KR940004677B1 - Holding device for polishing optical element - Google Patents

Abstract

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Description

Protective holding device for polishing optical elements

1 is a conceptual diagram of a polishing protection and holding device for an optical element according to claim 1 of the present invention.

2 is a conceptual diagram of a polishing protection and holding device for an optical element according to claim 2 of the present invention.

Fig. 3A is a front sectional view showing a first embodiment of the polishing protection and holding device for an optical element according to the present invention.

FIG. 3B is a sectional front view showing a modification of FIG. 3A. FIG.

4A is a front sectional view showing a second embodiment of the polishing protection and holding device for an optical element according to the present invention.

4B is a front sectional view showing a modification of FIG. 4A.

Fig. 5 is a front sectional view showing a third embodiment of the polishing and holding device for polishing an optical element according to the present invention.

6 and 7 are explanatory views of the prior art.

* Explanation of symbols for main parts of the drawings

1: Abrasive plate 2: Abrasive holder

3: lens 4: elastic material

5: Horde spindle 6: Horde shaft

7: bearing 8: spindle

10: polishing plate 11: lens driving period

12: inverted com-shaped body 13: elastic ring

14: Lens protective holding zone 15: Lens

16: main part 17: hole

18: communication hole 20: housing

21: the main body 22: the lens

23: retaining ring 24: receiving material

30: processed workpiece holder 31: bearing

32: screw portion 33: collar

34: C ring 35: hole

36, 37: spherical portion 38, 39: communication hole

40, 41: spherical portion 50: main portion

51, 52: spherical portion 53: main portion

60, 61: main part 62: inclined motion promoting member

63: V ring

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a protective holding device for a lens, a prism or the like for protecting and polishing an optical fiber. Conventionally, as a technique regarding this kind of abrasive workpiece holder, there is a technique disclosed in Japanese Patent Application Laid-Open No. 61-121862 and a technique disclosed in Japanese Patent Application Laid-Open No. 62-37627.

As shown in FIG. 6, the technique disclosed in Japanese Patent Laid-Open No. 61-121862 rotates and rotates the polishing plate 1 while the polishing foil 2 is moved perpendicularly to the centripetal direction of the soft wave plate 1. In the apparatus for fixing the lens 3 by being fixed and pressurized, the elastic material 4 is attached to the tip end of the polishing foil holder 2 described above, and the holder shaft 6 is mounted by the holder spindles 5 again. ) To be compressed by pressing the to-be-polished lens (3) between the abrasive plate (1) and the abrasive holder (2). What is indicated by (7) is the spindle of the abrasive plate 1 which is represented by the bearing 8 for rotationally supporting the holder spindles 5.

The polishing mechanism of the above-described structure is characterized in that the polishing foil holder 2 having the elastic material 4 attached thereto is attached to the holder shaft 6 by the holder spindles 5. In addition, the technique disclosed in Japanese Patent Application Laid-Open No. 62-37627 shows that the polishing plate 1 rotating about the vertical and the surface of the polishing plate 1 are always perpendicular to each other, as shown in FIG. An inverted cup-like body 12, which is a lens protection holding device for use in a lens polishing machine having a lens driving section 11 moving in a direction, which is rotatably attached around its axis at the tip of the lens driving section 11; In this inverted cup-like body 12, the detachable fitting is carried out freely, and the end of this inverted cup-like body 12 is abutted by the elastic material ring 13, and the inverted cup-like body 12 is minutely attached. It is formed in the inner part at the end of the lens protective holding member 14 and the inverted cup capillary body 12 of which the lens protective holding member 14 was inclined at an angle, and is moved by the horizontal direction. To generate the lens 15 The hole is formed in the recessed portion 16 and the lens protective retainer 14 which hold the lens 12 in place, and reduce the efficiency, and communicate the recessed portion 16 with the inverted cup-like body 12. (17) and the communication hole (18) which communicates with the suction pump from the inverted cup body (12) and vacuum-adsorbs the lens protective retainer (14) and the lens (15) in the inverted cup body (12). .

According to the lens protective holding device having the above-described configuration, the lens of small diameter and thick thickness can be polished with high precision, and the work of changing the lens blade and the size of the lens can be easily performed.

However, the above-described conventional techniques were not satisfactory because they each had the following problems. That is, the technique of Japanese Patent Laid-Open No. 61-121862 does not have a mechanism for restricting the operation of the lens 3 in the radial direction. Therefore, when the abrasive is polished with a grain grindstone for fixed polishing, the lens 3 is subjected to polishing resistance. There is a problem that the axis is greatly collapsed due to the radial direction.

In this regard, the technique disclosed in Japanese Patent Application Laid-Open No. 62-37627 is restricted in the radial direction of the lens 15 by the Ez protective retainer 14, but the lens protective retainer 14 is made of rubber or the like. Since the vacuum is sucked to the inverted cup-shaped body 12 by the ring 13, the entire range of the stove protection retainer is dragged in the radial direction due to the polishing resistance during the polishing process in the same manner as in Japanese Patent Application Laid-Open No. 61-121862. There was a problem that the axis of the lens 15 was greatly missed due to light weight.

Due to such a problem, in the above-described prior art, the lens shakes during the polishing process, and if the machining becomes impossible, the precision of the processing surface becomes remarkably bad, which causes a lot of defective products.

In view of the problems of the prior art of the present invention, an object of the present invention is to provide a polishing and protecting device for polishing an optical element, which makes it possible to obtain a high-quality lens having excellent processing surface precision while preventing the shaking of the lens during polishing. It is done.

EXAMPLE

An embodiment of the present invention will be described based on the drawings.

1 and 2 are explanatory diagrams of the concept of the polishing protective holding device of the present invention, wherein the lens receiving material 24 that absorbs and holds the lens 22 is inclined with respect to the holder body 21. In addition, the shaft core is in contact with each other through such an element that the shaft is not deflected, and the outer circumferential surface of the lens 22 is configured to be moved by the fixing ring 23.

Therefore, the movement can be made freely by the space between the holder body 21 and the lens receiving member 24 and the space between the fixing ring 23 and the lens 22. In addition, in the following description, the same code | symbol is attached | subjected to the component same as the component shown in FIG. 1 or 2, and description is abbreviate | omitted.

[First Embodiment]

3A is a cross-sectional view showing the first embodiment of the abrasive workpiece holder 30 according to the present invention. As shown in the drawing, the workpiece workpiece 30 for polishing includes a housing 20, a holder body 21 in which rotation is freely supported by the bearing 31 of the housing 20, and a holder body 21. The fixing ring 23 screwed to the threaded portion 32 of the outer circumference of the < RTI ID = 0.0 >) < / RTI > and the back surface (surface opposite to the surface to be polished) of the lens 22 to be polished, to absorb the tilt of the lens 22. The lens receiving member 24 is constituted. 33 denotes a color and 34 denotes a C ring.

A hole 35 is formed in one axis of the fixing ring 23 in the axial direction (lower side in the drawing) to fit with the outer circumferential surface of the lens 22, and the hole 35 is an axis of the fixing ring 23. It is formed on the same axis as the shaft center of the holder body 21.

The degree of cleanness of fitting the hole 35 and the lens 22 is set to 0.1 mm or less, and the deviation of the radial direction of the lens 22 is set to be defined within this extremely limited necessary minimum range. A concave spherical portion 3b is formed in the axial center portion of the lower end surface of the holder body 21, and on the other hand, a concave shape is formed on the bonding surface side with the holder body 21 in the lens receiving member 24. The convex-shaped spherical part 37 which hangs and contacts so that the spherical part 3b of this side may fit is provided convexly.

That is, the displacement of the lens 22 when the lens 22 is inclined within a limited range of electricity or when a small range accompanying rotation occurs due to the polishing resistance at the time of polishing, convex shape and convex shape 36 It is comprised so that it may absorb by slipping with the spherical part 37 mutually.

In the shaft center portion of the holder body 21 and the shaft center portion of the lens receiving member 24, communication holes 38 and 39 connected to the air apparatus (not shown) are loosened and installed. It is provided so that the suction protection of the lens 22 supported by () can be maintained.

When polishing the lens 22 using the polishing workpiece holder 30 having the above-described configuration, the lens 22 is inserted into the hole 35 of the fixing ring 23, and at the same time, the communication hole 38 (39). Suctioning and holding the lens 22 on the lens receiving member 24 by the suction force through the sheet, and pressing and pressing the polishing grindstone to omit the illustration of the lens 22 held by the suction protection. will be.

In particular, according to the configuration of the present embodiment, it is possible to regulate the bareness of the lens 22 in the hole 35 of the fixing ring 23 to the minimum required amount. The convex spherical surface portion 37 and the concave spherical surface portion, even when the lens 22 suction-protected and held by the lens receiving material 24 is inclined within a limited range of electricity or a slight vibrational displacement accompanying rotation, are generated. The smoothness with each other (36) makes it possible to absorb with good followability.

As a result, it is possible to reliably prevent the shaking of the lens 22 during polishing and to obtain a lens of high quality with excellent processing surface precision. In addition, the convex spherical part 37 and the concave spherical part 36 have a convex spherical part 40 with the convex spherical part 40 as shown in FIG. The same effect can be obtained even when the side is formed in the concave spherical surface part 41.

Second Embodiment

4A is a front sectional view showing a second embodiment of the abrasive workpiece holder 30 of the present invention. The characteristic of this embodiment is formed by forming the concave spherical part 36 and the convex spherical part 37 in the conical concave part 50 and the convex spherical part 51 in the first embodiment shown in FIG. 3A. Is the point.

Since other configurations are the same as those in the first embodiment, the components are denoted by the same reference numerals and description thereof will be omitted. Also in the above configuration, the same effects as in the first embodiment can be obtained. According to the abrasive workpiece holder 30 of the present embodiment, the following effects are added again.

(1) Since the contact portions of the concave concave portion 50 and the convex spherical portion 51 are in a line contact state, the sliding movement between them becomes extremely good (improved), and the lens 22 has a fixed ring ( The followability in the case where the inclination occurs within the range of the hole 35 in 23) is extremely good.

As a result, the tilting of the lens 22 (within a very limited range) is absorbed with good followability.

(2) As for spherical machining, the machining is difficult and generally the cost is equal. Therefore, this embodiment of the present invention has the advantage of lowering the cost because the spherical machining only needs to be performed on one surface side as compared with the first embodiment.

Other operations and effects are the same as in the first embodiment, and thus description thereof is omitted.

Also in this embodiment, as in the case of the first embodiment, as shown in FIG. 4B, the convex concave portion 53 has the lens receiving material 24 side in the convex spherical portion 52 which convex the side of the main body 21. The same effect as above can be obtained even if it forms in

Third Embodiment

5 is a front sectional view showing a third embodiment of the abrasive workpiece holder 30 according to the present invention. In the present embodiment, conical recesses 60 and 61 are concave at the center portions of the holder body 21 and the lens receiving member 24 on the opposite surfaces of the holder body 21 and between the recesses 60 and 61, respectively. Install the inclined motion promoting member 62 made of steel balls (steel ball), and screw the inclined motion promoting member 62 and the lens receiving member 24 to the threaded portion 32 of the holder body 21. The protection ring is configured by the fixing ring (23). Reference numeral 63 denotes a V ring for preventing leakage of air for sucking the lens 22.

Other configurations are the same as those in the first embodiment, so that the same members are denoted by the same reference numerals and the description thereof will be omitted.

Also in this embodiment, as in the first embodiment, the fitting accuracy of the hole 35 of the fixing ring 23 and the lens 22 is set to 0.1 or less, so that the deflection in the radial direction of the lens 22 is equal to this. It is defined within the scope. Inclination of the lens 22 is easily absorbed by the sliding movement between the inclined motion promoting member 62 and the conical recesses 60 and 61, and the movement thereof is regulated by the fixing ring 23. It is regulated within 0.1 mm by action.

Therefore, also in the structure of this embodiment, the same effect as that of the first embodiment is obtained, but in the present embodiment, the following effects are added again.

(1) Since the recessed parts 60 and 61 which are in contact with the steel ball-shaped inclined motion promoting member 62 are formed in a conical shape, the contact portion with the inclined motion-promoted member 62 is in a line contact state, which is extremely good. Sliding movement is obtained.

(2) According to the configuration of the present embodiment, since the spherical processing that is costly high is unnecessary at all, low cost can be achieved.

In each of the above embodiments, one example of the processing of one type of lens shape is shown, and the lenses of various shapes are changed by changing the shape of the lens support surface of the lens receiving member 24 as in each of the embodiments. Of course, it can also be applied to.

As described above, according to the present invention, it is possible to regulate the deviation of the diameter of the lens within the minimum required range, and at the same time, to limit the inclination of the lens, that is, the small vibration displacement associated with displacement or rotation due to polishing resistance. Within a range, it can absorb well.

As a result, the polishing process can be performed without causing the shake of the lens, which is the polishing host, to provide a stable lens with high quality with excellent processing surface precision. In addition to the above effects, it is possible to improve the followability and reduce the cost.

Claims (5)

It is fixed to the head body 21 and the head body 21 which are freely rotated, and are fixed to the same axis, and the fitting hole 35 which is larger than the outer diameter of the to-be-processed optical element is provided in the lower surface side, and the to-be-processed optical element A fixed ring 23 for regulating the movement in the radial direction of the fixed ring 23 and an inner side of the fixed ring 23 so as to allow the inclined motion freely and the shaft to be displaced relative to the holder body 21. It is provided with a central part of the contact portion which is in contact with the axial center portion of the holder body 21 integrally or separately, and at the same time the fitting surface of the optical element to be fitted on its lower surface side of the fixing ring 23 A protective device for polishing an optical element, characterized in that it comprises a receiving member (24) which supports the optical element to be processed so as to protrude from the hole (35). The hooking portion of the hooking portion, which is integrally disposed on the receiving member 24, and the hooking portion of the holder body 21, which is in contact with the hooking portion, is formed by a concave spherical portion 36. It is formed, and the other side is a protective holding device for polishing of the optical element is formed of a convex spherical surface portion (37). The hooking portion of the hooking body 21 integrally disposed on the receiving member 24 and the hooking body 21 fitted with the hooking portion, on the one hand, is formed by a conical recess 50. And a protective protector for polishing an optical element, the other being formed by a convex spherical portion 51. The recessed part separately provided in the reception material 24 is each recessed part 60, 61 formed in the axial center part of the surface of the reception material 24 and the holder body 21 which opposes each other. A protective holding device for polishing an optical element formed by an inclined motion promoting member (62) which is in contact with each other. The inclined motion promoting member (62) according to claim 4, wherein the inclined motion promoting member (62) is made of steel balls and is protected by a fixing ring (23) screwed to the threaded portion (32) of the holder body (21) together with the receiving material (24). Polishing protective holding device for the optical element.