JP7414447B2 - Eyeglass lens design system, eyeglass lens design method, and eyeglass lens design program - Google Patents

Description

The present disclosure relates to a spectacle lens design system, a spectacle lens design method, and a spectacle lens design program.

Traditionally, a lab management system (hereinafter referred to as "LMS") has been installed in factories that manufacture eyeglass lenses.The LMS receives orders for the manufacture of eyeglass lenses from eyeglass stores, and then processes the factory based on the received order information. The processing equipment and manufacturing process within the machine are controlled and managed (for example, see Patent Document 1).

Additionally, a spectacle lens design vendor provides a lens design system (hereinafter referred to as "LDS") to a spectacle lens manufacturer, and the spectacle lens manufacturer allows the LDS to perform calculations based on prescription data. , designing and manufacturing eyeglass lenses. For example, LDS calculation processing is performed on a web service such as a manufacturing factory server or terminal based on prescription data input from a terminal installed at an eyeglass store, and the LDS calculation processing results are output to the LMS. Ru.

Japanese Patent Application Publication No. 2014-085574

When designing an eyeglass lens whose optical surface includes a progressive surface, the optical surface including the progressive surface is designed based on the initial center thickness of the lens, and the edge thickness is determined based on the shape of the designed optical surface. Calculate. If the calculated edge thickness is less than a predetermined threshold, the center thickness of the lens is reset, an optical surface is designed based on the reset center thickness of the lens, and the edge thickness is calculated. Repeat until the edge thickness reaches the threshold value or more. Therefore, the design of the optical surface including the progressive surface must be repeated many times, and it takes time until the final shape of the eyeglass lens is determined. In particular, when selling face-to-face with customers at an eyeglass store, etc., when answering inquiries about the center thickness and edge thickness of the eyeglass lenses the customer is trying to order, it is necessary to make the customer wait until the shape of the eyeglass lens is determined. This can lead to customer dissatisfaction.

The present disclosure has been made in view of the above-mentioned problems, and aims to provide an eyeglass lens design system that can design the shape of an optical surface at an early stage.

A spectacle lens design system according to the present disclosure is a spectacle lens design system for designing a spectacle lens whose optical surface includes a progressive surface. an appropriate lens thickness information generation unit that generates appropriate lens thickness information such that the thickness of the designed eyeglass lens satisfies predetermined conditions; and a progressive surface based on prescription data and appropriate thickness information. An optical surface calculation unit that calculates an optical surface and generates optical surface information.

A spectacle lens designing method according to the present disclosure is a spectacle lens designing method for designing a spectacle lens whose optical surface includes a progressive surface, and includes a prescription data acquisition step of acquiring prescription data, and designing a lens with the optical surface as a spherical surface. an appropriate lens thickness information generation step for generating appropriate lens thickness information such that the thickness of the designed lens satisfies predetermined conditions, and an optical surface including a progressive surface based on prescription data and appropriate thickness information. an optical surface calculation step of calculating and generating optical surface information.

According to the present invention, it is possible to provide a spectacle lens design system that allows the shape of an optical surface to be designed at an early stage.

FIG. 1 is a block diagram showing the configuration of an eyeglass lens ordering/processing system according to an embodiment of the present disclosure. FIG. 2 is a block diagram showing the hardware configuration of the LDS of the eyeglass lens ordering/processing system shown in FIG. 1. FIG. FIG. 2 is a block diagram showing the configuration of each functional unit of the LDS of the eyeglass lens ordering/processing system shown in FIG. 1. FIG. 2 is a block diagram showing the configuration of an LMS and a processing machine of the eyeglass lens ordering/processing system shown in FIG. 1. FIG. 2 is a flowchart showing an example of the processing operation of the eyeglass lens ordering/processing system shown in FIG. 1. FIG. 3 is a flowchart showing in detail a flow in which the appropriate lens thickness information generation unit generates appropriate lens thickness information and calculates an optical surface.

Hereinafter, a spectacle lens design system according to an embodiment of the present disclosure will be described based on the drawings.
<1. Eyeglass lens ordering and processing system>
The eyeglass lens ordering/processing system 1 will be described below.
FIG. 1 is a block diagram showing the configuration of a spectacle lens ordering and processing system according to an embodiment of the present disclosure. As shown in FIG. 1, the eyeglass lens ordering/processing system 1 includes an eyeglass lens design system (hereinafter also referred to as "LDS") 100, a laboratory management system (hereinafter also referred to as "LMS") 200, and a terminal device 300. and a processing machine 400.

The LDS 100, the LMS 200, and the terminal device 300 are communicably connected via the network 3. LMS 200 and processing machine 400 are connected to each other via a LAN (Local Area Network). Examples of the network 3 include communication networks such as the Internet, intranets, LANs, and telephone lines based on general-purpose protocols such as TCP/IP.

The LDS 100 may be installed within the factory of the eyeglass lens manufacturer, or may be installed outside. The LMS 200 and the processing machine 400 are installed, for example, in a factory of an eyeglass lens manufacturer.

The terminal device 300 is installed at an eyeglass store, for example. The terminal device 300 is composed of a computer having, for example, a CPU, a RAM, and an HDD, and the CPU executes each process using a program recorded on the HDD and using the RAM as a work area. The terminal device 300 receives input of prescription data created by diagnosis of a purchaser of glasses at an eyeglass store or the like from an input interface.

<2. Example of LDS hardware configuration>
The hardware configuration of the LDS 100 will be described below.
FIG. 2 is a block diagram showing the hardware configuration of the LDS of the eyeglass lens ordering and processing system shown in FIG. As shown in FIG. 2, the LDS 100 includes, for example, a computer 60 that controls the operation of the entire LDS 100, an operation display section 71, and an operation input section 72.

The computer 60 includes a CPU 61, a RAM 62, a ROM 63, an HDD 64, an operation section output I/F 65, an operation section input I/F 66, and a network I/F 67.

A CPU (Central Processing Unit) 61 executes various programs. The CPU 61 boots the system based on a boot program stored in a ROM (Read Only Memory) 63. Furthermore, the CPU 61 reads out a control program stored in the HDD (Hard Disk Drive) 64 and executes predetermined processing using a RAM (Random Access Memory) 62 as a work area.

The HDD 64 stores various control programs and processing/lens thickness data. The HDD 64 also stores data acquired from outside the device via the network I/F 67 and calculation results by the control program.

The operation unit output I/F 65 performs data output communication control to the operation display unit 71. The operation unit input I/F 66 performs data input communication control from the operation input unit 72. The network I/F 67 is connected to the network 3 and performs input/output control of information via the network 3. In this way, each component 61-67 is placed on the system bus 68.

The operation display unit 71 is a display interface for the user, which includes a display device such as an LCD (Liquid Crystal Display) or an LED (Light Emitting Diode). The operation input unit 72 is an interface for inputting instructions from the user, and includes input devices such as a touch panel and hard keys.

The LDS 100 can be realized by a computer 60 such as a server computer or a personal computer connected to the operation display section 71 and the operation input section 72.

The CPU 61 reads the control program stored in the HDD 64 into the RAM 62 and executes it, thereby realizing each function of each unit of the LDS 100. Note that in each figure, configurations of portions that are not related to the essence of the present disclosure are omitted and not illustrated.

<3. Configuration example of each functional part of LDS>
Hereinafter, a configuration example of each functional unit of the LDS 100 will be described.
FIG. 3 is a block diagram showing the configuration of each functional unit of the LDS of the eyeglass lens ordering/processing system shown in FIG. 1. Each functional unit shown in FIG. 3 is configured such that the CPU 61 executes a program stored in the ROM 63 or the HDD 64 of the LDS 100, and cooperates with the HDD 64, the operation unit output I/F 65, the operation unit input I/F 66, and the network input I/F. It is realized on the LDS 100 by working. Note that FIG. 3 shows the configuration of functional units particularly relevant to the description of this embodiment.

As shown in FIG. 3, the LDS 100 includes a prescription data acquisition section 110, an actual convex surface/processing characteristic acquisition section 115, a design data generation section 120, a processing data generation section 130, and an inspection reference data generation section 140. , and a data output section 150.
(Prescription data acquisition department)

The prescription data acquisition unit 110 acquires prescription data for spectacle lenses input into the terminal device 300.

The prescription data includes prescription power information such as spherical refractive power (S power), cylindrical power (C power), astigmatic axis direction (AX), and addition power (ADD), product information such as item name, and pupil information. It includes layout information such as PD and eye point, information on the wearing condition, and information on the minimum center thickness/edge thickness.

(Actual convex surface/processing characteristics acquisition section)
The real convex surface/processing characteristic acquisition unit 115 has a real convex surface/processing characteristic database 116. The actual convex surface/processing characteristic database 116 records actual convex surface data of each semi-finished trend lens and processing characteristic data regarding processing characteristics.

The actual convex surface is the actual surface shape of a semi-finished trend lens, and more specifically, it is the actually measured shape of the semi-finished trend lens convex surface, or the model shape of the convex surface statistically derived from the measurement results of the semi-finished trend lens. . This actual convex surface data is used in the inspection data generation process.

Processing characteristics are the shape of the convex surface of the semi-finished trend lens due to the stress generated when the alloy is cooled during the blocking process, which involves bonding a fixing jig to the convex surface of the lens with an alloy (low melting point alloy), which is performed prior to cutting and polishing of the semi-finished trend lens. For example, the amount of machining allowance or machining allowance may vary depending on the polishing method. The machining characteristics are used in a process for generating machining data, which will be described later.

The real convex surface/processing characteristic acquisition unit 115 selects semi-finished lenses to be used based on prescription data.

(Design data generation department)
The design data generation unit 120 generates design data based on prescription data.
The design data generation section 120 includes an initial value calculation section 121, an appropriate lens thickness information generation section 122, an optical surface calculation section 123, and a shape optimization section 124.

(Initial value calculation part)
The initial value calculation unit 121 calculates initial values necessary for performing optical and shape optimization based on prescription data. The initial value includes, for example, the basic distribution of optical performance. Further, the initial value calculation unit 121 derives parameters necessary for optical calculation of the inclination and tilt angle of the lens itself from the layout information and the wearing state information.

(Appropriate lens thickness information generation unit)
The appropriate lens thickness information generation unit 122 designs the optical surface of the spectacle lens as a spherical surface, and generates appropriate lens thickness information such that the edge thickness satisfies a predetermined condition. In this embodiment, the predetermined condition is that the edge thickness is equal to or greater than the minimum edge thickness determined from the frame shape or the like.

(Optical surface calculation section)
The optical surface calculation unit 123 calculates an optical surface including a progressive surface whose edge thickness meets a predetermined condition, taking into account the basic distribution of optical performance determined based on prescription data, the convex shape, the wearing condition of the lens, etc. Convergence calculation is performed to generate optical surface shape data. In this embodiment, the predetermined condition is that the edge thickness is equal to or greater than the minimum edge thickness determined from the frame shape or the like.

(Shape optimization department)
The shape optimization unit 124 optimizes the lens shape derived through optical optimization so that the wall thickness at the center of the lens and the edge thickness at each position of the frame have minimum values. Additionally, the thinning prism is optimized so that there is no extreme difference in edge thickness in the vertical direction.

(Processing data generation section)
The processing data generation unit 130 generates processing data based on the design data.
The processing data is data for forming a finished lens by cutting and polishing the concave surface of the semi-finished lens using a processing machine such as a blocker 410, a CG (Curve Generator) 420, or a polishing machine 430.

(Inspection reference data generation unit)
The inspection reference data generation unit 140 generates data that serves as a reference when the inspection device 450 provided in the processing machine 400 of the LMS 200 inspects the aberrations and the like of the lens (finished product lens) processed based on the processing data. (inspection reference data) is generated.

(Data output section)
The data output unit 150 outputs the data generated by the design data generation unit 120, the processing data generation unit 130, and the inspection reference data generation unit 140 to the LMS 200.

<4. Configuration of LMS and processing machine>
Next, the configurations of LMS 200 and processing machine 400 will be explained. FIG. 4 is a block diagram showing the configuration of the LMS and processing machine of the eyeglass lens ordering and processing system shown in FIG.
Like the LDS, the LMS 200 includes, for example, a computer that controls the operation of the entire LMS, an operation display section, and an operation input section. The computer includes a CPU, RAM, ROM, HDD, an operation unit output I/F, an operation unit input I/F, and a network I/F. Each process by the LMS 200 is realized by the CPU reading and executing a control program stored in the HDD.

As shown in FIG. 4, the processing machine 400 includes a blocker 410, a CG (Curve Generator) 420, a polishing machine 430, a laser machine 440, and an inspection device 450. The operations of these blocker 410, CG 420, polishing machine 430, laser machine 440, and inspection device 450 are controlled by LMS 200. A polishing process is performed in the blocker 410, CG 420, polishing machine 430, and laser machine 440, and an inspection process is performed in the inspection device 450.

(blocker)
The blocker 410 fixes the semi-finished lens to a fixing jig before polishing the lens.

(CG)
CG420 cuts the concave surface of the semi-finished trend lens into a predetermined shape.

(Polishing machine)
The polisher 430 polishes the cut surface to eliminate the steps of machining marks formed on the optical surface of the lens by the CG 420, and further polishes the lens until it becomes a mirror surface.

(laser machine)
Laser machine 440 forms an inscription on the optical surface of the lens.

(Inspection equipment)
The inspection device 450 inspects the aberrations of the finished lens based on the aberration inspection data generated by the LDS 100.

<5. Processing flow for ordering and processing eyeglass lenses>
The processing operation flow of the eyeglass lens ordering and processing system 1 will be described below.
FIG. 5 is a flowchart showing an example of the processing operation of the eyeglass lens ordering/processing system shown in FIG.

(Receiving input of prescription data)
First, the terminal device 300 receives input of prescription data through an input interface and receives an order (S110). The prescription data includes prescription power information such as spherical refractive power (S power), astigmatic power (C power), astigmatic axis direction (AX), and addition power (ADD), product information such as item name, and pupil information. It includes layout information such as PD and eye point, information on the wearing condition, and information on the minimum center thickness/edge thickness.

(Prescription data acquisition)
The prescription data acquisition unit 110 of the LDS 100 acquires prescription data for spectacle lenses (S120: prescription data acquisition step). Then, the semi-finished lenses to be used are selected based on the prescription data.

(Actual convex surface/processing characteristics acquisition)
The real convex surface/processing characteristic acquisition unit 115 refers to the real convex surface/processing characteristic database 116, selects a semi-finished trend lens based on the prescription data, and acquires the real convex surface and processing characteristic data of the selected semi-finished trend lens (S130). .

(Design data generation)
The design data generation unit 120 generates design data based on the prescription data (S140).
The design data is lens surface shape data generated based on prescription data, and includes initial value calculation (S150), appropriate lens thickness information generation (S160), optical surface calculation (S170), and shape optimization. It is generated by performing calculation (S180).

(Initial value calculation)
Next, the initial value calculation unit 121 calculates initial values necessary for performing optical and shape optimization based on the prescription data (S142). That is, the initial value calculation unit 121 derives parameters necessary for optical calculation of the inclination and tilt angle of the lens itself from the layout information and the wearing state information. If the necessary information is not available at the time of prescription data acquisition, a predefined default value is used as an alternative. The layout information is information for aligning the optical center of the spectacle lens with the position of the wearer's pupil, and indicates the position of the fitting point with respect to the geometric center of the frame (frame center). Note that this initial value includes the base curve. Furthermore, the initial value calculation unit 121 determines the basic distribution of optical performance from the item information and prescription power.

(Generation of appropriate lens thickness information)
Next, the appropriate lens thickness information generation unit 122 designs an optical surface as a spherical surface and generates appropriate lens thickness information that satisfies a predetermined condition. FIG. 6 is a flowchart showing in detail the flow in which the appropriate lens thickness information generation section generates appropriate lens thickness information and calculates the optical surface.
As shown in FIG. 6, in step S160 of generating appropriate lens thickness information, first, the appropriate lens thickness information generation unit 122 sets initial values of the center thickness and edge thickness of the eyeglass lens (S161). For example, the minimum center thickness and minimum edge thickness values (specified values) included in the prescription data may be used as the initial values of the spectacle lens. Furthermore, if the minimum center thickness and minimum edge thickness are not set, the prescribed values may be used. In addition, when the value of the base curve is large, it is preferable to use a prescribed value or a value obtained by multiplying the minimum center thickness by the following coefficient as the value of the center thickness used as the initial value. This coefficient becomes larger as the base curve becomes larger. Note that in this embodiment, the coefficients are integrated, but the present invention is not limited to this, and the coefficients may be applied to the specified value or the minimum center thickness so that the initial value of the center thickness becomes larger as the base curve becomes larger. Bye.

Next, the appropriate lens thickness information generation unit 122 generates prescription data (S power, C power, Ax, prism value, prism direction, refractive index, base curve, processing diameter, etc.) and the set central thickness of the eyeglass lens. Based on the minimum edge thickness and assuming that the optical surface of the lens is a spherical surface, a temporary optical surface is designed (S162: first optical surface design step). At this time, since the calculation is performed assuming that the optical surface of the lens is a spherical surface, it can be performed in a shorter time than when calculating an optical surface including a progressive surface.
Next, the edge thickness is calculated based on the temporary optical surface designed in this way (S163: first edge thickness determination step).

Next, it is determined whether the edge thickness calculated in this manner and the value of center wall thickness + edge thickness satisfy a predetermined condition (S164: first determination step). In this embodiment, (1) the edge thickness calculated based on the temporary optical surface is larger than a predetermined threshold value (in this embodiment, the minimum edge thickness included in the prescription data), and (2) the center thickness is The predetermined condition is that the calculated total edge thickness is greater than the sum of the minimum center wall thickness and the minimum edge thickness.

Next, if the thickness does not meet the predetermined condition in the first determination step (NO in S164), the center thickness is reset. As a method for resetting the center wall thickness, for example, a predetermined value may be added to the previously set value. Then, the first optical surface design step (S162), the first edge thickness calculation step (S163), and the first determination step (S164) are repeated.

If the thickness satisfies a predetermined condition in the first determination step (S164: YES), the center thickness and edge thickness that satisfy the predetermined condition are set as appropriate lens thickness information.

Next, the optical surface calculation unit 123 calculates an optical surface including a progressive surface based on the prescription data (initial value) and appropriate thickness information, and generates optical surface information (S170: optical surface calculation step). In the optical surface calculation step S170, the optical surface calculation unit 123 first calculates an optical surface including a progressive surface based on the center thickness of the appropriate lens thickness information and the basic distribution of optical performance (S171: second optical surface design step).
Next, the optical surface calculation unit 123 calculates the edge thickness based on the optical surface designed in this way (S172: second edge thickness determination step).

Next, it is determined whether the edge thickness calculated in this way and the value of center wall thickness + edge thickness satisfy a predetermined condition (S173: second determination step). In this embodiment, (1) the edge thickness calculated based on the temporary optical surface is larger than a predetermined threshold value (in this embodiment, the minimum edge thickness included in the prescription data), and (2) the center thickness is The predetermined condition is that the calculated total edge thickness is greater than the sum of the minimum center wall thickness and the minimum edge thickness.

If the thickness does not satisfy the predetermined condition in the second determination step (NO in S173), the center thickness of the appropriate lens thickness information is reset. As a method for resetting the center wall thickness, for example, a predetermined value may be added to the previously set value. Then, the second optical surface design step (S171), the second edge thickness calculation step (S172), and the second determination step (S173) are repeated.

(shape optimization calculation)
If the thickness does not meet the predetermined condition in the second determination step (NO in S173), the shape optimization unit 124 of the design data generation unit 120 optimizes the optical surface (S180). . Additionally, the thinning prism is optimized so that there is no extreme difference in edge thickness in the vertical direction.

(Processing data generation)
The processing data generation unit 130 generates processing data (S190). The processing data includes processing information and correction design data for processing.
The correction design data for processing is data for having the processing machine 400 cut and polish the concave surface of the semi-finished lens to form a finished lens. Specifically, the correction design data is used to make corrections that reflect the processing characteristics of the lens in the design data. This is the added data.

When processing semi-finished lenses, if the shape of the convex surface of the semi-finished lenses changes due to the processing characteristics of the lens, a deviation will occur in the power of the lens, so we design a correction to offset the deviation based on the processing characteristics data. In addition to the data, this is used as data for processing.
A manufacturer of eyeglass lenses cuts and polishes the concave surface of a semi-finished lens based on processing data to form a finished lens.

(Generation of standard data for inspection)
The inspection reference data generation unit 140 serves as a reference when the inspection device 450 provided in the processing machine 400 inspects the optical performance such as aberration of the processed lens (finished product lens) based on the processing data. Data (inspection reference data) is generated (S200).
The inspection reference data is data that serves as a reference when inspecting the aberration of the optical surface shape of a finished product lens, and is data that is generated separately from the design data and processing data. Specifically, this is data that reflects the actual shape of the semi-finished trend lens in the design data.

The actual shape is the actually measured shape of the convex surface of the semi-finished trend lens, or the model shape of the convex surface statistically derived from the measurement results of the semi-finished trend lens.
When semi-finished lenses are manufactured, manufacturing errors due to polymerization shrinkage always occur during cast manufacturing, so finished lenses are never manufactured according to design data. Further, as described above, the processing data is the design data plus corrections that reflect the processing characteristics, so the finished lens will not be manufactured according to the design data. Therefore, if design data or processing data are used as reference data for inspection of finished product lenses, accurate comparisons cannot be made. Therefore, in order to achieve accurate comparison, data is generated in which the actual shape of the semi-finished trend lens is reflected in the design data, and this data is used as inspection data.

(Output of design data)
The data output unit 150 outputs the design data to the LMS 200 (S210).

(Output of processing data)
The data output unit 150 outputs processing data to the LMS 200 (S220).

(Output of reference data for inspection)
The data output unit 150 outputs the inspection reference data to the LMS 200 (S230).

(Cutting and polishing of semi-finished lenses)
The LDS 100 outputs the processing data of the semi-finished trend lens stored in the calculation result output file and the processing surface data file to the LMS 200, and the LMS 200 transmits the processing data to the CG 420 of the processing machine 400 and the polishing machine 430. The CG 420 and the polishing machine 430 cut and polish the semi-finished trend lens based on the processing data (S240). Further, a laser machine 440 forms a mark on the optical surface of the lens. We also perform processing such as dyeing, hard coating, production of functional films, and processing to match the shape of the frame.

(inspection)
The inspection device 450 measures the optical performance of the finished lens and compares it with the inspection reference data received by the LMS 200 to inspect the manufacturing accuracy of the finished lens (S250). If the finished lens has a predetermined manufacturing accuracy, the process ends.

According to this embodiment, the following effects are achieved.
In this embodiment, the appropriate lens thickness information generation unit 122 designs an eyeglass lens using a spherical optical surface and generates appropriate lens thickness information, and the optical surface calculation unit 123 uses prescription data and this appropriate lens thickness information. Based on this, calculate the optical surface including the progressive surface. Therefore, the number of calculations for optical surfaces including progressive surfaces that require complicated calculations can be reduced, and the shape of the optical surfaces can be designed at an early stage.

In the present embodiment, the appropriate lens thickness information generation unit 122 also sets the center thickness (S161, S165), designs the optical surface as a spherical surface (S162), calculates the edge thickness (S163), and calculates the edge thickness. Appropriate lens thickness information is generated by repeatedly determining whether a predetermined condition is satisfied (S164). This makes it possible to reliably generate appropriate lens thickness information when the optical surface is a spherical surface.

Further, in the present embodiment, in the center thickness setting step (S161), the center thickness of the eyeglass lens is set by multiplying the center thickness of the eyeglass lens by a coefficient according to the base curve. This makes it possible to reduce the number of times the optical surface is designed as a spherical surface.

Further, in the present embodiment, the optical surface calculation unit 123 repeatedly designs an optical surface including a progressive surface (S171), calculates the edge thickness (S172), and resets the center thickness (S174) to calculate the optical surface. Calculation is in progress (S170). As described above, in this embodiment, since the optical surface is calculated based on the appropriate lens thickness information obtained by designing the optical surface as a spherical surface, the number of times this process is repeated can be reduced.

The spectacle lens design system and method of this embodiment will be summarized.
As shown in FIG. 3, the spectacle lens design system (LDS) 100 of this embodiment is a spectacle lens design system for designing a spectacle lens whose optical surface includes a progressive surface. an acquisition unit 110; an appropriate lens thickness information generation unit 122 that designs an eyeglass lens using a spherical optical surface and generates appropriate lens thickness information such that the thickness of the designed eyeglass lens satisfies a predetermined condition; The apparatus includes an optical surface calculation unit 123 that calculates an optical surface including a progressive surface based on prescription data and appropriate thickness information and generates optical surface information.

As shown in FIG. 5, the spectacle lens designing method of this embodiment is a spectacle lens designing method for designing a spectacle lens whose optical surface includes a progressive surface, and includes a prescription data acquisition step (S120) of acquiring prescription data. ), an appropriate lens thickness information generation step (S160) for designing a lens with the optical surface as a spherical surface and generating appropriate lens thickness information such that the thickness of the designed lens satisfies predetermined conditions; and prescription data. and an optical surface calculation step (S170) of calculating an optical surface including a progressive surface and generating optical surface information based on the appropriate thickness information.

1 Processing system 3 Network 60 Computer 61 CPU
62 RAM
63 ROM
64 HDD
65 Operation unit output I/F
66 Operation unit input I/F
67 Network I/F
68 System bus 71 Operation display section 72 Operation input section 110 Prescription data acquisition section 115 Machining characteristic acquisition section 116 Machining characteristic database 120 Design data generation section 121 Initial value calculation section 122 Information generation section 123 Optical surface calculation section 124 Shape optimization section 130 Processing data generation unit 140 Inspection reference data generation unit 150 Data output unit 300 Terminal device 400 Processing machine 410 Blocker 430 Polishing machine 440 Laser machine 450 Inspection device

Claims (7)

A spectacle lens design system for designing a spectacle lens whose optical surface includes a progressive surface, the system comprising:
a prescription data acquisition unit that acquires prescription data;
an appropriate lens thickness information generation unit that designs an eyeglass lens with an optical surface as a spherical surface and generates appropriate lens thickness information such that the thickness of the designed eyeglass lens satisfies a predetermined condition;
an optical surface calculation unit that calculates an optical surface including a progressive surface based on the prescription data and the appropriate lens thickness information and generates optical surface information;
Equipped with
The appropriate lens thickness information generation unit includes:
a center thickness setting step of setting an initial value of the center thickness of the eyeglass lens;
a first optical surface design step of designing an optical surface as a spherical surface based on the set center thickness;
a first edge thickness calculation step of calculating an edge thickness based on the designed optical surface;
a first determination step of determining whether the calculated edge thickness satisfies a predetermined condition;
In the first determination step, if it is determined that the calculated edge thickness does not satisfy the predetermined condition, resetting the center thickness of the eyeglass lens and performing the first optical surface designing step; repeating the first edge thickness calculation step and the first determination step;
The appropriate lens thickness information includes a center thickness when it is determined in the first determination step that the calculated edge thickness satisfies a predetermined condition;
The optical surface information includes information regarding the shape of an optical surface including a progressive surface, which is calculated based on the prescription data and the appropriate lens thickness information.
Eyeglass lens design system. In the center wall thickness setting step,
setting an initial value of the center thickness of the specified eyeglass lens by applying a coefficient according to the base curve to the designated value of the center thickness of the specified eyeglass lens;
The eyeglass lens design system according to claim 1 . The optical surface calculation section is
a second optical surface designing step of designing an optical surface including a progressive surface based on the appropriate lens thickness information;
a second edge thickness calculation step of calculating an edge thickness based on the designed progressive surface;
a second determination step of determining whether the calculated edge thickness satisfies a predetermined condition;
In the second determination step, if it is determined that the calculated edge thickness does not satisfy the predetermined condition, the center thickness of the appropriate lens thickness information is reset and the second optical surface design is performed. step, the second edge thickness calculation step, and the second determination step,
The optical surface information includes information regarding the optical surface when it is determined in the second determination step that the calculated edge thickness satisfies a predetermined condition.
The eyeglass lens design system according to claim 1 or 2. A spectacle lens design system for designing a spectacle lens whose optical surface includes a progressive surface, the system comprising:
a prescription data acquisition unit that acquires prescription data;
an appropriate lens thickness information generation unit that designs an eyeglass lens with an optical surface as a spherical surface and generates appropriate lens thickness information such that the thickness of the designed eyeglass lens satisfies a predetermined condition;
an optical surface calculation unit that calculates an optical surface including a progressive surface based on the prescription data and the appropriate lens thickness information and generates optical surface information;
Equipped with
The optical surface calculation section is
a second optical surface designing step of designing an optical surface including a progressive surface based on the appropriate lens thickness information;
a second edge thickness calculation step of calculating an edge thickness based on the designed progressive surface;
a second determination step of determining whether the calculated edge thickness satisfies a predetermined condition;
In the second determination step, if it is determined that the calculated edge thickness does not satisfy the predetermined condition, the center thickness of the appropriate lens thickness information is reset and the second optical surface design is performed. step, the second edge thickness calculation step, and the second determination step,
The optical surface information includes information regarding the optical surface when it is determined in the second determination step that the calculated edge thickness satisfies a predetermined condition .
Eyeglass lens design system. A spectacle lens design method for designing a spectacle lens whose optical surface includes a progressive surface, the method comprising:
a prescription data acquisition step of acquiring prescription data;
an appropriate lens thickness information generation step of designing a lens with an optical surface as a spherical surface and generating appropriate lens thickness information such that the thickness of the designed lens satisfies a predetermined condition;
an optical surface calculation step of calculating an optical surface including a progressive surface based on the prescription data and the appropriate lens thickness information and generating optical surface information;
Equipped with
In the appropriate lens thickness information generation step,
a center thickness setting step of setting an initial value of the center thickness of the eyeglass lens;
a first optical surface design step of designing an optical surface as a spherical surface based on the set center thickness;
a first edge thickness calculation step of calculating an edge thickness based on the designed optical surface;
a first determination step of determining whether the calculated edge thickness satisfies a predetermined condition;
In the first determination step, if it is determined that the calculated edge thickness does not satisfy the predetermined condition, resetting the center thickness of the eyeglass lens and performing the first optical surface designing step; repeating the first edge thickness calculation step and the first determination step;
The appropriate lens thickness information includes a center thickness when it is determined in the first determination step that the calculated edge thickness satisfies a predetermined condition;
The optical surface information includes information regarding the shape of an optical surface including a progressive surface, which is calculated based on the prescription data and the appropriate lens thickness information.
How to design eyeglass lenses. A spectacle lens design method for designing a spectacle lens whose optical surface includes a progressive surface, the method comprising:
a prescription data acquisition step of acquiring prescription data;
an appropriate lens thickness information generation step of designing a lens with an optical surface as a spherical surface and generating appropriate lens thickness information such that the thickness of the designed lens satisfies a predetermined condition;
an optical surface calculation step of calculating an optical surface including a progressive surface based on the prescription data and the appropriate lens thickness information and generating optical surface information;
Equipped with
In the optical surface calculation step,
a second optical surface designing step of designing an optical surface including a progressive surface based on the appropriate lens thickness information;
a second edge thickness calculation step of calculating an edge thickness based on the designed progressive surface;
a second determination step of determining whether the calculated edge thickness satisfies a predetermined condition;
In the second determination step, if it is determined that the calculated edge thickness does not satisfy the predetermined condition, the center thickness of the appropriate lens thickness information is reset and the second optical surface design is performed. step, the second edge thickness calculation step, and the second determination step,
The optical surface information includes information regarding the optical surface when it is determined in the second determination step that the calculated edge thickness satisfies a predetermined condition.
How to design eyeglass lenses. to the computer,
An eyeglass lens design program that executes the eyeglass lens design method according to claim 5 or 6 .

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