensional accuracy of the simulated defect components is within ±0.2μm, providing high calibration precision; and it covers the main technical specifications of the fiber optic end-face inspection instrument.

[0069] When referencing drawings, new features are explained. To avoid redundant references to drawings that would make the description less concise, features already described will not be referenced again on the drawings if the description is clear.

[0070] The purpose of the above embodiments is to reproduce and derive the technical solution of the present invention by way of example, and to fully describe the technical solution, purpose and effect of the present invention. The purpose is to enable the public to have a more thorough and comprehensive understanding of the disclosure of the present invention, and not to limit the scope of protection of the present invention.

[0071] The above embodiments are not an exhaustive list based on the present invention, and there may be many other embodiments not listed. Any substitutions and improvements made without departing from the concept of the present invention are within the protection scope of the present invention.

Claims

1. A calibration device for an optical fiber end-face inspection instrument, characterized in that, include: Multiple calibrators, each calibrator including a transparent substrate, on which a calibration area and a field of view are etched, the calibration area being located within the field of view, the field of view having a first coating, and an etched simulated defect component having a second coating; The plurality of calibrators includes a first calibrator for calibrating measurement errors and measurement repeatability, a second calibrator for calibrating the conformity of the defect area, and a third calibrator for calibrating the conformity of the field of view. The second calibrator includes a first region calibrator for calibrating the discrimination conformity of the area where the scratch is located and a second region calibrator for calibrating the discrimination conformity of the area where the spot is located; The calibration area of ​​the first region calibrator has a single-mode fiber core area, a single-mode cladding area, a multimode fiber core area, and a multimode cladding area. The simulated defect component of the first region calibrator includes at least four rectangular blocks. One rectangular block is distributed across the single-mode fiber core area, the single-mode cladding area, the multimode fiber core area, and the multimode cladding area, and is imaged as a cross-region scratch in the fiber end-face inspection instrument. Another rectangular block is distributed across the single-mode fiber core area and is imaged as a single-mode fiber core area scratch in the fiber end-face inspection instrument. A third rectangular block is distributed across the single-mode cladding area and the multimode fiber core area and is imaged as a single-mode cladding area scratch or a multimode fiber core area scratch in the fiber end-face inspection instrument. Finally, a rectangular block is distributed across the multimode cladding area and is imaged as a multimode cladding area scratch in the fiber end-face inspection instrument. The calibration area of ​​the second region calibrator has a single-mode fiber core region, a single-mode cladding region, a multimode fiber core region, and a multimode cladding region. The simulated defect component of the second region calibrator includes at least five circular blocks. One circular block is distributed at the boundary of the single-mode fiber core region and is imaged as a single-mode cross-region spot in the fiber end-face inspection instrument. Another circular block is distributed at the boundary of the multimode fiber core region and is imaged as a multimode cross-region spot in the fiber end-face inspection instrument. A third circular block is distributed in the single-mode fiber core region and is imaged as a single-mode fiber core region spot in the fiber end-face inspection instrument. A fourth circular block is distributed in both the single-mode cladding region and the multimode fiber core region and is imaged as either a single-mode cladding region spot or a multimode fiber core region spot in the fiber end-face inspection instrument. Finally, a fifth circular block is distributed in the multimode cladding region and is imaged as a multimode cladding region spot in the fiber end-face inspection instrument.

2. The fiber optic end-face inspection calibration device as described in claim 1, characterized in that, The first calibrator includes a first measurement calibrator for calibrating the measurement error and measurement repeatability of the spot diameter, and a second measurement calibrator for calibrating the measurement error and measurement repeatability of the scratch line width.

3. The fiber optic end-face inspection calibration device as described in claim 2, characterized in that, The simulated defect component in the first measurement calibrator includes multiple circular blocks, which are imaged as circular spots in the fiber optic end-face inspection instrument, and the diameter of the circular spots is one of 2μm, 3μm, 5μm, and 25μm.

4. The fiber optic end-face inspection calibration device as described in claim 2, characterized in that, The simulated defect component in the second measurement calibrator includes multiple rectangular blocks that are imaged as scratches in the fiber optic end-face inspection instrument, the scratches having a width of 3 μm or 4 μm.

5. The fiber optic end-face inspection calibration device as described in claim 1, characterized in that, The third calibrator is a large field-of-view calibrator, and the simulated defect component in the large field-of-view calibrator includes a circular block and a plurality of triangular blocks, the triangular blocks being distributed circumferentially along the circular block.

6. The fiber optic end-face inspection calibration device as described in any one of claims 1-5, characterized in that, It also includes a standard field-of-view calibrator, which includes a transparent substrate on which a calibration area is etched, the calibration area having a third coating.

7. A method for manufacturing a calibration device for an optical fiber end-face inspection instrument, characterized in that, include: A metallic coating is fabricated on a transparent substrate; On the surface of a substrate with a metal coating, laser lithography is used to etch and form a simulated defect component, which is used to simulate fiber end face defects of an optical fiber connector. The substrate is cut into the target size to obtain a calibrator. Multiple calibrators with different simulated defect components constitute the fiber optic end face inspection calibration device as described in any one of claims 1-6.

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