JP3128928B2 - Lens molding die and lens molding method - Google Patents
Lens molding die and lens molding methodInfo
- Publication number
- JP3128928B2 JP3128928B2 JP4672692A JP4672692A JP3128928B2 JP 3128928 B2 JP3128928 B2 JP 3128928B2 JP 4672692 A JP4672692 A JP 4672692A JP 4672692 A JP4672692 A JP 4672692A JP 3128928 B2 JP3128928 B2 JP 3128928B2
- Authority
- JP
- Japan
- Prior art keywords
- lens
- mirror surface
- molding
- edge
- mold
- 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
- Moulds For Moulding Plastics Or The Like (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は光学レンズの成形用金型
及び成形方法に関し、特にハロゲン化銀結晶をレンズ材
料に用いた赤外線透過レンズの成形用金型及び成形方法
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding die and a molding method for an optical lens, and more particularly to a molding die and a molding method for an infrared transmitting lens using a silver halide crystal as a lens material.
【０００２】[0002]
【従来の技術】近年、光学レンズの量産工法としてプレ
ス成形法が注目されている。工程の大幅な簡略化と、高
性能な非球面レンズの加工も容易に行えるという利点が
ある。2. Description of the Related Art In recent years, a press molding method has attracted attention as a mass production method for optical lenses. There are advantages that the process is greatly simplified and that a high-performance aspherical lens can be easily processed.
【０００３】ハロゲン化銀結晶は、その高い透過率を活
かし、赤外線センサ用高感度レンズ等の素材として期待
されているが、研磨加工が困難であり、量産に向かない
という課題があった。[0003] Silver halide crystals are expected to be used as materials for high-sensitivity lenses for infrared sensors, taking advantage of their high transmittance, but have the problem that polishing is difficult and not suitable for mass production.
【０００４】しかし一方でハロゲン化銀結晶は、押し出
し加工によるファイバ化も可能であるほど塑性変形能が
高く、他の材料には無いこのような特長を活かした、プ
レス成形による高性能な非球面レンズ量産への期待が高
まっている。[0004] On the other hand, silver halide crystals have a high plastic deformability so that they can be formed into fibers by extrusion, and a high-performance aspherical surface formed by press molding utilizing such features not available in other materials. Expectations for mass production of lenses are increasing.
【０００５】以下図面を参照しながら、上記した従来の
プレス成形用金型構造、及び成形方法の一例について説
明する。[0005] Hereinafter, an example of the above-described conventional press-molding die structure and a molding method will be described with reference to the drawings.
【０００６】図７は従来の赤外レンズ製造方法に用いら
れる装置の構造を示す要部断面図であり、１１はレンズ
形状を転写するための鏡面部１２を有した上レンズ金型
であり、１３はレンズ形状を転写するための鏡面部１４
を有した下レンズ金型である。１５は例えば塩化銀・臭
化銀等のハロゲン化銀結晶から成るレンズ硝材であり、
適応する大きさに切り出されている。１６は金型を納め
るコンテナ、１７はコンテナ内壁に摺動し、成形圧を加
える加圧棒である。FIG. 7 is a sectional view of a main part showing the structure of an apparatus used in a conventional method of manufacturing an infrared lens. Reference numeral 11 denotes an upper lens mold having a mirror surface portion 12 for transferring a lens shape. 13 is a mirror surface portion 14 for transferring a lens shape
Is a lower lens mold having the following. Reference numeral 15 denotes a lens glass material made of silver halide crystals such as silver chloride and silver bromide.
It has been cut out to fit. Reference numeral 16 denotes a container for accommodating a mold, and 17 denotes a pressure rod which slides on the inner wall of the container and applies a molding pressure.
【０００７】以下、その動作について説明する。レンズ
硝材１５を上下レンズ金型１１，１３間の中心に載置し
上方の加圧棒１７で加圧すると、レンズ硝材１５は鏡面
部１２、１４に沿って流動し、レンズ形状を転写する。The operation will be described below. When the lens glass material 15 is placed at the center between the upper and lower lens molds 11 and 13 and pressed by the upper pressing rod 17, the lens glass material 15 flows along the mirror surfaces 12 and 14 to transfer the lens shape.
【０００８】[0008]
【発明が解決しようとする課題】しかしながら上記のよ
うな構成では、切り出された結晶片が最初から金型の鏡
面部に接触しており、これを押圧するだけでは接触部近
傍のミクロな変形が起こり難く、接触部の結晶はコンテ
ナ１６内壁側と鏡面部中心側に流動するが、鏡面部中心
部では流動がほとんどなく、図８に示すように結晶片表
面の切削傷、研削傷１８が成形後にも残ってしまうとい
う問題点を有していた。However, in the above-described structure, the cut crystal piece is in contact with the mirror surface of the mold from the beginning, and micro-deformation near the contact portion can be obtained only by pressing this. It occurs hardly, the contact portion of the crystal Conte
It flows to the inner wall side and the mirror surface center side of the
In the portion, there was almost no flow, and as shown in FIG. 8, there was a problem that a cutting flaw and a grinding flaw 18 on the surface of the crystal piece remained even after molding.
【０００９】さらに、結晶材料の塑性変形能はその結晶
構造に従って異方性を持ち、その結果本来回転軸対称で
あるべきレンズに非対称な形状誤差が残るという問題点
を有していた。図９はその一例を示す成形レンズ面の干
渉縞を示す図である。また、金型の曲率半径の大小によ
る最適成形圧の制御もできなかった。Furthermore, the plastic deformability of crystalline material has an anisotropic according to the crystal structure, asymmetric shape errors has been a problem that remains in the result original rotation axis symmetry which should be lens . FIG. 9 is a diagram showing an example of the interference fringes on the molded lens surface. Also, it was not possible to control the optimum molding pressure based on the radius of curvature of the mold.
【００１０】本発明は上記問題点に鑑み、レンズ素材の
表面傷を残さずに所望レンズ面の転写成形を行い、同時
にマクロな形状誤差を発生させないプレス成形法、及び
それを実現する成形金型を提供することを目的とする。In view of the above problems, the present invention provides a press molding method for performing transfer molding of a desired lens surface without leaving a surface flaw of a lens material and at the same time generating no macro shape error, and a molding die for realizing the same. The purpose is to provide.
【００１１】[0011]
【課題を解決するための手段】上記問題点を解決するた
め、本発明のレンズ成形用金型は、レンズ面形状を転写
するための鏡面部とその鏡面部と一体的に形成され且つ
その鏡面部をとりまくコバ部からなり、上型と下型とで
それぞれ前記コバ部の摩擦係数が異なる、また各金型で
摩擦係数が分布を持つ、という特徴を備えたものであ
る。また本発明のレンズ成形方法は摩擦係数を制御する
ための前記コバ部にレンズ素材を保持しながら押圧する
ことを特徴とするものである。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a lens molding die of the present invention is provided with a mirror surface portion for transferring a lens surface shape, and is integrally formed with the mirror surface portion.
It consists of the edge around the mirror surface, and the upper and lower molds
It is characterized in that the edge portions have different friction coefficients, and that the dies have a distribution of friction coefficients. Further, the lens molding method of the present invention controls the coefficient of friction.
And pressing the lens material while holding the lens material on the edge portion.
【００１２】[0012]
【作用】本発明では上記の構成によって、コバ部に保持
された結晶片が押圧されると外周部から金型鏡面に沿う
ようにミクロな塑性変形が進行する。従って、徐々にレ
ンズ面形状が転写されて行くため、結晶片表面に残存す
る傷が消滅する。さらに、上型と下型とでコバ部の摩擦
係数が異なるため、各金型の曲率に適した成形圧が与え
られる。この作用によって成形後の形状誤差を最小に抑
えることが出来る。またコバ上で摩擦係数の分布を持た
せることによって、成形圧に方向性が与えられる。この
作用により結晶材料特有の非対称な誤差成分をも取り除
くことが出来る。According to the present invention, when the crystal piece held by the edge portion is pressed by the above structure, micro plastic deformation proceeds along the mold mirror surface from the outer peripheral portion. Therefore, since the lens surface shape is gradually transferred, the scratches remaining on the surface of the crystal piece disappear. Further, since the upper die and the lower die have different friction coefficients at the edge, a molding pressure suitable for the curvature of each die is given. By this operation, the shape error after molding can be minimized. By giving the distribution of the coefficient of friction on the edge, directionality is given to the molding pressure. This effect makes it possible to remove also the crystalline material specific asymmetric error components.
【００１３】[0013]
【実施例】以下本発明の一実施例のレンズ成形用金型に
ついて、図面を参照しながら説明する。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a lens forming mold according to an embodiment of the present invention.
【００１４】図１は本発明の実施例におけるレンズ成形
金型の構造を示す要部断面図である。図１は、レンズ成
形に使用する金型で、１はレンズ形状を転写するための
凹面の鏡面部、２はレンズ素材を保持し押圧するための
コバ部であり、レンズ曲率の大小に応じて、例えば面粗
さを変えることにより異なる摩擦係数を有しているもの
である。このコバ部２は前記鏡面部１の周囲に一体的に
形成されている。 FIG. 1 is a sectional view of a main part showing a structure of a lens forming die according to an embodiment of the present invention. FIG. 1 shows a mold used for molding a lens. Reference numeral 1 denotes a concave mirror surface portion for transferring a lens shape, and 2 denotes an edge portion for holding and pressing a lens material. For example, those having different friction coefficients by changing the surface roughness. This edge portion 2 is integrally formed around the mirror surface portion 1.
Is formed.
【００１５】以上のように構成されたレンズ成形金型を
用いた成形について、以下図２及び図３を用いてその動
作を説明する。The operation of molding using the lens molding die configured as described above will be described below with reference to FIGS.
【００１６】まず図２は曲率の大きな鏡面部を持つ上レ
ンズ金型３と、曲率の小さな鏡面部を持つ下レンズ金型
４でレンズ硝材５を成形する場合の成形装置構成図であ
る。図３に示すようにこの組金型をコンテナ８内に配置
し、加圧棒９で成形圧を与え所望のレンズ形状を得る。
すなわち加圧棒９に圧力を加えると、前記レンズ硝材５
はまず上下レンズ金型３、４の接触しているコバ部６、
７で押圧され、コバ部６、７に沿って一部はコンテナ８
内壁側に流動し、一部は鏡面部に流動していくため、徐
々にレンズ形状が転写されていくものである。 FIG. 2 is a configuration diagram of a molding apparatus for molding a lens glass material 5 using an upper lens mold 3 having a mirror surface portion having a large curvature and a lower lens mold 4 having a mirror surface portion having a small curvature. As shown in FIG. 3, this assembly die is placed in a container 8 and a molding pressure is applied by a pressure rod 9 to obtain a desired lens shape.
That is, when pressure is applied to the pressure rod 9, the lens glass 5
First, the edge portion 6 where the upper and lower lens molds 3 and 4 are in contact,
7 and partly along the edges 6, 7 of the container 8
Since it flows to the inner wall side and part flows to the mirror surface,
Each lens shape is transferred.
【００１７】このとき、上レンズ金型３のコバ部６の摩
擦係数は大きく、下レンズ金型４のコバ部７の摩擦係数
は小さくなるように構成してある。これによって前記作
用の項で述べたように、レンズ硝材５の、上レンズ金型
３のコバ部６に近接する部分では金型半径方向内側への
圧力を大きく受け、曲率の大きなレンズ鏡面形状に倣い
やすく流動し成形が進行する。At this time, the friction coefficient of the edge 6 of the upper lens mold 3 is large, and the friction coefficient of the edge 7 of the lower lens mold 4 is small. As a result, as described in the above section, the upper lens mold of the lens glass material 5 is used.
The portion close to the edge 6 of the mold 3 receives a large pressure inward in the mold radial direction, and follows the lens mirror shape having a large curvature.
It flows easily and molding proceeds.
【００１８】一方、レンズ硝材５の、下レンズ金型４の
コバ部７に近接する部分では金型半径方向内側への圧力
が小さく、曲率の小さなレンズ鏡面形状に倣う成形が進
行する。Meanwhile, the lens glass material 5, reduced pressure to the mold radially inward at a portion adjacent to <br/> edge portion 7 of the lower lens mold 4, the molding is advanced to follow the small lens mirror shape of curvature I do.
【００１９】以上のように本実施例によれば、成形され
るレンズの曲率に応じてコバ部の摩擦係数を変え、レン
ズ鏡面部に加わる圧力、また材料の流れを制御すること
により、最適な成形条件を満たし、鏡面部中心部でも材
料の流れがあることでレンズ表面に残存する傷が消滅し
且つ成形後の形状誤差を最小に抑えることができる。As described above, according to this embodiment, the friction coefficient of the edge portion is changed in accordance with the curvature of the lens to be formed, and the pressure applied to the mirror surface of the lens and the flow of the material are controlled, so that the optimum flow is achieved. Satisfies molding conditions, and material even in the center of mirror surface
The flow of material eliminates any scratches remaining on the lens surface.
In addition, the shape error after molding can be minimized.
【００２０】以下、本発明の第２の実施例について図面
を参照しながら説明する。図４は本発明の第２の実施例
を示すレンズ成形金型の構成図である。これを用いてレ
ンズ成形を行う過程は、図１に示した金型を用いる第１
の実施例と同様のものである。図１と異なるのは、コバ
部２の斜線部２ａでは摩擦係数を斜線部で示すように一
方向で大きく、それに直交する方向で小さい領域２ｂを
形成した点である。Hereinafter, a second embodiment of the present invention will be described with reference to the drawings. FIG. 4 is a configuration diagram of a lens molding die showing a second embodiment of the present invention. The process of performing lens molding using this is the first process using the mold shown in FIG.
This is similar to the embodiment. The difference from FIG. 1 is that the hatched portion 2a of the edge portion 2 has a region 2b in which the friction coefficient is large in one direction as shown by the hatched portion and small in the direction perpendicular thereto.
【００２１】以上のように構成されたレンズ成形金型に
ついて、以下その動作を説明する。例えば結晶材料のよ
うな異方性のあるレンズ硝材を、方位を確認した上で図
４のレンズ金型に載せる。このときレンズ硝材の変形し
にくい方向を、コバ部の摩擦係数の大きな方向すなわち
相対する２ａ領域に合わせ、レンズ硝材の変形しやすい
方向を摩擦係数の小さい２ｂ領域に合わせて載置する。
そして加圧を行えばレンズ硝材の変形しにくい方向では
金型半径方向内側への圧力を大きく受けた成形圧が与え
られ、レンズ硝材の変形しやすい方向では金型半径方向
内側への圧力を小さく受けた成形圧が与えられることで
レンズ鏡面形状に倣いやすく流動して成形が進行し、異
方性による非対称な形状誤差が除去される。 The operation of the lens molding die configured as described above will be described below. For example, an anisotropic lens material such as a crystal material is placed on the lens mold of FIG. 4 after confirming the orientation. At this time, the lens glass is deformed
The difficult direction is the direction in which the friction coefficient of the edge is large,
The lens glass material is easily deformed according to the opposing 2a area.
The direction is set so as to match the 2b area having a small friction coefficient.
And if pressure is applied, in the direction where the lens glass material is difficult to deform
Molding pressure is applied due to the large inward pressure in the mold radial direction.
In the direction in which the lens glass material is easily deformed,
By giving the molding pressure that received the small inward pressure,
It is easy to follow the lens mirror surface shape, flows and molding proceeds,
Asymmetric shape errors due to anisotropy are removed.
【００２２】以上のように、コバ部の摩擦係数を一方向
で大きく、それに直交する方向で小さくなるように分布
させることにより、成形圧の方位制御が出来、結晶材料
のような異方性のある材料の成形において、非対称な誤
差成分が除去された優れたレンズを得ることが出来る。As described above, by distributing the friction coefficient of the edge portion so as to be large in one direction and small in the direction perpendicular thereto, the orientation of the molding pressure can be controlled, and the anisotropy such as a crystalline material can be controlled. In molding a certain material, an excellent lens from which asymmetric error components have been removed can be obtained.
【００２３】なお、第１の実施例において、コバ部の摩
擦係数の制御を、面の粗さで実現したが、図５に示すよ
うに、コバ部の傾斜１０によってこれを実現してもよ
い。In the first embodiment, the control of the friction coefficient of the edge portion is realized by the roughness of the surface. However, as shown in FIG. 5, this may be realized by the inclination 10 of the edge portion. .
【００２４】また、第２の実施例では摩擦係数を直交方
向に分布させたが、摩擦係数の大きな領域２ａと摩擦係
数の小さな領域２ｂを図６に示すように分布させてもよ
い。Although the friction coefficient is distributed in the orthogonal direction in the second embodiment, the area 2a having a large friction coefficient and the area 2b having a small friction coefficient may be distributed as shown in FIG.
【００２５】[0025]
【発明の効果】以上のように本発明のレンズ成形用金型
は、レンズ面形状を転写するための鏡面部とその鏡面部
と一体的に形成され且つその鏡面部をとりまくコバ部か
らなり、上型と下型とでそれぞれ前記コバ部の摩擦係数
が異なる、また各金型で摩擦係数が分布を持つ、という
特徴を備えたものである。また本発明のレンズ成形方法
は摩擦係数を制御するための前記コバ部にレンズ素材を
保持しながら押圧することを特徴とするものである。As described above, the lens molding die of the present invention has a mirror surface portion for transferring the lens surface shape and the mirror surface portion.
The upper die and the lower die are formed integrally with each other, and the upper die and the lower die have different friction coefficients, and each die has a distribution of the friction coefficient. It is a thing. The lens molding method of the present invention is characterized in that the lens material is pressed while holding the lens material on the edge for controlling the coefficient of friction .
【００２６】上記の構成によって、コバ部に保持された
レンズ素材が押圧され、変形が進むに従って、外周部か
ら金型鏡面に沿うように徐々にレンズ面形状が転写され
て行くため、レンズ素材表面に残存する傷が消滅する。
さらに、上型と下型とでコバ部の摩擦係数が異なるた
め、レンズの曲率に適した成形圧が加わり、成形後の形
状誤差が最小に抑えられ、高精度な非球面レンズの量産
加工を実現するものである。また、結晶材料の成形にお
いてもコバ上で摩擦係数の分布を持たせることによっ
て、結晶材料特有の非対称な誤差成分をも取り除くこと
が出来、軸対称なレンズ成形を実現するものである。With the above arrangement, as the lens material held by the edge is pressed and the deformation progresses, the lens surface shape is gradually transferred from the outer peripheral portion along the mirror surface of the mold. The remaining scars disappear.
Furthermore, since the friction coefficient of the edge part differs between the upper mold and the lower mold, a molding pressure suitable for the curvature of the lens is applied, the shape error after molding is minimized, and mass production processing of high-precision aspherical lenses is achieved. It will be realized. Further, by giving the distribution of the coefficient of friction on the edge even in the molding of crystalline material, the crystalline material specific asymmetric error components can also be removed, thereby realizing the axisymmetric lens molding .
【図１】本発明のレンズ成形用金型の第１の実施例を示
す斜視図FIG. 1 is a perspective view showing a first embodiment of a lens molding die according to the present invention.
【図２】同実施例金型を用いた成形の説明図FIG. 2 is an explanatory view of molding using the mold of the embodiment.
【図３】同実施例金型を用いた成形の説明図FIG. 3 is an explanatory view of molding using the mold of the embodiment.
【図４】本発明のレンズ成形用金型の第２の実施例を示
す正面図FIG. 4 is a front view showing a second embodiment of the lens molding die of the present invention.
【図５】本発明のレンズ成形用金型の第３の実施例を示
す要部断面図FIG. 5 is a sectional view of a main part showing a third embodiment of the lens molding die of the present invention.
【図６】本発明のレンズ成形用金型の第４の実施例を示
す正面図FIG. 6 is a front view showing a fourth embodiment of the lens molding die according to the present invention.
【図７】従来の成形用金型によるレンズ成形装置の要部
断面図FIG. 7 is a sectional view of a main part of a conventional lens forming apparatus using a molding die.
【図８】従来の成形法によって成形されたレンズの説明
図FIG. 8 is an explanatory view of a lens molded by a conventional molding method.
【図９】従来の成形法によって成形されたレンズの非対
称形状誤差を示す説明図FIG. 9 is an explanatory diagram showing an asymmetrical shape error of a lens formed by a conventional forming method.
１ 鏡面部 ２、６、７、１０ コバ部 ３、４レンズ成形用金型 ５ レンズ硝材 ８ コンテナ ９ 加圧棒 DESCRIPTION OF SYMBOLS 1 Mirror surface part 2, 6, 7, 10 Edge part 3, 4 Lens molding die 5 Lens glass material 8 Container 9 Pressure rod
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ // Ｂ２９Ｌ 11:00 (56)参考文献 特開 平２−209213（ＪＰ，Ａ) 特開 平２−157130（ＪＰ，Ａ) 特開 平５−249305（ＪＰ，Ａ) 特開 平５−208833（ＪＰ，Ａ) 特開 平５−208834（ＪＰ，Ａ) 特開 昭60−58816（ＪＰ，Ａ) 特開 昭59−123632（ＪＰ，Ａ) 特開 昭59−188601（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) B29C 43/36 - 43/42 B29C 33/38 C03B 11/08,11/00 C03C 3/32 G02B 1/02,3/02 ──────────────────────────────────────────────────続 き Continuation of the front page (51) Int.Cl. 7 Identification symbol FI // B29L 11:00 (56) References JP-A-2-209213 (JP, A) JP-A-2-157130 (JP, A JP-A-5-249305 (JP, A) JP-A-5-208833 (JP, A) JP-A-5-208834 (JP, A) JP-A-60-58816 (JP, A) JP-A-59-1984 123632 (JP, A) JP-A-59-188601 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) B29C 43/36-43/42 B29C 33/38 C03B 11/08, 11/00 C03C 3/32 G02B 1 / 02,3 / 02
Claims (4)
鏡面部と一体的に形成され且つその鏡面部をとりまくコ
バ部からなり、上型と下型とでそれぞれ前記コバ部の摩
擦係数が異なることを特徴とするレンズ成形用金型。[Claim 1] A mirror surface portion for transferring the lens shape that
It consists edge portion surrounding the mirror surface portion and integrally formed and the mirror surface portion, the lens forming mold friction coefficient respectively between the upper and lower molds the edge portions are different from each other.
鏡面部と一体的に形成され且つその鏡面部をとりまくコ
バ部からなり、前記コバ部の摩擦係数が分布を持つこと
を特徴とするレンズ成形用金型。Wherein a mirror surface portion for transferring the lens shape that
A lens molding die , which is formed integrally with a mirror surface portion and has an edge portion surrounding the mirror surface portion , wherein the friction coefficient of the edge portion has a distribution.
ことを特徴とする請求項１または２記載のレンズ成形用
金型。3. The lens molding die according to claim 1, wherein the coefficient of friction is controlled by the inclination of the edge.
鏡面部と一体的に形成され且つその鏡面部をとりまく摩
擦係数を制御するためのコバ部からなるレンズ成形用金
型を用い、前記コバ部にレンズ素材を保持しながら押圧
を行い所望のレンズ形状を得ることを特徴とするレンズ
成形方法。Wherein a mirror surface portion for transferring the lens shape that
Friction formed integrally with the mirror surface and surrounding the mirror surface
A lens molding method comprising: using a lens molding die having an edge portion for controlling a friction coefficient, and pressing while holding a lens material on the edge portion to obtain a desired lens shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4672692A JP3128928B2 (en) | 1992-03-04 | 1992-03-04 | Lens molding die and lens molding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4672692A JP3128928B2 (en) | 1992-03-04 | 1992-03-04 | Lens molding die and lens molding method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05245865A JPH05245865A (en) | 1993-09-24 |
| JP3128928B2 true JP3128928B2 (en) | 2001-01-29 |
Family
ID=12755348
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4672692A Expired - Fee Related JP3128928B2 (en) | 1992-03-04 | 1992-03-04 | Lens molding die and lens molding method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3128928B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100363281C (en) * | 2004-10-20 | 2008-01-23 | 亚洲光学股份有限公司 | Optical lens forming die |
| JP6374951B2 (en) * | 2014-04-04 | 2018-08-15 | オリンパス株式会社 | Optical element molding die set and optical element manufacturing method |
-
1992
- 1992-03-04 JP JP4672692A patent/JP3128928B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05245865A (en) | 1993-09-24 |
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