JP2709622B2 - Lens processing method and lens bonding apparatus used therefor - Google Patents

Description

The present invention relates to a method of processing a lens and a lens bonding apparatus used for the method, and particularly to centering of processing of one side and the opposite side of a lens. The present invention relates to the method and apparatus for performing the method accurately.

(Prior art) For lens processing, a jig is bonded to one side, this jig is supported by a chuck or the like of a processing device, and the opposite surface is processed. When the opposite surface is processed, the jig is removed from the lens. The jig was removed and another jig was adhered to the opposite surface of the lens to process the one surface. When the jig is first adhered to the lens, it is sufficient that the jig is kept within the processing allowance of the lens material, so that very high-precision adhesion is not required. However, when a jig is adhered to the opposite surface after supporting the one surface as described above and the opposite surface is processed, it is necessary to accurately perform centering including the center position and the angle of the two. They were adhered as shown in FIG. That is, the reference portion 12a of the lens 12 after finishing the opposite surface (the upper surface in FIG. 3) is fitted into the hole 11 of the base 10 and can be moved up and down on the same axis as the hole 11 by a chuck (not shown) or the like. Was pressed against the processed upper surface of the lens 12 and bonded with an adhesive.

(Problems to be Solved by the Invention) However, since there is a gap between the hole 11 and the reference portion 12a of the lens 12, it is inevitable that slight misalignment occurs. In FIG. 3, if foreign matter such as lens processing powder enters between the lower surface of the reference portion 12a and the step portion of the hole 11 that supports the reference portion 12a, or if the above-mentioned adhesive is attached, the bonding angle is reduced. An error occurs. Therefore, conventionally, it has been necessary to extremely clean the reference portion 12a by performing ultrasonic cleaning or the like before bonding, and also to keep the hole 11 clean, so that poor centering was likely to occur.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-described problems and to provide a lens processing method capable of performing simple and accurate centering, and a lens bonding apparatus used therefor.

[Configuration of the invention]

In order to achieve the above object, a method for processing a lens according to the present invention comprises bonding a jig to one surface of a lens, supporting the jig, processing the opposite surface of the lens, and bonding the jig to the opposite surface. In the lens processing method for processing one surface, a first axial jig having a known outer diameter is bonded to one surface of the lens, and the other surface is processed. Set the jig on the first V-groove, and use the second
The axial jig is set on the second V-groove paired with the first V-groove so as to be located on the same axis as the first axial jig, and the second axial jig is bonded to the opposite surface of the lens After that, the first axial jig is detached from one side of the lens, and this one side is processed.

An apparatus for bonding the second axial jig to the lens includes first and second V-grooves for supporting the first and second axial jigs having a predetermined outer diameter on the same axis so as to face each other. V with
A block and a first or second axial jig provided in the block and set in a first or second V-groove are first or second.
Holding means for holding in the 2V groove, and a second or first axial jig similarly provided in the V block and set in the second or first V groove along the second or first V groove; What consists of a pressing means which presses to a groove side is preferable.

(Operation) For example, if the first and second axial jigs have the same outer diameter, it is relatively easy to form these outer diameters equally with high precision. In this case, the first and second axial jigs can be located on the same axis by positioning the first and second V-grooves on the same straight line, but the first and second V-grooves can be located on the same straight line. In this case, high precision can be obtained relatively easily. In addition, the first and second
By appropriately setting the length of the axial jig, the support positions of the first and second axial jigs by the first and second V-grooves can be easily and accurately matched including the angles of the two jigs. be able to. It should be noted that even if the outer diameters of the first and second axial jigs are different, it is possible to match the axes of the two jigs by changing the height of the first and second V-grooves. Needless to say. Therefore, after bonding one surface of the lens to the first axial jig and processing the opposite surface, the first axial jig is set on the first V-groove without being detached, and
If the axial jig is set on the second V-groove, and preferably one is held by the holding means and the other is pressed by the pressing means, the second axial jig is bonded to the opposite surface of the lens, The centering of the second axial jig can be performed with higher precision on the opposite surface processed with the first axial jig as a reference, and the first and second axial jigs and the first and second V-axis jigs can be aligned. Since it is easy to keep the grooves clean, a highly accurate lens can be obtained.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. In FIG. 1, 12 is a lens, 13A is a first axial jig, and 13B is a second axial jig.

The left side of the lens 12 in FIG. 1 is a first axial jig.
13A, which is adhered to the right end of the second axial jig 13A and has its right surface processed by a lens processing device (not shown).
B is intended to adhere its left end to the right side surface of the lens 12. These first and second axial jigs 13
The outer diameters of A and 13B are formed to dimensions equal to high precision.

Reference numeral 20 denotes a V-block constituting the lens bonding apparatus, which is provided with a concave portion 21 for receiving the lens 12 on the way, and has a first V-shaped groove 22 and a second V-shaped groove.
23 are provided on the same straight line. A stopper 24 for closing the left end of the first V groove 22 is provided at the left end of the V block 20 in FIG. Also, V block 20
Is located above the first V-groove 22, as shown in FIG.
The first holding plate 26 is attached to the hinge 25 so that it can be opened and closed,
The first holding plate 26 and the stopper 24 constitute a holding means for holding the first axial jig 13A at a predetermined position in the first V groove 22.

A second holding plate 27 located above the second V groove 23 along with the first holding plate 26 is attached to the V-block 20 so as to be opened and closed by a hinge 25. The second holding plate 27 extends rightward in FIG. 1 from above the second V-groove 23, and has a projection 27a formed below the right end thereof. This projection 27a has a second V groove
A push rod 28 is mounted so as to be located on substantially the same axis as the second axial jig 13B placed on 23 and to be movable in the axial direction. The push rod 28 is provided with a biasing force in the direction toward the second axial jig 13B by a spring 29, and a knob 30 is fixed to the right end in FIG.
The push rod 28, the spring 29, and the knob 30 constitute a pressing means.

Next, the lens processing method of the present invention will be described together with the operation of the lens bonding apparatus. First, the lens 12 is bonded to the tip of the first axial jig 13A as described above. Since the bonding accuracy does not need to be very high, the bonding is performed by the conventional method shown in FIG. 3 or another appropriate method. , Lens 12
In FIG. 1, the right side surface is machined.

When the processing of the right side surface is completed, the first side shown in FIG.
The holding plate 26 is opened, and as shown in FIG.
A is placed in the first V-groove 22 and the left end thereof is brought into contact with the stopper 24. Then, the first holding plate 26 is closed, and the first axial jig 13A is held in close contact with the first V-groove 22 by the gravity.

Next, the second holding plate 27 is opened, and the second axial jig 13B with the adhesive applied to the tip is placed in the second V-groove 23 so as to face the lens 12. Next, the push rod 28 is moved by the knob 30 to the spring 29.
The second presser plate 27 is closed while pulling it against. 2nd axial jig
13B is brought into close contact with the second V-shaped groove 23 by the gravity of the second holding plate 27. Next, loosen the pulling force of the knob 30, and
The push rod 28 is gently advanced by the urging force of 29, and the second axial jig 13B is pushed toward the lens 12. As a result, the tip of the second axial jig 13B abuts on the right surface of the lens 12, and pushes the lens 12 and the first axial jig 13A to the left in FIG. Since the movement of the first axial jig 13A is regulated by the stopper 24, the first axial jig 13A is held at a predetermined position, and the second axial jig 13B is pressed on the right side of the lens 12 with a predetermined pressing force by the urging force of the spring 29. And the bonding is performed.

At this time, the first and second axial jigs 13A and 13B
And the first and second V-grooves 22, 23 by the second holding plates 26, 27.
And the second axial jig 13B is positioned on the right side of the lens 12 processed with reference to the first axial jig 13A because they are accurately positioned on the same axis. Centering is performed accurately. If these first and second axial jigs 13A, 13B are formed relatively long, it is assumed that small foreign matter enters between these jigs 13A, 13B and the V-grooves 22, 23. In addition to the size of the misalignment, the misalignment of the angle can be suppressed.

After the second axial jigs 13B are bonded and fixed to the right surface of the lens 12 in this manner, they are taken out of the V-block 20 together with the first axial jig 13A, and the first axial jig 13A is
And process the removed surface. At this time, the lens
12 is processed with reference to the second axial jig 13B which is more accurately centered with respect to the right surface in FIG. 1 previously processed, so that the inclination of the left and right surfaces of the lens 12 is The misalignment including (angle) is suppressed to be smaller.

In the above-described embodiment, the first
As the holding means for the shaft jig 13A, the stopper 24 and the first
Although the holding plate 26 is shown, it is not limited to this, and other holding means such as a tightening screw can be used.
As means for pressing the axial jig 13B against the first axial jig 13A along the second V groove 23, a second holding plate 27, a push rod 28, a spring 29
And the knob 30 is shown. However, the present invention is not limited to this, and various modifications may be made such that the second axial jig 13B may be brought into close contact with the second V-groove 23 by a spring force and pressed with a tightening screw. Is possible, and the first and second axial jigs 13A,
It goes without saying that the set of 13B may be reversed left and right in FIG.

〔The invention's effect〕

As described above, according to the lens processing method of the present invention,
The centering accuracy of mounting the jig with respect to one of the processed surfaces of the lens can be easily increased, and thereby the center misalignment of both surfaces of the lens can be kept extremely small, and a high-precision lens can be obtained. Further, according to the lens bonding apparatus of the present invention, more accurate bonding can be performed by a simple operation.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing one embodiment of a lens bonding apparatus used in the lens processing method of the present invention, and FIG. 2 is a II-II of FIG.
FIG. 3 is a schematic view showing a conventional bonding method. 12 ... Lens, 13 ... Jig, 13A ... First axial jig, 13B ... Second
Axial jig, 20… V block, 22… First V groove, 23… Second V groove,
24,26 ... holding means, 27,28,29,30 ... pressing means.

Claims (2)

(57) [Claims] 1. A lens processing method in which a jig is bonded to one side of a lens, the jig is supported and the opposite side of the lens is processed, and then a jig is bonded to the opposite side and the one side is processed. In the above, after attaching a first axial jig having a known outer diameter to one surface of the lens and processing the opposite surface, the jig is set on the first V groove while the first axial jig is adhered. A second axial jig also having a known outer diameter is set on a second V groove paired with the first V groove so as to be located on the same axis as the first axial jig,
After bonding the second axial jig to the opposite surface of the lens,
A method of processing a lens, comprising: detaching the first axial jig from one surface of the lens and processing the one surface. 2. A V-block having first and second V-grooves for supporting first and second axial jigs having a predetermined outer diameter on the same axis so as to face each other, and provided on the V-block. Holding means for holding the first or second axial jig set in the first or second V-groove in the first or second V-groove; and holding means for the second or first V-groove similarly provided in the V-block. 2. A lens used in the lens processing method according to claim 1, further comprising pressing means for pressing the set second or first axial jig along the second or first V groove toward the first or second V groove. Bonding equipment.