JPS6310101A - Lens and its manufacture - Google Patents
Lens and its manufactureInfo
- Publication number
- JPS6310101A JPS6310101A JP15451286A JP15451286A JPS6310101A JP S6310101 A JPS6310101 A JP S6310101A JP 15451286 A JP15451286 A JP 15451286A JP 15451286 A JP15451286 A JP 15451286A JP S6310101 A JPS6310101 A JP S6310101A
- Authority
- JP
- Japan
- Prior art keywords
- lens
- raw material
- mold
- die
- ring
- 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
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 239000000463 material Substances 0.000 claims description 34
- 238000000465 moulding Methods 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 9
- 238000003825 pressing Methods 0.000 claims description 7
- 230000003287 optical effect Effects 0.000 claims description 4
- 239000011521 glass Substances 0.000 abstract description 25
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 239000002994 raw material Substances 0.000 abstract 6
- 230000002093 peripheral effect Effects 0.000 abstract 2
- 230000001105 regulatory effect Effects 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229920003217 poly(methylsilsesquioxane) Polymers 0.000 description 1
- 238000001721 transfer moulding Methods 0.000 description 1
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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
Abstract
Description
【発明の詳細な説明】 産業上の利用分野 この発明は、レンズ及びその製造方法に関する。[Detailed description of the invention] Industrial applications The present invention relates to a lens and a method for manufacturing the same.
従来の技術
近年、コンパクトディスクやビデオディスク等に見られ
るように光学用機器の伸長が著しく、ガラスレンズ等の
光学部品の需要が急激に増えてきた。それに伴ない光学
部品の製造方法も、研削・研磨加工よシ、量産性の望め
る成形加工の研究が注目されている。BACKGROUND OF THE INVENTION In recent years, the demand for optical equipment such as compact discs and video discs has increased significantly, and the demand for optical components such as glass lenses has increased rapidly. As a result, research into manufacturing methods for optical components, such as grinding and polishing, as well as molding, which can be mass-produced, is attracting attention.
従来のガラスレンズの成形加工法は、第３図に示すごと
く、円筒状の胴型１の内径部に、上下よシ、その先端部
がレンズ球面を有した下型（押型）２と上型（押型）３
が、挿入され、その空間部（キャビティ）に、あらかじ
め両端部がほぼレンズ球面に加工された円柱状のガラス
レンズ素材４を入れておき、ガラスレンズ素材４が軟化
するまで加熱をする。加熱後は、上型３を矢印方向５よ
り、プレス等によシ、加圧すると、軟化されたガラスレ
ンズ素材は、胴型１、下型２及び上型３で形成される空
間部の形状に添って押しつぶされ成形加工される。In the conventional glass lens molding method, as shown in Fig. 3, a lower mold (pressing mold) 2 whose tip end has a spherical lens surface and an upper mold are placed on the inner diameter of a cylindrical body mold 1. (Press mold) 3
is inserted, and a cylindrical glass lens material 4 whose both ends are processed into substantially spherical lens surfaces is placed in the space (cavity) and heated until the glass lens material 4 is softened. After heating, the upper mold 3 is pressed in the direction of the arrow 5 by a press or the like, and the softened glass lens material forms the shape of the space formed by the body mold 1, the lower mold 2, and the upper mold 3. It is then crushed and molded.
従って、所定のレンズ形状を得るためには、ガラスレン
ズ素材４の変形量よシ、多い目の加圧ストロークを必要
とする。即ち、上型３と銅製１とのスキマは、無負荷時
ａ、とし、加圧ストロークをａ２とすれば、ａ、−８２
＝８３となるべく余欲ストロークａ を必要とする。こ
のａ３は、ガラスしンズ素材の容積バラツキを吸収する
ために必要なスキマでもある。Therefore, in order to obtain a predetermined lens shape, a pressure stroke that is larger than the amount of deformation of the glass lens material 4 is required. That is, if the gap between the upper die 3 and the copper 1 is a when no load is applied, and the pressurizing stroke is a2, then it is a, -82
= 83, which requires a surplus stroke a of as much as possible. This a3 is also a gap necessary to absorb the volume variation of the glass resin material.
第４図は、金型に投入されるガラスレンズ素材４の形状
であり、第６図は、成形加工後の完成品軸の形状である
。FIG. 4 shows the shape of the glass lens material 4 put into the mold, and FIG. 6 shows the shape of the finished product shaft after molding.
°このように成形加工法では、レンズ球面部は、下型２
と上ｆｆ１３の先端部の球面形状に添い精度喪〈転写さ
れ成形加工されるため、例えば、上下それぞれの金型先
端部の形状を非球面形状にしておけば、容易に両面非球
面のガラスレンズ成形加工が可能である。°In this molding method, the spherical part of the lens is
Since the spherical shape of the tip of the upper FF13 is transferred and molded, for example, if the shape of the top and bottom mold tips is made aspherical, it is easy to create a glass lens with aspherical surfaces on both sides. Molding processing is possible.
第６図に示すＲ１及びＲ２ｄ、成形転写加工されたレン
ズの球面部である。R1 and R2d shown in FIG. 6 are the spherical portions of the lens subjected to molding and transfer processing.
発明が解決しようとする問題点
しかしながら、上記の成形加工法では、成形型に投入さ
れるレンズ素材の体積のバラツキの差が成形完成品レン
ズの肉厚部の寸法ｔ（第６図参照）のバラツキの差とな
って成形加工されるため、高精度のレンズ製作が極めて
難しいという問題点を有していた。Problems to be Solved by the Invention However, in the above-mentioned molding method, the difference in the volume of the lens material charged into the mold is the difference in the dimension t of the thick part of the molded finished lens (see Figure 6). The problem is that it is extremely difficult to manufacture lenses with high precision because the molding process results in variations.
本発明は、上記問題点に鑑み、成形型に投入されるレン
ズ素材の体積バラツキがあ１ても、成形完成品のレンズ
肉厚寸法が一定となるようにするものである。In view of the above-mentioned problems, the present invention is intended to ensure that the lens wall thickness dimension of the molded finished product remains constant even if there is some variation in the volume of the lens material charged into the mold.
問題点を解決するための手段
上記問題点を解決するために、本発明のレンズ及びその
製造方法は、成形型に投入されるレンズ素材の側周部に
、リング状の溝を加工しておき、かつ押型の加圧ストロ
ークが常に一定になるようにしたものである。Means for Solving the Problems In order to solve the above-mentioned problems, the lens of the present invention and the method for manufacturing the same include forming a ring-shaped groove on the side circumference of the lens material that is introduced into the mold. , and the pressing stroke of the pressing die is always constant.
作 用 この発明の作用は、次のようになる。For production The operation of this invention is as follows.
すなわち、加熱され軟化したレンズ素材は、プレス圧を
受けると、先ず上下両会Ｗ（一対の押型）の球面部（レ
ンズ曲面部）と接している箇所から変形及び転写が始ま
り、徐々に上下よシ中央部に変形が進み、最後にレンズ
素材の中央部のリング状の溝部が圧縮変形を受け、゛上
型が、銅製に当接した時点で加圧ストロークは０となシ
、成形は終る。この状態では、レンズ素材の溝部は、圧
縮による変形を受け、当初の溝幅寸法よシせばめられる
。この溝部の圧縮変形量によって、レンズ素材の体積バ
ラツキを吸収せしめることが可能となムこの結果、成形
完成品のレンズ肉厚寸法は、一定となシ、高精度なレン
ズ成形加工品が得られる。In other words, when the heated and softened lens material is subjected to press pressure, deformation and transfer first start from the parts where it contacts the spherical part (lens curved part) of the upper and lower halves W (a pair of molds), and gradually from the upper and lower parts. The deformation progresses to the center of the lens material, and finally the ring-shaped groove in the center of the lens material undergoes compression deformation. When the upper mold comes into contact with the copper, the pressure stroke becomes 0 and molding ends. . In this state, the groove portion of the lens material is deformed by compression and is fitted to the original groove width dimension. The amount of compressive deformation of this groove part makes it possible to absorb volumetric variations in the lens material.As a result, the lens thickness dimension of the finished molded product remains constant, and a highly accurate lens molded product can be obtained. .
実施例
以下本発明の一実施例を添付図面にもとづいて説明する
。第１図は、リング状の溝部１１を有すルカラスレンズ
素材ｅを成形Ｗ１２のキャビティ１３内に配置した状態
における断面図である。EXAMPLE Hereinafter, an example of the present invention will be described based on the accompanying drawings. FIG. 1 is a sectional view of a state in which a glass lens material e having a ring-shaped groove 11 is placed in a cavity 13 of a molding W12.
図に示すごとく、レンズ外径にほぼ和尚する内径を備え
た円筒状９胴Ｗ１１の内径部分に、上下よシその抑圧面
がレンズ曲面を有した下ｆｆ１（押！り７と上載（押型
）３が挿入され、そのキャビティ１３に１両端が前記レ
ンズ球面と略等しい曲面に加工され、その＃１ぼ中央部
の側周部に、りング状の溝１１が加工されたガラスレン
ズ素材９を入れておき、従来例と同様に、ガラスレンズ
素材ｅが軟化するまで加熱をする。ガラスレンズ素材９
が軟化した後は、上型９を矢印方向１ｏよシ、プレス等
により加圧すると、ガラスレンズ素材９は、先ず両端の
曲面部から変形及び転写が始まり、徐々に中央部に変形
が進み、上型８の鍔８ａが銅製６の端面に当接するまで
変形が続く。即ち、上型８による加圧ストロークは、δ
４で規制される。As shown in the figure, a lower ff1 (presser 7 and upper mounting (press mold)) whose suppressing surfaces on both the upper and lower sides have curved lens surfaces is attached to the inner diameter part of a cylindrical 9-body W11 with an inner diameter that is approximately equal to the outer diameter of the lens. 3 is inserted into the cavity 13, and a glass lens material 9 is inserted into the cavity 13, with both ends of the glass lens material 9 processed to have a curved surface substantially equal to the spherical surface of the lens, and a ring-shaped groove 11 formed on the side circumference of the central part of the glass lens material 9. Glass lens material 9 is heated until the glass lens material e is softened, as in the conventional example.
After softening, when the upper mold 9 is moved in the direction of the arrow 1o and pressurized by a press or the like, the glass lens material 9 first begins to deform and transfer from the curved portions at both ends, and gradually deforms to the center. The deformation continues until the collar 8a of the upper mold 8 comes into contact with the end face of the copper 6. That is, the pressurizing stroke by the upper die 8 is δ
It is regulated by 4.
第４図は、上型８が銅製６に当接した状態を示す断面図
である。ガラスレンズ素材９の曲面部及び中央部は、成
形型１２に添って押しつぶされ。FIG. 4 is a sectional view showing a state in which the upper die 8 is in contact with the copper 6. The curved surface portion and center portion of the glass lens material 9 are crushed along the mold 12.
それぞれの成形型形状に密着転写成形される。但しガラ
スレンズ素材ｅに設けたほぼ中央部のリング状の溝１１
は、完全に成形で押しつぶされるのではなく、変形は途
中で停止する。、即ち溝部寸法が、当初谷径り１幅寸法
！であったものが、成形加工後は、谷径Ｖ１幅寸法Ｉ′
につぶされて変形される。即ち上記のリング状の溝１１
の変形進行度によって、投入されるガラスレンズ素材ｅ
の体ｍバラツキを吸収させ、レンズ肉厚の寸法Ｔを確保
することができる。Transfer molding is performed in close contact with the shape of each mold. However, the ring-shaped groove 11 provided approximately in the center of the glass lens material e
is not completely crushed by molding, but the deformation stops midway. , that is, the groove dimension is initially one width dimension of the valley diameter! However, after the molding process, the valley diameter V1 width dimension I'
It is crushed and transformed. That is, the ring-shaped groove 11 described above
Depending on the degree of deformation progress, the glass lens material e
It is possible to absorb the variation in body m and ensure the lens thickness dimension T.
以上のように、成形加工するガラスレンズ素材の側周部
にリング状の溝を入れておき、かつ、上型の加圧ストロ
ークを規制することＫよって、成形加工するガラスレン
ズ素材の体積バラツキを吸収し、レンズ肉厚寸法が所定
寸法τとなるように成形加工することができる。As described above, by creating a ring-shaped groove in the side circumference of the glass lens material to be molded and regulating the pressure stroke of the upper mold, the volume variation of the glass lens material to be molded can be reduced. It can be molded so that the lens thickness dimension becomes a predetermined dimension τ.
なお実施例では、リング状の溝を１・本としたが複数本
設けても良い。In the embodiment, one ring-shaped groove is provided, but a plurality of ring-shaped grooves may be provided.
また、実施例では成形加工する素材をガラスレンズとし
たが、熱によって軟化する素材であれば何でも良いこと
は明白である。ｔた、本実施例では、上型の加圧ストロ
ークを側型で規制したがプレス軸を規制しても良＜、ま
た、下型を加圧しても結果は同じである。Further, in the embodiment, the material to be molded is a glass lens, but it is obvious that any material that softens with heat may be used. In addition, in this embodiment, the pressurizing stroke of the upper die is regulated by the side dies, but the press shaft may also be regulated.Also, the result will be the same even if the lower die is pressurized.
発明の効果
以上のように、本発明によれば成形加工するレンズ素材
の側周部に、リング状の溝を入れておき。Effects of the Invention As described above, according to the present invention, a ring-shaped groove is formed in the side circumference of the lens material to be molded.
かつ押型の加圧ストロークを規制することにょうて、成
形加工時のレンズ素材の体積のバラツキを吸収し、完成
品たるレンズの肉厚寸法を一定に保つことができる。In addition, by regulating the pressurizing stroke of the press, it is possible to absorb variations in the volume of the lens material during molding, and to maintain a constant wall thickness of the finished lens.
第１図は本発明の実施例における成形加工前の状態を示
す断面図、第２図は本発明の実施例における成形加工後
の状態を示す断面図、第３図は従来例における成形加工
法の成形型断面図、第４図は従来例におけるレンズ素材
の形状を示す概略図、ｒ：６図は従来例における成形加
工後の完成品の形状を示す概略図である。
６・・・・・・側型、７，８・・・・・・押型、９・・
・・・・レンズ素材、１１・・・・・・溝、１２・・・
・・・成形型、１３・・・・・・キャビティ。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名Ｐ−
Ｉ ｑFIG. 1 is a sectional view showing the state before molding in the embodiment of the present invention, FIG. 2 is a sectional view showing the state after molding in the embodiment of the present invention, and FIG. 3 is the molding method in the conventional example. FIG. 4 is a schematic diagram showing the shape of the lens material in the conventional example, and FIG. 6 is a schematic diagram showing the shape of the finished product after molding in the conventional example. 6...Side mold, 7,8...Press mold, 9...
...Lens material, 11...Groove, 12...
...Mold, 13...Cavity. Name of agent: Patent attorney Toshio Nakao and 1 other person P-
Iq
Claims (2)
る曲面を有し、光軸に対し直角な面内の外周部にリング
状のスリット溝を形成したレンズ。(1) A lens having a curved surface constituting the lens on at least one of two opposing surfaces, and a ring-shaped slit groove formed on the outer periphery in a plane perpendicular to the optical axis.
胴型に収嵌される一対の押型とからなる成形型のキャビ
ティ内に、各押型の押圧面のレンズ曲面と略等しい曲面
を両端部に備え、且つ側周部にリング状の溝が周設され
たレンズ素材を配置した後、レンズ素材を軟化させた状
態で加圧ストロークが一定となるようにして両押型間に
圧力を加えてレンズを成形することを特徴とするレンズ
の製造方法。(2) a barrel shape with an inner diameter approximately equivalent to the outer diameter of the lens;
In the cavity of the mold, which is made up of a pair of pressing molds that are fitted into the body mold, curved surfaces approximately equal to the lens curved surfaces of the pressing surfaces of each pressing mold are provided at both ends, and a ring-shaped groove is provided around the side periphery. A method for manufacturing a lens, which comprises placing the lens material in a softened state and molding the lens by applying pressure between both molds with a constant pressure stroke while the lens material is softened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15451286A JPS6310101A (en) | 1986-07-01 | 1986-07-01 | Lens and its manufacture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15451286A JPS6310101A (en) | 1986-07-01 | 1986-07-01 | Lens and its manufacture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6310101A true JPS6310101A (en) | 1988-01-16 |
Family
ID=15585872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15451286A Pending JPS6310101A (en) | 1986-07-01 | 1986-07-01 | Lens and its manufacture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6310101A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2002214292B2 (en) * | 2000-11-15 | 2005-12-08 | Hamamatsu Photonics K.K. | Gas discharge tube |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS597456A (en) * | 1982-07-07 | 1984-01-14 | Nissan Motor Co Ltd | Rack shaft slug of variable ratio steering device |
| JPS60118642A (en) * | 1983-11-30 | 1985-06-26 | Hoya Corp | Mold for forming glass lens |
-
1986
- 1986-07-01 JP JP15451286A patent/JPS6310101A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS597456A (en) * | 1982-07-07 | 1984-01-14 | Nissan Motor Co Ltd | Rack shaft slug of variable ratio steering device |
| JPS60118642A (en) * | 1983-11-30 | 1985-06-26 | Hoya Corp | Mold for forming glass lens |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2002214292B2 (en) * | 2000-11-15 | 2005-12-08 | Hamamatsu Photonics K.K. | Gas discharge tube |
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