JP5078881B2 - Lens processing apparatus and lens processing method - Google Patents

Description

  The present invention relates to a lens processing apparatus and a lens processing method for processing both lens surfaces of a lens simultaneously.

  As a lens processing apparatus that simultaneously processes both lens surfaces of a lens as a workpiece, a lens grinding apparatus described in Patent Document 1 has been proposed. Further, in order to process both lens surfaces of the lens at the same time, it is necessary to grip the outer peripheral end surface of the lens so that both lens surfaces of the lens do not interfere with the processing apparatus.

In the lens grinding apparatus described in Patent Document 1, the outer peripheral end surface of the lens is directly gripped by a roller and a driving roller attached to the tip of the air cylinder. At the time of grinding the lens, the lens is rotated by driving a driving roller.
JP-A-8-132341 (page 3, FIG. 3)

  However, in the lens grinding apparatus described in Patent Document 1, since the outer peripheral end surface of the lens is directly gripped by the roller and the driving roller attached to the air cylinder, the lens is used when the outer peripheral end surface is not a perfect circle. The rotation center moves at the time of rotation, and the rotation accuracy becomes insufficient, which causes a problem in machining accuracy. In particular, when grinding an asymmetric lens such as an aspherical lens or a progressive multifocal lens in which at least one of the lens surfaces is aspherical, if the rotational accuracy of the lens is insufficient as described above, a high accuracy There is a possibility that lens processing cannot be realized.

  Further, in the above-described lens grinding apparatus, the outer peripheral end surface of the lens is directly gripped by a plurality of rollers, so that one of the grinding tools of the grinding apparatus, for example, is one lens surface, and the other grinding tool is the other lens surface. When an external force greater than the external force acting on the lens is applied, the lens gripping position by the plurality of rollers may shift, and high-precision lens processing may not be realized.

  An object of the present invention is to provide a lens processing apparatus and a lens processing method capable of processing both lens surfaces of a lens simultaneously and with high precision.

The lens processing apparatus according to the first aspect of the present invention includes a lens having two lens surfaces arranged facing one and the other in the lens central axis direction and an outer peripheral end surface arranged facing the lens radial direction. A lens holder provided with a gripping mechanism for gripping the outer peripheral end face of the lens around the through hole, and a holder support mechanism for supporting the lens holder rotatably around the rotation axis A rotational drive mechanism for rotationally driving the lens holder around a rotation axis; and a processing mechanism for simultaneously processing both lens surfaces of the lens disposed on both sides of the lens holder and held and held by the lens holder. Yes, and the lens holder, by holding the outer peripheral edge surface of the lens housed in said through hole has a plurality of gripping portions for holding the lens, the machining mechanism The two lens surfaces are simultaneously processed by contacting the lens held by the plurality of gripping portions with the two lens surfaces arranged facing one and the other in the lens central axis direction 2. It is characterized by having two processing tools .

  A lens processing apparatus according to a second aspect of the present invention is the lens processing apparatus according to the first aspect, wherein the holder support mechanism includes a mechanism that rotatably supports the outer peripheral portion of the lens holder on a mounting plate. It is characterized by that.

  A lens processing apparatus according to a third aspect of the present invention is the lens processing apparatus according to the first or second aspect, wherein the rotational drive mechanism is configured using a transmission mechanism provided in a lens holder and a drive source. It is a feature.

  A lens processing apparatus according to a fourth aspect of the present invention is the lens processing apparatus according to any one of the first to third aspects, characterized in that the lens holder holds the lens hollow and is fixed with reference to the lens end face. is there.

According to a fifth aspect of the present invention, in the lens processing apparatus according to the first to fourth aspects of the present invention, the lens has a lens center axis that passes perpendicularly through the geometric center of the lens and is at least substantially parallel to the rotation axis of the lens holder. It is arranged and held.

A lens processing apparatus according to a sixth aspect of the present invention is the lens processing apparatus according to any of the first to fifth aspects, wherein the peripheral edge of the lens before processing is a curved surface symmetrical with respect to the lens central axis passing through the lens geometric center. It is characterized by this.

  A lens processing apparatus according to a seventh aspect of the present invention is the lens processing apparatus according to any one of the first to sixth aspects, wherein the upper surface and the lower surface of the lens before processing are spherical or flat.

  The lens processing apparatus according to an eighth aspect of the invention is characterized in that, in the inventions according to the first to seventh aspects, the upper surface and the lower surface of the lens before processing have a meniscus shape.

  According to a ninth aspect of the present invention, in the lens processing apparatus according to the first to eighth aspects, the outer shape of the lens is substantially circular.

According to a tenth aspect of the present invention, there is provided a lens processing method using the lens processing device according to any one of the first to ninth aspects, wherein an outer peripheral end surface of the lens is held by a lens holder, the lens holder, a processing mechanism, Both lens surfaces of the lens are processed simultaneously by relative rotation of the lens.

  According to the present invention, since the holding mechanism of the lens holder holds the lens outer peripheral end surface, the lens can be stably fixed. When the lens holder is rotated, the lens holder is rotated around the rotation axis with high accuracy by the holder support mechanism and the rotation drive mechanism. From these things, when processing both lens surfaces of the lens held by the lens holder at the same time by the processing mechanism, high-precision processing can be realized.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

[A] First embodiment (FIGS. 1 to 3)
FIG. 1 is a front cross-sectional view showing a first embodiment of a lens processing apparatus according to the present invention. 2A and 2B show the lens holder and the holder support mechanism of FIG. 1, where FIG. 2A is a front view and FIG. 2B is a side sectional view.

(Configuration of lens processing equipment)
A lens processing apparatus 10 shown in FIG. 1 processes (i.e., cuts, grinds, polishes) both lens surfaces 3 </ b> A and 3 </ b> B of a lens 1 that is a workpiece, a lens holder 11 that holds the lens 1, A holder support mechanism 12 that supports the lens holder 11, a rotational drive mechanism 13 that rotationally drives the lens holder 11, and a processing mechanism 14 that processes both lens surfaces of the lens 1 are configured.

  As shown in FIG. 2, the lens holder 11 includes a ring-shaped holder body 16 having a through hole 15 and a gripping mechanism 17. The through hole 15 is formed so as to penetrate through the central position of the holder body 16 and is sized to accommodate the lens 1 before processing (hereinafter simply referred to as the lens 1). In addition, the gripping mechanism 17 includes a plurality of (for example, three) claws 18 arranged at substantially equal intervals around the through hole 15 in the holder main body 16. These claws 18 are provided so as to be able to advance and retreat, and grip the outer peripheral end surface 2 of the lens 1 accommodated in the through hole 15 when advanced. Thereby, the lens 1 is held by the lens holder 11. When the lens 1 is held by the lens holder 11, the lens 1 is positioned so that its central axis is substantially coincident with or parallel to the rotation axis O of the lens holder 11.

  The holder support mechanism 12 supports the lens holder 11 on the mounting plate 19 so as to be rotatable around the rotation axis O. That is, a mounting hole 20 is formed at the center position of the mounting plate 19, and a bearing (for example, an angular bearing) 21 is provided in the mounting hole 20. By fitting the outer peripheral portion of the lens holder 11 to the inner ring of the bearing 21, the outer peripheral portion of the lens holder 11 is supported by the mounting plate 19 so that it can roll. Thereby, the lens holder 11 is attached to the attachment plate 19 so as to be rotatable around the rotation axis O. The mounting plate 19 on which the lens holder 11 is supported in this manner is installed on the frame 26 as shown in FIG.

  The rotational drive mechanism 13 rotates the lens holder 11 around the rotational axis O, and includes a motor 22, a drive pulley 23, a driven pulley 24, and a belt 25. As shown in FIGS. 2 and 3, the motor 22 as a drive source is installed on the back surface of the mounting plate 19, and the drive pulley 23 is rotatably supported on the motor shaft of the motor 22. The driven pulley 24 is integrally provided on the back side of the holder body 16. A belt 25 is wound around the driving pulley 23 and the driven pulley 24. Accordingly, the driving force of the motor 22 is transmitted to the holder main body 16 through the above-described driving pulley 23, belt 25 and driven pulley 24 constituting the winding transmission mechanism, so that the lens holder 11 is rotated around the rotation axis O. It is rotationally driven in the direction of arrow A (FIG. 1).

  The lens holder 11 is rotated by controlling the motor 22 by a control device (not shown). Further, for example, a rotation angle detection sensor such as a rotary encoder may be attached to the motor shaft of the motor 22 to detect the rotation position of the lens holder 11, and the rotation position of the lens holder 11 may be transmitted to the control device. .

  As shown in FIG. 1, the processing mechanism 14 includes a pair of spindles 28 and 29 each having processing tools (for example, milling cutters) 27 </ b> A and 27 </ b> B arranged on the front side and the back side of the lens holder 11. Is done. These spindles 28 and 29 are arranged in a horizontal direction perpendicular to the rotation axis O of the lens holder 11 (arrow X direction in FIG. 1) and in a vertical direction parallel to the rotation axis O of the lens holder 11 (arrow Y direction in FIG. 1). In addition, each is movably attached to the frame 26. The processing tools 27A and 27B are rotationally driven in the direction of arrow B by spindles 28 and 29, respectively. The rotation of the machining tools 27A and 27B and the horizontal and vertical movements of the spindles 28 and 29 are controlled by a drive source and a control device (not shown).

  Due to the rotation of the processing tools 27A and 27B and the horizontal and vertical movements of the spindles 28 and 29, both the lens surfaces 3A and 3B of the lens 1 are processed simultaneously by the processing tools 27A and 27B (that is, cutting, grinding, Polished). At this time, the lens holder 11 may be in a stopped state, but by rotating with the rotation drive mechanism 13, the lens surfaces 3A and 3B of the lens 1 are desired in a short time in combination with the rotation of the processing tools 27A and 27B. It becomes possible to process the shape.

  Further, by controlling the rotation angle of the lens holder 11 by the rotation drive mechanism 13 based on the detection signal from the rotation angle detection sensor, at least one of the lens surfaces 3A and 3B is an aspheric lens or progressive multifocal. It becomes possible to satisfactorily process the lens surfaces 3A and 3B of the asymmetric lens 1 such as a lens.

(About the lens before processing)
In the present invention, it is preferable that the lens blank preliminarily processed lens (hereinafter also referred to as “lens blank”) has a smooth curved surface at the end face of the peripheral edge of the lens blank in order to ensure the holding when the lens holder 11 is installed. Specifically, the shape of the lens blank peripheral edge is preferably a shape such as a cylindrical side surface, but a shape (for example, a flat surface) corresponding to the holding portion is formed on at least a part of the lens peripheral edge. Is preferable.

As the shape of the uneven surface of the lens blank, for example, flat surfaces such as an upper surface and a lower surface of a cylinder are also suitable, but a meniscus shape in which both surfaces are formed as spherical surfaces is suitable.
On the other hand, the upper and lower surfaces of the lens blanks may have any shape. This is because the end face of the lens blank peripheral edge is the holding position. For example, a lens blank may be formed by appropriately cutting a cylindrical lens blank wafer that is long in the height direction into a predetermined thickness. In that case, the cut surface is not limited to a flat surface or a spherical surface, and may have a shape in which irregularities exist irregularly and are placed on a flat place and are not stable.

  Further, the shape of the lens blank (the shape of the lens when viewed from the upper surface of the lens) is preferably a circular shape, but may be a shape having a low roundness such as an ellipse.

(Lens arrangement before processing)
In general, the optical performance of a lens depends not only on the accuracy of each concave-convex optical surface, but also on the relative positional accuracy of each concave-convex optical surface. For example, if a deviation occurs in the optical center position of the single focus lens, the astigmatism axis direction, the position and direction of the near and far portions of the progressive power lens, the desired optical performance of the lens cannot be satisfied. Specifically, in the lens blank, the optical performance of the lens cannot be satisfied unless the lens center axis passing perpendicularly through the geometric center of the lens is aligned with the rotation axis of the processing machine.

  Therefore, when processing each side of a lens as in the past, the relative position is controlled based on a specific reference position (for example, an alignment reference position, etc.) marked after single-side processing, or the lens blanks outer diameter. It was necessary to perform blocking and indirectly guarantee the relative position of the concave-convex optical surface.

  In addition, it is necessary to perform blocking with high accuracy regardless of the complicated shape of the optical surface of a lens after single-side processing (for example, a progressive power lens, a double-sided aspherical progressive power lens, etc.).

  However, in the present embodiment of the present invention, both lens surfaces of the lens blank are processed simultaneously by the lens processing method described below, instead of processing one surface at a time as in the prior art. Accordingly, it is not necessary to perform the blocking, and it is possible to process the lens blank with high accuracy while matching the lens central axis with the rotation axis of the processing machine.

(Lens processing method)
Next, a processing method for processing the lens surfaces 3A and 3B of the lens 1 using the lens processing apparatus 10 described above will be described.

  In a state where the spindles 28 and 29 are separated from the lens holder 11, the lens 1 is accommodated in the through hole 15 of the lens holder 11, and the outer peripheral end surface 2 of the lens 1 is gripped by the claw 18 of the gripping mechanism 17. 1 is held by the lens holder 11.

  Next, the processing tools 27A and 27B of the processing mechanism 14 are rotated by the control device, and the spindles 28 and 29 are moved in the horizontal direction (arrow X direction in FIG. 1) and the vertical direction (arrow Y direction in FIG. 1). The lens surfaces 3A and 3B of the lens 1 are processed (cut, ground, polished) simultaneously. At the time of this processing, the rotation drive mechanism 13 is controlled by the control device so that the lens holder 11 is rotated around the rotation axis O or is stopped. In any case, the lens surface 3A of the lens 1 is moved by relative movement including relative rotation between the lens 1 held by the lens holder 11 and the processing tools 27A and 27B of the spindles 28 and 29 in the processing mechanism 14. And 3B are processed simultaneously.

  When the processing of the lens 1 is completed, the spindles 28 and 29 are separated from the lens holder 11 by the control device, the processing tools 27A and 27B of the spindles 28 and 29 are stopped, and the lens holder 11 is rotated. Stops its rotation. Thereafter, the processed lens 1 is removed from the lens holder 11.

  With the configuration as described above, the following effects (1) to (4) are achieved according to the above embodiment.

  (1) Since the lens holder 11 holds the lens 1 by the gripping mechanism 17 (that is, the three claws 18) of the lens holder 11 gripping the outer peripheral end surface 2 of the lens 1, the lens 1 can be stably fixed. . When the lens holder 11 is rotated, the lens holder 11 is rotated around the rotation axis O with high accuracy by the holder support mechanism 12 and the rotation drive mechanism 13. For these reasons, when both the lens surfaces 3A and 3B of the lens 1 held by the lens holder 11 are simultaneously processed (cut, ground, polished) by each of the processing tools 27A and 27B of the processing mechanism 14, high accuracy is achieved. Can be realized.

  (2) When the lens surfaces 3A and 3B of the lens 1 held by the lens holder 11 are simultaneously processed (cut, ground, polished) by the processing tools 27A and 27B of the processing mechanism 14, the lens holder 11 is When rotating around the rotation axis O, the lens surfaces 3A and 3B of the lens holder 1 can be processed into a desired shape in a short time in combination with the rotation of the processing tools 27A and 27B in the direction of arrow B.

  (3) A rotation angle detection sensor when the lens surfaces 3A and 3B of the lens 1 held by the lens holder 11 are simultaneously processed (cut, ground, polished) by the processing tools 27A and 27B of the processing mechanism 14, respectively. When the rotation angle of the lens holder 11 around the rotation axis O is controlled by the rotation drive mechanism 13 based on the detection signal from the lens, the aspherical lens in which at least one of the lens surfaces 3A and 3B is aspherical, or progressive multifocal Even with an asymmetric lens 1 such as a lens, the lens surfaces 3A and 3B can be processed satisfactorily.

  (4) In this embodiment, since both surfaces of a lens are processed simultaneously, the relative position of an uneven | corrugated optical surface can be controlled directly, and a lens central axis and the rotating shaft of a processing machine can be made to correspond. In addition, high-accuracy blocking and lens layout that are conventionally performed are not necessary. In addition, since simple lens blanks can be selected, the lens blanks can be easily placed on the lens holder 11. Even lens blanks with low roundness can be held in the lens holder 11, and by accurately grasping the concave-convex optical surface and its relative arrangement, it is easy to process a spectacle lens with high optical performance. It becomes.

[B] Second embodiment (FIG. 4)
FIG. 4 is a front cross-sectional view showing a second embodiment of the lens processing apparatus according to the present invention. In the second embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  The lens processing device 30 of the second embodiment is different from the lens processing device 10 in a processing tool 31 in the processing mechanism 14. That is, the processing tool 27 of the present embodiment is a rotary cutter (for example, a milling cutter), whereas the processing tool 31 of the present embodiment is a fixed cutter (for example, a cutting tool). Therefore, in the present embodiment, the lens holder 11 is rotated around the rotation axis O when the lens surfaces 3A and 3B of the lens 1 held by the lens holder 11 are simultaneously processed using the processing tool 31. Is required.

  Also in this case, since the lens holder 11 is rotated with high accuracy around the rotation axis O, the same effect as the effect (1) of the first embodiment can be obtained.

  The processing tool 31 is attached to the tool support bases 32 and 33. Similar to the spindles 28 and 29, these tool support tables 32 and 33 are configured to be movable in the X and Y directions.

[C] Third embodiment (FIGS. 5 to 7)
5A and 5B show a lens holder and a holder support mechanism according to a third embodiment of the lens processing apparatus according to the present invention, in which FIG. 5A is a front view and FIG. 5B is a side sectional view. 6A and 6B show the lens holder of FIG. 5, where FIG. 6A is a front view and FIG. 6B is a side view. In the third embodiment, the same parts as those of the first embodiment are denoted by the same reference numerals and the description thereof is omitted.

  The lens processing device 40 of the third embodiment is different from the lens processing device 10 in the structure of a lens holder 41, a holder support mechanism 42, and a rotation drive mechanism 43.

  That is, the lens holder 41 includes a disc-shaped holder main body 45 having a through hole 44 in the center and a gripping mechanism 46 having a link structure. The through hole 44 of the holder body 45 is set to a size that can accommodate the lens 1. Further, the holder main body 45 is formed with a driven gear 47 to be described later on the outer periphery on the back side. Furthermore, the outer periphery on the surface side of the holder main body 45 is formed to have a larger diameter than the driven gear 47 and is configured as a fitting convex portion 48 described later.

  As shown in FIGS. 6 and 7, the gripping mechanism 46 is disposed on the surface side of the holder main body 45 where the through hole 44 is desired. The gripping mechanism 46 is substantially rectangular and has a central bent portion rotatably supported by a pin 49. A plurality of, for example, three claws 50, a ring-shaped connecting ring 51 that supports the base ends of the claws 50, and a plurality of claws 50 interposed between the base ends of the claws 50 and the holder main body 45. And (for example, three) coil springs 58.

  The claws 50 are arranged at equal intervals around the through hole 44 on the surface side of the holder main body 45. Further, the tip of each claw 50 is rotated toward the through hole 44 by the tensile force of the coil spring 58, and these tips are held in contact with the outer peripheral end surface 2 of the lens 1 accommodated in the through hole 44. The lens 1 is held by the lens holder 41. The connecting ring 51 functions to operate the three claws 50 in synchronization with each other.

  As shown in FIGS. 5 and 7, the holder support mechanism 42 has a plurality of, for example, four, installed around the mounting hole 52 on the back side of the mounting plate 53 in which the mounting hole 52 is formed in the center. And the fitting convex portion 48 of the lens holder 41 fitted in the fitting groove 55 of these rollers 54.

  The gripping mechanism 46 of the lens holder 41 is disposed in the mounting hole 52 so that the fitting convex portion 48 of the lens holder 41 is fitted to the roller 54 of the mounting plate 53, and the lens holder 41 is rotated around the rotation axis O. The mounting plate 53 is rotatably supported. In this state, when the lens 1 is held by the lens holder 41, the central axis of the lens 1 is positioned so as to be substantially coincident with or parallel to the rotation axis O of the lens holder 41. Further, when the fitting convex portion 48 of the lens holder 41 and the fitting groove 55 of the roller 54 are fitted, the movement of the lens holder 41 in the direction of the rotation axis O is restricted.

  As shown in FIGS. 5 and 7, the rotation drive mechanism 43 rotates the lens holder 41 around the rotation axis O, and includes a motor 56, a drive gear 57, and the driven gear 47. The The motor 56 is installed on the back surface of the mounting plate 53, and the drive gear 57 is fixed to the motor shaft of the motor 56. The drive gear 57 is always meshed with the driven gear 47 of the lens holder 41 to constitute a gear transmission mechanism. Accordingly, the lens holder 41 is driven to rotate about the rotation axis O through the drive gear 57 and the driven gear 47 by the driving force of the motor 56.

  According to the lens processing device 40 of the third embodiment, the outer peripheral end surface 2 of the lens 1 is gripped by the claw 50 of the gripping mechanism 46 in the lens holder 41, and the lens 1 is stably fixed to the lens holder 41. Can hold. Further, the fitting convex portion 48 of the lens holder 41 is fitted into the fitting groove 55 in the roller 54 of the holder support mechanism 42, so that the movement of the lens holder 41 in the direction of the rotation axis O is restricted. In addition, the lens holder 41 is rotationally driven by the action of the holder support mechanism 42 and the rotation drive mechanism 43. For these reasons, in the lens processing apparatus 40 of the present embodiment, the lens surfaces 3A and 3B of the lens 1 held by the lens holder 41 are simultaneously processed with high accuracy using the processing tool 27 or 31. Can do. In addition, the same effects as the effects (2) and (3) of the first embodiment are obtained.

[D] Fourth embodiment (FIG. 8)
8A and 8B show a lens holder and a holder support mechanism according to a fourth embodiment of the lens processing apparatus according to the present invention, in which FIG. 8A is a perspective view viewed from the front surface side, and FIG. 8B is a perspective view viewed from the back surface side. FIG. In the fourth embodiment, the same parts as those in the first, second, and third embodiments are denoted by the same reference numerals and the description thereof is omitted.

  The lens processing device 60 of the fourth embodiment is different from the lens processing device 40 of the third embodiment in the structure of the gripping mechanism 62 in the lens holder 61. That is, the gripping mechanism 62 includes a plurality of, for example, three screws 63 arranged at equal intervals around the through hole 44 in the holder main body 45. These screws 63 come into contact with the outer peripheral end surface 2 of the lens 1 accommodated in the through hole 44 of the holder main body 45, so that the outer peripheral end surface 2 is gripped, and the lens 1 is fixedly held by the lens holder 61.

  Others are the same as the lens processing device 40 of the third embodiment, and therefore the lens processing device 60 of the present embodiment also has the same effect as the lens processing device 40.

[E] Fifth embodiment (FIG. 9)
FIG. 9 is a front cross-sectional view showing a fifth embodiment of the lens processing apparatus according to the present invention. In the fifth embodiment, the same parts as those in the first, second, third and fourth embodiments are denoted by the same reference numerals and the description thereof is omitted.

  The lens processing device 70 of the fifth embodiment is different from the lens processing device 10 of the first embodiment in that a cross roller bearing 71 is used instead of the angular bearing 21.

  The cross roller bearing is a bearing in which cylindrical rollers are alternately arranged on a V-groove-shaped rolling surface through a cage. The cross roller bearing has a feature that it can receive loads in any direction (radial load, axial load, moment load).

  In the fifth embodiment, by using the cross roller bearing 71, it is possible to support the addition from the vertical direction (rotation axis direction), while allowing the lens holder 11 to rotate freely in the left-right (rotation) direction. Easy to do.

  Others are the same as the lens processing apparatus 10 of the first embodiment, and therefore the lens processing apparatus 70 of the present embodiment also has the same effects as the effects of the lens processing apparatus 10.

  As mentioned above, although this invention was demonstrated based on the said embodiment, this invention is not limited to this. For example, the holder support mechanism that rotatably supports the lens holder 11 may be an air bearing provided between the mounting hole 20 of the mounting plate 19 and the lens holder 11. Further, as a rotation drive mechanism of the lens holder 11, a plurality of magnets are arranged around the lens holder 11, a coil is installed on the mounting plate 19, and the coil holder is energized to cause the lens holder 11 to act by electromagnetic induction. It may be driven to rotate around the rotation axis O.

It is a front sectional view showing a 1st embodiment in a lens processing device concerning the present invention. 2A and 2B show the lens holder and the holder support mechanism of FIG. 1, where FIG. 2A is a front view and FIG. 2B is a side sectional view. FIG. 3 is a perspective view of the lens holder and the holder support mechanism of FIG. 2, (A) is a perspective view viewed from the front side, and (B) is a perspective view viewed from the back side. It is front sectional drawing which shows 2nd Embodiment in the lens processing apparatus which concerns on this invention. The lens holder and holder support mechanism of 3rd Embodiment in the lens processing apparatus which concerns on this invention are shown, (A) is a front view, (B) is side sectional drawing. The lens holder of FIG. 5 is shown, (A) is a front view, (B) is a side view. FIG. 6A is a perspective view of the lens holder and the holder support mechanism of FIG. 5, (A) is a perspective view viewed from the front surface side, and (B) is a perspective view viewed from the back surface side. The lens holder and holder support mechanism of 4th Embodiment in the lens processing apparatus which concerns on this invention are shown, (A) is the perspective view seen from the surface side, (B) is the perspective view seen from the back side. It is front sectional drawing which shows 5th Embodiment in the lens processing apparatus which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lens 2 Outer peripheral end surface 3A, 3B Lens surface 10 Lens processing apparatus 11 Lens holder 12 Holder support mechanism 13 Rotation drive mechanism 14 Processing mechanism 15 Through-hole 17 Grip mechanism 18 Claw 19 Mounting plate 21 Bearing 23 Drive pulley 24 Drive pulley 25 Belt 27A , 27B Processing tool 28, 29 Spindle 30 Lens processing device 31 Processing tool 40 Lens processing device 41 Lens holder 42 Holder support mechanism 43 Rotation drive mechanism 44 Through hole 46 Grip mechanism 47 Drive gear 50 Claw 53 Mounting plate 54 Roller 57 Drive gear 60 Lens processing device 61 Lens holder 62 Grip mechanism 63 Screw 70 Lens processing device 71 Cross roller bearing

Claims (10)

A through-hole capable of accommodating a lens having two lens surfaces arranged facing one and the other in the lens central axis direction and an outer peripheral end surface arranged facing the lens radial direction ; A lens holder provided with a gripping mechanism for gripping the outer peripheral end surface of the lens around,
A holder support mechanism for rotatably supporting the lens holder around a rotation axis;
A rotational drive mechanism for rotationally driving the lens holder around a rotational axis;
The lens is arranged on both sides of the holder, I have a, a processing mechanism for simultaneously machining the both lens surfaces of the lens are housed in the holder with gripped lens,
The lens holder has a plurality of gripping portions for holding the lens by gripping the outer peripheral end surface of the lens accommodated in the through hole,
The processing mechanism is configured to contact the lens surfaces held by the plurality of gripping portions with the lens surfaces arranged to face one and the other in the lens central axis direction so that both the lens surfaces are in contact with each other. A lens processing apparatus having two processing tools for processing simultaneously .   The lens processing apparatus according to claim 1, wherein the holder support mechanism includes a mechanism that rotatably supports an outer peripheral portion of the lens holder on a mounting plate.   The lens processing apparatus according to claim 1, wherein the rotation drive mechanism is configured by using a transmission mechanism provided in a lens holder and a drive source.   The lens processing apparatus according to claim 1, wherein the lens holder holds the lens in a hollow shape and fixes the lens with reference to the lens end surface. 5. The lens processing apparatus according to claim 1, wherein the lens is held such that a lens center axis passing perpendicularly through a geometric center of the lens is arranged at least substantially parallel to a rotation axis of the lens holder. . 6. The lens processing apparatus according to claim 1, wherein the peripheral edge of the lens before processing is a curved surface that is symmetrical with respect to the lens center axis passing through the lens geometric center.   7. The lens processing apparatus according to claim 1, wherein the upper surface and the lower surface of the lens before processing are spherical or flat.   The lens processing apparatus according to claim 1, wherein the upper surface and the lower surface of the lens before processing have a meniscus shape.   The lens processing apparatus according to claim 1, wherein the lens outer shape is substantially circular. Using the lens processing device according to any one of claims 1 to 9, a lens holder holds the outer peripheral end surface of the lens, and both lens surfaces of the lens are processed simultaneously by relative rotation between the lens holder and a processing mechanism. A lens processing method characterized by the above.

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