JP3070084B2 - Polishing method of optical glass - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for polishing an optical glass in which both sides are pitch-polished, and more particularly to a method for polishing an optical glass having a high degree of parallelism and eccentricity of a laser mirror or the like. .

[Conventional technology]

Conventionally, the optical glass polishing method of polishing both sides pitch, the optical glass is first adhered and fixed using a wax attached to a polishing dish, and one side of the optical glass is polished using an abrasive,
Then, as shown in FIG.
13 are individually removed, the polished one side 13a is arranged on the suction tray 12 with the one side 13a facing upward, and a plurality of optical glasses 13 are bonded and fixed to another bonding polishing plate 14 by a bonding wax 15,
The other side was polished.

[Problems to be solved by the invention]

In this conventional polishing method, after one-side polishing, the optical glass must be removed one by one from the polishing dish and carefully washed so as not to scratch the polished surface. Since it is once removed from the plate, the difference in the angle and wall thickness depending on the position of the attached polishing plate will occur.
It was difficult to improve the accuracy of the parallelism and eccentricity.

In addition, there is a problem in that it takes time to peel off the optical glass individually and attach the optical glass again, and there are many steps, so that there is a problem that artificial handling scratches increase.

An object of the present invention is to provide a method for polishing optical glass in which the polishing step is shortened.

[Means for solving the problem]

In order to achieve the above object, in the method for polishing an optical glass according to the present invention, a first polishing step, a transfer step,
And a second polishing step, wherein the optical glass is polished one side at a time. The first polishing step is to fix the optical glass to a first pasting polishing plate with an adhesive wax. The transfer step is a step of polishing one side of the optical glass while adhering and fixing the optical glass to the first bonded polishing dish to a second bonded polishing dish. Is a step of peeling off the optical glass from the first attached polishing dish, and the second polishing step is a step of polishing the other unpolished surface of the optical glass adhered and fixed to the second attached polishing dish. Is what you do.

[Action]

While the plurality of optical glasses are adhered and fixed to the attached polishing plate, they are adhered and fixed to another attached polishing plate, and one of the attached polishing plates is peeled off from the optical glass, and then the next polishing step is performed. Therefore, the step of individually peeling off the optical glass and transferring it to another affixed polishing dish is omitted.

〔Example〕

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

First Embodiment FIGS. 1 and 2 are cross-sectional views for explaining a first embodiment of the present invention.

The present embodiment is applied to a case where a parallel plate-shaped optical glass is polished. That is, in the drawing, a plurality of optical glasses 1 are attached to a flat surface 4a of an attaching polishing plate 4 with an attaching wax 2a, and one side 1a of the optical glass 1 is polished using an abrasive.

After the one-side polishing is completed, the optical glass 1 is kept affixed to the first affixing polishing dish 4 as shown in FIG.
Is set with the polished single side 1a facing upward. On the other hand, an adhesive wax 2b is applied to the lower flat surface 3a of the second adhesive polishing dish 3, and the first adhesive polishing dish 4 and the second adhesive polishing dish 3 are maintained in a parallel posture relationship, and the second adhesive polishing dish 3 Lower flat surface 3a of polishing dish 3
Is pressed against the polished one side 1a of the optical glass 1 on the first pasting and polishing dish 4, and the one side 1a of the optical glass 1 is flat on the lower surface of the second pasting and polishing dish 3. Affix to 3a with the wax 2b. In this state, both surfaces of the optical glass 1 are attached to the attached polishing plates 3 and 4, respectively.

Next, as shown in FIG. 2, the adhesive wax 2a of the first adhesive polishing dish 4 is immersed in a coolant liquid 5 cooled to 0 ° C. or lower, for example, methanol, and the adhesive wax 2a is polished for the optical glass 1. It is peeled off from the one side 1a which is not performed. As a result, the optical glass 1 is moved from the first attached polishing dish 4 to the second attached polishing dish 3
And the unpolished one side 1b is exposed.

Next, the other side 1b of the optical glass 1 is polished with an abrasive while the optical glass 1 is adhered to the second attaching polishing plate 3. In this case, the attached wax 2a attached to the one surface 1b of the optical glass 1 is shaved when the one surface 1b is polished, and thus does not need to be washed.

According to this embodiment, a plurality of optical glasses 1 are not individually peeled and transferred, but are attached to one attached polishing dish and attached to another attached polishing dish and transferred simultaneously. No error occurs, and a difference in angle and thickness due to an error in the attaching position can be reduced, and the parallelism can be finished with high accuracy.

Embodiment 2 FIGS. 3 and 4 are cross-sectional views for explaining Embodiment 2 of the present invention.

The present embodiment is applied to a case where a curved optical glass having one surface convex and the other surface concave is polished. That is, in the figure, the curved optical glass 6 is adhered to the convex curved surface 9a of the first attaching / polishing dish 9 by the attaching wax 7a, and one side 6a of the optical glass 6 is polished in a convex shape.

After the one-side polishing, the optical glass 6 is set with the polished one side 6a facing upward while the optical glass 6 is stuck on the first sticking polishing dish 9 as shown in FIG. On the other hand, an adhesive wax 7b is applied to the concave lower curved surface 8a of the second attached polishing dish 8, and the curvature centers of the uneven curved surfaces 9a, 8a of the first attached polishing dish 9 and the second attached polishing dish 8 are adjusted. The two curved surfaces 8a, 9a are kept in a parallel posture so as to be in parallel with each other, and the adhesive wax 7b applied to the concave lower curved surface 8a of the second adhesive polishing plate 8 is removed from the first adhesive polishing plate 9.
The upper surface 6a of the optical glass 6 is pressed against the polished one surface 6a, and the one surface 6a of the optical glass 6 is affixed to the concave lower curved surface 8a of the second affixing polishing dish 8 with an adhesive wax 7b. In this state, both surfaces of the optical glass 6 are attached to the attached polishing plates 8, 9, respectively.

Next, as shown in FIG. 4, the adhesive wax 7a of the first adhesive polishing dish 9 is immersed in a coolant liquid 10 cooled to 0 ° C. or less, for example, methanol, and the adhesive wax 7a is polished for the optical glass 6. It is peeled off from the one side 6b that has not been subjected to. As a result, the optical glass 6 is moved from the first bonded polishing dish 9 to the second bonded polishing dish 8.
And the unpolished one side 6b is exposed.

Next, with the optical glass 6 still attached to the second attaching polishing dish 8, the remaining one surface 6b of the optical glass 6 is polished with an abrasive. In this case, the attached wax 7a attached to the one surface 6b of the optical glass 6 is shaved when the one surface 6b is polished, and thus does not need to be washed.

 This embodiment also has the same effects as the first embodiment.

In addition, in Example 1, when arranging the attached polishing plates face to face, as shown in FIG.
By using, positioning can be performed with high accuracy and easily. Also in the second embodiment, the same effect can be obtained by using a jig similar to the jig shown in FIG. 5 when facing the attached polishing plates.

〔The invention's effect〕

As described above, according to the present invention, a plurality of optical glasses are not individually peeled and transferred, and simultaneously transferred to another bonded polishing plate, so that no error occurs in the mounting position of the optical glass, and the bonded glass is attached. It is possible to reduce the difference in angle and wall thickness due to the position error, and to obtain an optical glass with high parallelism and eccentricity. Further, by shortening the polishing step, it is possible to reduce the processing time and to reduce the number of artificial handling scratches.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a first embodiment of the present invention, and FIG.
FIG. 3 is a cross-sectional view showing a step of transferring a parallel plate-shaped optical glass, FIG. 3 is a cross-sectional view showing a second embodiment of the present invention, FIG. FIG. 6 is a cross-sectional view showing a step of transferring a parallel plate optical glass using a jig, and FIG. 6 is a cross-sectional view showing a conventional example. 1,6 ... optical glass, 2a, 2b, 7a, 7b ... sticking wax 3,4,8,9 ... sticking polishing dish, 5,10 ... refrigerant liquid

Claims (1)

(57) [Claims] 1. An optical glass polishing method for polishing an optical glass one surface at a time, comprising a first polishing step, a transfer step, and a second polishing step, wherein the first polishing step comprises: A step of polishing and fixing one side of the optical glass by bonding and fixing the optical glass to a first bonding and polishing plate with a bonding wax; and in the transfer step, the optical glass is bonded and fixed to the first bonding and polishing plate. One side of the polished optical glass is adhered and fixed to a second pasting and polishing dish with a wax, and the optical glass is peeled off from the first pasting and polishing dish. The second polishing step is a second pasting and polishing step. A method of polishing an optical glass, characterized by a step of polishing the other unpolished surface of the optical glass adhered and fixed to a plate.