Lens gluing gap monitoring method and device, control terminal and storage medium

Abstract

The present application relates to the field of gap measurement, and discloses a lens bonding gap monitoring method and device, a control terminal and a storage medium, the method comprising: shooting incident light into a lens to be bonded, and receiving interference light reflected by the upper surface and the lower surface of the bonding layer of the lens to be bonded; obtaining the wavelength and the light intensity of the interference light, and calculating the distance of the bonding layer at the incident point of the incident light according to the wavelength and the light intensity. The distance of the incident point is directly obtained by reflecting light, so that the whole measurement process is simple and fast, the measurement instrument has no high requirement, the measurement cost is reduced, and the test requirement of various lenses can be met, and the test difficulty is simplified.

Description

Technical Field

[0001] This invention relates to the field of gap measurement, and more particularly to a method, apparatus, control terminal, and storage medium for monitoring lens bonding gaps. Background Technology

[0002] Lenses are among the most fundamental optical components in optical systems. Today, consumer and industrial lenses demand the highest performance, and image quality, as the most important metric for lens performance, is increasingly critical. However, the gap width between lenses directly affects image quality; even slight assembly errors can lead to a sharp drop in the modulation transfer function of the entire lens assembly. Furthermore, today's imaging systems widely employ aspherical lenses to correct aberrations, improve image quality, and simplify optical structures. However, compared to spherical lenses, aspherical lenses further result in irregular variations in inter-lens distances, necessitating multi-point measurement techniques for precise assembly. Therefore, a high-precision measurement method and device are needed to simultaneously measure the lens gap width at multiple points. Summary of the Invention

[0003] In a first aspect, this application provides a method for monitoring lens bonding gaps, including:

[0004] Incident light is incident on the lens to be bonded, and interference light is received by the reflections from the upper and lower surfaces of the bonding layer of the lens to be bonded.

[0005] The wavelength and intensity of the interference light are obtained, and the spacing of the adhesive layers at the incident point of the incident light is calculated based on the wavelength and intensity.

[0006] Furthermore, the step of directing the incident light into the lens to be bonded further includes:

[0007] By switching the switch, the incident light is directed vertically into different points on the surface of the adhesive layer through different optical fibers.

[0008] Furthermore, the interference light includes a first reflected light and a second reflected light;

[0009] The first reflected light is the light reflected from the incident light on the upper surface, the second reflected light is the light reflected from the lower surface after the incident light passes through the upper surface, and the interference light is formed by the mutual interference of the first reflected light and the second reflected light.

[0010] Furthermore, the calculation of the spacing of the adhesive layers at the incident point of the incident light includes:

[0011] Based on the light intensity and the wavelength, obtain the periodic function satisfied by the light intensity and the wave vector;

[0012] The periodic function is subjected to Fourier transform to obtain a spectrum curve. The spacing of the adhesive layer is determined by the peak value of the transformed spectrum curve.

[0013] Furthermore, the calculation of the spacing of the adhesive layers also includes:

[0014] If there are insufficient data points in the periodic function, data points are added through interpolation before performing the Fourier transform.

[0015] Furthermore, the periodic function expressions for the light intensity and wave vector are as follows:

[0016] I(k)=I1 2 +I2 2 +2(I1 2 *I2 2 ) 1 / 2 cos(k*2h)

[0017] In the formula, I is the light intensity of the interference light, I1 is the light intensity of the first reflected light, I2 is the light intensity of the second reflected light, k is the wave vector, and h is the spacing of the adhesive layers.

[0018] Secondly, this application also provides a lens bonding gap monitoring device, including: a light source, a spectrometer, an optical fiber, and a collimator;

[0019] The collimator is used to receive the light emitted by the light source through the optical fiber and then collimate it before shining it into the lens to be bonded.

[0020] The spectrometer is used to receive interference light reflected from the upper and lower surfaces of the adhesive layer of the lens to be bonded;

[0021] The spectrometer is also used to acquire the wavelength and intensity of the interference light through the optical fiber, and to calculate the spacing of the adhesive layers at the incident point of the incident light based on the wavelength and intensity.

[0022] Furthermore, it also includes: a switching switch and an optical fiber connector, wherein the optical fiber comprises two splitting optical fibers;

[0023] The optical fiber includes multiple optical paths, which are respectively connected to the collimator. The first optical fiber connects the light source and the collimator through the switching switch, and the second optical fiber connects to the spectrometer through the optical fiber connector.

[0024] Both the first and second optical splitting fibers are 1*N Y-type optical splitting fibers, where N is greater than or equal to 2 and less than or equal to 9.

[0025] Secondly, this application also provides a lens bonding gap monitoring device, including: a light source, a spectrometer, two optical fibers, a collimator, a switching switch, and an optical fiber connector;

[0026] The light source is connected to the switching switch via the first optical splitter fiber, and the switching switch is used to control the switching state of the optical splitter path of the first optical splitter fiber.

[0027] The first optical fiber includes multiple optical splitting paths, which are respectively connected to the collimator to direct light to different measurement points.

[0028] The splitting optical path of the second splitting optical fiber and the splitting optical path of the first splitting optical fiber are connected through the collimator to receive reflected light from the measurement point.

[0029] The splitting optical path of the second optical fiber is connected to the optical connector, and the optical connector is connected to the spectrometer. The spectrometer calculates the spacing of the adhesive layer by receiving light from the second optical fiber.

[0030] Furthermore, the two splitting fibers are 1*N Y-type splitting fibers, where N is greater than 2 and less than 9.

[0031] Thirdly, this application also provides a control terminal, including a processor and a memory, wherein the memory stores a computer program, and the computer program executes the lens bonding gap monitoring method described in any one of the claims when it is run on the processor.

[0032] Fourthly, this application also provides a readable storage medium storing a computer program that, when run on a processor, executes the lens bonding gap monitoring method described in any one of the claims.

[0033] This invention discloses a method, apparatus, control terminal, and storage medium for monitoring the bonding gap of lenses. The method includes: shining incident light into a lens to be bonded and receiving interference light formed by reflections from the upper and lower surfaces of the bonding layer of the lens; acquiring the wavelength and intensity of the interference light; and calculating the spacing of the bonding layers at the incident point of the incident light based on the wavelength and intensity. By directly obtaining the spacing at the incident point from the reflected light, the entire measurement process is simple and quick, with low requirements for the measuring instruments, thus reducing measurement costs. Attached Figure Description

[0034] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope of protection of the present invention. In the various drawings, similar components are numbered similarly.

[0035] Figure 1 This paper shows a schematic diagram of a lens bonding gap monitoring device according to an embodiment of the present application;

[0036] Figure 2 A schematic diagram of another lens bonding gap monitoring device according to an embodiment of this application is shown;

[0037] Figure 3 This paper illustrates a schematic flowchart of a lens bonding gap monitoring method according to an embodiment of this application.

[0038] Figure 4 This paper illustrates a schematic diagram of the lens bonding gap monitoring principle according to an embodiment of this application.

[0039] Figure 5 A schematic diagram of the spectral data processing procedure according to an embodiment of this application is shown;

[0040] Figure 6 A schematic diagram of the lens bonding gap monitoring and measurement points is shown according to an embodiment of this application. Detailed Implementation

[0041] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0042] The components of the embodiments of the invention described and illustrated herein can typically be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0043] In the following, the terms “comprising,” “having,” and their cognates, which may be used in various embodiments of the invention, are intended only to indicate a particular feature, number, step, operation, element, component, or combination thereof, and should not be construed as excluding, firstly, the presence of one or more other features, numbers, steps, operations, elements, components, or combinations thereof, or adding the possibility of one or more features, numbers, steps, operations, elements, components, or combinations thereof.

[0044] Furthermore, the terms "first," "second," and "third" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0045] Unless otherwise specified, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which the various embodiments of the invention pertain. Terms (such as those defined in commonly used dictionaries) shall be interpreted as having the same meaning as in their contextual meaning in the relevant technical field and shall not be interpreted as having an idealized or overly formal meaning, unless clearly defined in the various embodiments of the invention.

[0046] The technical solution of this application is applied to the measurement of the bonding gap in lenses. By shining collimated light into the bonding layer and receiving the reflected light, the spacing of the bonding layer is quickly obtained by analyzing the spectrum of the reflected light. In addition, by shining light into different parts of the same lens, the spacing of different parts is obtained to determine whether the lens is uniform, thereby improving the bonding quality of the lens.

[0047] like Figure 1 As shown, this application provides a lens bonding gap monitoring device, including: a light source 10, a spectrometer 20, an optical fiber 30, and a collimator 40.

[0048] The light source 10 is connected to the collimator 40 via the optical fiber 30. The collimator 40 receives the light emitted by the light source 10 via the optical fiber 30 and then collimates it before shining it into the lens 50 to be tested (which is also the lens to be cemented).

[0049] The spectrometer 20 is used to receive interference light reflected from the upper and lower surfaces of the adhesive layer of the lens to be bonded.

[0050] The spectrometer 20 is also used to acquire the wavelength and intensity of the interference light through the optical fiber 30, and to calculate the spacing of the adhesive layers at the incident point of the incident light based on the wavelength and intensity.

[0051] Understandably, the aforementioned monitoring device measures the spacing of the adhesive layer at the incident point by receiving interference light from the adhesive layer. To determine whether the adhesive layer of the lens is uniform, multiple points need to be tested. To test multiple points simultaneously, a beam splitter can be used to split the incident light into multiple beams, which are then collimated through collimator 40 and directed into the lens to be bonded, allowing for the measurement of multiple points.

[0052] like Figure 2 The diagram shown is a schematic diagram of a lens bonding gap monitoring device in the technical solution of this application.

[0053] The lens bonding gap monitoring device includes: a light source 10, a spectrometer 20, a first optical fiber 31, a second optical fiber 32, a collimator 40, a switching switch 60, and an optical fiber connector 70.

[0054] A light source emits white light, which is transmitted through the first beam splitter 31 and collimated into a straight beam by the collimator 40 before entering the lens under test 50. Light from different branch fibers will strike different positions on the lens under test 50 to measure the gap between two lenses at different locations. The reflected light returns to the spectrometer 20 through the second beam splitter 32. A switch 60 is used to switch the on / off state of the branch fibers below the first beam splitter 31, ensuring that only one branch fiber is active at a time. A fiber optic connector 70 integrates the branch fibers of the second branch fiber 80 onto a single fiber, forming an optical path that returns to the spectrometer 20. By switching the switch 60, the gap at different locations on the lens under test 50 can be tested separately, thus achieving the test of the flatness of the lens under test.

[0055] The first splitting fiber 31 and the second splitting fiber 32 described above have the same structure; both are 1*N Y-type splitting fibers, consisting of one main fiber and multiple branch fibers. The number of branch fibers determines the number of measurement points that can be measured in a single test. The specific number of branch fibers can be set according to the specifications of the measuring lens or the measurement standard. In this application, N can be greater than 2 and less than 9.

[0056] The method of this application will now be described with reference to specific embodiments.

[0057] like Figure 2 The lens bonding gap monitoring device shown in the figure determines how many points can be measured in one measurement by the number of optical paths split by the two optical splitting fibers. The measurement method for each point is the same. Therefore, this application uses the measurement of one point to illustrate the technical solution of this application.

[0058] like Figure 3 As shown, the technical solution of this application includes the following steps.

[0059] Step S100: Incident light is incident into the lens to be bonded, and interference light reflected from the upper and lower surfaces of the bonding layer of the lens to be bonded is received.

[0060] The testing method described in this application is used to test the adhesive layer of the lenses to be bonded. This adhesive layer has not yet been filled and bonded, and it is necessary to test whether the gaps between the lenses are uniform before bonding. It can be understood that the upper surface of the adhesive layer is the lower surface of the upper lens, and the lower surface of the adhesive layer is the upper surface of the lower lens.

[0061] First, white light is emitted from the light source 10 and transmitted through the first optical fiber 31. The switching switch 60 controls the switching state of each branch optical fiber through a switching operation. The switching switch 60 can enable all branch optical fibers to transmit light, or it can enable only one branch optical fiber to transmit light.

[0062] When the light passes through the collimator 40, it is collimated into parallel light and enters the lens 50 under test. The incident angle of the light is perpendicular to the lens under test, so that the reflected light can return along the same path through the collimator 40, and then be brought back to the spectrometer 20 by the second optical fiber 32.

[0063] The reflected light includes a first reflected ray and a second reflected ray.

[0064] like Figure 4 The diagram shown is a schematic of the optical path after light enters the lens under test 50. For ease of explanation, the incident light in this diagram does not enter at a 90-degree angle.

[0065] In the diagram, L1 represents the incident light. The lens 50 under test consists of an upper lens 61 and a lower lens 62, with a gap h between them. When L1 enters the upper lens 61, transmission and refraction occur, generating the first reflected light L2. This first reflected light L2 is the light reflected from the upper surface of the incident light L1. Simultaneously, the incident light L1 also passes through the upper lens 61, and the remaining portion is reflected on the lower lens 62, generating the second reflected light L3. It can be seen that L2 and L3 are actually two beams split from the same beam. Except for the optical path difference, their frequencies and wavelengths are the same. This optical path difference is related to the spacing of the adhesive layers h. Therefore, the spacing h can be calculated using these two reflected lights.

[0066] It is understandable that when L1 is incident perpendicularly, the reflected light L2 and L3 are on the same optical path and return to the collimator. L2 and L3 interfere with each other to form reflected light. The spacing h is calculated by analyzing the set of the reflected light.

[0067] The reflected light is collimated by a collimator to become parallel light, then passes through the second optical fiber 32 and is input into the spectrometer 20 via the optical fiber connector 70. It can be understood that the optical fiber connector 70 is used to integrate the various branch optical fibers of the second optical fiber 32 into a single main optical fiber; that is, the light from all the branch optical fibers will be input into the main optical fiber for transmission.

[0068] In actual measurements, to prevent the influence of reflected light from other measurement points, only one point is measured at a time. This is achieved by using the aforementioned switching switch 30 to control the light from a single branch fiber to be directed into the collimator 40, thus directing the light to the measurement point on the lens under test 50. The reflected light is then captured, passed through the second beam splitter 32, and via the fiber optic connector 70, input into the spectrometer 20 to complete the measurement of one point. Then, the switching switch 60 switches other branch fibers to allow light to illuminate different points on the lens under test 50, continuing the measurement of other points until the spacing between all points is obtained.

[0069] Step S200: Obtain the wavelength and intensity of the interference light, and calculate the spacing of the adhesive layers at the incident point of the incident light based on the wavelength and intensity.

[0070] like Figure 5 As shown, after receiving the reflected light, the spectrometer 20 can obtain the wavelength and intensity of the first and second reflected light, thereby obtaining the corresponding spectral data.

[0071] In order to calculate the aforementioned spacing h, a Fourier transform needs to be performed on the obtained spectral data. However, the curve with wavelength on the horizontal axis and light intensity on the vertical axis is not a periodic function. Therefore, a coordinate transformation is required to convert the wavelength into a wave vector, and then the relationship between the wave vector and the light intensity can be calculated.

[0072] That is, we obtain the relation:

[0073] I(k)=I1 2 +I2 2 +2(I1 2 I2 2 ) 1 / 2 cos(k*2h)

[0074] In the formula, I is the intensity of the reflected light, I1 is the intensity of the first reflected light, I2 is the intensity of the second reflected light, k is the wave vector, and h is the spacing of the adhesive layers.

[0075] Where k = 2π / λ, λ is the wavelength, and k is the wave vector, thus obtaining a periodic function related to k. This periodic function reflects the changes in the propagation of the received light. Since the reflected light is formed by the mutual diffraction of the first and second reflected light, a Fourier transform can be performed to determine the gap.

[0076] Theoretically, the waveform of the periodic function obtained after coordinate transformation should be smooth. However, due to systematic errors or other reasons, the reflected light obtained by the spectrometer may contain stray light, that is, there may be noise points on the waveform after transformation. Therefore, the data can be filtered to remove noise points and leave the data points without problems.

[0077] Specific filtering methods can include mean filtering or Kalman filtering.

[0078] If there are too few remaining data points after filtering, interpolation can be used to insert more data points to enrich the data and facilitate subsequent calculations. Specific interpolation algorithms can include adjacent interpolation, bicubic interpolation, and bilinear interpolation, etc.

[0079] Then, perform a Fourier transform on the above relation, and after the discrete Fourier transform, obtain the expression:

[0080]

[0081] In the formula, I^(k) is the Fourier transform of the light intensity, N is the total amount of data, e is the natural logarithm, x is the data number, and i is a complex number.

[0082] N is the upper limit of the amount of spectral data accepted, and x represents the label from the first spectral data to the Nth spectral data.

[0083] After Fourier transform, the abscissa of the I^(k) curve is converted into length, that is, k is converted into wavelength, to obtain the I^(λ) curve. The maximum value of this curve is then calculated, and the abscissa of the maximum value is the distance h of the measurement point. Thus, the distance of a measurement point in a lens is obtained.

[0084] Understandably, after completing the above measurements, the next measurement point will be measured. During the entire measurement process, you only need to switch the switch to measure the lens gap at different points. By combining the lens gaps at multiple points, you can analyze whether the two lenses are uniform. If they are not uniform, you can adjust them according to the gaps at each point. If they are uniform, you can glue them together.

[0085] like Figure 6 As shown, the black dots represent measurement points on the lens. Taking a maximum of 9 measurement points as an example, these points can be arranged in a crisscross pattern on the lens. If there are 8 points, they can be arranged in two columns with 4 points in each column. Similarly, they can also be arranged irregularly to measure the gaps in every part of the lens as much as possible, so as to reflect whether the spacing between the lenses is uniform.

[0086] This invention discloses a method for monitoring the bonding gap of lenses. The method involves incident light onto the upper surface of the bonding layer and receiving reflected light from the bonding layer. The wavelength and intensity of the interference light are obtained, and the spacing of the bonding layers at the incident light point is calculated based on these parameters. By directly obtaining the spacing at the incident point from the reflected light, the entire measurement process is simple and quick, requiring less sophisticated measuring equipment and reducing costs. Furthermore, the specific surface shape of the lens is not required during measurement; any inter-lens distance can be measured. No complex automated equipment is needed; measurement data from multiple points can be obtained through a switch control. The position and number of measurement points can be customized, allowing for simultaneous measurement of multiple points without moving the lens, thus avoiding system errors, shortening testing time, and improving production efficiency.

[0087] This application also provides a control terminal, including a processor and a memory, wherein the memory stores a computer program, and the computer program executes the lens bonding gap monitoring method described in any one of the claims when it is run on the processor.

[0088] This application also provides a readable storage medium storing a computer program that, when run on a processor, executes any of the lens bonding gap monitoring methods described above.

[0089] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can also be implemented in other ways. The apparatus embodiments described above are merely illustrative; for example, the flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods, and computer program products according to various embodiments of the present invention. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that, as an alternative implementation, the functions marked in the blocks may occur in a different order than those marked in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagram and / or flowchart, and combinations of blocks in the block diagram and / or flowchart, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

[0090] In addition, the functional modules or units in the various embodiments of the present invention can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0091] If the aforementioned functions are implemented as software functional modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a smartphone, 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 storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0092] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for monitoring lens bonding gap, characterized in that, include: Incident light is incident on the lens to be bonded, and interference light is received by the reflections from the upper and lower surfaces of the bonding layer of the lens to be bonded. The wavelength and intensity of the interference light are obtained, and the spacing of the adhesive layers at the incident point of the incident light is calculated based on the wavelength and intensity. The interference light includes a first reflected light and a second reflected light; The first reflected light is the light reflected from the incident light on the upper surface, the second reflected light is the light reflected from the lower surface after the incident light has passed through the upper surface, and the interference light is formed by the mutual interference of the first reflected light and the second reflected light; The periodic function expressions for the light intensity and wave vector are as follows: I(k)=I1 2 + I2 2 +2(I1 2 *I2 2 ) 1 / 2 cos(k*2h) In the formula, I is the light intensity of the interference light, I1 is the light intensity of the first reflected light, I2 is the light intensity of the second reflected light, k is the wave vector, and h is the spacing of the adhesive layers.

2. The method for monitoring lens bonding gap according to claim 1, characterized in that, The process of directing incident light into the lens to be bonded includes: By switching the switch, the incident light is directed vertically into different points on the surface of the adhesive layer through different optical fibers.

3. The method for monitoring lens bonding gap according to claim 1, characterized in that, The calculation of the spacing of the adhesive layers at the incident point of the incident light includes: Based on the light intensity and the wavelength, obtain the periodic function satisfied by the light intensity and the wave vector; The periodic function is subjected to Fourier transform to obtain a spectrum curve. The spacing of the adhesive layer is determined by the peak value of the transformed spectrum curve.

4. The method for monitoring lens bonding gap according to claim 3, characterized in that, The calculation of the spacing of the adhesive layers also includes: If there are insufficient data points in the periodic function, data points are added through interpolation before performing the Fourier transform.

5. A lens bonding gap monitoring device, characterized in that, include: Light source, spectrometer, optical fiber and collimator; The collimator is used to receive the light emitted by the light source through the optical fiber and then collimate it before shining it into the lens to be bonded. The spectrometer is used to receive interference light reflected from the upper and lower surfaces of the adhesive layer of the lens to be bonded; The spectrometer is also used to obtain the wavelength and intensity of the interference light through the optical fiber, and to calculate the spacing of the adhesive layers at the incident point of the incident light based on the wavelength and intensity. The interference light includes a first reflected light and a second reflected light; The first reflected light is the light reflected from the incident light on the upper surface, the second reflected light is the light reflected from the lower surface after the incident light has passed through the upper surface, and the interference light is formed by the mutual interference of the first reflected light and the second reflected light; The periodic function expressions for the light intensity and wave vector are as follows: I(k)=I1 2 + I2 2 +2(I1 2 *I2 2 ) 1 / 2 cos(k*2h) In the formula, I is the light intensity of the interference light, I1 is the light intensity of the first reflected light, I2 is the light intensity of the second reflected light, k is the wave vector, and h is the spacing of the adhesive layers.

6. The lens bonding gap monitoring device according to claim 5, characterized in that, Also includes: A switching switch and an optical fiber connector, wherein the optical fiber comprises two splitting fibers; The optical fiber includes multiple optical paths, which are respectively connected to the collimator. The first optical fiber connects the light source and the collimator through the switching switch, and the second optical fiber connects to the spectrometer through the optical fiber connector. Both the first and second optical splitting fibers are 1*N Y-type optical splitting fibers, where N is greater than or equal to 2 and less than or equal to 9.

7. A control terminal, characterized in that, It includes a processor and a memory, the memory storing a computer program that, when run on the processor, executes the lens bonding gap monitoring method according to any one of claims 1 to 4.

8. A readable storage medium, characterized in that, It stores a computer program that, when run on a processor, executes the lens bonding gap monitoring method according to any one of claims 1 to 4.

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