JPS6315103B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in lens polishing methods, and particularly to improvements in methods for polishing multiple lenses simultaneously.

The conventional method of polishing multiple lenses at the same time is
This is a method using a so-called kanzashi, in which a rotating polishing plate is covered with a lens sticking plate with multiple lenses attached around the center, or vice versa, a rotating polishing plate is covered with a polishing plate. This was a method of polishing by pivoting and swinging a lens attachment plate or a polishing plate. Such conventional methods have the problem that it takes a lot of time and effort to attach and detach the lens from the attachment plate, and using a collect chuck or vacuum chuck to solve this problem requires extremely expensive equipment. It is difficult to adopt because it is complicated.

Furthermore, in the conventional method, the vertical relationship between the polishing plate and the lens, that is, whether the polishing plate or the lens attachment plate should be placed over each other during polishing is determined by the unevenness or curvature of the polished surface of the lens. In general, when the polished surface of the lens is a convex surface with a large curvature,
That is, polishing is performed by covering the polishing plate and supporting it with a kanzashi. In such cases, the outer diameter of the polishing plate cannot be made larger than the effective diameter of the lens attachment plate in order to supply the polishing liquid to the surface of the lens to be polished, so the lens attachment plate must be placed over the polishing plate. Compared to the conventional case, the polishing efficiency is lower, and it is also difficult to supply the polishing liquid to the polished surface of the lens sufficiently evenly over the entire surface, which tends to cause uneven wear of the polishing plate and reduce the accuracy of the polished surface. Another problem is that it is difficult to maintain.

The present invention provides a lens polishing method that solves the above-mentioned problems. a lens outer periphery holding ring having a plurality of lens fitting holes arranged around the center thereof, a lens pressing member pressing the back side of the lens fitted into the lens fitting holes of the outer periphery holding ring, and a plurality of lens pressing members. The outer periphery holding ring comprises a pressure transmitting member that simultaneously presses the back side of the member, a pressing portion that presses the center portion of the back side of the pressure transmitting member, and a driven roller that receives the outer periphery of the outer periphery holding ring at at least two places, respectively. is inserted into the fitting hole of the outer peripheral retaining ring by rotating at least one of the polishing plate or the support member around the center of the polishing surface using a support member that holds the polishing plate at a position apart from the center of the polishing surface of the polishing plate. It is characterized by polishing the lens.

Hereinafter, the present invention will be explained based on the drawings.

1 and 2 are side views showing an example of the embodiment of the present invention, and FIG. 3 is a partial plan view of FIG. 1 or 2. FIG.

In the figure, 1 is a polishing plate having a polishing surface 1a with a predetermined curvature, 2 is a shaft to which the polishing plate 1 is attached replaceably, 3 is a lens, and 4 is a polishing surface 1a of the polishing plate 1.
A lens outer periphery holding ring, 5, having a plurality of fitting holes 4a for the lens 3 arranged around the center, to which the surface to be polished is pressed.
is a lens pressing member that presses the back side of the surface to be polished of the lens 3 fitted into the fitting hole 4a of the outer circumferential holding ring 4;
Reference numeral 6 denotes a pressure transmission member that simultaneously presses the back side of the lens pressing member 5 of each lens 3, that is, the side opposite to the lens 3. Reference numeral 7 denotes a center portion on the back side of the pressure transmission member 6, that is, the center of the opposite side to the lens pressing member 5. and driven rollers 7b and 7b' which receive the outer periphery 4b of the outer periphery holding ring 4 at at least two places and hold the outer periphery holding ring 4 at a position off the center of the polishing surface 1a of the polishing plate 1. It is a supporting member.

Using such a device, as shown in the figure, the lens 3 is fitted into the fitting hole 4a of the outer circumferential retaining ring 4, the lens pressing member 5 is applied to the back side of the lens 3, and the lens pressing member 5 is further pressed against the back side. The transmission member 6 is applied, the pressing part 7a of the support member 7 is applied to the central part of the back surface, the driven rollers 7b and 7b' are brought into contact with the outer periphery 4b of the outer periphery holding ring 4, and the shaft 2 is moved to the outer periphery holding ring 4.
rotates in the direction of the arrow in FIG. 3 so that it comes into contact with the driven rollers 7b, 7b'. As a result, the outer peripheral retaining ring 4 is held in position by contacting the driven rollers 7b, 7b', and the polished surface of the lens 3 is rubbed by the polished surface 1a of the polishing plate 1. Moreover, since the tangential force exerted on the lens 3 etc. by the sliding friction increases as the distance from the center of rotation of the polishing plate 1 increases, the driven rollers 7b, 7
The outer circumferential retaining ring 4 held at b' rotates in the same direction as the rotational direction of the polishing plate 1 in the retained position, and for this reason, the plurality of lenses 3 fitted in the outer circumferential retaining ring 4 rotate. The polished surface 1a of the polishing plate 1 is uniformly worn, at least in the area where the lens 3 contacts.

Furthermore, if the abrasive liquid is supplied during polishing to the part of the polishing surface 1a of the polishing plate 1 that is not in contact with the outer periphery holding ring 4, etc., the rotation of the polishing plate 1 and the accompanying outer periphery holding By rotating the ring 4, the surface to be polished of the lens 3 is uniformly polished, so that all the lenses 3 are polished uniformly, and the polished surface 1a of the polishing plate 1 is also unevenly worn. Polishing is performed with high polishing efficiency.

In addition, so that all the lenses 3 fitted in the outer circumferential retaining ring 4 are uniformly pressed against the polishing surface of the polishing plate 1 by the supporting member 7, and the outer circumferential retaining ring 4 is rotated smoothly. As shown in the figure, the pressure transmitting member 6 presses the lens pressing member 5 via a ball 8 rotatably embedded in the center of the rear side of the lens pressing member 5, and the supporting member 7 presses the lens pressing member 7 on the rear side of the pressing member 6. Preferably, the pressure transmitting member 6 is pressed via a ball 8 rotatably embedded in the center.
However, the relationship between the support member 7 and the pressure transmission member 6 is the same even if the ball 8 is embedded in the support member 7 side, and the relationship between the pressure transmission member 6 and the lens pressing member 5 is also the same in that respect. Further, the configuration in which the pressing force is transmitted via the ball 8 as described above is as follows.
This is particularly important in the relationship between the support member 7 and the pressure transmission member 6, and the relationship between the pressure transmission member 6 and the lens pressing member 5 is important.
This relationship is not so important because there is little need to rotate the lens 3.

Although the present invention has been described above with respect to the case where the polishing plate 1 is rotated, the present invention is not limited thereto. Of course, the same result can be obtained even if the retaining ring 4 is rotated relative to the polishing plate 1 in the direction opposite to the arrow shown in FIG. The rotation of the support member 7 and the above-mentioned rotation of the support member 7 may be combined. Of course, even if the lens 3 and the polishing plate 1 are pressed by the support member 7, the polishing plate 1
The polishing direction 1a of the polishing plate 1 is not limited to the upward direction shown in the figure. Further, the outer periphery 4b of the outer periphery holding ring 4, which is in contact with the driven rollers 7b, 7b' of the support member 7, is attached to the polishing plate 1 as shown in the figure.
If the tapered surface is configured to expand in the direction of the polishing surface 1a of the polishing plate 1, a component force acts on the outer circumferential holding ring 4 in the direction in which it presses against the polishing plate 1, and the outer circumferential holding ring 4 also presses against the polishing surface 1a of the polishing plate 1. As a result, even if the outer circumference of the lens 3 is thin and is biased toward the polishing surface 1a of the polishing plate 1, the outer circumference of the lens 3 can be reliably held by the outer circumference holding ring 4. Furthermore, the outer peripheral retaining ring 4 always wraps the polishing surface 1a of the polishing plate 1 to maintain a predetermined curvature.

[Brief explanation of the drawing]

1 and 2 are side views showing an example of the embodiment of the present invention, and FIG. 3 is a partial plan view of FIG. 1 or 2. FIG. 1... Polishing plate, 1a... Polishing surface, 2... Shaft, 3
... Lens, 4 ... Outer periphery holding ring, 4a ... Lens fitting hole, 4b ... Outer periphery, 5 ... Lens pressing member,
6... Pressure transmission member, 7... Supporting member, 7a...
Pressing portion, 7b, 7b'...driven roller, 8...ball.

Claims (1)

[Claims] 1. A polishing plate having a polishing surface of a predetermined curvature, a lens outer periphery holding ring having a plurality of lens insertion holes arranged around the center, the surface to be polished being pressed against the polishing surface of the polishing plate, and the outer periphery holding ring. a lens pressing member that presses the back side of the lens fitted into the insertion hole; a pressure transmission member that simultaneously presses the back sides of a plurality of lens pressing members; a pressing portion that presses the center portion of the back side of the pressure transmission member; The polishing plate or the support member is manufactured by using a support member that has driven rollers that respectively receive the outer circumference of the outer circumference holding ring at at least two places and holds the outer circumference holding ring at a position away from the center of the polishing surface of the polishing plate. A lens polishing method comprising: polishing a lens fitted into a fitting hole of the outer periphery retaining ring by rotating at least one of the lenses around the center of the polishing surface.