JPH0622933B2 - Plastic thin lens shaping method - Google Patents
Plastic thin lens shaping methodInfo
- Publication number
- JPH0622933B2 JPH0622933B2 JP14765390A JP14765390A JPH0622933B2 JP H0622933 B2 JPH0622933 B2 JP H0622933B2 JP 14765390 A JP14765390 A JP 14765390A JP 14765390 A JP14765390 A JP 14765390A JP H0622933 B2 JPH0622933 B2 JP H0622933B2
- Authority
- JP
- Japan
- Prior art keywords
- lens
- shaping
- plastic thin
- plastic
- thin
- 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.)
- Expired - Fee Related
Links
Landscapes
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Description
【発明の詳細な説明】 「利用分野」 本発明は、眼鏡レンズ、光学素子などに有用なプラスチ
ック薄肉レンズの整形方法に関する。TECHNICAL FIELD The present invention relates to a method for shaping a plastic thin lens useful for spectacle lenses, optical elements and the like.
「従来技術及びその問題点」 プラスチックレンズは、軽量で壊れ難く、また染色が可
能であるため、眼鏡レンズなどに広く使用されるように
なった。しかしながら、プラスチックレンズの製造工程
には、重合時に加熱される他、ハードコート膜の硬化及
び染色の際に加熱による処理工程が含まれる。この加熱
によりレンズには熱応力が加わり、特に薄肉レンズにお
いてはレンズ曲面が変形を受け、所定の曲率を達成する
ことができない。“Prior Art and Its Problems” Plastic lenses have come to be widely used for spectacle lenses and the like because they are lightweight, are not easily broken, and can be dyed. However, the manufacturing process of the plastic lens includes a heating process at the time of curing and dyeing the hard coat film in addition to the heating process at the time of polymerization. Due to this heating, thermal stress is applied to the lens, and especially in a thin lens, the curved surface of the lens is deformed and a predetermined curvature cannot be achieved.
そのため、プラスチック薄肉レンズに加熱によって生じ
た変形・歪みを解消し、所定の曲面に整形しうる方法の
開発が求められている。Therefore, there is a demand for development of a method capable of eliminating deformation / distortion caused by heating a thin plastic lens and shaping it into a predetermined curved surface.
「発明の目的」 本発明は、変形や歪みのあるプラスチック薄肉レンズか
ら変形や歪みを解消し、所定の曲面に整形しうる方法を
提供することを目的とする。"Object of the Invention" It is an object of the present invention to provide a method capable of eliminating deformation or distortion from a plastic thin lens having deformation or distortion and shaping the lens into a predetermined curved surface.
「発明の構成」 本発明によるプラスチック薄肉レンズの整形方法は、プ
ラスチック薄肉レンズを、成形時と同一の曲率を有する
型上に載せて加熱整形することを特徴とする。[Structure of the Invention] A method of shaping a plastic thin lens according to the present invention is characterized by placing the plastic thin lens on a mold having the same curvature as that at the time of molding and performing heat shaping.
本発明においては、プラスチックレンズの材質には特に
制限はなく、ジエチレングリコールビスアリルカーボネ
ート重合体、ウレタン樹脂、アクリル樹脂、スチレン樹
脂、ポリカーボネート樹脂など、様々なプラスチックか
ら成るレンズに適用することができるが、特に薄肉レン
ズに適用するのに好適である。さらに、具体的には、本
発明の方法は０．５〜１．５mmの厚みの薄肉レンズに適
用するのに好適である。In the present invention, the material of the plastic lens is not particularly limited, and can be applied to lenses made of various plastics such as diethylene glycol bisallyl carbonate polymer, urethane resin, acrylic resin, styrene resin, and polycarbonate resin. It is particularly suitable for application to thin lenses. More specifically, the method of the present invention is suitable for applying to thin lenses having a thickness of 0.5 to 1.5 mm.
また、本発明の方法は、プラスチックレンズ素地に適用
してもよいが、ハードコート膜の形成や染色を行う場合
など、加熱工程を含む場合にはその加熱によって再び変
形し、歪みが発生するおそれがあるので、加熱工程を含
む処理を行った後に、本発明の整形方法を実施するのが
好ましい。Further, the method of the present invention may be applied to a plastic lens substrate, but when a heating step is included, such as when forming or dyeing a hard coat film, it may be deformed again by heating, and distortion may occur. Therefore, it is preferable to carry out the shaping method of the present invention after performing the treatment including the heating step.
本発明においては、上記のように、熱応力によって変形
・歪みが発生したプラスチックレンズを成形時と同一の
曲率を有する型上に載せて加熱することによって整形す
る。用いる型は、成形に用いたものであってよく、その
材質はガラス、セラミックス、金属などであってよい。In the present invention, as described above, the plastic lens, which is deformed / distorted by the thermal stress, is placed on the mold having the same curvature as that at the time of molding and is heated to be shaped. The mold used may be that used for molding, and its material may be glass, ceramics, metal, or the like.
この加熱整形は８０〜１４０℃の温度で２０分〜１時間
行う。８０℃未満では、整形効果が充分ではなく、１４
０℃を超えると、レンズが黄変してしまう。また、加熱
時間が２０分以下では整形効果が不充分となり、１時間
を超えると、同様にレンズが黄変する恐れがある。This heat shaping is performed at a temperature of 80 to 140 ° C. for 20 minutes to 1 hour. Below 80 ° C, the shaping effect is not sufficient,
If the temperature exceeds 0 ° C, the lens will turn yellow. If the heating time is 20 minutes or less, the shaping effect is insufficient, and if the heating time is more than 1 hour, the lens may similarly turn yellow.
加熱整形を実施するには、８０〜１４０℃に昇温した恒
温装置内にレンズを入れ、２０分〜１時間加熱し、その
後、常温まで徐冷するのが好ましい。この徐冷は、３０
分以上かけて常温に戻るように行うのが好ましい。In order to carry out the heat shaping, it is preferable that the lens is placed in a thermostat heated to 80 to 140 ° C., heated for 20 minutes to 1 hour, and then gradually cooled to room temperature. This slow cooling is 30
It is preferable to perform it so that the temperature returns to room temperature over a period of time.
次に、図面に基づいて本発明をさらに詳しく説明する。Next, the present invention will be described in more detail with reference to the drawings.
第１図は及び第２図は本発明の実施態様を示す断面図で
ある。本発明の方法を実施するには、第３図に示したよ
うに、まず、ハードコート膜の硬化工程などによって加
熱され、変形を受けたプラスチックレンズ１ａを所望の
曲面を有するガラス型２上に置き、この状態で８０〜１
４０℃の温度範囲で加熱処理する。こうして加熱処理を
行うと、第１図に示したように、ガラス型と同じ曲面を
有する変形のないプラスチックレンズ１ｂが得られる。1 and 2 are cross-sectional views showing an embodiment of the present invention. In order to carry out the method of the present invention, as shown in FIG. 3, first, the plastic lens 1a heated and deformed by the hardening process of the hard coat film is placed on the glass mold 2 having a desired curved surface. Place, 80-1 in this state
Heat treatment is performed in the temperature range of 40 ° C. When the heat treatment is performed in this manner, as shown in FIG. 1, a plastic lens 1b having the same curved surface as the glass mold and having no deformation is obtained.
第２図は、中央部が薄いプラスチックレンズの整形を示
す実施態様である。このような中央部の薄いプラスチッ
クレンズにおいては、加熱処理によって大きい変形を生
じ、そのままでは使用できないが、本発明の方法により
ガラス型４上に重ねて加熱整形することにより、変形・
歪みのないプラスチックレンズ３が得られる。FIG. 2 is an embodiment showing shaping of a plastic lens having a thin central portion. Such a thin plastic lens in the central portion is largely deformed by heat treatment and cannot be used as it is. However, when the plastic lens is overlapped on the glass mold 4 by the method of the present invention and is heat-shaped, it is deformed.
A distortion-free plastic lens 3 is obtained.
「発明の実施例」 次に、実施例に基づいて本発明をさらに詳しく説明する
が、本発明はこれに限定されるものではない。"Examples of the Invention" Next, the present invention will be described in more detail based on examples, but the present invention is not limited thereto.
実施例１ プラスチック薄肉レンズで、凸面側が次式 〔式中、Ｎはレンズ材質の屈折率を示し、Ｒはレンズの
曲率半径を示す〕で表される面屈折力値が５．４５ジオ
プトリの球面であって、中心厚みが１mm、直径が８０mm
であるレンズに、シリコン系ハードコート液をディップ
コート法でレンズの両面に約２μｍの厚さに塗布するこ
とによりハードコート薄膜を付け、１２０℃の恒温槽に
入れて硬化させた。硬化後、レンズの凸面側の上記面屈
折力を測定したが、硬化による熱変形を受け、第１表に
示すように２方向で面屈折力の差が生じた。Example 1 A thin plastic lens, the convex side of which is expressed by the following formula. [Where N is the refractive index of the lens material and R is the radius of curvature of the lens] is a spherical surface having a surface power of 5.45 diopters and a center thickness of 1 mm and a diameter of 80 mm.
A hard coat thin film was attached to each lens by applying a silicon-based hard coat solution to both sides of the lens by a dip coating method to a thickness of about 2 μm, and the hard coat thin film was placed in a constant temperature bath at 120 ° C. to cure. After the curing, the surface refracting power on the convex surface side of the lens was measured, but it was subjected to thermal deformation due to curing, and as shown in Table 1, a difference in surface refracting power was generated in two directions.
そのため、面屈折力５．４５値を持ったガラス型上に変
形したレンズを載せ、恒温槽内で１１０℃で３０分加熱
し、その後、３０分で常温となるように徐冷を行い、整
形した。凸面側の面屈折力値を測定した結果、第２表に
示したように期待通りの値となり、変形量も許容範囲内
に収まった。 Therefore, place the deformed lens on a glass mold having a surface refractive power of 5.45, heat in a constant temperature bath at 110 ° C for 30 minutes, and then slowly cool it to room temperature in 30 minutes and shape it. did. As a result of measuring the surface refractive power value on the convex side, the value was as expected as shown in Table 2, and the amount of deformation was within the allowable range.
「発明の効果」 本発明の方法によれば、歪みのあるプラスチックレンズ
を簡単な操作で容易に整形することができ、所定の曲面
を有するレンズを得ることができる。 [Advantageous Effects] According to the method of the present invention, a plastic lens having a distortion can be easily shaped by a simple operation, and a lens having a predetermined curved surface can be obtained.
したがって、本発明の方法は、貼り合わせレンズ、中央
部が薄いレンズなど、プラスチック薄肉レンズの整形に
好適であり、レンズの度数や乱視軸を所望通りに仕上げ
ることができる。Therefore, the method of the present invention is suitable for shaping a plastic thin lens such as a cemented lens or a lens having a thin central portion, and the power and astigmatic axis of the lens can be finished as desired.
第１図は本発明の一実施態様を示す整形後のプラスチッ
クレンズの断面図、第２図は本発明の別の実施態様を示
す整形後のプラスチックレンズの断面図、第３図はガラ
ス型上に置いた整形前のプラスチックレンズの変形例を
誇張して示す断面図である。 符号の説明 １ａ、１ｂ及び３……プラスチックレンズ、２及び４…
…ガラス型1 is a sectional view of a plastic lens after shaping showing an embodiment of the present invention, FIG. 2 is a sectional view of a plastic lens after shaping showing another embodiment of the present invention, and FIG. 3 is a glass mold. FIG. 9 is a cross-sectional view exaggeratingly showing a modified example of the plastic lens before shaping placed in FIG. Explanation of reference numerals 1a, 1b and 3 ... Plastic lens, 2 and 4 ...
… Glass type
Claims (6)
の曲率を有する型上に載せて加熱整形することを特徴と
するプラスチック薄肉レンズの整形方法。1. A method of shaping a plastic thin-walled lens, which comprises placing a plastic thin-walled lens on a mold having the same curvature as that at the time of molding and performing heat shaping.
時間行う請求項１記載のプラスチック薄肉レンズの整形
方法。2. Heating at a temperature of 80 to 140 ° C. for 20 minutes to 1
The method for shaping a plastic thin lens according to claim 1, which is performed for a time.
１記載のプラスチック薄肉レンズの整形方法。3. The method of shaping a plastic thin lens according to claim 1, wherein the mold used for molding is used as the mold.
記載のプラスチック薄肉レンズの整形方法。4. The lens is a cemented lens.
A method for shaping the plastic thin lens described.
１記載のプラスチック薄肉レンズの整形方法。5. The method for shaping a plastic thin lens according to claim 1, wherein the lens is a lens having a thin central portion.
囲にある請求項１記載のプラスチック薄肉レンズの整形
方法。6. The method of shaping a plastic thin lens according to claim 1, wherein the thickness of the thin lens is in the range of 0.5 to 1.5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14765390A JPH0622933B2 (en) | 1990-06-06 | 1990-06-06 | Plastic thin lens shaping method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14765390A JPH0622933B2 (en) | 1990-06-06 | 1990-06-06 | Plastic thin lens shaping method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0441229A JPH0441229A (en) | 1992-02-12 |
| JPH0622933B2 true JPH0622933B2 (en) | 1994-03-30 |
Family
ID=15435218
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14765390A Expired - Fee Related JPH0622933B2 (en) | 1990-06-06 | 1990-06-06 | Plastic thin lens shaping method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0622933B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2909573B2 (en) * | 1992-04-27 | 1999-06-23 | 株式会社アサヒオプティカル | Method for producing thermosetting resin lens for spectacles and shaping support used in the method |
-
1990
- 1990-06-06 JP JP14765390A patent/JPH0622933B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0441229A (en) | 1992-02-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5219497A (en) | Method for manufacturing lenses using thin coatings | |
| US4190621A (en) | Method for molding optical plastic lenses of the standard and bifocal type | |
| US5512371A (en) | Composite lenses | |
| US4208364A (en) | Process for the production of contact lenses | |
| US20150231839A1 (en) | Lenses with graded photochromic, molds and methods of making same | |
| WO2020078691A1 (en) | Optical articles comprising encapsulated microlenses and methods of making the same | |
| WO2019124354A1 (en) | Production method for spectacle lens molding mold and production method for spectacle lens | |
| WO2019124353A1 (en) | Production method for spectacle lens molding mold and production method for spectacle lens | |
| JPWO2019124352A1 (en) | Eyeglass lens manufacturing method and eyeglass lens | |
| JP2000506794A (en) | Optical lens preform | |
| US5067800A (en) | Composite optical article and method of manufacture thereof | |
| JPH0534509A (en) | Aspherical optical element and production thereof | |
| JPH0622933B2 (en) | Plastic thin lens shaping method | |
| JPH09113852A (en) | Plastic lens for high-refractive index spectacles | |
| JP3034950B2 (en) | Method of manufacturing high quality plastic lenses for eyeglasses | |
| JPH01171932A (en) | Manufacture of aspherical lens | |
| JP3810456B2 (en) | Mold for eyeglass lenses | |
| JP2002292759A (en) | Method for manufacturing plastic lens | |
| JPH0572562B2 (en) | ||
| JP2661449B2 (en) | Manufacturing method of aspherical molded lens | |
| CN118251302A (en) | Method for producing an optical article having a microstructure, microstructured optical article and use thereof for myopia control and/or prevention | |
| JPH10180893A (en) | Plastic lens and its manufacture and apparatus therefor | |
| JPS61132313A (en) | Manufacture of lens for spectacles | |
| JP5748597B2 (en) | Manufacturing method of plastic lens | |
| JPS62297119A (en) | Molding tool of contact lens |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |