JP3428062B2 - Plastic lens manufacturing method - Google Patents
Plastic lens manufacturing methodInfo
- Publication number
- JP3428062B2 JP3428062B2 JP08654693A JP8654693A JP3428062B2 JP 3428062 B2 JP3428062 B2 JP 3428062B2 JP 08654693 A JP08654693 A JP 08654693A JP 8654693 A JP8654693 A JP 8654693A JP 3428062 B2 JP3428062 B2 JP 3428062B2
- Authority
- JP
- Japan
- Prior art keywords
- lens
- plastic
- convex surface
- peripheral portion
- spectacle lens
- 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 - Lifetime
Links
Landscapes
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Eyeglasses (AREA)
- Surface Treatment Of Optical Elements (AREA)
- Treatments Of Macromolecular Shaped Articles (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、プラスチック製レンズ
の製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a plastic lens.
【０００２】[0002]
【従来の技術】プラスチック製眼鏡レンズの製造方法
は、熱硬化性樹脂の場合、注型重合により原料を硬化さ
せ、離型を行い生地プラスチックレンズを得る。さらに
プラスチック製眼鏡レンズの表面硬度の向上、蒸着膜と
の密着性向上、染色性の安定化等の機能を付与させるた
め、ハードコート加工を行う。眼鏡レンズへのさらなる
機能の付加として反射防止加工を施す。これらの表面処
理加工は、プラスチックレンズの性能、機能を向上させ
るため一般的に行われている。2. Description of the Related Art In the method of manufacturing a plastic spectacle lens, in the case of a thermosetting resin, a raw material is cured by cast polymerization and released to obtain a cloth plastic lens. Further, a hard coat process is performed in order to impart functions such as improvement of surface hardness of the plastic spectacle lens, improvement of adhesion to a vapor deposition film, and stabilization of dyeability. Anti-reflection processing is added as an additional function to the spectacle lens. These surface treatments are generally performed to improve the performance and function of plastic lenses.
【０００３】前記製造工程の中で、品質の向上、安定し
た歩留まり確保等の目的で随時加熱処理が必要になって
いる。具体的には、レンズ内の未反応モノマーの硬化、
熱硬化性樹脂の重合度の向上、レンズ内部の歪をとる、
レンズ表面の改質、洗浄を行う、レンズに塗布したハー
ドコート膜の硬化、ハードコート上に蒸着膜を形成する
際の前処理、等がある。これらの加熱処理は、製造工程
の中で必要不可欠となっており、その加熱方法には、
熱、紫外線、赤外線、電子線、またはマイクロ波、等が
利用されている。例えば、ハードコート膜を形成する場
合には、ハードコート液を塗布し、該コーティング膜が
硬化する温度まで加熱する必要がある。この硬化温度
が、プラスチック製眼鏡レンズの原料固有のガラス転移
点より低い場合には何ら問題は無いが、逆に硬化温度の
方が高い場合にハードコート膜を形成しようとするとプ
ラスチック製眼鏡レンズは、熱により変形してしまう。
よってプラスチック製眼鏡レンズの原料固有のガラス転
移点を昇温可能限界としているが、これは各々の原料に
左右されている。In the above manufacturing process, heat treatment is required at any time for the purpose of improving quality and ensuring a stable yield. Specifically, the curing of unreacted monomer in the lens,
Improving the degree of polymerization of thermosetting resin, removing distortion inside the lens,
There are reforming and cleaning of the lens surface, curing of the hard coat film applied to the lens, pretreatment for forming a vapor deposition film on the hard coat, and the like. These heat treatments are indispensable in the manufacturing process, and the heating method is
Heat, ultraviolet rays, infrared rays, electron beams, or microwaves are used. For example, when forming a hard coat film, it is necessary to apply a hard coat liquid and heat it to a temperature at which the coating film is cured. If this curing temperature is lower than the glass transition point peculiar to the raw material of the plastic spectacle lens, there is no problem, but if the curing temperature is higher, the plastic spectacle lens is , Will be deformed by heat.
Therefore, the glass transition point peculiar to the raw material of the plastic spectacle lens is set as the limit of temperature rise, which depends on each raw material.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、前述の
様な昇温可能限界は、原料固有のガラス転移点に左右さ
れる。このプラスチック原料のガラス転移点が、従来の
技術で必要としていた加熱温度より低い原料が開発され
たため、従来の技術で加熱処理する場合、次のような問
題点を有する。However, the above-mentioned temperature limit that can be raised depends on the glass transition point peculiar to the raw material. Since a raw material having a glass transition point of the plastic raw material lower than the heating temperature required by the conventional technique has been developed, the heat treatment by the conventional technique has the following problems.
【０００５】プラスチック製眼鏡レンズを、ガラス転移
点以上の温度で加熱処理した場合、熱変形を生じ、レン
ズ両面カーブの曲率半径が設計値と異なり歪んだレンズ
となってしまう。逆にガラス転移点までしか加熱処理し
ない場合には、加熱処理する本来の目的を満たさない。When a plastic spectacle lens is heat-treated at a temperature higher than the glass transition point, thermal deformation occurs, and the radius of curvature of the lens double-sided curve becomes distorted unlike the designed value. On the contrary, when the heat treatment is performed only up to the glass transition point, the original purpose of the heat treatment is not satisfied.
【０００６】そこで本発明は、このような問題点を解決
し、熱変形せず、所望の設計値を満足するプラスチック
製眼鏡レンズの製造方法を提供する事を目的とする。Therefore, an object of the present invention is to solve the above problems and to provide a method for manufacturing a plastic spectacle lens which does not undergo thermal deformation and satisfies a desired design value.
【０００７】[0007]
【課題を解決するための手段】本発明のプラスチックレ
ンズ製造方法は、プラスチック製の眼鏡用レンズを加熱
処理する際に、該眼鏡用レンズの凸面を下向きにして、
レンズ最外周部の水平面を点または線によって支持す
る。その方法として、レンズ最外周部をリング状の支持
部材で支持する。または、レンズ最外周部を爪状の支持
部材で、３点から多点を支持する。According to the method of manufacturing a plastic lens of the present invention, when heat-treating a plastic eyeglass lens, the convex surface of the eyeglass lens is directed downward,
The outermost peripheral surface of the lens is supported by dots or lines. As the method, the outermost peripheral portion of the lens is supported by a ring-shaped support member. Alternatively, the outermost peripheral portion of the lens is supported by a nail-shaped support member to support multiple points from three points.
【０００８】[0008]
【作用】本発明は、プラスチック製眼鏡レンズの製造工
程において、レンズ原料固有の昇温可能限界以上に加熱
処理する場合、凸面を下向きにしレンズ最外周部の水平
面を点または線によって支持する事で、レンズ水平面を
支持している事と、プラスチック製レンズ自体の応力に
よりレンズを変形させる事無く処理が可能となる。According to the present invention, in the manufacturing process of a plastic spectacle lens, when the heat treatment is carried out at a temperature higher than the temperature rise limit peculiar to the lens raw material, the convex surface is directed downward and the horizontal surface of the outermost peripheral portion of the lens is supported by dots or lines. The processing can be performed without supporting the lens horizontal surface and without deforming the lens due to the stress of the plastic lens itself.
【０００９】仮に、凸面を上向きにし、平置きで加熱処
理した場合、プラスチック製眼鏡レンズは、自重により
熱変形する。If the convex surface is directed upward and heat treatment is performed in a flat state, the plastic spectacle lens is thermally deformed by its own weight.
【００１０】また加熱処理によって１度変形したレンズ
を、凸面を下向きにし、レンズ最外周部の水平面を点ま
たは線によって支持して再加熱した場合、プラスチック
製眼鏡レンズは、変形前と同様なレンズ形状に復元す
る。When a lens deformed once by heat treatment is reheated with the convex surface facing downward and the horizontal plane at the outermost periphery of the lens supported by points or lines, the plastic spectacle lens is similar to the lens before deformation. Restore to shape.
【００１１】この方法で得られたプラスチック製眼鏡レ
ンズは、所望の設計値を満足しており、外観にも異常は
無い。The plastic spectacle lens obtained by this method satisfies the desired design values and has no abnormal appearance.
【００１２】[0012]
【実施例】以下、本発明の実施例を図面に基ずいて説明
するが、これらに限定されるものではない。Embodiments of the present invention will be described below with reference to the drawings, but the invention is not limited thereto.
【００１３】（実施例１）ガラス転移点が約７０℃であ
るプラスチック製眼鏡レンズ（セイコーエプソン（株）
製造 商品名セイコースーパーソブリン）の乱視用生地
レンズを使用し、度数、光学中心の位置、中心厚、外
径、凸面及び凹面の曲率半径を測定した。その後、図１
に示す断面図のリング状支持部材２により、レンズ１の
凸面を下向きにし最外周部を支持した。熱風循環式加熱
炉により、このレンズ及び支持部材を１２０度で１時間
加熱した。その後、加熱炉内温度を３０分間で１２０度
から３０度まで下げ、該レンズを取り出した。得られた
レンズの度数、光学中心の位置、中心厚、外径、凸面及
び凹面の曲率半径を測定したところ、各特性共に加熱処
理前後で比較して１．０％以上の変化は無かった。また
レンズの外観を蛍光灯の透過光と反射光により検査した
が異常は無かった。Example 1 A plastic spectacle lens having a glass transition point of about 70 ° C. (Seiko Epson Corporation)
The power, the position of the optical center, the central thickness, the outer diameter, and the radius of curvature of the convex surface and the concave surface were measured using a astigmatic fabric lens manufactured by Seiko Super Sovereign. Then, Figure 1
With the ring-shaped support member 2 of the sectional view shown in FIG. 1, the convex surface of the lens 1 was directed downward and the outermost peripheral portion was supported. The lens and the supporting member were heated at 120 degrees for 1 hour by a hot air circulation type heating furnace. Then, the temperature in the heating furnace was lowered from 120 degrees to 30 degrees in 30 minutes, and the lens was taken out. When the power of the obtained lens, the position of the optical center, the center thickness, the outer diameter, and the radius of curvature of the convex surface and the concave surface were measured, there was no change of 1.0% or more in each characteristic before and after the heat treatment. Moreover, the appearance of the lens was inspected by the transmitted light and the reflected light of the fluorescent lamp, but there was no abnormality.
【００１４】（実施例２）ガラス転移点が約８０℃であ
るプラスチック製眼鏡レンズ（セイコーエプソン（株）
製造 商品名セイコープラックスＩＩＧＸ）の乱視用生
地レンズを使用し、度数、光学中心の位置、中心厚、外
径、凸面及び凹面の曲率半径を測定した。その後、図１
に示す断面図のリング状支持部材２により、レンズ１の
凸面を下向きにし最外周部を支持した。熱風循環式加熱
炉により、このレンズ及び支持部材を１５０度で１時間
加熱した。その後、加熱炉内温度を３０分間で１５０度
から３０度まで下げ、該レンズを取り出した。得られた
レンズの度数、光学中心の位置、中心厚、外径、凸面及
び凹面の曲率半径を測定したところ、各特性共に加熱処
理前後で比較して１．０％以上の変化は無かった。また
レンズの外観を蛍光灯の透過光と反射光により検査した
が異常は無かった。Example 2 A plastic spectacle lens having a glass transition point of about 80 ° C. (Seiko Epson Corporation)
The power, the position of the optical center, the center thickness, the outer diameter, and the radius of curvature of the convex surface and the concave surface were measured using an astigmatism fabric lens manufactured by Seiko Plax IIGX). Then, Figure 1
By the ring-shaped support member 2 of the sectional view shown in FIG. The lens and the supporting member were heated at 150 ° C. for 1 hour by a hot air circulation type heating furnace. Then, the temperature in the heating furnace was lowered from 150 degrees to 30 degrees in 30 minutes, and the lens was taken out. When the power of the obtained lens, the position of the optical center, the center thickness, the outer diameter, and the radius of curvature of the convex surface and the concave surface were measured, there was no change of 1.0% or more in each characteristic before and after the heat treatment. Moreover, the appearance of the lens was inspected by the transmitted light and the reflected light of the fluorescent lamp, but there was no abnormality.
【００１５】（実施例３）ガラス転移点が約１００℃で
あるプラスチック製眼鏡レンズ（セイコーエプソン
（株）製造 商品名セイコーハイロードＭＸ）の乱視用
生地レンズを使用し、度数、光学中心の位置、中心厚、
外径、凸面及び凹面の曲率半径を測定した。その後、図
１に示す断面図のリング状支持部材２により、レンズ１
の凸面を下向きにし最外周部を支持した。熱風循環式加
熱炉により、このレンズ及び支持部材を１５０度で１時
間加熱した。その後、加熱炉内温度を３０分間で１５０
度から３０度まで下げ、該レンズを取り出した。得られ
たレンズの度数、光学中心の位置、中心厚、外径、凸面
及び凹面の曲率半径を測定したところ、各特性共に加熱
処理前後で比較して１．０％以上の変化は無かった。ま
たレンズの外観を蛍光灯の透過光と反射光により検査し
たが異常は無かった。(Example 3) A plastic eyeglass lens having a glass transition point of about 100 ° C. (Seiko High Road MX manufactured by Seiko Epson Corp.) was used for astigmatism, and the power and the position of the optical center were used. , Center thickness,
The outer diameter, the radius of curvature of the convex surface, and the radius of curvature of the concave surface were measured. After that, the lens 1 is removed by the ring-shaped support member 2 of the sectional view shown in FIG.
The outermost peripheral portion was supported with its convex surface facing downward. The lens and the supporting member were heated at 150 ° C. for 1 hour by a hot air circulation type heating furnace. After that, the temperature in the heating furnace is set to 150 for 30 minutes.
From 30 degrees to 30 degrees, the lens was taken out. When the power of the obtained lens, the position of the optical center, the center thickness, the outer diameter, and the radius of curvature of the convex surface and the concave surface were measured, there was no change of 1.0% or more in each characteristic before and after the heat treatment. Moreover, the appearance of the lens was inspected by the transmitted light and the reflected light of the fluorescent lamp, but there was no abnormality.
【００１６】（実施例４）ガラス転移点が約７０℃であ
るプラスチック製眼鏡レンズ（セイコーエプソン（株）
製造 商品名セイコースーパーソブリン）の乱視用生地
レンズについて、度数、光学中心の位置、中心厚、外
径、凸面及び凹面の曲率半径を測定した。その後、図２
に示す３点支持部材４により、レンズ３の凸面を下向き
にしの最外周部を支持した。熱風循環式加熱炉により、
このレンズ及び支持部材を１２０度で１時間加熱した。
その後、加熱炉内温度を３０分間で１２０度から３０度
まで下げ、該レンズを取り出した。得られたレンズの度
数、光学中心の位置、中心厚、外径、凸面及び凹面の曲
率半径を測定したところ、各特性共に加熱処理前後で比
較して１．０％以上の変化は無かった。またレンズの外
観を蛍光灯の透過光と反射光により検査したが異常は無
かった。Example 4 A plastic spectacle lens having a glass transition point of about 70 ° C. (Seiko Epson Corporation)
The power, the position of the optical center, the center thickness, the outer diameter, and the radius of curvature of the convex surface and the concave surface of the astigmatism fabric lens manufactured under the product name Seiko Super Sovereign) were measured. After that, Figure 2
The three-point support member 4 shown in FIG. 2 supported the outermost peripheral portion with the convex surface of the lens 3 facing downward. By hot air circulation type heating furnace,
The lens and the supporting member were heated at 120 degrees for 1 hour.
Then, the temperature in the heating furnace was lowered from 120 degrees to 30 degrees in 30 minutes, and the lens was taken out. When the power of the obtained lens, the position of the optical center, the center thickness, the outer diameter, and the radius of curvature of the convex surface and the concave surface were measured, there was no change of 1.0% or more in each characteristic before and after the heat treatment. Moreover, the appearance of the lens was inspected by the transmitted light and the reflected light of the fluorescent lamp, but there was no abnormality.
【００１７】（実施例５）ガラス転移点が約７０℃であ
るプラスチック製眼鏡レンズ（セイコーエプソン（株）
製造 商品名セイコースーパーソブリン）の生地レンズ
で球面度数が−２．００ディオプトリーのレンズを使用
して、まず度数、光学中心の位置、中心厚、外径、凸面
及び凹面の曲率半径を測定した。その後この生地レンズ
をアセトンで洗浄した後、図３に示すレンズ支持治具６
によりレンズ５を両側から２Ｋｇｆ／ｃｍ2 の圧力で固
定させた。その後このレンズ５及びレンズ支持治具６
を、５℃のハードコート液に３０秒間浸漬した後、１２
０ｍｍ／分の速度でレンズ５及び支持治具６をハードコ
ート液中から引き上げた。レンズ５及びレンズ支持治具
６を８０℃で２時間加熱硬化させ、レンズ５をレンズ支
持治具６から取り外し、ハードコートレンズを得た。こ
のレンズは、レンズ支持治具６の圧力で三日月状に変形
した。Example 5 A plastic spectacle lens having a glass transition point of about 70 ° C. (Seiko Epson Corporation)
First, the power, the position of the optical center, the center thickness, the outer diameter, and the radius of curvature of the convex surface and the concave surface were measured by using a cloth lens (manufactured under the trade name of Seiko Super Sovereign) and a spherical power of -2.00 diopters. Thereafter, this cloth lens is washed with acetone, and then the lens support jig 6 shown in FIG.
The lens 5 was fixed from both sides by a pressure of 2 Kgf / cm 2 . After that, the lens 5 and the lens supporting jig 6
After dipping in a hard coat solution at 5 ° C for 30 seconds,
The lens 5 and the supporting jig 6 were pulled up from the hard coat liquid at a speed of 0 mm / min. The lens 5 and the lens supporting jig 6 were heated and cured at 80 ° C. for 2 hours, and the lens 5 was removed from the lens supporting jig 6 to obtain a hard coat lens. This lens was deformed into a crescent shape by the pressure of the lens supporting jig 6.
【００１８】ここでハードコート液は次のようにして作
成した。攪拌装置を備えた反応容器中に２−エトキシエ
タノール３００ｇ、２−メトキシエタノール分散コロイ
ダルシリカ（触媒化成工業（株）製 商品名オスカル１
８３２）４７０ｇ、γ−グリシドキシプロピリメトキシ
シラン１８５ｇ、フローコントロール剤０．３ｇ、０．
０５Ｎ Ｈｃｌ ５０ｇを加え、室温で２時間攪拌しハ
ードコート液とした。The hard coat solution was prepared as follows. In a reaction vessel equipped with a stirrer, 300 g of 2-ethoxyethanol, 2-methoxyethanol-dispersed colloidal silica (Catalyst Chemical Co., Ltd., trade name Oscar 1)
832) 470 g, γ-glycidoxypropyrimethoxysilane 185 g, flow control agent 0.3 g, 0.
50 g of 05N Hcl was added, and the mixture was stirred at room temperature for 2 hours to prepare a hard coat solution.
【００１９】次に、図１に示す断面図のリング状支持部
材１により、凸面を下向きにし変形したハードコートレ
ンズの最外周部を支持した。熱風循環式加熱炉により、
このレンズ及び支持部材を１２０度で１時間加熱した。
その後、加熱炉内温度を３０分間で１２０度から３０度
まで下げ、該レンズを取り出した。得られたハードコー
トレンズは、生地レンズの形状に復元しており、度数、
光学中心の位置、中心厚、外径、凸面及び凹面の曲率半
径を測定したところ、各特性共にもとの生地レンズと比
較して１．０％以上の変化は無かった。またレンズの外
観を蛍光灯の透過光と反射光により検査したが異常は無
かった。Next, the outermost peripheral portion of the deformed hard coat lens was supported by the ring-shaped support member 1 of the sectional view shown in FIG. 1 with the convex surface facing downward. By hot air circulation type heating furnace,
The lens and the supporting member were heated at 120 degrees for 1 hour.
Then, the temperature in the heating furnace was lowered from 120 degrees to 30 degrees in 30 minutes, and the lens was taken out. The obtained hard coat lens is restored to the shape of the cloth lens, and the frequency,
When the position of the optical center, the center thickness, the outer diameter, and the radii of curvature of the convex surface and the concave surface were measured, there was no change of 1.0% or more in each characteristic compared with the original cloth lens. Moreover, the appearance of the lens was inspected by the transmitted light and the reflected light of the fluorescent lamp, but there was no abnormality.
【００２０】（比較例１）ガラス転移点が約７０℃であ
るプラスチック製眼鏡レンズ（セイコーエプソン（株）
製造 商品名セイコースーパーソブリン）の乱視用生地
レンズを使用し、度数、光学中心の位置、中心厚、外
径、凸面及び凹面の曲率半径を測定した。その後、凸面
を上向きにし、熱風循環式加熱炉により、このレンズを
１２０度で１時間加熱した。その後、加熱炉内温度を３
０分間で１２０度から３０度まで下げ、該レンズを取り
出した。得られたレンズは中心部が窪んでおり、度数、
光学中心の位置、中心厚、外径、凸面及び凹面の曲率半
径を測定したところ、度数、光学中心の位置はレンズメ
ーター（ニコン（株）製 商品名ＰＬ−２）の投影画面
上で焦点を結ばず測定できなかった。外径は１．０％以
上の変化は無かったが、凸面及び凹面の曲率半径は変化
しており、窪んだ中心部以外の面形状は、球面であった
凸面が円環面となり、円環面であった凹面が球面となっ
た。レンズの外観は、レンズ最外周部が水平となってお
り、また蛍光灯の透過光と反射光により検査したとこ
ろ、レンズ中心部で反射した蛍光灯の反射光が歪んでい
た。Comparative Example 1 A plastic spectacle lens having a glass transition point of about 70 ° C. (Seiko Epson Corporation)
The power, the position of the optical center, the central thickness, the outer diameter, and the radius of curvature of the convex surface and the concave surface were measured using a astigmatic fabric lens manufactured by Seiko Super Sovereign. Then, with the convex surface facing upward, the lens was heated at 120 degrees for 1 hour in a hot-air circulation type heating furnace. After that, increase the temperature in the heating furnace to 3
The lens was taken out after being lowered from 120 degrees to 30 degrees in 0 minutes. The obtained lens has a hollow central part,
When the position of the optical center, the center thickness, the outer diameter, and the radius of curvature of the convex surface and the concave surface were measured, the power and the position of the optical center were focused on the projection screen of the lens meter (product name PL-2 manufactured by Nikon Corporation). It could not be measured because it was not tied. The outer diameter did not change by 1.0% or more, but the radii of curvature of the convex surface and the concave surface changed, and the surface shape other than the depressed center portion was a spherical convex surface that became an annular surface. The concave surface, which was a surface, became a spherical surface. As for the appearance of the lens, the outermost peripheral portion of the lens was horizontal, and when it was inspected with the transmitted light and the reflected light of the fluorescent lamp, the reflected light of the fluorescent lamp reflected at the center of the lens was distorted.
【００２１】（比較例２）ガラス転移点が約７０℃であ
るプラスチック製眼鏡レンズ（セイコーエプソン（株）
製造 商品名セイコースーパーソブリン）の生地レンズ
で球面度数が−２．００ディオプトリーのレンズを使用
して、まず度数、光学中心の位置、中心厚、外径、凸面
及び凹面の曲率半径を測定した。その後この生地レンズ
をアセトンで洗浄した後、図３に示すレンズ支持治具６
によりレンズ５を両側から２Ｋｇｆ／ｃｍ2 の圧力で固
定させた。その後このレンズ５及びレンズ支持治具６
を、実施例５と同様にして作成した、５℃のハードコー
ト液に３０秒間浸漬した後、１２０ｍｍ／分の速度でレ
ンズ５及び支持治具６をハードコート液中から引き上げ
た。 レンズ５及びレンズ支持治具６を８０℃で２時間
加熱硬化させ、レンズ５をレンズ支持治具６から取り外
し、ハードコートレンズを得た。このレンズは、レンズ
支持治具６の圧力で三日月状に変形した。(Comparative Example 2) A plastic spectacle lens having a glass transition point of about 70 ° C. (Seiko Epson Corporation)
First, the power, the position of the optical center, the center thickness, the outer diameter, and the radius of curvature of the convex surface and the concave surface were measured by using a cloth lens (manufactured under the trade name of Seiko Super Sovereign) and a spherical power of -2.00 diopters. Thereafter, this cloth lens is washed with acetone, and then the lens support jig 6 shown in FIG.
The lens 5 was fixed from both sides by a pressure of 2 Kgf / cm 2 . After that, the lens 5 and the lens supporting jig 6
Was immersed in a hard coat solution at 5 ° C. prepared in the same manner as in Example 5 for 30 seconds, and then the lens 5 and the supporting jig 6 were pulled up from the hard coat solution at a speed of 120 mm / min. The lens 5 and the lens supporting jig 6 were heated and cured at 80 ° C. for 2 hours, and the lens 5 was removed from the lens supporting jig 6 to obtain a hard coat lens. This lens was deformed into a crescent shape by the pressure of the lens supporting jig 6.
【００２２】次に、この変形したハードコートレンズの
凸面を上向きにした。熱風循環式加熱炉により、このレ
ンズを１２０度で１時間加熱した。その後、加熱炉内温
度を３０分間で１２０度から３０度まで下げ、該レンズ
を取り出した。得られたハードコートレンズは、中心部
が窪んでおり、度数、光学中心の位置、中心厚、外径、
凸面及び凹面の曲率半径を測定したところ、度数、光学
中心の位置はレンズメーター（ニコン（株）製 商品名
ＰＬ−２）の投影画面上で焦点を結ばず測定できなかっ
た。外径はもとの生地レンズと比較して１．０％以上の
変化は無かった。また窪んだ中心部以外の凸面及び凹面
の曲率半径もは変化は無かった。また蛍光灯の透過光と
反射光により検査したところ、レンズ中心部で反射した
蛍光灯の反射光が歪んでいた。Next, the convex surface of this deformed hard coat lens was faced up. This lens was heated at 120 degrees for 1 hour by a hot air circulation type heating furnace. Then, the temperature in the heating furnace was lowered from 120 degrees to 30 degrees in 30 minutes, and the lens was taken out. The obtained hard-coated lens has a hollow central portion, and has a diopter, a position of an optical center, a central thickness, an outer diameter,
When the radii of curvature of the convex surface and the concave surface were measured, the power and the position of the optical center could not be measured without focusing on the projection screen of the lens meter (product name PL-2 manufactured by Nikon Corporation). The outer diameter did not change by more than 1.0% compared to the original cloth lens. Further, the radius of curvature of the convex surface and the concave surface other than the depressed central portion did not change. Also, when the light was transmitted and reflected from the fluorescent lamp and inspected, the reflected light of the fluorescent lamp reflected at the center of the lens was distorted.
【００２３】[0023]
【発明の効果】以上述べたように本発明によれば、プラ
スチック製眼鏡レンズの製造方法における加熱処理にお
いて、レンズ原料固有の昇温可能限界が加熱処理温度よ
り低温である場合でも、レンズを変形させる事無く処理
が可能である。また、本発明により加熱処理によって１
度変形したレンズを再加熱すれば、処理前と同様なレン
ズ形状を復元する事が可能である。そのため得られたプ
ラスチック製眼鏡レンズは、所望の設計値を満足してお
り、外観も異常は無い。つまり、いかなるプラスチック
製眼鏡レンズ原料においても加熱処理温度が左右される
ことがない。As described above, according to the present invention, in the heat treatment in the method for manufacturing a plastic spectacle lens, the lens is deformed even when the temperature rise limit peculiar to the lens raw material is lower than the heat treatment temperature. Processing is possible without causing it. Further, according to the present invention, 1
If the deformed lens is reheated, it is possible to restore the same lens shape as before treatment. Therefore, the obtained plastic spectacle lens satisfies the desired design value and has no abnormal appearance. In other words, the heat treatment temperature is not affected by any raw material for plastic spectacle lenses.
【図１】本発明のリング状支持部材の一例とレンズを示
す断面図。FIG. 1 is a cross-sectional view showing an example of a ring-shaped support member of the present invention and a lens.
【図２】本発明の３点支持部材の一例とレンズを示す上
面図。FIG. 2 is a top view showing an example of a three-point support member of the present invention and a lens.
【図３】ハードコートにレンズを浸漬させるための治具
とレンズを示す正面図。FIG. 3 is a front view showing a jig and a lens for immersing the lens in a hard coat.
１ レンズ ２ リング状支持部材 ３ レンズ ４ ３点支持部材 ５ レンズ ６ レンズ支持治具 1 lens 2 Ring-shaped support member 3 lenses 4 3-point support member 5 lenses 6 Lens support jig
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) G02C 7/02 G02C 13/00 G02B 1/10 B29D 11/00 C08J 7/00 301 B29C 71/02 ─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. 7 , DB name) G02C 7/02 G02C 13/00 G02B 1/10 B29D 11/00 C08J 7/00 301 B29C 71/02
Claims (4)
レンズのプラスチック材料のガラス転移点以上の温度で
加熱処理する際に、前記眼鏡レンズの凸面を下向きにし
て前記眼鏡レンズの下面の最外周部において支持部材で
点によって支持することを特徴とするプラスチックレン
ズの製造方法。[Claim 1 wherein said eyeglass plastic spectacle lenses
When heat treatment is performed at a temperature equal to or higher than the glass transition point of the plastic material of the lens, the convex surface of the spectacle lens faces downward, and the supporting member at the outermost peripheral portion of the lower surface of the spectacle lens serves as a point. A method of manufacturing a plastic lens, which is characterized by supporting.
の支持部材で、３点から多点により支持することを特徴
とする請求項１記載のプラスチックレンズの製造方法。2. The method for manufacturing a plastic lens according to claim 1, wherein the outermost peripheral portion of the lower surface of the spectacle lens is supported by a nail-shaped support member at three to multiple points.
製の眼鏡レンズを、前記眼鏡レンズの凸面を下向きにし
て前記眼鏡レンズの下面の最外周部において支持部材で
点によって支持しながら、前記眼鏡レンズのプラスチッ
ク材料のガラス転移点以上の温度で加熱処理して、元の
レンズ形状に復元することを特徴とするプラスチックレ
ンズの製造方法。The 3. A plastic spectacle lenses deformed by heat treatment, while supported by <br/> point in the support member at the outermost peripheral portion of the lower surface of the spectacle lens with a convex surface of the spectacle lens downwards, the Glasses for plastic lenses
A method for producing a plastic lens, which comprises heat-treating the material at a temperature not lower than the glass transition point of the material to restore the original lens shape.
の支持部材で、３点から多点により支持することを特徴
とする請求項３記載のプラスチックレンズの製造方法。 4. A claw-shaped outermost peripheral portion of the lower surface of the spectacle lens
Supporting member of 3 supports multiple points from 3 points
The method for manufacturing a plastic lens according to claim 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08654693A JP3428062B2 (en) | 1993-04-13 | 1993-04-13 | Plastic lens manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08654693A JP3428062B2 (en) | 1993-04-13 | 1993-04-13 | Plastic lens manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06300993A JPH06300993A (en) | 1994-10-28 |
| JP3428062B2 true JP3428062B2 (en) | 2003-07-22 |
Family
ID=13890009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP08654693A Expired - Lifetime JP3428062B2 (en) | 1993-04-13 | 1993-04-13 | Plastic lens manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3428062B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009014086A1 (en) * | 2007-07-25 | 2009-01-29 | Hoya Corporation | Method for producing plastic lens |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001305302A (en) * | 2000-04-20 | 2001-10-31 | Asahi Optical Co Ltd | Coating method capable of increasing film thickness and plastic lens |
-
1993
- 1993-04-13 JP JP08654693A patent/JP3428062B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009014086A1 (en) * | 2007-07-25 | 2009-01-29 | Hoya Corporation | Method for producing plastic lens |
| JP5340937B2 (en) * | 2007-07-25 | 2013-11-13 | Ｈｏｙａ株式会社 | Manufacturing method of plastic lens |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06300993A (en) | 1994-10-28 |
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