JP2006053227A - Marking method to spectacle lens and spectacle lens - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a marking method to spectacle lenses for marking the additional permanent marks to take place of the marks put on the surfaces of spectacle lenses to a side inner than the boxed shape regions of the spectacle frame when the marks are no more cut out at the time of working the peripheral edges of the uncut lenses, and also to provide the spectacle lens. <P>SOLUTION: The marking method includes: an operation process of superposing and virtually operating the data on the standard permanent mark position on a spectacle lens face and data on a box shaped region of a spectacle frame laid out according to a prescription; a judgment process for judging whether the standard permanent mark position obtained by the operation process is an inner side or outer side of the box shaped region; a setting and operation process of operating and setting a position where the fresh additional permanent mark is imparted when the position is the outer side as a result of the judgment; and a marking process of marking the additional permanent mark in the position on the lens face set in the set and operation process. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a marking method for applying a hidden mark to a lens surface in a manufacturing process of a spectacle lens and the spectacle lens.

  Permanent marks on progressive-power eyeglass lenses are generally called hidden marks, which indicate the optical layout on the lens surface and serve as a reference for identifying the fitting point position. It is. The fitting point is a point on the lens that is designed as a point through which a line of sight passes when the spectacle wearer sees the distance from the horizontal front. The permanent mark is used as a reference for alignment when the uncut lens is processed into a peripheral edge (also referred to as edge trimming) in accordance with a lens shape such as a spectacle frame.

  In addition, in the ISO standard and the JIS standard, two alignment reference marks that are 34 mm apart from each other as a permanent mark with respect to the progressive power eyeglass lens, and the addition refractive power or its abbreviation and its trade name or trade name, or their It is specified to add an identification mark consisting of an abbreviation.

  When a permanent mark is applied to a spectacle lens, the permanent mark (hidden mark) is required to be as inconspicuous as possible due to the nature of the product. For this reason, in general, it is not possible to recognize with the naked eye, but is given so that it can be recognized as necessary (for example, by observing from a specific angle).

  At a spectacle lens factory, an order for a spectacle lens having a peripheral edge processed is received from a spectacle store using a public communication line such as the Internet. In this case, the spectacles wearer's layout data and the spectacle frame shape data measured by the target lens shape measuring device (frame tracer) are sent from the spectacle store as data relating to the spectacle spectacle frame. Based on the sent layout data and target lens shape data, the spectacle lens factory processes the peripheral edge of the uncut lens to provide a spectacle lens having a shape suitable for the target lens shape of the spectacle frame and stores it in the spectacle store. Then, the spectacle lens sent from the spectacle lens factory is put into a spectacle frame at a spectacle store, and the completed spectacles are provided to the customer (spectacle wearer). Such an ordering system for eyeglass lenses is generally performed.

  By the way, as a recent customer trend, a spectacle frame having a small target lens shape has been favored and has become popular. When providing spectacle frames in which a progressive-power spectacle lens is framed in such a spectacle frame with a small lens shape, permanent marks (hidden marks) such as alignment reference marks and identification marks displayed on the lens surface of the uncut lens ) Will be cut by peripheral processing.

FIG. 5 is a diagram showing a state in which a standard permanent mark and target lens shape area data are combined and simulated on the lens surface of the uncut lens 1 for a progressive power spectacle lens. This uncut lens 1 is a left eye (L) lens made of synthetic resin, and the distance power, near power, outer diameter, and lens refractive index are arbitrary numerical values. 2 is a prism measurement point, 3 is a lens-shaped region of the spectacle frame, 31a is a nose side alignment reference hidden mark (standard permanent mark), 31b is an item (product) name hidden mark (standard permanent mark), and 32a is an ear side The alignment reference hidden mark (standard permanent mark), 32b is an added refractive power display hidden mark (standard permanent mark), and FP is a point (fitting point) for aligning the pupil center of the user when wearing the spectacle lens. In addition, a mark indicating the lens manufacturer is also displayed.

  The prism measurement point 2 is a reference point in the lens design of the progressive-power eyeglass lens, and is the midpoint position of the alignment reference hidden marks 31a and 32a indicating the alignment reference. It can be seen that the addition power of the lens is 2.75 D (diopter) from the notation of “275” in the addition power display hidden mark 32b indicating the abbreviation. The product name of the lens manufacturer can be known from “SP4” of the item name concealment mark 31b.

  When the lens shape region 3 of the spectacle frame is synthesized and simulated on the lens surface of the uncut lens 1 with the prism measurement point 2 as a reference, if the lens shape region 3 is small, the alignment reference concealment mark 31a and the item name concealment are performed. It can be seen that the mark 31b is outside the target lens shape region 3. If the uncut lens 1 is processed in the peripheral edge in this state to produce a spectacle lens, the alignment reference hidden mark 31a and the item name hidden mark 31b are cut and do not remain on the lens surface.

  Thus, when permanent marks such as the alignment reference hidden mark 31a and the item name hidden mark 31b are not left on the lens surface of the lens (glasses lens) that has been processed into a lens by the peripheral processing of the uncut lens 1, The following problems occur: The layout criteria determined on the lens surface of progressive-power eyeglass lenses are unclear, and the positions of distance and near fitting points and prism measurement points cannot be specified, and accurate glasses cannot be assembled. . In addition, it is impossible to check whether the progressive-power spectacle lens is framed accurately and horizontally with respect to the spectacle frame, and a distance or near fitting point or prism determined on the lens surface. The position of the measurement point cannot be specified. Also, it is not possible to check whether or not the glasses are suitable for the spectacle wearer. Furthermore, if the identification mark is cut, lens information such as the manufacturer name and item name cannot be understood. In other words, if the mark is cut by the peripheral processing of the lens, it will be in a state where it cannot be assembled or inspected as a finished product. This is a common problem that can occur at eyeglass lens factories that assemble and ship finished eyeglasses, and at eyeglass stores that receive lens-finished lenses.

Thus, for example, Patent Document 1 is known as a method for marking a permanent mark on the lens surface of an uncut lens.
JP 2000-19463 A

  The progressive multifocal lens manufacturing method described in Patent Document 1 calculates the predicted position of the lens edge after the lashing process based on the shape information of the spectacle frame and the layout information of the spectacle lens, and predicts the lens edge. A virtual boundary line 10 mm inside is calculated from the position, and the stamp indicating the length of the progressive zone and the stamp indicating the near-centering amount are stamped so that they are located between the predicted position of the lens edge and the virtual boundary line. The reference position is set. The length of the progressive zone is the parameter that most affects the optical characteristics of the progressive multifocal lens, and is often about 14 mm. The near inset amount is an offset amount of the near portion with respect to the far portion, and is about 0 to 5 mm.

However, in the method of manufacturing a progressive multifocal lens described in Patent Document 1, when the target lens shape region of the spectacle frame is small and elongated, the outer peripheral edge of the uncut lens, which is a material of the progressive power spectacle lens, is When trimmed to match the target lens shape, the left and right alignment reference marks 3 that normally serve as a reference for the optical coordinate system are spaced 34 mm horizontally from the vertical line passing through the fitting point. Therefore, if the length of the target lens shape in the horizontal direction is small, the nose side mark of the reference mark 3, or the ear side mark or both the nose side and the ear side mark may be cut by peripheral processing. There was a problem. Such a problem has arisen as a recent trend due to the spread of relatively small eyeglass lenses having a lens shape. However, there is no conventional marking method for solving such problems, and the virtual permanent position of the standard permanent mark on the lens surface and the eyeglass shape area of the spectacle frame laid out according to the prescription are calculated in advance. It was not determined whether the position of the standard permanent mark was inside or outside the target lens shape region.
Also, no permanent mark was added on the lens surface based on the determination result. In the present invention, a permanent mark that conforms to the ISO standard or JIS standard and is given to a progressive-power spectacle lens with a predetermined design at a predetermined position determined by a spectacle manufacturer is referred to as a “standard permanent mark”. In addition, when the standard permanent mark is cut by the peripheral processing, the permanent hidden mark that is added and added later in the marking process so as to satisfy the same function is referred to as an “additional permanent mark”.

  The present invention has been made to solve the above-described conventional problems, and its object is to attach the surface of an uncut lens in a manufacturing process of a progressive power spectacle lens or a single focus spectacle lens. If the standard permanent mark is lost by cutting the peripheral edge, the marking method for the spectacle lens and the spectacle lens for marking the additional permanent mark in place of the mark so as to be inside the target lens shape area of the spectacle frame It is to provide.

  In order to achieve the above object, a first invention is a marking method for a spectacle lens in which a permanent mark indicating various information of a progressive power spectacle lens is marked on the surface of the uncut lens. A calculation step of superimposing the data of the standard permanent mark position and the lens shape area data of the spectacle frame laid out according to the prescription, and the standard permanent mark position obtained by the calculation step is the ball A determination process for determining whether the area is inside or outside the mold shape area, and if the result of the determination process is that the standard permanent mark position is outside the target lens shape area, a new additional permanent mark is provided. An additional setting calculation step for calculating and setting the position to be performed, and the additional permanent mark at the position on the lens surface set in the additional setting calculation step. The is that a marking step of marking.

  In a second aspect based on the first aspect, the standard permanent mark or the additional permanent mark is any one of an alignment reference mark, an abbreviated addition power, and a lens identification mark.

  According to a third invention, in the first or second invention, the additional setting calculation step calculates and sets a position of an additional permanent mark that is an alignment reference mark at a position indicating a horizontal direction of the progressive-power spectacle lens. To do.

  In a fourth aspect based on the first aspect, the additional setting calculation step sets the position of the additional permanent mark, which is an alignment reference mark, at a position indicating a vertical line passing through the fitting point of the progressive-power spectacle lens. It is calculated and set.

  According to a fifth invention, in any one of the first to fourth inventions, a shape of the additional permanent mark to be marked in the marking step is a shape different from the standard permanent mark.

  In a sixth aspect based on any one of the first to fifth aspects, the marking step is laser marking.

  In a seventh aspect based on any one of the first to sixth aspects, the spectacle lens is a single focus spectacle lens instead of the progressive addition spectacle lens, and the additional permanent mark is a quality assurance mark.

  An eyeglass lens according to an eighth aspect is provided with an additional permanent mark by the marking method for the spectacle lens according to any one of the first to seventh aspects.

According to the marking method for the spectacle lens according to the present invention, when a standard permanent mark such as an alignment reference mark or an identification mark is cut by peripheral processing due to a small shape of the spectacle frame, the permanent mark is used instead. Since the mark is marked at a position inside the target lens shape, the layout standard determined on the lens surface of the progressive-power eyeglass lens becomes clear. In addition, since the positions of the far and near fitting points and the prism measurement points can be specified, the glasses can be assembled accurately.
In addition, since it is possible to check whether or not the progressive-power spectacle lens is correctly framed horizontally with respect to the spectacle frame, a distance or near fitting point or prism determined on the lens surface The position of the measurement point can be specified. It is also possible to check whether the eyeglasses are suitable for the spectacle wearer. Also, lens information such as manufacturer name and item name can be found from the additional permanent mark. Furthermore, since the additional permanent mark is marked in a shape different from the standard permanent mark, both can be distinguished.
Such an effect is an advantage that can be shared between the manufacturing side and the customer side (glasses store).

Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.
FIG. 1 is an overall configuration diagram of a spectacle manufacturing and supply system including a marking method for a spectacle lens according to the present invention.

  Here, in the present invention, in the manufacturing process of the spectacle lens, the name of the intermediate product is changed to be referred to as blanks (or lens blanks), semi-blanks, or uncut lenses, and edge processing is performed on the lens shape of the spectacle frame ( A lens that is also referred to as peripheral processing is referred to as a spectacle lens. Blanks are lenses whose convex and concave surfaces are unpolished, and semi-blanks are lenses whose convex surfaces are polished to a desired optical surface and whose concave surfaces are unpolished. An uncut lens is a lens before edge trimming in which both convex and concave surfaces are polished to a desired optical surface.

  In FIG. 1, an eyeglass manufacturing supply system shows an example applied to marking on a progressive-power eyeglass lens made of plastic. An ordering terminal 101 and an eyeglass lens design device (hereinafter referred to as a main frame) 201 connect a communication line 300. Connected through. The ordering terminal 101 is disposed in an eyeglass store 100 as an ordering source. The main frame 201 is disposed in a factory 200 as a manufacturer of eyeglasses. On the factory 200 side, various lens processing apparatuses are connected to the main frame 201 via the LAN 202, and the main frame 201 and the lens processing apparatus constitute a spectacle lens manufacturing apparatus.

  Here, although only one spectacle store 100 is shown as an ordering source in FIG. 1, a plurality of spectacle stores are actually connected to the factory 200. In addition to the spectacle store 100, an ordering source may be an ophthalmologist or an individual. Further, the communication line 300 may be the Internet, other public lines, or a dedicated line such as a LAN. A relay station may be provided between the ordering terminal 101 and the main frame 201.

  The order terminal 101 is made of, for example, a personal computer, and includes a display unit, an input unit, a communication control unit, and the like. The display unit displays a guidance screen that supports input of various data necessary for ordering the spectacle lens. The input unit is for inputting prescription data of the eye to be examined according to the guidance screen. The communication control unit controls data communication with the main frame 201.

  The main frame 201 acquires spectacle lens prescription information and the like from the ordering terminal 101, and designs the spectacle lens so as to conform to the prescription. The main frame 201 includes a storage unit, a calculation control unit, a communication unit, and the like.

  The storage unit stores a design program, a machining data generation program, and the like. The design program has a function of causing a computer to acquire prescription information for a pair of left and right eyeglass lenses, and a function of creating design data for each eyeglass lens based on the acquired prescription information.

  The processing data generation program realizes a function of generating processing data necessary for the lens processing apparatus to perform actual lens processing on the computer based on the design data created by the design program.

  The arithmetic control unit executes a design process or the like by executing the design program or the like. In addition, the arithmetic control unit executes the processing data generation program to generate processing data as control information for the lens processing apparatus, and performs control to transmit the generated processing data to the lens processing apparatus.

  The communication unit transmits and receives data between the ordering terminal 101 and the lens processing device under the control of the arithmetic control unit.

  As the lens processing apparatus, an eyeglass lens is actually manufactured based on processing data acquired from the main frame 201 via the LAN 202. In FIG. 1, for convenience, the lens processing apparatus is shown as one block. However, as this lens processing apparatus, an NC control lens including a curve generator 211, a sanding grinder 212, a lens meter 221, a thickness gauge 222, and a machining center. Examples thereof include a grinding device 241, a chuck interlock 242, and a bevel apex shape measuring device 251. In addition, 102 is a frame shape measuring device, 210, 220, 230, 240, 250 are terminal computers, 231 is a marker device, and 232 is an image processing device.

  Thus, in the lens manufacturer's factory 200, the lens design system, lens surface grinding system, peripheral edge processing system, marking system, inspection system, etc. are connected to the main frame 201 via a communication line such as the LAN 202. , The network is built.

Next, the flow from product ordering to delivery will be described with reference to the flowchart of FIG.
The marking method for the spectacle lens according to the present invention is executed in this flow.

[Ordering]
First, an input screen is displayed on the display unit of the ordering terminal 101 in the spectacle store 100. According to the guidance on the input screen, the salesperson etc. prescribes the prescription data of the customer's eye, the lens shape data of the spectacle frame measured by the frame shape measuring instrument 102, and other spectacle lens specifications necessary for designing the lens. Information is input (step S1).

  The spectacle frame specification information includes bevel type, bevel position, three-dimensional frame shape information, antireflection film type, lens color type, product code for specifying spectacle lens type, and the like. The prescription data of the spectacle lens includes the spherical refractive power, cylindrical refractive power, astigmatism axis, addition power, interpupillary distance, and naked eye visual acuity of the left and right eyes of the customer. The inputted spectacle lens information, prescription value, and spectacle frame frame information are transferred online to the main frame 201 of the factory 200 via the communication line 300 (step S2).

[Machining data calculation]
The main frame 201 calculates processing data used in the lens processing apparatus from the transferred data (step S3), and transfers the processing data to each processing apparatus through the LAN 202. Upon completion of the calculation, the factory 200 issues a work order including the contents of the order received and the processing instruction.

[Issuing work instructions]
As the work instructions, two sheets, a concave working instruction and a convex working instruction, are created (steps S4 and S5). First, in response to an order from the spectacle store 100, the concave surface processing work instructions are automatically output to the site, and the convex surface processing work instructions are continuously output. The contents of the processing work instructions are composed of spectacle prescription-related information, frame-related information, measurement-related information, and manufacturing-related information, and are referred to in each manufacturing process as necessary.

  The spectacle prescription related information includes, for example, prescription average refractive power, prescription astigmatic refractive power, direction of prescription astigmatic refractive power, prescription addition refractive power, prescription PD, prescription prism, length of progressive zone length, type of addition definition method (Convex surface addition definition, Concave surface addition definition, Wear addition definition) and the like.

  The frame related information includes a frame shape, a frame center interval (FPD), and the like. The measurement related information includes, for example, the horizontal position of the distance measurement point, the vertical position of the distance measurement point, the horizontal position of the near measurement point, the vertical position of the near measurement point, and the machining surface. The refractive power, lens thickness, etc.

  The manufacturing related information includes, for example, product name, blanks name, blanks nominal curve, used blanks outer diameter, curve value of yato blanks holding surface, yatoi outer diameter, block ring diameter, yato type, uneven surface of blanks before processing It includes curvature, center wall thickness before processing, order date, order number, delivery date, one-dimensional barcode indicating tray number, etc.

  The tray is a case for storing blanks, is handled as a job unit, and stores or transports issued processing work instructions together with blanks.

[Select lens blanks]
On the circular blank, the fitting center in the frame shape and the geometric center of the blank are made coincident, and the blanks outer diameter that fits the frame shape and minimizes the outer diameter of the blanks is calculated and selected (step S6). The selected blanks are made of plastic and do not have the desired design optical surface on both sides, and may be a disk-like cylinder or any curved surface as long as the shape can be blocked. In both cases, accuracy as high as the optical surface is not required.

[Blanks block (concave)]
Next, it arrange | positions so that the geometrical center of blanks and holding jig centers, such as a lens holding body, may correspond on the same axis | shaft, and a concave surface is blocked by a lens holding body (step S7).

In order to attach the blanks to the lens holder, a protective film for preventing scratches is brought into close contact with the concave surface of the blanks in advance, and the lens holder is mounted thereon by a device called a layout blocker. The lens holder is composed of a yatoe made of tool steel or the like and an adhesive interposed between the yatoi and the concave surface of the blanks. As the adhesive, an alloy having a low melting point (hereinafter referred to as an alloy: for example, an alloy of Bi, Pb, Sn, Cd, In, a melting point of about 47 ° C.) is used (for example, see Patent Document 2).
JP 2003-334748 A

[Cutting for creating convex optical surface]
The blanks with the lens holder attached to the concave surface in this way are attached to a curve generator that performs three-dimensional NC control via a yatoi, and the convex surface is cut into a predetermined surface shape (step S8).

[Convex surface polishing]
The blanks whose convex surfaces have been cut are further polished by a polishing apparatus (see, for example, Patent Document 3) to be finished into a desired spherical surface or free-form surface (step S9).
JP 2003-266287 A

[marking]
When the convex surface is polished, the blanks become semi-blanks, and a reference mark is marked at a reference position on the convex surface (step S10). The marking is performed by, for example, a CO ₂ laser. The marking process is performed with reference to the Yatoi reference plane. A focus alignment lens that constitutes a part of the laser irradiation apparatus is opposed to the semi-blanks that are marking objects.

  In this laser marking method, a diverging laser beam or a parallel laser beam is focused on a surface of the lens substrate or a point near the surface by a focusing lens, and the surface or surface of the lens substrate is focused by the energy of the focused laser beam. It is made to function as a mark by destroying the vicinity by melting, expansion, alteration or the like. That is, by making the refractive index, transmittance, etc. of the part that has been melted, expanded, altered, etc. different from other parts, it can be visually recognized by local changes in the surface reflection image and function as a mark that can be identified from the outside. .

[Remove lens holder]
Next, the semi-blanks on which the reference marks are marked are immersed in warm water of about 70 ° C. to melt the alloy and remove the lens holder from the semi-blanks (step S11).

[Semi-Blank Block]
A reference mark on the semi-blanks by marking in the previous process is laid out according to the reference line of the block ring of the blocker, and the convex surface is blocked for cutting and polishing the concave surface (step S12).

[Cutting and concave polishing to create a concave optical surface]
The concave cutting is the same as the convex cutting except for the difference in the design shape data, and the concave surface cutting is performed by changing the surface shape data of the cutting to the concave design shape data (step S13). The concave surface is also polished in the same manner as the convex surface polishing (step S14). This produces an uncut lens.

[Cleaning, optical and surface inspection]
When the uncut lens is manufactured by the concave surface polishing, the uncut lens is removed from the polishing apparatus and washed to remove the foreign matter adhering to the lens surface (step S15). Then, a visual appearance inspection, a power inspection with a lens meter, a projection inspection of the lens inner surface with transmitted light, and an optical performance inspection for astigmatism are performed (step S16).

[Dyeing process]
If there is an instruction for lens dyeing in the work instruction, dyeing is performed here, for example, a dyeing lens having an ultraviolet cut function (step S17).

[Hard coat process]
Further, a hard coat made of, for example, an organosilicon coating layer is formed on the surface of all uncut lenses including the dyed uncut lens (step S18).

[Antireflection coating process]
Further, an antireflection film made of an oxide coating layer is formed on the hard coat of the uncut lens by a vacuum deposition method (step S19).

  Furthermore, a water-repellent coat is formed on the surface of the antireflection film to make an uncut lens with good durability that does not show interference color unevenness and interference color change.

[Lens optical performance, appearance inspection]
A final lens optical performance inspection and an appearance inspection are performed (step S20).

[marking]
About the uncut lens which passed the said test | inspection, a permanent mark (hidden mark) is marked based on the reference mark on the convex surface marked by step S10 (step S21). The marking is performed by, for example, a CO ₂ laser. The marked uncut lens is transferred to the next edging process. This marking method is the present invention, and details of the configuration of the laser marking system for carrying out this laser marking will be described later. This marking process (step S21) is not limited to the process performed after step S20, and may be performed anytime as long as it is after the marking process in step S10 to the block process before the lens edge trimming process in step S22. For example, it may be immediately after the marking process in step 10 or after the hard coating process in step S18.

[Block before edge cutting of uncut lens]
Based on the result calculated from the order data, the lens holding block jig is fixed at a predetermined position of the uncut lens by the terminal computer 230, the marker 231 and the image processing device 232 shown in FIG. 1 (step S22).

[Lens tilt measurement in the block state]
The uncut lens fixed to the block jig is attached to the lens grinding device 241 in FIG. Then, in order to grasp the position (tilt) of the uncut lens in the state where it is mounted on the lens grinding apparatus 241, the positions of at least three points on the lens front surface (or back surface) designated in advance are measured (step S23). ). The measured value obtained here is stored for use as calculation data in step S24.

[Data calculation for edge beveling]
The main frame 201 in FIG. 1 performs a bevel machining design calculation. However, in actual processing, there may be an error between the position of the uncut lens and the actual position of the uncut lens that were obtained in the calculation. Make corrections. That is, based on the three position measurement values measured in step S23, the error between the uncut lens position and the actual uncut lens position determined in the calculation is corrected, and the final three-dimensional bevel tip is corrected. The shape is calculated (step S24).

[NC control edge beveling]
Then, based on the calculated three-dimensional bevel tip shape, three-dimensional machining trajectory data on the machining coordinates when grinding with a grindstone having a predetermined radius is calculated. The machining trajectory data calculated in step S24 is sent to the NC control lens grinding device 241 via the terminal computer 240. Then, the lens grinding device 241 performs edging and beveling of the uncut lens according to the sent data (step S25). The lens grinding device 241 may be a cutting device that performs cutting with a cutter instead.

[Beam apex circumference measurement inspection]
The terminal computer 250 and the bevel apex shape measuring device 251 measure the peripheral length and shape of the bevel apex of the lens (glasses lens) that has been subjected to edge trimming and beveling (step S26).

[Bevel finish inspection]
Then, the terminal computer 250 compares the design bevel apex circumference obtained in the calculation of step S24 with the measured value measured by the shape measuring instrument 251, and if the difference is within 0.1 mm, for example, it passes. Judged as a product. Further, the design A size that is the horizontal direction and the design B size that is the vertical direction of the frame frame created by the calculation in step S24 are compared with the A size and B size measured by the shape measuring instrument 251, and their sizes are compared. If the difference is within 0.1 mm, for example, it is determined that the product is acceptable.

  The bevel quality and quality of the bevel are inspected by comparing the bevel position and the shape of the spectacle lens after the bevel processing with the drawing of the bevel position stamped on the work order created based on the result calculated in step S24. Further, an appearance inspection is performed to determine whether the spectacle lens is scratched, burred, chipped, or the like due to edge trimming (step S27).

[Packaging, shipping]
The spectacle lens manufactured as described above and determined as a pass product by inspection is packaged (step S28) and shipped to the spectacle store 100 (step S29).

  FIG. 3 is a diagram for explaining the details of the marking step (step S21) shown in FIG. This marking process is roughly divided into three processes, a calculation process, a determination process, and a marking process, and is performed in this order. Steps St1 to St5 including the calculation step and the determination step are mainly executed in the main frame 201. In addition, steps St6 to St7, which are marking processes, are executed by a laser marking system 401 described later.

  Below, the process of marking a permanent mark and an additional permanent mark on an uncut lens is explained in full detail. In the main frame 201, first, item information of the spectacle lens, target lens shape information of the spectacle frame, layout data of the spectacle wearer, and the like are obtained and input from the spectacle store (step St1). In the next calculation step, the standard hidden mark position of the uncut lens data, which is the item information of the spectacle lens, and the target lens shape area data of the spectacle frame are combined, simulated, and virtually superimposed (step St2). In the next determination step, it is determined whether the standard hidden mark position is outside or inside the target lens shape region (step St3).

  If the mark position is outside, it is determined that the standard hidden mark is not cut and left by the peripheral processing, and the process proceeds to the marking process (step St4). If the mark position is on the inside, it is determined that the standard hidden mark remains even if the peripheral edge processing is performed, and the marking process is skipped and the process proceeds to the next process (step St5). This marking process is the marking process of (Step S21) in FIG. 2, and the image processing device 232 detects the reference mark, which is the reference position on the convex surface of the semi-blanks in the marking process of Step S10, and detects it. Based on this, the appropriate position of the additional permanent mark is calculated and set (step St6), and the set additional permanent mark is laser-marked (step St7).

  FIG. 4 is a system configuration diagram showing a laser marking system 401 for carrying out an embodiment of the method for marking a spectacle lens according to the present invention, and its peripheral network. The terminal computer 230, the marker device 231 and the image processing in FIG. FIG. 3 shows a part of the device 232 in detail. The laser marking system 401 performs marking by irradiating the surface of the spectacle lens with a permanent mark (hidden mark) indicating the optical layout of the spectacle lens. The laser marking system 401 includes a terminal computer 230 that performs processing such as marking information management, marking process management, marking history management, and control command issuance, and a reference mark that is a reference position on the spectacle lens surface by image processing. It comprises an image processing device 232 for finding, a marker device 231 for performing laser marking, and the like.

  The marker device 231 includes a laser controller 411 that receives a command from the terminal computer 230 and transmits marking shape data to the laser head 412, and an XY table 414 on which an uncut lens is placed in response to a command from the terminal computer 230. It is composed of a control PLC (programmable logic controller) 413 that transmits a movement command for moving to a marking start position or a line feed and a movement command for moving the laser head 412 to the focus height position, a Z table (not shown), and the like. Yes.

  All the marking information on the progressive-power eyeglass lens handled by the laser marking system 401 is centrally managed by the terminal computer 230. The terminal computer 230 receives, via the LAN 202, the position information data of the permanent mark, the layout information of the spectacle wearer, the lens information, the job number, and the like obtained as a result of the simulation performed by the main frame 201 corresponding to the host computer. . This position information data is transmitted to the laser controller 411 and the control PLC 413 corresponding to the lower order using, for example, the RS232C communication protocol. At the time of transmission / reception, the terminal computer 230 manages the covering information on the layout information, lens information, and marking of the eyeglass wearer by linking to the job number.

  The terminal computer 230 generates a marking pattern from the position information data of the permanent mark, and uses the laser head 412, the XY table 414, and the Z table by controlling the generated marking pattern by the laser controller 411 and the control PLC 413. Laser marking on the surface of the uncut lens.

  With the system described above, it is possible to determine whether the standard hidden (standard permanent) mark displayed on the lens surface of the uncut lens is inside or outside the target lens shape region of the spectacle frame, In this case, it is possible to calculate and set an additional hidden (additional permanent) mark equivalent to the function of the standard hidden mark and specify an appropriate position.

  6 is a diagram showing a state where an additional hidden mark is marked on the lens surface of the uncut lens shown in FIG. 5 by the marking process shown in FIG. The position of the additional hidden (additional permanent) mark is determined by calculating the optimum position in the marking process of step S21. For example, the position of the alignment reference hidden mark 31c to be marked instead of the alignment reference hidden mark 31a that is cut by the peripheral processing is on a straight line connecting the alignment reference hidden marks 31a and 32a and is located inside the target lens shape region 3. Set near. The shape is preferably a horizontal line of about 2 mm such as “−” in order to specify the horizontal position.

  Similarly, the position of the item name concealment mark 32c to be marked instead of the item name concealment mark 31b that is cut by the peripheral processing is not particularly limited as long as it is inside the target lens shape region 3, but for example, addition power Below the hidden display mark 32b is preferable. The position of the alignment reference hidden mark (additional permanent mark) 33 is set vertically above the midpoint position of the straight line connecting the alignment reference hidden marks 31 a and 32 a and in the vicinity of the inside of the target lens shape region 3. Further, the shape is preferably a vertical line of about 2 mm such as “|” in order to specify the prism measurement point 2 that is the midpoint position. Marking is performed using the laser marking system 205 at the optimum position of the additional hidden mark thus obtained.

Next, a method for checking the layout of the progressive-power spectacle lens using the additional permanent mark according to the embodiment will be described.
First, from a lens manufacturing factory, a progressive-power spectacle lens that is processed into a lens shape of a spectacle frame based on an order condition from a spectacle store is sent. At the time of shipment, the standard permanent mark is cut due to the target lens shape, and an additional permanent mark 33 shown in FIG. 6 is laser-marked on the lens convex surface side.

  In the spectacle store, first, whether or not the spectacle lens is the same as the contents of the order and the notation of the lens bag (distance dioptric power, near diopter power, addition power, etc.) are confirmed. Next, the spectacle lens whose peripheral edge has been processed is taken out from the lens bag, and the right and left of the lens and the lens product name are confirmed. Next, this spectacle lens is put into a spectacle frame. At this time, the left eyeglass lens in FIG. 6 is assembled so that the straight line connecting the alignment reference hidden mark 31c and the alignment reference hidden mark 32a is horizontal. A mark is marked with a magic pen or the like on the prism measurement point 2 which is the intersection of the straight line and the vertical line of the alignment reference hidden mark 33. Similarly, a right eyeglass lens is assembled. It is confirmed that the straight line connecting the alignment reference concealment mark 31c and the alignment reference concealment mark 32a of the left and right spectacle lenses encased in the spectacle frame is horizontal. Also, it is confirmed that the distance between the mark points of the left and right spectacle lenses is the distance between the distance pupils of the spectacle wearer.

  Furthermore, the spectacle wearer wears spectacles in which a spectacle lens is framed in a spectacle frame, and fitting adjustment is performed. Then, the distance fitting point and the near fitting point are checked to see if they are optically correctly laid out and completed as glasses. The positions of the distance fitting point and the near fitting point are obtained from the mark position of the prism measurement point 2. The distance fitting point causes the wearer to view the object at infinity and confirms whether the pupil position matches the distance fitting point position.

  Although the present invention has been described with respect to a method of marking a progressive-power spectacle lens as a spectacle lens, the present invention is not limited to this and can also be applied to marking on a single focus spectacle lens. In this case, since the quality assurance mark is displayed as a permanent mark on the single-focus spectacle lens, when this quality assurance mark is cut by the peripheral processing, this marking system is used to change the lens shape region of the spectacle frame. It is only necessary to calculate and set an appropriate position within the mark and mark an additional quality assurance mark. The quality assurance mark is a hidden mark applied on the lens surface to indicate that each manufacturer is an original brand, for example.

1 is an overall configuration diagram of an eyeglass manufacturing and supply system including a marking method for a progressive power eyeglass lens according to the present invention. It is a flowchart which shows the flow from lens order receipt to delivery. It is a figure for demonstrating the detail of the marking process shown in FIG. 1 is a system configuration diagram showing a laser marking system for carrying out an embodiment of a marking method for an eyeglass lens according to the present invention and a peripheral network thereof. It is a figure which shows the state which synthesize | combined and simulated the standard hidden mark and the lens shape area data on the lens surface of the uncut lens for a progressive power spectacle lens. It is a figure which shows the state which marked the additional hidden mark on the lens surface of the uncut lens for progressive-power spectacles lenses by this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Progressive-power eyeglass lens uncut lens, 2 ... Prism measurement point, 3 ... Eyeglass shape area of spectacle frame, 31a ... Alignment reference hidden mark (standard permanent mark), 31b ... Item name hidden mark (standard permanent mark) ), 31c... Alignment reference hidden mark (additional permanent mark), 32a... Alignment reference hidden mark (standard permanent mark), 32b... Added power display hidden mark (standard permanent mark), 32c. ), 33... Alignment reference hidden mark (additional permanent mark).

Claims (8)

In the marking method to the spectacle lens that marks the permanent mark indicating various information of the progressive power spectacle lens on the surface of the uncut lens,
A calculation step of virtually calculating the data of the standard permanent mark position on the lens surface of the uncut lens and the lens shape area data of the spectacle frame laid out according to the prescription,
A determination step of determining whether the standard permanent mark position obtained by the calculation step is inside or outside the target lens shape region;
As a result of the determination step, when the standard permanent mark position is outside the target lens shape region, an additional setting calculation step for calculating and setting a position for giving a new additional permanent mark;
A marking step for marking the additional permanent mark at a position on the uncut lens surface set in the additional setting calculation step;
A method of marking on a spectacle lens, comprising: In the marking method to the spectacle lens of Claim 1,
The method for marking a spectacle lens, wherein the standard permanent mark or the additional permanent mark is at least one of an alignment reference mark, an abbreviated addition power, and a lens identification mark. In the marking method to the spectacle lens of Claim 1 or 2,
In the additional setting calculation step, the position of the additional permanent mark, which is an alignment reference mark, is calculated and set at a position indicating the horizontal direction of the progressive-power spectacle lens. In the marking method to the spectacle lens of Claim 1 or 2,
The additional setting calculation step calculates and sets the position of an additional permanent mark, which is an alignment reference mark, at a position indicating a vertical line passing through a fitting point of a progressive-power spectacle lens. In the marking method to the spectacle lens as described in any one of Claims 1-4,
The method for marking a spectacle lens, wherein the shape of the additional permanent mark to be marked in the marking step is different from that of the standard permanent mark.   In the marking method to the spectacle lens as described in any one of Claims 1-5, The marking process is a laser marking, The marking method to the spectacle lens characterized by the above-mentioned. In the marking method to the spectacle lens according to any one of claims 1 to 6,
A method for marking a spectacle lens, wherein the spectacle lens is a single-focus spectacle lens instead of a progressive power spectacle lens, and the additional permanent mark is a quality assurance mark. An eyeglass lens characterized in that an additional permanent mark is given by the marking method on the eyeglass lens according to any one of claims 1 to 7.

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