JP4963977B2 - Eyeglass lens manufacturing system and mark detection apparatus - Google Patents

Description

  The present invention relates to a spectacle lens manufacturing system for manufacturing spectacle lenses such as progressive multifocal lenses obtained by processing both lens surfaces, and spectacle lenses such as progressive multifocal lenses obtained by processing one-side lens surfaces, The present invention also relates to a mark detection device for use in the eyeglass lens manufacturing system to detect marks provided at different positions and visibility.

For example, a conventional progressive multifocal lens is cut and polished on the raw lens surface of a semi-finished lens (semi-finished product; one of the convex lens surface and the concave lens surface is processed and the other is an unprocessed lens). It was produced by processing such as. In addition, when the progressive multifocal lens is trimmed, for example, the above-mentioned distance eye is arranged so that the pupil center of the spectacle wearer and the distance eyepoint of the progressive multifocal lens (see reference numeral 116 in FIG. 6) are positioned. Edge trimming is performed with the point as the processing center.
However, the distance eyepoint cannot be displayed directly on the lens surface. Therefore, a reference mark (reference numeral 10 in FIG.
1 and 102) are formed in advance so that the distance eye point and the distance measurement position of the distance portion and the near portion can be derived from the reference mark (see Patent Document 1).

In the semi-finished lens, since the reference mark is already provided on the lens surface (usually the convex lens surface), the concave lens surface is subjected to processing such as cutting and polishing based on the reference mark. Apply processing. Thereafter, based on the reference mark, the addition power (reference numeral 1 in FIG. 6).
14) and an identification mark (see reference numeral 115 in FIG. 6) are imprinted using a laser or the like.

Incidentally, in recent years, progressive multifocal lenses obtained by processing both lens surfaces have been manufactured (see Patent Document 2). The progressive multifocal lens obtained by processing both lens surfaces forms a progressive multifocal lens by integrating the concave lens surface and the convex lens surface. For this reason, when processing such as cutting is performed on one of the concave lens surface and the convex lens surface, and then processing such as cutting is performed on the other, the lens surfaces are positioned so as to be in a desired position. It is necessary to
However, for this positioning, the above-mentioned reference mark cannot be previously applied to the lens use surface. This is because, in the progressive multifocal lens, both lens surfaces are formed by processing, and therefore, even if a reference mark is applied in advance, the reference mark disappears due to processing such as cutting or polishing.

Therefore, in the progressive multifocal lens obtained by processing both lens surfaces, for example, after processing the convex lens surface, a temporary reference mark (see reference numerals 103 to 108 in FIG. 6) is laser-engraved, and based on this temporary reference mark. Thus, the concave lens surface is processed by blocking the convex lens surface. Thereafter, surface treatment is performed, and further, a reference mark, addition power, and identification mark are laser-engraved based on the temporary reference mark.
JP 2002-1638 A International Publication No. WO2006 / 3939A1 Pamphlet

From the above, marking that marks the addition power etc. on the progressive multifocal lens obtained by processing one lens surface, and marks the reference mark and addition power etc. on the progressive multifocal lens obtained by processing both lens surfaces Both these lenses are carried into the process. In the progressive multifocal lens obtained by processing the one-side lens surface, the reference mark is detected as described above in order to mark the addition power and the like. Further, in the progressive multifocal lens obtained by processing both lens surfaces, the temporary reference mark is detected as described above in order to mark the reference mark and the addition power.

  However, the reference mark to be detected and the temporary reference mark are different in position and visibility. For example, the reference mark is formed in a lens use area of a progressive multifocal lens by a method that is difficult to identify with eyes. The temporary reference mark is formed in the lens non-use region of the progressive multifocal lens so that it can be easily identified visually. Therefore, a progressive multifocal lens that is obtained by processing both lens surfaces and is provided with a temporary reference mark is independent of a progressive multifocal lens that is obtained by processing one lens surface and is provided with a reference mark. Therefore, there has been a demand for a system that simplifies the manufacturing process because it must be manufactured on a separate manufacturing line.

  An object of the present invention is made in consideration of the above-described circumstances, and is obtained by processing both lens surfaces, and a spectacle lens such as a progressive multifocal lens to which a temporary reference mark is applied, and a one-side lens surface. An object of the present invention is to provide a spectacle lens manufacturing system capable of easily manufacturing spectacle lenses such as progressive multifocal lenses obtained by processing and provided with reference marks. Another object of the present invention is to provide a mark detection apparatus that can detect a temporary reference mark and a reference mark provided at different positions on a spectacle lens such as a progressive multifocal lens with high accuracy in a short time.

As means for solving the above-mentioned problems, the first means is to manufacture a spectacle lens obtained by processing both lens surfaces and a spectacle lens obtained by processing one lens surface on the same production line. A spectacle lens manufacturing system
In a spectacle lens obtained by processing both lens surfaces, a step of applying a temporary reference mark to a lens non-use area of the processed lens surface after processing one side lens surface of an unprocessed lens in which both lens surfaces are not processed together When,
In a spectacle lens obtained by processing the one-side lens surface, a step of selecting a lens in which a reference mark is previously applied to the lens use area of the processed lens surface in the unprocessed semi-finished lens;
Switching the temporary reference mark detection optical system for detecting the temporary reference mark and the reference mark detection optical system for detecting the reference mark to detect the temporary reference mark or the reference mark; It is the manufacturing system of the spectacle lens characterized by having.
In the spectacle lens obtained by processing the lens surfaces on both sides, the second means detects the temporary reference mark by the temporary reference mark detection optical system, and then, based on the temporary reference mark, the reference mark for the eyeglass lens. Is a spectacle lens manufacturing system according to the first means.
According to a third means, the provisional reference mark is provided so as to be more easily visible than a reference mark for a spectacle lens obtained by processing both lens surfaces. It is a manufacturing system.
According to a fourth means, the reference mark for a spectacle lens obtained by processing the lens surfaces on both sides is applied to a concave shape or a convex shape similar to that of the reference mark for a spectacle lens obtained by processing the one side lens surface. The eyeglass lens manufacturing system according to the second or third means.
According to a fifth means, in the spectacle lens obtained by processing the lens surfaces on both sides, at least one of the addition power and the identification mark is applied in the vicinity of the reference mark for the lens based on the temporary reference mark. A spectacle lens manufacturing system according to any one of the second to fourth means.

  In the spectacle lens obtained by processing the one-side lens surface, the sixth means detects the reference mark by the reference mark detection optical system, and then, based on the reference mark, the addition power is calculated in the vicinity of the reference mark. The eyeglass lens manufacturing system according to any one of the first to fifth means, wherein at least one of the identification marks is provided.

  A seventh means is a spectacle lens manufacturing system according to any one of the first to sixth means, wherein the spectacle lens is a progressive multifocal lens.

According to an eighth means, the spectacle lens has a progressive power action divided and distributed into a first refractive surface that is an object-side surface and a second refractive surface that is an eyeball-side surface, Is a double-sided aspherical progressive addition lens that gives a dioptric power (Df) and an addition power (ADD) based on a prescription value by combining the second refractive surface and the second refractive surface,
The semi-finished lens is a semi-finished lens for a progressive power eyeglass lens in which one surface is an aspherical optical surface imparting progressive refractive action and the other surface is a non-optical surface. A spectacle lens manufacturing system according to any one of the first to seventh means.

A ninth means includes a first optical system for detecting a temporary reference mark applied to a lens non-use region in a spectacle lens obtained by processing both lens surfaces;
A second optical system for detecting a reference mark applied to a lens use region in a spectacle lens obtained by processing an unprocessed one-side lens surface of a semi-finished lens in which only one-side lens surface has been processed;
A mark detection apparatus comprising switching means for switching between the first optical system and the second optical system.

  A tenth means is the mark detecting apparatus according to the ninth means, wherein the spectacle lens is a progressive multifocal lens.

In an eleventh means, the spectacle lens has a progressive power action divided and distributed into a first refractive surface that is an object-side surface and a second refractive surface that is an eyeball-side surface, Is a double-sided aspherical progressive addition lens that gives a dioptric power (Df) and an addition power (ADD) based on a prescription value by combining the second refractive surface and the second refractive surface,
The semi-finished lens is a semi-finished lens for a progressive power eyeglass lens in which one surface is an aspherical optical surface imparting progressive refractive action and the other surface is a non-optical surface. The mark detection apparatus according to the ninth or tenth means.

  According to the first means, the temporary reference mark or the reference mark is switched by switching between the temporary reference mark detection optical system for detecting the temporary reference mark and the reference mark detection optical system for detecting the reference mark. Detected. Since these provisional reference marks and reference marks have different positions and visibility, they are detected with high accuracy by using a dedicated optical system for detecting each mark. Therefore, by switching between the temporary reference mark detection optical system and the reference mark detection optical system and detecting each of the temporary reference mark and the reference mark, these marks can be detected with high precision. A spectacle lens such as a progressive multifocal lens provided with a temporary reference mark and a spectacle lens such as a progressive multifocal lens provided with a reference mark can be easily manufactured.

  According to the first to fourth aspects of the invention, since the reference mark for the progressive multifocal lens obtained by processing both lens surfaces is applied based on the temporary reference mark detected with high accuracy, This reference mark can be applied with high accuracy.

  According to the fifth aspect of the invention, in the progressive multifocal lens obtained by processing the lens surfaces on both sides, at least one of the addition power and the identification mark is applied based on the temporarily detected temporary reference mark. These addition powers and identification marks can be accurately applied in the vicinity of the reference mark.

  According to the invention according to any one of the sixth to eighth means, at least one of the addition power and the identification mark in the progressive multifocal lens obtained by processing the one-side lens surface is accurately detected by the reference mark detection optical system. Therefore, the addition power and the identification mark can be accurately applied in the vicinity of the reference mark.

  According to the invention according to any one of the ninth to eleventh means, the first optical system for detecting a temporary reference mark applied to the progressive multifocal lens obtained by processing both lens surfaces, and the one-side lens surface Is switched by the switching means to the second optical system for detecting the reference mark applied to the progressive multifocal lens obtained by processing Since the provisional reference mark and the reference mark are different in position and visibility, they need to be detected using a dedicated optical system. Therefore, as described above, by switching the optical system by the switching means and detecting each mark, the temporary reference mark and the reference mark can be accurately and shortly used without using each dedicated optical system independently. Can be detected in time.

  The best mode for carrying out the present invention will be described below with reference to the drawings. FIG. 1 is a process diagram showing a manufacturing process performed by a spectacle lens manufacturing system according to an embodiment of the present invention. FIG. 2 is a perspective view showing a mark detection device used in the marking process in FIG. This embodiment is an example when the spectacle lens is a progressive multifocal lens. In the present invention, the spectacle lens is not limited to a progressive multifocal lens, and may be any lens in which at least one engraving is made on the optical surface and a temporary reference position mark is imprinted on the peripheral edge of the lens. Further, it may be a single-focus lens or a spectacle lens having a near-measurement point (for example, a Nurex Lecture addpower, which is a product of HOYA Corporation).

  In the progressive multifocal lens manufacturing system whose manufacturing process is shown in FIG. 1, a progressive multifocal lens 1A (FIG. 6) obtained by processing both lens surfaces and a progressive multifocal lens obtained by processing one lens surface. 1B (FIG. 6) is manufactured on the same manufacturing line. The progressive multifocal lens 1A is manufactured using lens blanks as unprocessed lenses in which both lens surfaces are not processed. The progressive multifocal lens 1B is manufactured using a semi-finished lens in which one of the lens surfaces is processed and the other is not processed.

  As shown in FIG. 6, these progressive multifocal lenses 1A and 1B include fiducial marks 101 and 102, temporary fiducial marks 103, 104, and 105, temporary fiducial marks 106, 107, and 108 required for the manufacturing process. Are formed on, for example, the convex lens surfaces of the progressive multifocal lenses 1A and 1B. In FIG. 6, reference numeral 110 denotes a horizontal reference line, and reference numeral 111 denotes a meridian 111 passing through the geometric center 112 of the progressive multifocal lenses 1A and 1B. Reference numeral 117 is a distance part for viewing a distance, reference numeral 118 is a near part for viewing a distance, and reference numeral 119 is a progressive part whose frequency changes continuously.

The reference marks 101 and 102 are formed on the horizontal reference line 110 at a position a certain distance a (for example, a = 17 mm) from the geometric center 112. The reference marks 101 and 102 are provided in the lens shape 113 of the spectacle frame, that is, in the lens use area. Further, in this lens use region, in the vicinity of the reference marks 101 and 102, an addition power 114 representing the difference between the vertex refractive power of the distance portion 117 and the vertex refractive power of the near portion 118 and an identification representing the type of the lens. A mark 115 is formed.

  The reference marks 101 and 102, the addition power 114, and the identification mark 115 are formed in a concave shape having the same depth or a convex shape having the same height in any of the progressive multifocal lenses 1A and 1B. Thus, it is formed by a method that is difficult to visually identify. As will be described later, in the progressive multifocal lens 1A obtained by processing both lens surfaces, the reference marks 101 and 102, the addition power 114, and the identification mark 115 are imprinted by a laser. Further, in the progressive multifocal lens 1B obtained by processing the lens surface on one side, the reference marks 101 and 102 are formed by being transferred from the molding die when the progressive multifocal lens 1B is molded, and the addition power 114 and the identification mark 115 are formed. Engraved by laser.

  The horizontal reference line 110, the meridian 111, the lens shape 113 of the spectacle frame, the geometric center 112, and the distance eye point 116 to be described later are shown for explanation, and are actually progressive multifocal lenses 1A and 1B. Is not formed. Among these, the geometric center 112 is obtained from the reference marks 101 and 102 formed as described above, and the distance eyepoint is located at a position away from the geometric center 112 by a predetermined distance (for example, 8 to 10 mm). 116 is determined. For example, a processing jig is mounted at the position of the distance eye point 116, and the progressive multifocal lens 1A is set so that the pupil center of the spectacle wearer and the distance eye point 116 of the progressive multifocal lenses 1A and 1B coincide. 1B is trimmed.

  On the other hand, the temporary reference marks 103 to 105 and 106 to 108 are formed only on the progressive multifocal lens 1A obtained by processing both lens surfaces. The temporary reference marks 103 to 105 are formed on the outermost peripheral portion of the progressive multifocal lens 1A. Among these, the temporary reference marks 103 and 105 are provided on the horizontal reference line 110, and the temporary reference mark 104 is provided on the meridian 111. In addition, the temporary reference marks 106 to 108 are formed at positions away from the target lens shape 113 of the spectacle frame by a certain distance. Among these, the temporary reference marks 106 and 108 are provided on the horizontal reference line 110, and the temporary reference mark 107 is provided on the meridian 111, respectively.

  Since these temporary reference marks 103 to 108 are formed in the lens non-use region outside the target lens shape 113 in the spectacle frame, they are easier to see than the reference marks 101 and 102 formed on the progressive multifocal lens 1A. As described above, for example, a laser is used to form a deep concave shape or a high convex shape. Alternatively, the temporary reference marks 103 to 108 may be provided as dark colored marks so that the temporary reference marks 103 to 108 are easier to visually recognize than the reference marks 101 and 102. Accordingly, the temporary reference marks 103 to 108 can be easily identified visually or with an optical instrument. The temporary reference marks 103 to 105 serve as block reference positions for processing one lens surface (for example, a convex lens surface) from a lens blank and then processing the other lens surface (for example, a concave lens surface). Used. The temporary reference marks 106 to 108 are used as marking reference positions for laser marking of the reference marks 101 and 102, the addition power 114 and the identification mark 115 on the progressive multifocal lens 1A.

  Now, a manufacturing procedure of the progressive multifocal lens 1A obtained by processing both lens surfaces will be described below with reference to FIG.

  First, both cylindrical lens blanks are produced with unprocessed cylindrical shapes. (Step S1). Next, blocking (for example, concave lens surface blocking) for processing the other surface, for example, the convex lens surface, is performed on one surface of the lens blank (step S2). Thereafter, using a processing device such as a curve generator, the other surface is cut and ground and polished to form a convex lens surface (step S3).

  Next, temporary reference marks 103 to 108 (FIG. 6) are imprinted on the lens non-use region of the convex lens surface using a laser marking device (step S4). After this marking, the appearance of the processed convex lens surface is inspected, and the convex lens surface power is inspected (step S5). Thereafter, blocking (for example, convex-side lens surface blocking) for processing the one surface of the lens blank, for example, the concave-side lens surface, with respect to the convex-side lens surface is performed using temporary reference marks 103 to 105 (FIG. 6). (Step S6).

  After blocking the convex lens surface, cutting or grinding is performed on the one lens surface using a processing device such as a curve generator, and polishing is performed to form a concave lens surface (step S7). ). Thereafter, the processed concave lens surface is inspected for appearance and the transmittance number is inspected (step S8). After processing both lens surfaces of the progressive multifocal lens 1A as described above, a cured film and an antireflection film are sequentially applied to these both lens surfaces for surface treatment (step S9).

  After this surface treatment, in the marking process, the temporary reference marks 106 to 108 (FIG. 6) of the progressive multifocal lens 1A are detected using the mark detection device 30 (FIG. 2; detailed description later). Next, based on these detected temporary reference marks 106 to 108, the reference marks 101, 102, the addition power 114, and the identification mark 115 are applied to the lens use region on the convex lens surface of the progressive multifocal lens 1A by laser. Marking is performed using the marking device 31 (FIG. 2) (step S10). At this time, the addition power 114 is imprinted in the vicinity of the reference mark 102, and the identification mark 115 is imprinted in the vicinity of the reference mark 101. The addition power 114 may be provided in the vicinity of the reference mark 101 and the identification mark 115 may be provided in the vicinity of the reference mark 102.

  After the marking step, the transmittance number and the like are reinspected (step S11). Thereafter, for example, a processing jig is attached to the distance eye point 116, and edge processing is performed with the distance eye point 116 as a processing center (step S12), and the inspection eye is packed and shipped (step S13).

  Next, a manufacturing procedure of the progressive multifocal lens 1B obtained by processing the one-side lens surface will be described below.

  First, a semi-finished lens in which one of the lens surfaces has been processed and the other is not processed is manufactured using a mold (step S14). At this time, the reference marks 101 and 102 are formed simultaneously with the molding by transferring from the molding die in the lens usage region of the processed lens surface (for example, the convex lens surface).

  Next, blocking (convex side lens surface blocking) for performing processing of the unprocessed concave lens surface is performed on the processed convex lens surface using the reference marks 101 and 102 (FIG. 6). (Step S6). Thereafter, similarly to the case of the progressive multifocal lens 1A obtained by processing both lens surfaces, the formation of the concave lens surface (step S7), the inspection (step S8), and the surface treatment (S9) are sequentially performed.

After the surface treatment, in the marking process, first, the reference marks 101 and 102 of the progressive multifocal lens 1B are detected using the mark detection device 30 (detailed later). Next, based on the detected reference marks 101 and 102, the addition power 114 and the identification mark 115 are imprinted on the lens use region on the convex lens surface of the progressive multifocal lens 1B by using the laser marking device 31. (Step S10). At this time, the addition power 114 is imprinted in the vicinity of the reference mark 102, and the identification mark 115 is imprinted in the vicinity of the reference mark 101. The addition power 114 may be provided in the vicinity of the reference mark 101, and the identification mark 115 may be provided in the vicinity of the reference mark 102.

  After the marking process, shipping inspection (step S11), edge trimming (step S12), and inspection packaging (step S13) are performed in the same manner as in the case of the progressive multifocal lens 1A obtained by processing both lens surfaces. Implement sequentially.

  By the way, as shown in FIGS. 2 to 4, the mark detection device 30 used in the marking process described above detects the temporary reference marks 106 to 108 in the progressive multifocal lens 1 </ b> A as the test lens L, and the test lens. The reference marks 101 and 102 in the progressive multifocal lens 1B as L are detected. The mark detection device 30 includes the illumination optical system 11, the first imaging optical system 12A, the second imaging optical system 12B, the imaging optical system switching unit 23, the lens mounting unit 32, and an image processing unit (not shown). Configured.

  Optical devices such as lenses constituting the illumination optical system 11, the first imaging optical system 12 </ b> A, and the second imaging optical system 12 </ b> B are attached to an optical system support plate 34 erected on the base 33. The illumination optical system 11, the first imaging optical system 12A, and the second imaging optical system 12B use a beam splitter (half mirror) 13, and the optical axis P1 of the illumination optical system 11 and the first imaging optical system 12A. The optical axis P2 of the second imaging optical system 12B is arranged to be the same. Among these, the first imaging optical system 12A and the second imaging optical system 12B are arranged by switching the imaging devices 20A and 20B on the same optical axis P2 by the imaging optical system switching unit 23. It is comprised and is comprised by the same apparatus except imaging device 20A and 20B.

  The illumination optical system 11 includes a light source 14, a condenser lens 15, a pinhole (aperture) 16, a beam splitter 13, objective lenses 17A, 17B, and 17C, imaging lenses 18A and 18B, and a reflective screen 19 on the optical axis P1. Are sequentially arranged. The position where the test lens L is placed is set between the objective lenses 17A, 17B, and 17C and the imaging lenses 18A and 18B. The light source 14, the condenser lens 15, and the pinhole 16 are referred to as a light source unit 14A.

  The light beam emitted from the light source 14 is collected by the condenser lens 15 and passes through the pinhole 16 to become uniform and efficient illumination light. This illumination light is reflected by the beam splitter 13 and enters the objective lenses 17A, 17B, and 17C. Since these objective lenses 17A, 17B, and 17C are disposed so that the focal position thereof is the position of the pinhole 16 in the light source unit 14A as a whole, the objective lenses 17A, 17B, and 17C to the imaging lens 18A, In the range up to 18B, the luminous flux is parallel light whose principal ray is parallel to the optical axis P1 of the illumination optical system 11 (that is, coincident with the optical axes of the objective lenses 17A, 17B, 17C and the imaging lenses 18A, 18B). Become. The parallel illumination light is irradiated onto the test lens L, and the light beam emitted from the test lens L reaches the reflection type screen 19 through the imaging lenses 18A and 18B, and the temporary reference marks 106 to 108 and the reference mark. An image of the test lens L including 101 and 102 is projected onto the reflective screen 19.

  The first imaging optical system 12A and the second imaging optical system 12B have a reflection type screen 19, imaging lenses 18A and 18B, objective lenses 17A, 17B and 17C, a beam splitter 13 and a CCD camera on the optical axis P2. Imaging devices 20A and 20B are sequentially arranged. A position where the test lens L is placed is set between the imaging lenses 18A and 18B and the objective lenses 17A, 17B, and 17C.

In the imaging devices 20A and 20B, the optical diaphragm surface (not shown) of the imaging lens built in the imaging devices 20A and 20B is arranged at the focal point of the entire objective lens 17A, 17B, and 17C. Thus, in the range from the objective lenses 17A, 17B, and 17C to the imaging lenses 18A and 18B, the principal ray is the optical axis P2 of the first and second imaging optical systems 12A and 12B (that is, the objective lenses 17A and 17B). 17B, 17C and the optical axes of the imaging lenses 18A, 18B). With this arrangement, the light receiving surfaces (for example, CCD element surfaces) of the imaging devices 20A and 20B and the reflective screen 19 become conjugate, and the image of the lens L projected onto the reflective screen 19 is reflected to form the imaging lens 18A. , 18B, passes through the test lens L and the objective lenses 17A, 17B, 17C, and forms an image on the light receiving surfaces of the imaging devices 20A, 20B.

  The light source 14 emits, for example, red light or near infrared light in order to obtain a sharp image by properly projecting the marks such as the temporary reference marks 106 to 108 and the reference marks 101 and 102 of the lens L. LEDs are used. Further, the beam splitter 13 having a transmittance / reflectance ratio of, for example, 7: 3 is used. Further, the reflection type screen 19 is configured by attaching a reflection sheet coated with fine particles such as glass and aluminum in order to increase the reflectance. The reflective screen 19 is rotated at a high speed (for example, 3400 rpm) by the motor 21 in order to make the surface brightness and background uniform, and reflects the image of the lens L in this state.

  The imaging lenses 18A and 18B are lenses (convex lenses) having a positive focal length, and are disposed between the mounting position of the lens L and the reflective screen 19 as described above. The imaging lenses 18 </ b> A and 18 </ b> B have a function of collecting the light beam that has passed through the test lens L and projecting it on the reflection type screen 19. The reflection type screen 19 reflects the image of the test lens L, passes the test lens L, and takes it into the imaging device 20A or 20B.

  As described above, the image of the test lens L captured and captured by the imaging devices 20A and 20B is captured by an image processing unit (not shown), subjected to image processing by a technique such as pattern matching, and the temporary reference mark 106 on the image. ˜108, the positions of the reference marks 101 and 102 are detected by the image processing unit. From the detected positions of the temporary reference marks 106 to 108, the positions of the temporary reference marks 101 and 102, the addition power 114, and the identification mark 115 to be engraved in the progressive multifocal lens 1A obtained by processing both lens surfaces are obtained. It is done. Further, from the detected positions of the reference marks 101 and 102, the addition power 114 and the position where the identification mark 115 is to be engraved in the progressive multifocal lens 1B obtained by processing the one-side lens surface are obtained.

  The lens mounting portion 32 shown in FIGS. 2 to 4 is installed on a cylindrical body 40 attached to a base 33. The lens mounting portion 32 includes a lens support tube 41 fixed to the upper imaging lens 18A of the two imaging lenses 18A and 18B, and a mirror for mounting the two imaging lenses 18A and 18B. The cylinder 42 includes a vacuum pump (not shown) connected to a space surrounded by the two imaging lenses 18A and 18B and the lens barrel 42. The upper imaging lens 18A has a through hole 43 in communication with the lens support tube 41 at the center position. Accordingly, when the vacuum pump is activated, the inside of the lens support cylinder 41 becomes negative pressure through the space surrounded by the imaging lenses 18A and 18B and the lens barrel 42, and the negative pressure causes the lens support cylinder 41 to move to the lens support cylinder 41. The central portion of the test lens L is sucked and held.

  As described above, the imaging optical system switching unit 23 switches and arranges the imaging device 20A of the first imaging optical system 12A and the imaging device 20B of the second imaging optical system 12B on the optical axis P2. And a guide rail 45, a movable plate 46, a screw 47 such as a ball screw, a drive motor 48, and a control device 49.

The guide rail 45 extends in the horizontal direction above the optical system support plate 34. Further, the imaging devices 20A and 20B are arranged in parallel on the movable plate 46. The slider 50 attached to the movable plate 46 is fitted to the guide rail 45, and the movable plate 46 is provided so as to be slidable in the horizontal direction along the guide rail 45. A screw 47 and a drive motor 48 are also installed on the optical system support plate 34, and the screw 47 is rotationally driven by the drive motor 48. The screw 47 extends in the horizontal direction. The operating arm 51 fixed to the movable plate 46 is screwed onto the screw 47.

  Accordingly, the drive plate 48 moves the movable plate 46 in the horizontal direction via the screw 47 and the operating arm 51, and the imaging devices 20A and 20B are positioned at predetermined positions where the respective optical axes coincide with the optical axis P2. It is done. The control device 49 controls the drive motor 48 so that the imaging device 20A and the imaging device 20B are positioned at the predetermined positions, respectively. Instead of the screw 47 and the drive motor 48, the movable plate 46 may be moved in the horizontal direction using another drive source such as a cylinder.

  The first imaging optical system 12A is configured by positioning the imaging device 20A on the optical axis P2 by the imaging optical system switching unit 23, and the second imaging optical system 12B is configured by positioning the imaging device 20B on the optical axis P2. The The imaging devices 20A and 20B differ in imaging magnification and imaging field of view. That is, the imaging device 20A is for imaging the temporary reference marks 106 to 108 (FIG. 6) of the progressive multifocal lens 1A obtained by processing both lens surfaces. The imaging device 20B is for imaging the reference marks 101 and 102 (FIG. 6) of the progressive multifocal lens 1B obtained by processing the one-side lens surface.

  More specifically, the temporary reference marks 106 to 108 of the progressive multifocal lens 1A obtained by processing both lens surfaces are located at predetermined positions outside the lens shape 113 of the spectacle frame and can be easily identified visually. Is provided. In order to image these temporary reference marks 106 to 108, the imaging field of view 52 is not widened optically, and the imaging visual field 52 is in a wide range where the temporary reference marks 106 to 108 can be imaged as shown in FIG. An imaging device 20A to be set is used. Accordingly, the first imaging optical system 12A including the imaging device 20A can clearly and reliably detect the temporary reference marks 106 to 108 in the progressive multifocal lens 1A obtained by processing both lens surfaces. That is, the first imaging optical system 12A functions as a temporary reference mark detection optical system.

  On the other hand, since the reference marks 101 and 102 of the progressive multifocal lens 1B obtained by processing the one-side lens surface are at a fixed distance a from the geometric center 112 and are on the lens use surface, it is difficult to easily identify them visually. It is formed as follows. In order to image these reference marks 101 and 102, the imaging magnification is increased and optically enlarged to clearly image these reference marks 101 and 102, and the imaging field 53 is as shown in FIG. In addition, an imaging device 20B that sets a narrow range in which the reference marks 101 and 102 can be imaged is used. Therefore, the second imaging optical system 12B including the imaging device 20B can clearly and reliably detect the reference marks 101 and 102 in the progressive multifocal lens 1B obtained by processing the one-side lens surface. That is, the second imaging optical system 12B functions as a reference mark detection optical system.

  In the marking process (step S10 in FIG. 1) performed using the mark detection device 30 configured as described above, when the progressive multifocal lens 1A obtained by processing both lens surfaces is loaded, the mark detection device The imaging device 20A is positioned on the optical axis P2 by the imaging optical system switching unit 30 of 30 and the first imaging optical system 12A is selected. The temporary reference mark 106 of the progressive multifocal lens 1A is selected by the first imaging optical system 12A. ~ 108 are detected. In the marking step, when the progressive multifocal lens 1B obtained by processing the one-side lens surface is carried in, the imaging device 20B is positioned on the optical axis P2 by the imaging optical system switching unit 23 of the mark detection device 30. The second imaging optical system 12B is selected, and the second imaging optical system 12B detects the reference marks 101 and 102 of the progressive multifocal lens 1B.

With the configuration as described above, the following effects (1) to (3) are achieved according to the above embodiment.
(1) The mark detection device 30 processes the first imaging optical system 12A for detecting the temporary reference marks 106 to 108 of the progressive multifocal lens 1A obtained by processing both lens surfaces and the one-side lens surface. The second imaging optical system 12B for detecting the reference marks 101 and 102 of the obtained progressive multifocal lens 1B is switched by the imaging optical system switching unit 23, and the temporary reference marks 106 to 108 or the reference marks 101 and 102 are switched. Detected. Since these temporary reference marks 106 to 108 and the reference marks 101 and 102 have different positions and visibility, a dedicated optical system (the first imaging optical system 12A, the first imaging system) for detecting each mark is used. By using the two imaging optical system 12B), it is detected with high accuracy. Therefore, in the mark detection device 30, the first imaging optical system 12A and the second imaging optical system 12B are switched by the imaging optical system switching unit 23, and the temporary reference marks 106 to 108 of the progressive multifocal lens 1A and the progressive multifocus. By detecting the reference marks 101 and 102 of the lens 1B, these marks (temporary reference marks 106) can be used without using the first imaging optical system 12A and the second imaging optical system 12B independently.
˜108, the reference marks 101 and 102) can be detected with high accuracy in a short time. As a result,
In the same production line, the progressive multifocal lens 1A to which the temporary reference marks 106 to 108 are applied and the progressive multifocal lens 1B to which the reference marks 101 and 102 are applied can be easily manufactured.

  (2) The reference marks 101 and 102, the addition power 114, and the identification mark 115 of the progressive multifocal lens 1A obtained by processing both lens surfaces were detected with high accuracy by the first imaging optical system 12A of the mark detection device 30. Based on the temporary reference marks 106 to 108, the laser marking device 31 applies them. Accordingly, the reference marks 101 and 102, the addition power 114, and the identification mark 115 can be efficiently and accurately marked in a short time using the laser marking device 31.

  (3) The addition power 114 and the identification mark 115 in the progressive multifocal lens 1B obtained by processing the one-side lens surface are the reference marks 101 and 102 detected with high accuracy by the second imaging optical system 12B of the mark detection device 30. Based on the laser marking device 31. Therefore, the addition power 114 and the identification mark 115 can be efficiently and accurately marked in a short time using the laser marking device 31.

The above embodiment is a case where the spectacle lens is a progressive multifocal lens. However, the present invention is not limited to this. For example, the spectacle lens obtained by processing both lens surfaces is a single focus lens. The present invention can also be applied to a case where the spectacle lens obtained by processing the one-side lens surface is a progressive multifocal lens, or vice versa, or even both are single-focus lenses. In any case, in the case of a spectacle lens obtained by processing both lens surfaces, after processing one lens surface of an unprocessed lens in which both lens surfaces are not processed, the lens of the processed lens surface is not processed. A step of applying a temporary reference mark to the use area; Further, in the case of a spectacle lens obtained by processing the one-side lens surface, there is a step of selecting a lens in which a reference mark is preliminarily applied to the lens use area of the processed lens surface in the unfinished semi-finished lens. Then, the temporary reference mark is detected by the temporary reference mark detection optical system for detecting the temporary reference mark, and the reference mark or the quality assurance mark is placed at a predetermined position based on the temporary reference mark. A step of applying to a use area of the lens. If the temporary reference mark cannot be detected, the temporary reference mark detection optical system for detecting the temporary reference mark is switched to the reference mark detection optical system for detecting the reference mark. Alternatively, it includes a step of detecting a quality assurance mark or the like. FIG. 7 shows a single focus lens 2A with provisional reference marks 203, 204, and 205 attached thereto. FIG. 8 shows a single focus lens 2B to which a quality assurance mark 214 is attached. In FIG. 7, reference numeral 2
An area indicated by 52 is an imaging visual field area, and an area indicated by reference numeral 253 in FIG. 8 is an imaging visual field area.

  As described above, the present invention is also suitable for a case where lenses having different positions, types, and numbers of markings are handled in a mixed manner, such as single focus lenses and progressive power lenses (multifocal lenses). For example, a single-focus lens has a small amount of information such as layout and optical performance values, and has a small number of marking types and number of markings (for example, a single-focus lens may have only one quality assurance mark). On the other hand, a progressive-power lens has a large amount of information and the number of marks, and generally has a complicated mark compared to a single focus lens. The optical performance value related information of the single focus lens includes, for example, an average refractive power, an astigmatic refractive power, a design type indicating a spherical surface or an aspherical surface, a refractive index, and the like. The layout related information includes, for example, an optical center, a geometric center, and an astigmatic axis direction. On the other hand, in the progressive addition lens, in addition to the case of the single focus lens, the optical performance value includes, for example, near refractive power, far refractive power, addition power, progressive band length, inset amount, right and left division, etc. is there. Further, the layout-related information includes, for example, a near refractive power measurement position, a far refractive power measurement position, a prism amount measurement position, a left / right identification display (including ear and nose side identification displays), an alignment reference position, and the like. .

  In order to display the above information, the marking position is 17 mm or 22 mm from the optical center in a 45 degree direction on the ear side with respect to the horizontal center line of the wearing state of the spectacle lens, for example, at a single focal point. It is imprinted at a position some distance away. In the progressive-power lens, the alignment reference position is engraved at a position 17 mm away from the prism measurement position on the horizontal center line. Further, in the progressive-power lens, optical performance related information and other lens related information are imprinted in the vicinity of the alignment reference position. Layout related information is also displayed. Therefore, in the past, when a progressive addition lens and a single focus lens engraved with the above related information are mixedly handled, the engraving position and the details of the engraving are diverse. In general, a power lens is provided by installing a production line independently. The present invention can be carried out on the same production line even in such a case.

It is process drawing which shows the manufacturing process which one embodiment in the manufacturing system of the progressive multifocal lens which concerns on this invention implements. It is a perspective view which shows the mark detection apparatus used for the marking process in FIG. It is a front view which shows the mark detection apparatus of FIG. It is a side view which shows the mark detection apparatus of FIG. It is a top view which shows each visual field of the imaging device of the 1st imaging optical system in the mark detection apparatus of FIG. 2, and the imaging device of a 2nd imaging optical system with a progressive multifocal lens. It is a top view which shows the progressive multifocal lens in which the temporary reference mark, the reference mark, etc. were given. It is a figure which shows the single focus lens 2A to which the temporary reference marks 203, 204, and 205 were attached. It is a figure which shows the single focus lens 2B to which the quality assurance mark 214 was attached | subjected.

Explanation of symbols

1A, 1B Progressive multifocal lens 12A First imaging optical system (temporary reference mark detection optical system, first optical system)
12B Second imaging optical system (reference mark detection optical system, second optical system)
20A, 20B Imaging device 23 Imaging optical system switching unit (switching means)
DESCRIPTION OF SYMBOLS 30 Mark detection apparatus 31 Laser marking apparatus 32 Lens mounting part 52, 53 Imaging visual field 101, 102 Reference mark 103, 104, 105 Temporary reference mark 106, 107, 108 Temporary reference mark 113 Eyeglass frame shape 114 Addition power 115 Identifying mark

Claims (11)

A spectacle lens manufacturing system for manufacturing a spectacle lens obtained by processing both lens surfaces and a spectacle lens obtained by processing one lens surface on the same manufacturing line,
In a spectacle lens obtained by processing both lens surfaces, a step of applying a temporary reference mark to a lens non-use area of the processed lens surface after processing one side lens surface of an unprocessed lens in which both lens surfaces are not processed together When,
In a spectacle lens obtained by processing the one-side lens surface, a step of selecting a lens in which a reference mark is previously applied to the lens use area of the processed lens surface in the unprocessed semi-finished lens;
Switching the temporary reference mark detection optical system for detecting the temporary reference mark and the reference mark detection optical system for detecting the reference mark to detect the temporary reference mark or the reference mark; An eyeglass lens manufacturing system comprising:   In the spectacle lens obtained by processing the lens surfaces on both sides, after the temporary reference mark is detected by the temporary reference mark detection optical system, the reference mark for the spectacle lens is changed to the lens of the lens based on the temporary reference mark. The spectacle lens manufacturing system according to claim 1, wherein the spectacle lens manufacturing system is applied to a use region.   3. The spectacle lens manufacturing system according to claim 2, wherein the temporary reference mark is provided so as to be more easily visible than a reference mark for a spectacle lens obtained by processing both lens surfaces.   The reference mark for a spectacle lens obtained by processing the lens surfaces on both sides is provided with a concave shape or a convex shape similar to the reference mark for a spectacle lens obtained by processing a lens surface on one side. The spectacle lens manufacturing system according to claim 2 or 3.   5. The spectacle lens obtained by processing the lens surfaces on both sides, wherein at least one of an addition power and an identification mark is provided in the vicinity of a reference mark for the lens based on the temporary reference mark. A spectacle lens manufacturing system according to any one of the above.   In the spectacle lens obtained by processing the one-side lens surface, after the reference mark is detected by the reference mark detection optical system, at least one of the addition power and the identification mark is provided in the vicinity of the reference mark based on the reference mark. 6. The spectacle lens manufacturing system according to claim 1, wherein the spectacle lens manufacturing system is applied.   The spectacle lens manufacturing system according to claim 1, wherein the spectacle lens is a progressive multifocal lens. The spectacle lens has a progressive power action divided and distributed into a first refractive surface that is an object-side surface and a second refractive surface that is an eyeball-side surface, and the first and second refractive surfaces Is a double-sided aspherical progressive addition lens that gives a dioptric power (Df) and an addition power (ADD) based on a prescription value,
The semi-finished lens is a semi-finished lens for a progressive-power spectacle lens in which one surface is an aspherical optical surface that imparts progressive refractive action and the other surface is a non-optical surface. Item 8. The eyeglass lens manufacturing system according to any one of Items 1 to 7. A first optical system for detecting a temporary reference mark applied to a lens non-use region in a spectacle lens obtained by processing both lens surfaces;
A second optical system for detecting a reference mark applied to a lens use region in a spectacle lens obtained by processing an unprocessed one-side lens surface of a semi-finished lens in which only one-side lens surface has been processed;
A mark detection apparatus comprising switching means for switching between the first optical system and the second optical system.   The mark detection apparatus according to claim 9, wherein the spectacle lens is a progressive multifocal lens. The spectacle lens has a progressive power action divided and distributed into a first refractive surface that is an object-side surface and a second refractive surface that is an eyeball-side surface, and the first and second refractive surfaces Is a double-sided aspherical progressive addition lens that gives a dioptric power (Df) and an addition power (ADD) based on a prescription value,
The semi-finished lens is a semi-finished lens for a progressive-power spectacle lens in which one surface is an aspherical optical surface that imparts progressive refractive action and the other surface is a non-optical surface. Item 11. The mark detection device according to any one of Items 9 to 10.

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