Contact lens power indirect detection method and detection system

Abstract

The invention relates to the technical field of contact lens detection, and particularly discloses a contact lens focal power indirect detection method and system, and the method comprises the steps: obtaining mother shell film data, and monitoring feeding and discharging equipment data and measurement environment data; processing mother shell film data to obtain a mother shell film optical performance evaluation index, processing loading and unloading equipment data to obtain a loading and unloading stability evaluation index, and performing comprehensive analysis to obtain a focal power detection reliability evaluation value; performing early warning feedback according to the power detection reliability evaluation value; and acquiring optical imaging data of the contact lens, and judging whether the focal power of the contact lens is qualified. According to the contact lens power indirect detection method and detection system provided by the invention, the accuracy and reliability of the measurement result can be ensured, the lens quality problem can be reduced, the matching between the lens of the glasses and the eye power of a consumer can be ensured, the problems in the production process can be found in time, and the production efficiency is improved. And the quality and the stability of the product are further ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of contact lens detection, and specifically to an indirect detection method and detection system for the diopter of contact lenses. Background Art

[0002] The diopter is one of the key performance indicators of contact lenses, which is directly related to the vision correction effect and wearing comfort of the wearer. Traditional direct measurement methods face challenges such as limited accuracy and complex operation. Currently, indirect detection methods for diopters have been promoted. For example, by exploring other parameters or phenomena related to the lens diopter, using principles such as a Moore deflectometer, Hartmann method, or phase-shifting schlieren method, indirect, efficient, and accurate measurement of the diopter of contact lenses can be achieved.

[0003] For example, the invention patent with the publication number CN117825010B is a method and detection system for detecting the diopter of a contact lens dry sheet: including a reference object illumination unit, a reference object, a contact lens dry sheet, and an industrial imaging unit that are sequentially placed at intervals along the same axis from bottom to top; electrically connecting the industrial imaging unit to an image processing unit; electrically connecting the image processing unit to a diopter calculation unit; turning on the reference object illumination unit, and the image processing unit obtains the imaging of the reference object collected by the industrial imaging unit; the image processing unit extracts the characteristic parameters of the imaging and sends the characteristic parameters of the imaging to the diopter calculation unit; the diopter calculation unit calculates and obtains the diopter of the contact lens dry sheet according to the mathematical relationship between the diopter and the imaging characteristic parameters.

[0004] For example, the invention patent with the publication number CN118275443A is a method and system for detecting contact lens defects. The contact lens defect detection method includes: setting a contact lens defect detection system according to the characteristics of the contact lens to be detected; wherein, the characteristics of the contact lens to be detected include: type, diopter, defect position, and detection distance. The contact lens defect detection system includes: a plurality of illumination light sources and one or more beam splitters; combining the plurality of illumination light sources through one or more beam splitters to form a combined beam; irradiating the combined beam onto the surface of the contact lens to be detected and collecting the lens image of the contact lens to be detected; performing enhancement processing on the lens image according to a preset image enhancement algorithm; performing image analysis on the enhanced lens image to determine the defects of the contact lens to be detected.

[0005] However, in the process of implementing the technical solution of the present invention in the embodiments of the present application, it is found that the above technologies have at least the following technical problems: Currently, indirect detection methods for the diopter of contact lenses pay more attention to measurement accuracy and the degree of automation of operation. However, during the detection process, due to the thin, light, and brittle nature of the lens itself, it is easy to cause improper sample placement or sample damage, and the detection steps are very complex, making it difficult to ensure the accuracy and efficiency of detection. Summary of the Invention

[0006] In view of the deficiencies of the prior art, the present invention provides an indirect detection method and detection system for the diopter of contact lenses, which can effectively solve the problems involved in the above-mentioned background art.

[0007] To achieve the above objectives, the present invention is realized through the following technical solutions: In the first aspect of the present invention, an indirect detection method for the diopter of contact lenses is provided, including: obtaining the data of the mother shell film to be detected, and monitoring the data of the loading and unloading equipment and the measurement environment data.

[0008] Processing the mother shell film data to obtain an optical performance evaluation index of the mother shell film, processing the loading and unloading equipment data to obtain a loading and unloading stability evaluation index, and comprehensively analyzing the loading and unloading stability evaluation index, the measurement environment data, and the optical performance evaluation index of the mother shell film to obtain a diopter detection reliability evaluation value.

[0009] Performing early warning feedback according to the diopter detection reliability evaluation value.

[0010] Obtaining the optical imaging data of the contact lens, and judging whether the diopter of the contact lens is qualified according to the diopter detection reliability evaluation value and the optical imaging data of the contact lens.

[0011] As a further method, the process of processing the mother shell film data to obtain an optical performance evaluation index of the mother shell film is as follows: The mother shell film data includes glossiness, transparency, reflectivity, and transmittance.

[0012] Extracting the critical glossiness, critical transparency, critical reflectivity, and critical transmittance from the contact lens database, comprehensively analyzing to obtain an optical performance evaluation index of the mother shell film, and judging whether to replace the mother shell film according to the optical performance evaluation index of the mother shell film.

[0013] As a further method, the process of judging whether to replace the mother shell film according to the optical performance evaluation index of the mother shell film is as follows: Extracting the optical performance evaluation threshold of the mother shell film from the contact lens database, comparing the optical performance evaluation index of the mother shell film with the optical performance evaluation threshold of the mother shell film. If the optical performance evaluation index of the mother shell film is greater than or equal to the optical performance evaluation threshold of the mother shell film, no additional operation is performed. If the optical performance evaluation index of the mother shell film is less than the optical performance evaluation threshold of the mother shell film, a replacement operation is performed on the mother shell film.

[0014] As a further method, the process of processing the loading and unloading equipment data to obtain a loading and unloading stability evaluation index is as follows: The loading and unloading equipment data includes the positioning deviation, clamping force, conveying speed, and vibration frequency of each loading and unloading.

[0015] Extract the critical positioning deviation, reference standard clamping force, allowable deviation clamping force, reference standard conveying speed, allowable deviation conveying speed, reference standard vibration frequency, and allowable deviation vibration frequency from the contact lens database, and comprehensively analyze to obtain the loading and unloading stability evaluation index.

[0016] As a further method, based on the loading and unloading stability evaluation index, measurement environment data, and mother shell film optical performance evaluation index, comprehensively analyze to obtain the diopter detection reliability evaluation value. The specific analysis process is as follows: The measurement environment data includes the light intensity and dustiness at each time node.

[0017] Extract the reference standard light intensity, allowable deviation light intensity, and critical dustiness from the contact lens database, combine with the loading and unloading stability evaluation index and the mother shell film optical performance evaluation index, and comprehensively analyze to obtain the diopter detection reliability evaluation value. The diopter detection reliability evaluation value is used to quantify the reliability degree of the diopter detection process.

[0018] As a further method, perform early warning feedback based on the diopter detection reliability evaluation value. The specific process is as follows: Extract the diopter detection reliability evaluation threshold from the contact lens database, compare the diopter detection reliability evaluation value with the diopter detection reliability evaluation threshold. If the diopter detection reliability evaluation value is greater than or equal to the diopter detection reliability evaluation threshold, evaluate the diopter detection as qualified and extract the contact lens optical imaging data. If the diopter detection reliability evaluation value is less than the diopter detection reliability evaluation threshold, evaluate the diopter detection as unqualified and perform feedback correction.

[0019] As a further method, judge whether the contact lens diopter is qualified based on the diopter detection reliability evaluation value and the contact lens optical imaging data. The specific analysis process is as follows: The contact lens optical imaging data includes the spot size, spot position offset, and spot eccentricity.

[0020] Extract the reference standard spot size, allowable deviation spot size, critical spot position offset, and critical spot eccentricity from the contact lens database, combine with the diopter detection reliability evaluation value, and comprehensively analyze to obtain the lens diopter accuracy evaluation value. Judge whether the contact lens diopter is qualified according to the lens diopter accuracy evaluation value.

[0021] As a further method, judge whether the contact lens diopter is qualified according to the lens diopter accuracy evaluation value. The specific analysis process is as follows: Extract the lens diopter accuracy evaluation threshold from the contact lens database, compare the lens diopter accuracy evaluation value with the lens diopter accuracy evaluation threshold. If the lens diopter accuracy evaluation value is greater than or equal to the lens diopter accuracy evaluation threshold, evaluate the lens as a qualified finished product and perform finished product processing. If the lens diopter accuracy evaluation value is less than the lens diopter accuracy evaluation threshold, evaluate the lens as an unqualified finished product and give an alarm.

[0022] As a further method, the reliability evaluation value of the diopter detection is a quantitative index obtained by analyzing the feeding and unloading stability evaluation index, the optical performance evaluation index of the mother shell film, the light intensity and the dustiness at each time node, and is used to quantify the reliability of the diopter detection.

[0023] The second aspect of the present invention provides an indirect diopter detection system for contact lenses, including: a data acquisition module, configured to acquire data of the mother shell film to be detected, and monitor the data of the feeding and unloading equipment and the measurement environment data.

[0024] A diopter detection reliability analysis module, configured to process the data of the mother shell film to obtain an optical performance evaluation index of the mother shell film, process the data of the feeding and unloading equipment to obtain a feeding and unloading stability evaluation index, and comprehensively analyze according to the feeding and unloading stability evaluation index, the measurement environment data and the optical performance evaluation index of the mother shell film to obtain a diopter detection reliability evaluation value.

[0025] A diopter detection feedback module, configured to perform early warning feedback according to the diopter detection reliability evaluation value.

[0026] A contact lens diopter qualification evaluation module, configured to acquire contact lens optical imaging data, and judge whether the diopter of the contact lens is qualified according to the diopter detection reliability evaluation value and the contact lens optical imaging data.

[0027] Compared with the prior art, the embodiments of the present invention at least have the following advantages or beneficial effects: (1) By providing an indirect diopter detection method and detection system for contact lenses, the present invention can ensure the accuracy and reliability of the measurement results, reduce lens quality problems, and also ensure that the spectacle lenses match the eye degrees of consumers, thereby improving the wearing comfort and clarity, helping to timely discover problems in the production process, and further ensuring the quality and stability of the products.

[0028] (2) By evaluating the feeding and unloading stability evaluation index, the present invention can effectively reduce the downtime caused by equipment failures, thereby improving production efficiency, and can also reduce product damage caused by improper operation or equipment failures, thereby ensuring product quality, helping to ensure that each batch of contact lenses is treated the same during the processing, and thus improving the consistency and reliability of the products.

[0029] (3) By evaluating the accuracy evaluation value of the lens diopter, the present invention can timely discover errors in the manufacturing process, thereby improving the manufacturing precision of the lenses, helping to adjust and optimize the production process to reduce the generation of errors, improve the qualification rate of products, and can also ensure that consumers obtain suitable glasses, thereby reducing the risk of vision damage and further enhancing the market competitiveness of the products. Brief Description of the Drawings

[0030] The present invention will be further described with reference to the accompanying drawings. However, the embodiments in the drawings do not constitute any limitation to the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the following drawings.

[0031] Figure 1 It is a schematic flow chart of the method of the present invention.

[0032] Figure 2 It is a schematic diagram of the connection of system modules of the present invention.

[0033] Figure 3 It is a schematic diagram of the functional relationship between the reliability evaluation value of the diopter detection of the present invention and the optical performance evaluation index of the mother shell film. Detailed Embodiments

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0035] Referring to Figure 1 As shown, a method for indirectly detecting the diopter of a contact lens is provided in the first aspect of the present invention, including: obtaining the data of the mother shell film to be detected, and monitoring the data of the loading and unloading equipment and the measurement environment data.

[0036] Processing the data of the mother shell film to obtain the optical performance evaluation index of the mother shell film, processing the data of the loading and unloading equipment to obtain the loading and unloading stability evaluation index, and comprehensively analyzing the loading and unloading stability evaluation index, the measurement environment data and the optical performance evaluation index of the mother shell film to obtain the reliability evaluation value of the diopter detection.

[0037] Performing warning feedback according to the reliability evaluation value of the diopter detection.

[0038] Obtaining the optical imaging data of the contact lens, and judging whether the diopter of the contact lens is qualified according to the reliability evaluation value of the diopter detection and the optical imaging data of the contact lens.

[0039] Specifically, processing the data of the mother shell film to obtain the optical performance evaluation index of the mother shell film, and the specific analysis process is as follows: the data of the mother shell film includes glossiness, transparency, reflectivity and transmittance.

[0040] Extract the critical gloss, critical transparency, critical reflectivity, and critical transmittance from the contact lens database, comprehensively analyze to obtain the evaluation index of the optical properties of the mother shell film, and determine whether to replace the mother shell film according to the evaluation index of the optical properties of the mother shell film.

[0041] In a specific embodiment, gloss is an index to measure the flatness and brightness of a surface, which is determined by the ability to reflect light. When the surface is smooth and flat, the specular reflection ability of light is strong and the gloss is high; when the surface appears rough microscopically, the specular reflection ability of light is weak and the gloss is low, which can be measured by a gloss meter; transparency refers to the degree of light transmission through an object. High transparency means that light can pass through the lens better, reducing light loss, and can be measured using a transmittance tester; reflectivity describes the proportion of light reflected on the surface of an object and can be measured by a reflectivity tester; transmittance is the ratio of the light flux after passing through the lens to the incident light flux and can be measured by an ultraviolet-visible spectrophotometer.

[0042] Furthermore, the evaluation index of the optical properties of the mother shell film has a specific numerical expression as follows:

[0043] where, represents the evaluation index of the optical properties of the mother shell film, represents gloss, represents the critical gloss, represents transparency, represents the critical transparency, represents reflectivity, represents the critical reflectivity, represents transmittance, represents the critical transmittance, represents the influencing factor of the evaluation of the optical properties of the mother shell film corresponding to the set gloss, represents the influencing factor of the evaluation of the optical properties of the mother shell film corresponding to the set transparency, represents the influencing factor of the evaluation of the optical properties of the mother shell film corresponding to the set reflectivity, represents the influencing factor of the evaluation of the optical properties of the mother shell film corresponding to the set transmittance.

[0044] The algorithm of this embodiment combines gloss, transparency, reflectivity, and transmittance, and comprehensively analyzes to obtain the optical performance evaluation index of the mother shell film. The surface of the lens with higher gloss is smoother, which can reduce the scattering of light, thereby improving the utilization rate and transparency of light. Therefore, gloss and transparency are positively correlated to a certain extent; transparency and reflectivity restrict each other to a certain extent. The lens with higher transparency allows more light to pass through, but at the same time may reduce the reflection of the lens. However, if there are unevenness or contamination on the lens surface, it may cause an increase in light scattering and reflection, thereby reducing transparency; transmittance and reflectivity are directly related. According to the law of conservation of energy, the reflection and transmission of light on the lens surface are complementary, that is, the more reflected light, the less transmitted light. Therefore, the lens with higher transmittance usually has lower reflectivity. Through comprehensive analysis, a more comprehensive optical performance evaluation index of the mother shell film can be obtained.

[0045] It should be noted that in this embodiment, four key factors, namely gloss, transparency, reflectivity, and transmittance, are considered, which can more comprehensively and accurately evaluate the optical performance of the mother shell film of contact lenses, ensure that the lenses reach the best state in terms of clarity and comfort, help improve the overall quality and consistency of the lenses, reduce the defective rate, and through continuous monitoring and improvement of the production process, the optical performance and comfort of the lenses can be further improved. At the same time, reducing the reflectivity can reduce glare and interfering light, improve visual clarity, and increasing the transmittance can allow more light to enter the eyes, forming a clearer visual image, further enhancing the wearer's visual experience and comfort. By standardizing gloss, transparency, reflectivity, and transmittance, it is ensured that they are compared on the same scale, improving the fairness and comparability of the evaluation. By weighting the effects of gloss, transparency, reflectivity, and transmittance, their relative importance in the evaluation index is reflected, and the weights of different factors can be adjusted according to different needs, making the formula highly adaptable. It is not difficult to see that when the gloss is larger, or the transparency is larger, or the reflectivity deviation is smaller, or the transmittance is larger, the optical performance evaluation index of the mother shell film is larger. By evaluating the optical performance evaluation index of the mother shell film, the visual comfort of the wearer can be significantly improved, and the lens surface with high gloss and appropriate hardness is smoother and not easily scratched or worn, thereby extending the service life of the lens. It can ensure that the produced lenses are consistent in optical performance, and can also provide guidance for the optimization of lens production, help discover problems in the production process and make improvements, and can also adjust the lens design and production process according to market demand and wearer feedback to meet the needs of different wearers.

[0046] In a specific embodiment, the value ranges of the influencing factors for evaluating the optical properties of the mother shell film corresponding to gloss, transparency, reflectivity, and transmittance are between 0 and 1, representing the numerical values of the influence degrees of gloss, transparency, reflectivity, and transmittance on the evaluation index of the optical properties of the mother shell film. Each influencing factor for evaluating the optical properties of the mother shell film can be obtained from the contact lens database. By adjusting the values of the influencing factors, the influence degrees of different factors on the final evaluation index of the optical properties of the mother shell film can be flexibly adjusted. The corresponding relationship can be a pre-set mapping relationship. For example, gloss, transparency, reflectivity, and transmittance form a mapping set with the weight factors corresponding to the pre-set gloss, transparency, reflectivity, and transmittance in the contact lens database. The real-time gloss, transparency, reflectivity, and transmittance are brought into the mapping set to obtain the weight factors corresponding to gloss, transparency, reflectivity, and transmittance. The mapping relationship therein can be a one-to-one or many-to-one relationship.

[0047] Further, it is judged whether to replace the mother shell film according to the evaluation index of the optical properties of the mother shell film. The specific analysis process is as follows: The evaluation threshold of the optical properties of the mother shell film is extracted from the contact lens database, and the evaluation index of the optical properties of the mother shell film is compared with the evaluation threshold of the optical properties of the mother shell film. If the evaluation index of the optical properties of the mother shell film is greater than or equal to the evaluation threshold of the optical properties of the mother shell film, no additional operation is performed. If the evaluation index of the optical properties of the mother shell film is less than the evaluation threshold of the optical properties of the mother shell film, a replacement operation is performed on the mother shell film.

[0048] Specifically, the data of the loading and unloading equipment is processed to obtain the evaluation index of the loading and unloading stability. The specific analysis process is as follows: The data of the loading and unloading equipment includes the positioning deviation, clamping force, conveying speed, and vibration frequency of each loading and unloading.

[0049] The critical positioning deviation, reference standard clamping force, allowable deviation clamping force, reference standard conveying speed, allowable deviation conveying speed, reference standard vibration frequency, and allowable deviation vibration frequency are extracted from the contact lens database, and the evaluation index of the loading and unloading stability is obtained through comprehensive analysis.

[0050] In a specific embodiment, the positioning deviation refers to the difference between the actual position and the expected position when the equipment moves the contact lens from one place to another, which can be measured by a laser rangefinder; the clamping force refers to the force exerted by the contact lens loading and unloading equipment when clamping the contact lens, which can be monitored by a force sensor; the conveying speed refers to the speed required for the contact lens loading and unloading equipment to convey the contact lens from the starting point to the end point, which can be obtained by a speedometer; the vibration frequency refers to the vibration frequency generated by the contact lens loading and unloading equipment during operation, which can be measured by a vibration sensor.

[0051] Further, the evaluation index of the loading and unloading stability, the specific numerical expression is:

[0052] Among them, represents the loading and unloading stability evaluation index, e represents the natural constant, represents the positioning deviation of the j-th loading and unloading, represents the critical positioning deviation, represents the clamping force of the j-th loading and unloading, represents the reference standard clamping force, represents the allowable deviation clamping force, represents the conveying speed of the j-th loading and unloading, represents the reference standard conveying speed, represents the allowable deviation conveying speed, represents the vibration frequency of the j-th loading and unloading, represents the reference standard vibration frequency, represents the allowable deviation vibration frequency, represents the influence factor of the loading and unloading stability evaluation corresponding to the set positioning deviation, represents the influence factor of the loading and unloading stability evaluation corresponding to the set clamping force, represents the influence factor of the loading and unloading stability evaluation corresponding to the set conveying speed, represents the influence factor of the loading and unloading stability evaluation corresponding to the set vibration frequency, j represents the numbering of the loading and unloading times, j = 1, 2, 3,..., n, and n represents the total number of loading and unloading times.

[0053] The algorithm of this embodiment combines the positioning deviation, clamping force, conveying speed and vibration frequency of each loading and unloading, and comprehensively analyzes to obtain the loading and unloading stability evaluation index. The larger the positioning deviation may cause the clamping mechanism to fail to accurately align with the contact lens, thus affecting the stability of the clamping force; the positioning deviation will affect the conveying accuracy, that is, the accuracy of the contact lens being conveyed to the designated position. If the positioning deviation is larger, the conveying accuracy will be reduced, and the contact lens may not be accurately conveyed to the target position; the magnitude of the clamping force directly affects the conveying speed stability. If the clamping force is smaller, the contact lens may slip during the conveying process, and if the clamping force is larger, it may cause damage to the contact lens; the higher the vibration frequency may cause the equipment to generate greater vibration during operation, thus affecting the positioning accuracy. The vibration will cause the position of the clamping mechanism to shift, resulting in an increase in the positioning deviation. Through comprehensive analysis, a more comprehensive loading and unloading stability evaluation index can be obtained.

[0054] It should be noted that in this embodiment, four key factors are considered, namely the positioning deviation, clamping force, conveying speed, and vibration frequency during each loading and unloading process. This allows for a more comprehensive debugging and optimization of the equipment, ensuring that the equipment operates in the best condition. Moreover, reasonable performance parameter settings can reduce equipment wear and failure rates, thereby extending the service life of the equipment. It can also ensure that contact lenses are quickly and accurately placed at the predetermined position, reducing the time for repeated adjustments and error corrections, helping to maintain the smoothness of the production line, reducing downtime caused by equipment failures or improper operations, and further reducing positioning deviations and clamping instability caused by vibrations, thus further guaranteeing product quality. By standardizing the positioning deviation, clamping force, conveying speed, and vibration frequency during each loading and unloading process, ensuring that they are compared on the same order of magnitude, the fairness and comparability of the evaluation are improved. At the same time , , and settings can avoid abnormal loading and unloading equipment and product quality problems caused by excessive positioning deviation, unreasonable clamping force, inappropriate conveying speed, and unreasonable vibration frequency. By weighting the influences of the positioning deviation, clamping force, conveying speed, and vibration frequency during each loading and unloading process, their relative importance in the evaluation index is reflected. Different factor weights can be adjusted according to different requirements, making the formula highly adaptable. It is not difficult to see that the smaller the positioning deviation, clamping force deviation, conveying speed deviation, or vibration frequency, the larger the loading and unloading stability evaluation index. By evaluating the loading and unloading stability evaluation index, it is possible to reflect potential faults or abnormalities that may occur during equipment operation. And through timely maintenance and adjustment, downtime caused by equipment failures can be effectively reduced, thereby improving production efficiency. It is possible to optimize the production process targeted, such as adjusting the loading and unloading speed, improving the clamping method, etc., to further improve production efficiency. It can also reduce product damage caused by improper operations or equipment failures, thus guaranteeing product quality, helping to ensure that each batch of contact lenses undergoes the same treatment during the processing, thereby improving product consistency and reliability.

[0055] In a specific embodiment, the value ranges of the influencing factors for evaluating the feeding and discharging stability corresponding to the positioning deviation, clamping force, conveying speed, and vibration frequency are between 0 and 1, which represent the numerical values of the influence degrees of the positioning deviation, clamping force, conveying speed, and vibration frequency on the feeding and discharging stability evaluation index. Each influencing factor for evaluating the feeding and discharging stability can be obtained from the contact lens database. By adjusting the values of the influencing factors, the influence degrees of different factors on the final feeding and discharging stability evaluation index can be flexibly adjusted. The corresponding relationship can be a pre-set mapping relationship. For example, the positioning deviation, clamping force, conveying speed, and vibration frequency form a mapping set with the weight factors corresponding to the preset positioning deviation, clamping force, conveying speed, and vibration frequency in the contact lens database. Substituting the real-time positioning deviation, clamping force, conveying speed, and vibration frequency into the mapping set, the weight factors corresponding to the positioning deviation, clamping force, conveying speed, and vibration frequency can be obtained. The mapping relationship therein can be a one-to-one or many-to-one relationship.

[0056] Specifically, according to the feeding and discharging stability evaluation index, the measurement environment data, and the mother shell film optical performance evaluation index, the reliability evaluation value of the diopter detection is comprehensively analyzed. The specific analysis process is as follows: The measurement environment data includes the light intensity and dustiness at each time node.

[0057] Extract the reference standard light intensity, allowable deviation light intensity, and critical dustiness from the contact lens database, and comprehensively analyze the reliability evaluation value of the diopter detection in combination with the feeding and discharging stability evaluation index and the mother shell film optical performance evaluation index. The reliability evaluation value of the diopter detection is used to quantify the reliable degree of the diopter detection process.

[0058] In a specific embodiment, the light intensity refers to the luminous flux of visible light received per unit area, abbreviated as illuminance, and the unit is usually expressed in lux. During the contact lens diopter detection process, the light intensity needs to be maintained within a stable and appropriate range. The dustiness refers to the concentration of particulate matter in the air, usually expressed by the number of particulate matter per cubic meter of air. Controlling the light intensity and dustiness helps to reduce pollution and damage during the production process, protect the surface and internal structure of the contact lens, and thus improve the overall quality of the product. The light intensity can be monitored by a light intensity meter, and the dustiness can be monitored by a dustiness detector.

[0059] Furthermore, the reliability evaluation value of the diopter detection, the specific numerical expression is: ;

[0060] Wherein, represents the reliability evaluation value of the diopter detection, represents the mother shell film optical performance evaluation index, represents the feeding and discharging stability evaluation index, represents the light intensity at the \(i\)-th time node, represents the reference standard light intensity, represents the allowable deviation light intensity, represents the dustiness at the \(i\)-th time node, represents the critical dustiness, represents the influence factor for evaluating the reliability of diopter detection corresponding to the set evaluation index of the optical performance of the mother shell film, represents the influence factor for evaluating the reliability of diopter detection corresponding to the set evaluation index of the feeding and unloading stability, represents the influence factor for evaluating the reliability of diopter detection corresponding to the set light intensity, represents the influence factor for evaluating the reliability of diopter detection corresponding to the set dustiness. \(i\) represents the number of each time node, \(i = 1, 2, 3, \cdots, m\), and \(m\) represents the total number of time nodes.

[0061] As Figure 3 shown, in a specific embodiment, = = 0.4, = = 0.3, \(i = m = 1\), = 48 lux, = 50 lux, = 5 lux, = 3 particles / m³, = 10 particles / m³. When = 0.1, the functional relationship between the evaluation value of the reliability of diopter detection and the evaluation index of the optical performance of the mother shell film is as shown by curve \(a\); when = 0.5, the functional relationship between the evaluation value of the reliability of diopter detection and the evaluation index of the optical performance of the mother shell film is as shown by curve \(b\); when = 1, the functional relationship between the evaluation value of the reliability of diopter detection and the evaluation index of the optical performance of the mother shell film is as shown by curve \(c\).

[0062] In this embodiment, the algorithm combines the feeding and unloading stability evaluation index, the optical performance evaluation index of the mother shell film, the light intensity, and the dustiness, and comprehensively analyzes to obtain the reliability evaluation value of the diopter detection. The feeding and unloading stability directly affects the position accuracy and dynamic stability of the contact lens during the processing. If the feeding and unloading is unstable, it may cause the contact lens to shift or be damaged during the processing, thereby affecting its optical performance. The change of light intensity may affect the sensitivity and accuracy of the sensor, thus affecting the feeding and unloading stability. In an environment with a higher dustiness, dust particles may adhere to the contact lens or the feeding and unloading equipment, resulting in equipment failure or product contamination, and further affecting the feeding and unloading stability. The light intensity is one of the important factors affecting the test results of the optical performance of the mother shell film. During the test, it is necessary to ensure that the light intensity is within an appropriate range to avoid interfering with the test results. The adhesion of dust particles will directly affect the light transmittance and clarity of the mother shell film. Therefore, before performing the optical performance test, it is necessary to ensure the cleanliness of the test environment. Through comprehensive analysis, a more comprehensive reliability evaluation value of the diopter detection can be obtained.

[0063] It should be noted that in this embodiment, four key factors are considered, namely the feeding and unloading stability evaluation index, the optical performance evaluation index of the mother shell film, the light intensity, and the dustiness. It is possible to make refined adjustments to the production process, reduce production interruptions caused by equipment failures, material problems, or environmental factors, thereby improving production efficiency, helping to reduce the damage and scrap rate of contact lenses during production, ensuring the stable optical performance of the final product and meeting the standards, reducing the foreign body sensation and discomfort during wearing, enhancing the wearing experience of users, improving the utilization rate of raw materials, reducing waste, further ensuring that the contact lens provides a clear visual effect, and meeting the user's demand for a high-quality visual experience. By standardizing the feeding and unloading stability evaluation index, the optical performance evaluation index of the mother shell film, the light intensity, and the dustiness, it is ensured that they are compared on the same scale, improving the fairness and comparability of the evaluation. By weighting the influences of the feeding and unloading stability evaluation index, the optical performance evaluation index of the mother shell film, the light intensity, and the dustiness, their relative importance in the evaluation index is reflected. The weights of different factors can be adjusted according to different needs, making the formula have good adaptability. It is not difficult to see that when the feeding and unloading stability evaluation index is larger, or the optical performance evaluation index of the mother shell film is larger, or the light intensity deviation is smaller, or the dustiness is smaller, the reliability evaluation value of the diopter detection is larger. By evaluating the reliability evaluation value of the diopter detection, the accuracy and reliability of the measurement results can be ensured, reducing consumer complaints and returns caused by lens quality problems, ensuring that the spectacle lenses match the consumer's eye degree, thereby improving the wearing comfort and clarity, helping to timely discover problems in the production process, such as lens processing errors, material quality problems, etc., and taking corresponding measures for improvement and optimization, further ensuring the quality and stability of the product.

[0064] In a specific embodiment, the value ranges of the influencing factors for the reliability evaluation of diopter detection corresponding to the loading and unloading stability evaluation index, the optical performance evaluation index of the mother shell film, the light intensity, and the dustiness are between 0 and 1, representing the numerical values of the influence degrees of the loading and unloading stability evaluation index, the optical performance evaluation index of the mother shell film, the light intensity, and the dustiness on the reliability evaluation value of diopter detection. Each influencing factor for the reliability evaluation of diopter detection can be obtained from the contact lens database. By adjusting the values of the influencing factors, the influence degrees of different factors on the final reliability evaluation value of diopter detection can be flexibly adjusted. Their corresponding relationship can be a pre-set mapping relationship. For example, the loading and unloading stability evaluation index, the optical performance evaluation index of the mother shell film, the light intensity, and the dustiness form a mapping set with the weight factors corresponding to the loading and unloading stability evaluation index, the optical performance evaluation index of the mother shell film, the light intensity, and the dustiness preset in the contact lens database. Substituting the real-time loading and unloading stability evaluation index, the optical performance evaluation index of the mother shell film, the light intensity, and the dustiness into the mapping set, the weight factors corresponding to the loading and unloading stability evaluation index, the optical performance evaluation index of the mother shell film, the light intensity, and the dustiness are obtained. The mapping relationship therein can be a one-to-one or many-to-one relationship.

[0065] Furthermore, early warning feedback is performed according to the reliability evaluation value of diopter detection. The specific process is as follows: Extract the reliability evaluation threshold of diopter detection from the contact lens database, compare the reliability evaluation value of diopter detection with the reliability evaluation threshold of diopter detection. If the reliability evaluation value of diopter detection is greater than or equal to the reliability evaluation threshold of diopter detection, the diopter detection is evaluated as qualified and the contact lens optical imaging data is extracted. If the reliability evaluation value of diopter detection is less than the reliability evaluation threshold of diopter detection, the diopter detection is evaluated as unqualified and feedback correction is performed, that is, relevant staff is notified for early warning.

[0066] Specifically, according to the reliability evaluation value of diopter detection and the contact lens optical imaging data, it is judged whether the contact lens diopter is qualified. The specific analysis process is as follows: The contact lens optical imaging data includes the spot size, the spot position offset, and the spot eccentricity.

[0067] Extract the reference standard spot size, the allowable deviation spot size, the critical spot position offset, and the critical spot eccentricity from the contact lens database. Combining with the reliability evaluation value of diopter detection, comprehensively analyze to obtain the lens diopter accuracy evaluation value, and judge whether the contact lens diopter is qualified according to the lens diopter accuracy evaluation value.

[0068] In a specific embodiment, a fully automatic lensometer based on a CCD (Charge-Coupled Device) measures through an optical image system. The light emitted by a point light source is collimated by a collimating mirror and then irradiates the complete film optical region. After refraction, it passes through a spectroscope and a measuring lens and is projected onto the CCD. Due to the different refractive states of the measured lens, the size, position, and shape of the image formed on the CCD will change. The spot size is the area of the image formed, the spot position offset refers to the distance between the actual spot center position and the ideal spot center position, and the spot eccentricity refers to the straight-line distance between the spot center and the optical center of the lens. These can be measured and calculated by the fully automatic lensometer based on the CCD.

[0069] Furthermore, the evaluation value of the lens power accuracy has a specific numerical expression as follows:

[0070] Wherein, represents the evaluation value of the lens power accuracy, e represents the natural constant, represents the spot size, represents the reference standard spot size, represents the allowable deviation spot size, represents the spot position offset, represents the critical spot position offset, represents the spot eccentricity, represents the critical spot eccentricity, represents the evaluation value of the reliability of the power detection, represents the influencing factor of the evaluation of the lens power accuracy corresponding to the set spot size, represents the influencing factor of the evaluation of the lens power accuracy corresponding to the set spot position offset, represents the influencing factor of the evaluation of the lens power accuracy corresponding to the set spot eccentricity, represents the influencing factor of the evaluation of the lens power accuracy corresponding to the set evaluation value of the reliability of the power detection.

[0071] The algorithm of this embodiment combines the spot size, the spot position offset, the spot eccentricity, and the reliability evaluation value of diopter detection, and comprehensively analyzes to obtain the evaluation value of the lens diopter accuracy. When evaluating the reliability of diopter detection, the spot size is an important factor to consider. A spot that deviates more from the reference standard may lead to an increase in measurement error, thereby reducing the detection reliability; at the same time, the influence of the spot position offset on the measurement result needs to be considered. The larger the offset, the more likely it is to cause inaccurate detection results, further reducing the detection reliability; and the larger the eccentricity, the more likely it is to cause inconsistent or unstable detection results, thus reducing the detection reliability; there is a certain mutual restriction relationship among the spot size, the spot position offset, and the spot eccentricity. For example, a smaller spot may be more easily affected by position offset and eccentricity, while a larger spot may reduce the influence of position offset and eccentricity, but may reduce the measurement accuracy. Through comprehensive analysis, a more comprehensive evaluation value of the lens diopter accuracy can be obtained.

[0072] It should be explained that in this embodiment, four key factors are considered, namely the spot size, the spot position offset, the spot eccentricity, and the reliability evaluation value of diopter detection, which can ensure that the measurement point is always located in the target area, avoid measurement errors caused by offset, and ensure the uniform distribution of the spot on the target surface, thereby improving the uniformity and accuracy of the measurement, helping to detect problems in the optical system in a timely manner, such as the performance degradation of the laser, damage or contamination of optical components, etc., thereby improving the processing accuracy, reducing the heat affected zone and surface roughness, thus improving the processing quality, and further quickly identifying and solving potential problems, thereby improving the detection efficiency. By weighting the influences of the spot size, the spot position offset, the spot eccentricity, and the reliability evaluation value of diopter detection, their relative importance in the evaluation index is reflected, and the weights of different factors can be adjusted according to different needs, making the formula have good adaptability. It is not difficult to see that when the deviation of the spot size is smaller, or the spot position offset is smaller, or the spot eccentricity is smaller, or the reliability evaluation value of diopter detection is larger, the evaluation value of the lens diopter accuracy is larger. By evaluating the evaluation value of the lens diopter accuracy, errors in the manufacturing process can be detected in a timely manner, thereby improving the manufacturing accuracy of the lens, helping to adjust and optimize the production process to reduce the generation of errors, improve the qualification rate of products, and ensure that consumers obtain suitable glasses, thereby reducing the risk of vision damage, being able to ensure the correction effect of the glasses, enabling consumers to see objects clearly, reducing visual fatigue and discomfort, and further enhancing the market competitiveness of the product.

[0073] In a specific embodiment, the value range of the influencing factors of the lens diopter accuracy evaluation corresponding to the spot size, the spot position offset, the spot eccentricity, and the diopter detection reliability evaluation value is between 0 and 1, which represents the numerical value of the influence degree of the spot size, the spot position offset, the spot eccentricity, and the diopter detection reliability evaluation value on the lens diopter accuracy evaluation value. Each influencing factor of the lens diopter accuracy evaluation can be obtained from the contact lens database. By adjusting the value of the influencing factor, the influence degree of different factors on the final lens diopter accuracy evaluation value can be flexibly adjusted. The corresponding relationship can be a pre-set mapping relationship. For example, the spot size, the spot position offset, the spot eccentricity, and the diopter detection reliability evaluation value form a mapping set with the weight factors corresponding to the pre-set spot size, the spot position offset, the spot eccentricity, and the diopter detection reliability evaluation value in the contact lens database. Substituting the real-time spot size, the spot position offset, the spot eccentricity, and the diopter detection reliability evaluation value into the mapping set to obtain the weight factors corresponding to the spot size, the spot position offset, the spot eccentricity, and the diopter detection reliability evaluation value. The mapping relationship therein can be a one-to-one or many-to-one relationship.

[0074] Further, determine whether the contact lens diopter is qualified according to the lens diopter accuracy evaluation value. The specific analysis process is as follows: Extract the lens diopter accuracy evaluation threshold from the contact lens database, compare the lens diopter accuracy evaluation value with the lens diopter accuracy evaluation threshold. If the lens diopter accuracy evaluation value is greater than or equal to the lens diopter accuracy evaluation threshold, evaluate the lens as a qualified finished product and perform finished product processing. If the lens diopter accuracy evaluation value is less than the lens diopter accuracy evaluation threshold, evaluate the lens as an unqualified finished product and give an alarm.

[0075] Refer to Figure 2 As shown, the second aspect of the present invention provides an indirect contact lens diopter detection system, including: a data acquisition module, configured to obtain the data of the mother shell film to be detected, and monitor the data of the loading and unloading equipment and the measurement environment data.

[0076] A diopter detection reliability analysis module, configured to process the data of the mother shell film to obtain an optical performance evaluation index of the mother shell film, process the data of the loading and unloading equipment to obtain a loading and unloading stability evaluation index, and comprehensively analyze according to the loading and unloading stability evaluation index, the measurement environment data, and the optical performance evaluation index of the mother shell film to obtain a diopter detection reliability evaluation value.

[0077] A diopter detection feedback module, configured to perform early warning feedback according to the diopter detection reliability evaluation value.

[0078] A contact lens diopter qualification evaluation module, configured to obtain the optical imaging data of the contact lens, and determine whether the contact lens diopter is qualified according to the diopter detection reliability evaluation value and the optical imaging data of the contact lens.

[0079] A contact lens database for storing contact lens - related data, including: critical glossiness, critical transparency, reference standard reflectivity, allowable deviation reflectivity, critical transmittance, critical positioning deviation, reference standard clamping force, allowable deviation clamping force, reference standard conveying speed, allowable deviation conveying speed, reference standard vibration frequency, allowable deviation vibration frequency, reference standard spot size, allowable deviation spot size, critical spot position offset, critical spot eccentricity, influence factors of the reliability evaluation of diopter detection corresponding to the set optical performance evaluation index of the mother shell film, influence factors of the reliability evaluation of diopter detection corresponding to the set feeding and unloading stability evaluation index, influence factors of the reliability evaluation of diopter detection corresponding to the set light intensity, influence factors of the reliability evaluation of diopter detection corresponding to the set dustiness, and the evaluation threshold of lens diopter accuracy, etc.

[0080] The above content is only an example and explanation of the structure of the present invention. Those skilled in the art of this technology can make various modifications, supplements or use similar methods to replace the specific embodiments described. As long as they do not deviate from the structure of the invention or exceed the scope defined by the present invention, they should fall within the protection scope of the present invention.

Claims

1. A method for indirect detection of contact lens focal power, characterized in that: include: Obtain the data of the mother shell membrane to be tested, and monitor the loading and unloading equipment data and measurement environment data; The mother shell film data is processed to obtain the mother shell film optical performance evaluation index, and the loading and unloading equipment data is processed to obtain the loading and unloading stability evaluation index. According to the loading and unloading stability evaluation index, the measurement environment data and the mother shell film optical performance evaluation index, a comprehensive analysis is performed to obtain the focal detection reliability evaluation value; Provide early warning feedback based on the reliability evaluation value of focal detection; Obtain the optical imaging data of the contact lens, and determine whether the focal length of the contact lens is qualified based on the focal length detection reliability evaluation value and the optical imaging data of the contact lens.

2. A contact lens focal power indirect detection method according to claim 1, characterized in that: The mother shell film data is processed to obtain the mother shell film optical performance evaluation index, and the specific analysis process is as follows: The mother shell film data includes glossiness, transparency, reflectivity and transmittance; The critical gloss, critical transparency, critical reflectivity and critical transmittance are extracted from the contact lens database, and the optical performance evaluation index of the mother shell film is obtained through comprehensive analysis. The optical performance evaluation index of the mother shell film is then used to determine whether the mother shell film should be replaced.

3. A contact lens focal power indirect detection method according to claim 2, characterized in that: The specific analysis process of judging whether to replace the mother shell film according to the mother shell film optical performance evaluation index is as follows: The optical performance evaluation threshold of the mother shell membrane is extracted from the contact lens database, and the optical performance evaluation index of the mother shell membrane is compared with the optical performance evaluation threshold of the mother shell membrane. If the optical performance evaluation index of the mother shell membrane is greater than or equal to the optical performance evaluation threshold of the mother shell membrane, no additional operation is performed; if the optical performance evaluation index of the mother shell membrane is less than the optical performance evaluation threshold of the mother shell membrane, the mother shell membrane is replaced.

4. The indirect detection method of contact lens focal power according to claim 1, characterized in that: The loading and unloading equipment data is processed to obtain the loading and unloading stability evaluation index, and the specific analysis process is as follows: The loading and unloading equipment data includes positioning deviation, clamping force, conveying speed and vibration frequency of each loading and unloading; The critical positioning deviation, reference standard clamping force, allowable deviation clamping force, reference standard conveying speed, allowable deviation conveying speed, reference standard vibration frequency and allowable deviation vibration frequency were extracted from the contact lens database, and a comprehensive analysis was performed to obtain the loading and unloading stability evaluation index.

5. The indirect detection method of contact lens focal power according to claim 4, characterized in that: According to the loading and unloading stability evaluation index, the measurement environment data and the mother shell film optical performance evaluation index, a comprehensive analysis is performed to obtain the focal detection reliability evaluation value. The specific analysis process is as follows: The measured environment data includes light intensity and dust level at each time node; The reference standard light intensity, allowable deviation light intensity and critical dust degree are extracted from the contact lens database, and the focal detection reliability evaluation value is obtained by comprehensive analysis based on the loading and unloading stability evaluation index and the mother shell film optical performance evaluation index. The focal detection reliability evaluation value is used to quantify the reliability of the focal detection process.

6. A contact lens power indirect detection method according to claim 5, characterized in that: The specific process of performing early warning feedback according to the focal detection reliability evaluation value is as follows: A focal detection reliability assessment threshold is extracted from the contact lens database, and the focal detection reliability assessment value is compared with the focal detection reliability assessment threshold. If the focal detection reliability assessment value is greater than or equal to the focal detection reliability assessment threshold, the focal detection is assessed as qualified and the contact lens optical imaging data is extracted. If the focal detection reliability assessment value is less than the focal detection reliability assessment threshold, the focal detection is assessed as unqualified and feedback correction is performed.

7. The indirect detection method of contact lens focal power according to claim 1, characterized in that: The focal length of the contact lens is determined to be qualified according to the focal length detection reliability evaluation value and the contact lens optical imaging data. The specific analysis process is as follows: The contact lens optical imaging data includes spot size, spot position offset and spot eccentricity; The reference standard spot size, allowable deviation spot size, critical spot position offset and critical spot eccentricity are extracted from the contact lens database, and combined with the focal power detection reliability evaluation value, a comprehensive analysis is performed to obtain the lens focal power accuracy evaluation value. The qualified contact lens focal power is judged based on the lens focal power accuracy evaluation value.

8. The indirect detection method of contact lens focal power according to claim 7, characterized in that: The specific analysis process of judging whether the focal power of the contact lens is qualified according to the focal power accuracy evaluation value of the lens is as follows: A lens power accuracy assessment threshold is extracted from the contact lens database, and the lens power accuracy assessment value is compared with the lens power accuracy assessment threshold. If the lens power accuracy assessment value is greater than or equal to the lens power accuracy assessment threshold, the lens is assessed as a qualified finished product and processed as a finished product. If the lens power accuracy assessment value is less than the lens power accuracy assessment threshold, the lens is assessed as an unqualified finished product and an alarm is issued.

9. The indirect detection method of contact lens focal power according to claim 5, characterized in that: The focal detection reliability evaluation value is a quantitative index obtained by analyzing the loading and unloading stability evaluation index, the mother shell film optical performance evaluation index, the light intensity and dust degree at each time node, and is used to quantify the reliability of focal detection.

10. A system using the indirect detection method for contact lens focal power according to any one of claims 1 to 9, characterized in that: include: The data acquisition module is used to obtain the data of the mother shell membrane to be tested, and monitor the loading and unloading equipment data and the measurement environment data; The focal detection reliability analysis module is used to process the mother shell film data to obtain the mother shell film optical performance evaluation index, process the loading and unloading equipment data to obtain the loading and unloading stability evaluation index, and comprehensively analyze the loading and unloading stability evaluation index, the measurement environment data and the mother shell film optical performance evaluation index to obtain the focal detection reliability evaluation value; A focal detection feedback module, used for providing early warning feedback according to a focal detection reliability evaluation value; The contact lens focal length qualification assessment module is used to obtain the contact lens optical imaging data and determine whether the contact lens focal length is qualified based on the focal length detection reliability assessment value and the contact lens optical imaging data.

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