JP5112910B2 - Retainer - Google Patents

Description

  The present invention relates to a holder, for example, a technique effective when applied to a holder used when grinding or polishing an optical element such as a lens having a curved surface shape or a planar shape.

  For example, as a lens holder that is implemented by so-called non-blocking single ball processing without fixing a spherical or planar lens used in a camera, a microscope, or the like with an adhesive, etc., the tip of the swing shaft (so-called Kanzashi) is used. A lens holder of a type that is used while being swingably fixed is disclosed in Patent Document 1.

Patent Document 2 and Patent Document 3 disclose a technique in which a receiving member that supports a lens has a two-piece structure in a similar lens holder.
In the conventional lens holder disclosed in Patent Document 1, a lens is supported by a middle piece via a lens receiving sheet material, and an outer cylinder portion that supports the outer diameter of the lens is attached to the middle piece in a replaceable manner. And in the conventional lens holder of this patent document 1, when the edge part of a lens is thin, even if the lens protrusion amount from an outer cylinder part is small, an outer cylinder part can be taken out easily. There is a notch.

  Furthermore, in order to cope with the outer tube portion being worn by rubbing with processing, the outer tube portion is structured to be replaceable with respect to the lens holder. In addition, this lens holder has a structure that is used in a mechanism that presses and holds the lens holder from the back side by means of a Kanzashi used in a general existing polishing machine.

  On the other hand, in Patent Document 2 and Patent Document 3, in a lens holder that is used by being fixed to a holder spindle instead of the existing Kanzashi, the lens has a two-body structure and an elastic material interposed therebetween. A structure is disclosed in which the lens is stably held without causing the lens to roll over against the force generated by the polishing process.

  That is, Patent Document 2 discloses a lens holder, a lower-stage polishing holder that holds a lens on an inner peripheral surface via an O-ring-shaped elastic member, and an O-ring-shaped elastic holder on the back surface of the lower-stage polishing holder. A two-piece structure consisting of an upper polishing holder that is supported via a material and whose back is fixed to a holder spindle, and the entire lens and lens holder are rotatably held by a spindle (rotating shaft) attached to the polishing apparatus. A technique with the above structure is disclosed.

  Further, Patent Document 3 adopts a similar two-body structure including a receiving holder that holds a lens and a pressing holder that supports the back surface of the receiving holder, and the interface between the receiving holder and the pressing holder is a spherical surface. A configuration is disclosed in which a non-spherical elastic body is disposed on this non-spherical surface. Then, the concave spherical surface (not-spherical surface) provided on the holding holder is configured so as to have a dimension obtained by adding the dimension of the radius of curvature of the convex spherical surface of the receiving holder that holds the lens and the thickness of the elastic body. Trying to prevent the lens from tipping over.

  However, the conventional lens holder of Patent Document 1 described above is intended to improve workability by allowing the lens to be easily taken out from the lens holder by a notch provided in the outer cylinder portion. The so-called edge portion (outer edge portion) makes it easy to polish a thin lens.

  In addition, the outer cylinder part that supports the back of the lens is separated from the outer cylinder part so that the outer cylinder part can be easily replaced, but this is also a function for replacing the worn outer cylinder part. It is not a function for facilitating polishing when the edge portion of the lens is thin. Even if the worn outer cylinder part is replaced, it is not possible to prevent the outer cylinder part itself from being worn.

  Further, in the techniques of Patent Document 2 and Patent Document 3 described above, it is intended to prevent the lens from overturning when the lens is polished by configuring the lens holder with a two-body structure. It is not specifically assumed that the edge portion of the substrate is processed while being held thin.

  That is, in any of the lens holders of Patent Document 1, Patent Document 2, and Patent Document 3 described above, if a lens with a thin edge portion is attached to the lens holder and polishing is performed, the edge portion is thin. It is not assumed that the lens falls off or the edge portion is damaged due to a short engagement dimension (hook) with the lens holder.

  That is, in a lens with a thin edge, the contact length between the outer cylinder part and the edge part of the lens disclosed in Patent Document 1 is short, and the lens is easily generated by a slight vibration due to a force generated by a frictional force of polishing or a movement of polishing. There is a concern that the problem of falling off from the lens holder frequently occurs. There is also a concern that the edge is frequently damaged due to relative movement between the edge portion of the lens and a member supporting the edge due to vibration or the like.

However, none of the lens holders of Patent Documents 1 to 3 described above discloses a countermeasure against this phenomenon.
One of the main factors that cause the lens to fall off the lens holder or break the edge part is that the lens and the lens holder are not integrated during polishing, and the lens slides within the holder and moves relative to each other. It is possible that a phenomenon occurs.

During the polishing process, the lens and the lens holder must be frictionally held via an elastic material serving as a receiving material, and both must be integrated to perform a rotational motion and a rocking motion.
However, since the polishing liquid is supplied from the outside during the polishing process to the lens and the lens holder, the abrasive and water come around to contact each other and hold the lens in a wet (wet) atmosphere. For this reason, the frictional force of both the lens and the receiving material becomes so small as to be incomparable with the time of drying due to the presence of water, and they easily slip each other. In this slippery situation, it is difficult to transmit the rotational force generated in the lens by the polishing process to the large and heavy lens holder and the spindle that supports the holder without sliding the lens with respect to the holder. If the heavy rotating mechanism portion remains, the lenses and the lens holder slide with each other.

  For this reason, especially in a lens with a thin edge portion, the fitting dimension (clearance) of the edge portion in the lens and the receiving holder in Patent Document 3 or the lens and the outer cylinder in Patent Document 1 due to the positional change due to relative movement of each other. Occurrence of dropout due to change and wear due to mutual sliding due to relative movement are likely to occur.

  In particular, in the lens holders shown in Patent Document 1, Patent Document 2, and Patent Document 3, a rotation mechanism for rotating the lens holder is provided on the polishing apparatus side that presses the lens holder, and the lens holder is Large and heavy structure. Accordingly, in order to rotate the lens holder, a large frictional force and a rotational torque transmission are required. On the other hand, the lens and the lens holder slide relative to each other, thereby causing relative movement. For this reason, as described above, technical problems such as dropping of the lens and wear of the outer cylinder portion occur.

  Further, as described in Patent Document 1, if the lens with a thin edge portion is held, the outer cylinder portion is worn out more quickly, so that the dimensional difference between the lens and the outer cylinder portion is likely to increase. It will be easy to drop off.

  Further, when the outer diameter of the lens becomes smaller, the rotational force generated by the lens becomes smaller, so that it becomes more difficult to rotate the lens holder integrally with the lens via a rotation mechanism provided in the polishing apparatus. .

In addition, if a relative movement occurs between the lens and the lens holder during polishing, relative to the surface of the lens in contact with the lens holder, that is, the holding surface (optical functional surface) opposite to the surface to be polished of the lens. It may also cause defects such as scratches and bruises caused by exercise.
Japanese Patent Laid-Open No. 11-10503 Japanese Examined Patent Publication No. 6-65460 Japanese Patent No. 3630958

  It is an object of the present invention to easily rotate integrally with an optical element even in a state where a holding force due to friction becomes small due to a fluid intervening between the optical element to be processed in polishing or grinding. Another object of the present invention is to provide a holder that can perform stable polishing and grinding even in an optical element such as a lens having a thin edge or a small-diameter lens.

A first aspect of the present invention is a holder for holding an optical element and rubbing it against a processing tool,
A sheet material in contact with the holding surface on the opposite side to the processing surface in sliding contact with the processing tool of the optical element;
A receiving material that supports the optical element via the sheet material;
An outer diameter ring that supports an outer edge portion of the optical element supported by the receiving material;
An outer cylinder that supports the outer peripheral portion of the outer diameter ring and has a concave spherical surface portion that engages with an external swing shaft on the back side;
A sliding member that is interposed between the outer cylinder and the receiving material and inherits both rotatably;
A holding tool is provided.

A second aspect of the present invention is a holder that rotatably holds an optical element and rubs it against a processing tool,
A sheet material in contact with the holding surface on the opposite side to the processing surface in sliding contact with the processing tool of the optical element;
A receiving material that supports the optical element via the sheet material;
An outer diameter ring that supports an outer edge portion of the optical element held by the receiving material via the sheet material;
An outer cylinder that supports the outer peripheral portion of the outer ring,
A sliding member that is interposed between the outer cylinder and the receiving material and inherits both of them rotatably.
A pressing member that elastically presses the outer cylinder via an elastic member;
A holding tool is provided.

  According to the present invention, in processing such as polishing and grinding, even if the holding force due to friction is reduced due to the presence of fluid between the optical element to be processed, it can be easily rotated integrally with the optical element. Thus, it is possible to provide a holder capable of performing stable polishing and grinding even in an optical element such as a lens having a thin edge or a small-diameter lens.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
First, the outline of each aspect of the present embodiment will be described, and then the embodiment will be illustrated in more detail.

In the first aspect of the present embodiment, a structure of a holder used when polishing is performed by pressing the lens holder of the present invention through a knead of an existing polishing machine is disclosed.
That is, a lens or flat glass optical element and a tool are rubbed against each other, and the optical element is used to be polished in a holder of the optical element that is used when grinding and polishing the optical element by relative movement caused by rotation and swinging of each other. A sheet material that is in contact with the back surface opposite to the polishing surface and holds the optical element, a receiving material that fixes the sheet material and supports the sheet material and the optical element, and an outer diameter that is fixed to the receiving material and supports the outer diameter portion of the optical element An outer cylinder having a concave spherical surface portion that supports the outer diameter ring so as to cover the outer peripheral portion of the ring and the outer diameter ring and that engages with the Kanzashi provided in the polishing apparatus on the half-pair side, and the outer cylinder and the receiver Disclosed is a holder provided with a sliding member that is interposed between materials and inherits both of them in a rotationally movable manner.

The configuration and operation of the first aspect will be described with reference to FIGS. 1A and 1B.
FIG. 1A is an exploded cross-sectional view showing a configuration example of a holder that is a first aspect of an embodiment of the present invention, and FIG. 1B is a cross-sectional view showing an operation state thereof.

  The holder H10 of this aspect includes a bottomed cylindrical outer cylinder 6 having a storage recess 6a, and a receiving material 4 that holds the lens 1 (optical element) via the sheet material 3 and is stored in the storage recess 6a. And an outer ring 5 arranged coaxially with the receiving member 4 so as to support the outer edge portion (edge portion 1a) of the lens 1.

On the back side of the outer cylinder 6, there is provided a concave spherical Kanzashi hole 6 b that engages with a spherical universal joint 9 a at the tip of the Kanzashi 9 on the polishing apparatus side (not shown).
First, the lens 1 to be processed is inserted into the outer ring 5 that is fitted with the diameter of the lens 1 and supported in the radial direction. At this time, the lens 1 is supported in the thickness direction of the lens 1 through the receiving material 4 that fixes the holding surface 2a on the opposite side to the processing surface 2b (spherical surface) to be processed, in contact with the sheet material 3. It is done.

  The outer diameter ring 5 is fixed to the receiving material 4, and the four elements of the sheet material 3, the receiving material 4 and the outer diameter ring 5 that are fixed to each other, and the lens 1 that is inserted and held therein are integrated. . However, the lens 1 is only inserted into the receiving material 4 and the outer diameter ring 5 and is not fixed, but is attached to the inside by fitting to the outer diameter ring 5 and contact by frictional force with the receiving material 4 to the end. Has been.

  Next, the lens 1 integrated with the sheet material 3, the receiving material 4 and the outer diameter ring 5 as described above is inserted into the outer cylinder 6 having an inner diameter larger than the outer diameter of the outer diameter ring 5, and the existing lens (not shown) is omitted. As illustrated in FIG. 1B, a polishing process is performed by pressing against a polishing surface 8 a of a polishing plate 8 (processing tool) through an outer cylinder 6 from a kneading 9 mounted on a grinding machine or a polishing machine.

  At this time, the outer cylinder 6 and the receiving member 4 attached to the outer cylinder 6 are brought into contact with and engaged with each other via a sliding member 7 having a small friction coefficient so as to easily perform a relative rotational movement. The sheet material 3 that is in contact with the holding surface 2a of the lens 1 and interposed between the receiving material 4 that supports the lens 1 does not slip relative to the lens 1 when the lens 1 is polished. Since it needs to be held, the material has a large friction coefficient.

  That is, the lens 1 and the sheet material 3 do not generate relative movement during the polishing process, and a relative slip occurs between the slide member 7 (receiving material 4) and the outer cylinder 6. It is made of a material having a smaller friction coefficient than the sheet material 3 fixed to the receiving material 4. Since the friction coefficient of the sliding member 7 is smaller than the friction coefficient of the sheet material 3, the receiving material 4 and the outer cylinder 6 are easy to slip, and the lens 1 and the sheet material 3 can be held without slipping. Of course, the sheet material 3 may be an existing material, and there is no problem if a sliding member 7 having a smaller friction coefficient that is easier to slide than the sheet material 3 is selected.

  As a result, no relative idling motion (sliding displacement) occurs between the lens 1 and the sheet material 3, and the lens 1 does not rub against the sheet material 3, so that the sheet material 3 is worn away or the holding surface 2a of the lens 1 (optical function). Occurrence of scratches on the surface) can be prevented.

  In addition, an outer diameter ring 5 that supports the outer diameter of the lens 1 is fixed to the receiving material 4 that fixes the sheet material 3 that supports the lens 1, and the outer diameter ring 5 is connected to the receiving material 4 via a sliding member 7. Thus, it rotates with respect to the outer cylinder 6.

  That is, since the outer ring 5 fixed to the receiving member 4 that does not rotate relative to the lens 1 also does not move relative to the lens 1, it is worn away by rubbing against the edge 1 a due to the rotation of the lens 1. There is nothing to do.

  Therefore, unlike the prior art described above, the outer diameter ring 5 is not worn due to the polishing of the lens 1, so that the work of replacing the outer diameter ring 5 can be omitted each time. Since there is no relative movement between the outer ring 5 and the lens 1, it is possible to prevent the edge 1 a of the lens 1 from being damaged in addition to wear due to rubbing between them, and to prevent the outer ring 5 and the lens 1 from being damaged. Since the engaged state is maintained and maintained, it is possible to prevent the lens 1 from dropping from the outer diameter ring 5 due to the rotational movement even with the lens 1 having the thin edge portion 1a.

  Further, by adopting a structure that actively slides by reducing the frictional force between the sliding member 7 and the receiving member 4, for example, even with a small-diameter lens 1 that is difficult to transmit the rotational force from the polishing dish 8, The lens 1 can be easily rotated while preventing the scratch on the holding surface 2a of the lens 1.

  Since the rotation of the lens 1 in the holder H10 is also a sliding friction due to surface contact depending on the friction coefficient of the sheet material 3, unlike rolling friction accompanying point contact such as a ball bearing (bearing), The holding portion of the lens 1 in the holder H10 can exhibit high rigidity even with respect to force fluctuations due to pressure and processing force. For this reason, the vibration of the lens 1 and the holder H10 accompanying the rotational motion is also suppressed, and higher polishing accuracy can be obtained on the work surface 2b of the lens 1.

  Moreover, in the holder H20 illustrated in FIG. 1A and FIG. 1B described above, the structure in which the sliding member 7 is fixed to the outer cylinder 6 and the sliding member 7 and the receiving material 4 are in contact and slid is illustrated. Even if the sliding member 7 is fixed to the receiving member 4 and the sliding member 7 and the outer cylinder 6 slide relative to each other and perform relative movement, the same effect can be obtained.

  Further, the sliding member 7 and the receiving member 4 or the sliding member 7 and the outer member are not attached to any member, but are simply sandwiched between the outer cylinder 6 and the receiving member 4 in the form of a sheet. Since it slides between either of the cylinders 6 or both, the sliding member 7 may be used without being fixed.

  Further, the only members that rotate together with the lens 1 are the sheet material 3, the receiving material 4, and the outer diameter ring 5, so that the rotational force is transmitted from the outer cylinder 6 side to the receiving material 4 and the like. Thus, the rigidity of the outer cylinder 6 and the like can be reduced, and it is easy to make all the components of the holder H10 lightweight, and the starting torque during rotation is small, and the lens 1 is slid with respect to the holder H10 (idle rotation). It can be held without

Next, the second aspect of the present embodiment will be described.
In this second aspect, instead of the Kanzashi structure that presses the lens holder while supporting the lens in a tiltable manner, a structure that uses a holding means that presses the lens holder in a tiltable manner depending on the deformation of the elastic material is used. Disclose.

  That is, the optical element is rotatably held, the rotation axis thereof is arranged so as to pass through the sphere center of the tool plate, and the tool plate is rotated and swung while being pressed in the same direction as the rotation axis. In a holder of an optical element processing apparatus that grinds or polishes an element, a sheet material that holds the optical element in contact with a back surface opposite to the surface to be polished for polishing the optical element, and a sheet material that is fixed to the sheet material A receiving member that supports the optical element; an outer diameter ring that is fixed to the receiving member and supports the outer diameter portion of the optical element; an outer cylinder that supports the outer diameter ring so as to cover the outer periphery of the outer diameter ring; A holding member comprising a sliding member that is interposed between a cylinder and a receiving material and inherits both of them rotatably, an elastic material that elastically presses the outer cylinder, and a pressing member that is attached to the polishing machine and presses the elastic material Is disclosed.

The configuration and operation of the second aspect will be described with reference to FIGS. 2A and 2B.
FIG. 2A is an exploded cross-sectional view illustrating a configuration example of a holder that is a second aspect of the embodiment of the present invention, and FIG. 2B is a cross-sectional view illustrating an operation state thereof.

The operation will be described with reference to FIGS. 2A and 2B, but the same members as those in FIGS. 1A and 1B described above are denoted by the same reference numerals and description thereof is omitted.
In the holder H20 of the second aspect, when the polishing machine presses and holds the lens holder, in the first aspect described above, it is pressed by the kanzashi 9 engaged through a sphere so as to be rotatable and tiltable. The difference is that a pressing method for obtaining a free inclination of H20 by deformation of the elastic member 10 is employed.

  Specifically, the sheet material 3 that supports the lens 1, the receiving material 4, and the outer diameter ring 5 are the same as the holder H <b> 10 of the first aspect described above, but in order to support the outer diameter ring 5, The point which is the mechanism in which the outer cylinder 16 arrange | positioned so that it covers may be pressed via the elastic material 10 differs from a 1st aspect.

  As for the sheet material 3, the receiving material 4, the outer diameter ring 5, the outer cylinder 16, and the sliding member 7, the sliding member 7 provided in the housing recess 16 a of the outer cylinder 16 is externally attached as in FIGS. 1A and 1B described above. The cylinder 16 and the receiving member 4 (lens 1) are configured to slide and rotate with respect to each other.

  Here, the outer cylinder 16 of the holder H20 is pressed by a spindle 11 rotatably attached to a polishing machine (not shown) via an elastic member 10 disposed on the back surface 16b, and the lens 1 and the polishing dish 8 are moved. Slide to polish.

  The processing surface 2b of the lens 1 is pressed against the polishing surface 8a of the polishing plate 8, and grinding or polishing is performed by rotation and swinging motion. At this time, the spindle 11 that presses the lens 1 passes through the elastic material 10. By pressing the lens, the lens 1 being ground and polished can be pressed in a tiltable manner for processing.

  Therefore, grinding or polishing can be performed while pressing the lens 1 without causing relative movement between the lens 1, the sheet material 3, and the outer ring 5. As a result, the holder H20 can stably hold the lens 1 having the thin edge portion 1a without falling off the outer diameter ring 5, wear of the sheet material 3 or the outer diameter ring 5, and the holding surface 2a (optical) of the lens 1. It is possible to prevent scratches on the functional aspect).

  The sliding member 7 disposed between the outer cylinder 16 and the receiving material 4 is intended to slide the sheet material 3 holding the lens 1 and the receiving material 4 and the outer diameter ring 5 against the rotational movement by polishing. Therefore, by arranging the flat sliding member 7 with the interface between the outer cylinder 16 and the receiving member 4 being a planar shape, the sliding member 7 can be of the same simple planar shape even for various lens 1 shapes. It can cope and becomes versatile. The lens 1 can be arranged in a plane regardless of the shape of the lens 1, and the member such as the outer cylinder 16 and the receiving material 4 of the holder H 20 can be easily manufactured and the sliding member 7 can be easily installed.

  On the other hand, in the third aspect of the present embodiment, in the holder H20 in the second aspect described above, the elastic material that presses the lens in a tiltable manner has a spherical shape for generating a tilt that presses the lens against the tool. A structure for pressing is disclosed.

That is, in the holder disclosed in the second aspect, the outer cylinder supporting the outer ring has a convex spherical surface so as to cover the outer peripheral part of the outer ring, and the spherical center of the convex spherical part is the optical element. The structure formed by the intersection of the tangent line which contacts the surface to be polished and the rotation axis of the optical element is disclosed.
(Function)
In the third aspect, in the holder according to the second aspect described above, the elastic material that presses the lens in a tiltable manner presses through a spherical shape for generating a tilt that presses the lens against the tool.

  Specifically, in the outer cylinder that covers and presses the lens and the receiving material that supports the lens and the outer diameter ring via a sliding member, the portion that contacts the elastic material that presses the outer cylinder has a convex spherical shape. At this time, the elastic material that presses the outer cylinder is interposed to absorb a change in position when the lens is tilted by a processing force during grinding or polishing.

  When an elastic material absorbs a change in position, not only an arbitrary change in position is generated by deformation of the elastic material, but also a change in position is generated along the spherical surface of the outer cylinder by forming a spherical shape on the outer cylinder. Is intended. At this time, the spherical surface is formed as a convex spherical surface, and the spherical center is configured to be an intersection of a tangent line passing through the outer peripheral edge of the optical element and contacting the surface to be polished and the rotation axis of the optical element.

That is, the lens is positioned on the tool side with respect to the processing surface of the lens, and the position change due to the inclination of the elastic material occurs around the spherical center of the convex spherical surface on the back surface of the outer cylinder.
Here, the reason why the convex spherical center of the back surface of the outer cylinder is arranged at the above-mentioned position is the position found from the experience of lens polishing, and can most effectively support the processing force generated by polishing. It is.

  For example, assuming that the surface to be polished has a planar shape, when polishing the planar shape, in order to effectively support the object to be polished against the polishing force, the surface to be polished must be supported on a plane that matches the surface to be polished. Is preferred. This is an important position for obtaining a good planar shape without generating a moment to rotate the workpiece by the force generated on the workpiece surface.

  Similarly, in the spherical shape, there is an effective position to be supported against the machining force generated on the entire spherical surface. However, this indicates that the position of the above-mentioned spherical center is optimal. In particular, at the outer peripheral end of the lens where a large force is generated, it is most effective to arrange the spherical center at the intersection of the tangent line passing through the outer peripheral end and the rotation axis of the lens. It is preferable to arrange a convex spherical center.

In the fourth aspect of the present embodiment, a structure is disclosed in which the shape of the sliding member shown in the first to third aspects is a planar shape.
(Function)
As shown in FIG. 1A, FIG. 1B, FIG. 2A, and FIG. 2B described above, the sliding member 7 is composed of the sheet material 3, the support material 4, the outer diameter ring 5, and the outer cylinder 6 (outer cylinder 16) that support the lens 1. Intervene at the interface. As described above, the role of the sliding member 7 is to prevent the holding surface 2a of the lens 1 and the sheet material 3 from slipping by sliding with the sliding member 7 in the polishing process by the relative movement of the polishing dish 8 and the lens 1. ing. For this reason, the friction coefficient of the sliding member 7 is configured to be smaller than that of the sheet material 3.

  Here, since it is important that the sliding member 7 has a structure and structure that is easier to slide than the other parts, there is a problem in a structure in which the mutual contact area and the contact state are changed by a complicated shape. For this purpose, a planar shape that can be easily configured by approximating the shapes of the receiving member 4 and the outer cylinder 6 is most preferable. If it is a planar shape, the shape of both members can be created easily, and since the mutual mutual contact (contact state) can be obtained stably, it is easy to configure with the sliding member 7 interposed therebetween. Become.

  Of course, even if the shape is other than the planar shape, the planar shape is most suitable as long as the receiving member 4 and the outer cylinder 6 can obtain a stable contact state via the sliding member 7, but this is not limited. In particular, even if there is an error in the shape of each other, if both the receiving material 4 and the outer cylinder 6 are planar, it is easy to adjust the shape by rubbing them together, and to ensure a stable contact state of the planar shape. Is the most suitable.

  When the contact state changes, the pressure distribution between the outer cylinder 6 and the receiving member 4 changes, and the change in the pressure distribution changes with the frictional force of each other. The planar shape that can be optimal is optimal.

Next, embodiments of the present invention will be described based on the above-described aspects.
(Embodiment 1)
FIG. 3 is a cross-sectional view showing an example of the configuration and operation of the holder according to the embodiment of the present invention. The holder H11 disclosed in the first embodiment is a more embodied version of the holder H10 illustrated in FIGS. 1A and 1B described above, and common elements are given the same reference numerals and overlapped. Will be omitted.

FIG. 3 shows a state in which the lens 1 such as a convex meniscus lens is being polished by using the holder H11 of the present embodiment through a khan 9 used in an existing polishing machine.
(Constitution)
A sheet material 3 made of polyurethane, which is a superelastic material having a large friction coefficient, is fixed to the receiving material 4 so as to be in contact with the holding surface 2 a of the lens 1. Since the receiving material 4 supports the holding surface 2 a of the lens 1, the holding surface 2 a has a shape in which the concaves and convexes are inverted. The shape of the receiving material 4 is a sheet material with a radius of curvature of the holding surface 2 a of the lens 1. The radius of curvature is increased or decreased by the thickness of 3.

  For example, in FIG. 3, since the holding surface 2a of the lens 1 is a concave spherical surface, the receiving material 4 is an inverted convex spherical surface, and the curvature radius of the spherical surface is obtained by subtracting the thickness of the sheet material 3 from the curvature radius of the holding surface 2a. Dimensions. The surface opposite to the spherical surface of the receiving material 4 is formed in a planar shape, and a sliding member 7 having a small friction coefficient, such as polyacetal, which is an acetal resin, or Teflon (a registered trademark of DuPont), is attached to the plane. ing.

An annular outer diameter ring 5 is attached to the outer peripheral portion of the receiving member 4 by inserting and supporting an edge portion that is an outer diameter portion of the lens 1.
Further, the outer cylinder 6 that supports the outer diameter of the outer ring 5 is arranged so that the outer recess 5 a covers the outer ring 5 and the receiving member 4 via the sliding member 7. In the center of the back surface of the outer cylinder 6, there is a Kanzashi hole 6 b that is a concave spherical surface for engaging with a universal joint portion 9 a of a Kanzashi 9 provided in a polishing apparatus (not shown).

  In the holder H11, as illustrated in FIG. 3, the back surface of the outer cylinder 6 is provided with a concave step portion 6c concentrically with the Kanzashi hole 6b. The central portion of the concave step portion 6c is The arrangement part of the Kanzashi hole 6b protrudes.

  Corresponding to the shape of the outer cylinder 6, on the back side of the receiving member 4, the concave stepped portion 4 a having a depth corresponding to the concave stepped portion 6 c of the outer cylinder 6 and the protruding height of the portion of the Kanzashi hole 6 b are provided. A cane portion relief hole 4b having a depth corresponding to the height is provided concentrically.

And the flat sliding member 7 is arrange | positioned between the flat bottom face of the concave step part 4a of the receiving material 4, and the flat bottom face of the concave step part 6c of the outer cylinder 6. FIG.
Thereby, the concave surface side of the convex meniscus lens (in this case, the holding surface 2a of the lens 1) and the support point of the holder H11 by the universal joint portion 9a of the Kanzashi 9 are close to each other, and the lens 1 that is a convex meniscus lens. Is stably held by the holder H11.
(Function)
The lens 1 that performs grinding or polishing is inserted into the outer diameter ring 5 that is fitted with the diameter of the lens 1 and supported in the radial direction. At this time, the lens 1 is supported in the thickness direction of the lens 1 via the receiving material 4 that fixes the sheet material 3 on the holding surface 2a opposite to the processed spherical surface (the processed surface 2b). The outer diameter ring 5 is fixed to the receiving material 4, and the four members of the sheet material 3, the receiving material 4 and the outer diameter ring 5 fixed to each other and the lens 1 inserted therein are integrated. However, the lens 1 is only inserted and not fixed, and is attached to the inside thereof by fitting to the outer diameter ring 5 and contact by frictional force between the receiving member 4.

  Next, the lens 1 integrated with the sheet material 3, the receiving material 4 and the outer diameter ring 5 as described above is inserted into the housing recess 6 a of the outer cylinder 6 having an inner diameter larger than the outer diameter of the outer diameter ring 5. The universal joint portion 9a of the kanzashi 9 attached to the omitted existing grinder or polishing machine is fitted into the kanzashi hole 6b to press the outer cylinder 6 for processing.

  At this time, the outer cylinder 6 and the receiving member 4 attached to the outer cylinder 6 are provided with a sliding member 7 made of Teflon (registered trademark of DuPont) or a polyacetal resin having a small friction coefficient so that relative rotational movement can be easily performed. Through and is engaged.

  The sheet material 3 that is in contact with the holding surface 2a of the lens 1 and interposed between the receiving material 4 that supports the lens 1 needs to be held so as not to slip relative to the lens 1 when the lens 1 is polished. Therefore, it has become a material with a large coefficient of friction such as polyurethane resin.

  That is, the lens 1 and the sheet material 3 do not generate relative movement during the polishing process, so that relative sliding occurs between the sliding member 7 provided on the back surface of the receiving material 4 and the outer cylinder 6. The member 7 is made of a material having a smaller coefficient of friction than the sheet material 3 fixed to the receiving material 4.

  Since the friction coefficient of the sliding member 7 is smaller than the friction coefficient of the sheet material 3, the receiving material 4 and the outer cylinder 6 are easy to slip, and the lens 1 and the sheet material 3 can be held without slipping. Of course, the sheet material 3 may be a material other than polyurethane, and there is no problem if a sliding member 7 having a smaller friction coefficient that is more slippery than the sheet material 3 is selected. However, since water accompanying the polishing liquid is actually present at the interface during the polishing process, a smaller friction coefficient is preferable for the sliding member 7. Therefore, a fluororesin, particularly Teflon (registered trademark of DuPont) is most effective. is there.

  As a result, relative movement between the lens 1 and the sheet material 3 does not occur, and the lens 1 does not rub against the sheet material 3, so that abrasion of the sheet material 3 and generation of scratches on the holding surface 2 a of the lens 1 can be prevented. .

  Further, in the case of the present embodiment, an outer diameter ring 5 that supports the outer diameter of the lens 1 is fixed to the receiving material 4 that fixes the sheet material 3 that supports the lens 1. It rotates together with the receiving member 4 via the sliding member 7.

  That is, the outer ring 5 fixed to the receiving member 4 that does not rotate relative to the lens 1 also does not move relative to the lens 1 and therefore does not wear out due to rubbing due to the rotation of the lens 1.

Accordingly, the outer ring 5 is not worn due to the polishing of the lens 1 as in the prior art, so that the troublesome work of replacing the outer ring 5 every time the outer ring 5 is worn may be omitted. it can.
Since there is no relative movement between the outer ring 5 and the lens 1, it is possible to prevent damage to the edge 1a of the lens 1 in addition to wear due to the friction between the two, and the outer ring 5 and the lens 1 are engaged. By maintaining this state, the lens 1 is stably held by the holder H11. Therefore, even if the lens 1 has a thin edge portion 1a, the lens 1 is dropped from the outer diameter ring 5 due to the rotational movement. Can be prevented.

  Further, by adopting a structure that actively slides between the sliding member 7 and the receiving member 4, for example, even if the lens 1 has a small diameter that is difficult to transmit the rotational force from the polishing dish 8, the holding surface 2 a of the lens 1. It is possible to easily rotate the lens 1 while preventing scratches.

  Regarding the rotation of the holder H11, since it is a sliding friction due to surface contact depending on the coefficient of friction of the sheet material 3 with respect to the lens 1, it differs from rolling friction accompanying point contact such as a ball bearing (bearing). Also, high rigidity can be exhibited against fluctuations in force due to pressure and processing force in polishing. For this reason, the vibration of the holder H11 accompanying the rotational movement is also suppressed, and higher polishing accuracy can be obtained on the work surface 2b of the lens 1 held by the holder H11.

  3 shows a structure in which the sliding member 7 is fixed to the outer cylinder 6 and the sliding member 7 and the receiving material 4 come into contact with each other and slides. However, the sliding member 7 is fixed to the receiving material 4 and the sliding member is reversed. The same effect can also be obtained by adopting a configuration in which the outer cylinder 6 and the outer cylinder 6 slide relative to each other for relative movement.

  Further, the sliding member 7 and the receiving member 4 are not fixed to any member of the receiving member 4 and the outer tube 6 but are simply interposed between the outer tube 6 and the receiving member 4 in the form of a sheet. Alternatively, the sliding member 7 and the outer cylinder 6 may be slid between or both of them, so that the sliding member 7 may be used without being fixed.

Further, since only the sheet material 3, the receiving material 4, and the outer diameter ring 5 are to be rotated integrally with the lens 1, it becomes easy to configure all of them with a light weight, and the starting torque during rotation is small. Can be held without sliding with respect to the holder H11.
(Effect of Embodiment 1)
According to the present embodiment, even with the lens 1 having a thin edge 1a, the lens 1 does not fall out of the holder H11 or break the holder H11 while using the existing Kanzashi 9. The lens 1 can be ground and polished, and even the small-diameter lens 1 can be ground and polished while ensuring a stable rotational motion.

  In other words, even in a state where the holding force due to friction is reduced due to the presence of a fluid between an optical element such as a lens to be processed in a process such as polishing or grinding, it is easily rotated integrally with the optical element. In addition, it is possible to provide a holder H11 capable of performing stable polishing and grinding even in an optical element such as a lens having a thin edge or a small-diameter lens.

(Embodiment 2)
FIG. 4 is a cross-sectional view showing an example of the configuration and operation of a holder according to another embodiment of the present invention.

  The configuration of the holder H21 illustrated in FIG. 4 is a more embodied version of the configuration of the holder H20 illustrated in FIGS. 2A and 2B, corresponding to the lens 1 that is a convex meniscus lens, for example. It is.

  That is, FIG. 4 shows the present embodiment in the holding means for pressing the lens holder in a tiltable manner depending on the deformation of the elastic material, instead of the Kanzashi structure that presses the lens holder while supporting the lens 1 in a tiltable manner. A state where the holder H21 of the form is mounted and the convex meniscus lens is ground or polished is shown.

Components having the same mechanism and function as the holder H20 illustrated in FIGS. 2A and 2B described above are denoted by the same reference numerals and description thereof is omitted.
In the holder H21 of the present embodiment, the receiving material 4 and the lens 1 inserted into the outer diameter ring 5 attached to the receiving material 4 via the sheet material 3 are accommodated inside the accommodating recess 16a, and the outer With respect to the outer cylinder 16 that supports the outer diameter ring 5 so as to cover the outer periphery of the diameter ring 5, a spherical receiving surface 13 is provided on the back surface 16b of the housing recess 16a.

  The spherical receiving surface 13 of the outer cylinder 16 is in contact with, for example, an O-ring-shaped elastic material 10 attached to the pressing material 12 formed on the cup. A pressing member 12 fitted with an elastic member 10 is rotatably attached to a spindle 11 which is a rotating shaft of a polishing apparatus (not shown) via a screw 14.

  In addition, a ring-shaped concave groove 16 c having a diameter corresponding to the outer ring 5 is formed concentrically with the outer cylinder 16 in the peripheral portion of the housing recess 16 a of the outer cylinder 16. The rear side of the diameter ring 5 is fitted.

As a result, for example, the size and weight of the holder H21 in the thickness direction can be reduced while ensuring the rigidity of the receiving member 4, the outer diameter ring 5, and the outer cylinder 16, thereby realizing a reduction in size and weight.
(Function)
Hereinafter, the operation of the holder H21 will be described with reference to FIG. 4, but the members having the same mechanism and function as those of FIGS. 2A and 2B described above are denoted by the same reference numerals and description thereof is omitted.

  Also in the holder H21 of the present embodiment, the lens 1, the sheet material 3, the receiving material 4, and the outer diameter ring 5 that support the lens 1 are integrated as if they were one lens, The sliding member 7 is configured to be rotatable.

  A lens 1 for grinding or polishing is inserted into the outer diameter ring 5, and in this state, the lens 1 is pressed against the polishing dish 8 by a load from the spindle 11 of a polishing machine (not shown), and the polishing dish 8 rotates and swings. The lens 1 is ground or polished by movement.

  At this time, the lens 1 is supported by the receiving member 4 via the sheet material 3 that is in contact with the holding surface 2 a against the load from the spindle 11 by supporting the edge portion 1 a in the radial direction by being inserted into the outer diameter ring 5. It is done.

Further, the receiving member 4 is pressed by the outer cylinder 16 via the sliding member 7 on the side opposite to the surface receiving the lens 1 (the flat bottom surface of the housing recess 16a).
The outer cylinder 16 is subjected to a processing load by a pressing member 12 screwed to the spindle 11 through an elastic member 10 such as an O-ring.

  Here, in the case of the holder H21 of the present embodiment, the storage recess 16a of the outer cylinder 16 that presses the lens 1, the sheet material 3 that rotates integrally with the lens 1, the receiving material 4, and the outer ring 5 is elastic. A portion pressed by the material 10 presents a spherical spherical receiving surface 13.

  In particular, when processing the convex spherical surface (the processed surface 2b of the lens 1) of the convex meniscus lens shown in FIG. 4, the spherical receiving surface 13 to be pressed becomes a convex spherical surface. In the convex surface of the spherical receiving surface 13, the sphere center O <b> 13 that is the center of the sphere is on the lower side in FIG. 4, that is, on the polishing plate 8 side.

  Specifically, the arrangement has the spherical center O13 at the intersection of the line segment B determined by the line segment A shown in FIG. 4 and the rotation axis C of the holder H21 (lens 1). Here, the line segment A is a line segment that connects the spherical center O1 of the processing surface 2b of the lens 1 and the outermost peripheral point of the processing surface 2b of the lens 1, and the line segment B is the lens 1 through which the line segment A passes. This is a normal to line segment A.

  The spherical center O13 of the spherical receiving surface 13 is formed at a substantially intersection of the line segment B and the center axis of the lens 1 (the rotation axis C of the holder H21), so that it is strong against the lens 1 during grinding or polishing. Even if a processing force is applied, the lens 1 is inclined between the outer cylinder 16 and the elastic material 10, that is, along the spherical receiving surface 13.

  The lens 1 and the sheet material 3, the receiving material 4, the outer diameter ring 5, and the outer cylinder 16 are inclined with respect to the elastic material 10 around the spherical center O <b> 13 of the spherical receiving surface 13. The behavior is such that it is pressed against the polishing surface 8a of the polishing plate 8.

  As a result, even when the edge portion 1a of the lens 1 is thin, in addition to preventing the sliding member 7 from falling off by the integrated rotary motion, the behavior of pressing the edge portion 1a against the polishing surface 8a of the polishing dish 8 is achieved. By adding, it is possible to further prevent the lens 1 from dropping from the outer diameter ring 5.

  In addition, disposing the spherical center O13 of the spherical receiving surface 13 at the approximate intersection of the line segment B and the central axis of the lens 1 (the rotation axis C of the holder H21) occurs on the work surface 2b of the lens 1. It has been empirically understood that the vibration during machining and the fluctuation of the machining force can be suppressed most with respect to the machining force, and it is most effective to arrange the spherical center O13 of the spherical receiving surface 13 at this position.

  Moreover, although the effectiveness with respect to the thin lens 1 of the edge part 1a was shown, it is clear that the same effect can be acquired even if the edge part 1a is a lens 1 having a shape that is not thin. The shape of the lens 1 is not limited.

  Similarly, in the case of the small-diameter lens 1, the structure via the sliding member 7 of the present embodiment is effective for the rotational movement of the lens during processing. However, the lens 1 is not limited to a small diameter but has a large diameter. However, it is clear that the same effect can be obtained, and the size of the lens 1 to be used is not limited.

(Effect of Embodiment 2)
According to the holder H21 of the present embodiment, even when the lens 1 is pressed and held by the elastic material 10, the lens 1 with the thin edge portion 1a is dropped from the holder H21, or the holder H21. The lens 1 can be stably ground and polished without damaging the lens 1, and even the small-diameter lens 1 can be ground and polished while ensuring a stable rotational motion.

  That is, as one of the main factors that cause the lens to fall off the holder or break the edge portion, the lens and the holder are not integrated during the polishing process, and the lens slides within the holder to make a relative rotational movement. It is possible that a phenomenon occurs. In each of the embodiments described above, by preventing this relative rotational movement, even a lens with a thin edge can be easily ground and polished by a holder.

  As described above, according to each embodiment of the present invention, the lens 1 with a thin edge 1a or a small-diameter lens 1 is prevented from falling off, damaging the edge 1a, or reducing accuracy. By the stable rotational motion, it is possible to realize high polishing accuracy on the processing surface 2b of the lens 1 and prevention of scratches on the holding surface 2a of the lens 1.

  In particular, the holder of each embodiment of the present invention stabilizes the lens during grinding or polishing processing for a lens having a small thickness, a lens having a small outer diameter, or a lens that requires high surface accuracy on the polishing surface. Can be held.

Needless to say, the present invention is not limited to the configuration exemplified in the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.
(Appendix 1) An optical element is polished in a holder for an optical element used when a lens or a flat glass optical element and a tool are rubbed with each other and the optical element is ground and polished by relative movement caused by rotation and oscillation of each other. A sheet material that holds the optical element in contact with the back surface opposite to the surface to be polished, a receiving material that fixes the sheet material to support the sheet material and the optical element, and supports the outer diameter portion of the optical element that is fixed to the receiving material. An outer cylinder that has an outer diameter ring, a concave spherical surface portion that supports the outer diameter ring so as to cover the outer peripheral portion of the outer diameter ring, and engages with a Kanzashi provided in the polishing apparatus on the half-pair side, and an outer cylinder A holder for an optical element, comprising a sliding member that is interposed between the receiving member and the receiving member so as to allow both to rotate.

  (Supplementary Note 2) The optical element is rotatably held, the rotation axis thereof is arranged so as to pass through the sphere center of the tool dish, and the tool dish is rotated and swung while being pressurized in the same direction as the rotation axis. In the holder of the optical element processing apparatus that grinds or polishes the optical element, the sheet material that holds the optical element in contact with the back surface opposite to the surface to be polished for polishing the optical element, A receiving material that supports the optical element via the outer ring, an outer diameter ring that is fixed to the receiving material and supports the outer diameter portion of the optical element, and an outer cylinder that supports the outer diameter ring so as to cover the outer peripheral portion of the outer diameter ring, A sliding member that is interposed between the outer cylinder and the receiving material and inherits both of them rotatably; an elastic material that elastically presses the outer cylinder; and a pressing member that is attached to the polishing machine and presses the elastic material. An optical element holder.

  (Supplementary Note 3) In the holder described in Supplementary Note 2, the outer cylinder that supports the outer diameter ring has a convex spherical portion so as to cover the outer peripheral portion of the outer diameter ring, and the spherical center of the convex spherical portion is the optical element 3. The optical element holder according to appendix 2, wherein the optical element holder is formed at an intersection of a tangent line passing through the outer peripheral edge and in contact with the surface to be polished, and a rotation axis of the optical element.

  (Supplementary note 4) The holder for an optical element according to Supplementary notes 1, 2, and 3, wherein the sliding member is formed in a planar shape between the outer tube and the receiving member.

It is an exploded sectional view showing an example of composition of a holder which is the 1st mode of an embodiment of the invention. It is sectional drawing which shows the operation state. It is a disassembled sectional view which shows the structural example of the holder which is the 2nd aspect of embodiment of this invention. It is sectional drawing which shows the operation state. It is sectional drawing which shows an example of a structure and effect | action of a holder which is one embodiment of this invention. It is sectional drawing which shows an example of a structure and effect | action of the holder which are other embodiments of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lens 1a Edge part 2a Holding surface 2b Processed surface 3 Sheet material 4 Receiving material 4a Concave step part 4b Kanzashi part relief hole 5 Outer diameter ring 6 Outer cylinder 6a Housing recessed part 6b Kanzashi hole 6c Concave step part 7 Sliding member 8 Polishing dish 8a Polishing surface 9 Kanzashi 9a Universal joint portion 10 Elastic material 11 Spindle 12 Press material 13 Spherical receiving surface 14 Screw 16 Outer cylinder 16a Recess 16b Back surface 16c Ring-shaped grooves H10, H11 Holders H20, H21 Holder C Rotation axis O1 of holder H21 Ball center O13 of lens 1 Ball center of spherical receiving surface 13 of outer cylinder 16

Claims (4)

A holder for holding an optical element and rubbing it against a processing tool,
A sheet material in contact with the holding surface on the opposite side to the processing surface in sliding contact with the processing tool of the optical element;
A receiving material that supports the optical element via the sheet material;
An outer diameter ring that supports an outer edge portion of the optical element supported by the receiving material;
An outer cylinder that supports the outer peripheral portion of the outer diameter ring and has a concave spherical surface portion that engages with an external swing shaft on the back side;
A sliding member that is interposed between the outer cylinder and the receiving material and inherits both rotatably;
A holder characterized by comprising. A holder that holds an optical element rotatably and rubs it against a processing tool,
A sheet material in contact with the holding surface on the opposite side to the processing surface in sliding contact with the processing tool of the optical element;
A receiving material that supports the optical element via the sheet material;
An outer diameter ring that supports an outer edge portion of the optical element held by the receiving material via the sheet material;
An outer cylinder that supports the outer peripheral portion of the outer ring,
A sliding member that is interposed between the outer cylinder and the receiving material and inherits both of them rotatably.
A pressing member that elastically presses the outer cylinder via an elastic member;
A holder characterized by comprising. The holder according to claim 2,
The rotation axis of the holder is arranged so as to pass substantially through the spherical center of the processing tool,
The outer cylinder has a convex spherical surface portion that is in contact with the elastic member, and the spherical center of the convex spherical portion passes through the outer peripheral end of the optical element and intersects with the surface to be processed and the rotation axis of the optical element. A holding tool characterized by conforming to the above. The holder according to any one of claims 1 to 3,
The said sliding member is interposed in the flat interface between the said outer cylinder and the said receiving material, The holder characterized by the above-mentioned.