JP2004216545A - Polishing tool, polishing device and polishing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a polishing tool, a polishing device and a polishing method for improving polishing capability and polishing time by making the polished surface of an optical lens in almost uniform abutment on the polishing tool when polishing the optical lens having the inclined polished surface. <P>SOLUTION: The polishing tool has a fixing portion for holding a block tool in use for mounting the optical lens on a polisher for polishing it and a mounting portion for mounting it on the polishing device. It is used for polishing the optical lens mounted thereon in such a manner as to offset the inclination of the polished surface. Thus, the polished surface has almost uniform abutment on the polishing tool to improve polishing capability and polishing time. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

  The present invention relates to a polishing jig, a polishing apparatus, and a polishing method.

  Conventionally, as described in Patent Document 1, polishing of spectacle lenses is performed using a block jig for chucking a lens before polishing called a semi-finished lens having a larger thickness than a finished dimension to a processing machine. After fixing the semi-finished lens fixed to this block jig to a nearly desired shape according to the spectacle prescription of the wearer, sanding similar to lapping Hanging and polishing have been performed to precisely finish the optical surface of the lens. In the sanding process and the polishing process, as shown in FIG. 9A, the concave surface 331 of the lens substrate 33 and the rigid polishing tool 52 having a convex surface of the same shape are combined with a liquid mainly composed of water or polishing. The concave surface 331 of the lens substrate 33 is mirror-finished by rubbing while interposing an agent.

  Further, in recent years, a surface shape such as an axisymmetric aspheric surface, an aspheric astigmatic surface, a progressive surface, and a surface in which a toric surface and a progressive surface are combined according to the spectacle prescription of the wearer on the eyeball side surface of the eyeglass lens. High value-added lenses to be provided are also being produced. These so-called free-form surfaces cannot be continuously rubbed over the entire surface by a rigid polishing tool 52 having a convex surface having the same shape as the concave surface of the lens. For this reason, as shown in FIG. 9B, the concave surface 331 of the lens substrate 33 and the polishing tool 22 provided with an elastic sheet (elastic body) are rubbed with each other with an abrasive interposed therebetween, thereby achieving a mirror finish. Is going. Since the elastic sheet of the polishing tool 22 is an elastic body, it can be rubbed while deforming following the shape of the concave surface 331 of the lens substrate 33, and can polish a free-form surface. Patent Literature 2 and Patent Literature 3 can be exemplified as a method of performing a polishing process according to such a work shape.

JP-A-47-14776 JP-A-8-206952 JP 2003-275949 A

  However, when the processing surface is a free-form polishing surface, the elastic sheet of the polishing tool is rubbed while deforming the elastic sheet so as to follow the shape of the lens concave surface, so that the force distribution is not uniform. At this time, as shown in FIG. 9C, in particular, in the case of a lens whose polished surface is typified by a prism eyeglass prescription lens or a progressive power lens in which the thickness of the lens differs between the distance side and the near side, Then, a portion 331A where the polishing tool strongly contacts the elastic sheet and a portion 331B where the contact is weak or the polishing tool does not contact the elastic sheet are generated. When polishing is performed in accordance with the portion 331A having a strong contact, the portion 331B having a weak contact is not sufficiently polished. In addition, when polishing is performed in accordance with the weak contact portion 331B, it takes a long time to obtain a finished surface, and the polishing of the strong contact portion 331A proceeds excessively, and a shape change called sag increases. Had a problem.

  In addition, since the contact between the elastic sheet of the polishing tool and the lens to be processed is not uniform, excessive forces are applied to each other by rubbing, and the lens to be processed is detached from the polishing apparatus, and the lens to be processed itself is damaged, or the polishing tool is damaged. However, there is a problem that the tool life is shortened and the tool life is shortened.

  These problems are not limited to spectacle lenses, but can occur in all optical lenses when polishing by polishing with a polishing tool.

  SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides a polishing jig and a polishing apparatus capable of making a polishing surface of a lens to be processed (optical lens) substantially uniformly contact with a polishing tool. An object of the present invention is to provide a polishing method that shortens polishing time, reduces damage to a lens to be processed, and improves the life of a polishing tool using a jig.

  The present inventor has conducted intensive studies to achieve the above object, and as a result, in order to make the surface to be polished of the optical lens and the polishing tool almost uniformly contact, the inclination of the surface to be polished of the optical lens or the thickness of the optical lens It is effective to incline the optical lens so that the difference is corrected. For this purpose, the block jig to which the optical lens is fixed is inclined at a predetermined angle and fixed, and is attached to the polishing apparatus in that state. It has been found that it is effective to use a polishing jig.

The polishing jig of the present invention is a polishing tool for polishing a polishing tool having a dome-shaped elastic body by pressing the elastic body against a surface to be polished of an optical lens while applying tension to the elastic body with a pressure fluid. An apparatus body, a polishing jig for fixing a block jig to which an optical lens is fixed, comprising: a fixing portion for fixing the block jig; and a mounting portion mounted on a chuck of the polishing apparatus, The surface of the fixing portion that defines the inclination of the block jig and the surface of the mounting portion where the inclination is defined by the chuck are formed at a predetermined angle.
According to the present invention, the polishing jig has a fixing portion for fixing the block jig to which the optical lens is fixed, and a mounting portion for mounting the polishing jig to the chuck of the polishing apparatus. A surface defining the inclination (hereinafter referred to as a fixed surface) and a surface defining the inclination of the mounting portion (hereinafter referred to as a mounting surface) have a predetermined angle. When fixing the block jig to which the optical lens is fixed to the polishing jig, if the fixing surface of the polishing jig and the inclination of the surface to be polished of the optical lens are fixed in directions that cancel each other out, the surface to be polished may hit the polishing tool. Is improved, and the entire polished surface can be polished more uniformly. As a result, it is possible to prevent a change in shape called sagging and the occurrence of polishing residue. Further, since the polishing can be performed uniformly, the time required until the entire surface to be polished is finished to a desired surface is also reduced.
Further, since the surface to be polished of the optical lens and the polishing tool are in natural contact with each other, problems such as the optical lens being detached from the polishing apparatus and being damaged, and the polishing tool being damaged and the tool life being shortened are improved.
Further, if the shape of the mounting portion of the polishing jig is the same as the shape of the block jig, the polishing jig according to the present invention can be used without changing the structure of the polishing apparatus body to which the block jig is directly mounted. A tool can be mounted, and the contact between the optical lens and the polishing tool can be made substantially uniform. Therefore, for an optical lens having a small inclination of the surface to be polished or an optical lens having a small difference in thickness, the polishing jig according to the present invention is not used, and the block jig to which the optical lens is fixed may be directly mounted on the polishing apparatus. Processing is possible with a common polishing device.

At this time, the angle formed by the surface defining the inclination of the block jig in the fixing part and the surface of the mounting part whose inclination is regulated by the chuck is at least the prism amount of the optical lens, the addition, and the angle of the astigmatic axis. It is preferable to be determined based on any one of the following.
According to this aspect of the invention, the surface defining the inclination of the block jig in the fixed portion and the chuck in the mounting portion based on any one of the prism amount of the optical lens, the addition, and the angle of the astigmatic axis. Since the angle between the surface where the inclination is restricted is set, the angle between the surface that defines the inclination of the block jig in the fixed portion and the surface where the inclination is restricted by the chuck in the mounting portion is the angle of the optical lens. This corresponds to the inclination of the surface to be polished. Thereby, the polished surface of the optical lens can be more accurately polished.

Further, the polishing apparatus of the present invention is a polishing apparatus for polishing an optical lens, in which a tension is given by a pressure fluid, a polished surface of the optical lens is pressed, and a dome-shaped elastic body is polished. A polishing apparatus main body including a resilient tool including: a chuck to which the optical lens is attached; and a polishing jig for fixing a block jig to which the optical lens is fixed to the polishing apparatus main body, wherein the polishing jig Is a polishing jig described above.
According to such a polishing apparatus of the present invention, since any one of the polishing jigs described above is provided, the same effect as that of the polishing jig can be obtained. That is, the contact between the polished surface of the optical lens and the polishing tool can be made substantially uniform, so that the polishing time can be reduced, the damage of the optical lens can be reduced, and the life of the polishing tool can be improved.

  Further, the polishing method of the present invention is a polishing method in which the elastic substrate is pressed against the surface to be polished of the optical lens and polished while applying tension to the dome-shaped elastic substrate composed of the elastic sheet with a pressure fluid. The polishing is performed using the polishing apparatus described above, and the polishing is performed by fixing the optical lens so that the surface to be polished of the optical lens has a predetermined inclination.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings, taking polishing of a spectacle lens as an optical lens as an example, but the present invention is not limited to the following embodiments.

  1 to 7 show an embodiment of the present invention. FIG. 1 is a diagram showing a polishing apparatus of the present invention, FIG. 2 is a schematic diagram showing a polishing tool, and FIG. FIG. 4 is a flowchart showing a lens manufacturing process, FIG. 5 is a semi-finished lens blocking process, FIG. 6 is a shape creation process, and FIG. 7 is a schematic diagram of a polishing process.

FIG. 1 is a view showing a polishing apparatus 2 of the present invention. The polishing device 2 is a device for polishing a surface to be polished of a spectacle lens (lens base material) 33, and a rotatably holding the spectacle lens 33 attached to a block jig 40 (see FIG. 2). Polishing object holder 21, Polishing tool 22 for polishing spectacle lens (lens base material) 33 held by object holder 21, Polishing tool driver 23 for driving polishing tool 22, Polishing liquid for supplying polishing liquid A polishing apparatus main body 20 having a supply unit 24 (see FIG. 2) and a polishing jig 1 attached to a chuck 212C of a workpiece holding unit 21 are provided.
As shown in FIG. 2, the polishing tool 22 of the polishing apparatus main body 20 is driven to rotate by a polishing tool driving unit 23 and has a cylindrical portion 221 having a compressed air flow path formed therein, and a cylindrical portion 221. And a hollow dome-shaped elastic body 222 provided at the front end of the body.
Compressed air, which is a pressure fluid, is fed into the elastic body 222, and the load on the spectacle lens (lens base material) 33 can be adjusted by adjusting the pressure of the air inside. A polishing pad (not shown) is attached to the surface of the elastic body 222.

  The polishing tool drive unit 23 has a turntable 231 that is driven to rotate about a vertical axis by a motor (not shown) or the like. The lower end of the cylindrical portion 221 of the polishing tool 22 is detachably attached to the turntable 231. By mounting the polishing tool 22 on the turntable 231, the polishing tool 22 is rotated about the central axis of the cylindrical portion 221, that is, the center of curvature C 1 of the dome-shaped portion of the elastic body 222 and the dome-shaped portion. Will rotate at a predetermined number of revolutions with the line connecting the vertices of the circles as the rotation axis. The rotary table 231 is provided with a compressed air pipe (not shown) and communicates with the compressed air flow path of the cylindrical portion 221 of the polishing tool 22.

The object-to-be-polished holding unit 21 includes a swing drive device 211 and a workpiece-to-be-polished holding device 212 driven by the swing drive device 211.
The swing drive device 211 drives a crank 211B rotated by a motor 211A by belt transmission, and swings a workpiece holding device 212 connected to the crank 211B by a connecting rod 211C.
The object-to-be-polished holding device 212 is swingable in the front-back direction between a vertical direction and a rearward inclination angle around a swing shaft 212E. The object-to-be-polished holding device 212 is provided with a vertically downward air cylinder 212A at an upper portion thereof, and a chuck 212C to which the polishing jig 1 is attached at the tip of a piston rod 212B of the air cylinder 212A. The chuck 212C is rotationally driven by a motor 212D with an axis passing through a point at which an oscillating shaft 212E and a central axis of the cylindrical portion 221 of the polishing tool 22 intersect as a rotation axis.
As shown in FIG. 2, such an object-to-be-polished holding device 212, that is, the swing center C <b> 2 of the spectacle lens (lens base) 33 and the center of curvature C <b> 1 of the elastic body 222 of the polishing tool 22 are substantially equal to each other. I do. By doing so, the adhesion between the polished surface of the spectacle lens 33 and the surface of the elastic body 222 can be kept constant, and uniform polishing can be performed.

The polishing jig 1 is for attaching a block jig 40 to which a spectacle lens (lens base material) 33 as an optical lens is fixed to a chuck 212C of the polishing apparatus main body 20, as shown in FIGS. And a mounting portion 11 and a fixing portion 13. The mounting surface 12 provided on the mounting portion 11 in the drawing is a surface that defines the inclination of the polishing jig 1 when the polishing jig 1 is mounted on the chuck 212 </ b> C of the polishing apparatus 2.
The mounting portion 11 has a substantially truncated conical shape, and has a notch 111 formed on the upper surface thereof. The shape of the mounting portion 11 is the same as the shape of a block jig 40 described later. That is, the polishing jig 1 can be mounted on the chuck 212C of the polishing apparatus main body 20 to which the block jig 40 is directly mounted conventionally.

The fixing portion 13 has a substantially columnar shape, and has a recess 131 formed therein for accommodating a block jig 40 described later. A fixing screw 15 for fixing the block jig 40 to the fixing portion 13 is attached to the fixing portion 13. The fixing screw 15 is inserted into the recess 131 from a direction orthogonal to the insertion direction of the block jig 40, and presses the block jig 40 against the inner surface of the recess 131 to fix the block jig 40 in the recess 131.
Although one fixing screw 15 is provided here, the present invention is not limited to this, and two or more fixing screws 15 may be provided. In this way, the center of the concave portion 131 of the mounting portion 11 and the center of the block jig 40, that is, the center of the lens substrate 33 can be surely matched. Further, as long as the block jig 40 can be fixed to the fixing portion 13, the block jig is not limited to the fixing screw, and is arbitrary. For example, a method using vacuum suction can be proposed.

The fixing surface 14 provided on such a fixing portion 13 is a surface that defines the inclination of the block jig 40 when the block jig 40 to which the lens substrate 33 is fixed is fixed. The fixing surface 14 and the mounting surface 12 are formed with a predetermined inclination so as to offset the inclination and the difference in thickness of the polished surface of the spectacle lens (lens substrate) 33. This inclination is desirably formed and selected according to the prism amount of the spectacle lens, the addition power, and the angle of the astigmatic axis. For example, it is preferable to determine the inclination in accordance with the angle of the astigmatic axis of 70 ° or more and 110 ° or less. Further, it is preferable to determine the inclination in accordance with the addition power of 3.00 diopters or less.
For example, in the case of a spherical spectacle lens having a refractive power of 1.60 and a prism amount of 1 prism, since the concave surface has an inclination of 0.95 degrees with respect to the convex surface, polishing having the same inclination is performed. Use a jig. By preparing a polishing jig for each inclination of up to 10 prisms in the same manner, it is possible to substantially cope with the polishing of prism eyeglass prescription lenses. As for the selection of the polishing jig, it is also possible to use one polishing jig for a certain spectacle prescription range for general use. For example, in the case of a lens having a refractive power of 1.60, if one polishing jig is used to handle spectacle prescriptions of 2 prisms to 5 prisms, the inclination of the two prisms is 1.91 degrees, and the inclination of the five prisms is 4. Since the angle is 77 degrees, the use of a polishing jig formed at an intermediate inclination of 3.34 degrees can substantially correspond to spectacle prescription of 2 prisms to 5 prisms.

From now on, the flow up to the polishing step using the polishing jig 1 according to the present invention will be described in order. FIG. 4 is a flowchart showing a flow up to the polishing step.
First, the semi-finished lens 31 is fixed to the block jig 40 (blocking step, processing S1).

  FIG. 5 shows a step of fixing the semi-finished lens 31 to a block jig 40 for mounting on a processing machine such as a shape creating apparatus or a polishing apparatus 2, and positioning the semi-finished lens 31 on the block jig 40. While maintaining these positions, for example, a melted low melting point alloy 41 is poured between them and solidified, and the semi-finished lens 31 is fixed to the block jig 40. Examples of a method for fixing the block jig 40 and the semi-finished lens 31 include a low melting point alloy, wax, vacuum suction, and the like.

  In the next shape creation step, as shown in FIG. 6, the block jig 40 to which the semi-finished lens 31 is attached is attached to a chuck 42 of a shape creation device (not shown), and the concave surface 311 of the semi-finished lens 31 is cut or ground. To manufacture a lens substrate 33 which is an optical lens (eyeglass lens) created on a desired refraction surface (process S2).

  FIG. 7 is a view showing an example of a step of polishing the lens base material 33 (process S3). The block jig 40 to which the lens base material 33 is fixed is fixed to the polishing jig 1, and the polishing jig 1 is further fixed. FIG. 6 is a diagram in which a surface to be polished is pressed against a polishing tool 22 in a state where the device is mounted on a chuck 212C of the polishing apparatus 2.

The polished surface created by cutting or grinding has an inclination with respect to the block jig 40 like the lens substrate 33 according to the spectacle prescription of the wearer. The polishing jig 1 is used to correct this inclination. First, the block jig 40 is fitted into the fixing portion 13 of the polishing jig 1, and the block jig 40 is fixed with the fixing screw 15. At this time, since the mounting surface 12 and the fixing surface 14 are inclined, the inclination of the polished surface of the lens substrate 33 is fixed in a direction that cancels the inclination of the fixing surface 14. As an example of a method of fixing a polishing jig in a progressive-focus lens, when the difference in thickness between the near side and the far side is large, the thickness of the lens is fixed by aligning the polishing jig in the main meridian direction of the lens. The difference can be offset. In addition, in an eyeglass prescription in which an astigmatic surface and a prism are combined, it is necessary to determine the fixed direction in consideration of the angle of the astigmatic axis and the prism direction. Next, the spectacle lens (lens base material) 33 is mounted on the object holding device 212 of the polishing apparatus 2 by mounting the mounting section 11 on the chuck 212C of the polishing apparatus 2. The mounted spectacle lens (lens base material) 33 can be separated from and approached to the elastic body 222 of the polishing tool 22 by the air cylinder 212A, and is further pressed against the elastic body 222 at a predetermined polishing pressure.
The elastic body 222 having a polishing pad adhered to the surface is rotated at a predetermined rotation speed on the turntable 231 while applying tension at a predetermined internal pressure by adjusting the pressure of compressed air. Then, while rotating the spectacle lens (lens base) 33 at a predetermined rotation speed, the spectacle lens (lens base) 33 is pressed against the elastic body 222 with a predetermined polishing pressure of the air cylinder 212 </ b> A. The polishing is performed while the polishing liquid is supplied from the polishing liquid supply unit 24 to the surface of the elastic body 222. Thereby, the polished surface of the lens substrate 33 is finished to a desired surface state.

According to the present invention, the following effects can be obtained.
(1) In the case where the polishing jig 1 of the present invention is not used as in the related art, depending on the spectacle prescription of the spectacle lens, a part is not polished, and the trajectory of the tool used in the apparatus of the shape creation process , A phenomenon in which the tool mark remains, or a part in which the contact with the polishing tool is weak is not finished to a mirror surface and remains whitish. If the spectacle lens is forcibly polished to obtain a mirror surface, the polishing will proceed excessively, causing a shape change called sagging, or a deviation from the eyeglass prescription aimed at the lens power and prism amount. It may be curled. Further, even if a good surface is obtained, the polishing time until the surface is obtained becomes long.
On the other hand, the polishing jig 1 has a fixing portion 13 for fixing the block jig 40 to which the lens substrate 33 is fixed, and a mounting portion 11 for mounting the polishing jig 1 to the chuck 212C of the polishing device 2. The surface 14 that defines the inclination of the fixing portion 13 and the surface 12 that defines the inclination of the mounting portion 11 have a predetermined angle. When the block jig 40 to which the lens substrate 33 is fixed is fixed to the polishing jig 1, if the inclination of the fixing surface 14 of the polishing jig 1 and the surface to be polished of the lens substrate 33 are fixed in directions that cancel each other out, The contact of the polished surface with the polishing tool 22 is improved, the entire polished surface can be polished more uniformly, and the generation of tool marks and whitish unpolished residues can be prevented. In addition, since the polishing can be performed uniformly, it is possible to prevent a change in shape called sagging and a deviation from eyeglass prescription. Further, the time required until the entire polished surface is finished to a desired surface can be reduced.

(2) Since the surface to be polished of the lens substrate 33 and the polishing tool 22 are in natural contact with each other, the lens substrate 33 may come off the polishing apparatus 2 and be damaged, or the polishing tool 22 may be damaged and damaged. The problem of shortening the service life is improved.
(3) Further, the inclination between the mounting surface 12 of the mounting portion 11 of the polishing jig 1 and the fixing surface 14 of the fixing portion 13 is formed in accordance with the prism amount of the spectacle lens, the addition power, and the angle of the astigmatic axis. Since the polished surface corresponds to the inclination of the polished surface of the spectacle lens, the contact of the polished surface with the polishing tool 22 can be more reliably improved, and the entire polished surface can be polished more uniformly.

(4) Since the shape of the mounting portion 11 of the polishing jig 1 is the same as the shape of the block jig 40, the polishing jig 1 according to the present invention can be used without changing the structure of a conventional polishing apparatus body. Can be attached. Therefore, the contact between the lens substrate 33 and the polishing tool 22 can be made substantially uniform using a conventional polishing apparatus body.
For a spectacle lens having a small inclination of the surface to be polished or a spectacle lens having a small difference in thickness, a block jig to which the spectacle lens is fixed is directly mounted on the polishing apparatus 2 without using the polishing jig 1 according to the present invention. Processing can be performed with a common polishing apparatus 2.

It should be noted that the present invention is not limited to the above-described embodiment, but includes modifications and improvements as long as the object of the present invention can be achieved.
For example, in the present invention, the refraction surface formed into a convex surface is any one of a spherical surface, a rotationally symmetric aspheric surface, a multifocal surface, and a free-form surface, and the refraction surface formed into a concave surface is a spherical surface, a rotationally symmetric aspheric surface, a toric. The present invention can be applied to a spectacle lens that is any one of a surface, an aspheric astigmatic surface, and a free-form surface. In addition, the present invention can be applied to a case where both the convex surface and the convex concave surface are formed into the above-mentioned shape.
In the above-described embodiment, the polishing is performed by swinging the spectacle lens (lens base material) 33 by the swing driving device 211. However, the present invention is not limited to this. The polishing may be performed by giving a swing. Also in this case, polishing can be performed in the same manner as when the spectacle lens 33 is swung.

Next, examples of the present invention will be described.
(Example)
The astigmatic power is −4.00 diopter in minus notation, the angle of the astigmatic axis is 90 °, and the lens base material of the inner surface progressive lens which is the spectacle prescription of 4.00 diopter is applied to the polishing jig 1 of the above embodiment. And polished.
The polishing jig 1 was fixed to the polishing apparatus main body 20 in a direction that offsets the inclination of the surface of the lens substrate in the main meridian direction.
In this case, polishing was completed in 9 minutes, and a desired mirror surface was obtained.
(Comparative example)
An inner surface progressive lens having the same spectacle prescription as in the example was polished without using the polishing jig 1.
Even if the polishing was performed for 20 minutes or more, the polishing was not sufficiently performed on the near side in the main meridian direction, and the desired mirror surface was not finished.
As described above, the effect of the present invention that the contact between the polished surface of the lens substrate and the polishing tool can be made substantially uniform and the polishing time can be reduced can be confirmed.

  The present invention can be used for polishing an optical lens, for example, a spectacle lens.

FIG. 1 is a schematic view showing a polishing apparatus according to the present invention. FIG. 2 is a schematic view showing a polishing tool of the polishing apparatus. FIG. 1 is a schematic view showing an example of a polishing jig according to the present invention. 5 is a flowchart showing a manufacturing process of the lens of the present invention. FIG. 4 is a schematic view showing a step of fixing a semi-finished lens and a block jig. FIG. 4 is a schematic diagram showing a process of shaving a concave surface of a semi-finished lens and creating a shape of a lens substrate. FIG. 3 is a schematic diagram showing a lens polishing process using the polishing jig of the present invention. FIG. 4 is a schematic view showing a main part of a modification of the polishing apparatus of the present invention. (A) is a schematic diagram showing a polishing process using a hard polishing tool, (b) is a schematic diagram showing a polishing process using a polishing tool made of an elastic body, c) is a schematic diagram showing a conventional polishing step of polishing a lens having a large inclination of a surface to be polished or a lens having a large difference in lens thickness using a polishing tool made of an elastic body.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 1 ... Polishing jig, 2 ... Polishing device, 11 ... Mounting part, 12 ... Mounting surface, 13 ... Fixed part, 14 ... Fixed surface, 20 ... Polishing device main body, 21 ... Polished object holding part, 22 ... Polishing tool, 23: polishing tool drive unit, 24: polishing liquid supply unit, 212C: chuck, 22: polishing tool, 31: semi-finished lens, 33: lens substrate, 40: block jig, 41: low melting point alloy, 42: chuck , 52: polishing tool, 131: concave portion, 211: swing drive device, 211A: motor, 211B: crank, 211C: connecting rod, 212: holding object to be polished, 212A: air cylinder, 212B: piston rod, 212C ... Chuck, 212D: motor, 212E: rocking shaft, 221: cylindrical portion, 222: elastic body, 231: rotary table, 311: concave surface, 331: concave surface, 331A: strong contact portion 331B ... part is weak per

Claims (4)

The optical lens is fixed to a polishing apparatus main body of a polishing apparatus that presses the elastic body against a surface to be polished of the optical lens and grinds the elastic body while applying tension to the elastic body of the polishing tool having a dome-shaped elastic body with a pressure fluid. Polishing jig for fixing the block jig,
A fixing portion for fixing the block jig, and a mounting portion mounted on a chuck of the polishing apparatus, a surface that defines the inclination of the block jig in the fixing portion, and the inclination is defined by the chuck in the mounting portion. A polishing jig characterized by being formed so as to have a predetermined angle with a surface to be polished. The polishing jig according to claim 1,
The angle between the surface defining the inclination of the block jig in the fixing part and the surface of the mounting part whose inclination is regulated by the chuck is at least one of the prism amount of the optical lens, the addition, and the angle of the astigmatic axis. A polishing jig characterized by being determined based on one. A polishing apparatus for polishing an optical lens,
Tension is given by the pressure fluid, the surface to be polished of the optical lens is pressed, an elastic tool having a dome-shaped elastic body for polishing, and a polishing apparatus main body including a chuck to which the optical lens is attached,
A polishing jig for fixing a block jig to which the optical lens is fixed to the polishing apparatus body,
The polishing apparatus according to claim 1, wherein the polishing jig is the polishing jig according to claim 1. In a polishing method of polishing the elastic body of a polishing tool having a dome-shaped elastic body by applying pressure fluid to the elastic body while pressing the elastic body against a surface to be polished of an optical lens,
The polishing is performed using the polishing apparatus according to claim 3,
A polishing method comprising: fixing an optical lens so that a surface to be polished of the optical lens has a predetermined inclination;

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