Method for optimizing the geometric parameters of a semi-finished optical lens
By optimizing the geometric parameters of semi-finished optical lenses, the problem of lens material waste has been solved, and a more efficient lens manufacturing process has been achieved, which can meet the needs of common ophthalmic prescriptions and frames.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- ESSILOR INTERNATIONAL(COMPAGNIE GENERALE D OPTIQUE)
- Filing Date
- 2023-03-30
- Publication Date
- 2026-07-10
AI Technical Summary
Existing technologies for manufacturing ophthalmic lenses result in material waste due to the geometric design of semi-finished optical lenses, especially for common ophthalmic prescriptions and frames, where lens materials cannot be used efficiently.
By optimizing the geometric parameters of semi-finished optical lenses, including determining their base curve and initial geometry, and combining order ratio data and expected selectivity, the diameter, thickness, and surface curvature of the semi-finished lenses are optimized to ensure that corresponding finished ophthalmic lenses can be manufactured, thereby reducing material waste.
This technology reduces waste of lens materials during manufacturing, optimizes lens geometry to meet common ophthalmic prescriptions and frame requirements, and improves material utilization efficiency.
Smart Images
Figure CN116890472B_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to a method, for example implemented by a computer device, for optimizing the geometric parameters of at least one semi-finished optical lens in a set of semi-finished optical lenses having a specified lens material, the semi-finished optical lens to be optimized having a specified base curve and an initially determined geometry, the initially determined geometry being determined to allow the manufacture of finished ophthalmic lenses for an initial set of ophthalmic parameters.
[0002] This disclosure further relates to a data processing apparatus for optimizing the geometric parameters of at least one semi-finished optical lens in a set of semi-finished optical lenses having a specified lens material, the semi-finished optical lens to be optimized having a specified base curve and an initially determined geometry, the initially determined geometry being determined to allow the manufacture of finished ophthalmic lenses for an initial set of ophthalmic parameters. Background Technology
[0003] The discussion of the background of this disclosure is included in this document to explain the context of this disclosure.
[0004] Optical lenses are typically manufactured according to the wearer's instructions. For example, in the case of ophthalmic lenses used to correct or improve vision, the lenses are manufactured according to a wearer's prescription that corresponds to the wearer's vision requirements. Additionally, the shape and size of the eyeglass frame that supports the ophthalmic lens are considered. At least one surface of the ophthalmic lens is processed to provide an ophthalmic lens that conforms to the wearer's prescription. The contour of the ophthalmic lens is trimmed according to the shape of the eyeglass frame to which it will be mounted.
[0005] Optical lenses are typically made from semi-finished optical lenses. Semi-finished optical lenses usually have two opposing surfaces, at least one of which is unfinished.
[0006] Typically, lens manufacturers receive lens orders that include the wearer's prescription data. Based on the prescription data, the lens manufacturer selects semi-finished optical lenses for further grinding and polishing to produce lenses that conform to the wearer's prescription.
[0007] This assembly of semi-finished optical lenses is made of a specified lens material having a specified refractive index (e.g., 1.56), and each of the semi-finished optical lenses has a defined geometry that is determined to allow the manufacture of finished optical lenses for substantially all ophthalmic lens prescriptions. The base curve of the semi-finished optical lens provides surface power for a first lateral surface (e.g., anterior surface), which, when combined with a second lateral surface (e.g., posterior surface, facing the wearer's eye), after being ground and polished, produces the desired refractive function for the wearer's eye under wearing conditions.
[0008] For example, a lens manufacturer produces a set containing twenty different semi-finished optical lenses, each with a different base curve. Therefore, each of the semi-finished optical lenses (also called blanks or discs) in this set satisfies a subset of the wearer's and / or frame data to produce a suitable finished optical lens.
[0009] As described above, the geometry of each lens in the existing exemplary assembly of semi-finished optical lenses is determined to allow a wide range of ophthalmic prescriptions to be assigned to each resulting base curve. In other words, each semi-finished optical lens in the assembly is designed with a geometry that is thick and large enough in diameter to allow the manufacture of substantially all prescriptions assigned to the semi-finished optical lens. To this end, thick and large-diameter semi-finished optical lenses are produced to fit all prescriptions and frame sizes, including some rare prescriptions outside of common prescription specifications.
[0010] Unfortunately, for ordinary prescriptions that do not require such thick and large semi-finished optical lenses, there is a significant waste of lens material during the grinding, polishing, and trimming steps.
[0011] Therefore, the purpose of this disclosure is to provide a method for optimizing the geometric parameters of at least one semi-finished optical lens in a semi-finished ophthalmic lens assembly to minimize optical lens material waste, for example, at least for the most common ophthalmic prescriptions and / or eyeglass frames. Summary of the Invention
[0012] To this end, this disclosure proposes a method, for example implemented by a computer device, for optimizing the geometric parameters of at least one semi-finished optical lens in a set of semi-finished optical lenses having a specified lens material.
[0013] The semi-finished optical lens to be optimized has a specified base curve and an initially determined geometry, which is determined to allow the manufacture of a finished ophthalmic lens for an initial set of ophthalmic parameters. The method includes:
[0014] - Provides order proportion data indicating the proportion of each ophthalmology prescription in the initial set of ophthalmology parameters.
[0015] -Provide the expected percentage of selection.
[0016] -Based on order ratio data, determine the subset of ophthalmic parameters included in the initial ophthalmic parameter set that corresponds to the provided expected ratio selection rate.
[0017] - Determine optimized values for at least one geometric parameter of an optimized semi-finished optical lens, the optimized semi-finished optical lens having a specified base curve and a specified lens material, and allowing the manufacture of finished ophthalmic lenses for each ophthalmic prescription included in a subset of ophthalmic parameters.
[0018] - The determined optimized value of at least one geometric parameter of the optimized semi-finished optical lens is output as the optimized geometric parameter of the semi-finished optical lens.
[0019] The semi-finished lens to be optimized is a model of a semi-finished lens that needs to be redefined in order to reduce waste in the manufacture of ophthalmic lenses.
[0020] Advantageously, the method according to this disclosure allows for the provision of an optimized set of semi-finished optical lenses that allows the manufacture of all optical lenses corresponding to each ophthalmic prescription included in the subset of ophthalmic prescriptions, and can be optimized in terms of the number of different lens blanks and / or the price of different optical lens blanks and / or the amount of material to be removed from the semi-finished optical lens blanks to manufacture the optical lenses.
[0021] In other words, unlike what has been done to date, the method disclosed herein allows for the optimization of the geometric parameters of semi-finished optical lenses, while allowing for the manufacture of finished ophthalmic lenses for each ophthalmic prescription included in a subset of ophthalmic parameters corresponding to the desired selectivity.
[0022] According to further embodiments that can be considered individually or in combination:
[0023] -Each lens in a semi-finished optical lens assembly (e.g., at least two lenses) has:
[0024] ○ Different diameters, and / or
[0025] ○ The different thicknesses at the center of the semi-finished optical lens, and / or
[0026] ○ The varying thicknesses at the periphery of semi-finished optical lenses, and / or
[0027] ○ Different shapes of the back surface of a semi-finished optical lens, such as the curvature of the back surface of the semi-finished optical lens; and / or
[0028] -The different lenses in the semi-finished optical lens assembly have different thicknesses at the center and / or periphery; and / or
[0029] - The number of different semi-finished optical lenses in the semi-finished optical lens collection is determined based on the number of lenses ordered from the lens manufacturer; and / or
[0030] - The number of different semi-finished optical lenses in the semi-finished lens set is limited, for example, limited to three different semi-finished optical lenses; and / or
[0031] - The number of different semi-finished optical lenses is obtained based on previously manufactured optical lenses or new optical lenses that the manufacturer may have to manufacture; and / or
[0032] - The optimization of at least one semi-finished optical lens is obtained based on previously manufactured optical lenses or new optical lenses that the manufacturer may have to manufacture; and / or
[0033] - Order proportion data indicating the proportion of each ophthalmic prescription is based on optical lenses ordered from lens manufacturers over a past period, such as between one month and one year prior to optimization, for example, corresponding to at least the last 500 ophthalmic lenses ordered, for example, corresponding to at least the last 1000 ophthalmic lenses ordered, for example, corresponding to at least the last 10000 ophthalmic lenses ordered; and / or
[0034] - Determining the optimized value of at least one geometric parameter of the optimized semi-finished optical lens includes, for example, determining and calculating a global cost function, which includes:
[0035] ○ Supply cost function,
[0036] ○ Cost function of semi-finished optical lenses, and
[0037] ○ Material cost function; and / or
[0038] - The total volume of the optimized semi-finished optical lens is smaller than the total volume of the semi-finished optical lens to be optimized; and / or
[0039] - The optimized lens has the same base curve as its determined semi-finished lens, and at least has different parameters, including center thickness, peripheral thickness, back curvature, and diameter; and / or,
[0040] - The initial set of ophthalmic parameters and subsets of ophthalmic parameters comprise a set of discrete values for prescription parameters, and for each prescription parameter, the initial set includes all discrete values between two extreme values, such as spherical power and cylindrical power and / or spherical power and cylindrical power and diameter; and / or
[0041] - The set of discrete values for the prescription parameters has increments greater than or equal to 0.05 diopters, for example, greater than or equal to 0.1 diopters, and less than or equal to 0.5 diopters, for example, less than or equal to 0.25 diopters; and / or
[0042] - The initial set of ophthalmic parameters includes at least several ophthalmic prescriptions with a cylinder power of less than or equal to 0.1 diopters, for example, equal to 0 diopters; and / or
[0043] - The subset of ophthalmic parameters includes at least a number of ophthalmic prescriptions with a cylinder power of less than or equal to 0.1 diopters, for example, equal to 0 diopters; and / or
[0044] - A subset of ophthalmic parameters corresponds to a uniform scaling transformation of the initial set of ophthalmic parameters in a two-dimensional representation of ophthalmic prescription parameters, such as spherical and cylindrical power representations; and / or
[0045] - The geometric parameter is at least one of the following:
[0046] ○ The diameter of the semi-finished optical lens
[0047] ○ The thickness at the center of the semi-finished optical lens
[0048] ○ The thickness at the periphery of the semi-finished optical lens,
[0049] ○ The shape of the rear surface of the semi-finished optical lens, such as the curvature of the rear surface of the semi-finished optical lens; and / or
[0050] - The expected percentage of selection is greater than or equal to 50%, for example, greater than or equal to 60%, and less than or equal to 95%, for example, less than or equal to 80%; and / or
[0051] - After determining the subset of ophthalmic parameters corresponding to the provided desired proportion of selection, determine the minimum subset of ophthalmic parameters; and / or
[0052] - Repeat the steps of determining a subset of ophthalmic parameters and determining optimized values for at least one geometric parameter to determine a subset of ophthalmic parameters that allows the optimized semi-finished optical lens to have the minimum overall volume; and / or
[0053] - After the optimized semi-finished optical lenses have been identified, the effective proportion selection rate of the optimized semi-finished optical lenses is determined based on the provided order proportion data.
[0054] The effective proportion selection rate is compared with the provided expected proportion selection rate, and the steps of determining a subset of ophthalmic parameters and determining an optimized value for at least one geometric parameter are repeated using the smaller expected proportion selection rate.
[0055] This disclosure also relates to a method, for example implemented by a computer device, for optimizing the geometric parameters of at least one semi-finished optical lens in a set of semi-finished optical lenses having a specified lens material, the semi-finished optical lens to be optimized having a specified base curve and an initially determined geometry, the initially determined geometry being determined to allow the manufacture of finished ophthalmic lenses for an initial set of ophthalmic parameters, wherein the method includes the step of repeating the method according to this disclosure at different desired ratio selection rates, wherein at each repetition, a volume difference between the optimized semi-finished optical lens and the initial semi-finished optical lens is determined, and the method further includes determining a ratio that provides the maximum volume difference and the optimized semi-finished optical lens.
[0056] This disclosure also relates to a data processing apparatus including a processor configured to perform steps of at least one method of this disclosure.
[0057] For example, this disclosure relates to a data processing apparatus for optimizing the geometric parameters of at least one semi-finished optical lens in a set of semi-finished optical lenses having a specified lens material, the semi-finished optical lens to be optimized having a specified base curve and an initially determined geometry, the initially determined geometry being determined to allow the manufacture of finished ophthalmic lenses for an initial set of ophthalmic parameters, wherein the apparatus includes: at least one input terminal configured to:
[0058] - Obtain order proportion data indicating the proportion of each ophthalmology prescription in the initial set of ophthalmology parameters.
[0059] - To obtain the desired percentage of selections
[0060] At least one processor, the at least one processor being configured to:
[0061] -Based on order ratio data, determine the subset of ophthalmic parameters included in the initial ophthalmic parameter set that corresponds to the provided expected ratio selection rate.
[0062] - Determine optimized values for at least one geometric parameter of an optimized semi-finished optical lens, the optimized semi-finished optical lens having a specified base curve and lens material, and allowing the manufacture of finished ophthalmic lenses for each ophthalmic prescription included in a subset of ophthalmic parameters, wherein the total volume of the optimized semi-finished optical lens is smaller than the total volume of the semi-finished optical lens to be optimized.
[0063] At least one output terminal, which is configured to:
[0064] - The determined optimized value of at least one geometric parameter of the optimized semi-finished optical lens is output as the optimized geometric parameter of the semi-finished optical lens.
[0065] According to a further aspect, this disclosure relates to a computer program product comprising one or more stored instruction sequences that are accessible by a processor and, when executed by the processor, cause the processor to perform steps of at least one method according to this disclosure.
[0066] According to another aspect, this disclosure relates to a program that causes a computer to perform at least one method disclosed herein.
[0067] This disclosure also relates to a computer-readable medium that carries one or more sequences of instructions of a computer program according to this disclosure.
[0068] This disclosure further relates to a computer-readable storage medium having a program recorded thereon; wherein the program causes a computer to perform at least one method of this disclosure.
[0069] This disclosure relates to an apparatus including a processor adapted to store one or more sequences of instructions and perform at least one step of at least one method according to this disclosure. Attached Figure Description
[0070] Non-limiting embodiments of this disclosure will now be described with reference to the accompanying drawings, in which:
[0071] ○ Figure 1 The optical lenses to be manufactured were displayed.
[0072] ○ Figure 2 This represents the distribution of prescription data for each base curve of the semi-finished ophthalmic lenses in the initial set.
[0073] ○ Figure 3 The flowchart of the method according to this disclosure, and
[0074] ○ Figure 4 This indicates the distribution of prescription data for each base curve of semi-finished ophthalmic lenses in the optimized set disclosed herein, and
[0075] ○ Figure 5 This refers to the data processing equipment disclosed herein.
[0076] The elements in the accompanying drawings are shown for simplicity and clarity and are not necessarily drawn to scale. For example, the dimensions of some elements in the figures may be enlarged relative to other elements to aid in understanding the embodiments disclosed herein. Detailed Implementation
[0077] Within the framework of this disclosure, the following terms have the meanings indicated below.
[0078] The term "optical lens" should be understood to mean any type of known lens intended to be placed in front of a wearer's eyes. This term can refer to ophthalmic lenses, such as uncorrected lenses, unfinished lens blanks, and corrective lenses, such as progressive multifocal lenses, monofocal lenses, or multifocal lenses. The term can also refer to ophthalmic lenses that may exhibit at least one additional value, such as tint, polarizing filter, electrochromic properties, anti-reflective properties, scratch resistance, or include photochromic units or light-guiding units…
[0079] The term “semi-finished optical lens” should be understood to mean any type of known optical lens having two opposing surfaces, at least one of which is unfinished.
[0080] The term "prescription" should be understood to mean at least a set of optical properties that include optical power (spherical and cylindrical) and ultimately astigmatism, prism deviation, and, where appropriate, additional refraction, determined by an ophthalmologist or optometrist to correct a wearer's visual impairment, for example, by means of a lens placed in front of the wearer's eye. For example, a prescription for a progressive multifocal lens includes optical power and astigmatism values at the far point and, where appropriate, additional refraction. Prescription data may include data for emmetropia.
[0081] Unless otherwise specifically stated, it will be apparent from the following discussion that throughout the specification, the use of terms such as “determine,” “calculate,” “operate” refers to the actions and / or processes of a computer or computing system or similar electronic computing device that manipulate and / or convert data represented as physical (e.g., electronic) quantities within the registers and / or memory of the computing system into other data similarly represented as physical quantities within the memory, registers, or other such information storage, transmission, or display devices of the computing system.
[0082] Embodiments disclosed herein may include means for performing the operations described herein. Such means may be specifically constructed for the desired purpose, or may include a general-purpose computer or a digital signal processor (“DSP”) selectively activated or reconfigured by a computer program stored in the computer. Such a computer program may be stored in a computer-readable storage medium, such as, but not limited to, any type of disk, read-only memory (ROM), random access memory (RAM), electronically programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), magnetic or optical cards, or any other type of medium suitable for storing electronic instructions and capable of being coupled to a computer system bus.
[0083] The processes and displays mentioned herein are not inherently associated with any particular computer or other device. Various general-purpose systems can be used with the programs taught herein, or they may prove convenient to construct more specialized devices to perform the desired methods. The desired architectures of various such systems will become apparent from the description below. Furthermore, the embodiments disclosed herein are described without reference to any particular programming language. It should be understood that the teachings of this disclosure can be implemented using various programming languages.
[0084] This disclosure relates to a method, implemented, for example by a computer device, for optimizing the geometric parameters of at least one semi-finished optical lens in a set of semi-finished optical lenses having a specified lens material having a specified refractive index, such as 1.50 to 1.74.
[0085] All optical lenses in this semi-finished optical lens assembly include surfaces with the same curvature, and all semi-finished optical lenses included in this assembly have finished surfaces and unfinished surfaces with a geometric center reference point. Preferably, the finished surfaces of all semi-finished optical lenses in this assembly have the same curvature.
[0086] Each of the semi-finished optical lenses in the semi-finished optical lens assembly has a defined geometry that is determined to allow the semi-finished optical lens assembly to be manufactured into finished optical lenses for substantially all ophthalmic lens prescriptions, such as ophthalmic prescriptions for spherical power in the range of -8D to 8D and cylindrical power in the range of 0D to 6D.
[0087] It should be recognized that extremely unusual ophthalmic prescriptions (e.g., clinically rare) are manufactured as special cases using very large semi-finished optical lenses and are not considered part of the "standard range population" (i.e., virtually all ophthalmic lens prescriptions).
[0088] like Figure 1 As shown, the semi-finished optical lens 10 to be optimized has a first optical surface 12, a second optical surface 14, and an outer peripheral surface 16 connecting the first optical surface 12 and the second optical surface 14.
[0089] Those skilled in the art will recognize that the first and / or second surfaces can be spherical, aspherical, and / or progressive surfaces. It will also be recognized that the defined geometry of the lenses in this set varies with different specified refractive indices; for example, a lens with a refractive index of 1.57 is thinner than a lens with a refractive index of 1.53.
[0090] The semi-finished optical lens 10 to be optimized has a specified base curve and an initially determined geometry, which is determined to allow the manufacture of finished ophthalmic lenses for an initial set of ophthalmic prescriptions.
[0091] The base curve on a semi-finished optical lens provides surface power to a first surface (e.g., the front surface), which, when combined with a second surface (e.g., the rear surface, which faces the wearer's eye when mounted in a frame and worn by the wearer), produces the desired refractive function after being ground and polished.
[0092] Figure 2 An example of prescription data representation is shown, where the y-axis represents spherical power and the x-axis represents cylindrical power.
[0093] Figure 2 The document illustrates a collection of semi-finished optical lenses made from specified lens materials with different base curves, effectively covering the entire range of ophthalmic prescriptions. Figure 2In the example, the spherical power ranges from -8.5D to 8.5D, and the cylindrical power ranges from 0D to 6D. Figure 2 In the example, different semi-finished optical lenses correspond to different ophthalmic prescriptions; however, for a given ophthalmic prescription, there can be two or more different semi-finished optical lenses. In other words, two different semi-finished optical lenses can correspond to the same ophthalmic prescription.
[0094] This assembly of semi-finished optical lenses has an initially defined geometry for each lens, which includes a number of different base curves to cover a range of ophthalmic prescriptions. Those skilled in the art will understand that... Figure 2 The different base curve boundaries shown above are purely for illustrative purposes and do not necessarily represent actual base curve boundaries. For example, the depiction may be based on additional parameters, such as additional power, prism power, eccentricity, and diameter requirements. According to a further embodiment, each lens in the semi-finished optical lens assembly has an initially determined thickness at the periphery of the semi-finished optical lens and / or an initially determined thickness and / or an initially determined diameter and / or an initially determined curvature at the center of the semi-finished optical lens, such as the curvature of the rear surface of the semi-finished optical lens.
[0095] According to an embodiment, determining the optimized value of at least one geometric parameter of the optimized semi-finished optical lens may include determining, for example, calculating a global cost function, which includes:
[0096] -Supply cost function,
[0097] - Cost function of semi-finished lenses, and
[0098] - Material cost function.
[0099] The supply cost function is a function of the quantity of different semi-finished optical lenses included in the set of semi-finished optical lenses. The semi-finished lens cost function is a function of the price of the semi-finished optical lenses included in the set of semi-finished optical lenses. The material cost function is a function of the amount of material removed from the semi-finished optical lenses to provide optical lenses suitable for the provided data. The global cost function does not exclude any of the cost functions mentioned above because it is stipulated that each of the weights in the global cost function is non-zero.
[0100] Predictions for optical lenses can be made based on previously manufactured optical lenses or new types of optical lenses that the manufacturer may have to manufacture.
[0101] The set of semi-finished optical lenses considered in the optimization method of the present invention can correspond to optical lenses manufactured by the lens manufacturer in the past period of time, such as between one month and one year before optimization.
[0102] Different lenses in a semi-finished optical lens assembly may have different thicknesses at the center and / or periphery of the lens.
[0103] The number of semi-finished lenses can be limited, for example, to three different sets of semi-finished lenses.
[0104] According to an embodiment, the optimized lens has the same base curve as its determined semi-finished lens, but has at least different parameters, including center thickness, peripheral thickness, back curvature, and diameter.
[0105] exist Figure 2 In the example shown, there are 14 different determined base curves for semi-finished optical lenses SF1 to SF14 in the semi-finished optical lens set. These determined base curves are determined to substantially cover all prescriptions. These base curves can be determined using existing base curve selection charts.
[0106] The method disclosed herein allows for the optimization of at least one semi-finished optical lens (e.g. Figure 2 The geometric parameters of the semi-finished optical lens (SF8) are specified. Those skilled in the art will understand that the method of the present invention can be implemented for multiple defined base curves of the semi-finished optical lens in order to optimize the entire assembly of semi-finished optical lenses.
[0107] The initial geometry of the semi-finished optical lens SF8 is determined to allow the manufacture of finished ophthalmic lenses for an initial set of ophthalmic parameters (e.g., an ophthalmic prescription with spherical power greater than or equal to -1.25D and less than or equal to 1.25D and cylindrical power greater than or equal to 0D and less than or equal to 6D).
[0108] According to embodiments of this disclosure, the initial set of ophthalmic parameters includes a set of discrete values for ophthalmic parameters, and for each ophthalmic parameter, the initial set includes all discrete values between two extreme values. For example, the initial set of ophthalmic parameters includes a set of discrete values for prescription parameters, and for each prescription parameter, the initial set includes all discrete values between two extreme values, such as spherical power and cylindrical power and / or spherical power and cylindrical power and diameter.
[0109] The set of discrete values for prescription parameters can have increments greater than or equal to 0.05 diopters, for example, greater than or equal to 0.1 diopters, and less than or equal to 0.5 diopters, for example, less than or equal to 0.25 diopters.
[0110] like Figure 2 As shown, the initial set of ophthalmic parameters may include at least a number of ophthalmic prescriptions with a cylinder power of less than or equal to 0.1 diopters, for example, equal to 0 diopters.
[0111] like Figure 3 As shown, the method according to this disclosure includes at least:
[0112] - Order ratio data is provided in step S1.
[0113] -Expected proportion of selection rate provides step S2,
[0114] - Step S3 for determining the subset of ophthalmic parameters
[0115] - Step S4 is determined by optimizing the geometric parameters, and
[0116] - Output step S5.
[0117] During the order proportion data provision S1 period, order proportion data indicating the proportion of each ophthalmological parameter (e.g., each ophthalmological prescription in the initial set of ophthalmological parameters) is provided.
[0118] When the initial set of ophthalmological parameters includes a discrete set of data, the order ratio data can be discrete values.
[0119] The initial set of ophthalmological parameters can be expressed as a continuous function, and therefore the order proportion data can be further expressed as a continuous function.
[0120] exist Figure 2 In the example shown, the initial set of ophthalmic parameters includes a discrete set of prescription values for spherical and cylindrical power, and the order ratio data can be expressed as the ratio of each pair of spherical and cylindrical power values.
[0121] Order ratio data is typically determined based on past orders. To improve the accuracy of the methods disclosed herein, it is best to base order ratio data on a large number of past orders, such as at least 20,000 orders.
[0122] During step S2, the desired proportion selection rate is provided. The desired proportion selection rate corresponds to the target proportion of orders that can be manufactured from optimized semi-finished optical lenses within the initial set of ophthalmic parameters (e.g., prescription parameters).
[0123] For example, the expected percentage of selection is greater than or equal to 50%, for example, greater than or equal to 60%, and less than or equal to 95%, for example, less than or equal to 80%.
[0124] The target ratio of 80% means that optimized semi-finished optical lenses should allow for the manufacture of 80% of finished ophthalmic lenses for the initial set of ophthalmic parameters (e.g., the initial set of ophthalmic prescriptions).
[0125] During the ophthalmology parameter subset determination step S3, a subset of ophthalmology parameters corresponding to the provided desired proportion selection rate is determined based on order ratio data. For example, during the ophthalmology parameter subset determination step S3, a subset of ophthalmology prescriptions included in the initial ophthalmology prescription set is determined.
[0126] As for the initial set of ophthalmic parameters, a subset of ophthalmic parameters can be expressed as a set of discrete values or a continuous function.
[0127] According to embodiments of this disclosure, the subset of ophthalmic parameters is expressed in the same manner as the initial set of ophthalmic parameters.
[0128] Typically, the initial set of ophthalmic parameters and subsets of ophthalmic parameters comprise a set of discrete values for prescription parameters, and for each prescription parameter, the initial set includes all discrete values between two extreme values, such as spherical power and cylindrical power and / or spherical power and cylindrical power and diameter.
[0129] According to embodiments disclosed herein, the initial set of ophthalmic parameters and the set of discrete values of prescription parameters in the subset of ophthalmic parameters have the same increment, for example, greater than or equal to 0.05 diopters, for example, greater than or equal to 0.1 diopters, and less than or equal to 0.5 diopters, for example, less than or equal to 0.25 diopters.
[0130] According to embodiments disclosed herein, the initial set of ophthalmic parameters includes at least a plurality of ophthalmic prescriptions having a cylinder power of less than or equal to 0.1 diopters, for example, equal to 0 diopters, and the subset of ophthalmic parameters includes at least a plurality of ophthalmic prescriptions having a cylinder power of less than or equal to 0.1 diopters, for example, equal to 0 diopters.
[0131] Preferably, the subset of ophthalmic parameters is a joint set of discrete values of ophthalmic parameters (e.g., ophthalmic prescriptions).
[0132] According to embodiments of this disclosure, during the subset determination step, a minimum subset of ophthalmic parameters corresponding to the provided desired scaling factor is determined. The minimum subset is understood to have the minimum surface area in a two-dimensional representation of the ophthalmic parameter, or the minimum volume in a three-dimensional representation of the ophthalmic parameter.
[0133] Alternatively or in combination, a subset of ophthalmic parameters may be a minimal subset of ophthalmic parameters that includes one of the limits of the initial set.
[0134] If multiple subsets of ophthalmic parameters can be determined, then the technician can select one of those subsets based on their experience or randomly.
[0135] According to embodiments of this disclosure, a subset of ophthalmic parameters corresponds to a uniform scaling of the initial set of ophthalmic parameters in a two-dimensional representation of ophthalmic parameters.
[0136] For example, a subset of ophthalmic prescriptions corresponds to a uniform scaling of the initial set of ophthalmic prescriptions in a two-dimensional representation of ophthalmic prescriptions, such as spherical and cylindrical diopter representations.
[0137] During step S4, when optimizing geometric parameters are determined, at least one geometric parameter of the optimized semi-finished optical lens is determined. The optimized semi-finished optical lens has a specified base curve and a specified lens material, and allows for the manufacture of finished ophthalmic lenses for each ophthalmic prescription included in the subset of ophthalmic parameters.
[0138] According to embodiments of this disclosure, the total volume of the optimized semi-finished optical lens is smaller than the total volume of the semi-finished optical lens to be optimized. Advantageously, the optimized semi-finished optical lens allows for reduced waste during the manufacture of ophthalmic lenses. In fact, the method disclosed herein allows for optimization of the volume of the semi-finished optical lens for a desired proportion selectivity.
[0139] The geometric parameters of the semi-finished optical lens to be optimized can be at least one of the following:
[0140] - The diameter of the semi-finished optical lens
[0141] -Thickness at the center of the semi-finished optical lens
[0142] - The thickness at the periphery of the semi-finished optical lens.
[0143] - The shape of the back surface of a semi-finished optical lens, such as the curvature of the back surface of the semi-finished optical lens.
[0144] The optimized geometry parameter determination step S4 can be implemented using an optimization algorithm. Typically, this algorithm iteratively identifies optimized values for at least one geometry parameter based on previously interpreted constraints. Those skilled in the art will recognize that this algorithm can solve both linear and nonlinear optimization problems. Those skilled in the art can select and configure algorithms to implement the optimized geometry parameter determination step.
[0145] During the output step S5, the determined optimized value of at least one geometric parameter of the optimized semi-finished optical lens is output as the optimized geometric parameter of the semi-finished optical lens.
[0146] According to embodiments of this disclosure, the determined optimized value of at least one geometric parameter of the optimized semi-finished optical lens is output together with a corresponding subset of ophthalmic parameters (e.g., a subset of ophthalmic prescriptions).
[0147] The output can be a new representation of the set of ophthalmic parameters, in which the initial subset is subdivided and the corresponding initial and optimized semi-finished optical lenses are displayed. Figure 4An example is provided in which an optimized semi-finished optical lens OSF10 and a corresponding subset of ophthalmic parameters have been determined for the semi-finished SF10.
[0148] As mentioned earlier, during the ophthalmology parameter subset determination step S3, multiple ophthalmology parameter subsets included in the initial ophthalmology parameter set and corresponding to the desired proportion selection rate can be found.
[0149] According to embodiments of this disclosure, the steps of determining a subset of ophthalmic parameters and determining optimized values for at least one geometric parameter are repeated in order to determine a subset of ophthalmic parameters that allows the optimized semi-finished optical lens to have a minimum overall volume.
[0150] In other words, the method according to this disclosure may include iterative repetition of the steps of determining a subset of ophthalmic parameters and determining optimized values of at least one geometric parameter to minimize the total volume of the optimized semi-finished optical lens. Advantageously, the method of this disclosure allows for the determination of a semi-finished optical lens with the smallest volume, which allows for a proportion ratio that achieves at least a desired proportion ratio on an initial set of ophthalmic parameters.
[0151] At least a portion of the geometric parameters of the optimized semi-finished optical lens are determined by specific ophthalmic parameters from a subset of ophthalmic parameters.
[0152] For example, in Figure 4 In this study, the peripheral thickness of the semi-finished optical lens OSF10 is determined by an ophthalmic prescription that has the minimum cylindrical power (close to 0D) and the maximum absolute value of spherical power (-4.5D).
[0153] The value of an ophthalmic parameter within a subset of ophthalmic parameters that has the greatest influence on at least one geometric parameter of the optimized semi-finished optical lens is called a constrained ophthalmic parameter.
[0154] According to embodiments of this disclosure, the steps of determining a subset of ophthalmic parameters and determining optimized values for at least one geometric parameter are repeated in order to determine an optimized subset of ophthalmic parameters corresponding to the provided desired proportion of selection.
[0155] When the steps of determining a subset of ophthalmic parameters and determining an optimized value for at least one geometric parameter are repeated, the new subset of ophthalmic parameters corresponds to the previously determined subset of ophthalmic parameters, wherein the constrained ophthalmic parameters have been removed from the subset of ophthalmic parameters and replaced by the values of optical parameters that have a minor influence on at least one geometric parameter of the optimized semi-finished optical lens.
[0156] For example, in Figure 4 In addition, the new subset of ophthalmic parameters corresponding to OSF10 can exclude ophthalmic prescriptions with a cylinder power of 0D and a spherical power of -4.5D, and includes ophthalmic prescriptions that exclude a cylinder power of 3D and a spherical power of -3D.
[0157] Those skilled in the art will recognize that technicians determine the constrained ophthalmic parameters based on different subsets of possible ophthalmic parameters.
[0158] When implementing the method disclosed herein, the effective proportion selection rate of the subset of ophthalmic parameters associated with the optimized semi-finished optical lens can be greater than the desired proportion ratio. Therefore, the optimization of the geometric parameters of the semi-finished optical lens can be improved while maintaining an effective proportion selection rate closer to the desired proportion selection rate.
[0159] According to embodiments disclosed herein, after an optimized semi-finished optical lens has been identified, the effective proportion selection rate of the optimized semi-finished optical lens is determined based on the provided order proportion data.
[0160] The effective proportion of selection can be compared with the expected proportion of selection provided.
[0161] The steps of determining a subset of ophthalmic parameters and determining an optimized value for at least one geometric parameter are repeated using a smaller expected proportion selection rate.
[0162] The effective proportion of selection can be further determined and compared with the expected proportion of selection.
[0163] Advantageously, this embodiment allows for the optimization of semi-finished optical lenses while having an effective ratio selection that is as close as possible to the desired ratio selection.
[0164] According to embodiments of this disclosure, the method may include repeating steps S1 to S4 at different desired ratios, wherein in each repetition, the volume difference between the optimized semi-finished optical lens and the initial semi-finished optical lens is determined. The method further includes determining the ratio that provides the maximum volume difference and the optimized semi-finished optical lens.
[0165] like Figure 5 As shown, this disclosure further relates to a data processing device 20, which includes at least:
[0166] - One input terminal 22,
[0167] - One processor 24, and
[0168] - Output terminal 26.
[0169] The data processing device is configured to optimize the geometric parameters of at least one semi-finished optical lens in a set of semi-finished optical lenses having a specified lens material. The semi-finished optical lens to be optimized has a specified base curve and an initially determined geometry, which is determined to allow the manufacture of finished ophthalmic lenses for an initial set of ophthalmic parameters.
[0170] Input device 22 is configured to be used for at least:
[0171] - Obtain order proportion data indicating the proportion of each ophthalmology prescription in the initial set of ophthalmology parameters, and
[0172] - To achieve the desired percentage of selections.
[0173] Processor 24 is configured to at least:
[0174] -Based on order ratio data, determine the subset of ophthalmic parameters included in the initial ophthalmic parameter set that corresponds to the provided expected ratio selection rate, and
[0175] - Determine the optimized value of at least one geometric parameter of an optimized semi-finished optical lens having a specified base curve and lens material, and allow the manufacture of finished ophthalmic lenses for each ophthalmic prescription included in a subset of ophthalmic parameters, wherein the total volume of the optimized semi-finished optical lens is less than the total volume of the semi-finished optical lens to be optimized.
[0176] The data processing apparatus may further include a memory for storing at least instructions, which the processor 24 can access to implement the determining steps of the method disclosed herein.
[0177] Output terminal 26 is configured to output at least one determined optimized value of at least one geometric parameter of the optimized semi-finished optical lens as the optimized geometric parameter of the semi-finished optical lens.
[0178] The data processing device 20 may include an input terminal, a processor, and an output terminal in the same location, such as in the same computing device.
[0179] In another embodiment, processor 24 may reside on a remote server accessible over a network (such as the Internet) via a suitable data link. Thus, the server receives and transmits data over the network with any number of connected computing devices. In addition to the processor, the server may also include memory for storing instructions to enable the processor to perform at least one of the defined steps of the methods disclosed herein.
[0180] The description of the methods in this disclosure also applies to the data processing equipment in this disclosure, particularly relating to the initial set of ophthalmic parameters, subsets of ophthalmic parameters, order ratio data and expected ratio selection rates, geometric parameters, and optimized semi-finished optical lenses.
[0181] The disclosure has been described above with the aid of embodiments without limiting the general inventive concept.
[0182] Many other modifications and variations will be apparent to those skilled in the art when referring to the foregoing illustrative embodiments. These embodiments are given by way of example only and are not intended to limit the scope of this disclosure, which is defined only by the appended claims.
[0183] In the claims, the word "comprising" does not exclude other elements or steps, and the indefinite article "a (a) or (an)" does not exclude a plural. The mere fact that different features are described in mutually different dependent claims does not imply that combinations of these features cannot be used advantageously. No reference numerals in the claims should be construed as limiting the scope of this disclosure.
Claims
1. A method, implemented by a computer device, for optimizing the geometric parameters of at least one semi-finished optical lens in a set of semi-finished optical lenses having a specified lens material. The semi-finished optical lens to be optimized has a specified base curve and an initially determined geometry, the initially determined geometry being configured to allow the manufacture of a finished ophthalmic lens for an initial set of ophthalmic parameters, the method comprising: - Provides order proportion data indicating the proportion of each ophthalmology prescription in the initial set of ophthalmology parameters. - Provides a desired proportion selection rate, wherein the desired proportion selection rate is a predefined numerical target, expressed as a percentage, representing the target proportion of the optimized semi-finished optical lenses from the initial set of ophthalmic parameters that allows for the manufacture of finished lenses. - Based on the order ratio data, determine the subset of ophthalmic parameters included in the initial ophthalmic parameter set that corresponds to the provided expected ratio selection rate. - Determine optimized values for at least one geometric parameter of an optimized semi-finished optical lens having the specified base curve and the specified lens material, and allow for the manufacture of finished ophthalmic lenses for each ophthalmic prescription included in the subset of ophthalmic parameters. - The determined optimized value of at least one geometric parameter of the optimized semi-finished optical lens is output as the optimized geometric parameter of the semi-finished optical lens.
2. The method according to claim 1, wherein, The initial set of ophthalmic parameters and the subset of ophthalmic parameters include a set of discrete values of prescription parameters, and for each prescription parameter, the initial set of ophthalmic parameters includes all discrete values between two extreme values.
3. The method according to claim 2, wherein, The set of discrete values for the prescription parameters has an increment greater than or equal to 0.05 diopters and less than or equal to 0.5 diopters.
4. The method according to claim 2 or 3, wherein, The initial set of ophthalmic parameters includes at least several ophthalmic prescriptions with a cylinder power of less than or equal to 0.1 diopters.
5. The method according to claim 1, wherein, The subset of ophthalmic parameters includes at least a number of ophthalmic prescriptions with a cylinder power of less than or equal to 0.1 diopters.
6. The method according to claim 1, wherein, The subset of ophthalmic parameters corresponds to a uniform scaling of the initial set of ophthalmic parameters in the two-dimensional representation of the ophthalmic prescription parameters.
7. The method according to claim 1, wherein, The geometric parameter is at least one of the following: - The diameter of the semi-finished optical lens, - The thickness at the center of the semi-finished optical lens - The thickness at the periphery of the semi-finished optical lens. - The shape of the rear surface of the semi-finished optical lens.
8. The method according to claim 1, wherein, The desired selection rate is greater than or equal to 50% and less than or equal to 95%.
9. The method according to claim 2, wherein, After determining the subset of ophthalmic parameters corresponding to the provided desired proportion of selection, a minimum subset of ophthalmic parameters is determined.
10. The method according to claim 1, wherein, Repeat the steps of determining a subset of ophthalmic parameters and determining optimized values for at least one geometric parameter in order to determine the subset of ophthalmic parameters that allows the optimized semi-finished optical lens to have a minimum overall volume.
11. The method according to claim 1, wherein, After the optimized semi-finished optical lens has been determined, the effective proportion selection rate of the optimized semi-finished optical lens is determined based on the provided order proportion data. The effective selection ratio is compared with the provided expected selection ratio, and The steps of determining a subset of ophthalmic parameters and determining an optimized value for at least one geometric parameter are repeated using a smaller expected proportion selection rate.
12. A method, implemented by a computer device, for optimizing the geometric parameters of at least one semi-finished optical lens in a set of semi-finished optical lenses having a specified lens material. The semi-finished optical lens to be optimized has a specified base curve and an initially determined geometry, the initially determined geometry being determined to allow the manufacture of finished ophthalmic lenses for an initial set of ophthalmic parameters, wherein the method includes repeating the steps of the method according to claim 1 at different desired ratios of selection, wherein at each repetition, the volume difference between the optimized semi-finished optical lens and the semi-finished optical lens to be optimized is determined, and the method further includes determining the ratio that provides the maximum volume difference and the optimized semi-finished optical lens.
13. A data processing apparatus for optimizing the geometric parameters of at least one semi-finished optical lens in a set of semi-finished optical lenses having a specified lens material. The semi-finished optical lens to be optimized has a specified base curve and an initially determined geometry, the initially determined geometry being configured to allow the manufacture of a finished ophthalmic lens for an initial set of ophthalmic parameters, wherein the device includes: At least one input terminal, said at least one input terminal being configured to: - Obtain order proportion data indicating the proportion of each ophthalmic prescription in the initial set of ophthalmic parameters. - Obtain the desired proportion selection rate, wherein the desired proportion selection rate is a predefined numerical target, expressed as a percentage, representing the target proportion of the optimized semi-finished optical lenses in the initial set of ophthalmic parameters that allows for the manufacture of finished lenses. At least one processor, said at least one processor being configured to: -Based on the order ratio data, determine the subset of ophthalmic parameters included in the initial ophthalmic parameter set that corresponds to the provided expected ratio selection rate. - Determine optimized values for at least one geometric parameter of an optimized semi-finished optical lens, the optimized semi-finished optical lens having a specified base curve and lens material, and allowing the manufacture of finished ophthalmic lenses for each ophthalmic prescription included in the subset of ophthalmic parameters, wherein the total volume of the optimized semi-finished optical lens is smaller than the total volume of the semi-finished optical lens to be optimized. At least one output terminal, said at least one output terminal being configured to: - The determined optimized value of at least one geometric parameter of the optimized semi-finished optical lens is output as the optimized geometric parameter of the semi-finished optical lens.
14. A computer program product comprising one or more stored instruction sequences, the one or more stored instruction sequences being accessible by a processor and, when executed by the processor, causing the processor to perform the steps of the method according to claim 1.
15. A computer-readable storage medium comprising instructions that, when executed by a computer, cause the computer to perform the steps of the method of claim 1.