JPH03242335A - Member for molding optical element - Google Patents
Member for molding optical elementInfo
- Publication number
- JPH03242335A JPH03242335A JP3575890A JP3575890A JPH03242335A JP H03242335 A JPH03242335 A JP H03242335A JP 3575890 A JP3575890 A JP 3575890A JP 3575890 A JP3575890 A JP 3575890A JP H03242335 A JPH03242335 A JP H03242335A
- Authority
- JP
- Japan
- Prior art keywords
- molding
- alloy
- mold
- optical element
- glass
- 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
- 238000000465 moulding Methods 0.000 title claims abstract description 27
- 230000003287 optical effect Effects 0.000 title claims description 18
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 13
- 239000000956 alloy Substances 0.000 claims abstract description 13
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 6
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 5
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 abstract description 10
- 239000010408 film Substances 0.000 abstract description 9
- 239000011248 coating agent Substances 0.000 abstract description 7
- 238000000576 coating method Methods 0.000 abstract description 7
- 230000003647 oxidation Effects 0.000 abstract description 5
- 238000007254 oxidation reaction Methods 0.000 abstract description 5
- 239000010409 thin film Substances 0.000 abstract description 5
- 230000007797 corrosion Effects 0.000 abstract description 3
- 238000005260 corrosion Methods 0.000 abstract description 3
- 229910000990 Ni alloy Inorganic materials 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract description 2
- 230000001590 oxidative effect Effects 0.000 abstract description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 2
- 229910052593 corundum Inorganic materials 0.000 abstract 2
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 2
- 229910002061 Ni-Cr-Al alloy Inorganic materials 0.000 abstract 1
- 239000011521 glass Substances 0.000 description 17
- 229910018487 Ni—Cr Inorganic materials 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 239000005304 optical glass Substances 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- 229910052684 Cerium Inorganic materials 0.000 description 1
- 229910052776 Thorium Inorganic materials 0.000 description 1
- 229910002056 binary alloy Inorganic materials 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 229910002058 ternary alloy Inorganic materials 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- 229910052727 yttrium Inorganic materials 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
- 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
- C03B2215/12—Ceramics or cermets, e.g. cemented WC, Al2O3 or TiC
-
- 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
- C03B2215/20—Oxide ceramics
-
- 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
- C03B2215/30—Intermediate layers, e.g. graded zone of base/top material
- C03B2215/32—Intermediate layers, e.g. graded zone of base/top material of metallic or silicon material
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
Abstract
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、光学素子成形用部材に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to a member for molding optical elements.
近年、レンズ、プリズム等の光学素子を製造する方法と
して、研削、研磨等を行わずに高い面精度の一対の成形
用型間に加熱軟化した光学素子のガラス素材を挿入配置
し、これを加圧するだけで、光学素子を得る押圧成形が
行われている。In recent years, as a method for manufacturing optical elements such as lenses and prisms, a glass material for optical elements that has been heated and softened is inserted between a pair of molds with high surface precision without grinding or polishing, and then processed. Press molding is used to obtain optical elements simply by pressing.
従来、この押圧成形で用いる光学素子成形用型。Traditionally, molds for molding optical elements are used in this press molding.
ガラス保持用部材等の光学素子成形用部材は、例えば特
開昭６４−６１３２７号公報や特開昭６２−１８５８５
１号公報に開示されるように、Ｎ１−Ｃｒ 、Ｎｉ −
Ｖ等の２元合金からなる材料を素材としている。ここに
、合金を用いているのは、光学素子成形用部材が高温の
加熱軟化したガラス素材に接触するので、高温に耐え得
るようにするためである。Optical element molding members such as glass holding members are disclosed in, for example, JP-A-64-61327 and JP-A-62-18585.
As disclosed in Publication No. 1, N1-Cr, Ni-
The material is made of a binary alloy such as V. The reason why the alloy is used here is to make it able to withstand high temperatures since the optical element molding member comes into contact with a glass material that has been softened by heating at high temperatures.
しかし、上記従来の光学素子成形用部材は、高温酸化雰
囲気中で表面にＣｒ２Ｏ２やＶ、Ｏ３の酸化物の被膜が
形成されているので、低融点硝材の成形には耐え得るが
、高融点硝材では、６００°Ｃ〜８００°Ｃの高温にさ
らされるので、内部酸化の進行や酸化被膜の剥離等を生
じ、寿命が著しく低下し、コスト高になってしまうとい
う問題があった。However, since the above-mentioned conventional optical element molding members have a film of Cr2O2, V, and O3 oxides formed on their surfaces in a high-temperature oxidizing atmosphere, they can withstand molding of low-melting point glass materials; In this case, since it is exposed to high temperatures of 600° C. to 800° C., internal oxidation progresses, the oxide film peels off, etc., resulting in a significant decrease in life span and high cost.
本発明は、かかる従来の問題点に鑑みてなされたもので
、６００℃以上の高温下でも部材表面に何ら変化がなく
、長時間の使用にも耐え得る光学素子成形用部材を提供
することを目的とする。The present invention has been made in view of such conventional problems, and aims to provide an optical element molding member that does not undergo any change in the surface of the member even at high temperatures of 600°C or higher and can withstand long-term use. purpose.
上記目的を達成するために、本発明は、少なくとも表面
部をＮｉ とＣｒとＡｌ２との合金で形成するとともに
、その最表面を酸化させることによりＡ ｌ ｚ Ｏｘ
被膜を形成して光学素子成形用部材を構成した。In order to achieve the above object, the present invention forms at least the surface portion with an alloy of Ni, Cr, and Al2, and oxidizes the outermost surface to form Al z Ox
A film was formed to constitute an optical element molding member.
本発明において、Ｎｉ 、ＣｒおよびＡｌの成分比は、
Ｃｒが１５〜３０重量％、Ａｌ２が２〜１６重景％およ
び残部がＮｉ というものが好ましい。In the present invention, the component ratio of Ni, Cr and Al is as follows:
It is preferable that Cr is 15 to 30% by weight, Al2 is 2 to 16% by weight, and the balance is Ni.
上記構成の本発明の光学素子成形用部材においては、表
面がＡ Ｉ！ ｚ Ｏｓ被膜で覆われているので、熱的
および化学的にも安定で、しかも合金の酸化速度がＣｒ
、０．やＶ、Ｏ，よりも遅い、また、ＮｉＣｒ−Ａｌ！
、３元合金としたことでＡ １２０ ｘ被膜の密着性も
高く、合金からＡ Ａ ｚ Ｏｓ被膜が剥離することは
ほとんどない。したがって、本発明の光学素子成形用部
材は、高温にさらされた状態でも劣化せず、しかもＡＮ
工Ｏ１が熱的および化学的に安定なために、ガラスが高
い圧力で接触してもガラスの融着を生じることがなく、
長時間の使用に耐えることができる。In the optical element molding member of the present invention having the above configuration, the surface is A I! z Because it is covered with an Os film, it is thermally and chemically stable, and the oxidation rate of the alloy is lower than that of Cr.
, 0. , V, O, and NiCr-Al!
By using a ternary alloy, the adhesion of the A 120 x film is high, and the A z Os film hardly peels off from the alloy. Therefore, the optical element molding member of the present invention does not deteriorate even when exposed to high temperatures, and has an AN
Because O1 is thermally and chemically stable, it does not cause glass fusion even when glasses come into contact with each other under high pressure.
Can withstand long-term use.
（第１実施例）
第１図は、本実施例の光学素子成形用型を示すもので、
Ｗ Ｃ−Ｎ ｉ系合金からなる型基材１の加工面（成形
基礎面）ｌａに、Ｃｒ含有量が２０重量％、Ａ２含有量
が２重量％および残部がＮｉで構成されたＮｉ−Ｃｒ−
Ａｌ１合金薄膜２をスパッタリング法により０．５μ−
の厚さで形成した後、これを大気中で１２００°Ｃに加
熱して成形面（最表面）にＡ ｌ ｚ Ｏ３被膜３を形
成し、成形用型を得た。(First Example) Figure 1 shows a mold for molding an optical element according to this example.
Ni-Cr containing 20% by weight of Cr, 2% by weight of A2, and the balance being Ni is applied to the processed surface (forming base surface) la of the mold base material 1 made of W C-Ni alloy. −
Al1 alloy thin film 2 was deposited at 0.5 μ- by sputtering method.
This was heated to 1200° C. in the atmosphere to form an Al z O 3 coating 3 on the molding surface (outermost surface) to obtain a mold.
上記成形用型を用いて、ＳＫＩに対し５０００シヨント
の連続成形を行い、その後の成形用型の表面及び成形レ
ンズ面を観察したところ、成形用型の表面にはガラスの
融着はなく、変化はなかった。また、５０００シヨツト
の成形レンズもほぼ良好な面となっていた。Using the above mold, continuous molding was performed for 5,000 shots of SKI, and when the surface of the mold and the molded lens surface were observed, there was no fusion of glass on the surface of the mold, and there was no change. There was no. Furthermore, the 5000 shot molded lens also had a generally good surface.
これに対し、型基材１の加工面１ａにＮ ｉ −Ｃｒ〜
Ａ１合金薄膜２の代わりとしてＮｉ Ｃｒ合金薄膜を
スパッタリング法により０．５μ−の厚さで形成した後
、大気中で６００°Ｃに加熱して成形面にＣｒ工Ｏ８被
膜を形成した従来の成形用型を用いて、ＳＫＩに対し５
０００シヨツトの連続成形を行ったところ、成形面の表
面粗さがＲｍａｘで０．２０μ−以上となってしまい、
５０００シヨツトの成形レンズ中２０００個にくもりが
生じて不良となってしまった。On the other hand, on the processed surface 1a of the mold base material 1, N i -Cr~
Conventional molding in which a Ni-Cr alloy thin film was formed with a thickness of 0.5 μm by sputtering as a substitute for the A1 alloy thin film 2, and then heated to 600°C in the air to form a Cr-O8 coating on the molding surface. 5 for SKI using a mold
When 000 shots were continuously molded, the surface roughness of the molded surface was 0.20μ or more at Rmax.
Out of 5,000 shots of molded lenses, 2,000 were defective due to cloudiness.
（第２実施例）
第１実施例と同様の光学素子成形用型において、型基材
をＮｉ−Ｃｒ−Ａｌ２合金により形成し、加工面を成形
面として加工した後、大気中で１２００°Ｃに加熱して
成形用型最表面にＡ ｔ２ ｚ Ｏｓ被膜を形成し、成
形用型を得た。(Second Example) In a mold for molding an optical element similar to the first example, the mold base material was formed from a Ni-Cr-Al2 alloy, and the processed surface was processed as a molding surface, and then heated at 1200°C in the atmosphere. A mold was obtained by heating to form an A t2 z Os coating on the outermost surface of the mold.
本実施例の成形用型を用いて、５ＫＩＩに対し５０００
シヨツトの連続成形を行ったところ、成形用型の成形面
にガラスの融着はなく、成形用型に何ら変化はなかった
。また、５０００シヨツトの成形レンズもほぼ良好な面
となっていた。Using the mold of this example, 5000 for 5KII
When the shot was continuously molded, there was no melting of the glass on the molding surface of the mold, and there was no change in the mold. Furthermore, the 5000 shot molded lens also had a generally good surface.
（第３実施例）
第２図は、本実施例のガラス保持用部材を示すもので、
加熱軟化したガラス素材４を保持するガラス保持用部材
５は、Ｃｒ含有量が２０重量％、Ａ２含有量が２重量％
および残部がＮｌで構成された合金で形成されており、
大気中にて１０００°Ｃで加熱酸化させて、最表面にＡ
ｆｆｉア０３被膜６が形成されている。(Third Example) Figure 2 shows the glass holding member of this example.
The glass holding member 5 that holds the heat-softened glass material 4 has a Cr content of 20% by weight and an A2 content of 2% by weight.
and the remainder is formed of an alloy composed of Nl,
Oxidize by heating at 1000°C in the air to form A on the outermost surface.
An ffi 03 coating 6 is formed.
本実施例のガラス保持用部材５を用いて、比較的軟化点
が高いＬａＫｌＢに対し連続成形を行う際に１００００
回使用したところ８００°Ｃの高温下で長時間使用した
にも拘らず、表面に何ら変化はなく、ガラスと接触する
内径が酸化の進行によって、変化することがなかった。Using the glass holding member 5 of this example, when continuous molding is performed on LaKlB, which has a relatively high softening point,
Even though it was used several times at a high temperature of 800°C for a long time, there was no change in the surface, and the inner diameter in contact with the glass did not change due to the progress of oxidation.
なお、上記各実施例において、Ｎｉ−Ｃｒ −Ａ１合金
にＬａ、Ｃｅ、Ｙ、Ｔｈ、Ｃａ、Ｈｆまたはこれらの酸
化物を０．１〜数重量％、好ましくは０．５〜１重量％
添加することにより、さらに耐高温腐食性を向上させ、
またＡ ｌ ｔ Ｏｓ被膜の密着性を向上させることが
できる。In each of the above examples, 0.1 to several weight %, preferably 0.5 to 1 weight % of La, Ce, Y, Th, Ca, Hf or oxides thereof are added to the Ni-Cr-A1 alloy.
By adding it, the high temperature corrosion resistance is further improved.
Furthermore, the adhesion of the Al t Os film can be improved.
以上のように、本発明の光学素子成形用部材によれば、
耐熱性、耐食性および耐酸化性に優れ、かつガラスとの
離型性にも優れており、光学ガラス素子の連続成形にお
いて高温下で使用することを要求される部材や、加熱軟
化されたガラスが接触する部材に対して長寿命化を図る
ことができ、光学ガラス素子を安価に製造することがで
きる。As described above, according to the optical element molding member of the present invention,
It has excellent heat resistance, corrosion resistance, and oxidation resistance, as well as excellent mold releasability from glass, and is suitable for parts that are required to be used at high temperatures in continuous molding of optical glass elements, and for heat-softened glass. It is possible to extend the life of the contacting members, and it is possible to manufacture optical glass elements at low cost.
第１図は本発明の第１実施例の光学素子成形用型を示す
縦断面図、第２図は本発明の第３実施例のガラス保持用
部材を示す縦断面図である。
１・・・型基材
２−Ｎｉ−Ｃｒ ＡＮ合金薄膜
３．６・・・Ａｌ□Ｏ８被膜
５・・・ガラス保持用部材FIG. 1 is a vertical cross-sectional view showing a mold for molding an optical element according to a first embodiment of the present invention, and FIG. 2 is a vertical cross-sectional view showing a glass holding member according to a third embodiment of the present invention. 1... Type base material 2-Ni-Cr AN alloy thin film 3.6... Al□O8 coating 5... Glass holding member
Claims (1)
形成するとともに、その最表面を酸化させることにより
Ａｌ＿２Ｏ＿３被膜を形成したことを特徴とする光学素
子成形用部材。(1) An optical element molding member characterized in that at least the surface portion thereof is formed of an alloy of Ni, Cr, and Al, and the outermost surface thereof is oxidized to form an Al_2O_3 film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3575890A JPH03242335A (en) | 1990-02-16 | 1990-02-16 | Member for molding optical element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3575890A JPH03242335A (en) | 1990-02-16 | 1990-02-16 | Member for molding optical element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03242335A true JPH03242335A (en) | 1991-10-29 |
Family
ID=12450743
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3575890A Pending JPH03242335A (en) | 1990-02-16 | 1990-02-16 | Member for molding optical element |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03242335A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009096682A (en) * | 2007-10-18 | 2009-05-07 | Olympus Corp | Method for producing optical element molding die, method for processing optical element molding die, and optical element molding die processed thereby |
| JPWO2015087429A1 (en) * | 2013-12-12 | 2017-03-16 | Hoya株式会社 | Polishing glass optical element blank molding die, polishing glass optical element blank manufacturing method, and optical element manufacturing method |
-
1990
- 1990-02-16 JP JP3575890A patent/JPH03242335A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009096682A (en) * | 2007-10-18 | 2009-05-07 | Olympus Corp | Method for producing optical element molding die, method for processing optical element molding die, and optical element molding die processed thereby |
| JPWO2015087429A1 (en) * | 2013-12-12 | 2017-03-16 | Hoya株式会社 | Polishing glass optical element blank molding die, polishing glass optical element blank manufacturing method, and optical element manufacturing method |
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