Shearing amount adaptive regulation method and system for shearing speckle interferometry measurement

Abstract

The present application provides a kind of shear amount self-adapting regulation method and system of shear speckle interferometry, it is related to speckle interferometry field, including the following steps: according to the number in the optical transfer function of shear device and the phase difference jump point on the 1st fringe order in the phase difference distribution diagram of shear device, determine shear interference fringe jump point number threshold range;Realize the automatic quantitative analysis and judgment of the information of dense and sparse stripes in the phase difference distribution diagram of shear interference, and then guide the adaptive adjustment of shear amount in the strain measurement process, solve the problem of reducing the strain measurement accuracy caused by improper selection of shear amount parameter in the existing laser shear speckle interferometry technology, and the whole regulation process does not need human intervention, can realize the automatic, efficient and accurate regulation of shear amount.

Description

Technical Field

[0001] This invention relates to the field of speckle interferometry technology, and specifically to an adaptive control method and system for shear quantity in shear speckle interferometry. Background Technology

[0002] Sheared speckle interferometry is an optical measurement technique based on the laser speckle phenomenon and the principle of interference. It is primarily used to measure the displacement derivatives of an object's surface, such as the first derivative (slope) of out-of-plane displacement. When coherent light (such as laser light) illuminates a rough surface, the scattered light interferes with each other in space due to the surface's microscopic irregularities, forming a random intensity distribution pattern. After the object light field passes through an optical shearing device, the speckle pattern on the object's surface undergoes a certain displacement laterally, i.e., lateral shearing. The original object light field and the sheared object light field interfere on the imaging plane, which is called sheared speckle interferometry.

[0003] During the measurement process, if the shearing amount of the shearing device is not set properly, it will affect the accuracy of the strain measurement results. Currently, the commonly used method for adjusting the shearing amount is as follows: During the measurement process, the shear interference phase difference distribution map obtained at a certain shearing amount is visually qualitatively observed. If there are phenomena such as excessively dense fringes or low signal-to-noise ratio, the shearing amount is reduced to improve the measurement accuracy of the phase change. If there are phenomena such as excessively sparse fringes (only zero-order fringes exist in the entire field of view), the shearing amount is increased to improve the calibration accuracy of the shearing amount. The above process is repeated until the above phenomena are no longer visually judged in the shear interference phase difference distribution map, so as to ensure the accuracy of strain measurement.

[0004] However, the method of controlling the shear amount using visual qualitative observation requires manual intervention. The control results are greatly affected by subjective human factors, making it impossible to accurately and quantitatively analyze the fringe density information in the shear interference phase difference distribution map. Consequently, it cannot effectively guide the reasonable adjustment of the shear amount to improve the accuracy of strain measurement results. Furthermore, the method of controlling the shear amount using visual qualitative observation usually requires multiple manual adjustments to obtain a suitable shear amount. The control process is time-consuming and cumbersome, and cannot achieve automated, efficient, and precise control of the shear amount. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this invention provides an adaptive control method and system for shear quantity in shear speckle interferometry, which solves the technical problem that visual qualitative observation methods are insufficient to guide the reasonable adjustment of shear quantity to improve the accuracy of strain measurement results.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] In a first aspect, the present invention provides an adaptive control method for shear quantity in shear speckle interferometry, comprising the following steps: based on the optical transfer function of the shearing device... The phase difference jump points on the first-order fringe level in the phase difference distribution diagram of the shearing device are used to determine the threshold range of the number of shearing interference fringe jump points.

[0010] in, Number = Focal length f / Pupil diameter D;

[0011] The shear speckle interferogram required for measurement is input into the shearing device. Under the initial shearing amount setting conditions, the shearing interferogram phase difference filter distribution map of the shear speckle interferogram obtained by the shearing device is read. The phase filter map is scanned row by row and column by column at fixed pixel intervals along the vertical and parallel directions respectively to obtain the phase distribution curves corresponding to the scanned rows and columns.

[0012] Calculate the difference between adjacent data points in the phase curve to obtain the occurrence of events in the phase curve. The data points of phase transitions are identified, and the number of transition points for each phase distribution curve is counted.

[0013] Find the phase distribution curve with the most jump points and record it as the maximum number of jump points;

[0014] The maximum number of jump points is compared with the initially set threshold range for the number of jump points in the shear interference fringes. If the maximum number of jump points is lower than the lower limit of the threshold range, the shearing amount is doubled; if the maximum number of jump points is higher than the upper limit of the threshold range, the shearing amount is halved.

[0015] Repeat the above steps until the maximum number of jump points is within the threshold range, then stop the adaptive control of the shear amount to obtain the shear amount within the corresponding threshold range, and use the obtained shear amount as the shear amount of shear speckle interferometry.

[0016] Preferably, the lower limit of the threshold range is the number of maximum values ​​of phase difference jump points when the stripe level in the phase difference distribution map is 1.

[0017] Preferably, the upper limit of the threshold range is set relative to the optical transfer function. The numbers are compatible, and their values ​​are inversely proportional to the optical transfer function. number.

[0018] Preferably, different results are obtained through numerical simulation or experimental verification. The highest stripe level that the shearing device can accurately record is used to determine the maximum number of transition points of the highest stripe level as the upper limit of the threshold.

[0019] Preferably, the shear speckle interferogram is acquired by a detector. In a second aspect, the present invention provides an adaptive control system for shear quantity in shear speckle interferometry, used to execute a shear quantity control method, the shear quantity control system comprising:

[0020] Numerical setting module: used to set the threshold range for the number of shear interference fringe transition points;

[0021] Image acquisition module: used to acquire shear speckle interferograms;

[0022] Difference value calculation module: used to calculate the difference value between adjacent data points in the phase curve and count the number of transition points of each phase distribution curve;

[0023] Comparison module: Used to compare the maximum number of obtained transition points with the initially set threshold range of transition points for shear interference fringes, and determine whether to adjust the current shear amount.

[0024] Thirdly, the present invention provides a computer-readable storage medium storing a computer program for shear quantity control, wherein the computer program causes a computer to perform a shear quantity control method.

[0025] Fourthly, the present invention provides an electronic device, comprising:

[0026] One or more processors, a memory, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the programs including methods for performing shear rate control.

[0027] (III) Beneficial Effects

[0028] This invention provides an adaptive control method and system for shear quantity in shear speckle interferometry. Compared with the prior art, it has the following advantages:

[0029] By setting an adaptive control method for shear quantity in shear speckle interferometry, automatic quantitative analysis and judgment of fringe density information in the shear interference phase difference distribution map can be achieved. This guides the adaptive adjustment of shear quantity during strain measurement, solving the problem of reduced strain measurement accuracy caused by improper selection of shear quantity parameters in existing laser shear speckle interferometry technology. At the same time, the entire control process does not require human intervention, enabling automated, efficient, and precise control of shear quantity. Attached Figure Description

[0030] 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.

[0031] Figure 1 The image shows the filtered distribution of the shear interference phase difference obtained when the shearing amount is 2 mm in Example 1.

[0032] Figure 2 This is a phase distribution curve of each row and column of the phase difference filter graph obtained by scanning when the shearing amount is 2mm in Example 1;

[0033] Figure 3 This is a graph showing the calculation of the number of jump points when the shear amount is 2 mm in Example 1;

[0034] Figure 4 This is a filtered distribution diagram of the shear interference phase difference obtained when the shearing amount is 4 mm in Example 1.

[0035] Figure 5 This is a phase distribution curve of each row, column, and line in the phase difference filter graph obtained by scanning when the shearing amount is 4mm in Example 1.

[0036] Figure 6 This is a calculation chart of the number of jump points when the shear amount is 4 mm in Example 1;

[0037] Figure 7 This is a comparison chart of strain measurement errors when the shear amount is 2mm and 4mm in Example 1;

[0038] Figure 8 This is a filtered distribution diagram of the shear interference phase difference obtained when the shearing amount is 20 mm in Example 2.

[0039] Figure 9 This is a phase distribution curve of each row and column of the phase difference filter graph obtained by scanning with a shearing amount of 20mm in Example 2.

[0040] Figure 10 This is a calculation chart of the number of jump points when the shear amount is 20mm in Example 2;

[0041] Figure 11 This is a filtered distribution diagram of the shear interference phase difference obtained when the shearing amount is 10 mm in Example 2.

[0042] Figure 12 This is a phase distribution curve of each row and column line in the phase difference filter graph obtained by scanning when the shearing amount is 10mm in Example 2.

[0043] Figure 13 This is a calculation chart of the number of jump points when the shear amount is 10mm in Example 2;

[0044] Figure 14 This is a comparison chart of strain measurement errors when the shear amount is 20mm and 10mm in Example 2. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] This application provides a method and system for adaptive control of shear amount in shear speckle interferometry, which solves the problem in the prior art that visual qualitative observation methods are difficult to guide the reasonable adjustment of shear amount to improve the accuracy of strain measurement results, and realizes the accuracy of shear speckle interferometry when measuring the strain of an object.

[0047] The technical solution in this application is to solve the above-mentioned technical problems, and the general idea is as follows:

[0048] In existing technologies, during the measurement process using shear speckle interferometry, it has been found that if the shearing amount of the shearing device is not set properly, it will affect the accuracy of the strain measurement results.

[0049] On the one hand, if the shearing amount is set too large, it will cause the fringe order in the shearing interference phase difference distribution map to be too high and the fringes to be too dense, resulting in them not being effectively acquired by the detector of the shearing device; on the other hand, an excessively large shearing amount will cause the fringe period and speckle scale (determined by the optical transfer function of the shearing device) to be too large. The difference in the number of fringes is relatively close, which increases the speckle noise and reduces the fringe contrast, making it impossible to effectively observe some fringes. All of the above factors will cause the measured phase change to be lower due to the loss of the fringe order in the phase difference distribution map, resulting in inaccurate strain measurement results.

[0050] On the other hand, if the shear amount is set too small, although it can achieve high signal-to-noise ratio effective acquisition of each fringe order in the shear interference phase difference distribution map and ensure accurate measurement of the phase change, it is difficult to effectively calibrate the shear amount (which is comparable to the spatial resolution scale of the detector) due to the limited spatial resolution of the shear device detector. The resulting calibration error of the shear amount measurement result will also affect the accuracy of the strain measurement result.

[0051] In summary, when using shear speckle interferometry for strain measurement, the proper control of the shearing amount of the shearing device is of paramount importance. Excessive or insufficient shearing amounts will increase the measurement errors of the phase change and shearing amount, respectively, thus affecting the accuracy of strain measurement.

[0052] Research has shown that by using the shear quantity control method proposed in this application to control the shear quantity during shear speckle interferometry, automated, efficient, and precise control of the shear quantity can be achieved.

[0053] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0054] This invention provides an adaptive control method for shear quantity in shear speckle interferometry, comprising the following steps:

[0055] S1. Determine the threshold range of the number of shearing interference fringe jump points based on the F / # number in the optical transfer function of the shearing device and the phase difference jump points on the first-order fringe level in the phase difference distribution diagram of the shearing device.

[0056] S2. The shear speckle interferogram required for measurement is input into the shearing device. Under the initial shearing amount setting conditions, the shearing interference phase difference filter distribution map of the shear speckle interferogram obtained by the shearing device is read. The phase filter map is scanned row by row and column by column at fixed pixel intervals along the vertical and parallel directions respectively to obtain the phase distribution curves corresponding to the scanned rows and columns.

[0057] S3. Calculate the difference between adjacent data points in the phase curve to obtain the phase curve. The data points of phase transitions are identified, and the number of transition points for each phase distribution curve is counted.

[0058] S4. Find the phase distribution curve with the most jump points and record it as the maximum number of jump points.

[0059] S5. Compare the maximum number of jump points obtained with the initially set threshold range of the number of jump points in the shear interference fringes. If the maximum number of jump points is lower than the lower limit of the threshold range, the shearing amount is doubled; if the maximum number of jump points is higher than the upper limit of the threshold range, the shearing amount is halved.

[0060] S6. Repeat steps S1 to S5 until the maximum number of jump points is within the threshold range, then stop the adaptive control of the shear amount, obtain the shear amount within the corresponding threshold range, and use the obtained shear amount as the shear amount of shear speckle interferometry.

[0061] By setting an adaptive control method for shear quantity in shear speckle interferometry, automatic quantitative analysis and judgment of fringe density information in the shear interference phase difference distribution map can be achieved. This guides the adaptive adjustment of shear quantity during strain measurement, solving the problem of reduced strain measurement accuracy caused by improper selection of shear quantity parameters in existing laser shear speckle interferometry technology. At the same time, the entire control process does not require human intervention, enabling automated, efficient, and precise control of shear quantity.

[0062] In step S1, Number = Focal length f / Pupil diameter D;

[0063] In step S2, the shear speckle interferogram is acquired by a detector, which can be a CCD or CMOS camera, etc.

[0064] Specifically, the lower limit of the threshold range corresponds to the fringe level 1 in the phase difference distribution diagram, and the lower limit of the threshold range is the number of maximum values ​​of phase difference jump points when the fringe level is 1 in the phase difference distribution diagram; the upper limit of the threshold range is set in relation to the optical transfer function. The value of the number is inversely proportional to the optical transfer function. number.

[0065] It should be noted that the detector has sufficiently high resolution to effectively acquire higher-order fringes in the shear speckle interferometry phase map:

[0066] For example: the number of pixels in the acquired speckle interferometry image is .

[0067] Example 1:

[0068] Adaptive control of shear rate increase: Strain measurement was performed on the observation surface with a deformation of 1 μm, and the initial shear rate of the shear device was 2 mm.

[0069] (1) Selecting the optical transfer function The number of shearing devices is 4, and the threshold range for the number of shearing interference fringe transition points of the shearing devices is set to 4~25.

[0070] The shear speckle interferogram required for measurement is acquired and input into the shearing device for shearing.

[0071] (2) Read the shear interference phase difference filter distribution diagram obtained under the condition of initial shear amount of 2mm, as shown in the figure. Figure 1 As shown;

[0072] (3) At a fixed pixel interval, the phase difference filter map is scanned row by row and column by column along the vertical and parallel directions respectively, to obtain the phase distribution curves corresponding to the lines of each scanned row and column, such as Figure 2As shown;

[0073] (4) Calculate the difference between adjacent data points in the phase curve to obtain the phase curve. The number of data points with phase transitions, such as Figure 3 As shown; the maximum number of jump data points is 0, which is less than the lower limit of the threshold range, indicating that the shear amount is set too small at this time;

[0074] The difference value is the phase difference between two adjacent points on the curve. ;

[0075] (5) Increase the shearing amount of the shearing device by a factor of 2, from the initial 2 mm to 4 mm, and read the shearing interference phase difference filter distribution diagram obtained under this shearing amount setting condition, such as... Figure 4 As shown;

[0076] (6) At a fixed pixel interval, the phase difference filter map is scanned row by row and column by column along the vertical and parallel directions respectively, to obtain the phase distribution curves corresponding to the lines of each scanned row and column, such as Figure 5 As shown;

[0077] (7) Calculate the difference between adjacent data points in the phase curve to obtain the phase curve. The number of data points with phase transitions, such as Figure 6 As shown; the maximum number of jump data points is 4, which reaches the lower limit of the threshold range and is less than the upper limit of the threshold range, indicating that the shear amount setting is appropriate at this time, and the adaptive control process of the shear amount stops.

[0078] (8) Evaluation of the control effect: When the shearing amount of the shearing device is adaptively controlled from 2mm to 4mm, the RMS value and PV value of the strain measurement error decrease significantly;

[0079] RMS and PV values ​​are statistical results of the strain measurement error distribution, as detailed below. Figure 7 As shown;

[0080] pass Figure 7 The results show that the accuracy of strain measurement has been effectively improved.

[0081] Example 2:

[0082] Adaptive control of shear rate reduction: Strain measurement was performed on the observation surface with a deformation of 4 μm, and the initial shear rate of the shear device was 20 mm.

[0083] (1) Selecting the optical transfer function The number of shearing devices is 4, and the threshold range for the number of shearing interference fringe transition points of the shearing devices is set to 4~25.

[0084] The shear speckle interferogram required for measurement is acquired and input into the shearing device for shearing.

[0085] (2) Read the shear interference phase difference filter distribution diagram obtained under the condition of initial shear amount setting of 20mm, such as Figure 8 As shown;

[0086] (3) At a fixed pixel interval, the phase difference filter map is scanned row by row and column by column along the vertical and parallel directions respectively, to obtain the phase distribution curves corresponding to the lines of each scanned row and column, such as Figure 9 As shown;

[0087] (4) Calculate the difference between adjacent data points in the phase curve to obtain the phase curve. The number of data points with phase transitions, such as Figure 10 As shown, the maximum number of jump data points obtained was 33, which is greater than the upper limit of the threshold range, indicating that the shearing amount was set too high at this time.

[0088] The difference value is the phase difference between two adjacent points on the curve. ;

[0089] (5) Reduce the shearing amount of the shearing device by a factor of 20, from the initial 20 mm to 10 mm, and read the shearing interference phase difference filter distribution diagram obtained under this shearing amount setting condition, such as... Figure 11 As shown;

[0090] (6) At a fixed pixel interval, the phase difference filter map is scanned row by row and column by column along the vertical and parallel directions respectively, to obtain the phase distribution curves corresponding to the lines of each scanned row and column, such as Figure 12 As shown;

[0091] (7) Calculate the difference between adjacent data points in the phase curve to obtain the phase curve. The number of data points with phase transitions, such as Figure 13 As shown, the maximum number of jump data points is 22, which is less than the upper limit of the threshold range and greater than the lower limit of the threshold range, indicating that the shear amount setting is appropriate at this time, and the adaptive control process of the shear amount stops.

[0092] (8) Evaluation of the control effect: When the shearing amount of the shearing device is adaptively controlled from 20mm to 10mm, the RMS value and PV value of the strain measurement error decrease significantly;

[0093] RMS and PV values ​​are statistical results of the strain measurement error distribution, as detailed below. Figure 14 As shown;

[0094] pass Figure 14 The results show that the accuracy of strain measurement has been effectively improved.

[0095] It should be noted that the threshold range is determined based on the following (using Examples 1 and 2 as examples):

[0096] The lower threshold is determined based on the following criteria: To avoid only zero-order fringes appearing in the measurement field of view (too sparse fringes), it is necessary to ensure that at least one order of fringes appears in the phase difference distribution map. Specifically, as shown below... Figure 4 As shown, the number of maximum phase difference jump points at this time is 4, specifically as follows: Figure 6 As shown;

[0097] The upper threshold is determined based on the highest fringe order that can be clearly presented in the measurement field of view, mainly considering two aspects:

[0098] 1. In the optical transfer function of the shearing device Number (main aspects): The smaller the number, the higher the optical frequency information that the shearing device can receive during the imaging process, and the higher-order fringes can be formed.

[0099] 2. Number of pixels in the interference image (minor aspect): If the number of pixels is too low, it will result in the inability to effectively acquire higher-order subfringes. This is especially true when the detector resolution is high enough (e.g., ...). The influence of this factor can be ignored.

[0100] Here, when selecting the upper limit of the threshold, only the optical transfer function of the shearing device is considered. Simply count them;

[0101] Specifically, this can be achieved through numerical simulation (see...) Figure 8 and Figure 11 , Figure 8 The central stripes are too dense to be effectively measured or verified experimentally, thus preventing the acquisition of different data. The highest stripe level that the shearing device can accurately record is used to determine the maximum number of transition points as the upper limit of the threshold.

[0102] In summary, compared with existing technologies, it has the following beneficial effects:

[0103] 1. By setting an adaptive control method for the shear amount in shear speckle interferometry, the automatic quantitative analysis and judgment of the fringe density information in the shear interference phase difference distribution map can be realized, thereby guiding the adaptive adjustment of the shear amount in the strain measurement process and solving the problem of reduced strain measurement accuracy caused by improper selection of shear amount parameters in the existing laser shear speckle interferometry technology.

[0104] 2. At the same time, the entire control process requires no human intervention, enabling automated, efficient, and precise control of the shear rate.

[0105] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0106] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for adaptive control of shear quantity in shear speckle interferometry, characterized in that, Includes the following steps: Based on the optical transfer function of the shearing device The phase difference jump points on the first-order fringe level in the phase difference distribution diagram of the shearing device are used to determine the threshold range of the number of shearing interference fringe jump points. in, Number = Focal length f / Pupil diameter D; The shear speckle interferogram required for measurement is input into the shearing device. Under the initial shearing amount setting conditions, the shearing interferogram phase difference filter distribution map of the shear speckle interferogram obtained by the shearing device is read. The phase filter map is scanned row by row and column by column at fixed pixel intervals along the vertical and parallel directions respectively to obtain the phase distribution curves corresponding to the scanned rows and columns. Calculate the difference between adjacent data points in the phase curve to obtain the occurrence of events in the phase curve. The data points of phase transitions are identified, and the number of transition points for each phase distribution curve is counted. Find the phase distribution curve with the most jump points and record it as the maximum number of jump points; The maximum number of jump points is compared with the initially set threshold range for the number of jump points in the shear interference fringes. If the maximum number of jump points is lower than the lower limit of the threshold range, the shearing amount is doubled; if the maximum number of jump points is higher than the upper limit of the threshold range, the shearing amount is halved. Repeat the above steps until the maximum number of jump points is within the threshold range, then stop the adaptive control of the shear amount to obtain the shear amount within the corresponding threshold range, and use the obtained shear amount as the shear amount of shear speckle interferometry.

2. The adaptive control method for shear quantity in shear speckle interferometry as described in claim 1, characterized in that, The lower limit of the threshold range is the number of maximum values ​​of phase difference jump points when the stripe level in the phase difference distribution diagram is 1.

3. The adaptive control method for shear quantity in shear speckle interferometry as described in claim 1, characterized in that, The upper limit of the threshold range is set in relation to the optical transfer function. The numbers are compatible, and their values ​​are inversely proportional to the optical transfer function. number.

4. The adaptive control method for shear quantity in shear speckle interferometry as described in claim 3, characterized in that, Different results were obtained through numerical simulation or experimental verification. The highest fringe level is accurately recorded by the shearing device, and then the maximum number of transition points of the highest fringe level is determined as the upper limit of the threshold.

5. The adaptive control method for shear quantity in shear speckle interferometry as described in claim 1, characterized in that, The shear speckle interferogram was acquired by a detector.

6. A shear quantity adaptive control system for shear speckle interferometry, used to execute the shear quantity control method according to any one of claims 1 to 5, characterized in that, The adaptive shear rate control system includes: Numerical setting module: used to set the threshold range for the number of shear interference fringe transition points; Image acquisition module: used to acquire shear speckle interferograms; Difference value calculation module: used to calculate the difference value between adjacent data points in the phase curve and count the number of transition points of each phase distribution curve; Comparison module: Used to compare the maximum number of obtained transition points with the initially set threshold range of transition points for shear interference fringes, and determine whether to adjust the current shear amount.

7. A computer-readable storage medium, characterized in that, It stores a computer program for adaptive control of shear quantity, wherein the computer program causes the computer to perform the shear quantity control method as described in any one of claims 1 to 5.

8. An electronic device, characterized in that, include: One or more processors, a memory, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the programs including methods for performing the adaptive shearing control method as described in any one of claims 1 to 5.

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