JPS5978818A - Manufacture of toric contact lens and lens processing chuck thereof - Google Patents
Manufacture of toric contact lens and lens processing chuck thereofInfo
- Publication number
- JPS5978818A JPS5978818A JP18985582A JP18985582A JPS5978818A JP S5978818 A JPS5978818 A JP S5978818A JP 18985582 A JP18985582 A JP 18985582A JP 18985582 A JP18985582 A JP 18985582A JP S5978818 A JPS5978818 A JP S5978818A
- Authority
- JP
- Japan
- Prior art keywords
- lens material
- lens
- ring
- chuck
- toric
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/00009—Production of simple or compound lenses
- B29D11/00019—Production of simple or compound lenses with non-spherical faces, e.g. toric faces
Abstract
Description
【発明の詳細な説明】
本発明は、乱視矯正用のトーリックコンタクトレンズの
製造法と、この製造法において使用するレンズ加工用の
チャックに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a toric contact lens for correcting astigmatism, and a chuck for processing the lens used in this manufacturing method.
従来のトーリックコンタクトレンズの製造法ハ、第１図
に示すように、荒削シしたレンズ素材（１）の周縁に連
設したフランジ（２）の等間隔位置の１個所にそれぞれ
軸芯方向に沿った外力Ｐを加え、一対の向い合った位置
の外力と他の一対の向い合った位置の外力の向きを逆に
して、レンズ素材を彎曲し、レンズ素材面を彎曲した状
態で球面に切削して研磨し、外力を除去してレンズ素材
を復元し、レンズ素材面の球面を円環面即ちトーリック
面にする。ところが、この従来法においては、第１に、
レンズ素材を大きく彎曲することが困難であるので、直
交する２方向の曲率半径の差が大きい即ち乱視矯正力の
大きいコンタクトレンズを得ることが困難である。また
、第２に、特にソフトコンタクトレンズの場合は、レン
ズ素材の復元力即ち弾性力が充分に高くないので、彎曲
用の外力を除去してレンズ素材を解放しても、レンズ素
材が完全に復元しないで歪が残った状態になシ、所望の
ト−リツク面が得られず、乱視矯正力の大きいコンタク
トレンズを得ることが困難である。The conventional manufacturing method for toric contact lenses is as shown in Fig. 1, in which the flange (2) is connected to the periphery of the rough-cut lens material (1), and each of the flanges (2) is placed at one position at equal intervals in the axial direction. Apply an external force P along the curve, reverse the direction of the external force at one pair of facing positions and the external force at another pair of facing positions, curve the lens material, and cut the lens material surface into a spherical surface in the curved state. The lens material is then polished and the external force is removed to restore the lens material, making the spherical surface of the lens material a toric surface. However, in this conventional method, firstly,
Since it is difficult to curve the lens material to a large extent, it is difficult to obtain a contact lens with a large difference in the radius of curvature in two orthogonal directions, that is, with a large astigmatism correcting power. Secondly, especially in the case of soft contact lenses, the restoring force, or elasticity, of the lens material is not sufficiently high, so even if the external force for bending is removed and the lens material is released, the lens material will not completely deform. If the distortion remains without restoration, the desired toric surface cannot be obtained and it is difficult to obtain a contact lens with a large astigmatism correcting power.
本発明の目的は、上記のような従来法の欠点を除去し、
所望の大きい乱視矯正力を有するコンタクトレンズを得
ることのできるトーリックコンタクトレンズの製造法を
提供することである。The purpose of the present invention is to eliminate the drawbacks of the conventional method as described above,
It is an object of the present invention to provide a method for manufacturing a toric contact lens, which makes it possible to obtain a contact lens having a desired large astigmatism correcting power.
また、本発明の他の目的は、上記の本発明の製造法にお
いて使用するトーリックコンタクトレンズ加工用のチャ
ックを提供することである。Another object of the present invention is to provide a chuck for processing toric contact lenses, which is used in the above manufacturing method of the present invention.
本発明者は、先ず、前記の従来法の第１欠点は、外力の
加え方に起因していることからして、レンズ素材を大き
く彎曲させる外力の加え方について考察したところ、第
２図に示すように、レンズ素材（３）の向い合った２個
所の周縁に径方向に沿った中・ｕ向きの外力Ｐを加えて
、レンズ素材（３）を座屈を生じさせるように彎曲させ
ると、大きく彎曲することに気付いだのである。また、
前記の従来法の第２欠点は、レンズ素材の弾性力が充分
に高くないことに起因しているが、レンズ素材の材質は
、製品のコンタクトレンズの特性から制限され、自由に
選択することができない。しかし、レンズ素材の周縁の
フランジは、製品のコンタクトレンズが完成する前にレ
ンズ素材から切除され、レンズ素材の材質と同一である
必要がない。そこで、レンズ素材に、それと同質のフリ
ンジを連設する代シに、弾性力が充分に高いリングを嵌
着して、そのリングの弾性力によってレンズ素材を彎曲
状態から復元させることを考え出したのである。Considering that the first drawback of the above-mentioned conventional method is due to the way in which external force is applied, the present inventor first considered how to apply external force to cause the lens material to curve significantly, and as shown in Fig. 2. As shown, when an external force P is applied along the radial direction in the middle/u direction to two opposing peripheral edges of the lens material (3), the lens material (3) is bent so as to cause buckling. , I noticed that it curved a lot. Also,
The second drawback of the conventional method is that the elastic force of the lens material is not high enough, but the material of the lens material is limited by the characteristics of the contact lens product and cannot be freely selected. Can not. However, the peripheral flange of the lens material is removed from the lens material before the product contact lens is completed, and does not need to be the same material as the lens material. Therefore, we came up with the idea of attaching a ring with sufficiently high elasticity to the lens material, instead of connecting a fringe of the same quality, and using the elastic force of the ring to restore the lens material from its curved state. be.
即ち、本発明は、レンズ素材にそれより弾性力の高いリ
ングを嵌着し、リングをその向い合った２個所の外周か
ら圧縮してレンズ素材を彎曲し、レンズ素材の内面又は
外面を彎曲した状態で球面に切削して研磨し、リングの
圧縮力を除去してレンズ素材を復元し、レンズ素材の内
面又は外面の球面をトーリック面にすることを特徴とす
るトーリックコンタクトレンズの製造法である。That is, in the present invention, a ring having higher elasticity is fitted onto a lens material, and the ring is compressed from two opposing outer peripheries to curve the lens material, thereby curving the inner or outer surface of the lens material. This is a method for manufacturing toric contact lenses, which is characterized by cutting and polishing the lens material into a spherical surface while the lens material is in a spherical state, removing the compressive force of the ring, restoring the lens material, and making the inner or outer spherical surface of the lens material a toric surface. .
この製造法においては、レンズ素材に嵌着したリングを
圧縮してレンズ素材をその径方向の力によって彎曲させ
るので、大きく彎曲させることができ、しかも、リング
の弾性力がレンズ素材のそれニジ高いので、大きく彎曲
したレンズ素材を充分に復元させることができる。従っ
て、所望の大きい乱視矯正力を有するトーリックコンタ
クトレンズを得ることができる。In this manufacturing method, the ring fitted onto the lens material is compressed and the lens material is bent by the force in the radial direction, so it is possible to make a large bend, and the elastic force of the ring is higher than that of the lens material. Therefore, it is possible to sufficiently restore a lens material that is greatly curved. Therefore, a toric contact lens having a desired large astigmatism correcting power can be obtained.
また、本発明は、基盤に２本の向い合った爪を突設し、
両爪の先端内側にレンズ素材のリングを嵌込む段部を設
け、両爪の外周に、両段部を内側に撓ませる締付リング
を螺合したことを特徴とするトーリックコンタクトレン
ズ加工用のチャックである。Further, the present invention provides two opposing claws protruding from the base,
A tool for processing toric contact lenses characterized by having a stepped part on the inside of the tips of both claws into which a ring of lens material is fitted, and a tightening ring that bends both stepped parts inwardly screwed onto the outer periphery of both claws. It's Chuck.
このチャックは、両段部にレンズ素材のリングを嵌込み
、給付リングを締めて両段部を内側に撓ませると、レン
ズ素材のリングが両段部に当接した部分の外周から圧縮
されてレンズ素材が彎曲する。また、このチャックから
レンズ素材を取外すと、リングの圧縮力が消滅してレン
ズ素材が解放される。従って、このチャックは本発明の
製造法において使用される。With this chuck, when a ring of lens material is fitted into both steps and the supply ring is tightened to bend both steps inward, the ring of lens material is compressed from the outer periphery of the part where it contacts both steps. The lens material is curved. Furthermore, when the lens material is removed from this chuck, the compressive force of the ring disappears and the lens material is released. This chuck is therefore used in the manufacturing method of the invention.
次に、本発明の実施例について説明する。Next, examples of the present invention will be described.
第１実施例（第３図乃至第１ｔＩ図参照） ５−
内面トーリックコンタクトレンズの製造法本例の製造法
は、第３図と第１図に示すように、円板形状に形成した
２−ヒドロキシエチルメタクリレートを主成分とする親
水性のレンズ素材（３）の外周面の一板面側に、円環形
状に形成したメチルメタアクリレート製のリング（４）
を嵌合して接若し、レンズ素材（３）のリング（４）嵌
着側の板面を凹曲面（５）に、他の板面を凸曲面（６）
にそれぞれ荒切削して、第Ｓ図に示すように、レンズ素
材（３）を周縁にリング（４）を嵌着した球殻状に形成
する。このレンズ素材（３）は、第を図に示すように、
レンズ旋盤の主軸のチャック（７）に凹曲面（５）を外
側にして同軸芯に取付け、主軸のチャック（７）を回転
する一方、レンズ旋盤の切削工具（８）を、チャック（
７）と同軸芯に回転するレンズ素材の凹曲面（５）に当
接して、レンズ素材（３）の回転軸上に中心を有する円
弧状に回動し、レンズ素材の凹曲面（５）を所望の曲率
半径の球面に切削する。そして、レンズ素材（３）は、
第７図に示すように、レンズ研磨盤のレンズ保持具（９
）に凹曲面（５）を外側にして取付け、レンズ素材の凹
曲面（５） ６−
にその曲率半径と合致した径の球状研磨治具０１を研磨
剤を介在して当接し、球状研磨治具０１を回転する一方
、レンズ保持具（９）に取付けたレンズ素材（３）を球
状研磨治具ＯＩの球面に沿って揺動して、レンズ素材の
凹曲面（５）を研磨する。次に、このレンズ素材（３）
は、第ｇ図と第７図に示すように、特別のトーリックチ
ャック０Ｄに取付け、レンズ素材のリング（４）をその
向い合った２個所の外周から圧縮してレンズ素材（３）
を彎曲する。1st Example (See Figures 3 to 1tI) 5-Method of Manufacturing an Inner Toric Contact Lens The manufacturing method of this example is as shown in Figures 3 and 1. A ring made of methyl methacrylate (4) formed in an annular shape on one side of the outer peripheral surface of the hydrophilic lens material (3) whose main component is hydroxyethyl methacrylate.
The ring (4) of the lens material (3) is fitted with a concave curved surface (5), and the other plate surface is a convex curved surface (6).
Each lens material (3) is roughly cut to form a spherical shell shape with a ring (4) fitted around the periphery, as shown in Fig. S. This lens material (3) is as shown in the figure.
Mount the lens lathe's main shaft chuck (7) on the coaxial core with the concave curved surface (5) on the outside, and while rotating the main shaft chuck (7), the lens lathe's cutting tool (8) is attached to the chuck (
7), the concave curved surface (5) of the lens material rotates in an arc whose center is on the rotation axis of the lens material (3), and the concave curved surface (5) of the lens material rotates. Cut into a spherical surface with the desired radius of curvature. And the lens material (3) is
As shown in Figure 7, the lens holder (9
) with the concave curved surface (5) on the outside, and a spherical polishing jig 01 with a diameter matching the radius of curvature of the concave curved surface (5) 6- of the lens material is brought into contact with an abrasive interposed therebetween. While the tool 01 is rotated, the lens material (3) attached to the lens holder (9) is swung along the spherical surface of the spherical polishing jig OI to polish the concave curved surface (5) of the lens material. Next, this lens material (3)
As shown in Fig. g and Fig. 7, the lens material (3) is attached to a special toric chuck 0D, and the lens material ring (4) is compressed from the outer periphery of two opposite places.
to curve.
上記のトーリックチャック０１）は、第ｇ図と第り図に
示すように、円盤状の基盤０２に２本の向い合った爪（
１：１ 、 Ｑ３を突設し、両爪ｔ１４ 、 （１１の
先端内側に段部（１４） 、 （１４）を形成し、両爪
（１：ｌ 、 ｎ；、ｉの外周に締付リングＯＱを螺合
し、両爪０３．０３の外周面と給付リング（ＩＦＱの内
周面の先端部を先細の円錐面に形成し、締付リング０均
を爪０１の基端側に螺進して締めると、両段部（１４）
、θ→が内側に撓み、締付リングＱ〜を逆方向に螺進
して緩めると、両段部ａ→、０りが原位置に復元するよ
うに装置し、締付リング（１９の外周に抜止リング０り
を螺合している。このチャックＱηにおいては、両段部
α４）、（］→にレンズ素材のリング（４）を凹曲面（
５）を外側にして嵌込み、締付リング（ＩＦＱを締めて
、両段部０４． （１４）を内側に撓ませ、レンズ素材
のリング（４）を圧縮してレンズ素材（３）を彎曲し、
レンズ素材の彎曲した凹曲面（５）の曲率半径を図示し
ない測定器で読取りながら締付りングＱｆ９の締付量を
加減して、レンズ素材（３）の情曲量を所望の値にする
。The above-mentioned toric chuck 01) has two opposing claws (
1: 1, Q3 is provided protrudingly, steps (14), (14) are formed on the inside of the tips of both claws t14, (11), and a tightening ring is attached to the outer periphery of both claws (1:l, n;, i). Screw OQ together, form the outer peripheral surface of both claws 03. When tightened, both steps (14)
, θ→ bends inward, and when the tightening ring Q~ is screwed in the opposite direction and loosened, both steps a→, 0 return to their original positions. A retaining ring (4) is screwed into the chuck Qη.The ring (4) of the lens material is attached to the concave curved surface (
5) on the outside, tighten the tightening ring (IFQ), bend both steps 04. (14) inward, compress the lens material ring (4), and bend the lens material (3). death,
Adjust the amount of tightening of the tightening ring Qf9 while reading the radius of curvature of the curved concave surface (5) of the lens material with a measuring device (not shown) to set the amount of curve of the lens material (3) to a desired value. .
トーリックチャック０１）に取付けられて彎曲したレン
ズ素材（３）は、第１０図に示すように、そのままの状
態で、再び、レンズ旋盤の主軸のチャック（７）に取付
け、チャック（７）を回転する一方、切削工具（８）を
レンズ素材の凹曲面（５）に当接して円弧状に回動し、
彎曲したレンズ素材の凹曲面（５）を前回と同じ曲率半
径の球面に切削する。そして、レンズ素材（３）は、第
１／図に示すように、トーリックチャックＱυに取付け
られて彎曲したままの状態で、再び、レンズ研磨盤に仕
掛け、凹曲面（５）にその曲率半径と合致した径の球状
研磨治具ｏｏを研磨剤を介在して当接し、球状研磨治具
００を回転する一方、トーリックチャックαηに取付け
たレンズ素材（３）を球状研磨治具ＯＩの球面に沿って
揺動して、レンズ素材の凹曲面（５）を研磨する。この
ように凹曲面（５）の機械加工を終えたレンズ素材（３
）は、トーリックチャック０ηから取外し、レンズ素材
のリング（４）を圧縮する力を除去して、彎曲していた
レンズ素材（３）をそれより弾性力の高い変形していた
リング（４）と共に復元し、レンズ素材の凹曲面（５）
即ち内面の球面を所望のトーリック面にする。The curved lens material (3) attached to the toric chuck 01) is again attached to the chuck (7) on the main shaft of the lens lathe, as shown in Figure 10, and the chuck (7) is rotated. Meanwhile, the cutting tool (8) is brought into contact with the concave curved surface (5) of the lens material and rotated in an arc,
The concave curved surface (5) of the curved lens material is cut into a spherical surface with the same radius of curvature as the previous one. Then, as shown in Figure 1, the lens material (3) is attached to the toric chuck Qυ and kept curved, and then placed on the lens polishing machine again, and the concave curved surface (5) has its radius of curvature. A spherical polishing jig 00 with a matching diameter is brought into contact with an abrasive interposed therebetween, and while the spherical polishing jig 00 is rotated, the lens material (3) attached to the toric chuck αη is moved along the spherical surface of the spherical polishing jig OI. to polish the concave curved surface (5) of the lens material. In this way, the lens material (3) after machining of the concave curved surface (5)
) is removed from the toric chuck 0η, the force that compresses the lens material ring (4) is removed, and the curved lens material (3) is removed together with the deformed ring (4), which has a higher elastic force. Restored concave curved surface of lens material (5)
That is, the inner spherical surface is made into a desired toric surface.
次に、内面（５）をトーリック面にしたレンズ素材（３
）は、第１２図に示すように、凸曲面（６）を外側にし
て偏芯チャックαηに取付け、偏芯チャックａηをレン
ズ旋盤の主軸０印に取付けて、主軸（至）を回転する一
方、レンズ旋盤の切削工具０Ｉを、主軸（至）の回転軸
の回りに振れ回るレンズ素材の凸曲面（６）に当接して
、主軸０杓の回転軸上・に中心を有する円弧状に回動し
、レンズ素材の凸曲面（６）を切削する。そして、偏芯
チャックαηに取付けられたレンズ素材（３）は、第７
３図に示すように、そのままの状態でレンズ研磨盤の主
軸（イ）に取付け、レンズ素材の凸 ９−
曲面（６）にレンズ研磨盤の研磨治具２１）の凹曲面を
研磨剤を介在して当接し、レンズ素材（３）を偏芯チャ
ックαηによって取付けた主軸（イ）を回転する一方、
研磨治具（ハ）をレンズ素材の凸曲面（６）に沿って揺
動して、レンズ素材の凸曲面（６）を研磨する。このよ
うに凸曲面（６）即ち外面の機械加工を終えたレンズ素
材（３）は、偏芯チャックａηから取外し、第１Ｕ図に
示すように、レンズ旋盤の主軸のチャック（イ）に凸曲
面（６）を外側にして同軸芯に取付け、チャック（イ）
を回転する一方、レンズ旋盤の切削工具（ハ）をレンズ
素材（３）の周辺部に当接して軸芯方向に沿って直進さ
せ、リング（４）からレンズ素材（３）を所望の径に切
取る。その後は、レンズ素材（３）の周辺部を加工する
工程等を経て、プリズムパワストタイプのソフト内面ト
ーリックコンタクトレンズを得る。Next, the lens material (3) whose inner surface (5) is a toric surface is prepared.
) is attached to the eccentric chuck αη with the convex curved surface (6) on the outside, and the eccentric chuck aη is attached to the main axis 0 mark of the lens lathe, and the main axis (to) is rotated. , the cutting tool 0I of the lens lathe is brought into contact with the convex curved surface (6) of the lens material that swings around the rotation axis of the main shaft (to), and rotated in an arc shape whose center is on the rotation axis of the main shaft 0. to cut the convex curved surface (6) of the lens material. The lens material (3) attached to the eccentric chuck αη is the seventh
As shown in Figure 3, attach it as it is to the main shaft (a) of the lens polishing machine, and insert an abrasive into the concave curved surface of the polishing jig 21) of the lens polishing machine on the convex curved surface (6) of the lens material. While rotating the main shaft (a) on which the lens material (3) is attached by an eccentric chuck αη,
The polishing jig (c) is oscillated along the convex curved surface (6) of the lens material to polish the convex curved surface (6) of the lens material. The lens material (3) whose convex curved surface (6), that is, the outer surface has been machined, is removed from the eccentric chuck aη, and as shown in Fig. 1U, the convex curved surface (6) is placed on the chuck (a) of the main shaft of the lens lathe. Attach it to the coaxial core with (6) on the outside, and attach it to the chuck (A).
While rotating, the cutting tool (C) of the lens lathe is brought into contact with the periphery of the lens material (3) and moved straight along the axial direction to cut the lens material (3) from the ring (4) to the desired diameter. Cut out. Thereafter, a prism power type soft inner toric contact lens is obtained through a process of processing the peripheral portion of the lens material (3).
第２実施例（第７５図乃至第２３図参照）外面トーリッ
クコンタクトレンズの製造法本例の製造法は、先ず、前
例におけるのと同様にして、メチルメタアクリレート製
のリング（４）を周縁に嵌着した球殻状の２−ヒドロキ
シェチμメ １０−
タフリレートを主成分とする親水性のレンズ素材（３）
を形成する。このレンズ素材（３）は、第１！ｒ図Ｃ示
すように、レンズ旋盤の主軸のチャック勾に凸曲面（６
）を外側にして同軸芯に取付け、チャック（イ）７を回
転する一方、レンズ旋盤の切削工具（ハ）を、チャック
匈と同軸芯に回転するレンズ素材の凸曲面（６）に当接
して、レンズ素材（３）の回転軸上に中ｊ１＞を有する
円弧状に回動し、レンズ素材の凸曲面（６）を所望の曲
率半径の球面に切削する。そして、レンズｉ材（３）は
、第７６図に示すように、レンズ研磨盤の主軸のチャッ
ク翰に凸曲面（６）を外側にして同軸芯に取付け、レン
ズ素材の凸曲面（６）にレンズ研磨盤の研磨治具（１）
の凹曲面を研磨剤を介在して当接し、チャック翰を回転
する一方、研磨治具（至）をレンズ素材の凸曲面（６）
に沿って揺動して、レンズ素材の凸曲面（６）を研磨す
る。次に、このレンズ素材（３）は、第１７図と第１ざ
図に示すように、特別の偏芯トーリックチャック６υに
取付け、レンズ素材のリング（４）をその向い合った２
個所の外周から圧縮してレンズ素材（３）を彎曲する。Second Example (See Figures 75 to 23) Method of Manufacturing External Toric Contact Lenses In the manufacturing method of this example, first, a ring (4) made of methyl methacrylate is attached to the periphery in the same manner as in the previous example. Inserted spherical shell-like 2-hydroxycemetium 10- Hydrophilic lens material whose main component is tafrylate (3)
form. This lens material (3) is the best! r As shown in Figure C, there is a convex curved surface (6
) is attached to the coaxial core with the chuck (A) facing outward, and while rotating the chuck (A) 7, the cutting tool (C) of the lens lathe is brought into contact with the convex curved surface (6) of the lens material rotating coaxially with the chuck. , the lens material (3) is rotated in an arc having a center j1> on the rotation axis, and the convex curved surface (6) of the lens material is cut into a spherical surface with a desired radius of curvature. Then, as shown in Fig. 76, the lens material I (3) is attached to the chuck handle of the main shaft of the lens polishing machine on the coaxial core with the convex curved surface (6) facing outward, and the convex curved surface (6) of the lens material Polishing jig for lens polishing machine (1)
The concave curved surface of the lens material is brought into contact with the concave curved surface (6) of the lens material and the chuck is rotated, while the polishing jig (6) is brought into contact with the convex curved surface of the lens material (6).
to polish the convex curved surface (6) of the lens material. Next, this lens material (3) is attached to a special eccentric toric chuck 6υ, as shown in Fig. 17 and Fig.
The lens material (3) is bent by compressing it from the outer periphery of the point.
上記の偏芯トーリックチャックＣ３１）は、第１７図と
第１ｇ図に示すように、円盤状の基盤（２）に２本の向
い合った爪（至）、（至）を突設し、両爪ｏ３ 、 ＆
１の先端内側に段部（ロ）、−を形成し、両段部■、（
ロ）間の中心位置を基盤６′４の軸芯位置から所望の距
離分偏芯して配置し、両爪（至）、ｃ（１の外周に締付
リング（ハ）を螺合し、両爪翰、（至）の外周面と締付
リング（至）の内周面の先端部を先細の円錐面に形成し
、給付リング（至）を爪（至）の基端側に螺進して締め
ると、両段部■、−が内側に撓み、締付リング（ハ）を
逆方向に螺進して緩めると、両段部■、Ｃ］Φが原位置
に復元するように装置し、給付リングに）の外周に抜止
リング（至）を螺合している。このチャック０υにおい
ては、両段部■、弼にレンズ素材のリング（４）を凸曲
面（６）を外側にして嵌込み、締付リング（至）を締め
て、両段部（ロ）、（財）を内側に撓ませ、レンズ素材
のリング（４）を圧縮してレンズ素材（３）を彎曲し、
レンズ素材の彎曲した凸曲面（６）の曲率半径を図示し
ない測定器で読取りながら締付リング（ハ）の締付量を
加減して、レンズ素材（３）の鞠曲量を所望の値にする
。As shown in FIG. 17 and FIG. Nail o3, &
Steps (B) and - are formed on the inside of the tip of 1, and both steps ■ and (
(b) The center position between the base plates 6' and 6'4 is eccentrically arranged by a desired distance from the axial center position of the base plate 6'4, and the tightening ring (c) is screwed onto the outer periphery of both claws (to) and c (1). The tips of the outer peripheral surface of both claws (to) and the inner circumferential surface of the tightening ring (to) are formed into tapered conical surfaces, and the delivery ring (to) is screwed toward the proximal end of the claw (to). When tightened, both steps ■ and - will bend inward, and when the tightening ring (c) is screwed in the opposite direction to loosen, both steps ■ and C]Φ will return to their original positions. A retaining ring (to) is screwed onto the outer periphery of the dispensing ring. In this chuck 0υ, insert the lens material ring (4) into both steps (■) and ``b'' with the convex curved surface (6) outside, tighten the tightening ring (to), and then tighten both steps (b) and (Foundation) inward, compressing the ring (4) of the lens material and bending the lens material (3),
While reading the radius of curvature of the curved convex surface (6) of the lens material with a measuring device (not shown), adjust the amount of tightening of the tightening ring (c) to set the amount of curvature of the lens material (3) to the desired value. do.
偏芯トーリックチャックＯＤに取付けられて彎曲したレ
ンズ素材（３）は、第１り図に示すように、そのま１の
状態で、再び、レンズ旋盤の主軸のチャック（ハ）に取
付け、レンズ素材（３）を偏芯トーリックチャック０］
）によって取付けた主軸のチャック（財）を回転する一
方、切削工具（ハ）を、チャック翰の回転軸の回シに振
れ回るレンズ素材の凸曲面（６）に当接して、チャック
翰の回転軸上に中心を有する円弧状に回動し、彎曲した
レンズ素材の凸曲面（６）を前回と同じ曲率半径の球面
に切削する。そして、レンズ素材（３）は、第２０図に
示すように、偏芯トーリックチャック０υに取付けられ
て彎曲したままの状態で、再び、レンズ研磨盤の主軸の
チャック翰に取付け、レンズ素材の凸曲面（６）に研磨
治具■の凹曲面を研磨剤を介在して当接し、チャック翰
を回転する一方、研磨治具（至）をレンズ素材の凸曲面
（６）に沿って揺動して、レンズ素材の凸曲面（６）を
研磨する。このように凸曲面（６）の機械加工を終えた
レンズ素材（３）は、偏芯トーリックチャックＣ３１］
から取外し、レンズ素材のリング（４）を圧縮するカを
除 １３ −
去して、彎曲していたレンズ素材（３）をそれより弾性
力の高い変形していたリング（４）と共に復元し、レン
ズ素材の凸曲面（６）即ち外面の球面を所望のトーリッ
ク面にする。The curved lens material (3) mounted on the eccentric toric chuck OD is again mounted on the main shaft chuck (c) of the lens lathe in the same state as shown in the first diagram, and the lens material (3) Eccentric toric chuck 0]
) rotates the chuck on the main shaft attached to it, while the cutting tool (c) comes into contact with the convex curved surface (6) of the lens material that swings around on the rotating axis of the chuck handle, thereby rotating the chuck handle. It rotates in an arc shape centered on the axis, cutting the convex curved surface (6) of the curved lens material into a spherical surface with the same radius of curvature as the previous one. Then, as shown in Fig. 20, the lens material (3) is attached to the eccentric toric chuck 0υ and remains bent, and is again attached to the chuck arm of the main shaft of the lens polishing machine, and the convexity of the lens material is The concave curved surface of the polishing jig (■) is brought into contact with the curved surface (6) via an abrasive, and the chuck holder is rotated, while the polishing jig (2) is swung along the convex curved surface (6) of the lens material. Then, the convex curved surface (6) of the lens material is polished. The lens material (3) whose convex curved surface (6) has been machined in this way is an eccentric toric chuck C31]
13-Remove the force that compresses the ring (4) of the lens material, and restore the curved lens material (3) together with the deformed ring (4), which has a higher elasticity, The convex curved surface (6) of the lens material, that is, the outer spherical surface, is made into a desired toric surface.
次に、外面（６）をトーリック面にしたレンズ素材（３
）は、第２／図に示すように、レンズ旋盤の主軸のチャ
ック（至）に凹曲面（５）を外側にして同軸芯に取付け
、チャック（至）を回転する一方、レンズ旋盤の切削工
具（至）を、チャック（至）と同軸芯に回転するレンズ
素材の凹曲面（５）に当接して、レンズ素材（３）の回
転軸上に中心を有する円弧状に回動し、レンズ素材の凹
曲面（５）を所望の曲率半径の球面に切削する。そして
、レンズ素材（３）は、第２２図に示すように、レンズ
研磨盤めレンズ保持具に）に凹曲面（５）を外側にして
取付け、レンズ素材の凹曲面（５）にその曲率半径と合
致した径の球状研磨治具１υを研磨剤を介在して当接し
、球状研磨治具０→を回転する一方、レンズ保持具（至
）に取付けたレンズ素材（３）を球状研磨治具０〃の球
面に沿って揺動して、レンズ素材の凹曲面（５）を研磨
する。このように凹曲面（５） １４−
即ち内面の機械加工を終えたレンズ素材（３）は、第２
３図に示すように、レンズ旋盤の主軸のチャック０２に
凸曲面（６）を外側にして同軸芯に取付け、チャック（
６）を回転する一方、レンズ旋盤の切削工具（１をレン
ズ素材（３）の周辺部に当接して軸芯方向に沿って直進
させ、リング（４）からレンズ素材（３）を所望の径に
切取る。その後は、レンズ素材（３）の周辺部を加工す
る工程等を経て、プリズムパラストタイプのソフト外面
トーリックコンタクトレンズを得る。Next, the lens material (3) whose outer surface (6) is a toric surface is
) is attached coaxially to the chuck (to) of the main shaft of the lens lathe with the concave curved surface (5) outward, as shown in Fig. 2, and while the chuck (to) is rotated, the cutting tool of the lens lathe is (to) is brought into contact with the concave curved surface (5) of the lens material that rotates coaxially with the chuck (to), and rotates in an arc shape having its center on the rotation axis of the lens material (3). The concave curved surface (5) is cut into a spherical surface with a desired radius of curvature. Then, as shown in Fig. 22, the lens material (3) is attached to a lens polishing plate (lens holder) with the concave curved surface (5) on the outside, and the concave curved surface (5) of the lens material is attached to its curvature radius. A spherical polishing jig 1υ with a diameter matching that of The concave curved surface (5) of the lens material is polished by swinging along the spherical surface of 0〃. In this way, the concave curved surface (5) 14- In other words, the lens material (3) whose inner surface has been machined is
As shown in Figure 3, attach the chuck 02 of the main shaft of the lens lathe to the coaxial core with the convex curved surface (6) outside, and then attach the chuck (
6), while the cutting tool (1) of the lens lathe is brought into contact with the periphery of the lens material (3) and moved straight along the axial direction, cutting the lens material (3) from the ring (4) to the desired diameter. Thereafter, a prism palast type soft outer surface toric contact lens is obtained by processing the peripheral portion of the lens material (3).
上記の両実施例においては、レンズ素材（３）に嵌着し
たリング（４）の材料は、アクリル樹脂であるが、ＡＢ
８樹脂やポリプロピレン樹脂であってもよく、要は、レ
ンズ素材ニジ弾性力即ち彎曲状態からの復元力の高い材
料であればよい。In both of the above embodiments, the material of the ring (4) fitted to the lens material (3) is acrylic resin, but AB
8 resin or polypropylene resin; in short, any material that has a high elasticity, that is, a high restoring force from a curved state, may be used as the lens material.
また、上記の第２実施例においては、偏芯トーリックチ
ャックＣ（υは、偏芯量が固足されているが、基盤を爪
側とその反対側の２枚に分割し、両者を直径方向に摺動
可能に並設して、偏芯量を可変できるようにしても工い
。In addition, in the second embodiment described above, the eccentric toric chuck C (υ) has a fixed eccentricity, but the base is divided into two pieces, one on the claw side and the other side, and both are separated in the diametrical direction. It is also possible to arrange them so that they can slide in parallel so that the amount of eccentricity can be varied.
第１図は従来の製造法におけるレンズ素材への外力の加
え方を示す斜視図であり、第２図は本発明の製造法にお
けるレンズ素材への外力の加え方を示す斜視図である。
第３図と第を図は本発明の第１実施例の製造法における
レンズ素材の縦断正面図と平面図、第５図は同レンズ素
材の荒削り状態の縦断正面図であシ、第６図乃至第１１
図は第１実施例の製造法における各工程を示す図であっ
て、第を図は内面切削工程の平面図、第７図は内面研磨
工程の正面図、第ｇ図は彎曲工程ないしトーリックチャ
ックの縦断正面図、第り図は第ｇ図のｌｌ−Ｈ線断面図
、第１０図は内面再切削工程の平面図、第１／図は内面
研磨工程の正面図、第１２図は外面切削工程の平面図、
第１３図は外面研磨工程の正面図、第１ｔＩ図は切取工
程の平面図である。第１Ｓ図乃至第一２３図は第２実施
例の製造法における各工程を示す図であって、第７５図
は外面切削工程の平面図、第１乙図は外面研磨工程の正
面図、第１７図は彎曲工程ないし偏芯トーリックチャッ
クの縦断正面図、第１ｇ図は第１７図のＸ■−）ｆｆｉ
ｌ線断面図、第１り図は外面再切削工程の平面図、第、
２０図は外面研磨工程の正面図、第２／図は内面切削工
程の平面図、第２２図は内面研磨工程の正面図、第２３
図は切取工程の平面図である。
３：レンズ素材 ４：リング
５：凹曲面、内面 ６ ：凸曲面、外面１１ニド
−リックチャック
１２：基 盤 １３：爪
１４：段 部 １５：締付リング３１：偏芯
トーリックチャック
３２：基 盤 ゛ ３３：爪
３４：段 部 ３５：締付リング １７−
第１図 第２図
第３図 第４図
第５図
第１９図
第２０図−
−Ｉ
第２１図 第２２図
（）
第２３図
ムフFIG. 1 is a perspective view showing how to apply an external force to the lens material in a conventional manufacturing method, and FIG. 2 is a perspective view showing how to apply an external force to the lens material in the manufacturing method of the present invention. 3 and 3 are a longitudinal sectional front view and a plan view of the lens material in the manufacturing method of the first embodiment of the present invention, FIG. 5 is a longitudinal sectional front view of the same lens material in a rough-cut state, and FIG. to 11th
The figures are diagrams showing each process in the manufacturing method of the first embodiment, in which figure 1 is a plan view of the inner surface cutting process, figure 7 is a front view of the inner surface polishing process, and figure g is the bending process or toric chuck. Fig. 10 is a plan view of the inner surface re-cutting process, Fig. 1/ is a front view of the inner surface polishing process, and Fig. 12 is the outer surface cutting. Floor plan of the process,
FIG. 13 is a front view of the outer surface polishing step, and FIG. 1tI is a plan view of the cutting step. Figures 1S to 123 are diagrams showing each process in the manufacturing method of the second embodiment, in which Figure 75 is a plan view of the outer surface cutting process, Figure 1B is a front view of the outer surface polishing process, and Figure 17 is a vertical sectional front view of the bending process or eccentric toric chuck, and Figure 1g is the X■-)ffi of Figure 17.
The first figure is a plan view of the outer surface re-cutting process.
Figure 20 is a front view of the external polishing process, Figure 2/ is a plan view of the internal cutting process, Figure 22 is a front view of the internal polishing process, and Figure 23 is a front view of the internal polishing process.
The figure is a plan view of the cutting process. 3: Lens material 4: Ring 5: Concave curved surface, inner surface 6: Convex curved surface, outer surface 11 Nidoric chuck 12: Base 13: Jaw 14: Step part 15: Tightening ring 31: Eccentric toric chuck 32: Base゛ 33: Claw 34: Step portion 35: Tightening ring 17- Fig. 1 Fig. 2 Fig. 3 Fig. 4 Fig. 5 Fig. 19 Fig. 20 - -I Fig. 21 Fig. 22 () Fig. 23 Muff
Claims (2)
し、リングをその向い合った２個所の外周から圧縮して
レンズ素材を彎曲し、レンズ素材の内面又は外面を彎曲
した状態で球面に切削して研磨し、リングの圧縮力を除
去してレンズ素材を復元し、レンズ素材の内面又は外面
の球面をトーリック面にすることを特徴とするトーリッ
クコンタクトレンズの製造法。(1) A ring with high elasticity is fitted onto the lens material, and the ring is compressed from two opposing outer circumferences to curve the lens material, and the inner or outer surface of the lens material is curved. A method for manufacturing a toric contact lens, which comprises cutting and polishing into a spherical surface, removing the compressive force of the ring to restore the lens material, and making the inner or outer spherical surface of the lens material a toric surface.
端内側にレンズ素材のリングを嵌込む段部を設け、両爪
の外周に、両段部を内側に撓ませる締付りングを螺合し
たことを特徴とするトーリックコンタクトレンズ加工用
のチャック。(2) Two opposing claws are provided protruding from the base, a stepped part is provided inside the tips of both claws into which a ring of lens material is fitted, and a fastener is attached to the outer periphery of both claws to bend both stepped parts inward. A chuck for processing toric contact lenses characterized by screwed attachment rings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18985582A JPS5978818A (en) | 1982-10-28 | 1982-10-28 | Manufacture of toric contact lens and lens processing chuck thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18985582A JPS5978818A (en) | 1982-10-28 | 1982-10-28 | Manufacture of toric contact lens and lens processing chuck thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5978818A true JPS5978818A (en) | 1984-05-07 |
| JPS6312742B2 JPS6312742B2 (en) | 1988-03-22 |
Family
ID=16248305
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18985582A Granted JPS5978818A (en) | 1982-10-28 | 1982-10-28 | Manufacture of toric contact lens and lens processing chuck thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5978818A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6197227B1 (en) | 1998-01-16 | 2001-03-06 | Bausch & Lomb Incorporated | Toric axis alignment machine and method |
| JP2007503336A (en) * | 2003-08-23 | 2007-02-22 | エシロール・ランテルナシオナル（カンパニー・ジェネラル・ドプティク） | Method for producing an ophthalmic lens from a circular blank |
| JP2011191798A (en) * | 2005-02-15 | 2011-09-29 | Queensland Univ Of Technology | Control of myopia using contact lens |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0581686U (en) * | 1991-06-28 | 1993-11-05 | 日特機械工業株式会社 | Cutting device for measuring sugar content of sugar cane |
| JPH0552745U (en) * | 1991-12-13 | 1993-07-13 | 株式会社フジタ | Simple sampling device |
-
1982
- 1982-10-28 JP JP18985582A patent/JPS5978818A/en active Granted
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6197227B1 (en) | 1998-01-16 | 2001-03-06 | Bausch & Lomb Incorporated | Toric axis alignment machine and method |
| JP2007503336A (en) * | 2003-08-23 | 2007-02-22 | エシロール・ランテルナシオナル（カンパニー・ジェネラル・ドプティク） | Method for producing an ophthalmic lens from a circular blank |
| JP4829790B2 (en) * | 2003-08-23 | 2011-12-07 | エシロール アンテルナシオナル （コンパニー ジェネラル ドプティック） | Method for producing an ophthalmic lens from a circular blank |
| US8685292B2 (en) | 2003-08-23 | 2014-04-01 | Essilor International (Compagnie General D'optique) | Method for manufacturing ophthalmic lenses using circular blanks |
| JP2011191798A (en) * | 2005-02-15 | 2011-09-29 | Queensland Univ Of Technology | Control of myopia using contact lens |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6312742B2 (en) | 1988-03-22 |
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