JP2018036488A - Blocking ring, blocking ring manufacturing method, and spectacle lens manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a blocking ring capable of suppressing thickening of an edge portion of a frame-shaped lens. SOLUTION: A blocking ring 100 for injecting a bonding material between one lens surface of a lens blank LB and a fixing jig 111 for processing, and an inner peripheral surface of the blocking ring 100 has a frame shape. It is formed in a circular shape or a non-circular shape that matches the outer circumference of the lens FL. [Selection diagram] Fig. 1

Description

  The present invention relates to a blocking ring, a method for manufacturing a blocking ring, and a method for manufacturing a spectacle lens.

  In the spectacle lens manufacturing process, there is a process of cutting and polishing a lens blank such as a semi-finished product lens (semi-finished lens) in accordance with the wearer's prescription (for example, see Patent Document 1 below). The semi-finished lens usually has a convex lens surface that has been optically designed in advance, and the lens surface on the opposite side is the object of cutting and polishing. Prior to cutting and polishing, the semi-finished lens is subjected to a blocking process in which a fixing jig is bonded to a convex lens surface with an alloy (low melting point alloy) which is one of bonding materials. The semi-finished lens is cut and polished while being supported via a fixing jig.

  In order to bond a lens blank such as a semi-finished lens and a fixing jig, an annular blocking ring is disposed between the lens surface and the fixing jig, and these three members, that is, the lens surface and the fixing jig are fixed. This is done by filling the space formed between the tool and the blocking ring with alloy.

JP 2008-110476 A

  According to the first aspect of the present invention, a blocking ring for injecting a bonding material between one lens surface of a lens blank and a processing fixture, wherein the inner peripheral surface of the blocking ring is A blocking ring formed in a circular shape or a non-circular shape that matches the outer periphery of the frame-shaped lens is provided.

  According to the second aspect of the present invention, there is provided a method for manufacturing a blocking ring for injecting a bonding material between one lens surface of a lens blank and a fixing jig for processing. A method for manufacturing a blocking ring, comprising: setting a shape of a peripheral surface to a circular shape or a non-circular shape according to an outer periphery of a frame-shaped lens; and forming an inner peripheral surface to be a set shape. Is provided.

  According to the third aspect of the present invention, a lens blank is manufactured, a blocking ring is manufactured by the manufacturing method of the blocking ring according to the second aspect of the present invention, and the lens surface of the lens blank and the fixing jig Placing a blocking ring between them, injecting a bonding material inside the blocking ring to fix the fixing jig to the lens blank, and processing the lens blank using the fixing jig, A method of manufacturing a spectacle lens is provided.

An example of the blocking ring which concerns on 1st Embodiment is shown, (A) is a top view, (B) is sectional drawing along the AA in (A), (C) is a perspective view. It is a figure which shows the example which decenters from the geometric center of a lens blank, and arrange | positions the geometric center of a fixing jig the optical center of a lens blank. It is the figure which showed the positional relationship of the lens blank of an eccentric lens, its geometrical center, an optical center, and an elliptical intermediate lens. An example of the blocking ring which concerns on 2nd Embodiment is shown, (A) is a top view, (B) is sectional drawing along the BB line in (A), (C) is a perspective view. (A) is a figure which shows an example of the blocking ring which concerns on 3rd Embodiment, (B) is a figure which shows an example of the blocking ring which concerns on 4th Embodiment. (A) is a figure which shows an example of the blocking ring which concerns on 5th Embodiment, (B) is a figure which shows an example of the blocking ring which concerns on 6th Embodiment. It is a figure which shows an example of the blocking ring which concerns on 7th Embodiment. An example of the blocking ring which concerns on 8th Embodiment is shown, (A) is a top view, (B) is sectional drawing along CC line in (A). It is a flowchart which shows a part of manufacturing method of the blocking ring which concerns on this embodiment. (A) And (B) is a flowchart which shows a part of manufacturing method of the blocking ring which concerns on this embodiment. (A) is a flowchart which shows a part of manufacturing method of the blocking ring which concerns on this embodiment, (B) is a figure which shows the manufacturing process of a blocking ring. It is a flowchart which shows an example of the manufacturing method of the spectacle lens which concerns on this embodiment. (A) is a flowchart which shows a part of manufacturing method of the spectacle lens based on this embodiment, (B) is a figure which shows an example of the manufacturing process of a spectacle lens. (A)-(D) are figures which show an example of the manufacture process of the spectacle lens which concerns on this embodiment. (A) And (D) is a figure which shows an example of the manufacture process of the spectacles lens which concerns on this embodiment. It is a flowchart which shows the other example of the manufacturing method of the spectacle lens which concerns on this embodiment. (A)-(C) are figures which show an example of the manufacture process of an eyeglass lens. (A)-(C) are figures which show an example of the manufacture process of an eyeglass lens. It is a figure which shows the other example of the manufacturing method of a blocking ring.

  Hereinafter, embodiments will be described with reference to the drawings. However, the present invention is not limited to this. In this embodiment, a spectacle lens manufactured by cutting and polishing the opposite surface of a lens blank (semi-finished lens) having a convex surface that has been optically designed in advance is described. The present invention can also be applied to a spectacle lens manufactured by cutting and polishing both surfaces of a lens blank that has not been subjected to. Furthermore, although the method of bonding the lens blank and the fixing jig is also described using an alloy, a method other than the alloy, for example, using an ultraviolet curable resin as a bonding material, the lens surface, the fixing jig, and the blocking ring Alternatively, a method may be used in which a space formed therebetween is filled with an ultraviolet curable resin and adhered by irradiating with ultraviolet rays. In the drawings, in order to describe the embodiment, the scale may be changed as appropriate, for example, a part of the drawing may be enlarged or emphasized.

  The lens blank is generally a circular shape having an outer diameter of about φ70 to 85 mm and is formed as a lens having a considerable thickness. When the lens blank is cut and polished, the lens blank may be processed in a circular shape of about φ70 to 85 mm, but may be cut and polished after being cut into a smaller circular or elliptical intermediate lens. When polishing an intermediate lens, if the edge thickness of the lens becomes too thin, the polishing pad is easily damaged, and as a result, the life of the polishing pad is shortened. Therefore, in order to reduce the burden on the polishing pad, it is necessary to secure a certain amount of lens edge thickness. When the prescription lens is a plus lens, it is necessary to ensure a certain amount of edge thickness with an outer diameter of φ70 to 85 mm when the lens blank is directly ground and polished. The center thickness and edge thickness of the film become thick. By passing through a circular or elliptical intermediate lens smaller than the lens blank, there is an effect that the thickness of the plus lens can be made thinner. Therefore, the diameter of the intermediate lens can be further reduced from the viewpoint of reducing the thickness of the plus lens.

  On the other hand, the diameter of the alloy is set according to the inner diameter of the blocking ring. As the blocking ring, a plurality of blocking rings having different inner diameters are prepared in advance, and are appropriately selected from these. The blocking ring is usually circular, and a blocking ring having a large inner diameter is selected so that the fixing jig does not fall off from the lens surface during grinding and polishing.

  By the way, the shape of the intermediate lens must include a frame shape and a circular shape filled with an alloy. If the alloy protrudes outside the intermediate lens shape, the alloy is processed during cutting and polishing, and the alloy cannot be regenerated. Therefore, when a conventional circular blocking ring is used, there is a limit to reducing the shape of the intermediate lens, and the center thickness and edge thickness of the lens that has been processed into a lens shape will eventually increase. There's a problem.

  Therefore, in the present embodiment, the blocking ring and the blocking that can suppress the increase of the intermediate lens and the edge of the frame-shaped lens can be suppressed by using a blocking ring corresponding to the frame-shaped lens. A method for manufacturing a ring and a method for manufacturing a spectacle lens are provided.

<First Embodiment>
FIG. 1 is a diagram illustrating an example of a blocking ring according to the first embodiment. 1A is a plan view, FIG. 1B is a cross-sectional view taken along line AA in FIG. 1A, and FIG. 1C is a perspective view.

  As shown in FIGS. 1A to 1C, when the blocking ring 100 processes the circular lens blank LB or the elliptical intermediate lens LB1, one of the intermediate lenses LB1 (or the lens blank LB) is processed. It is used to inject an alloy as a bonding material between the lens surface L1 and the processing fixture 111. In the following description, the lens blank LB is used to include a semi-finished lens. 1A to 1C, in order to compare the shape and dimensions with the blocking ring 100, a fixing jig 111, a frame-shaped lens FL, a lens blank LB, The intermediate lens LB1 is indicated by a one-dot chain line. The fixing jig 111 is a so-called Yatoi or the like, and is a truncated cone-shaped member. Here, a case where the fixing jig 111, the frame-shaped lens FL, and the lens blank LB are arranged so that their geometric centers (center axes in the direction perpendicular to the paper surface) coincide is shown as an example. The geometric center (frame center) does not necessarily coincide with the geometric center or optical center of the lens blank LB due to the fitting information of the wearer and the frame shape information.

  In addition, the optical center (OC) of the lens blank LB may be designed eccentrically at a position several mm away from the geometric center (GC). As described above, when the position of the geometric center of the lens blank LB is different from the position of the optical center, the geometric center (center axis) of the fixing jig 111 is the geometric center (GC) or the optical center (OC) of the lens blank LB. Generally, it is arranged so as to coincide with any of the above. FIG. 2 is a diagram illustrating an example in which the geometric center of the fixing jig 111 is decentered from the geometric center of the lens blank LB so as to coincide with the optical center of the lens blank LB. As shown in FIG. 2, the optical center FOC of the frame-shaped lens FL (coincident with the optical center (OC) of the lens blank LB) is the geometric center of the lens blank LB so that the frame-shaped lens FL can be taken even with a small lens blank shape. It may be designed at a position that is intentionally shifted from the GC by several mm in advance. For example, in FIG. 2A, when the geometric center GC of the lens blank LB and the optical center OC are made coincident with each other, a portion where the frame-shaped lens FL cannot be removed is generated. In such a case, as shown in FIG. 2B, the frame-shaped lens FL can be formed even with a small lens blank by designing the optical center OC of the lens blank LB with a few mm deviation from the geometric center GC to the left side of the drawing. It can be removed. In addition, there may be a case where this shifted design is called an eccentric lens.

  Further, the geometric center of the fixing jig 111 is generally arranged so as to coincide with the optical center OC of the lens blank LB. The reason is that when the center thickness of the intermediate lens targeted by the processing machine is not reached, the correction amount of the center thickness is calculated by the height of the lens at the position of the optical center of the alloy and the intermediate lens LB1. Further, although the optical center OC of the lens blank LB is normally PRP (prism reference point), it is easy to generate a prism if the geometric center of the fixing jig is on the optical center OC of the lens blank LB.

  FIG. 3 is a diagram illustrating a design example of the lens blank LB. As shown in FIG. 3, the center of the lens blank LB itself is the geometric center GC, but the optical center OC is shown as an example in which the optical center OC is designed at a position 2.5 mm away from the geometric center GC to the right side of the drawing. Yes. In this case, the optical center FOC of the frame-shaped lens FL is overlapped with the optical center OC of the lens blank LB to calculate the elliptical intermediate lens LB1, and the center of the ellipse is the geometric center GC of the lens blank LB. It becomes the same position.

  Returning to FIG. 1, the frame-shaped lens FL is a lens formed in a shape substantially the same as or close to the shape of the eyeglass frame in plan view. The frame-shaped lens FL is formed of, for example, plastic or glass. In FIG. 1A, the planar shape of the frame-shaped lens FL is set according to the shape of the spectacle frame. For example, two-dimensional data of the shape of the spectacle frame is acquired by a frame tracer, and the acquired two-dimensional data is set as the planar shape of the frame-shaped lens FL. Note that the planar shape of the frame-shaped lens FL is not limited to a track shape close to a quadrangular shape as shown in the figure, and may be another planar shape such as a circle, an ellipse, or a rhombus. FIG. 1A shows the left-eye frame-shaped lens FL, but the right-eye frame-shaped lens is symmetrical to the left-eye lens and will not be described.

  The lens blank LB or the intermediate lens LB1 is a lens used for forming a frame-shaped lens FL that is a spectacle lens. The lens blank LB or the intermediate lens LB1 is molded into the frame-shaped lens FL by cutting and polishing. The lens blank LB or the intermediate lens LB1 is formed of, for example, plastic or glass as described in the frame shape lens FL described above. In the following description, the lens blank LB or the intermediate lens LB1 before being molded into the frame-shaped lens FL is appropriately referred to as a spectacle lens (round ball lens) before the lens processing.

  The intermediate lens LB1 shown in FIG. 1A is formed in an oval shape in plan view. The intermediate lens LB1 is in a state where the outer periphery is cut with respect to the circular lens blank LB. The elliptical shape of the intermediate lens LB1 is calculated from the shape of the frame-shaped lens FL and the shape of the alloy (the inner peripheral surface 12 of the blocking ring 100). The intermediate lens is a spectacle lens that has been subjected to grinding and polishing processing on a semi-finished lens (corresponding to the lens blank LB of the present embodiment), but has not been subjected to surface treatment processing. The intermediate lens may be processed into an ellipse or other shape in the grinding process for the purpose of providing a thinner lens. Therefore, the intermediate lens is not limited to a round shape, and may be an ellipse or other shapes.

  A blocking ring 100 shown in FIGS. 1A to 1C is formed in an annular shape in a plan view, for example. The blocking ring 100 has a geometric center axis AX1, and is arranged so that the geometric center axis AX1 and the geometric center of the intermediate lens LB1 or the lens blank LB (frame-shaped lens FL) coincide with each other in plan view. However, as shown in FIG. 2, when the geometric center of the fixing jig 111 is arranged at the optical center OC of the lens blank LB, the blocking ring 100 sets the geometric center axis AX1 to the optical center OC shifted from the geometric center axis AX1. Arranged to match. The blocking ring 100 is formed using, for example, a resin material. The resin material constituting the blocking ring 100 is, for example, a material that does not melt at the melting temperature (about 50 ° C. to 70 ° C.) of the alloy, and is attached to the lens blank LB or the intermediate lens LB1 and the lens surface L1. (Polyethylene, polypropylene, etc.), alloys, materials that do not adhere to the fixing jig 111 and the like can be mentioned. Examples of such a resin material include polypropylene, ABS resin, PLA resin, special filament (XT-copolyester, amphora 3D filament) and the like.

  The blocking ring 100 may be formed using a material other than the resin material. For example, the blocking ring 100 may be formed of a metal such as aluminum or iron, wood, ceramics, porcelain, or the like. In addition, the blocking ring 100 may be subjected to a surface treatment for facilitating peeling at a portion in contact with the lens surface.

  The blocking ring 100 includes an outer peripheral surface 11, an inner peripheral surface 12, a lower surface 14, and a lens contact surface 13. The outer peripheral surface 11 is formed in a shape that can be installed on a blocker (a device for filling an alloy in a blocking ring, the same applies hereinafter). The outer peripheral surface 11 shown in FIG. 1A is formed, for example, in a similar shape to an inner peripheral surface 12 described later, or in a similar shape to the frame-shaped lens FL. The outer peripheral surface 11 is formed with a size larger than that of the frame-shaped lens FL, but may be formed with the same size as the frame-shaped lens FL or a smaller size.

  The inner peripheral surface 12 is formed in a circular shape or a non-circular shape that matches the outer periphery of the frame-shaped lens FL. For example, the inner peripheral surface 12 is formed in a shape obtained by deforming a part of a circle based on the outer periphery of the frame-shaped lens FL. The inner peripheral surface 12 of the blocking ring 100 shown in FIG. 1 is formed, for example, in a shape similar to the outer periphery of the frame-shaped lens FL or the shape of the outer peripheral surface 11. Moreover, the shape of the inner peripheral surface 12 is not limited to a similar shape, and may be set, for example, with a predetermined dimension d1 or more (for example, 1 mm to 20 mm) inward from the outer periphery of the frame-shaped lens FL. Further, the inner peripheral surface 12 is formed in an area smaller than that of the frame-shaped lens FL. The inner peripheral surface 12 may be formed in the same shape as the outer periphery of the frame-shaped lens FL.

  As shown in FIG. 1A, when the geometric center axis AX1 of the blocking ring 100 and the optical center of the frame-shaped lens FL are made coincident, the inner peripheral surface 12 is placed inside the frame-shaped lens FL. Be placed. Therefore, the blocking ring 100 is formed so that the outer periphery of the frame-shaped lens FL is disposed between the outer peripheral surface 11 and the inner peripheral surface 12. Further, the inner peripheral surface 12 is formed with a predetermined dimension d1 or more inside from the outer periphery of the frame-shaped lens FL. However, the predetermined dimension d1 may be constant or at the outer peripheral position of the frame-shaped lens FL. It may be changed accordingly.

  As shown in FIGS. 1B and 1C, the lens contact surface 13 contacts the lens surface L1 of the lens blank LB or the intermediate lens LB1. The lens contact surface 13 is formed with an inclination corresponding to the shape of the lens surface L1 of the lens blank LB or the intermediate lens LB1. For example, when the lens contact surface 13 contacts the lens surface L1 of the lens blank LB or the intermediate lens LB1, the shape of the contact portion of the lens surface L1 is set so that no gap is formed between the lens surface L1 and the lens surface L1. Are inclined or curved so as to have the same shape. The lens contact surface 13 is inclined from the inner side to the outer side so that the axial position of the geometric center axis AX1 increases. Accordingly, in the blocking ring 100, the height of the outer peripheral surface 11 in the axial direction of the geometric center axis AX1 is higher than that of the inner peripheral surface 12. The lens contact surface 13 may have a shape that is not inclined (parallel to a lower surface 14 described later).

  The lower surface 14 is formed in a planar shape as shown in FIG. The lower surface 14 is a surface to be placed on the blocker described above, and is formed according to the shape of the placement surface of the blocker. When the mounting surface of the blocker is a flat surface, the lower surface 14 is formed on the flat surface as shown in the figure. For example, when the mounting surface of the blocker is inclined or curved, or there is a protrusion, etc. The lower surface 14 is formed in accordance with the shape.

Second Embodiment
FIG. 4 is a diagram illustrating an example of a blocking ring according to the second embodiment. 4A is a plan view, FIG. 4B is a cross-sectional view taken along line BB in FIG. 4A, and FIG. 4C is a perspective view.

  A blocking ring 200 shown in FIG. 4A is formed in an annular shape in plan view as in the first embodiment, and includes an outer peripheral surface 21, an inner peripheral surface 22, a lens contact surface 23, and a lower surface 24. Prepare. The outer peripheral surface 21 is formed in a circular shape in plan view. The inner peripheral surface 22 is formed in a similar shape to the frame-shaped lens FL in plan view. The inner peripheral surface 22 is formed in an area smaller than the frame-shaped lens FL. FIG. 4A shows a case where the geometric center axis AX2 of the blocking ring 200 coincides with the geometric center of the frame-shaped lens FL. In such a case, the inner peripheral surface 22 is disposed so as to fit inside the frame-shaped lens FL. In this case, the inner peripheral surface 22 is formed with a predetermined dimension d2 or more inside from the outer periphery of the frame-shaped lens FL.

  In FIG. 4, the shape of the inner peripheral surface 22 is the same shape as the inner peripheral surface 12 shown in FIG. The shape may be different from the inner peripheral surface 12 shown in FIG. The predetermined dimension d2 is the same as the predetermined dimension d1 shown in FIG. 1, but may be a dimension different from the predetermined dimension d1.

  As shown in FIGS. 4B and 4C, the lens contact surface 23 is contacted with the lens surface L1 of the lens blank LB or the intermediate lens LB1. The lens contact surface 23 is formed corresponding to the shape of the lens surface L1 of the lens blank LB or the intermediate lens LB1. The lens contact surface 23 is inclined or curved from the inner side to the outer side so that the position of the geometric center axis AX2 in the axial direction becomes higher. Therefore, in the blocking ring 200, the outer peripheral surface 21 is higher in the axial direction of the geometric center axis AX <b> 2 than the inner peripheral surface 22.

  The lower surface 24 is formed in a planar shape as in the first embodiment. Moreover, the lower surface 24 is formed corresponding to the mounting surface of a blocker similarly to 1st Embodiment. Further, the circular outer peripheral surface 21 is set to a size that can be fitted into a mounting circular recess standardized in a blocker. Thereby, the blocking ring 200 can be installed in a state in which rattling or the like is prevented in an existing blocker. The shape of the outer peripheral surface 21 is not limited to that shown in the figure, for example, the lower surface 24 side of the outer peripheral surface 21 is formed in a circular shape, and the inner peripheral surface 22 has a similar shape toward the lens contact surface 23. But you can. Thereby, the circular lower surface 24 is securely installed on the blocker, and the lens contact surface 23 side has a similar shape to the inner peripheral surface 22, so that the resin material can be reduced.

<Third Embodiment>
FIG. 5A is a diagram illustrating an example of a blocking ring according to the third embodiment. A blocking ring 300 shown in FIG. 5A includes an outer peripheral surface 31, an inner peripheral surface 32, a lens contact surface 33, and a lower surface 34. The outer peripheral surface 31 is formed in a circular shape in plan view as in the second embodiment, but is not limited thereto. For example, the outer peripheral surface 31 has a similar shape to the outer periphery of the frame-shaped lens FL as in the first embodiment. May be. Note that the lens contact surface 33 and the lower surface 34 are the same as those in the first and second embodiments described above, and thus the description thereof is omitted.

  The inner peripheral surface 32 is formed in an elliptical shape in plan view. The elliptical shape of the inner peripheral surface 32 can be arbitrarily set, and the length of the major axis and the length of the minor axis can be arbitrarily set according to the outer periphery of the frame-shaped lens FL. Further, the inner peripheral surface 32 is formed in an area smaller than that of the frame-shaped lens FL. FIG. 5A shows a case where the geometric center axis AX3 of the blocking ring 300 coincides with the geometric center of the frame-shaped lens FL. In such a case, the inner peripheral surface 32 is disposed so as to fit inside the frame-shaped lens FL. The inner peripheral surface 32 is formed with a predetermined dimension d3 or more inside from the outer periphery of the frame-shaped lens FL. The predetermined dimension d3 differs depending on the outer peripheral position of the frame-shaped lens FL.

<Fourth embodiment>
FIG. 5B is a diagram illustrating an example of a blocking ring according to the fourth embodiment. A blocking ring 400 shown in FIG. 5B includes an outer peripheral surface 41, an inner peripheral surface 42, a lens contact surface 43, and a lower surface 44. The outer peripheral surface 41 is formed in a circular shape in plan view as in the second embodiment, but is not limited to this. For example, as in the first embodiment, the outer peripheral surface 41 has a shape similar to the outer periphery of the frame-shaped lens FL. There may be. The lens contact surface 43 and the lower surface 44 are the same as those in the first to third embodiments described above, and a description thereof will be omitted.

  The inner peripheral surface 42 is formed in an oval shape in plan view. The oval shape of the inner peripheral surface 42 can be arbitrarily set, and the length of the horizontal straight portion and the semicircular shapes at both ends can be arbitrarily set according to the outer periphery of the frame-shaped lens FL. Moreover, the semicircular shape at both ends may be a semi-elliptical shape. The inner peripheral surface 42 is formed in an area smaller than that of the frame-shaped lens FL. FIG. 5B shows a case where the geometric center axis AX4 of the blocking ring 400 coincides with the geometric center of the frame-shaped lens FL. In such a case, the inner peripheral surface 42 is disposed so as to fit inside the frame-shaped lens FL. The inner peripheral surface 42 is formed with a predetermined dimension d4 or more inside from the outer periphery of the frame-shaped lens FL. The predetermined dimension d4 differs depending on the outer peripheral position of the frame-shaped lens FL.

<Fifth Embodiment>
FIG. 6A is a diagram illustrating an example of a blocking ring according to the fifth embodiment. A blocking ring 500 illustrated in FIG. 6A includes an outer peripheral surface 51, an inner peripheral surface 52, a lens contact surface 53, and a lower surface 54. The outer peripheral surface 51 is formed in a circular shape in plan view as in the second embodiment, but is not limited to this. For example, as in the first embodiment, the outer peripheral surface 51 has a shape similar to the outer periphery of the frame-shaped lens FL. There may be. The lens contact surface 53 and the lower surface 54 are the same as those in the first to fourth embodiments described above, and a description thereof will be omitted.

  The inner peripheral surface 52 is formed in a rectangular shape (square shape, rectangular shape) in plan view. The rectangular shape of the inner peripheral surface 52 can be arbitrarily set, and the length in the horizontal direction and the length in the vertical direction can be arbitrarily set according to the outer periphery of the frame-shaped lens FL. Further, the shape of the inner peripheral surface 42 may be a trapezoidal shape, a parallelogram shape, or a rhombus shape, or may be a triangular shape or a polygonal shape of a pentagonal shape or more. The inner peripheral surface 52 is formed in an area smaller than the frame-shaped lens FL. FIG. 6A shows a case where the geometric center axis AX5 of the blocking ring 500 coincides with the geometric center of the frame-shaped lens FL. In such a case, the inner peripheral surface 52 is disposed so as to fit inside the frame-shaped lens FL. The inner peripheral surface 52 is formed with a predetermined dimension d5 or more inside from the outer periphery of the frame-shaped lens FL. The predetermined dimension d5 differs depending on the outer peripheral position of the frame-shaped lens FL.

<Sixth Embodiment>
FIG. 6B is a diagram illustrating an example of a blocking ring according to the sixth embodiment. A blocking ring 600 shown in FIG. 6B includes an outer peripheral surface 61, an inner peripheral surface 62, a lens contact surface 63, and a lower surface 64. The outer peripheral surface 61 is formed in a circular shape in plan view as in the second embodiment, but is not limited to this. For example, as in the first embodiment, the outer peripheral surface 61 has a shape similar to the outer periphery of the frame-shaped lens FL. There may be. The lens contact surface 63 and the lower surface 64 are the same as those in the first to fifth embodiments described above, and a description thereof will be omitted.

  The inner peripheral surface 62 is formed in a rectangular shape in a plan view, and each corner is rounded. The inner peripheral surface 62 is set according to the outer periphery of the frame-shaped lens FL, and may be a trapezoidal shape, a parallelogram shape, a rhombus shape in addition to a rectangular shape, and may be a triangular shape or a polygonal shape of a pentagonal shape or more. May be. Moreover, the radius of each corner | angular part can be set arbitrarily. The inner peripheral surface 62 is formed in a smaller area than the frame-shaped lens FL. FIG. 6B shows a case where the geometric center axis AX6 of the blocking ring 600 coincides with the geometric center of the frame-shaped lens FL. In such a case, the inner peripheral surface 62 is disposed so as to fit inside the frame-shaped lens FL. The inner peripheral surface 62 is formed with a predetermined dimension d6 or more inside from the outer periphery of the frame-shaped lens FL. The predetermined dimension d6 differs depending on the outer peripheral position of the frame-shaped lens FL.

<Seventh embodiment>
FIG. 7 is a diagram illustrating an example of a blocking ring according to the seventh embodiment. A blocking ring 700 illustrated in FIG. 7 includes an outer peripheral surface 71, an inner peripheral surface 72, a lens contact surface 73, and a lower surface 74. The lens contact surface 73 is in contact with the lens surface LB of the lens blank LB or the intermediate lens LB1 as in the above-described embodiment. The lower surface 74 is formed in a planar shape similarly to the above-described embodiment.

  The blocking ring 700 shown in FIG. 7 is formed so that the height of the lens contact surface 73 is different. In FIG. 7, the left lens contact surface 73 is formed to be higher than the right side. The lens contact surface 73 is formed in a shape corresponding to the lens surface L1 inclined at an angle θ with respect to the horizontal plane, for example, a curved surface shape matching the lens surface L1. Therefore, when the lens blank LB or the intermediate lens LB1 is placed on the lens abutting surface 73, the lens blank LB or the intermediate lens LB1 is disposed in an inclined state θ with respect to the horizontal plane. By using such a blocking ring 700, the fixing jig 111 (see FIG. 14 and the like) can be inclined and fixed to the lens surface L1 with respect to the optical center axis of the lens blank LB or the intermediate lens LB1. Thereby, when the lens surface of the lens blank LB or the intermediate lens LB1 is polished, a prism that has been conventionally generated by a processing machine (generator) can be easily reproduced.

<Eighth Embodiment>
FIG. 8 is a diagram illustrating another example of the blocking ring according to the eighth embodiment. 8A is a plan view, and FIG. 8B is a cross-sectional view taken along line CC in FIG. 8A. A blocking ring 100A shown in FIGS. 8A and 8B has substantially the same outer diameter shape as the blocking ring 100 shown in FIG. 1, for example. The blocking ring 100 </ b> A includes an outer peripheral surface 11, an inner peripheral surface 12, a lower surface 14, and a lens contact surface 13, and further includes two through holes 15.

  The through holes 15 are formed by penetrating (communicating) the outer peripheral surface 11 and the inner peripheral surface 12, respectively. The through-hole 15 may be used as an introduction path for filling the alloy inside the inner peripheral surface 12, and when the alloy is filled inside the inner peripheral surface 12, the air inside the inner peripheral surface 12 may be used. May be used as an exhaust path for releasing the air to the outside.

  The through holes 15 are arranged at both ends in the left-right direction of FIG. 8A in the blocking ring 100A, but are not limited to this, and are provided at both ends in the up-down direction of FIG. 8A, for example. It may be provided either on the top, bottom, left or right. Further, the number of through holes 15 is not limited to two, and one or three or more may be formed. Moreover, the formation position of the through-hole 15 is arbitrary, and when forming the multiple through-holes 15, you may form close to each other. The inner diameter of the through hole 15 can be set arbitrarily. In the above-described blocking rings 200 to 700, the same configuration as the through hole 15 may be provided.

  According to the blocking rings 100 to 700 and 100A configured as described above, the blocking ring corresponding to the frame-shaped lens can be used, so that an increase in the intermediate lens can be suppressed by using this blocking ring. The edge of the frame-shaped lens can be made thin.

<Manufacturing method of blocking ring>
Next, the manufacturing method of the blocking rings 100-700 and 100A comprised as mentioned above is demonstrated. Hereinafter, the blocking ring 100 will be described as an example, but the same description can be applied to the blocking rings 200 to 700 and 100A. The manufacturing method of the blocking ring 100 includes setting the shape of the inner peripheral surface 12 of the blocking ring 100 to a circular shape or a non-circular shape that matches the outer periphery of the frame-shaped lens FL, and the inner periphery so as to have a set shape. Forming a surface 12. In this embodiment, the procedure of setting the three-dimensional shape data including the shape of the inner peripheral surface 12 of the blocking ring 100 and forming the blocking ring 100 including the inner peripheral surface 12 based on the set three-dimensional shape data. An example will be described.

  First, the procedure for setting the three-dimensional shape data of the blocking ring 100 will be described. FIGS. 9, 10 </ b> A and 10 </ b> B are flowcharts showing a procedure for setting the three-dimensional shape data of the blocking ring 100 including the shape of the inner peripheral surface 12. FIG. 9 shows a procedure for setting the shape of the inner peripheral surface 12 in plan view. FIG. 10A shows a procedure for setting the shape of the outer peripheral surface 11 in plan view. FIG. 10B shows a procedure for setting the three-dimensional shapes of the inner peripheral surface 12 and the outer peripheral surface 11. The procedure for setting the three-dimensional shape data of the blocking ring 100 described below can be performed using, for example, a personal computer.

  As shown in FIG. 9, when setting the shape of the inner peripheral surface 12, first, the lens surface of the lens blank LB to be contacted with the blocking ring 100 is determined (step S <b> 01). In step S01, one of the two lens surfaces of the lens blank LB is determined.

  Next, it is determined whether or not the minimum alloy filling range is set in plan view (step S02). In step S02, it is determined whether or not a minimum required alloy filling range is set in accordance with, for example, the thickness, shape and dimensions of the frame-shaped lens FL and the dimensions and shape of the fixing jig 111. When the minimum filling range is set (YES in step S02), the minimum filling range is set based on information such as the index, curve, and addition power of the frame-shaped lens FL (step S03). The minimum filling range can be set to, for example, a circle or an ellipse in plan view.

  When the minimum filling range is not set (NO in step S02), or after performing step S03, it is determined whether or not a frame shape is designated by the customer (step S04). If specified (YES in step S04), for example, the position and shape of the frame set on the lens blank surface are determined based on the frame shape and fitting information specified by the customer, and the frame shape lens FL is determined. A range formed with a predetermined dimension from the outer periphery to the inner side is set as a filling range (step S05). When the frame shape is not specified by the customer (NO in step S04), the outer diameter specified by the customer (specified outer diameter of the round lens) or the standard outer diameter preset from the prescription (standard of the round lens) The filling range is set according to the outer diameter) (step S06). That is, the designation from the customer may include information on the frame shape, and may include the outer diameter of the round lens that covers the frame shape without including the frame shape information.

  After performing step S06, it is determined whether or not the filling range is set based on the shape of the intermediate lens LB1 (step S07). If it is determined to be set (YES in step S07), for example, a range formed with a predetermined dimension inward from the outer periphery of the intermediate lens LB1 in plan view is set as the filling range (step S08). The shape of the intermediate lens LB1 is calculated based on the frame shape, for example.

  When the filling range is not set based on the shape of the intermediate lens LB1 (NO in step S07), or after performing step S08, the shape of the inner peripheral surface 12 of the blocking ring in a plan view based on the set filling range Is set (step S09). In step S09, for example, a shape in which the filling ranges set in step S03, step S05, step S06, and step S08 are overlapped is set as the shape of the inner peripheral surface 12 in plan view. In addition, when the minimum filling range is set in step S03, it sets so that this minimum filling range may be included in the shape of the internal peripheral surface 12 at least.

  Next, as shown in FIG. 10A, the shape of the outer peripheral surface 11 is set. In this case, first, it is determined whether or not an existing blocker is used as a support base for supporting the fixing jig 111 (step S11). When using an existing blocker (YES in step S11), a shape preset as the outer peripheral shape of the existing blocking ring is set as the shape of the outer peripheral surface 11 (step S12).

  When an existing blocker is not used (NO in step S11), it is determined whether there is a shape designated as the shape of the outer peripheral surface 11 (step S13). The shape of the outer peripheral surface 11 may be limited by, for example, the type of blocker. For this reason, when not using the existing blocker, it is necessary to confirm whether the shape of an outer peripheral surface is restrict | limited by the blocker to be used. If there is a designated shape (YES in step S13), the designated shape is set as the shape of the outer peripheral surface 11 (step S14).

  If there is no specified shape (NO in step S13), the shape of the outer peripheral surface 11 is set according to the thickness from the inner peripheral surface 12 (step S15). In step S <b> 15, for example, a shape with a predetermined dimension (thickness) outside the inner peripheral surface 12 in a plan view can be set as the shape of the outer peripheral surface 11. Thus, the shape of the outer peripheral surface 11 is set by step S12, step S14, or step S15.

  Next, as shown in FIG. 10B, the three-dimensional shape of the blocking ring 100 is set. First, the inner peripheral surface 12 and the outer peripheral surface 11 are set to a predetermined height, and three-dimensional data (X coordinate, Y coordinate, Z coordinate) in that case is set (step S21). In step S21, for example, three-dimensional data is set at intervals of 0.1 mm for each of the X direction, the Y direction, and the Z direction.

  Next, it is determined whether or not the lens contact surface 13 is inclined (step S22). When providing an inclination (YES in step S22), the three-dimensional data set in step S21 is changed (step S23). In step S23, for example, when the lens blank LB or the intermediate lens LB1 is placed on the lens contact surface 13, the lens blank LB or the intermediate lens LB1 is set in step S21 so as to have an inclination angle θ with respect to the horizontal plane. The three-dimensional data of the lens contact surface 13 is changed.

  If no inclination is provided (NO in step S22), or after performing step S23, it is determined whether or not a space for the injection nozzle for injecting the alloy is necessary (step S24). If a space for the injection nozzle is required (YES in step S24), the three-dimensional data set in step S21 or step S23 is changed so that a space is formed at a location corresponding to the portion where the injection nozzle is disposed. (Step S25). When the space of the injection nozzle is unnecessary (NO in step S24), or after performing step S25, the three-dimensional shape data of the blocking ring 100 is completed (step S26). The completed three-dimensional shape data of the blocking ring 100 can be stored in, for example, a storage unit of a personal computer or an external memory.

  Next, a procedure for forming the blocking ring 100 including the inner peripheral surface 12 based on the set three-dimensional shape data will be described. In this embodiment, the case where the blocking ring 100 is formed using a three-dimensional modeling apparatus such as a 3D printer will be described as an example. FIG. 11A is a flowchart showing a procedure for forming the blocking ring 100.

  When forming the blocking ring 100, as shown in FIG. 11A, first, the three-dimensional shape data completed as described above is input to the three-dimensional modeling apparatus (step S31). Next, a material necessary for forming the blocking ring 100 is put into the three-dimensional modeling apparatus (step S32). Subsequently, the blocking ring 100 is formed by operating the three-dimensional modeling apparatus (step S33). In step S33, as shown in FIG. 11B, blocking is performed by discharging a resin droplet from the nozzle 101 of the three-dimensional modeling apparatus onto a predetermined plane and irradiating the resin with ultraviolet rays or the like to cure. A ring 100 is formed.

  The blocking ring 100 is manufactured by such a procedure. In addition, as the three-dimensional modeling apparatus, any type of apparatus such as a hot melt lamination type, an ink jet type, and a photocuring type may be used. By using the three-dimensional modeling apparatus, it is possible to produce the blocking ring 100 with less errors such as dimensions and shapes in a short time. The blocking ring 100 is not limited to using the above three-dimensional modeling apparatus. For example, the blocking ring 100 may be formed by cutting a resin or metal lump based on the above-described three-dimensional shape data.

<Manufacturing method of spectacle lens>
Next, a method for manufacturing a spectacle lens will be described. FIG. 12 is a flowchart showing a method for manufacturing a spectacle lens according to this embodiment. As shown in FIG. 12, the method for manufacturing a spectacle lens according to the present embodiment includes manufacturing a lens blank LB (step S41), manufacturing a blocking ring 100 (step S42), and a lens blank LB lens. Placing the blocking ring 100 between the surface L1 and the fixing jig 111 (step S43), injecting an alloy into the blocking ring 100 to fix the fixing jig 111 to the lens blank LB (step) S44), processing the lens blank LB using the fixing jig 111 (step S45). Hereinafter, each step will be described in order.

  In step S41, the case where the lens blank LB is a plastic lens will be described as an example. FIG. 13A is a flowchart showing a procedure for manufacturing the lens blank LB. As shown in FIG. 13A, first, a lens material is prepared (step S51). In step S51, the lens material may include, for example, an ultraviolet curable resin, or may include a thermally polymerizable resin such as diethylene glycol bisallyl carbonate. The lens material may contain a catalyst, an ultraviolet absorber, and the like. The lens material may be prepared by mixing, or may be purchased and prepared.

  After preparing the lens material, a lens matrix is prepared (step S52). FIG. 13B is a cross-sectional view of the lens matrix. As shown in FIG. 13B, the lens matrix 105 is made of, for example, chemically strengthened glass. The lens matrix 105 includes a first member 106 having a concave surface 106 a, a second member 107 having a surface 107 a disposed opposite to the concave surface 106 a of the first member 106, and the first member 106. And a third member 108 that partitions the space between the first member 107 and the second member 107 from the outside.

  The first member 106 is a so-called lower mold and is a part that determines the shape of the lens surface L1 of the lens blank LB. The second member 107 is a so-called upper mold and is a part that determines the shape of the lens surface L2 of the lens blank LB. The lens surfaces L1 and L2 are formed by the surface 106a of the first member 106 and the surface 107a of the second member 107, respectively.

  The third member 108 is a so-called gasket and defines a gap between the first member 106 and the second member 107. The third member 108 is a part that determines the thickness of the lens blank LB. The third member 108 is provided so as to annularly surround the space between the first member 106 and the second member 107 facing each other. Inside the assembled lens matrix 105, a space SP1 partitioned from the outside is formed. The third member 108 is provided with an inlet (not shown) that communicates with the space SP1.

  After preparing the lens matrix 105, a lens material is injected into the lens matrix 105 (step S53). In step S53, the lens material is filled into the space SP1 through, for example, an injection port that leads to the space SP1. After the lens material is injected into the lens matrix 105, the lens material is polymerized (cured) (step S54). In step S54, the lens material is cured by ultraviolet curing or heat curing according to the lens material. In step S54, the polymerization is completed while paying attention to the volume fluctuation accompanying the polymerization. The lens blank LB is completed by solidifying by polymerization.

  After the lens material is polymerized, the lens matrix 105 is released from the lens blank LB (step S55). In the lens blank LB separated from the lens matrix 105 in step S55, internal strain generated during polymerization may remain. Therefore, after releasing the mold, the lens blank LB is annealed to remove internal strain (step S56).

  You may affix the protective film F on the lens surface L1 after step S56. Examples of the protective film F include a film that protects the lens surface L1 of the lens blank LB, a film that improves adhesion to an adhesive such as an alloy, and a film that easily peels when the adhesive such as an alloy is removed. Used. The above-described lens blank LB shows the lens surfaces L1 and L2 having convex surfaces, but is not limited to this, and for example, the lens surface L2 may be flat or concave.

  Returning to FIG. 12, in step S <b> 42, the blocking ring 100 is manufactured by the above-described procedure. That is, the three-dimensional shape data of the blocking ring 100 is set by the procedures of steps S01 to S09, steps S11 to S15, and steps S21 to S26. Thereafter, the blocking ring 100 is formed by the procedures of steps S31 to S33. Thereby, the blocking ring 100 is manufactured.

  Next, step S43 in FIG. 12 will be described. 14A to 14D are diagrams for explaining the procedure in step S43. First, as shown in FIG. 14A, the blocker 110 includes a hole portion 110a and an annular and concave mounting portion 110b centered on the hole portion 110a. Next, as shown in FIG. 14B, the fixing jig 111 is disposed in the hole 110a. Next, as shown in FIG. 14C, the blocking ring 100 manufactured in step S42 is disposed on the placement portion 110b. The blocking ring 100 is positioned with respect to the blocker 110 by the outer peripheral surface 11 coming into contact with the inner wall of the placement portion 110b.

  Next, as shown in FIG. 14D, the lens blank LB is disposed. The lens blank LB is arranged so that the lens surface L1 faces the fixing jig 111 side. The lens blank LB is placed in a state where the protective film F on the lens surface L1 is in contact with the lens contact surface 13 of the blocking ring 100. Since the lens contact surface 13 is formed in a shape corresponding to the lens surface L1, formation of a gap between the lens surface L1 and the protective film F is suppressed. When the lens blank LB is disposed, the space SP2 between the protective film F of the lens blank LB and the fixing jig 111 is partitioned from the outside.

  Next, step S44 of FIG. 12 will be described. FIG. 15A is a diagram for explaining the procedure of step S44. In step S44, as shown in FIG. 15A, the space SP2 formed by disposing the lens blank LB is filled with an alloy (low melting point alloy) AD that is heated to be liquid. After the alloy AD is filled, when the temperature of the alloy AD becomes lower than the melting point and is cured by cooling, the lens blank LB and the fixing jig 111 are fixed via the solidified alloy AD. Thereafter, by removing the lens blank LB from the blocker, the blocking ring 100 is detached from the lens blank LB, and the lens blank LB including the fixing jig 111 is obtained.

  In the present embodiment, since the inner peripheral surface 12 of the blocking ring 100 has a shape that matches the outer periphery of the frame-shaped lens FL, the shape of the alloy AD is a shape that matches the outer periphery of the frame-shaped lens FL. In addition, the outer periphery of the alloy AD in a plan view is arranged in a range that is a predetermined dimension inward from the outer peripheral portion of the frame-shaped lens FL.

  Next, step S45 in FIG. 12 will be described. FIG. 15B is a diagram illustrating a state in which the lens surface L2 of the lens blank LB is cut. In step S45, as shown in FIG. 15B, when the lens surface L2 is processed, the lens surface L1 is fixed to the support 115 including the fixing jig 111 and the alloy AD. The processing device 116 includes a processing tool 117 and a rotation mechanism 118. As the processing tool 117, a tool for cutting the lens surface L2 of the lens blank LB or a tool for polishing the lens surface L2 is used. Further, the processing device 116 may perform processing for forming the elliptical intermediate lens LB1 from the circular lens blank LB.

  One end of the fixing jig 111 in the axial direction is fixed to the lens surface L1 of the lens blank LB or the intermediate lens LB1 through the alloy AD. The other end of the fixing jig 111 in the axial direction is detachably fixed to the rotation mechanism 118. The rotation mechanism 118 is provided so as to be rotatable around a predetermined rotation axis. The fixing jig 111 is attached to the rotation mechanism 118 so that the central axis thereof is coaxial with the rotation axis of the rotation mechanism 118. The rotating mechanism 118 rotates by a driving force supplied from a driving source such as a motor (not shown).

  The lens blank LB or the intermediate lens LB1 rotates through the support 115 by the rotation of the rotation mechanism 118. The processing tool 117 performs cutting (generation) on the rotating lens blank LB or intermediate lens LB1. In this cutting process, for example, cutting is performed while adjusting the power, progressive focus, aspherical state, and the like.

  Further, when the lens blank LB or the intermediate lens LB1 is polished, a polishing member is used as the processing tool 117 in the same manner as in the cutting process. The polishing member is formed in a sponge shape, for example, and is provided so as to be deformable by external pressure. The polishing member is arranged so as to cover the entire area of the lens surface L2, for example. The lens blank LB or the intermediate lens LB1 is rotated by the rotation mechanism 118 while the polishing member is in contact with the lens surface L2. When the lens blank LB or the intermediate lens LB1 rotates while the polishing member is pressed, the lens blank LB or the intermediate lens LB1 is polished by friction with the polishing member. After the cutting process and the polishing process are finished, the alloy AD and the protective film F are removed from the lens blank LB or the intermediate lens LB1, and the fixing jig 111 is removed from the lens blank LB or the intermediate lens LB1.

  Thereafter, the surface treatment of the round lens (lens blank LB or intermediate lens LB1) is performed. For example, various thin films such as a hard coat film and an antireflection film are formed on a round lens. Subsequently, a layout mark or the like is formed on the surface of the round lens.

  Subsequently, if there is an order for target lens processing, target lens processing is performed on a round lens. Thereby, a spectacle lens (lens lens) corresponding to the shape of the spectacle frame is manufactured. Subsequently, in the case of an order for lens processing, after the layout mark of the spectacle lens (lens lens) is removed, the final shipping inspection is performed, and the final spectacle lens (lens lens) is shipped. In addition, if there is no order processing, the eyeglass lens (round ball) in which the layout mark is printed with round balls after the layout mark is printed without performing the ball processing. Lens).

  As described above, according to the present embodiment, since the inner peripheral surface 12 of the blocking ring 100 is shaped to match the outer periphery of the frame-shaped lens FL, the shape of the alloy AD is matched to the outer periphery of the frame-shaped lens FL. It becomes a shape. As a result, the elliptical shape of the intermediate lens can be reduced, and the edge portion of the frame-shaped lens FL can be made thin.

<Another example of a method for manufacturing a spectacle lens>
Next, another example of the spectacle lens manufacturing method according to the present embodiment will be described. This embodiment is different from the above-described embodiment in that the blocking ring 100 is directly formed in the blocker 110. Hereinafter, the difference from the above-described embodiment will be mainly described. FIG. 16 is a flowchart showing another example of a method for manufacturing a spectacle lens according to this embodiment. FIGS. 17A to 17C and FIGS. 18A to 18C are diagrams showing a manufacturing process of a spectacle lens, respectively.

  As shown in FIG. 16, the eyeglass lens manufacturing method according to the present embodiment first manufactures a lens blank (step S <b> 61). In step S61, the lens blank LB is manufactured in the same procedure as in step S41 in the above-described embodiment.

  Next, as shown in FIG. 16, the fixing jig 111 is installed on the blocker 130 (step S62). In step S62, as shown in FIG. 17A, a blocker 130 provided with a hole 110a, a mounting portion 110b, and a plurality of columns 120 is prepared. The hole part 110a and the mounting part 110b are the same as the blocker 110 shown in FIG. The support columns 120 are disposed outside the placement unit 110b and are provided so as to be movable up and down. Each column 120 may be lifted or lowered by a driving device (not shown) or manually by an operator. In the blocker 130, the fixing jig 111 is disposed in the hole 110a by the above-described step S62.

  Next, as shown in FIG. 16, the support column 120 is raised from the blocker 130 and protruded from the blocker 130 (step S63). In step S <b> 63, as shown in FIG. 17B, the upper end of the column 120 is protruded above the blocker 130. The height of the upper end of each column 120 is adjusted to be equal. In addition, when arrange | positioning the lens blank LB inclining with respect to a horizontal surface, the height of the upper end of each support | pillar 120 can be adjusted so that the lens blank LB may hold | maintain the inclined state.

  Next, as shown in FIG. 16, the lens blank LB is placed on the support 120 (step S64). In step S <b> 64, as shown in FIG. 17C, the lens surface L <b> 1 (protective film F) of the lens blank LB is disposed so as to contact the support 120.

  Next, as shown in FIG. 16, the blocking ring 100 is formed at a predetermined position (mounting portion 110b) of the blocker 130 (step S65). In step S65, as shown in FIG. 18A, for example, using the nozzle 102 of a three-dimensional modeling apparatus such as a three-dimensional printer, steps S31 to S33 described in the above embodiment (see FIG. 11A) The blocking ring 100 is formed on the mounting part 110b by the same procedure. For example, the nozzle 102 is inserted between the lens blank LB supported by the support 120 and the blocker 130. In step S65, the height of the support column 120 may be adjusted to a height at which the nozzle 102 can be inserted. Further, the shape of the blocking ring 100 manufactured by the nozzle 102 is set based on the three-dimensional shape data obtained in the same manner as in the above embodiment.

  By forming the blocking ring 100 with the mounting portion 110b of the blocker 130, it is not necessary to create the blocking ring 100 at another location. Further, the blocking ring 100 can be formed in a state where the positioning is performed with the blocker 130. In step S65, as shown by a dotted line in FIG. 18A, for example, the lens surface L2 of the lens blank LB may be pressed by the pressing member 103 so that the position of the lens blank LB does not shift.

  Note that step S65 may not be a state in which the lens blank LB is disposed on the support column 120. That is, after forming the blocking ring 100 on the blocker 130, the lens blank LB may be mounted on the formed blocking ring 100. In this case, since it is not necessary to support the lens blank LB above the blocking ring 100, the support 120 is unnecessary, and for example, the blocker 110 shown in FIG. 14 may be used.

  Next, as shown in FIG. 16, the support column 120 is lowered and accommodated in the blocker 130, and the lens blank LB is disposed on the blocking ring 100 (step S66). In step S66, as shown in FIG. 18B, the lens blank LB is placed in a state where the protective film F on the lens surface L1 is in contact with the lens contact surface 13 of the blocking ring 100. Since the lens contact surface 13 is formed in a shape corresponding to the lens surface L1, formation of a gap between the lens surface L1 and the protective film F is suppressed. When the lens blank LB is disposed, the space SP2 between the protective film F of the lens blank LB and the fixing jig 111 is partitioned from the outside.

  In step S66, after the resin corresponding to the lens contact surface 13 is discharged from the nozzle 102, the support column 120 is lowered without being cured, and the liquid resin is brought into contact with the lens surface L1 and then irradiated with ultraviolet rays or the like. Then, the resin may be cured. As a result, the liquid resin is cured while being in contact with the lens surface L1, so that the lens contact surface 13 is formed following the lens surface L1, and the lens surface L1 and the blocking ring 100 are more tightly sealed. It can be in the state that was done.

  Next, as shown in FIG. 16, an alloy is injected into the blocking ring 100 to fix the fixing jig 111 to the lens blank LB (step S67). In step S67, the fixing jig 111 is fixed to the lens blank LB via an alloy as shown in FIG. 18C by the same procedure as in step S44 (see FIG. 12) in the above-described embodiment.

  Next, as shown in FIG. 16, the lens blank LB is processed using the fixing jig 111 (step S68). After removing the lens blank LB from the blocker 130 and removing the blocking ring 100 from the lens blank LB, Step S68 is performed. In step S68, a spectacle lens is obtained by processing the lens blank LB by the same procedure as in step S45 (see FIG. 12) in the above-described embodiment.

  As described above, according to the present embodiment, since the inner peripheral surface 12 of the blocking ring 100 is shaped to match the outer periphery of the frame-shaped lens FL, as in the above-described embodiments, the edge portion of the frame-shaped lens FL Can be made thin. Moreover, according to this embodiment, since the blocking ring 100 is directly formed in the mounting part 110b of the blocker 130, it is not necessary to manufacture the blocking ring 100 in another place, and also the positions of the blocker 130 and the blocking ring 100 Matching is easy.

  The embodiment has been described above, but the present invention is not limited to the above description, and various modifications can be made without departing from the gist of the present invention. For example, the location where the blocking ring 100 is manufactured is arbitrary, and the above description shows the placement unit 110b of the blocker 130 as an example. However, the present invention is not limited to this. For example, a blocking ring may be manufactured on the lens blank LB.

  FIG. 19 is a diagram showing another example of a method for manufacturing a blocking ring. As shown in FIG. 19, liquid resin is discharged onto the lens surface L1 (protective film F) from the nozzle 104 of a 3D modeling apparatus such as a 3D printer with the lens surface L1 of the lens blank LB facing upward. Then, the blocking ring 100 may be manufactured. In this case, the blocking ring 100 is formed on the lens surface L1 (protective film F). Thereby, since the lens contact surface 13 of the blocking ring 100 is formed in close contact with the lens surface L1, the shape of the lens contact surface 13 along the lens surface L1 can be easily formed.

  Moreover, when using a photocurable ink, the light which hardens an ink can be irradiated from the lens surface L2 side of the lens blank LB, for example. Thereby, the blocking ring 100 can be manufactured efficiently.

  Moreover, in each above-mentioned embodiment, although inner peripheral surface 12 grade | etc., Such as blocking ring 100 is formed in non-circular shape, it is not limited to this, You may form an inner peripheral surface circularly. In this case, the inner diameter of the inner peripheral surface is appropriately set according to the frame-shaped lens FL. Even when such a blocking ring having a circular inner peripheral surface is used, since the alloy is filled in accordance with the frame-shaped lens FL, the shape of the alloy AD is a shape matched to the outer periphery of the frame-shaped lens FL. Become. As a result, the elliptical shape of the intermediate lens can be reduced, and the edge portion of the frame-shaped lens FL can be made thin.

  Further, when the blocking ring 100 or the like is manufactured, an index may be formed on the surface. Examples of such an index include an alignment mark for aligning the position with the lens blank LB, and an inscription for management during the manufacturing process. Moreover, when manufacturing the blocking ring 100 grade | etc., With 3D modeling apparatuses, such as 3D printer, an index | index can be easily formed by coloring resin.

LB ... lens blank, LB1 ... intermediate lens, FL ... frame-shaped lens, L1, L2 ... lens surface, F ... protective film, AD ... alloy (bonding material), 11, 21, 31, 41, 51, 61, 71 ... outer peripheral surface, 12, 22, 32, 42, 52, 62, 72 ... inner peripheral surface, 13, 23, 33, 43, 53, 63, 73 ... Lens contact surface, 15 ... Through hole, 100, 100A, 100-700 ... Blocking ring, 101, 102, 104 ... Nozzle, 103 ... Holding member, 110, 130 ... Blocker, 111 ... fixing jig, 115 ... support, 116 ... processing device, 120 ... support

Claims (14)

A blocking ring for injecting a bonding material between one lens surface of the lens blank and a fixing jig for processing,
An inner peripheral surface of the blocking ring is a blocking ring formed in a circular shape or a non-circular shape according to the outer periphery of the frame-shaped lens.   The blocking ring according to claim 1, wherein the inner peripheral surface is formed in a shape obtained by deforming a part of a circle based on an outer periphery of the frame-shaped lens.   The blocking ring according to claim 2, wherein the inner peripheral surface is formed in any one of an elliptical shape, an oval shape, and a polygonal shape.   The blocking ring according to claim 1, wherein the inner peripheral surface is formed in the same shape or a similar shape as the outer periphery of the frame-shaped lens.   The blocking ring according to any one of claims 1 to 4, wherein the inner peripheral surface is formed with a predetermined dimension or more inside from the outer periphery of the frame-shaped lens.   The blocking ring according to any one of claims 1 to 5, wherein the lens blank is formed so that the lens blank can be disposed in a state where the lens blank is inclined with respect to the fixing jig.   The blocking ring according to any one of claims 1 to 6, further comprising a through hole for injecting the bonding material or communicating the inner peripheral surface and the outer peripheral surface of the blocking ring.   The blocking ring according to any one of claims 1 to 7, wherein an outer peripheral surface of the blocking ring is formed in a circular shape that can be set on a blocker.   The blocking ring according to any one of claims 1 to 8, wherein the blocking ring is formed of a resin. A manufacturing method of a blocking ring for injecting a bonding material between one lens surface of a lens blank and a fixing jig for processing,
Setting the shape of the inner peripheral surface of the blocking ring to a circular shape or a non-circular shape that matches the outer periphery of the frame-shaped lens;
Forming the inner circumferential surface so as to have a set shape.   The manufacturing method of the blocking ring of Claim 10 including forming the outer peripheral surface of the said blocking ring in the circular shape which can be installed in a blocker.   The manufacturing method of the blocking ring of Claim 10 or Claim 11 which forms the said internal peripheral surface by dripping a liquid resin on a predetermined surface and solidifying it.   The said blocking ring is a manufacturing method of the blocking ring of Claim 12 including dripping and manufacturing the said liquid resin on the predetermined position of a blocker, or the said lens surface of the said lens blank. Manufacturing a lens blank;
Producing a blocking ring by the method for producing a blocking ring according to any one of claims 10 to 13,
Disposing the blocking ring between the lens surface of the lens blank and a fixing jig;
Injecting a bonding material inside the blocking ring and fixing the fixing jig to the lens blank;
And processing the lens blank using the fixing jig.

Images