JPH035703A - Lens manufacturing method - Google Patents
Lens manufacturing methodInfo
- Publication number
- JPH035703A JPH035703A JP13903189A JP13903189A JPH035703A JP H035703 A JPH035703 A JP H035703A JP 13903189 A JP13903189 A JP 13903189A JP 13903189 A JP13903189 A JP 13903189A JP H035703 A JPH035703 A JP H035703A
- Authority
- JP
- Japan
- Prior art keywords
- lens
- blank
- glass
- metal
- manufacturing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B11/00—Pressing molten glass or performed glass reheated to equivalent low viscosity without blowing
- C03B11/06—Construction of plunger or mould
- C03B11/08—Construction of plunger or mould for making solid articles, e.g. lenses
- C03B11/084—Construction of plunger or mould for making solid articles, e.g. lenses material composition or material properties of press dies therefor
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2215/00—Press-moulding glass
- C03B2215/02—Press-mould materials
- C03B2215/05—Press-mould die materials
- C03B2215/06—Metals or alloys
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、例えばカラー陰極線管の露光方式螢光面形成
工程で必要な露光用レンズなど、非球面で、関数により
曲面を定義できないレンズの製造に好適なレンズ製造方
法に関する。Detailed Description of the Invention [Field of Industrial Application] The present invention is applicable to lenses that have an aspherical surface and whose curved surface cannot be defined by a function, such as an exposure lens necessary in the exposure method fluorescent surface forming process of a color cathode ray tube. The present invention relates to a lens manufacturing method suitable for manufacturing.
［従来の技術］
従来から、カラー陰極線管の露光方式螢光面形成工程で
使用する補正レンズなど、非球面レンズを製造する際に
、所要のレンズ曲面を容易に実現するために、通常の、
融点が特に低くない金属で金型（サグ型）を作成し、こ
の型の上にレンズの材料となるガラスブランク材を置き
、成形炉中に挿入し、ここでレンズ材料であるガラスブ
ランクの軟化点よりも高い温度で例えば数時間程度放置
することにより、前記サグ型の曲面をブランク材のサグ
型に接する側の面に転写し、その後、他の側の面を平面
研磨してレンズとする製造方法が採られていた。なお、
レンズの製造方法については例えば特公昭４７−４０９
８３号等に開示されている。[Prior Art] Conventionally, when manufacturing an aspherical lens such as a correction lens used in the exposure method fluorescent surface forming process of a color cathode ray tube, in order to easily realize a desired lens curved surface, a conventional method has been used.
A mold (sag mold) is made of a metal that does not have a particularly low melting point, and a glass blank material, which will be the lens material, is placed on top of this mold and inserted into a molding furnace, where the glass blank material, which is the lens material, is softened. The curved surface of the sag shape is transferred to the surface of the blank material on the side that is in contact with the sag shape by leaving it at a temperature higher than that for several hours, and then the surface on the other side is polished to form a lens. manufacturing method was used. In addition,
Regarding the manufacturing method of lenses, for example, Japanese Patent Publication No. 47-409
It is disclosed in No. 83, etc.
［発明が解決しようとする課題］
しかし、上記従来の方法では、ガラスのサグ型に対向す
る面が、ガラスの自重により、サグ型の上に垂れ下がる
ようにしていたので、サグ型の曲面の曲率が強くなると
、型とガラス材との摩擦。[Problems to be Solved by the Invention] However, in the above conventional method, the surface of the glass facing the sag shape hangs down on the sag shape due to the glass's own weight, so the curvature of the curved surface of the sag shape When the force increases, friction between the mold and the glass material increases.
ガラス粘度などの影響により、所望のレンズ曲面の再現
性、成形精度が低下するという問題が生じていた。There has been a problem in that the reproducibility of the desired lens curved surface and the molding accuracy are reduced due to the effects of glass viscosity and the like.
本発明は上記従来の技術の問題点を解決し、成形時にお
けるガラス材料の型への密着性を向上させ、再現性を向
上するレンズ製造方法を提供することを目的とする。SUMMARY OF THE INVENTION An object of the present invention is to provide a lens manufacturing method that solves the problems of the conventional techniques described above, improves the adhesion of a glass material to a mold during molding, and improves reproducibility.
［課題を解決するための手段］
上記目的を達成するために本発明においては、融点がレ
ンズ材料の軟化点よりも低い金属または合金をレンズブ
ランクの上に載せて、成形炉中でレンズ材料の軟化点以
上の温度に加熱し、溶融した金属に、其の重量により、
軟化したレンズブランクを型に押しつけさせて、レンズ
面を殆ど型の通りに成形するようにした。[Means for Solving the Problems] In order to achieve the above object, in the present invention, a metal or alloy whose melting point is lower than the softening point of the lens material is placed on a lens blank, and the lens material is heated in a forming furnace. By heating the molten metal to a temperature above its softening point, depending on its weight,
The softened lens blank was pressed against a mold so that the lens surface was molded almost exactly as the mold.
また実際には、融点がレンズ材料の軟化点よりも低い金
属または合金として、鉛、又は鉛合金を用いることにし
た。Furthermore, actually, it was decided to use lead or a lead alloy as the metal or alloy whose melting point is lower than the softening point of the lens material.
［作用］
上記のようにすれば、ガラスブランクには溶融した金属
により均一な圧力が加わる。しかも此の圧力は任意の大
きさにすることが出来る。そのためにガラス材料のサグ
型への密着性が高まり、レンズ面の曲面の精度、再現性
が向上する。溶融する金属として鉛を使用すれば、比重
が特に大きく、ガラスブランクに大きな圧力をかけるこ
とができ、また加熱中にガラス材料中へ酸化鉛が僅かに
拡散したとしても、元来ガラス材料の一種として用いら
れているものであって問題はない。[Function] By doing the above, a uniform pressure is applied to the glass blank by the molten metal. Furthermore, this pressure can be set to any desired level. This improves the adhesion of the glass material to the sag shape, improving the precision and reproducibility of the curved lens surface. If lead is used as the metal to be melted, it has a particularly high specific gravity, and a large pressure can be applied to the glass blank.Also, even if lead oxide diffuses slightly into the glass material during heating, it will still be a type of glass material. There is no problem as it is used as a.
［実施例］
以下１本発明の一実施例を第１図により説明する。第１
図は各部材の配置を示す断面図で、図中、１はサグ型、
２はガラスブランク、３は枠、４は枠の中にいれた鉛、
５はおもりである。おもり５は枠３の下端をガラスブラ
ンク２の上面に密着させ、溶融した鉛４が枠３とブラン
ク２との接触部の隙間から流出しないようにするための
ものである。第１図に示すように各成形用具や生態ニガ
ラス板材を組合せたものを加熱形成炉中に挿入すると、
釦が溶融し、その大きな比重に由来する大きな力で軟化
したガラス材料に均一な圧力を加える。[Example] An example of the present invention will be described below with reference to FIG. 1st
The figure is a sectional view showing the arrangement of each member. In the figure, 1 is a sag type,
2 is a glass blank, 3 is a frame, 4 is lead in a frame,
5 is a weight. The weight 5 is used to bring the lower end of the frame 3 into close contact with the upper surface of the glass blank 2, and to prevent molten lead 4 from flowing out from the gap between the contact portion of the frame 3 and the blank 2. As shown in Figure 1, when the combination of forming tools and ecological glass plates is inserted into the heating forming furnace,
The button melts and applies uniform pressure to the softened glass material with a large force derived from its large specific gravity.
このように従来に比べて大きな圧力を加えることによっ
て、レンズの再現性、精度を向上させることができる。By applying a larger pressure than in the past, it is possible to improve the reproducibility and precision of the lens.
なお、従来はレンズ面を成形後、ガラス材料のレンズ面
と反対の側を平面研磨してレンズにしていたが１本発明
によれば、諸条件を適切にすることにより、ガラス材料
の溶融金属に押される側の面も、レンズ面の成形と同時
に水平面にすることができる。従ってレンズブランクの
大きさが適当であれば、従来の平面研磨加工を省略する
ことも可能である。Conventionally, after molding the lens surface, the opposite side of the glass material was polished to make a lens, but according to the present invention, by optimizing various conditions, the molten metal of the glass material can be polished. The surface that is pressed can also be made into a horizontal surface at the same time as the lens surface is formed. Therefore, if the size of the lens blank is appropriate, the conventional surface polishing process can be omitted.
［発明の効果］
以上説明したように本発明によれば、従来よりも曲率の
強い、高低差の大きいレンズ面を持ったレンズを、所望
の如く、高い精度で、再現性良く。[Effects of the Invention] As explained above, according to the present invention, a lens having a lens surface with a stronger curvature and a larger height difference than the conventional one can be manufactured with high precision and good reproducibility as desired.
安価に製造できる。Can be manufactured cheaply.
第１図は本発明一実施例の説明図である。 １・・・サグ型、 ２・・・ガラスブランク。 ４・・・鉛、 ５・・・おもり。 ３・・・枠、 FIG. 1 is an explanatory diagram of one embodiment of the present invention. 1... Sag type, 2... Glass blank. 4...Lead, 5...Weight. 3...Frame,
Claims (1)
ンズ材料の軟化点よりも低い金属または合金をレンズブ
ランクの上に載せて、成形炉中でレンズ材料の軟化点以
上の温度に加熱し、溶融した金属に、其の重量によって
、軟化したレンズブランクを型に押しつけさせてレンズ
面を成形するようにしたことを特徴とするレンズ製造方
法。 ２、請求項１記載のレンズ製造方法において、融点がレ
ンズ材料の軟化点よりも低い金属または合金として、鉛
、又は鉛合金を用いることを特徴とするレンズ製造方法
。[Claims] 1. In the lens manufacturing method using the sag method, a metal or alloy whose melting point is lower than the softening point of the lens material is placed on a lens blank, and the metal or alloy whose melting point is lower than the softening point of the lens material is placed on the lens blank, and the metal or alloy whose melting point is lower than the softening point of the lens material is placed on top of the lens blank. A method for manufacturing a lens, characterized in that a lens blank heated to a temperature and molten by its weight is pressed against a mold to form a lens surface. 2. The lens manufacturing method according to claim 1, wherein lead or a lead alloy is used as the metal or alloy whose melting point is lower than the softening point of the lens material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13903189A JPH035703A (en) | 1989-06-02 | 1989-06-02 | Lens manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13903189A JPH035703A (en) | 1989-06-02 | 1989-06-02 | Lens manufacturing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH035703A true JPH035703A (en) | 1991-01-11 |
Family
ID=15235851
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13903189A Pending JPH035703A (en) | 1989-06-02 | 1989-06-02 | Lens manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH035703A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007224700A (en) * | 2005-08-30 | 2007-09-06 | Sekisui Chem Co Ltd | Rail soundproofing device |
| DE102013016496A1 (en) * | 2013-10-02 | 2015-04-02 | Leopold Kostal Gmbh & Co. Kg | Method for producing a hollow glass body from a glass plate |
-
1989
- 1989-06-02 JP JP13903189A patent/JPH035703A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007224700A (en) * | 2005-08-30 | 2007-09-06 | Sekisui Chem Co Ltd | Rail soundproofing device |
| DE102013016496A1 (en) * | 2013-10-02 | 2015-04-02 | Leopold Kostal Gmbh & Co. Kg | Method for producing a hollow glass body from a glass plate |
| DE102013016496B4 (en) * | 2013-10-02 | 2018-05-30 | Leopold Kostal Gmbh & Co. Kg | Method for producing a hollow glass body from a glass plate |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS632822A (en) | Glass optical element molding process and multi-part cast mold assembly therefor | |
| SG68657A1 (en) | Process and apparatus for hot forming precision structures in flat glass | |
| JPH035703A (en) | Lens manufacturing method | |
| JPH0435426B2 (en) | ||
| US20080165438A1 (en) | Optical lens unit including lens barrel containing lens and method for producing optical lens unit | |
| JPS62128932A (en) | Glass lens molding method | |
| MY134093A (en) | Method and apparatus for making large-scale precision structures in flat glass | |
| JPH0692654A (en) | Method for molding glass lens | |
| JPH03237023A (en) | Production of optical part | |
| US4842632A (en) | Method of making multifocal lens blanks | |
| KR100212916B1 (en) | Apparatus for optical glass | |
| JP2501588B2 (en) | Mold for press molding optical glass element and molding method thereof | |
| JP4744352B2 (en) | Method for manufacturing composite optical element | |
| JP3323556B2 (en) | Press molding method for optical glass element | |
| JPH05279062A (en) | Glass lens molding method | |
| JP3164394B2 (en) | Optical element molding apparatus, optical element molding method, and glass lens | |
| JP3209722B2 (en) | Method for molding optical element and optical element | |
| JPS6296328A (en) | Molding method for optical glass elements | |
| JPS6168331A (en) | Glass lens press molding method | |
| JPS62297234A (en) | Forming of glass lens | |
| JPS61266320A (en) | Method for holding optical glass material in press molding method for optical parts | |
| JPH0812352A (en) | Method for forming optical element | |
| JP4277348B2 (en) | Glass for mold lens | |
| JP2504997B2 (en) | Optical element molding method | |
| JP2002097025A (en) | Optical element molding material and optical element molding method using the same |