JP6572166B2 - Lens holding jig and lens manufacturing method - Google Patents

Description

  The present invention relates to a lens holding jig and a lens manufacturing method using the lens holding jig.

A lens to be processed is attached to a processing apparatus such as a curve generator or a polishing apparatus, and the lens is processed by the processing apparatus.
In order to attach the lens to the processing apparatus, a holding portion called a yatoi is prepared, and the lens is fixed to the yatoi using a low melting point alloy.
To fix the lens to the Yatoi, mount the Yatoi and the blocking ring that surrounds the Yatoi on the mounting base, and place the lens with the protective film in close contact with the blocking ring. The enclosed space is filled with a molten low melting point alloy and solidified. In order to process the lens with the processing apparatus, the lens, the yatoi, the blocking ring and the low melting point alloy are removed from the mounting base.

Some blocking rings have a predetermined inner diameter and height (thickness dimension) corresponding to a lens diameter and a base curve (BC) (Patent Document 1).
In Patent Document 1, a plurality of types of blocking lenses having different inner diameters and heights are prepared in advance, and a blocking lens to be used is selected according to the lens diameter and the base curve.

Japanese Patent No. 4084081

The conventional example of Patent Document 1 targets a lens having a spherical convex surface, but some lenses have a complicated convex surface. For example, in the case of astigmatism prescription or progressive prescription on the convex surface, if the blocking ring of Patent Document 1 is used, the dimension between the inner peripheral edge of the blocking ring with which the lens abuts and the lens is different along the inner periphery of the ring. The lens cannot be stably supported by the ring.
Therefore, when the convex shape is not spherical or aspherical, a blocking ring in which the inner peripheral edge of the lens is matched with the convex shape must be separately manufactured.

  An object of the present invention is to provide a lens holding jig and a lens manufacturing method capable of reducing the processing cost of the lens.

The lens holding jig of the present invention is a lens holding jig for holding a lens, and the surface facing the lens is a second surface that is not on the same plane as the first surface and the first surface. at least have a bets, recesses on opposite sides is provided on the lens, said first surface and said second surface is the surface facing the lens, provided continuously across the straight boundary The boundary portion is provided in a radial direction with respect to the axis of the concave portion in plan view .

A lens having a free-form convex surface having no rotational symmetry, such as astigmatism or progressive, has a dimension parallel to an axis passing through the design center of the lens, that is, a lens height (sagittal height) along the circumferential direction. Here, the lens height refers to the height from the design standard specified by the manufacturer. The design standard means, for example, an optical center in a single focus lens. For example, the lens height is a distance on the circumference perpendicular to the optical center and including a vertex of the convex surface, which is a certain distance away from the optical center.
In the present invention, the part having a high lens height and the part having a low lens height are supported at different positions of at least one of the first surface and the second surface. In this case, at least one of the first surface and the second surface of the lens holding jig may have a gap between the convex surface of the lens except for the portion that supports the lens. Compared to a conventional blocking ring that is made constant, the lens can be stably supported by a lens holding jig.
Therefore, even if the convex shape is not spherical or aspherical, it is not necessary to separately prepare a blocking ring in which the inner peripheral edge of the lens is matched with the convex shape.

In the lens holding jig of the present invention, the first surface and the second surface can be connected.
In this configuration, since the first surface and the second surface are connected, the lens holding jig can be manufactured integrally.

In the lens holding jig of the present invention, the first surface and the second surface can each be a flat surface.
In this configuration, since the first surface and the second surface are flat surfaces, it is not necessary to match all the convex surfaces of the lens when manufacturing the lens holding jig. Can be simple.

In the lens holding jig of the present invention, a recess having a circular inner periphery in a plan view is formed across the first surface and the second surface, and a plane perpendicular to the axis of the recess is used as a reference surface. The distance from the reference surface between the first surface and the second surface is a jig distance, and at least one of the first surface and the second surface is a short portion where the jig distance is short and a long portion where the jig distance is long relative to the short portion An inclined surface can be formed between the two.
In this configuration, since the concave portion serves as a space for accommodating the tip portion of the convex surface of the lens, the lens can be held without interference of the tip portion of the convex surface.

In the lens holding jig of the present invention, the boundary portion between the first surface and the second surface can be configured to have the longest jig distance.
In this configuration, since the first surface and the second surface are abutted so as to form a mountain, for example, a lens having a rugby ball-shaped convex surface can be suitably supported.

In the lens holding jig of the present invention, the jig distance has a middle portion located between the long portion and the short portion, the first surface is a surface connecting the long portion and the middle portion, the second surface is It can be set as the structure which is a surface which connects a middle site | part and a short site | part.
In this configuration, since the first surface and the second surface are abutted so as to form a valley, a lens having a progressive surface formed on the outer surface can be favorably supported.

The lens manufacturing method of the present invention is a lens manufacturing method in which a lens to be processed is held by a holding unit, the lens is attached to a processing device via the holding unit, and the lens is processed by the processing device, In order to hold the lens by the holding unit, a step of installing the holding unit and a lens holding jig on an installation table; and installing the lens in the lens holding jig, the lens, the holding unit, Filling and solidifying the fixed material in a molten state in a space surrounded by the lens holding jig and the installation table, and the lens integrated with the fixing material from the installation table, the holding unit, and the Removing the lens holding jig, and the lens holding jig includes at least a first surface and a second surface that is not on the same plane as the first surface. Yes and A concave portion is provided on a surface facing the lens, and the first surface and the second surface are continuously provided across a linear boundary portion on the surface facing the lens, and the boundary portion is It is provided in a radial direction with respect to the axis of the concave portion in plan view .

In the present invention, the lens can be stably supported by the lens holding jig.
Therefore, since the holding portion and the lens can be securely attached via the fixing material, the lens can be manufactured with high accuracy.

1 shows a lens holding jig 1 according to a first embodiment of the present invention, in which (A) is a plan view of the lens holding jig, (B) is a sectional view taken along line BB, and (C) is a right side view. Figure. The perspective view of the jig | tool for lens holding. The graph which shows the relationship between the angle along the inner periphery of the jig | tool for lens holding, and the dimension from the virtual plane of a lens. (A) is sectional drawing which shows the state in which the lens holding jig and the holding part were installed in the installation stand, (B) is sectional drawing which shows the state in which the lens was attached to the holding part. The figure corresponding to FIG. 1 which shows the jig | tool for lens holding of 2nd Embodiment of this invention. The graph which shows the relationship between the angle from the inner periphery of a lens holding jig | tool, and the dimension from the virtual plane of the lens in a some lens. The figure which shows the side surface shape of the jig | tool for lens holding concerning the modification of this invention.

[First Embodiment]
Embodiments of the present invention will be described with reference to the drawings.
1 to 4 show a first embodiment of the present invention.
[Configuration of lens holding jig]
The lens holding jig 1 according to the first embodiment will be described with reference to FIGS. 1 to 3.
1 and 2 show the configuration of the lens holding jig 1. The lens L held by the lens holding jig 1 is a semi-finished lens used for manufacturing a spectacle lens.
1 and 2, the lens holding jig 1 is formed from a metal annular member.
The lens holding jig 1 includes a first surface 11 and a second surface 12 facing the lens L, a flat surface 13 formed on a surface opposite to the first surface 11 and the second surface 12, and a first surface It has a through hole 14 as a recess formed across the surface 11 and the second surface 12, and an outer peripheral surface 15 formed on the outer periphery of the first surface 11 and the second surface 12.

The flat surface 13 is formed without a step in order to face the flat surface of the installation table (see FIG. 4A). The plane 13 is orthogonal to the axis O of the through hole 14.
As shown in FIGS. 1A and 1B and FIG. 2, the lens holding jig 1 is formed with an attachment hole 10 </ b> A for attachment to the installation base.
The portion of the through hole 14 that faces the lens L constitutes a circular inner peripheral edge 14A, and a part of the inner peripheral edge 14A contacts the convex surface of the lens L.
A recess 10 </ b> R is formed in the first surface 11 for allowing the molten fixing material to flow from a predetermined position on the outer peripheral surface 15 toward the axis O of the through hole 14.

As shown in FIG. 1B, the through-hole 14 connects the large diameter portion 141 near the lens L, the small diameter portion 142 away from the lens L, and the large diameter portion 141 and the small diameter portion 142. And a spherical surface portion 143. The through-hole 14 becomes a space for accommodating the tip portion of the convex portion of the lens L.
Here, as shown in FIG. 2, in the first embodiment, when the plane 13 is the reference plane S and the distance from the reference plane S of the first surface 11 and the second surface 12 is the jig distance d, the first The surface 11 and the second surface 12 have a short portion 10L with a short jig distance d and a long portion 10H with a long jig distance d with respect to the short portion 10L.

As shown in FIG. 1C and FIG. 2, the first surface 11 and the second surface 12 are flat surfaces and are formed continuously. The term “continuous” means that the first surface 11 and the second surface 12 are connected at a predetermined angle.
The first surface 11 and the second surface 12 are inclined with respect to the reference surface S, respectively.
A boundary portion E between the first surface 11 and the second surface 12 is a straight line extending from the axis O in the radial direction. The boundary portion E has the longest jig distance d in the long portion 10H. That is, as shown in FIG. 1C, in the first embodiment, the lens holding jig 1 is formed in a mountain shape in a side view in which the boundary portion E becomes the top of a mountain and descends downward as the distance from the boundary portion E increases. ing.

In FIG. 1A, with the axis O of the through hole 14 of the lens holding jig 1 as the center, one of the two boundary portions E has an angle of 0 °, the other has an angle of 180 °, and the second surface 12 Of the inner peripheral edge 14A of the first surface 11 is 90 °, and the portion of the first surface 11 where the recess 10R is formed is 270 °, the position of the angle 0 ° and 180 ° is The jig dimension d is the highest position. The position at an angle of 90 ° is the lowest position on the second surface 12.
In order to set the lens L on the lens holding jig 1, the lens L is supported by one of the first surface 11 and the second surface 12, for example, the second surface 12. In this case, the other of the first surface 11 and the second surface 12, for example, the first surface 11 has a gap between the lens L, but the lens L is a second surface constituting half of the lens holding jig 1. Therefore, there is no inconvenience, or even if it is negligible.

In FIG. 3, a graph M shows the relationship between the angle along the inner peripheral edge 14 </ b> A of the lens holding jig 1 and the dimension of the lens L from the virtual plane. The inner peripheral edge 14A of the lens holding jig 1 has a diameter of 63 mm.
In FIG. 3, the horizontal axis is an angle along the inner peripheral edge 14A of the lens holding jig 1 corresponding to FIG. The vertical axis represents the dimension from the virtual plane V perpendicular to the axis O of the lens holding jig 1 to the convex surface of the lens L when the lens L is set on the lens holding jig 1.
In FIG. 3, the virtual plane V can be set as appropriate. In this embodiment, the virtual plane V is a plane orthogonal to the axis O and passing through the inner peripheral edge 14A of the lens holding jig 1 at an angle of 90 °. It is. The virtual plane V is a plane parallel to the reference plane S shown in FIG. In FIG. 3, the virtual plane V is a plane that passes through the inner peripheral edge 14A at an angle of 90 °. However, the virtual plane V may be a reference plane S, and is a plane that serves as a reference for the lens height, as will be described later. It may be a thing.

The lens L is a semi-finished lens used for manufacturing a progressive-power lens in which an already designed surface (or a non-processed surface) is previously subjected to ADD of 1.00 diopter and CYL of +2.00.
In the progressive-power lens, a distance portion, a near portion, and a progressive portion are formed on the concave surface, the convex surface, or the concave and convex surfaces. In the first embodiment, the height dimension of the lens is different in the circumferential direction.
Here, the lens height refers to the height from the design standard specified by the manufacturer. The design standard is, for example, the optical center for a single focus lens and the position specified by the manufacturer for a progressive power lens. The lens height is a distance on the circumference that is perpendicular to the design standard and includes a vertex of the convex surface of the lens and that is a certain dimension away from the design standard of the lens.
The lens L shown by the graph M is a region where the range from the angle 0 ° to the angle 180 ° is supported by the distance portion, and the range from the angle 180 ° to 360 ° (0 °) is supported by the near portion. It is an area.

In FIG. 3, the dimensions of the inner peripheral edge 14 </ b> A of the lens holding jig 1 and the virtual plane V are indicated by a graph N. Both the graph M and the graph N have the same value when the angle is 0 °, the dimensions from the virtual plane V become smaller from the angle 0 ° to the angle 90 °, and become the same value at the angle 90 °. Furthermore, the dimension from the virtual plane V increases from the angle 90 ° to the angle 180 °, and becomes the same value at the angle 180 °. From the angle 180 ° to the angle 270 °, the dimension from the imaginary plane V becomes smaller, and becomes the same 0 at the angle 270 °. Furthermore, the dimension from the virtual plane V increases from an angle 270 ° to 360 ° (0 °), and the same value is obtained at an angle 360 ° (0 °).
The graph M and the graph N are symmetrical with respect to the angle 90 ° in the range from the angle 0 ° to the angle 180 °, and symmetrical with respect to the angle 270 ° in the range from the angle 180 ° to the angle 360 °. is there.

As shown in FIG. 1A, in the first embodiment, when the lens L is supported by the first surface 11, the boundary portion E and the angle 270 at the angle 0 ° and the angle 180 ° of the first surface 11. When the lens L is supported by a half of the lens L at three points with a position at a angle and the lens L is supported by the second surface 12, the angle 0 ° and the angle 180 of the second surface 12 are used. The half of the lens L with the distance portion is supported at three points, that is, the boundary portion E at the angle and the position at the angle of 90 °.
Here, as shown in FIG. 3, a gap t is generated between the graph M and the graph N, but since the size is 0.5 mm or less, the lens L is supported on the lens holding jig 1. Stabilize. Furthermore, even if there is a gap t, the molten fixing material m does not leak due to its surface tension.
Since the angle 270 ° is a position corresponding to the concave portion 10R of the first surface 11 (see FIG. 1A), the dimension between the inner peripheral edge 14A and the virtual plane V in the case of the angle 270 ° is small. In FIG. 3, the graph N is shown without the recess 10 </ b> R.

[Lens manufacturing method]
Next, the lens manufacturing method of this embodiment is demonstrated based on FIG.
In the present embodiment, a lens L to be processed is attached to a processing apparatus (not shown), and the lens L is processed by the processing apparatus to manufacture a spectacle lens.
[Lens holding jig installation process]
First, a process of installing the holding unit 2 and the lens holding jig 1 on the installation table 3 will be described.
As shown in FIG. 4A, the holder 2 and the lens holding jig 1 are installed on the installation table 3, and the lens L to be processed is further installed on the lens holding jig 1. A film (not shown) may be interposed between the lens L and the lens holding jig 1.
The installation table 3 is arranged such that the plane thereof is inclined in the paper surface penetration direction of FIG. The holding part 2 is a stainless steel yatoi formed in a cup shape, and includes a disk part 21 and a protruding part 22 formed integrally with the disk part 21. The protrusion 22 is fitted into the recess 3 </ b> A of the installation table 3.

When the lens holding jig 1 is installed on the installation table 3, the annular center of the lens holding jig 1 coincides with the center of the holding part 2, and the concave portion 10R formed on the first surface 11 is positioned above. When the lens L is installed on the lens holding jig 1, a portion corresponding to the distance portion of the lens L is brought into contact with the second surface 12, and a portion corresponding to the near portion is opposed to the first surface 11. Let
The lens holding jig 1 is fixed to the installation table 3.

The molten fixing material m is surrounded by the lens L, the holding portion 2, the through hole 14 of the lens holding jig 1, and the installation base 3 from the concave portion 10R (see FIG. 1A) of the lens holding jig 1. Fill the space. Here, the fixing material is a low melting point metal.
Since the plane of the mounting table 3 is inclined downward, the molten fixing material m flowing from the upper concave portion 10R is mainly formed in the through holes 14 corresponding to the second surface 12 of the lens holding jig 1. The area from the bottom to the center is filled. As time passes, the fixing material m is cooled and solidified.

[Lens holding jig removal process]
The lens L, the holding part 2, and the lens holding jig 1 which are integrated with the fixing material m are removed from the installation base 3.
[Processing process]
FIG. 4B shows a state where the lens L is attached to the holding portion 2.
As shown in FIG. 4B, the holding unit 2 to which the lens L is attached is set in a processing apparatus (not shown). The processing apparatus is, for example, a curve generator that performs three-dimensional NC control.
The processing device is driven to process the surface of the lens L with a tool or the like (not shown).
In the state where the processing is completed, the lens L remains fixed to the holding portion 2 with the fixing material m. Therefore, heat is applied to the fixing material m to remove the lens L from the holding unit 2. Thereafter, the lens L is processed to manufacture a spectacle lens.

[Effect of the first embodiment]
In the first embodiment, the following effects can be achieved.
(1) As shown in FIGS. 1 and 2, the lens holding jig 1 includes a first surface 11 and a second surface 12 that is not flush with the first surface 11. Have. The first surface 11 and the second surface 12 may have a gap t between the convex surface of the lens L except for the portion that supports the lens L (see FIG. 3), but the gap between the lens L and the convex surface. Is smaller than a conventional blocking ring having a constant thickness dimension, and the lens L can be reliably held by the lens holding jig 1.

(2) Since the first surface 11 and the second surface 12 are connected as shown in FIGS. 1 and 2, the structure of the lens holding jig 1 can be simplified.
(3) As shown in FIGS. 1 and 2, the first surface 11 and the second surface 12 are each composed of a flat surface. From this point as well, the structure of the lens holding jig 1 can be simplified. .

(4) Since the boundary E between the first surface 11 and the second surface 12 has the longest jig distance d as shown in FIG. 2, the convex surface can favorably support the lens L having a rugby ball shape.
(5) As shown in FIG. 2, both the first surface 11 and the second surface 12 form an inclined surface between the short portion 10L and the long long portion 10H where the jig distance d is short. In a semi-finished lens for manufacturing a refractive lens, for example, a portion corresponding to the near portion can be supported by the first surface 11 and a portion corresponding to the far portion can be supported by the second surface 12.

(6) As shown in FIG. 4, the lens L to be processed is held by the holding unit 2, the lens L is attached to the processing device via the holding unit 2, and the lens L is held by the processing device for processing. The step of installing the part 2 and the lens holding jig 1 on the installation table 3, the lens L is installed on the lens holding jig 1, the lens L, the holding unit 2, the lens holding jig 1 and the installation table 3. A step of filling and solidifying the fixed material m in a molten state in the space surrounded by the step, and a step of removing the lens L, the holding unit 2 and the lens holding jig 1 integrated with the fixing material m from the installation base 3. Therefore, the lens L can be securely attached to the holding portion 2 via the fixing material m. And even if the molten fixing material m is allowed to flow between the lens L and the lens holding jig 1, these gaps are small, so that they do not leak due to surface tension, or even if they leak Few. Therefore, the holding part 2 and the lens L can be reliably attached via the fixing material m.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIGS.
The second embodiment is different from the first embodiment in that the lens holding jig is formed in a valley shape, and other configurations are the same as those of the first embodiment. The lens manufacturing method is the same as that in the first embodiment. In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.
In FIG. 5, the lens holding jig 4 is a metal annular member, and includes a first surface 41 and a second surface 42 that face the lens L, respectively.
The lens L is an outer surface progressive lens in which a distance portion and a near portion are formed on a convex surface.

As shown in FIG. 5, also in the second embodiment, when the flat surface 13 is the reference surface S and the distance from the reference surface S of the first surface 41 and the second surface 42 is the jig distance d, the lens holding jig is used. The tool 4 has a long portion 40H having a long jig distance d, a short portion 40L having a short jig distance d, and a middle portion 40M having a middle jig distance d.
The first surface 41 is a surface that connects the long portion 40H and the middle portion 40M, and the second surface 42 is a surface that connects the middle portion 40M and the short portion 40L.
In the second embodiment, in the lens holding jig 4, the boundary portion E between the first surface 41 and the second surface 42 is a valley.

In FIG. 6, the dimension from the virtual plane V to the convex surface of the lens L is indicated by M. The dimension of the inner peripheral edge 14A of the first surface 41 and the second surface 42 and the virtual plane V is indicated by N.
The graph M is a region in which the region from the angle 0 ° to the angle 180 ° shown in the left half of FIG. 6 is supported by the distance portion, and is symmetrical with respect to the angle 90 °. The graph M is an area where the angle 180 ° to 360 ° (0 °) shown in the right half of FIG. 6 is supported by the near portion.
The lens L in FIG. 6 is an example in the case of manufacturing a progressive addition lens (trade name Summit Premium 1.67: manufactured by HOYA Corporation) having an addition power of 4.00 and a refractive index of 1.67.
A plurality of lens holding jigs 4 having an inner diameter corresponding to the diameter of the lens L are prepared in order to reliably support the lens L having a plurality of diameters.

In order to support the lens L having a diameter of more than 73 mm, a lens holding jig 4 (see FIG. 5) having an inner peripheral edge 14A having the same diameter as the lens (for example, 73 mm) is used. In this case, as shown in FIG. 6, the relationship between the dimension and the angle between the convex surface of the lens L and the virtual plane V is shown by a graph M11, and the relationship between the dimension and the angle between the inner peripheral edge 14A and the virtual plane V is a graph. Indicated by N11.
In order to support the lens L having a diameter of more than 68 mm, the lens holding jig 4 (see FIG. 5) having an inner peripheral edge 14A of 68 mm in diameter is used. In this case, as shown in FIG. 6, the relationship between the dimension and the angle between the convex surface of the lens L and the virtual plane V is shown by a graph M12, and the relationship between the size and the angle between the inner peripheral edge 14A and the virtual plane V is a graph. Indicated by N12.

Similarly, when supporting a lens L having a diameter of more than 63 mm, the graph M13 and the graph N13 are applicable.
When supporting a lens L having a diameter of more than 61 mm, the graph M14 and the graph N14 are applicable.
When supporting a lens L having a diameter of more than 58 mm, the graph M15 and the graph N15 are applicable.
When supporting a lens L having a diameter of more than 53 mm, the graph M16 and the graph N16 are applicable.
In the example of FIG. 6, the lens L is held by the first surface 41. In any of the examples, the lens L is the first in the vicinity of an angle of 180 °, an angle of 270 °, and an angle of 360 °. Supported by surface 41.
As shown in FIG. 5, in the second embodiment, as in the first embodiment, the lens L is supported by the inner peripheral edge 14A of the first surface 41 at three points of an angle of 0 °, an angle of 90 °, and an angle of 180 °. The inner peripheral edge 14A of the second surface 42 is supported at three points of an angle of 180 °, an angle of 270 °, and an angle of 360 ° (0 °).

[Effects of Second Embodiment]
Therefore, in 2nd Embodiment, there can exist the following effect besides having the same effect as (1)-(3) (5) (6) of 1st Embodiment.
(7) As shown in FIG. 5, the lens holding jig 4 has a long portion 40H, a short portion 40L, and a middle portion 40M, and the first surface 41 connects the long portion 40H and the middle portion 40M. The second surface 42 is a surface connecting the middle part 40M and the short part 40L. For this reason, a valley is formed at the boundary portion E between the first surface 41 and the second surface 42, and a lens having a progressive surface formed on the outer surface can be suitably supported.

It should be noted that the present invention is not limited to each embodiment, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention.
For example, in the first embodiment, as shown in FIGS. 1 and 2, the long part having the longest jig distance d is at the boundary E between the first surface 11 and the second surface 12. In the invention, as shown in FIG. 7A, the long part having the longest jig distance d may be formed in the entire region of the first surface 11.
Furthermore, in 2nd Embodiment, as FIG. 5 shows, the 1st surface 41 is made into the surface which connects the long site | part 40H and the middle region 40M, and the 2nd surface 42 is made into the surface which connects the middle site | part 40M and the short site | part 40L. The lens holding jig 4 is formed in a side-valley shape. In the present invention, as shown in FIG. 7B, the boundary portion E between the first surface 41 and the second surface 42 is the shortest portion 40L. The position farthest from the boundary portion E of the first surface 41 and the position farthest from the boundary portion E of the second surface may be a portion where the jig distance d is longer than the short portion 40L.
Further, as shown in FIGS. 1, 2 and 5, the lens holding jigs 1 and 4 have a configuration in which the lens L has the first surfaces 11 and 41 and the second surfaces 12 and 42. Then, in addition to these surfaces, a surface facing the lens L may be formed. For example, as shown in FIG. 7C, the third surface 130 facing the lens L may be connected to the first surface 11.

In the embodiment, the concave portions formed in the lens holding jigs 1 and 4 are the through holes 14. However, in the present invention, the annular members constituting the lens holding jigs 1 and 4 instead of the through holes 14. It is good also as a recessed part which block | closed the hole part. That is, in each embodiment, since the lens holding jigs 1 and 4 and the holding portion 2 are separate members, the concave portion is the through hole 14, but in the present invention, the outer diameter of the holding portion 2 is increased, It is good also as a structure which closes the hole formed in an annular member with this holding | maintenance part 2. FIG.
Although the lens holding jig 1 is made of metal, it may be made of synthetic resin, for example, other than metal.

In the embodiment, the lens L to be processed is a semi-finished lens for spectacle lenses, but the present invention is not limited to this, and can be applied to, for example, a lens used in an optical apparatus.
Furthermore, in the embodiment, as shown in FIGS. 1, 2, and 5, the first surface 11, 41 and the second surface 12, 42 are connected and formed, but there is a gap between them. It may be formed.

  In addition, as shown in FIGS. 1, 2 and 5, the first surfaces 11 and 41 and the second surfaces 12 and 42 are each configured from a plane, but may be configured from a curved surface. That is, as long as the lens L is supported at a plurality of points on each of the first surfaces 11 and 41 and the second surfaces 12 and 42, the number of supported points is not limited.

[Summary]
[Claim 1]
In the lens holding jigs 1 and 4 for holding the lens L, the surfaces facing the lens L are the first surface 11 and 41 and the second surface 12 that is not on the same surface as the first surface 11 and 41. , 42 at least.
[Claim 2]
The lens holding jig according to claim 1, wherein the first surfaces 11 and 41 and the second surfaces 12 and 42 are continuous.
[Claim 3]
3. The lens holding jig according to claim 1, wherein the first surfaces 11 and 41 and the second surfaces 12 and 42 are flat surfaces.
[Claim 4]
4. The lens holding jig according to claim 3, wherein a recess 10R having a circular inner peripheral edge 14A in a plan view is formed across the first surface 11, 41 and the second surface 12, 42, and the axial center of the recess 10R. A plane orthogonal to O is defined as a reference plane S, a distance between the first plane 11, 41 and the second plane 12, 42 from the reference plane S is defined as a jig distance d, and the first plane 11, 41 and the second plane 12 are set. , 42 is configured to form an inclined surface between the short portions 10L, 40L having a short jig distance d and the long portions 10H, 40H having a long jig distance d with respect to the short portions 10L, 40L. Characteristic lens holding jig.
[Claim 5]
5. The lens holding jig according to claim 4, wherein a boundary distance E between the first surface 11 and the second surface 12 has the longest jig distance d.
[Claim 6]
5. The lens holding jig according to claim 4, wherein the jig distance d has a middle part 40 </ b> M located between the long part 40 </ b> H and the short part 40 </ b> L, and the first surface 41 has the long part 40 </ b> H and the middle part 40 </ b> M. A lens holding jig, wherein the second surface 42 is a surface connecting the middle portion 40M and the short portion 40L.
[Claim 7]
A lens manufacturing method in which a lens to be processed is held by the holding unit 2, the lens L is attached to the processing device via the holding unit 2, and the lens L is processed by the processing device, and the lens L is held by the holding unit 2 In order to achieve this, the step of installing the holding unit 2 and the lens holding jigs 1 and 4 on the installation table 3, the lens L is installed on the lens holding jigs 1 and 4, the lens L, the holding unit 2, and the lens holding unit A step of filling and solidifying the fixed material m in a molten state into a space surrounded by the jigs 1 and 4 and the installation table 3; a lens L integrated from the installation table 3 by the fixing material m; the holding unit 2; A step of removing the lens holding jigs 1 and 4. The lens holding jigs 1 and 4 have the same surfaces facing the lens L as the first surfaces 11 and 41 and the first surfaces 11 and 41. And having at least a second surface 12, 42 not on the surface. Lens manufacturing how.

  INDUSTRIAL APPLICABILITY The present invention can be used for a spectacle lens and a jig for holding other lenses in order to manufacture a lens.

  DESCRIPTION OF SYMBOLS 1,4 ... Lens holding jig, 10H ... Long part, 40H ... Long part, 10L ... Short part, 40L ... Short part, 10R ... Concave part, 11, 41 ... First surface, 12, 42 ... Second surface, DESCRIPTION OF SYMBOLS 13 ... Plane, 14 ... Through-hole (concave part), 14A ... Inner periphery, 2 ... Holding part, 3 ... Installation stand, 40M ... Middle part, E ... Boundary part, L ... Lens, m ... Fixing material, S ... Reference plane , V: virtual plane, d: jig distance

Claims (6)

A lens holding jig for holding a lens,
The surface facing the lens, and the first surface, at least possess a second surface not on the same plane as the first surface,
A recess is provided on the surface facing the lens,
The first surface and the second surface are continuously provided across a linear boundary portion on the surface facing the lens,
The lens holding jig , wherein the boundary portion is provided in a radial direction with respect to an axis of the concave portion in a plan view . The lens holding jig according to claim 1 ,
The first surface and the second surface are flat surfaces, respectively. The lens holding jig according to claim 2 ,
The recess, have a circular inner periphery in plan view spans and the second surface and the first surface,
Wherein a plane reference surface perpendicular to the axis of the recess, the distance from the reference plane of the front Symbol the second surface and the first surface and the jig distance,
At least one of the first surface and the second surface forms an inclined surface between a short portion where the jig distance is short and a long portion where the jig distance is long with respect to the short portion. Lens holding jig. The lens holding jig according to claim 3 ,
The lens holding jig, wherein a boundary between the first surface and the second surface has the longest jig distance. The lens holding jig according to claim 3 ,
The jig distance has a middle part located between the long part and the short part, the first surface is a surface connecting the long part and the middle part, and the second surface is the middle part. A lens holding jig, which is a surface connecting a part and the short part. A lens manufacturing method in which a lens to be processed is held by a holding unit, the lens is attached to a processing device via the holding unit, and the lens is processed by the processing device,
In order to hold the lens by the holding unit,
Installing the holding unit and the lens holding jig on an installation table;
Installing the lens in the lens holding jig, filling and solidifying a molten fixing material in a space surrounded by the lens, the holding unit, the lens holding jig, and the installation table; and
Removing the lens integrated with the fixing material, the holding portion and the lens holding jig from the installation base,
The lens holding jig, the lens surface facing the at least possess a second surface not on the same plane and the and the first surface the first surface, the recess is provided on the surface facing the lens The first surface and the second surface are continuously provided across a linear boundary portion on a surface facing the lens, and the boundary portion is in plan view with respect to the axis of the recess. A lens manufacturing method characterized by being provided in a radial direction .

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