Spectacle lens and lens blanks

Abstract

To provide a method of manufacturing a spectacle lens from lens blanks using marking technique requiring less time and labor with laser.SOLUTION: The method of manufacturing a spectacle lens from a lens material includes: a marking step (step S10) of marking an identification mark 35 for identifying the spectacle lens, and a processing information mark including a tray identification 2D code 33a used for processing the lens blanks, a tray identification code 33b, a shape line 3 and a position mark 34 on a convex surface of the lens material by forming holes or grooves using laser; and a concave surface cutting step (step S13) of reading the processing information mark and cutting the concave surface of the lens blanks on the basis of the processing information mark that is read.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present disclosure relates to a method and system for manufacturing a spectacle lens by polishing a lens material to manufacture a spectacle lens, and a spectacle lens. [Background technology]

[0002] Patent Document 1 (JP Patent Publication 2006-53227 A) discloses a method for manufacturing eyeglass lenses from lens blanks using laser marking technology. In this method, first, the convex surface of the lens blank is cut and polished, and a reference mark that will serve as a reference for alignment in a later processing step is laser marked on the cut and polished convex surface. Then, alignment and the like are performed based on this reference mark, and cutting and polishing are performed on the concave surface. After cutting and polishing on both sides are completed, the lens blank is dyed, hard-coated, and coated with an anti-reflective film, etc.

[0003] Then, the spectacle lenses manufactured in this manner are marked with a mark called a hidden mark (or an engraving mark). For example, for a progressive power spectacle lens, the hidden mark includes a reference mark for identifying the fitting point position on the lens surface, an abbreviation indicating the addition power, and a management code for identifying the spectacle lens, as described in Patent Document 2 (JP Patent Publication 2000-284234). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2006-53227 A [Patent Document 2] JP 2000-284234 A Summary of the Invention [Problem to be solved by the invention]

[0005] In the method described in Patent Document 1, marking is performed twice: once after cutting and polishing the convex surface, and once after dyeing, hard coating, and applying an anti-reflective coating. This causes problems in that the manufacturing process is time-consuming and the maintenance cost of the laser irradiation device is high.

[0006] One embodiment of the present invention has been made in consideration of the above problems, and its object is to provide a method for manufacturing eyeglass lenses from lens blanks using laser marking technology that does not require much effort or cost for manufacturing. [Means for solving the problem]

[0007] A manufacturing method for eyeglass lenses according to one embodiment of the present invention is a method for manufacturing eyeglass lenses from lens material, and includes a marking process for marking an identification information mark for identifying the eyeglass lens and a processing information mark used in processing the lens material by forming a hole or groove on a convex surface of the lens material using a laser, and a concave surface cutting process for reading the processing information marks and cutting the concave surface of the lens material based on the read processing information marks.

[0008] A spectacle lens manufacturing system according to one embodiment of the present invention is a system for manufacturing spectacle lenses from lens material, and includes a design information database in which identification information marks for identifying spectacle lenses and prescription information for the spectacle lenses are recorded in correspondence with each other, a marking device that marks the identification information marks for identifying the spectacle lenses and processing information marks used in processing the lens material by forming holes or grooves on the convex surface of the lens material using a laser, and a concave cutting device that reads the processing information marks and cuts the concave surface of the lens material based on the read processing information marks.

[0009] According to the above configuration, since the identification information mark and the processing information mark are marked in one step before the concave surface cutting step, the labor of laser marking can be reduced. In addition, since the marking of the processing information mark and the marking of the identification information mark can be performed together, they can be performed using one laser irradiation device, and therefore the maintenance cost of the laser irradiation device can be reduced.

[0010] Moreover, the eyeglass lens of one embodiment of the present invention is a eyeglass lens obtained by cutting the concave surface of a lens material, and an identification information mark for identifying the eyeglass lens and a processing information mark used when processing the lens material are marked by holes or grooves on the convex surface, and the diameter of the hole or the width of the groove is less than 70 μm, and the depth of the hole or groove is 0.1 μm or more and 3 μm or less. Effect of the Invention

[0011] According to the above-described embodiment, a method for manufacturing eyeglass lenses from lens blanks using laser marking technology that does not require much labor or cost for manufacturing is provided. [Brief description of the drawings]

[0012] [Figure 1] 1 is a schematic diagram showing an embodiment of a spectacle lens manufacturing system of the present invention. [Diagram 2] FIG. 2 shows markings applied to a lens blank. [Diagram 3] 3 is an enlarged view of the identification mark in FIG. 2. [Figure 4] 1 is a flowchart showing the flow from receiving an order to delivery of a product. [Diagram 5] FIG. 2 shows the convex surface of a lens blank. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Hereinafter, an embodiment of a method and system for manufacturing eyeglass lenses by polishing lens material according to the present invention will be described in detail with reference to the drawings. In this embodiment, a case of manufacturing a plastic progressive power eyeglass lens will be described as an example.

[0014] Fig. 1 is a schematic diagram showing an embodiment of the eyeglass lens manufacturing system of the present invention. As shown in Fig. 1, the eyeglass lens manufacturing system 1 of this embodiment includes an order terminal 101, an eyeglass lens design device 201, a design information database 202, control terminals 210, 220, 230, 240, 250, 270 connected to each processing device, a display terminal 260, reading devices 213, 223, 233, 243, 253, 263, 273 connected to each control terminal 210, 220, 230, 240, 250, 270 and the display terminal 260, a user terminal 301, and a support terminal 302, which are communicatively connected via a network 300 such as the Internet.

[0015] The ordering terminal 101 is, for example, a personal computer installed in the eyeglass store 100. The ordering terminal 101 includes a display unit, an input unit, a communication control unit, and the like. The display unit displays a guide screen that supports input of prescription information for the eye to be examined (prescription information for eyeglass lenses) required when ordering eyeglass lenses. The input unit is for inputting eyeglass prescription data including prescription information for the eye to be examined and specification information for eyeglass frames according to the guide screen. The communication control unit controls data communication with the eyeglass lens design device 201 via the network 300. The communication control unit transmits, to the eyeglass lens design device 201, user information such as customer identification information and store identification information, and the input eyeglass prescription data accepted, in association with lens identification information unique to the eyeglass lenses. A frame shape measuring device 102 is connected to the ordering terminal 101.

[0016] The eyeglass lens design device 201 is installed in a factory 200, and includes a storage unit, a calculation control unit, a communication unit, etc. The storage unit stores a design program, a processing data generation program, etc. The design program is a program that causes the calculation control unit to acquire prescription information for a pair of left and right eyes to be examined, and creates design data for each eyeglass lens (design processing) based on the acquired prescription information. The processing data generation program is a program that causes the calculation control unit to generate processing data that is required when the lens processing device actually processes lenses, based on the design data created by the design program.

[0017] The arithmetic and control unit executes the design program to execute the above-mentioned design processing and generate design data. The arithmetic and control unit also executes the processing data generation program to generate processing data as control information for the lens processing device. The communication unit stores the user information and the eyeglass lens prescription information including eyeglass prescription data, design data, and processing data in the design information database 202 in association with the lens identification information.

[0018] The control terminals 210, 220, 230, 240, 250, 270 are installed in the factory 200 and can obtain processing data corresponding to the tray identification code or lens identification information by referring to the design information database 202. Each of the control terminals 210, 220, 230, 240, 250, 270 includes a storage unit, an equipment control unit, a communication unit, and the like. The storage unit stores an identification information reading program and an equipment control program. The identification information reading program is a program that executes reading of the tray identification code or lens identification information from the tray identification code or identification information mark displayed on the lens blank or the tray (work instruction sheet) by the reading device 213, 223, 233, 243, 253, 273. The equipment control program is a program that acquires processing data corresponding to the processing equipment connected via the communication unit based on the read tray identification code or lens identification information, and controls the processing equipment based on the processing data. The equipment control unit executes the identification information reading program to read the tray identification code or lens identification information. Furthermore, the device control section executes the device control program to obtain processing data corresponding to the tray identification code or the lens identification information via the communication section, and controls the processing device based on the processing data.

[0019] A curve generator 211 and a sand grinder 212 are connected to the control terminal 210 as processing devices. A lens meter 221 and inspection devices such as a wall thickness meter 222 are connected to the control terminal 220 as processing devices. A laser marking device 231 and an image processing device 232 are connected to the control terminal 230 as processing devices. A lens grinding device 241 controlled by NC (Numerical Control) and a chuck interlock 242, which are made of a machining center, are connected to the control terminal 240 as processing devices. A shape measuring device 251 for the bevel apex is connected to the control terminal 250 as processing devices. A printer 271 is connected to the control terminal 270 as processing devices.

[0020] The display terminal 260 is installed in the factory 200, and can obtain processing data corresponding to the tray identification code or lens identification information by referring to the design information database 202. Each display terminal 260 includes a storage unit, a display control unit, a communication unit, and the like. The storage unit stores an identification information reading program and a display control program. The identification information reading program is a program that executes reading of the tray identification code or lens identification information from the tray identification code or identification information mark displayed on the lens blank or the tray (the work instruction sheet transported together with the tray) by the reading device 263. The display control program is a program for obtaining processing data corresponding to the tray identification code or lens identification information via the communication unit based on the read tray identification code or lens identification information, and displaying the processing data. The display control unit reads the tray identification code or lens identification information by executing the identification information reading program. Moreover, the device control unit executes the display control program to obtain processing data corresponding to the tray identification code or lens identification information via the communication unit, and display the processing data.

[0021] The user terminal 301 has an input unit, a display unit, and a communication unit. The input unit is, for example, a keyboard, and accepts input of lens identification information. The communication unit refers to the design information database 202 via the network 300 and acquires prescription information for eyeglass lenses corresponding to the lens identification information. The display unit can display the received eyeglass lens prescription information, etc.

[0022] The support terminal 302 has an input unit, a display unit, and a communication unit. The input unit is, for example, a keyboard, and accepts input of lens identification information. The communication unit refers to the design information database 202 via the network 300 and acquires eyeglass lens prescription information corresponding to the lens identification information. The display unit can display the received eyeglass lens prescription information, etc.

[0023] Next, the markings applied to the lens blanks in this embodiment will be described. The lens blanks 10 are laser marked in a marking step (step S10) described below. Fig. 2 is a diagram showing the markings applied to the lens blanks. As shown in the figure, the lens blanks 10 are marked with a processing information mark used in lens processing, a progressive power information mark related to a progressive power lens, and an identification information mark for identifying the eyeglass lens.

[0024] The processing information marks include a tray identification 2D code 33a, a tray identification code 33b, a shape line 3, and a position mark 34.

[0025] In the manufacturing process of eyeglass lenses described later, the lens blanks 10 are placed in a tray and transported. The tray identification code 33b is an identification number for identifying the tray. The tray identification 2D code 33a is a two-dimensional code such as a data matrix or a QR code (registered trademark) that indicates the tray identification code.

[0026] Shape line 3 is a line indicating a shape region that is 5 to 10% larger than the lens shape when it is fitted into the eyeglass frame. Even if there is a defect in various inspections described later, if the defect is outside this shape line 3, it can be determined that it will not affect the performance of the eyeglass lens.

[0027] The position marks 34 indicate the center (frame center, boxing center) of the eyeglass lens when it is set in the eyeglass frame. The top and bottom position marks 34 are inverted T shapes, and the left and right position marks 34 are arrows. This makes it possible to determine whether the eyeglass lens is for the left or right, and the top and bottom of the lens.

[0028] The progressive power information marks include alignment reference marks 31a and 32a of the progressive power lens, and applied power display marks 31b and 32b, which are applied power or its abbreviation. These alignment reference marks 31a and 32a and applied power display marks 31b and 32b are specified to be displayed on progressive power eyeglass lenses by, for example, JIS7315.

[0029] The identification information mark includes an identification mark 35 indicating lens identification information. FIG. 3 is an enlarged view of the identification mark in FIG. 2. As shown in the figure, the identification mark 35 has an identification number 35A written in the horizontal direction and a pair of arcuate portions 35B displayed on both sides of the identification number 35A. The identification number 35A is a unique number given to each eyeglass lens and corresponds to the lens identification information. When automatic authentication using OCR is performed, it is desirable to write the identification number 35A in OCRB font.

[0030] The progressive power information mark and the identification information mark are marked inside the shape line 3, while the tray identification 2D code 33a and the tray identification code 33b of the processing information mark and the position mark 34 are marked outside the shape line 3.

[0031] The markings on these lens blanks are made by laser marking. In laser marking, dots (holes) are continuously formed by irradiating a laser with pulses from a laser irradiation device. When marking with a laser irradiation device, dots may be formed at a predetermined interval, or the interval between pulses may be narrowed to continuously form dots to form grooves.

[0032] Here, if the dot diameter is large, each mark becomes large and conspicuous, impairing the aesthetics and ease of use of the eyeglass lens. Therefore, the diameter of the dot or the width of the groove formed by the laser is preferably less than 70 μm, more preferably 5 to 30 μm. In addition, the depth of the hole or groove formed by the laser is preferably 0.1 μm to 3 μm. With such dimensions of the dot or groove, each mark can be seen even after dyeing, hard coating, AR coating, etc. are performed.

[0033] Previously, marking on lenses was done using CO 2 However, CO 2 It was not possible to form dots or grooves of the above dimensions using a laser. Therefore, in order to select laser conditions that would enable the formation of dots or grooves of such dimensions, the inventors performed laser marking on lenses with pulsed laser pulse widths of the nanosecond order, picosecond order, and femtosecond order, and laser wavelengths of 1064 nm, 532 nm, 355 nm, 266 nm, and 193 nm. As a result, it was found that it is desirable to perform laser marking under the following conditions.

[0034] When the pulse width is on the order of nanometers (10 -9 More than 10 seconds -6 In the case of a pulse width of less than 10 seconds, the laser passes through the lens when the wavelength is 1064 nm or 532 nm. In contrast, when the wavelength is 355 nm, marking is possible, although there is some thermal effect. When the wavelength is 266 nm or 193 nm, good marking is possible. Therefore, when the pulse width is on the nano order (10 -9 More than 10 seconds -6 In the case of a pulse width of less than 100 s, the wavelength is preferably 355 nm or less, and more preferably 266 nm or less.

[0035] When the pulse width is in the pico-order (10 -12 More than 10 seconds -9In the case of a pulse width of less than 10 seconds, it was possible to mark cracks and other areas that were significantly affected by heat when the wavelength was 1064 nm. -12 More than 10 seconds -10 Good marking was possible if the pulse width was less than 10 s. Also, good marking was possible if the wavelength was 532 nm or 355 nm. Therefore, in the case of a pulse width of pico-order (10 -12 More than 10 seconds -9 In the case of a pulse width of less than 1 second, the wavelength is preferably 1064 nm or less, and more preferably 532 nm or less.

[0036] When the pulse width is on the femto order (10 -15 More than 10 seconds -12 In the case of a pulse width of less than 10 seconds, marking was possible with a wavelength of 1064 nm, although there was a thermal effect. Also, good marking was possible with wavelengths of 532 nm and 355 nm. Therefore, when the pulse width was on the femto order (10 -15 More than 10 seconds -12 In the case of a pulse width of less than 1 second, the wavelength is preferably 1064 nm or less, and more preferably 532 nm or less.

[0037] Next, the flow from receiving an order to delivery of a product will be described. Figure 4 is a flowchart showing the flow from receiving an order to delivery of a product. First, an input screen is displayed on the display of the ordering terminal 101 in the eyeglass store 100. A salesperson or the like follows the instructions on the input screen to input eyeglass prescription data including prescription information for the customer's eye to be examined and eyeglass frame specification information such as eyeglass frame shape data measured by the frame shape measuring instrument 102 or the like, and places an order (step S1).

[0038] The specification information of the eyeglass frame includes the bevel type, bevel position, three-dimensional frame shape information, type of anti-reflection film, type of lens color, product code for identifying the type of eyeglass lens, etc. The prescription information of the examined eye includes the spherical refractive power, cylindrical refractive power, astigmatism axis, addition power, interpupillary distance, naked eye visual acuity, etc. of the customer's left and right eyes. The input specification information of the eyeglass frame and prescription information of the examined eye are transferred online to the eyeglass lens design device 201 of the factory 200 via the network 300 together with lens identification information such as customer identification information and store identification information (step S2).

[0039] The eyeglass lens design device 201 calculates design data for each eyeglass lens and processing data to be used in the lens processing device based on the specification information of the eyeglass frame and the prescription information of the eye to be examined (step S3). The eyeglass lens design data includes information on the concave and convex shapes of the eyeglass lens and the shape of the eyeglass frame.

[0040] The processed data includes at least the following information: -Type and mounting angle of lens holder attached to lens blank (lens blocking processing data) - Data for the processing machine regarding the curve and thickness for grinding and polishing the lens (grinding and polishing processing data) - Prescription values ​​and standard value information (inspection processing data) to be compared with measured values ​​in optical inspections (aberration, degree and thickness) after polishing Marking information to be laser marked on lens blanks, including processing information mark, progressive power information mark, and identification information mark (processing data for laser marking) Color type when dyeing - Information on concentration and dyeing time (dyeing processing data) ·Hard coat type information (hard coat processing data) - Information on AR coating type (processing data for AR coating) - Information on prescription values ​​and standard values ​​to be compared with the measured values ​​in the optical inspection (power and thickness) of the final product, as well as information for inspecting dye colors and anti-reflective coating types (final inspection processing data) Processing information regarding the shape of the frame and the type of bevel (processing data for edging and bevel processing) - Specification information for lens circumference and angle, and bevel circumference and angle (processing data for edge printing and bevel processing inspection) Printing information such as customer name and shipping address to issue a delivery note (processing data for shipping)

[0041] The eyeglasses prescription data and the eyeglass lens prescription information including the created design data and processing data are recorded in the design information database 202 in association with the lens identification information (step S4).

[0042] Next, lens blanks are selected based on the design data (step S5). The lens blanks are selected so that when the fitting center of the frame shape on the circular blank is aligned with the geometric center of the blank, the frame shape fits and the blank outer diameter is minimized. The lens blanks selected in this manner are accommodated in a tray and transported for subsequent processes. Each tray is assigned a tray identification code, and when the lens blanks are accommodated, the tray identification code is recorded in association with the corresponding lens identification information in the design information database 202. The tray identification code is also written on the tray or on the work instruction that is transported together with the tray.

[0043] Next, the concave surface of the lens blank is blocked by a lens holder (step S6). That is, first, the tray identification code is read by the reader 263, and processing data for lens blocking corresponding to the tray identification code is acquired by referring to the design information database 202. Then, based on the acquired processing data, a lens holder is selected, and the lens blank is attached to the lens holder at an angle specified in the processing data. The lens blank is attached to the lens holder by taping a protective film for preventing scratches on the concave surface of the blank in advance, pouring a low melting point alloy (hereinafter referred to as alloy) between the lens holder and the lens blank, and solidifying the alloy. It is preferable to fix the lens blank with an alloy mainly composed of indium when processing the convex surface, and to use wax when processing the concave surface. The lens blank with the lens holder attached is stored in the tray again.

[0044] Next, the convex surface is cut (step S7). That is, first, the control terminal 210 reads the tray identification code displayed on the tray by the reader 213. After reading the tray identification code, the control terminal 210 acquires cutting and polishing processing data corresponding to the tray identification code from the design information database 202. Then, the lens blank is attached via a lens holder to a curve generator 211 that performs three-dimensional NC control, and the control terminal 210 controls the curve generator 211 based on the processing data to cut the convex surface into a predetermined convex shape.

[0045] Next, the blank with the convex surface cut is attached to a sand grinder 212, and the control terminal 210 controls the sand grinder 212 based on the cutting and grinding data to finish the blank into a desired spherical surface or free-form surface (step S8).

[0046] Next, a target mark is printed on the convex surface of the lens blank after polishing (step S9). FIG. 5 is a diagram showing the convex surface of the lens blank. As shown in the figure, the target mark 40 is printed at a predetermined distance above the center of the lens blank and on both sides in the lateral direction. It is preferable that the distance from the center of the lens blank to the target mark 40 is smaller than the distance from the center of the lens blank to the alignment reference marks 31a and 32a. The target mark 40 is printed, for example, by ink jet or stamp pen.

[0047] Next, laser marking is performed (step S10). That is, first, the control terminal 230 reads the tray identification code displayed on the tray by the reading device 233. After reading the tray identification code, the control terminal 230 acquires processing data for laser marking corresponding to the tray identification code from the design information database 202. Then, the control terminal 230 detects the position and angle of the lens based on the position of the target mark 40 of the lens blank by the image processing device 232. Then, the control terminal 230 controls the laser marking device 231 based on the processing data, and laser marks the processing information mark, progressive power information mark, and identification information mark described with reference to FIG. 3 on the convex surface of the lens blank.

[0048] Next, the lens blank (semi-finished lens blank) on which laser marking has been performed is immersed in warm water at about 70° C. to melt the alloy and remove the lens holder from the semi-finished lens blank (step S11).

[0049] Next, the semi-finished lens blanks are blocked (step S12). That is, first, the tray identification code marked on the convex surface of the semi-finished lens blanks is read by the reader 263, and processing data for lens blocking corresponding to the tray identification code is acquired by referring to the design information database 202. Then, based on the acquired processing data, a lens holder is selected, and the semi-blanks are attached to the lens holder at an angle specified in the processing data. When attaching the semi-finished lens blanks, the position of the target mark 40 on the semi-finished lens blanks is detected by the image processor 232, the reference mark is positioned in accordance with the reference line of the lens holder, and the convex surface is attached to the lens holder for cutting and polishing the concave surface.

[0050] Next, cutting of the concave surface is performed (step S13). That is, first, the control terminal 210 reads the tray identification code marked on the convex surface of the semi-finished lens Bronx by the reader 213. When the control terminal 210 reads the tray identification code, it acquires cutting and polishing processing data corresponding to the tray identification code from the design information database 202. Then, the lens blank is attached to a curve generator 211 that performs three-dimensional NC control via a lens holder, and the control terminal 210 controls the curve generator 211 based on the processing data to cut the concave surface into a predetermined concave shape.

[0051] Next, the concave surface polishing process is performed (step S14). That is, the blank with the concave surface cut is attached to the sand-spraying polisher 212, and the control terminal 210 controls the sand-spraying polisher 212 based on the cutting and polishing data to finish the blank into a desired spherical surface or free-form surface. In this way, an uncut lens is produced.

[0052] Next, the uncut lens is immersed in warm water at about 70° C. to melt the alloy and remove the lens holder from the uncut lens (step S15). Next, the uncut lens is washed to remove foreign matter adhering to the lens surface (step S16).

[0053] Next, the uncut lens is subjected to optical and surface inspection (step S17). Specifically, first, the control terminal 220 reads the tray identification code marked on the convex surface of the uncut lens by the reading device 223. After reading the tray identification code, the control terminal 220 acquires inspection processing data corresponding to the tray identification code from the design information database 202. Next, the uncut lens is attached to the lens meter 221. The control terminal 220 compares the aberration and diopter measured by the lens meter 221 with the standard values ​​of the processing data to determine whether a predetermined optical performance is obtained. Next, the uncut lens is attached to the thickness meter 222. The control terminal 220 compares the thickness of the uncut lens measured by the thickness meter 222 with the standard values ​​of the processing data to determine whether the lens is molded into a predetermined lens shape. In addition, the uncut lens is visually inspected for its appearance. At this time, even if the uncut lens has a defect, if it is outside the marked shape line 3, it can be determined that it does not affect the performance of the eyeglass lens.

[0054] Next, the dyeing process is performed (step S18). That is, first, the display terminal 260 reads the tray identification code marked on the convex surface of the uncut lens by the reader 263. After reading the tray identification code, the display terminal 260 obtains and displays dyeing processing data corresponding to the tray identification code from the design information database 202. Based on the displayed dyeing processing data, the worker immerses the uncut lens in a dye of a specified color type and concentration for a specified dyeing time. At this time, since the top and bottom of the eyeglass lens can be distinguished by the position mark 34, the uncut lens can be immersed in the dye with the correct top and bottom.

[0055] Next, the hard coat process is performed (step S19). That is, first, the display terminal 260 reads the tray identification code marked on the convex surface of the uncut lens by the reading device 263. After reading the tray identification code, the display terminal 260 obtains and displays hard coat processing data corresponding to the tray identification code from the design information database 202. Based on the displayed hard coat processing data, the worker immerses the uncut lens in the specified type of hard coat, bakes the uncut lens, and forms a hard film on the lens surface. Note that in the hard coat process, a large number of eyeglass lenses may be hard-coated at once. In such a case, mix-ups can be prevented by reading the tray identification code marked on the convex surface of the uncut lens by the reading device 263.

[0056] Next, the AR coating process is performed (step S20). That is, first, the display terminal 260 reads the tray identification code marked on the convex surface of the uncut lens by the reading device 263. After reading the tray identification code, the display terminal 260 obtains and displays AR coating processing data corresponding to the tray identification code from the design information database 202. Based on the displayed AR coating processing data, the worker deposits a specified type of film-forming material on the surface of the uncut lens by a vacuum deposition method. Note that in the AR coating process, a large number of eyeglass lenses may be AR-coated at once. In such a case, mix-ups can be prevented by reading the tray identification code marked on the convex surface of the uncut lens by the reading device 263.

[0057] Next, a final inspection of the uncut lens is performed (step S21). Specifically, first, the control terminal 220 reads the tray identification code marked on the convex surface of the uncut lens by the reading device 223. After reading the tray identification code, the control terminal 220 acquires the final inspection processing data corresponding to the tray identification code from the design information database 202. Next, the uncut lens is attached to the lens meter 221. The control terminal 220 compares the aberration and the power measured by the lens meter 221 with the standard values ​​of the processing data to determine whether or not a predetermined optical performance is obtained. Next, the uncut lens is attached to the thickness meter 222. The control terminal 220 compares the thickness of the uncut lens measured by the thickness meter 222 with the standard values ​​of the processing data to determine whether or not the lens is molded into a predetermined lens shape. Furthermore, the control terminal 220 inspects whether the dye color and the anti-reflection film are formed as specified based on the processing data. Also, the uncut lens is visually inspected for its appearance. At this time, even if there is a defect in the uncut lens, if it is outside the marked shape line 3, it can be determined that it will not affect the performance of the eyeglass lens.

[0058] Next, the uncut lens is blocked (step S22). That is, first, the tray identification code marked on the convex surface of the uncut lens is read by the reader 263, and processing data for lens blocking corresponding to the tray identification code is acquired by referring to the design information database 202. Then, based on the acquired processing data, a lens holder is selected, and the uncut lens is attached to the lens holder at an angle specified in the processing data. When attaching the uncut lens, the position of the target mark 40 of the uncut lens is detected by the image processing device 232, the reference mark is aligned with the reference line of the lens holder to position it, and the convex surface is attached to the lens holder for cutting and polishing the concave surface.

[0059] Next, the control terminal 240 reads the tray identification code marked on the convex surface of the uncut lens by the reader 243. Then, the uncut lens fixed to the lens block tool is attached to the chuck interlock 242. Then, in order to grasp the position (tilt) of the uncut lens in a state where it is attached to the chuck interlock 242, the positions of at least three points on the lens front surface (or back surface) that are designated in advance are measured (step S23). The measured values ​​obtained here are recorded in the design information database 202 together with the tray identification code to be used as calculation data in step S24.

[0060] Next, the eyeglass lens design device 201 performs bevel processing design calculation. However, in actual processing, an error may occur between the calculated position of the uncut lens and the actual position of the uncut lens, so this error is corrected when the coordinate conversion to the processing coordinate is completed. That is, the eyeglass lens design device 201 corrects the error between the calculated position of the uncut lens and the actual position of the uncut lens based on the position measurement values ​​of the three points measured in step S23, calculates the final three-dimensional bevel tip shape, and updates the processing data for edging and bevel processing corresponding to the tray identification code recorded in the design information database 202 (step S24).

[0061] Next, the lens grinding device 241 acquires processing data for edging and beveling corresponding to the tray identification code by referring to the design information database 202. Then, the lens grinding device 241 performs edging and beveling of the uncut lens according to the received processing data for edging and beveling (step S25).

[0062] Next, the control terminal 250 reads the tray identification code marked on the convex surface of the uncut lens with the reading device 253. Then, the control terminal 250 refers to the design information database 202 to acquire processing data for edging and bevel processing inspection corresponding to the tray identification code. Next, the control terminal 250 uses the shape measuring device 251 to measure the circumference and angle of the lens (spectacle lens) after edging and bevel processing has been completed, and the circumference and shape of the bevel apex (step S26).

[0063] Then, the control terminal 250 judges whether the circumference and angle of the lens (spectacle lens) measured in step S26 and the circumference and shape of the bevel apex are within standard values ​​based on the acquired edging and bevel processing inspection processing data. If they are within the standard values, it is judged to be an acceptable product in which the edging and bevel processing have been performed with sufficient precision (step S27). In addition, an appearance inspection is also performed to check whether scratches, burrs, chips, etc. have occurred on the spectacle lens due to the edging.

[0064] Next, the control terminal 270 reads the tray identification code marked on the convex surface of the uncut lens with the reader 273. Then, the control terminal 270 refers to the design information database 202 to obtain the processing data for shipping that corresponds to the tray identification code. Then, the control terminal 270 prints the payment slip and information on the shipping destination (optician's shop) with the printer 271. Then, the lens is packaged together with the payment slip, and the information on the shipping destination is attached to the package and shipped (step S28).

[0065] In addition, when the uncut lenses are shipped without being processed into the shape of a spectacle frame, steps S22 to S27 can be omitted. In addition, in the above embodiment, the case where spectacle lenses are manufactured from lens blanks has been described, but the present invention can also be applied to the case where spectacle lenses are manufactured from semi-finished lens blanks. In this case, steps S5 to S8 can be omitted. In addition, in each of the above steps, the tray identification code is read, but this is not limited to this, and lens identification information may be read instead.

[0066] If the eyeglass lens is broken, the identification number 35A written on the eyeglass lens is read using, for example, a magnifying glass. Then, the identification number is transmitted from the user terminal to the order terminal 301 of the eyeglass store 100 or the support terminal 302 of the manufacturer. The clerk of the eyeglass store 100 or the manufacturer confirms the user by referring to the design information database 201 and the user information of the lens identification information corresponding to the identification number. Then, by executing the above-described steps S5 to S28, an eyeglass lens having the same shape as the broken eyeglass lens is shipped to the user or the eyeglass store. Note that the method of reading the identification number 35A is not limited to the method of reading it using a magnifying glass. For example, a method of importing an image acquired by a camera into a PC and decoding it, or a method of attaching a magnifying glass to a smartphone and reading it can be used.

[0067] Furthermore, the optician or manufacturer can refer to the design information database 201 from the support terminal 302 to perform customer management and handle complaints.

[0068] As described above, according to this embodiment, before the concave cutting process step (step S13), the identification mark 35 for identifying the eyeglass lens and the processing information mark including the tray identification 2D code 33a, the tray identification code 33b, the shape line 3, and the position mark 34 used when processing the lens blanks are marked by a laser, so that the identification mark 35 and the processing information mark can be marked in one process, and the labor of laser marking can be reduced. In addition, since the marking of the processing information mark and the marking of the identification mark 35 can be performed together, they can be performed by one laser irradiation device, and therefore the maintenance cost of the laser irradiation device can be reduced.

[0069] In this embodiment, the identification mark 35 is marked in the area of ​​the lens material that is to be used as a spectacle lens. Therefore, the identification mark 35 remains on the finished spectacle lens, and even if the spectacle lens is damaged, for example, the lens identification information can be read from the identification mark 35, making it easy to remanufacture the spectacle lens.

[0070] In this embodiment, the processing information mark includes a tray identification code 33b associated with the lens material, and eyeglass lens prescription information is recorded in the design information database 202 in association with the tray identification code 33b, and the tray identification code 33b is marked outside the area of ​​the lens material used as an eyeglass lens, and in the concave surface cutting process, the tray identification code 33b is read, and eyeglass lens prescription information (processing data) corresponding to the tray identification code 33b is obtained by referring to the design information database 202, and the concave surface is cut based on this eyeglass lens prescription information. Thus, in this embodiment, in each process, the tray identification code 33b marked on the lens blank is read, and eyeglass lens prescription information (processing data) corresponding to the tray identification code 33b is obtained and processing is performed, so that the instruction sheet can be minimized.

[0071] In this embodiment, the design information database 202 records eyeglass lens prescription information in association with the lens identification information corresponding to the identification mark 35, and the process includes a step of reading the identification mark 35 marked on the eyeglass lens, and a step (S5 to S28) of remanufacturing the eyeglass lens based on the eyeglass lens prescription information corresponding to the read identification mark 35. This makes it easy to remanufacture the eyeglass lens.

[0072] In addition, this embodiment is not limited to the above-described embodiment, and may be appropriately modified within the scope of the technical idea of ​​the present disclosure. For example, in this embodiment, the convex surface polishing (S8) and the concave surface polishing (S14) are performed, but the surfaces may be finished by the convex surface cutting process (S7) and the concave surface cutting process (S13) without performing these polishing processes.

[0073] In addition, in this embodiment, an example in which both the convex and concave surfaces of the lens blank are cut and polished is given, but the present invention is not limited to this. Depending on the product, the convex surface of the lens blank may be completed by cast molding, and only the concave surface may be cut and polished without cutting and polishing the convex surface. In this case, the steps of processing the convex surface (S6 to S8) of this embodiment are not performed. In addition, the concave surface of the lens blank may be completed by cast molding, and only the convex surface may be cut and polished without cutting and polishing the concave surface. In this case, the steps of processing the concave surface (S12 to S15) of this embodiment are not performed. In addition, both the convex and concave surfaces of the lens blank may be completed by cast molding, and dyeing or coating may be performed without cutting and polishing the convex and concave surfaces. In this case, the steps of processing the convex surface (S6 to S8) and the steps of processing the concave surface (S12 to S15) of this embodiment are not performed.

[0074] In addition, in this embodiment, the diameter of the dots formed by the laser is less than 70 μm, so the identification information remaining on the eyeglass lens is very small, does not impair aesthetics, and does not cause discomfort to the eyeglass wearer.

[0075] In this embodiment, the depth of the dots formed by the laser is 0.1 μm or more and 3 μm or less. With such dot dimensions, each mark can be seen even if the lens is dyed, hard coated, AR coated, etc.

[0076] The method for producing the eyeglass lens of the present disclosure will be summarized below. One embodiment of the present invention is a method for manufacturing eyeglass lenses from lens material, and includes a marking process (step S10) of forming holes or grooves using a laser on a convex surface of the lens material to mark an identification mark 35 for identifying the eyeglass lens and processing information marks including a tray identification 2D code 33a, a tray identification code 33b, a shape line 3, and a position mark 34 used when processing the lens blanks, and a concave cutting process (step S13) of reading the processing information mark and cutting the concave surface of the lens blank based on the read processing information mark.

[0077] Moreover, one embodiment of the present invention is a system 1 for manufacturing eyeglass lenses from lens material, which includes a design information database 202 in which an identification information mark 35 for identifying an eyeglass lens and a prescription for the eyeglass lens are recorded in correspondence with each other, a laser marking device 231 that marks the identification mark 35 for identifying the eyeglass lens and processing information marks including a tray identification 2D code 33a, a tray identification code 33b, a shape line 3, and a position mark 34 used when processing the lens material by forming holes or grooves on the convex surface of the lens material with a laser, and a curve generator 211 that reads the processing information mark and cuts the concave surface of the lens material based on the read processing information mark. [Explanation of symbols]

[0078] 1. Eyeglass lens manufacturing system 3 Shape Line 10 Lens Blanks 31a Alignment reference mark 31b Applied power mark 33a 2D code for tray identification 33b Tray Identification Code 34 Position Mark 35 Identification Mark 35A Identification Number 35B Arc section 40 Target Mark 100 Optical store 101 Ordering terminal 102 Frame shape measuring instrument 200 Factories 201 Eyeglass lens design device 202 Design Information Database 210 Control terminal 211 Curve Generator 212 Polishing machine 213 Reading device 220 Control Terminal 221 Lens Meter 222 Wall thickness gauge 230 Control Terminal 231 Laser marking equipment 232 Image Processing Device 233 Reading device 240 Control Terminal 241 Lens grinding equipment 242 Chuck Interlock 243 Reading device 250 Control Terminal 251 Shape measuring instrument 253 Reading device 260 Display Terminal 263 Reading Device 270 Control Terminal 271 Printer 273 Reading device 300 Network 301 User terminal 302 Support terminal

Claims

1. A plastic eyeglass lens, An identification information mark for identifying the eyeglass lens is provided on a surface of a lens material, the identification information mark including a unique number assigned to each eyeglass lens; The identification information mark is formed on the lens material in a region to be used as the eyeglass lens, and is made of laser markings formed only by dots having a diameter of 5 to 30 μm and a depth of 0.1 to 3 μm and formed at a predetermined interval, and The lens further includes a hard film formed on the lens material by hard coating treatment, The identification information mark is formed in an area to be used as the eyeglass lens, and enables the eyeglass lens to be remanufactured by reading the unique number, A spectacle lens, wherein the unique number can be read under magnification from the lens surface on which the hard film is formed.

2. The spectacle lens of claim 1 , wherein the laser marking is formed on a convex surface of the lens material.

3. The eyeglass lens according to claim 1 , wherein the identification information mark can be authenticated by OCR.

4. 4. The eyeglass lens according to claim 1, wherein the eyeglass lens is a progressive power lens, and a progressive power information mark is formed by the laser marking in an area used as the eyeglass lens.

5. The eyeglass lens according to any one of claims 1 to 4, further comprising an AR coating on a surface thereof.

6. The eyeglass lens according to any one of claims 1 to 5, wherein the eyeglass lens is an uncut lens.

7. The eyeglass lens according to any one of claims 1 to 6, wherein the eyeglass lens is an uncut lens and includes, as a laser marking, a shape line indicating a shape area in which the lens shape when fitted into an eyeglass frame is 5 to 10% larger.

8. The eyeglass lens is an uncut lens, The eyeglass lens according to any one of claims 1 to 7, comprising an identification code associated with a lens material as a laser marking outside the area to be used as the eyeglass lens.

9. A semi-finished lens blank comprising a lens material for forming a spectacle lens by processing a concave surface of the lens blank into a predetermined concave shape, a convex surface of a predetermined shape that is processed based on design information of the eyeglass lens; The convex surface is laser marked, The applied laser marking includes an identification information mark for identifying the eyeglass lens, the identification information mark including a unique number assigned to each eyeglass lens, the unique number being assigned to each eyeglass lens; the identification information mark is a mark consisting of dots formed at a predetermined interval on the lens material, the diameter of the dots is 5 to 30 μm, and the depth of the dots is 0.1 μm to 3 μm, The identification information mark is formed in an area to be used as the eyeglass lens, and enables the eyeglass lens to be remanufactured by reading the unique number, A semi-finished lens blank, wherein the unique number is readable with magnification.

10. The semi-finished lens blank according to claim 8 , wherein the identification information mark is capable of being authenticated by OCR.

11. 10. The semi-finished lens blank according to claim 8, further comprising a shape line as a laser marking which indicates a shape area in which the lens shape when fitted into an eyeglass frame is 5 to 10% larger.

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