JP2009103795A - Eyeglasses, and method for manufacturing eyeglasses, and system for manufacturing eyeglasses - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide eyeglasses capable of suppressing the degradation in a wearing feel to a wearer. <P>SOLUTION: The eyeglasses are provided with right and left eyeglass lenses. At least the one eyeglass lens of the right and the left eyeglass lenses includes a first face, and a second face on the side opposite to the first face, and includes a first portion having prescribed diopter. The lens includes a third face arranged in part of the circumference of the second face, and includes a second portion having no diopter. The third face is arranged only in the prescribed region of part of the circumference of the second face on the opposite side of the other eyeglass lens with respect to the center of the second face. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to glasses, a method for manufacturing glasses, and a system for manufacturing glasses.

The spectacles include a spectacle lens and a spectacle frame that supports the spectacle lens. The spectacle lens is formed, for example, by processing a semi-finished lens called a semi-finished lens. The semi-finished lens is processed according to a spectacle frame, for example. The following patent document discloses an example of a technique related to a method for manufacturing eyeglasses.
JP 2004-133024 A Japanese Patent Laid-Open No. 2005-189871

  When processing a semi-finished lens, for example, depending on the conditions of the semi-finished lens or the conditions of the spectacle frame, it may be difficult to process the semi-finished lens into a desired shape, or a spectacle lens having a desired shape (appearance) may be used. It may become impossible to manufacture. In that case, for example, the wearing feeling of the glasses for the wearer may be lowered.

  An object of an aspect of the present invention is to provide glasses that can suppress a decrease in wearing feeling. Another object of the present invention is to provide a method for manufacturing spectacles and a system for manufacturing spectacles that can suppress a decrease in wearing feeling.

  According to the first aspect of the present invention, the spectacle lens includes left and right spectacle lenses, wherein at least one spectacle lens of the left and right spectacle lenses includes a first surface and a second surface opposite to the first surface. A first portion having a predetermined power and a second portion including a third surface disposed at a part of the periphery of the second surface and having no power, the third surface being a second surface A pair of spectacles is provided that is arranged only in a predetermined region around the second surface opposite to the other spectacle lens with respect to the center.

  According to a second aspect of the present invention, a spectacle lens is provided with a spectacle lens and worn by a wearer. The spectacle lens includes a first surface and a second surface opposite to the first surface, and a predetermined surface. A first portion having a frequency and a second surface including a third surface disposed at a part of the periphery of the second surface and having no power, and in the worn state, the third surface is the second surface Glasses are provided which are arranged only in a certain predetermined area between the ear and the wearer's ear.

  According to a third aspect of the present invention, there is provided a method of manufacturing spectacles comprising left and right spectacle lenses and worn by a wearer, wherein a first process for generating a semi-finished lens, and processing the semi-finished lens , Including a first surface and a second surface opposite to the first surface, including a first portion having a predetermined frequency and a third surface disposed around a portion of the second surface, and having no frequency A second process for forming at least one of the left and right spectacle lenses including the second part, wherein the second process is based on information on the wearer and information on the semi-finished lens. However, there is provided a method for manufacturing spectacles for processing a semi-finished lens so that the lens is disposed only in a predetermined region around the second surface opposite to the other spectacle lens with respect to the center of the second surface. Is done.

  According to a fourth aspect of the present invention, there is provided a method of manufacturing spectacles comprising a spectacle lens and worn by a wearer, wherein a first process for generating a semi-finished lens, a semi-finished lens is processed, A second surface that includes a first surface and a second surface opposite to the first surface, and includes a first portion having a predetermined power and a third surface disposed at a part of the periphery of the second surface, and has no power. A second process of forming a spectacle lens including a portion, wherein the second process is based on information about the wearer and information about the semi-finished lens, and the third surface is Provided is a method of manufacturing eyeglasses for processing a semi-finished lens so as to be disposed only in a part of a predetermined region between the ears of the wearer.

  According to a fifth aspect of the present invention, there is provided a spectacle manufacturing system that includes left and right spectacle lenses and is worn by a wearer, the first processing device for generating a semi-finished lens, and the processing of the semi-finished lens. The first surface and the second surface opposite to the first surface, including a first portion having a predetermined frequency and a third surface arranged around a portion of the second surface, and having a power A second processing device that forms at least one of the left and right eyeglass lenses including a second portion, wherein the second processing device is based on information about the wearer and information about the semi-finished lens, Manufacture of spectacles for processing a semi-finished lens such that the third surface is arranged only in a predetermined region around the second surface opposite to the other spectacle lens with respect to the center of the second surface A system is provided.

  According to a sixth aspect of the present invention, there is provided a spectacle manufacturing system that includes a spectacle lens and is worn by a wearer, the first processing device for generating a semi-finished lens, and processing the semi-finished lens, A first surface that includes a first surface and a second surface opposite to the first surface, has a first portion having a predetermined frequency, and a third surface disposed around a portion of the second surface, and has no power A second processing device for forming a spectacle lens including two parts, wherein the second processing device is configured so that the third surface is in the wearing state based on the information on the wearer and the information on the semi-finished lens. A spectacles manufacturing system for processing a semi-finished lens is provided so as to be disposed only in a predetermined region between the two surfaces and the wearer's ear.

  According to the aspect of the present invention, it is possible to suppress a decrease in wearing feeling.

  Hereinafter, embodiments of the present invention will be exemplarily described with reference to the drawings, but the present invention is not limited thereto.

  FIG. 1 is a schematic diagram illustrating an example of glasses 1 according to the present embodiment. FIG. 1A is a diagram of glasses 1 viewed from above, and FIG. 1B is a diagram of glasses 1 viewed from the front. It is a figure.

  In FIG. 1, a spectacle 1 includes a spectacle lens 2 and a frame member 3 that supports the spectacle lens 2. The spectacle lens 2 includes left and right spectacle lenses 2A and 2B. The frame member 3 includes a spectacle frame (rim) 4 that supports the spectacle lens 2. The spectacle frame 4 includes spectacle frames 4A and 4B that support the left and right spectacle lenses 2A and 2B, respectively. In the following description, of the two spectacle lenses 2A and 2B, the right (right-eye) spectacle lens 2A is appropriately referred to as a first spectacle lens 2A, and the left (left-eye) spectacle lens 2B is appropriately referred to as a second spectacle lens 2B. This is referred to as a spectacle lens 2B. Of the two spectacle frames 4A and 4B, the spectacle frame 4A supporting the first spectacle lens 2A is appropriately referred to as a first spectacle frame 4A, and the spectacle frame 4B supporting the second spectacle lens 2B is appropriately This will be referred to as two glasses frame 4B.

  The first spectacle lens 2 </ b> A includes a first surface 5 and a second surface 6 opposite to the first surface 5, and is disposed on a first portion 7 having a predetermined power and a part around the second surface 6. The second portion 9 including the third surface 8 and having no frequency is provided. The third surface 8 of the first spectacle lens 2A is around the second surface 6 of the first spectacle lens 2A, opposite to the second spectacle lens 2B with respect to the center of the second surface 6 of the first spectacle lens 2A. It is arranged only in some predetermined areas. The second spectacle lens 2 </ b> B includes a first surface 5 and a second surface 6 opposite to the first surface 5. The second spectacle lens 2 </ b> B is disposed on a first portion 7 having a predetermined power and a part around the second surface 6. The second portion 9 including the third surface 8 and having no frequency is provided. The third surface 8 of the second spectacle lens 2B is around the second surface 6 of the second spectacle lens 2B, opposite to the first spectacle lens 2A with respect to the center of the second surface 6 of the second spectacle lens 2B. It is arranged only in some predetermined areas.

  The first spectacle frame 4A is disposed along the outer periphery of the first spectacle lens 2A. The second spectacle frame 4B is disposed along the outer periphery of the second spectacle lens 2B. That is, the frame member 3 of the present embodiment is a full frame type. The first eyeglass frame 2A and the second eyeglass frame 2B are connected by a bridge 10.

  FIG. 2 is a schematic diagram showing a state where the spectacles 1 are worn by the wearer. FIG. 2A is a view of the spectacles 1 worn by the wearer as viewed from above, and FIG. It is the figure which looked at the spectacles 1 of the wearing state to the wearer from the front.

  As shown in FIG. 2, in the spectacles 1 worn by the wearer, the third surface 8 of the first spectacle lens 2A is one between the second surface 6 of the first spectacle lens 2A and the right ear of the wearer. The third surface 8 of the second spectacle lens 2B is disposed only in a part of the predetermined region between the second surface 6 of the second spectacle lens 2B and the left ear of the wearer. ing.

  As shown in FIG. 2, each of the first spectacle frame 4 </ b> A and the second spectacle frame 4 </ b> B is connected to the temple 12 via a hinge 11.

  The first surface 5 of the spectacle lens 2 is the surface of the spectacle lens 2 and is disposed on the object side. The first surface 5 is a refractive surface disposed on the object side. The second surface 6 of the spectacle lens 2 is the back surface of the spectacle lens 2 and is disposed on the wearer side. The second surface 6 is a refracting surface disposed on the wearer side. The second surface 6 faces the wearer.

  The first surface 5 is a convex surface that protrudes toward the wearer, and the second surface 6 is a concave surface that is recessed relative to the wearer. The first surface 5 is a curved surface having a first curvature, and the second surface 6 is a curved surface having a second curvature. The first curvature is smaller than the curvature of the second surface. That is, the first portion 7 is a concave meniscus lens, and the first surface 5 and the second surface 6 form a concave lens. In other words, the spectacle lens 2 of the present embodiment is a myopia spectacle lens and is a negative lens with a minus power. The center thickness (center thickness) of the spectacle lens 2 is thinner than the edge thickness (edge thickness).

  The third surface 8 is disposed on a part of the periphery of the second surface 6 and is disposed on the wearer side. That is, the third surface 8 faces the wearer. In the present embodiment, the third surface 8 is substantially flat. In the present embodiment, the third surface 8 is mirror-finished and is a mirror surface. The second portion 9 including the third surface 8 is a portion that does not function optically (portion that does not function as a spectacle lens).

  The 3rd surface 8 is arrange | positioned in the position which does not prevent a wearer's suitable visual field in a wearing condition. For example, the first portion 7 that functions as a spectacle lens is provided in a range of at least a radius of 30 mm from the optical center of the spectacle lens 2 toward the ear of the wearer, and the second portion 9 including the third surface 8 includes The first portion 7 is arranged on the ear side.

  The spectacle lens 2 of the present embodiment is a so-called reverse lenticular type lens (blur type lens). The first portion 7 has a frequency, and the second portion 9 arranged in a part around the first portion 7 does not have a frequency. In the spectacle lens 2 of the present embodiment, the second portion 9 is disposed only on the ear side of the wearer and is not disposed on the nose side. Further, the second portion 9 is not disposed on the upper side or the lower side with respect to the pupil position of the wearer. In other words, the second portion 9 is disposed only on the outer side (temple 12) with respect to the optical center of the spectacle lens 2, and is on the inner side (bridge 10 side), upper side, and lower side with respect to the optical center of the spectacle lens 2. Not placed in.

  By making the spectacle lens 2 a spotlight type lens, the edge thickness of the spectacle lens 2 can be reduced even with a strong negative power. Therefore, for example, the spectacle lens 2 can be reduced in weight, and a decrease in wearing feeling can be suppressed. Further, by disposing the third surface 8 only on the ear side of the wearer, it is possible to suppress a decrease in the field of view of the wearer and a decrease in wearing feeling even with a strong minus power. Moreover, it can suppress that an external appearance is impaired by arrange | positioning the 3rd surface 8 only to a wearer's ear | edge side, and can suppress the fall of a wearing feeling.

  As will be described later, in the present embodiment, the spectacle lens 2 is formed by processing a semi-finished lens, and the third surface 8 is on the ear side of the wearer based on information on the wearer and information on the semi-finished lens. It is formed so that it may be arranged only in.

  FIG. 3 is a diagram showing a spectacle lens 2J according to a comparative example. In general, the concave lens (negative lens) 2J is often formed such that the curve (curvature) of the first surface 5J is 0.5 to 2.0. In that case, the curve of the second surface 6J may be loose. For example, as shown in FIG. 3A, in the case where the first surface 5J has two curves and a -8.0D concave lens 2J is formed, the second surface 6J only needs ten curves.

  On the other hand, it may be required to create a concave lens 2J in which the first surface 5J has a 5-8 curve, such as for sunglasses. That is, the first surface 5J may be so-called curve designation (outer shape designation). When the concave lens 2J is formed so as to satisfy the first surface 5J, the curve of the second surface 6J becomes tight. For example, as shown in FIG. 3B, when the first surface 5J has an 8-curve and a -8.0D concave lens 2J is formed, the second surface 6J needs to have a 16 curve. In that case, depending on the processing conditions of the semi-finished lens, as shown in FIG. 3B, there is a high possibility that the third surfaces 8J are formed on both sides with respect to the optical center of the spectacle lens 2J. In that case, for example, the edge thickness of the spectacle lens 2J is increased, the weight is increased, the field of view of the wearer is decreased, and the appearance is impaired, which may cause a decrease in wearing feeling.

  According to the present embodiment, the third surface 8 is disposed only on the ear side of the wearer based on the information about the wearer and the information about the semi-finished lens, so that the first surface 5 and the second surface 6 are Even if the curve is tight, it is possible to prevent the edge thickness of the spectacle lens 2J from increasing, the weight from increasing, the field of view of the wearer from being lowered, and the appearance from being impaired. Therefore, it is possible to suppress a decrease in wearing feeling. Moreover, according to this embodiment, since the 3rd surface 8 is mirror-finished and is a mirror surface, it is suppressed that an external appearance is impaired. Moreover, according to this embodiment, since the 3rd surface 8 is arrange | positioned so that a wearer may be opposed, by dye | staining the spectacle lens 2 or arrange | positioning various functional films, for example The third surface 8 can be made inconspicuous. In the present embodiment, the third surface 8 may be a mat surface, and even in the case of the mat surface, the appearance is prevented from being damaged.

  In the present embodiment, the first surface 5 may be a spherical surface or an aspherical surface. The second surface 6 may be a spherical surface or an aspherical surface. Further, the spectacle lens 2 may be a single focus lens or a progressive focus lens.

  In the present embodiment, the frame member 3 is not limited to the full frame type, and may be, for example, a nyroll type or a two-point type.

  Next, an example of a method for manufacturing the glasses 1 having the above-described configuration will be described with reference to the flowchart of FIG. 4 and schematic diagrams of FIGS. As shown in FIG. 4, the manufacturing method of the eyeglasses 1 according to the present embodiment includes a process of generating the semi-finished lens 13 (step S <b> 1), a process of acquiring information about the wearer, and information about the semi-finished lens 13 ( The first portion 7 and the third surface 8 including the first surface 5 and the second surface 6 are processed by processing the semifinished lens 13 based on the information about the wearer and the information about the semifinished lens 13 in step S2). And a process of forming the spectacle lens 1 having the second portion 9 including (step S3). That is, in the present embodiment, the process of step S3 includes a process of processing the semi-finished lens 13 based on information about the wearer and information about the semi-finished lens 13.

  In the process of step S1, a monomer that is a liquid material for manufacturing the spectacle lens 2 is supplied to the internal space formed by the gasket and the mold member, and the monomer supplied to the internal space is heated. Treatment (polymerization treatment). The monomer includes a thermopolymerizable resin such as diethylene glycol bisallyl carbonate. By polymerizing the monomer, a semi-finished lens 13 is generated as shown in FIG. 5 (step S1). After the semi-finished lens 13 is generated, the gasket and the mold member are removed from the semi-finished lens.

  The shape of the semi-finished lens 13 is circular, and the edge thickness of the semi-finished lens 13 is constant. In the present embodiment, the surface 14 of the semifinished lens 13 that becomes the first surface 5 of the spectacle lens 2 is substantially the first surface 5. That is, before the process of step S3 is completed, the first surface 5 is formed in advance in the process of step S1, and when the process of step S1 is completed, the surface 14 of the semifinished lens 13 is almost finished. In other words, the curvature (shape) of the surface 14 of the semi-finished lens 13 becomes substantially the same as the curvature (shape) of the first surface 5 of the spectacle lens 2 that is the final product when the process of step S1 is completed. Thus, the process of step S1 is executed. Therefore, in this embodiment, in step S3, in order to obtain the desired spectacle lens 2, the side surface 15 and the back surface (prescription surface) 16 of the semifinished lens 13 other than the front surface 14 are processed.

  After the semi-finished lens 13 is generated, processing for processing the semi-finished lens 13 is started. Before starting the processing of the semi-finished lens 13, information on the wearer and information on the semi-finished lens 13 are acquired (step S2).

  The information regarding the wearer is at least one of information regarding spectacle prescription, information regarding the spectacle frame 4 that supports the spectacle lens 2, information regarding the distance between the pupils of the wearer, and information regarding the pupil position in the vertical direction of the wearer. Including one.

  The information regarding the spectacle prescription includes at least one of the power of the spectacle lens 2 required by the wearer, the astigmatic axis, the addition power, and the prism value. The power of the spectacle lens 2 includes at least one of a spherical power and an astigmatic power.

  The information regarding the spectacle frame 4 includes at least one of the shape, size, frame front angle (warp angle), and center position of the spectacle frame 4.

  Information about the semi-finished lens 13 includes the curvature of the front surface 14 of the semi-finished lens 13 serving as the first surface 5, the curvature of the back surface 16A of the semi-finished lens 13 serving as the second surface 6, the center thickness of the semi-finished lens 13, and the edge thickness. , Refractive index, and outer shape. The information regarding the refractive index of the semifinished lens 13 includes information regarding a material used as the semifinished lens 13. Information on the refractive index and the center thickness of the semi-finished lens 13 includes information on a material used as the semi-finished lens 13.

  After the information on the wearer and the information on the semi-finished lens 13 are acquired, the third surface 8 is worn with the second surface 6 based on the acquired information on the wearer and information on the semi-finished lens. A process of processing the semi-finished lens 13 is executed so as to be disposed only in a part of a predetermined region between the person's ears (step S3). The process for processing the semifinished lens 13 includes at least one of a process for cutting at least one of the side surface 15 and the back surface 16 of the semifinished lens 13, a process for grinding, and a process for polishing.

  In the present embodiment, a plurality of semi-finished lenses 13 having different curvatures of the surface 14 are prepared. For example, according to the shape (frame curve) of the spectacle frame 4 used in the information on the wearer, a plurality of semi-finished lenses 13 are prepared. A semi-finished lens 13 having a surface 14 suitable for the shape of the spectacle frame 4 is selected from the semi-finished lenses 13. That is, in the present embodiment, based on information on the wearer (information on the spectacle frame 4) and information on a plurality of semi-finished lenses 13 (information on the curvature of the surface 14 of the semi-finished lens 13), The finish lens 13 is selected. In addition, the information regarding the spectacle frame 4 including the shape, size, frame front angle (warp angle), and center position of the spectacle frame 4 is information according to the wearer's preference.

  Here, a plurality of semi-finished lenses 13 having different curvatures of the surface 14 are prepared, and a predetermined semi-finished lens is selected from among the plurality of semi-finished lenses 13 based on information on the wearer (information on the spectacle frame 4). 13 is selected, of course, based on information on the wearer (information on the spectacle frame 4), processing (cutting) of the surface 14 of the semi-finished lens 13 so as to be the desired first surface 5 Processing, grinding processing, and polishing processing) may be performed.

  In the present embodiment, first, processing for processing the back surface 16 of the semi-finished lens 13 is executed based on information on the wearer and information on the semi-finished lens 13. Here, as the information about the semi-finished lens 13, for example, at least one of the curvature of the surface 14 of the semi-finished lens 13 to be the first surface 5, the refractive index of the semi-finished lens 13, and the center thickness (target center thickness). Information is acquired and used.

  For example, based on information on the wearer, information on spectacle prescription, information on the semi-finished lens 13, information on the refractive index of the semi-finished lens 13, and information on the center thickness (target center thickness), Processing for processing the back surface 16 of the finish lens 13 is executed. For example, a desired second surface 6 (back surface 16A) is obtained according to at least one of the power (spherical power, astigmatism power), astigmatism axis, addition power, and prism value of the spectacle lens 2 required by the wearer. As described above, in consideration of the refractive index of the semifinished lens 13, the back surface 16 of the semifinished lens 13 is processed so that the second surface 6 has a desired curvature and the center thickness of the semifinished lens 13 has a desired value. Is executed. Thereby, as shown in FIG. 6, the semi-finished lens 13 having the second surface 6 (back surface 16A) corresponding to the information about the wearer is generated.

  As described above, the process of processing the back surface 16 of the semi-finished lens 13 is based on the information on the spectacle prescription and the information on the semi-finished lens 13 so that the spectacle lens 2 can obtain a desired optical performance (for example, power). Executed.

  After the back surface 16 of the semi-finished lens 13 is processed to form the second surface 6 (back surface 16A), information about the semi-finished lens 13 is acquired. As information about the semifinished lens 13, for example, the curvature of the front surface 14 of the semifinished lens 13 that becomes the first surface 5, the curvature of the back surface 16A of the semifinished lens 13 that becomes the second surface 6, the center thickness of the semifinished lens 13, At least one of edge thickness, refractive index, and profile is acquired and used.

  Next, processing for processing the side surface 15 of the semifinished lens 13 is executed based on the information about the wearer and the information about the semifinished lens 13 so that the third surface 8 is arranged only on the ear side of the wearer. Is done. In the spectacle lens 2, it is preferable that the optical center of the spectacle lens 2 coincides with the wearer's pupil position. Therefore, the optical center of the spectacle lens 2 coincides with the wearer's pupil position, and the third surface 8 is Among the information on the wearer, for example, information on the wearer's pupillary sensation distance, the wearer so that the eyeglass lens 2 is favorably supported by the spectacle frame 4 without being placed on the nose side. The side surface 15 of the semi-finished lens 13 is processed based on information on the pupil position (eye point) in the top-and-bottom direction (vertical direction), information on the spectacle frame 4, and information on the semi-finished lens 13. Thereby, as shown in FIG. 7, the spectacle lens 2 in which the third surface 8 is disposed only on the ear side of the wearer is formed.

  The semi-finished lens 13 may be processed according to the required edge thickness of the spectacle lens 2. For example, the semi-finished lens 13 may be processed so as to have a desired edge thickness according to the required strength of the spectacle lens 2 with respect to the spectacle frame 4.

  The third surface 8 is processed into a substantially flat surface. Then, the process which mirror-processes the 3rd surface 8 as needed is performed.

  Here, in order to make the explanation easy to understand, the case where the side surface 15 is processed after processing the back surface 16 of the semi-finished lens 13 has been described as an example, but the third surface 8 has a desired size at a desired position. As described above, the processing of the back surface 16 and the processing of the side surface 15 may be performed alternately, or may be performed simultaneously, or after the processing of the side surface 15 is performed, the processing of the back surface 16 may be performed. Good.

  FIG. 8 is a diagram showing an example of the eyeglass lens 2 manufacturing system 20. In FIG. 8, the manufacturing system 20 includes a first processing device 21 that generates the semifinished lens 13 and a second processing device 22 that processes the semifinished lens 13. The 1st processing apparatus 21 produces | generates the semifinished lens 13 using the above-mentioned gasket and mold member. The second processing device 22 includes a cutting device, a grinding device, a polishing device, and the like, and can process the semi-finished lens 13.

  In addition, the manufacturing system 20 includes a first communication device 31 disposed in the spectacle store 30 and a second communication device 23 capable of executing transmission and reception of information. The first communication device 31 and the second communication device 23 are connected via a telecommunication line 24. In other words, the manufacturing system 20 including the first processing device 21 and the second processing device 22 is connected to the spectacle store 30 via the telecommunication line 24 and can transmit and receive information. The communication system 25 including the first communication device 31, the second communication device 23, and the telecommunication line 24 includes, for example, at least one of a telephone system, a facsimile system, and an Internet system.

  The spectacle store 30 transmits information about the wearer to the manufacturing system 20 via the telecommunication line 24. The manufacturing system 20 acquires information about the wearer via the telecommunication line 24.

  The manufacturing system 20 includes a computer system 26, and the third surface 8 is based on information about the wearer acquired through the telecommunication line 24 and information about the semifinished lens 13 acquired from the first processing device 21. However, the processing condition for the semi-finished lens 13 is determined by using the computer system 26 so that it is arranged only in a part of a predetermined region between the second surface 6 and the ear of the wearer. The computer system 26 includes a spectacle lens processing design program, and can perform arithmetic processing based on input information to determine processing conditions for the semi-finished lens 13. The second processing device 22 processes the semi-finished lens 13 based on the determined processing conditions.

  Depending on at least one of the information (condition) about the wearer and the information (condition) about the semi-finished lens 13, the third surface 8 is formed also on the nose side of the wearer, for example, as shown in the schematic diagram of FIG. There is a possibility of being. Further, depending on at least one of the information (condition) about the wearer and the information (condition) about the semi-finished lens 13, the spectacle lens 2 becomes small as shown in the schematic diagram of FIG. As described above, there is a possibility of becoming smaller than the spectacle frame 4. 9A and 10A are schematic views showing the relationship between the spectacle lens 2 and the semi-finished lens 13, and FIGS. 9B and 10B are shown in FIG. ) And a spectacle lens 2 formed from the semi-finished lens 13 shown in FIG. 11A is a view of the frame member 3 that supports the eyeglass lens 2 shown in FIG. 10 as viewed from above, and FIG. 11B is a view of the frame member 3 as viewed from the front.

  As shown in FIG. 9, when the third surface 8 cannot be arranged only in a predetermined area (for example, when the third surface 8 is arranged on the nose side of the wearer), or as shown in FIG. In addition, although the third surface 8 is disposed only in a predetermined region, the spectacle lens 2 cannot be supported by the spectacle frame 4 and, as a result, the third surface 8 cannot be disposed on the ear side of the wearer. Informs the information (impossible information) that the arrangement is impossible. If the computer system 26 determines that the third surface 8 cannot be arranged based on the result of the arithmetic processing, the computer system 26 outputs impossible information to the second communication device 23. The manufacturing system 20 can notify the spectacle store 30 of the impossible information via the telecommunication line 24.

  In the present embodiment, for example, as described with reference to FIG. 6, when the back surface 16 of the semi-finished lens 13 is processed, a process of performing eccentric processing (shift processing) for changing the optical center of the spectacle lens 2 is executed. be able to. The eccentric processing includes a process of changing the shape of the back surface 16A (second surface 6) of the semifinished lens 13. The process of changing the shape of the second surface 6 includes, for example, a process of changing the position of the vertex of the second surface 6, a process of changing the curvature of the second surface 6, and a process of arranging a prism on at least a part of the second surface 6. Including at least one. Then, depending on the result of the eccentric processing, the content of the processing for processing the side surface 15 of the semi-finished lens 13 as described with reference to FIG. 7 can be changed.

  As described above, in the spectacle lens 2, it is preferable that the optical center of the spectacle lens 2 and the pupil position of the wearer coincide with each other. Therefore, by performing the eccentric processing, the optical center of the spectacle lens 2 and the wearer The pupil position can be matched. Then, by changing the content of the processing for processing the side surface 15 according to the result of the eccentric processing, the optical center of the spectacle lens 2 matches the pupil position of the wearer, and the third surface 8 is the nose. The side surface 15 can be processed so as to be disposed only on the ear side without being disposed on the side.

  As described above, according to this embodiment, the spectacle lens 2 can be reduced in weight, the wearer's visual field can be prevented from being lowered, and the appearance can be prevented from being damaged. Therefore, it is possible to suppress a decrease in wearing feeling.

<Example 1>
Hereinafter, an example of a procedure for forming the -8.0D spectacle lens 2 having the first surface 5 of 8 curves using the semi-finished lens 13 having the refractive index nd = 1.67 will be described.

  As shown in FIG. 12, a semi-finish lens 13 for prescription of minus power having a surface 14 having an 8 curve is prepared. In the present embodiment, the outer diameter of the semifinished lens 13 is 75 mm.

Usually, the frame curve is expressed using a refractive index of 1.53. A spectacle lens (plastic lens) having a refractive index of 1.53 and a first surface 5 having an eight curve is equivalent to a spectacle lens having a refractive index of 1.67 and the first surface 5 having a 10.1 curve. That is,
8.0 curve (refractive index 1.53) = 10.1 curve (refractive index 1.67)
It is.

  In order to obtain −8.0D, the curve of the second surface 6 needs to be 18.1 curve. To be precise, the curve of the second surface 6 is obtained in consideration of the center thickness. However, here, the curve value of the first surface 5 and the curve value of the second surface 6 are simplified. The difference is the frequency.

  The center thickness of the semi-finished lens 13 (center thickness in the state shown in FIG. 6) is 1.2 mm. Here, if it is going to make the 2nd surface 6 into 18.1 curve over the whole surface, the edge thickness of the semifinished lens 13 needs at least 20 mm. It is economically disadvantageous to generate the semi-finished lens 13 having such a thick edge thickness, and it takes time to process the back surface 16 of the semi-finished lens 13. Therefore, here, the edge thickness of the semi-finished lens 13 is 5 mm.

  If the second surface 6 (back surface 16A) is formed by processing the back surface 16 of the semifinished lens 13 under such conditions, the third surface 8 is formed as shown in FIG.

As shown in FIG. D. = 64 mm, lateral size inside the eye frame 4 (ball width) = 58 mm, bridge 10 size (mountain width) = 18 mm,
(58+ (18 ÷ 2)) − (64 ÷ 2) = 35
Thus, the spectacle lens 2 must be present within a radius of at least 35 mm from the optical center of the spectacle lens 2 toward the ear of the wearer. Here, if the position and size of the third surface 8 are not adjusted, the third surface 8 remains inside the spectacle frame 4 (within the effective diameter), and as shown in FIG. The thickness is about 7.6 mm.

  In the present embodiment, the third portion 7 (second surface 6) functioning as a spectacle lens is provided in a range of at least 30 mm from the optical center of the spectacle lens 2 toward the ear of the wearer. The position of the surface 8 is determined. Accordingly, as shown in FIG. 16, the edge thickness of the spectacle lens 2 is about 3 mm, and the edge thickness can be reduced by −4.6 mm compared to FIG. Also, the appearance from the side is improved.

<Example 2>
In Example 1, as the information about the wearer, the interpupillary distance P.I. D. = 64 mm, when the lateral size (ball width) of the inside of the eye frame 4 = 62 mm, the size of the bridge 10 (mountain width) = 18 mm,
(62+ (18 ÷ 2)) − (64 ÷ 2) = 39
Thus, the spectacle lens 2 must be present within a radius of at least 39 mm from the optical center of the spectacle lens 2 toward the ear of the wearer.

When the outer diameter of the semi-finished lens 13 is 75 mm, the radius is 37.5 mm. Therefore, for example, as shown in FIG. 17, the spectacle lens 2 is 1.5 mm short in the lateral direction, and the third surface 8 is , It is determined that the arrangement is impossible (cannot be created). When the first surface 5 is a spherical surface, the position of the optical center can be changed. The position of the optical center can be changed by decentering with a prism on the nose side of the spectacle lens 2. For example, as shown in FIG. 18, when the optical center is moved 2.5 mm toward the nose side,
(2.5 [mm] × 8 [D]) ÷ 10 = 2Δ
Accordingly, the prism amount becomes 2Δ, and the position of the third surface 8 changes.

  When the position of the optical center is changed, the first portion 7 (second surface 6) that functions as a spectacle lens is provided in a range of at least 30 mm from the optical center of the spectacle lens 2 toward the ear side of the wearer. In order to maintain the ear side visual field effective range of 30 mm, the position and size of the third surface 8 are readjusted.

  When the position and size of the third surface 8 are readjusted, the position and size of the third surface 8 are readjusted so that the spectacle lens 2 is not insufficient with respect to the spectacle frame 4. In the present embodiment, as shown in FIG. 18, the first portion 7 (second surface 6) that functions as a spectacle lens is in a range larger than 30 mm from the optical center of the spectacle lens 2 toward the ear of the wearer. Is provided. In this way, beveling to accommodate full frame type frame members, grooving to accommodate nyroll type frame members, and drilling to accommodate two point type frame members can be performed. The position and size of the third surface 8 are adjusted so that the required outer shape of the spectacle lens 2 or the required edge thickness of the spectacle lens 2 can be obtained.

It is a figure which shows an example of the spectacles which concern on this embodiment. It is a figure which shows an example of the spectacles of the wearing condition which concerns on this embodiment. It is a schematic diagram which shows an example of the spectacle lens which concerns on a comparative example. It is a flowchart which shows an example of the manufacturing method of the spectacles which concern on this embodiment. It is a schematic diagram for demonstrating an example of the manufacturing method of the spectacles which concerns on this embodiment. It is a schematic diagram for demonstrating an example of the manufacturing method of the spectacles which concerns on this embodiment. It is a schematic diagram for demonstrating an example of the manufacturing method of the spectacles which concerns on this embodiment. It is a schematic diagram which shows an example of the manufacturing system of the spectacles which concerns on this embodiment. It is a schematic diagram which shows an example of the spectacle lens which concerns on a comparative example. It is a schematic diagram which shows an example of the spectacle lens which concerns on a comparative example. It is a schematic diagram which shows an example of the spectacles concerning a comparative example. It is a schematic diagram for demonstrating an example of the manufacturing method of the spectacles which concerns on this embodiment. It is a schematic diagram for demonstrating an example of the manufacturing method of the spectacles which concerns on this embodiment. It is a schematic diagram for demonstrating an example of the manufacturing method of the spectacles which concerns on this embodiment. It is a schematic diagram for demonstrating an example of the manufacturing method of the spectacles which concerns on this embodiment. It is a schematic diagram for demonstrating an example of the manufacturing method of the spectacles which concerns on this embodiment. It is a schematic diagram for demonstrating an example of the manufacturing method of the spectacles which concerns on this embodiment. It is a schematic diagram for demonstrating an example of the manufacturing method of the spectacles which concerns on this embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Eyeglasses, 2 ... Eyeglass lens, 3 ... Frame member, 4 ... Eyeglass frame, 5 ... 1st surface, 6 ... 2nd surface, 7 ... 1st part, 8 ... 3rd surface, 9 ... 2nd part, 10 ... Bridge, 12 ... Temple, 13 ... Semi-finished lens, 14 ... Front, 15 ... Side, 16 ... Back, 20 ... Manufacturing system, 21 ... First processor, 22 ... Second processor, 24 ... Telecommunication line

Claims (31)

Glasses having left and right eyeglass lenses,
At least one of the left and right eyeglass lenses is
A first portion including a first surface and a second surface opposite to the first surface, and having a predetermined frequency;
Including a third surface disposed at a part of the periphery of the second surface, and a second portion having no power,
The third surface is an eyeglass arranged only in a predetermined region around the second surface opposite to the other eyeglass lens with respect to the center of the second surface. A pair of spectacle lenses that are worn by a wearer,
The spectacle lens is
A first portion including a first surface and a second surface opposite to the first surface, and having a predetermined frequency;
Including a third surface disposed at a part of the periphery of the second surface, and a second portion having no power,
In the wearing state, the third surface is a pair of glasses that are arranged only in a predetermined region between the second surface and a wearer's ear.   The glasses according to claim 1, wherein the third surface faces the wearer.   The spectacles according to claim 1, wherein the third surface is substantially flat.   The glasses according to claim 4, wherein the third surface is a mirror surface.   The spectacles according to claim 1, wherein the first surface and the second surface form a concave lens.   The spectacle lens according to claim 1, wherein the spectacle lens includes at least one of a single focus lens and a progressive focus lens. The spectacle lens is formed by processing a semi-finished lens,
The spectacles according to any one of claims 1 to 7, wherein the third surface is formed based on information on a wearer and information on the semi-finished lens. A method of manufacturing eyeglasses comprising left and right eyeglass lenses, worn by a wearer,
A first process for generating a semi-finished lens;
The semi-finished lens is processed to include a first surface and a second surface opposite to the first surface, a first portion having a predetermined power, and a first portion disposed around a portion of the second surface. Forming a spectacle lens of at least one of the left and right spectacle lenses including a second portion including three surfaces and having no power, and
The second process includes
Based on the information on the wearer and the information on the semi-finished lens, the third surface is a part of the periphery of the second surface opposite to the other spectacle lens with respect to the center of the second surface. A method for manufacturing eyeglasses for processing the semi-finished lens so as to be disposed only in a predetermined region. A method of manufacturing spectacles comprising a spectacle lens and worn by a wearer,
A first process for generating a semi-finished lens;
The semi-finished lens is processed to include a first surface and a second surface opposite to the first surface, a first portion having a predetermined power, and a first portion disposed around a portion of the second surface. A second process of forming the spectacle lens including three surfaces and a second part having no power,
The second process includes
Based on the information about the wearer and the information about the semi-finished lens, the third surface is disposed only in a predetermined region between the second surface and the ear of the wearer in the wearing state. Thus, the manufacturing method of the spectacles which processes the said semi-finished lens.   The information related to the wearer includes at least one of information related to spectacle prescription, information related to a spectacle frame that supports the spectacle lens, information related to the interpupillary distance of the wearer, and information related to the pupil position of the wearer. The manufacturing method of 9 or 10.   The manufacturing method according to claim 11, wherein the information related to the spectacle prescription includes at least one of a spherical power, an astigmatism power, an astigmatism axis, an addition power, and a prism value required by the wearer.   The manufacturing method according to claim 11 or 12, wherein the information about the spectacle frame includes at least one of a shape, a size, and a center position of the spectacle frame.   Information on the semi-finished lens includes the curvature of the surface of the semi-finished lens serving as the first surface, the curvature of the back surface of the semi-finished lens serving as the second surface, the center thickness, edge thickness, and refraction of the semi-finished lens. The manufacturing method as described in any one of Claims 9-13 containing at least 1 of a rate and an external shape.   The manufacturing method according to claim 9, wherein when the third surface cannot be arranged only in the predetermined area, the impossibility information is notified.   The manufacturing method according to claim 15, wherein notification is made via a telecommunication line. Including decentration processing for changing the optical center of the spectacle lens,
The manufacturing method according to any one of claims 9 to 16, wherein a content of the second process is changed according to a result of the process for performing the eccentric processing.   The manufacturing method according to claim 9, wherein the third surface is substantially flat.   The manufacturing method according to claim 9, wherein the third surface is mirror-finished.   The manufacturing method according to any one of claims 9 to 19, wherein information about the wearer is acquired through a telecommunication line.   The manufacturing method according to any one of claims 9 to 20, wherein the third surface faces the wearer.   The manufacturing method according to any one of claims 9 to 21, wherein the first surface and the second surface form a concave lens.   The manufacturing method according to any one of claims 9 to 22, wherein the spectacle lens includes at least one of a single focus lens and a progressive focus lens. A system for manufacturing eyeglasses that includes left and right eyeglass lenses and is worn by a wearer,
A first processing device for generating a semi-finished lens;
The semi-finished lens is processed to include a first surface and a second surface opposite to the first surface, a first portion having a predetermined power, and a first portion disposed around a portion of the second surface. A second processing device that forms at least one spectacle lens of the left and right spectacle lenses including three surfaces and a second portion having no power,
The second processing device includes:
Based on the information on the wearer and the information on the semi-finished lens, the third surface is a part of the periphery of the second surface opposite to the other spectacle lens with respect to the center of the second surface. A system for manufacturing eyeglasses for processing the semi-finished lens so as to be arranged only in a predetermined region. A system for manufacturing spectacles that includes a spectacle lens and is worn by a wearer,
A first processing device for generating a semi-finished lens;
The semi-finished lens is processed to include a first surface and a second surface opposite to the first surface, a first portion having a predetermined power, and a first portion disposed around a portion of the second surface. A second processing device for forming the spectacle lens including three surfaces and a second portion having no power, and
The second processing device includes:
Based on the information about the wearer and the information about the semi-finished lens, the third surface is disposed only in a predetermined region between the second surface and the ear of the wearer in the wearing state. Thus, the manufacturing system of the spectacles which processes the said semi-finished lens.   The information related to the wearer includes at least one of information related to spectacle prescription, information related to a spectacle frame that supports the spectacle lens, information related to the interpupillary distance of the wearer, and information related to the pupil position of the wearer. The manufacturing system according to 24 or 25.   Information on the semi-finished lens includes the curvature of the surface of the semi-finished lens serving as the first surface, the curvature of the back surface of the semi-finished lens serving as the second surface, the center thickness, edge thickness, and refraction of the semi-finished lens. 27. The manufacturing system according to claim 24, comprising at least one of a rate and an outer shape.   The manufacturing system according to any one of claims 24 to 27, further comprising a notification device that notifies the impossibility information when the third surface cannot be disposed only in the predetermined region.   29. The manufacturing system according to claim 28, wherein notification is made via a telecommunication line.   30. The manufacturing system according to any one of claims 24 to 29, wherein information relating to the wearer is acquired via a telecommunication line.   The manufacturing system according to any one of claims 24 to 30, wherein the first surface and the second surface form a concave lens.

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