JPH05245767A - Polishing attachment - Google Patents
Polishing attachmentInfo
- Publication number
- JPH05245767A JPH05245767A JP4534392A JP4534392A JPH05245767A JP H05245767 A JPH05245767 A JP H05245767A JP 4534392 A JP4534392 A JP 4534392A JP 4534392 A JP4534392 A JP 4534392A JP H05245767 A JPH05245767 A JP H05245767A
- Authority
- JP
- Japan
- Prior art keywords
- polishing
- lens
- polisher
- processed
- attachment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
- Polishing Bodies And Polishing Tools (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、光学レンズ、光学レン
ズ成形用金型及び光学ミラーの最終仕上げ研磨用の研磨
装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polishing apparatus for final finishing polishing of an optical lens, an optical lens molding die and an optical mirror.
【０００２】[0002]
【従来の技術】従来、光学レンズ（特に非球面レンズ）
の最終仕上げ研磨加工は、図４に示すように、被加工レ
ンズ１１の被加工面に研磨工具１３の発泡ポリウレタン
等で構成されている研磨布（以下ポリシャーと称す）１
２を弾性機軸によって押し当てて、酸化セリウム等の研
磨砥粒を供給させながら回転運動させることによって行
われていた。2. Description of the Related Art Conventionally, optical lenses (especially aspherical lenses)
As shown in FIG. 4, the final finishing polishing of the polishing tool 1 is a polishing cloth (hereinafter referred to as a polisher) 1 made of foamed polyurethane or the like of the polishing tool 13 on the surface to be processed of the lens 11 to be processed.
2 was pressed by an elastic machine shaft, and was rotated by supplying polishing abrasive grains such as cerium oxide.
【０００３】[0003]
【発明が解決しようとする課題】上記のような研磨砥粒
を用いた研磨加工では加工量は経験的に、ポリシャーと
被加工レンズの接触圧力、ポリシャーと被加工レンズの
相対運動速度及び加工時間に比例すると考えられてい
る。In the polishing process using the abrasive grains as described above, the processing amount is empirically determined such that the contact pressure between the polisher and the lens to be processed, the relative movement speed of the polisher and the lens to be processed, and the processing time. It is believed to be proportional to.
【０００４】高精度なレンズを加工するために一度光学
的鏡面に磨き上げたレンズを形状測定をして形状誤差の
発生している箇所を修正する場合、従来の研磨方法で
は、図５に示しているような研磨パターンとなるため
に、図５のような誤差形状をねらい通りに修正加工する
ことができない。そのためレンズの高精度化が非常に難
しいものとなっていた。In order to process a lens with high precision, when the shape of a lens once polished to an optical mirror surface is measured to correct a portion where a shape error occurs, the conventional polishing method is shown in FIG. Since such a polishing pattern is formed, the error shape as shown in FIG. 5 cannot be corrected and processed as intended. Therefore, it has been extremely difficult to improve the precision of the lens.
【０００５】そこで、本発明はレンズの形状誤差発生箇
所をねらい通りに加工して、高精度のレンズ加工を実現
できる研磨装置を提供することを目的とする。Therefore, it is an object of the present invention to provide a polishing apparatus capable of accurately processing a lens shape error generation portion to realize highly accurate lens processing.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するため
に本発明の研磨装置は、内圧を有した弾性体の表面にポ
リシャーを取付けた研磨工具において、そのポリシャー
を研磨工具の回転中心と異なる位置に配置させてなるも
のである。To achieve the above object, the polishing apparatus of the present invention is a polishing tool in which a polisher is attached to the surface of an elastic body having an internal pressure, and the polisher is different from the rotation center of the polishing tool. It is arranged in a position.
【０００７】[0007]
【作用】この構成により、研磨工具のポリシャーは一定
圧力の状態で被加工レンズに加圧される。また、ポリシ
ャーが弾性体の上に偏心させて配置されているため、ポ
リシャーを図３のごとく回転させれば研磨工具の回転と
被加工レンズの回転から生じる研磨パターンは、ポリシ
ャーが偏心して配置されていない図５のパターンに対し
て、図２のごとくなる。With this structure, the polisher of the polishing tool is pressed against the lens to be processed at a constant pressure. Further, since the polisher is eccentrically arranged on the elastic body, if the polisher is rotated as shown in FIG. 3, the polishing pattern caused by the rotation of the polishing tool and the rotation of the lens to be processed is eccentrically arranged. As for the pattern of FIG.
【０００８】その結果、レンズ加工の高精度化が可能と
なる。As a result, it is possible to improve the accuracy of lens processing.
【０００９】[0009]
【実施例】以下、本発明の実施例を図を参照しながら説
明する。１は加工される被加工レンズであり、ある回転
軸を中心に回転する。４は研磨工具であり、工具中心を
回転軸として回転する機構を構えている。また研磨工具
４は被加工レンズ１の任意の位置においてレンズ面の法
線方向に位置決めする機構も合わせて構えさせている。
３は弾性体であり、研磨工具４の内部に流体を入れるこ
とにより被加工レンズ１の方向へ変形している。弾性体
３の表面には発泡ポリウレタン等で構成されたポリシャ
ー２が研磨工具４の回転軸からずれた位置、すなわち偏
心して取付られている。したがって研磨工具内の流体の
圧力を０．１〜５kgf／cm2に設定すれば被加工レンズ１
はポリシャー２より同圧力で加圧される。この状態で、
研磨工具４を２０〜１０００rpm、被加工レンズ１を
０．１〜２００rpmで回転させ、研磨砥粒として酸化セ
リウム，酸化ジルコニウム等を市水に１〜２０％に混合
させて供給することにより、加工時間を管理して加工量
を制御する。以上より、図２の研磨パターンが得られ、
被加工レンズ１を高精度に修正することができ、形状精
度０．５μｍ以下の球面および非球面レンズが製作でき
る。Embodiments of the present invention will be described below with reference to the drawings. Reference numeral 1 is a lens to be processed, which rotates about a certain rotation axis. A polishing tool 4 has a mechanism that rotates about the tool center as a rotation axis. The polishing tool 4 also has a mechanism for positioning the lens 1 at an arbitrary position in the direction normal to the lens surface.
An elastic body 3 is deformed in the direction of the lens 1 to be processed by inserting a fluid into the polishing tool 4. On the surface of the elastic body 3, a polisher 2 made of polyurethane foam or the like is attached at a position deviated from the rotation axis of the polishing tool 4, that is, eccentric. Therefore, if the fluid pressure in the polishing tool is set to 0.1 to 5 kgf / cm 2 , the lens to be processed 1
Is pressurized from the polisher 2 at the same pressure. In this state,
Processing is performed by rotating the polishing tool 4 at 20 to 1000 rpm and the lens 1 to be processed at 0.1 to 200 rpm, and supplying cerium oxide, zirconium oxide, etc. as polishing abrasive grains to city water in a mixture of 1 to 20%. Controls the amount of processing by managing the time. From the above, the polishing pattern of FIG. 2 is obtained,
The lens 1 to be processed can be corrected with high accuracy, and spherical and aspherical lenses having a shape accuracy of 0.5 μm or less can be manufactured.
【００１０】[0010]
【発明の効果】本発明の研磨装置によれば、以上のよう
に偏心して取り付けたポリシャーを内圧を有した弾性体
により一定加圧で被加工レンズに押し付けて回転し、被
加工レンズも回転させることにより、修正したい形状誤
差を高精度に修正することが可能となり、高精度な球
面，非球面レンズ，ミラーを加工することができる。According to the polishing apparatus of the present invention, the polisher eccentrically attached as described above is pressed against the lens to be processed by the elastic body having an internal pressure with a constant pressure to rotate, and the lens to be processed is also rotated. As a result, the shape error to be corrected can be corrected with high accuracy, and high-precision spherical, aspherical lens and mirror can be processed.
【図１】本発明の一実施例における研磨装置の断面図FIG. 1 is a sectional view of a polishing apparatus according to an embodiment of the present invention.
【図２】同装置を用いて得られる加工形状を示す図FIG. 2 is a view showing a processed shape obtained by using the same device.
【図３】同装置を用いた場合のポリシャー運動の概念図FIG. 3 is a conceptual diagram of polisher movement when the apparatus is used.
【図４】従来の研磨装置の断面図FIG. 4 is a sectional view of a conventional polishing apparatus.
【図５】同装置を用いて研磨した場合の加工形状を示す
図FIG. 5 is a view showing a processed shape when polishing is performed using the same device.
１ 被加工レンズ ２ ポリシャー ３ 弾性体 1 Worked lens 2 Polisher 3 Elastic body
Claims (1)
付けた研磨工具において、その研磨布を研磨工具の回転
中心と異なる位置に配置させてなる研磨装置。1. A polishing apparatus in which a polishing cloth is attached to the surface of an elastic body having an internal pressure, and the polishing cloth is arranged at a position different from the center of rotation of the polishing tool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4534392A JPH05245767A (en) | 1992-03-03 | 1992-03-03 | Polishing attachment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4534392A JPH05245767A (en) | 1992-03-03 | 1992-03-03 | Polishing attachment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05245767A true JPH05245767A (en) | 1993-09-24 |
Family
ID=12716644
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4534392A Pending JPH05245767A (en) | 1992-03-03 | 1992-03-03 | Polishing attachment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05245767A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6527632B1 (en) | 1999-12-01 | 2003-03-04 | Gerber Coburn Optical, Inc. | Lap having a layer conformable to curvatures of optical surfaces on lenses and a method for finishing optical surfaces |
-
1992
- 1992-03-03 JP JP4534392A patent/JPH05245767A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6527632B1 (en) | 1999-12-01 | 2003-03-04 | Gerber Coburn Optical, Inc. | Lap having a layer conformable to curvatures of optical surfaces on lenses and a method for finishing optical surfaces |
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