JPH0441229A - Method for shaping plastic thin-wall lens - Google Patents
Method for shaping plastic thin-wall lensInfo
- Publication number
- JPH0441229A JPH0441229A JP14765390A JP14765390A JPH0441229A JP H0441229 A JPH0441229 A JP H0441229A JP 14765390 A JP14765390 A JP 14765390A JP 14765390 A JP14765390 A JP 14765390A JP H0441229 A JPH0441229 A JP H0441229A
- Authority
- JP
- Japan
- Prior art keywords
- lens
- shaping
- plastic lens
- thin
- plastic
- 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
- 239000004033 plastic Substances 0.000 title claims abstract description 37
- 229920003023 plastic Polymers 0.000 title claims abstract description 37
- 238000007493 shaping process Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000010438 heat treatment Methods 0.000 claims abstract description 19
- 238000000465 moulding Methods 0.000 claims abstract description 6
- 239000011521 glass Substances 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 5
- 238000004383 yellowing Methods 0.000 abstract 2
- 239000002344 surface layer Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 238000004043 dyeing Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000008646 thermal stress Effects 0.000 description 2
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- SYFOAKAXGNMQAX-UHFFFAOYSA-N bis(prop-2-enyl) carbonate;2-(2-hydroxyethoxy)ethanol Chemical compound OCCOCCO.C=CCOC(=O)OCC=C SYFOAKAXGNMQAX-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000002316 cosmetic surgery Methods 0.000 description 1
- 238000003618 dip coating Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920005668 polycarbonate resin Polymers 0.000 description 1
- 239000004431 polycarbonate resin Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
Landscapes
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
Description
【発明の詳細な説明】
「利用分野Ｊ
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。DETAILED DESCRIPTION OF THE INVENTION Field of Application J The present invention relates to a method for shaping thin plastic lenses 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 are lightweight, hard to break, and can be dyed, so they have come to be widely used for eyeglass lenses and the like. However, the manufacturing process of plastic lenses includes not only heating during polymerization but also processing steps using heating during curing and dyeing of the hard coat film. This heating applies thermal stress to the lens, and especially in thin lenses, the curved surface of the lens is deformed, making it impossible to achieve a predetermined curvature.
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 need to develop a method that can eliminate the deformation and distortion caused by heating a thin plastic lens and shape 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] An object of the present invention is to provide a method that can eliminate deformation and distortion from a thin plastic lens that is deformed and distorted, and can shape 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" The method for shaping a thin plastic lens according to the present invention is characterized by heating and shaping the thin plastic lens by placing it on a mold having the same curvature as that used during molding.
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０．５〜１．５關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, there is no particular restriction on the material of the plastic lens, and the present invention 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. Furthermore, specifically, the method of the present invention is suitable for application to thin lenses having a thickness of 0.5 to 1.5 degrees.
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。Furthermore, the method of the present invention may be applied to a plastic lens base, but if it includes a heating process, such as when forming a hard coat film or dyeing, there is a risk that the heating will cause the material to deform again and cause distortion. Therefore, it is preferable to carry out the shaping method of the present invention after performing a treatment including a 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（、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, a plastic lens that has been deformed or distorted due to thermal stress is shaped by placing it on a mold having the same curvature as that used during molding and heating it. The mold used may be one used for molding (the material may be glass, ceramics, metal, etc.).
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（，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. At temperatures below 80°C, the shaping effect is not sufficient (14
If the temperature exceeds 0°C, the lens will turn yellow. Further, if the heating time is less than 20 minutes, the shaping effect will be insufficient, and if it exceeds 1 hour, the lens may similarly 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 heat shaping, it is preferable to place the lens in a constant temperature device heated to 80 to 140°C, heat it for 20 minutes to 1 hour, and then slowly cool it to room temperature. This slow cooling is 30
It is preferable to allow the temperature to return to room temperature over a period of at least a minute.
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 explained in more detail based on 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ｌｂが得られる。1 and 2 are cross-sectional views showing embodiments of the present invention. To carry out the method of the present invention, first, as shown in FIG. 3, a plastic lens 1a that has been heated and deformed by a hard coat film curing process etc. is placed on a glass mold 2 having a desired curved surface. Place it in this state and set it to 80-1
Heat treatment is performed in a temperature range of 40°C. By performing the heat treatment in this manner, as shown in FIG. 1, a plastic lens lb without deformation having the same curved surface as the glass mold 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 the shaping of a plastic lens with a thin central portion. Such a thin plastic lens in the center undergoes large deformation due to heat treatment and cannot be used as is.
A plastic lens 3 without distortion can be 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〕で表される面層折力値が５．４５ジオプトリの球面
であって、中心厚みが１０、直径が８０ｗｎであるレン
ズに、シリコン系ハードコート液をデイツプコート法で
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層折力を測定
したが、硬化による熱変形を受け、第１表に示すように
２方向で面層折力の差が生じた。Example 1 A thin plastic lens whose convex side has a surface layer refractive power value of 5.45 diopters expressed by the following formula (where N represents the refractive index of the lens material and R represents the radius of curvature of the lens). A thin hard coat film was applied to a spherical lens with a center thickness of 10 mm and a diameter of 80 wn by applying a silicone hard coat liquid to a thickness of about 2 μm on both sides of the lens using the dip coating method, and then heated at 120 °C. It was placed in a constant temperature bath and cured. After curing, the surface layer rupture power on the convex side of the lens was measured, but due to thermal deformation due to curing, a difference in surface layer rupture power occurred in two directions as shown in Table 1.
第１表
そのため、面層折力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。凸面側の面層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。Table 1: Therefore, the deformed lens was placed on a glass mold with a surface layer rupture power of 5.45, heated at 110°C for 30 minutes in a thermostatic oven, and then gradually cooled to room temperature in 30 minutes. was done and formatted. As a result of measuring the surface layer rupture strength value on the convex side, the value was as expected as shown in Table 2, and the amount of deformation was also within the allowable range.
第２表
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。It is suitable for shaping Table 2 lenses, and allows the lens power and astigmatic axis to 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
「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。
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、プラスチック薄肉特許出願人
旭光学工業株式会社FIG. 1 is a cross-sectional view of a plastic lens after shaping, showing one embodiment of the present invention. FIG. 2 is a cross-sectional view of a plastic lens after shaping, showing another embodiment of the present invention. FIG. 3 is a cross-sectional view of a plastic lens after shaping, showing one embodiment of the present invention. FIG. 3 is an exaggerated cross-sectional view of a modified example of a plastic lens placed in a plastic lens before plastic surgery. Explanation of symbols 1a, 1b and 3...Plastic lenses, 2 and 4
...Glass type "Effects of the Invention" According to the method of the present invention, a distorted plastic lens can be easily shaped with a simple operation, and a lens having a predetermined curved surface can be obtained. Therefore, the method of the present invention can be applied to plastic thin-walled lenses, such as laminated lenses and lenses with a thin center.
Asahi Optical Industry Co., Ltd.
Claims (1)
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。 ２、加熱を８０〜１４０℃の温度で２０分〜１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。 ３、型として成形に用いた型を使用する請求項１記載の
プラスチック薄肉レンズの整形方法。 ４、レンズが貼り合わせレンズである請求項１記載のプ
ラスチック薄肉レンズの整形方法。 ５、レンズが中心部が薄いレンズである請求項１記載の
プラスチック薄肉レンズの整形方法。 ６、薄肉レンズの厚みが０．５〜１．５ｍｍの範囲にあ
る請求項１記載のプラスチック薄肉レンズの整形方法。[Claims] 1. A method for shaping a thin plastic lens, which comprises heating and shaping the thin plastic lens by placing it on a mold having the same curvature as that used during molding. 2. The method for shaping a thin plastic lens according to claim 1, wherein the heating is performed at a temperature of 80 to 140°C for 20 minutes to 1 hour. 3. The method for shaping a thin plastic lens according to claim 1, wherein the mold used for molding is used as the mold. 4. The method for shaping a thin plastic lens according to claim 1, wherein the lens is a laminated lens. 5. The method for shaping a thin plastic lens according to claim 1, wherein the lens is thin at the center. 6. The method for shaping a thin plastic 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 true JPH0441229A (en) | 1992-02-12 |
| JPH0622933B2 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) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993022130A1 (en) * | 1992-04-27 | 1993-11-11 | Kabushiki Kaisha Asahi Optical | Method of correcting the shape of thermoset resin lens for spectacles and support tool for shape correction in said method |
-
1990
- 1990-06-06 JP JP14765390A patent/JPH0622933B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993022130A1 (en) * | 1992-04-27 | 1993-11-11 | Kabushiki Kaisha Asahi Optical | Method of correcting the shape of thermoset resin lens for spectacles and support tool for shape correction in said method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0622933B2 (en) | 1994-03-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6830712B1 (en) | Deformable molds and methods for their use in the manufacture of ophthalmic lenses | |
| US5219497A (en) | Method for manufacturing lenses using thin coatings | |
| US20150231839A1 (en) | Lenses with graded photochromic, molds and methods of making same | |
| KR20040024542A (en) | Shape memory polymer or alloy ophthalmic lens mold and methods of forming ophthalmic products | |
| IE46344B1 (en) | Improved method and apparatus for moulding ophthalmic plastic lenses of the standard and bifocal type | |
| WO2019124354A1 (en) | Production method for spectacle lens molding mold and production method for spectacle lens | |
| JPH01106003A (en) | Lens element and manufacture thereof | |
| US5346523A (en) | Method of molding chalcogenide glass lenses | |
| US20060131768A1 (en) | Lens molding die and a producing method therefor | |
| US5067800A (en) | Composite optical article and method of manufacture thereof | |
| JP2000506794A (en) | Optical lens preform | |
| JPH0441229A (en) | Method for shaping plastic thin-wall lens | |
| US5358672A (en) | Method for removing finished articles from glass, plastic or metallic molds | |
| JPS63134211A (en) | Monolithic-molding polymer composite material | |
| JPS6226289B2 (en) | ||
| JP3191447B2 (en) | Method of manufacturing resin-bonded aspheric lens | |
| US20060274259A1 (en) | Lens for sunglasses, method for producing the same, and production apparatus therefor | |
| JPH07108622A (en) | Manufacture of plastic lens | |
| JP3034950B2 (en) | Method of manufacturing high quality plastic lenses for eyeglasses | |
| JP2002292759A (en) | Method for manufacturing plastic lens | |
| JP3810456B2 (en) | Mold for eyeglass lenses | |
| JPS5939526A (en) | Production of plastic lens | |
| JPS62292636A (en) | Molding method for glass lens | |
| JPH05330832A (en) | Method for molding calchogenide glass lens | |
| JPH10180893A (en) | Plastic lens and its manufacture and apparatus therefor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |