JPH0717391B2 - Optical glass element press molding method - Google Patents
Optical glass element press molding methodInfo
- Publication number
- JPH0717391B2 JPH0717391B2 JP63093746A JP9374688A JPH0717391B2 JP H0717391 B2 JPH0717391 B2 JP H0717391B2 JP 63093746 A JP63093746 A JP 63093746A JP 9374688 A JP9374688 A JP 9374688A JP H0717391 B2 JPH0717391 B2 JP H0717391B2
- Authority
- JP
- Japan
- Prior art keywords
- press
- optical glass
- molding
- molding die
- glass element
- 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
- 238000000465 moulding Methods 0.000 title claims description 56
- 239000005304 optical glass Substances 0.000 title claims description 39
- 238000000034 method Methods 0.000 title claims description 18
- 150000008282 halocarbons Chemical class 0.000 claims description 2
- 238000007731 hot pressing Methods 0.000 claims description 2
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 claims 1
- 239000010410 layer Substances 0.000 description 16
- 239000011521 glass Substances 0.000 description 9
- 239000000126 substance Substances 0.000 description 9
- 230000003287 optical effect Effects 0.000 description 6
- 238000003825 pressing Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000011368 organic material Substances 0.000 description 5
- 230000003746 surface roughness Effects 0.000 description 5
- BOSAWIQFTJIYIS-UHFFFAOYSA-N 1,1,1-trichloro-2,2,2-trifluoroethane Chemical compound FC(F)(F)C(Cl)(Cl)Cl BOSAWIQFTJIYIS-UHFFFAOYSA-N 0.000 description 4
- 229910000820 Os alloy Inorganic materials 0.000 description 2
- 229910003460 diamond Inorganic materials 0.000 description 2
- 239000010432 diamond Substances 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000012299 nitrogen atmosphere Substances 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical group ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 description 1
- DYCKMDCRYZZTOV-UHFFFAOYSA-N [Os].[Ir].[Pt] Chemical compound [Os].[Ir].[Pt] DYCKMDCRYZZTOV-UHFFFAOYSA-N 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 239000012300 argon atmosphere Substances 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 1
- QVQLCTNNEUAWMS-UHFFFAOYSA-N barium oxide Chemical compound [Ba]=O QVQLCTNNEUAWMS-UHFFFAOYSA-N 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- 239000005388 borosilicate glass Substances 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- ILNKLXHFYKXPKY-UHFFFAOYSA-N iridium osmium Chemical compound [Os].[Ir] ILNKLXHFYKXPKY-UHFFFAOYSA-N 0.000 description 1
- 229910000464 lead oxide Inorganic materials 0.000 description 1
- 239000002052 molecular layer Substances 0.000 description 1
- 239000012044 organic layer Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- YEXPOXQUZXUXJW-UHFFFAOYSA-N oxolead Chemical compound [Pb]=O YEXPOXQUZXUXJW-UHFFFAOYSA-N 0.000 description 1
- 125000005010 perfluoroalkyl group Chemical group 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B40/00—Preventing adhesion between glass and glass or between glass and the means used to shape it, hold it or support it
- C03B40/02—Preventing adhesion between glass and glass or between glass and the means used to shape it, hold it or support it by lubrication; Use of materials as release or lubricating compositions
-
- 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
- C03B11/086—Construction of plunger or mould for making solid articles, e.g. lenses material composition or material properties of press dies therefor of coated dies
-
- 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
- C03B2215/08—Coated press-mould dies
- C03B2215/10—Die base materials
- C03B2215/11—Metals
-
- 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
- C03B2215/08—Coated press-mould dies
- C03B2215/14—Die top coat materials, e.g. materials for the glass-contacting layers
- C03B2215/22—Non-oxide ceramics
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、レンズやプリズム等の高精度な光学ガラス素
子をプレス成形用型によって熱間でプレス成形する光学
ガラス素子のプリズム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 method of molding an optical glass element such as a lens or a prism, which is hot-pressed with a press molding die by hot pressing. .
従来の技術 近年、光学ガラスレンズは光学機器のレンズ構成の簡略
化とレンズ部分の軽量化の両方を同時に達成しうる非球
面化の方向にある。この非球面レンズの製造にあたって
は、従来の光学レンズの製造方法である研磨法では、加
工および量産化が困難であり、直接プレス成形法が有望
視されている。2. Description of the Related Art In recent years, optical glass lenses are in the direction of aspherical surface that can achieve both simplification of the lens structure of optical equipment and weight reduction of the lens portion at the same time. In manufacturing this aspherical lens, it is difficult to process and mass-produce it by a conventional polishing method which is a manufacturing method of an optical lens, and a direct press molding method is regarded as promising.
この直接プレス成形法というのは、予め所望の面品質お
よび面精度に仕上げた非球面形状のモールド上で、光学
ガラスの塊状物を加熱加圧成形するか、あるいは予め加
熱した光学ガラスの塊状物を加熱加圧成形を行い、それ
以後の研磨工程を必要としないで光学ガラスレンズを製
造する方法である。（例えば、特公昭54−38126号公
報） 発明が解決しようとする課題 特に非球面レンズの場合、非常に高い面精度であること
が要求されるため、成形用型は非常に高価なものにな
り、金型の損傷あるいは金型へのガラスの付着が起こり
にくい条件でプレス成形することが非常に重要である。This direct press molding method is a method in which an agglomerate of optical glass is heated and pressure-molded on an aspherical mold that is finished to a desired surface quality and surface accuracy in advance, or an agglomerate of optical glass that is preheated. Is a method for producing an optical glass lens without performing a subsequent polishing step. (For example, Japanese Examined Patent Publication No. 54-38126) Problems to be Solved by the Invention Particularly in the case of an aspherical lens, very high surface accuracy is required, and therefore the molding die becomes very expensive. It is very important to perform press molding under the condition that the mold is not damaged or glass is not attached to the mold.
しかしながら、光学ガラス素子のプレス成形は高温高圧
下で行われるため、光学ガラスと成形用型との融着、反
応によってガラス片あるいは異物等が成形用型のプレス
面に付着しやすくなる、あるいは成形用型のプレス面が
わずかに酸化されるということが起こりやすい。これら
のことを防止するために窒素雰囲気中、アルゴン雰囲気
中等の非酸化雰囲気中でプレス成形する試みがなされて
きたが、これらのことを完全に防止することはできず、
長期間にわたるプレス成形によって、非常に高い面精度
で加工した成形用型のプレス面に引っかき傷やすり傷の
損傷を受けやすくなる、プレス成形した光学ガラス素子
の表面性が悪くなる、離型性が悪くなる、成形サイクル
が長くなる等の課題があった。However, since the press molding of the optical glass element is performed under high temperature and high pressure, glass fragments or foreign matters are likely to adhere to the pressing surface of the molding die due to fusion and reaction between the optical glass and the molding die, or It is easy for the press surface of the mold to be slightly oxidized. In order to prevent these things, in a nitrogen atmosphere, an attempt has been made to press molding in a non-oxidizing atmosphere such as an argon atmosphere, but these things can not be completely prevented,
Press molding over a long period of time makes the press surface of the molding die processed with extremely high surface accuracy susceptible to scratches and scratches, the surface properties of the press-molded optical glass element deteriorate, and the releasability is poor. There were problems such as deterioration and lengthening of the molding cycle.
課題を解決するための手段 本発明は前記課題を解決するために、表面に有機物の薄
層を形成したプレス成形用型を用いて光学ガラス塊を熱
間でプレス成形する光学ガラス素子のプレス成形方法を
提供するものである。Means for Solving the Problems In order to solve the above problems, the present invention press-molds an optical glass element in which an optical glass block is hot-pressed using a press-molding die having a thin organic layer formed on the surface thereof. It provides a method.
作用 本発明の光学ガラス素子のプレス成形方法は、有機物の
薄層を介して光学ガラス塊をプレス成形用型によって熱
間でプレス成形することから、光学ガラス塊とプレス成
形用型とが直接接触しないで、また光学ガラス塊とプレ
ス成形用型との間に存在する有機物の薄層によって光学
ガラス塊とプレス成形用型との表面エネルギーが大幅に
低下するため、非常に高い面精度で加工した成形用型の
プレス面には微小なガラス片あるいは異物等が付着しな
くなりまた光学ガラスの離型性が大幅に向上する。また
有機物の薄層は、塗布法、吸着法、噴霧法、あるいは浸
漬法で形成することができ、その厚みは単分子層から数
分子層あるいは数10分子層程度であれば本発明の目的を
達成することができる。そしてトリクロロエチレン、ト
リクロルトリフルオルエタン等のハロゲン化炭化水素
類、Ｆ−113、Ｆ−11等のフルオロカーボン類等の有機
物が本発明の目的に合致している。Action In the method for press-molding the optical glass element of the present invention, since the optical glass block is hot press-molded by the press-molding die through the thin layer of the organic material, the optical glass block and the press-molding die are in direct contact with each other. In addition, the surface energy between the optical glass gob and the press-molding die is significantly reduced due to the thin layer of the organic substance existing between the optical glass gob and the press-molding die, so that the processing is performed with extremely high surface accuracy. No minute glass pieces or foreign substances adhere to the pressing surface of the molding die, and the releasability of the optical glass is greatly improved. Further, a thin layer of an organic substance can be formed by a coating method, an adsorption method, a spraying method, or a dipping method, and if the thickness is from a monomolecular layer to several molecular layers or several tens of molecular layers, the object of the present invention is Can be achieved. Organic substances such as halogenated hydrocarbons such as trichlorethylene and trichlorotrifluoroethane and fluorocarbons such as F-113 and F-11 are suitable for the purpose of the present invention.
実施例 以下本発明の一実施例について、図面を用いて説明す
る。Embodiment One embodiment of the present invention will be described below with reference to the drawings.
（実施例１） 第１図は本発明の実施例に係るガラスプレス成形用型の
断面図である。プレス成形用型の母材として超硬合金
（WC−5TiC−8Co）を用い、上型１には曲率半径が200mm
の凹形の成形面３を、下型２には曲率半径が46mmの凹形
の成形面４をそれぞれ形成した。これらの成形面３およ
び４を超微細なダイヤモンド粉末でラッピングし、約１
時間で表面の最大粗さ（Rmax）か約60Åの鏡面にした。
鏡面となった成形面３および４に、スパッタ法で白金−
イリジウム−オスミウム合金（Pt−Ir−Os）の薄膜を被
覆し、光学ガラス素子の成形用上型１および下型２を得
た。(Example 1) FIG. 1 is a cross-sectional view of a glass press mold according to an example of the present invention. Cemented carbide (WC-5TiC-8Co) is used as the base material of the press mold, and the upper mold 1 has a radius of curvature of 200 mm.
The concave molding surface 3 was formed on the lower mold 2 and the concave molding surface 4 having a radius of curvature of 46 mm was formed on the lower mold 2. These molding surfaces 3 and 4 are wrapped with ultrafine diamond powder to obtain about 1
The maximum roughness (Rmax) of the surface or the mirror surface of about 60Å was made in time.
On the mirror-formed molding surfaces 3 and 4, platinum was sputtered.
An iridium-osmium alloy (Pt-Ir-Os) thin film was coated to obtain an upper mold 1 and a lower mold 2 for molding an optical glass element.
窒素ガスをキャリアガスにしてトリクロルトリフルオル
エタン（C2Cl3F3）蒸気を成形機内に導入し、トリクロ
ルトリフルオルエタン（C2Cl3F3）を成形用上型１、下
型２および光学ガラス塊５に吸着させて成形用上型１お
よび下型２に分子層程度の膜厚のトリクロルトリフルオ
ルエタン（C2Cl3F3）薄層６を形成した状態で実施例１
と同様に酸化鉛系光学ガラス塊５を、第１図のように50
0℃に昇温された上述のプレス成形用型１および２を用
いて、プレス圧力40kg/cm2、プレス時間１分の条件でプ
レス成形した。成形レンズはそのまま冷却し410℃で上
下の型と離型し、直ちに徐冷炉にいれて徐冷し300℃で
取り出した。Using nitrogen gas as a carrier gas, trichlorotrifluoroethane (C 2 Cl 3 F 3 ) vapor was introduced into the molding machine, and trichlorotrifluoroethane (C 2 Cl 3 F 3 ) was molded into the upper mold 1, the lower mold 2, and Example 1 in a state where a trichlorotrifluoroethane (C 2 Cl 3 F 3 ) thin layer 6 having a film thickness of about a molecular layer was formed on the upper mold 1 and the lower mold 2 for adsorption by being adsorbed on the optical glass block 5.
As shown in Fig. 1, the lead oxide type optical glass block 5 is
Using the above-mentioned press-molding dies 1 and 2 heated to 0 ° C., press-molding was carried out under the conditions of a pressing pressure of 40 kg / cm 2 and a pressing time of 1 minute. The molded lens was cooled as it was, separated from the upper and lower molds at 410 ° C., immediately put in an annealing furnace and gradually cooled, and taken out at 300 ° C.
本発明のプレス成形方法を施した場合、プレス成形用型
の表面粗さ（Rmax）は約70Åであり、光学顕微鏡で観察
した結果その成形面に微小なガラス片、異物、あるいは
ゴミ等の付着や微細なキズも発生していなかったと共
に、高精度な面形状も変化していなかった。そして成形
した光学ガラスレンズは面精度ニュートンリング２本以
内、アス５分の１本以内、面粗さ0.01μｍであり、その
光学性能は極めて優れていると共に製品歩留りも非常に
良好であった。また光学ガラスがプレス成形用型から離
型する温度は従来約370℃であったが、本発明のプレス
成形方法の場合410℃と従来より高い温度で離型するこ
とができ、量産性を大幅に向上させることが可能になっ
た。When the press-molding method of the present invention is applied, the surface roughness (Rmax) of the press-molding die is about 70Å, and as a result of observation with an optical microscope, minute glass pieces, foreign matter, or dust adheres to the molding surface. No fine scratches were generated, and the highly precise surface shape was not changed. The molded optical glass lens had a surface precision within 2 Newton rings, within 1/5 ass, and a surface roughness of 0.01 μm. The optical performance thereof was extremely excellent and the product yield was also very good. In addition, the temperature at which the optical glass is released from the press-molding die has been about 370 ° C in the past, but in the case of the press-molding method of the present invention, the temperature can be released at 410 ° C, which is higher than the conventional temperature, and mass productivity is greatly improved. It has become possible to improve.
（実施例２） 超硬合金（WC−5TiC−8Co）を実施例１と同様の形状に
加工し、成形面３および４を超微細なダイヤモンド粉末
でラッピングし、約１時間で表面の最大粗さ（Rmax）か
約60Åの鏡面にした。鏡面となった成形面３および４
に、スパッタ法で白金−イリジウム−オスミウム合金
（Pt−Ir−Os）の薄膜を被覆し、光学ガラス素子の成形
用上型１および下型２を得た。(Example 2) A cemented carbide (WC-5TiC-8Co) was processed into the same shape as in Example 1, and the molding surfaces 3 and 4 were lapped with ultrafine diamond powder, and the maximum surface roughness was obtained in about 1 hour. (Rmax) or a mirror surface of about 60Å. Molded surfaces 3 and 4 that became mirror surfaces
Then, a platinum-iridium-osmium alloy (Pt-Ir-Os) thin film was coated thereon by a sputtering method to obtain an upper mold 1 and a lower mold 2 for molding an optical glass element.
分子量約400のパーフロロアルキルポリエーテル（商品
名デムナム、ダイキン工業製）の10重量％フレオン溶液
を成形用上型１および下型２に噴霧して成形用上型１お
よび下型２に10分子層程度の膜厚のパーフロロアルキル
ポリエーテル薄層６を形成した状態で実施例１と同様に
シリカ（SiO2）30重量％、酸化バリウム（BaO）50重量
％、ホウ酸（B2O3）15重量％、残部が微量成分からなる
ホウケイ酸バリウムガラス塊５を、第１図のように730
℃に昇温された上述のプレス成形用型１および２を用い
て、プレス圧力40kg/cm2、プレス時間１分、窒素雰囲気
中でプレス成形した。成形レンズはそのまま冷却し610
℃で上下の型と離型し、直ちに徐冷炉にいれて徐冷し40
0℃で取り出した。A 10 wt% Freon solution of perfluoroalkyl polyether (trade name: Demnum, manufactured by Daikin Industries, Ltd.) having a molecular weight of about 400 is sprayed onto the upper mold 1 and the lower mold 2 for molding to obtain 10 molecules in the upper mold 1 and the lower mold 2. In the state where the perfluoroalkylpolyether thin layer 6 having a thickness of about one layer is formed, 30% by weight of silica (SiO 2 ), 50% by weight of barium oxide (BaO), and boric acid (B 2 O 3 ) are used as in Example 1. ) Barium borosilicate glass block 5 consisting of 15% by weight and the balance being trace components is used as shown in FIG.
Using the above-mentioned press-molding dies 1 and 2 heated to 0 ° C., press-molding was performed in a nitrogen atmosphere at a pressing pressure of 40 kg / cm 2 for a pressing time of 1 minute. Molded lens is cooled as it is 610
Remove from the upper and lower molds at ℃ and immediately put in a slow cooling furnace to cool slowly.
It was taken out at 0 ° C.
本発明の光学ガラス素子のプレス成形方法を施した場
合、プレス成形用型の表面粗さ（Rmax）は約70Åであ
り、光学顕微鏡で観察した結果その成形面に微小なガラ
ス片、異物、あるいはゴミ等の付着や微細なキズも発生
していなかったと共に、高精度な面形状も変化していな
かった。そして成形した光学ガラスレンズは面精度ニュ
ートンリング２本以内、アス５分の１本以内、面粗さ0.
01μｍであり、その光学性能は極めて優れていると共に
製品歩留りも非常に良好であった。また光学ガラスがプ
レス成形用型から離型する温度は従来約500℃であった
が、本発明のプレス成形方法の場合610℃と従来より高
い温度で離型することができ、量産性を大幅に向上させ
ることが可能になった。When the optical glass element press-molding method of the present invention is applied, the surface roughness (Rmax) of the press-molding die is about 70Å, and as a result of observation with an optical microscope, minute glass pieces, foreign matter, or No dust or fine scratches were generated, and the highly precise surface shape was not changed. And the molded optical glass lens has surface accuracy within 2 Newton rings, within 1/5 ass, and surface roughness of 0.
It was 01 μm, and its optical performance was extremely excellent and the product yield was also very good. Further, the temperature at which the optical glass is released from the press-molding die has been about 500 ° C in the past, but in the case of the press-forming method of the present invention, the temperature can be released at 610 ° C, which is higher than the conventional temperature, and mass productivity is greatly improved. It has become possible to improve.
なお本発明の光学ガラス素子のプレス成形方法は、表面
に有機物の薄層を形成したプレス成形用型を用いて光学
ガラス塊を熱間でプレス成形して光学ガラス素子を作製
することを特徴とするものであり、プレス成形用型の材
質、ガラスの種類、有機物の種類、有機物の薄層の厚
み、有機物の薄層の形成方法、其の他のプレス成形条件
等は本実施例に限定されるものではない。The optical glass element press-molding method of the present invention is characterized in that an optical glass element is produced by hot press-molding an optical glass block using a press-molding die having a thin layer of an organic material formed on its surface. The material of the press mold, the type of glass, the type of organic substance, the thickness of the thin layer of the organic substance, the method for forming the thin layer of the organic substance, the other press molding conditions, etc. are limited to this embodiment. Not something.
発明の効果 以上説明したように、本発明の光学ガラス素子のプレス
成形方法は、表面に有機物の薄層を形成したプレス成形
用型を用いて光学ガラス塊を熱間でプレス成形して光学
ガラス素子を作製することから、光学ガラス塊とプレス
成形用型とが直接接触しないで、また光学ガラス塊とプ
レス成形用型との間に存在する有機物の薄層によって光
学ガラス塊とプレス成形用型との表面エネルギーが大幅
に低下するため、非常に高い面精度で加工した成形用型
のプレス面には微小なガラス片あるいは異物等が付着し
なくなり、また光学ガラスの離型性が大幅に向上するこ
とがわかる。EFFECTS OF THE INVENTION As described above, the method for press-molding an optical glass element of the present invention is an optical glass in which an optical glass block is hot-pressed using a press-molding die having a thin layer of an organic material formed on the surface thereof. Since the element is produced, the optical glass gob and the press molding die do not come into direct contact with each other, and the optical glass gob and the press molding die are formed by a thin layer of an organic substance existing between the optical glass gob and the press molding die. Since the surface energy of and is significantly reduced, minute glass pieces or foreign substances do not adhere to the press surface of the molding die processed with extremely high surface accuracy, and the releasability of optical glass is greatly improved. I understand that
以上のことから、本発明によって高精度な光学ガラス素
子の大量生産が可能になり、生産性の向上と製造コスト
の低減に著しい効果がある。From the above, the present invention enables high-precision mass production of optical glass elements, and has a remarkable effect in improving productivity and reducing manufacturing cost.
第１図はプレス成形用型上に有機物の薄層を形成してい
ることを表わす説明用概略図である。 １……上型、２……下型、3,4……成形面、５……ガラ
ス塊、６……有機物の薄層。FIG. 1 is an explanatory schematic diagram showing that a thin layer of an organic material is formed on a press molding die. 1 ... Upper mold, 2 ... Lower mold, 3,4 ... Molding surface, 5 ... Glass lump, 6 ... Thin layer of organic material.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 梅谷 誠 大阪府門真市大字門真1006番地 松下電器 産業株式会社内 (56)参考文献 特開 昭63−35423（ＪＰ，Ａ) 特開 昭48−100317（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Makoto Umeya 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) Reference JP-A-63-35423 (JP, A) JP-A-48-100317 (JP, A)
Claims (1)
ンからなる薄層を表面に形成したプレス成形用型を用い
て光学ガラス塊を熱間でプレス成形する光学ガラス素子
のプレス成形方法。1. A method of press-molding an optical glass element, which comprises hot-pressing an optical glass block using a press-molding die having a thin layer of halogenated hydrocarbon or fluorocarbon formed on the surface thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63093746A JPH0717391B2 (en) | 1988-04-15 | 1988-04-15 | Optical glass element press molding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63093746A JPH0717391B2 (en) | 1988-04-15 | 1988-04-15 | Optical glass element press molding method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01264937A JPH01264937A (en) | 1989-10-23 |
| JPH0717391B2 true JPH0717391B2 (en) | 1995-03-01 |
Family
ID=14090989
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63093746A Expired - Fee Related JPH0717391B2 (en) | 1988-04-15 | 1988-04-15 | Optical glass element press molding method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0717391B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2739916B2 (en) * | 1992-02-18 | 1998-04-15 | キヤノン株式会社 | Glass blank for manufacturing optical element and method for manufacturing optical element using the same |
| JP2003026425A (en) * | 2001-07-11 | 2003-01-29 | Matsushita Electric Ind Co Ltd | Method for molding optical element having fine irregularities and method for manufacturing mold for molding having fine irregularities |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6335423A (en) * | 1986-07-25 | 1988-02-16 | Minolta Camera Co Ltd | Method for molding glass lens |
-
1988
- 1988-04-15 JP JP63093746A patent/JPH0717391B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01264937A (en) | 1989-10-23 |
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