JPH02124743A - Optical glass for precision press molding - Google Patents
Optical glass for precision press moldingInfo
- Publication number
- JPH02124743A JPH02124743A JP27649288A JP27649288A JPH02124743A JP H02124743 A JPH02124743 A JP H02124743A JP 27649288 A JP27649288 A JP 27649288A JP 27649288 A JP27649288 A JP 27649288A JP H02124743 A JPH02124743 A JP H02124743A
- Authority
- JP
- Japan
- Prior art keywords
- glass
- optical glass
- refractive index
- optical
- press molding
- 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.)
- Granted
Links
- 239000005304 optical glass Substances 0.000 title claims abstract description 18
- 238000000465 moulding Methods 0.000 title abstract description 11
- 239000006185 dispersion Substances 0.000 claims abstract description 8
- 239000011521 glass Substances 0.000 abstract description 37
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 abstract 2
- ZKATWMILCYLAPD-UHFFFAOYSA-N niobium pentoxide Chemical compound O=[Nb](=O)O[Nb](=O)=O ZKATWMILCYLAPD-UHFFFAOYSA-N 0.000 abstract 2
- FUJCRWPEOMXPAD-UHFFFAOYSA-N Li2O Inorganic materials [Li+].[Li+].[O-2] FUJCRWPEOMXPAD-UHFFFAOYSA-N 0.000 abstract 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 1
- 229910052593 corundum Inorganic materials 0.000 abstract 1
- XUCJHNOBJLKZNU-UHFFFAOYSA-M dilithium;hydroxide Chemical compound [Li+].[Li+].[OH-] XUCJHNOBJLKZNU-UHFFFAOYSA-M 0.000 abstract 1
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 1
- 230000003287 optical effect Effects 0.000 description 11
- 239000000126 substance Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 7
- 239000000203 mixture Substances 0.000 description 6
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 3
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 239000005303 fluorophosphate glass Substances 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 1
- 244000025254 Cannabis sativa Species 0.000 description 1
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-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
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000004031 devitrification Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000019253 formic acid Nutrition 0.000 description 1
- 238000007496 glass forming Methods 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000005365 phosphate glass Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 238000004017 vitrification Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/062—Glass compositions containing silica with less than 40% silica by weight
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/062—Glass compositions containing silica with less than 40% silica by weight
- C03C3/064—Glass compositions containing silica with less than 40% silica by weight containing boron
- C03C3/066—Glass compositions containing silica with less than 40% silica by weight containing boron containing zinc
Abstract
Description
【発明の詳細な説明】
「産業上の利用分野］
本発明は比較的低温でプレス成形可能な精密プレスレン
ズ用の光学ガラスに関する。DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to an optical glass for precision press lenses that can be press-formed at relatively low temperatures.
［従来の技術］
従来同じような光学イ１！数を持つものとして、中圧１
１７ 宇（ｌｊ分散クりプ（ｎｄ＝１．５３以上、ｙｄ
＝５９．０以上）の光学ガラスが存在する。またプレス
成形用のガラスとしてｖ４Ｍ Ｉ！系ガラス（特開昭５
８−７９８３９号公報、特開超６０−１２２７４９号公
報、欧州特許第１９３４２号明細出、Ｄ １１！ ）、
フッホウ酸塩系ガラス（特開貼５９−１４６９５２号公
報参照）、フルオロ燐酸塩系ガラＸ （？、？開ｆ１４
５６−５９ Ｇ ４１号公報、特ｎｌ！ ＩＲｆ ５６
１４９３４３号公報、特開詔５８−２１７４５１号公９
１ ’Ａ照）が知られている。[Conventional technology] Same optical system as before! As something with a number, medium pressure 1
17 u (lj dispersion clip (nd = 1.53 or more, yd
= 59.0 or more) exists. In addition, v4M I! is used as glass for press molding. type glass (Unexamined Japanese Patent Publication No. 5
8-79839, JP-A-60-122749, European Patent No. 19342, D 11! ),
Fluoroborate glass (see JP-A No. 59-146952), fluorophosphate glass
56-59 G No. 41, special nl! IRf 56
Publication No. 149343, Japanese Patent Application Publication No. 58-217451 Publication No. 9
1 'A sho) is known.
［発明が解決しようとするｓｕコ
しかし従来よりある中屈折率低分散タイプ（「１ｄ＝１
．５３以上、ｙ ｄ ＝ ５９． ＯＬｕ上） ｆ）
光学ガラスは、屈伏１８度（Ａｔ）が６００℃もしくは
それ［ズ上のものしか存在せず、そのプレスｌ−度は６
５０°Ｃを超える高い１度でなければ成形することが出
来なかった。精密プレス成形の公知の望材等では、プレ
ス成形温度が高１ｊ！になるとへ’Ｉ Ｎの酸化等の問
題が起こり、面１ｒ１度の保持が難しくレンズの１産）
：は遺さない。そのためプレスされるガラスは可能な限
り低い温度で成形されるのが望ましい。これらの間駈を
解決するためとして 上記プレス成形用ガラスの公開公
報では、ガラス形成酸化物に情酸、及びホウ酸を選んで
いる。しかし、前記の燗ＰＪ１塩系ガラス（特開昭５８
−７９８３９号公報、特開昭Ｇｏ−１２２７４９号公報
、欧州持訂第１９３４２号明細書）等では、低軟化点ガ
ラス組成が・ｊ々されているものの、本特許における尤
′Ｉ恒数を持つガラスが見当らず、また釦を含んでいる
ガラスも上記特許中に兄られるが、船を含むと鎗の挿発
鞠が＋（！Ｉ ＄イに１１着し面精度の保持等に問題が
生じる。さらに化学的耐久性の点で不十分なものもある
。[The present invention aims to solve the problems of the conventional medium refractive index and low dispersion type (“1d=1
．． 53 or more, y d = 59. on OLu) f)
Optical glass only exists with a yield strength (At) of 600°C or above, and its press l-degree is 600°C.
Molding could only be done at a high temperature exceeding 50°C. The press molding temperature is 1J high for known materials that are suitable for precision press molding! When this happens, problems such as oxidation of IN occur, making it difficult to maintain the 1r 1 degree surface of the lens)
: is not left behind. Therefore, it is desirable that the glass to be pressed be formed at the lowest possible temperature. In order to resolve these discrepancies, the above-mentioned publication on glass for press molding selects formic acid and boric acid as glass-forming oxides. However, the above-mentioned PJ1 salt-based glass (Japanese Patent Application Laid-open No. 58
-79839, Japanese Patent Application Laid-Open No. 122749, European Patent Revision No. 19342), etc., the low softening point glass composition is described as ・j, There is no glass to be found, and the glass that contains the button is also mentioned in the above patent, but if the ship is included, the insertion of the spear will be + (! .Furthermore, some of them are insufficient in terms of chemical durability.
フッホウＩ′１１！塩系ガラス〈特開昭５９−１４６９
５２号公報）、フルオロリン酸塩系ガラス（特開昭５６
−５９６／ｌ １号公報、特開昭５６−１４９ ：３４
３号公報、特開貼５８−２１７４５１号公１１ｉ）等で
は、ガラス組成にフッ素を含んでいるが、フッ素の導入
は、低ｌ−化及び低分散化には有利であるが、ガラスｆ
８融時における安定性に欠は均質なガラスが１３）られ
にくく、プレスンΩ度におけるフ・ソ索の１１発による
＋ｒｔ Ｆ４、環境等に問題が生じやすい。Fuhoo I'11! Salt-based glass〈JP-A-59-1469
No. 52), fluorophosphate glass (Japanese Patent Laid-open No. 56
-596/l Publication No. 1, JP-A-56-149:34
3, JP-A No. 58-217451, 11i), etc., the glass composition contains fluorine. Although the introduction of fluorine is advantageous for lowering l- and dispersion, the glass f
The lack of stability at 8 melting times makes it difficult to create a homogeneous glass (13), which tends to cause problems in +rt F4, environment, etc. due to 11 shots of F/S cables at presun Ω degrees.
さらにＦ記特許輯成中には燐酸塩系ガラスに見られたと
同ｔｌ ｆｔ１を含むものもあり、プレス用ガラスとし
てはＪ当ではない。Furthermore, some of the patents under construction include tl ft1, which is the same as that found in phosphate glasses, and is not appropriate as a press glass.
促って本発明の第１の目的は、比較的低い１度（５５０
℃以下）で精密プレスが実施される精密プレス用先学ガ
ラスを提供することにある。It is therefore a first object of the present invention to achieve a relatively low 1 degree (550
The purpose of the present invention is to provide a precision press glass that can be precision pressed at temperatures below ℃.
また本発明の第２の目的は屈折率（ｎｄ）１５３〜Ｉ、
６２、アツベ数（νｄ）５９．０〜６４．０という中屈
折率低分散の光学ガラスを提供することにある。Further, the second object of the present invention is a refractive index (nd) of 153 to I,
62, an object of the present invention is to provide an optical glass having a medium refractive index and low dispersion having an Abbe number (vd) of 59.0 to 64.0.
課題を解決するための手段
本発明者等は以上のような従来の光学ガラス及びプレス
成形用光学ガラスの諸欠点をかんがみて、種／／考察研
究した結果、 Ｐ２０ｑ、ＺｎＯ及び／又はＢ ａ Ｏ
及び／又はＳｒＯ及び／又はＣａ、 Ｏ及び／又はＭｇ
ｏを必須とするガラスｉｆｆ成の光学ガラスが、中屈折
率低分散タイプの光学ガラスとほぼ同等の光学恒数を有
し、かつこれよりも低い温度においてプレス成形でき、
型ｔイへの影響も殆どないことを見い出し本発明に到達
したものである。Means for Solving the Problems The inventors of the present invention took into consideration the various drawbacks of conventional optical glasses and optical glasses for press molding as described above, and as a result of conducting various studies, found that P20q, ZnO and/or B a O
and/or SrO and/or Ca, O and/or Mg
An optical glass with a glass iff composition in which o is essential has an optical constant almost equivalent to a medium refractive index low dispersion type optical glass, and can be press-formed at a temperature lower than this,
The present invention was achieved by discovering that there is almost no effect on type t.
すなわち本発明の光学ガラスは、所定の組成範囲内にお
いて上記特許のプレス成形用光学ガラスよりも、安定性
、化学的耐久性、耐候性、溶融性が優れており、従来の
光学ガラスと同様に級え、かつ屈伏温度（ＡＬ）が低い
のでプレス成形１表研削またはＩＩＩＴｒｆ！を必要と
しない精密プレスレンズ用光学ガラスとしてｌ＆通であ
るという結論に達した。In other words, the optical glass of the present invention has better stability, chemical durability, weather resistance, and meltability than the optical glass for press molding of the above-mentioned patent within a predetermined composition range, and has the same properties as conventional optical glasses. Because of its high quality and low yielding temperature (AL), it can be press molded with one surface grinding or IIITrf! We have come to the conclusion that this is an excellent optical glass for precision press lenses that does not require any process.
すなわち本発明を重Ｉ％で示すと
ＰｚＯｓ ４５〜６２重量％（以下％で；＋′−
。That is, if the present invention is expressed in weight I%, PzOs is 45 to 62% by weight (hereinafter expressed as %; +'-
.
す）
Ｂ２０１ ０〜７ ％
Ｚ ｎ Ｏｌ ５−３５ ％
ＢａＯ０−３０％
ＳｒＯ０−１５％
ＣａＯＯ〜１０ ％
Ｍ ｇ Ｑ Ｑ〜 ３，５ ％（ｆ！シ、
Ｚ ｎ ○ ＋ ＢａＯ＋Ｓ ｒｏ＋ｃａ。B201 0-7% ZnOl 5-35% BaO0-30% SrO0-15% CaOO~10% M g Q Q~ 3.5% (f!shi,
Z n ○ + BaO + S ro + ca.
＋！ｖｌ ｇ ｏ の 合 檄２８〜４９
％
Ｌｌ、−００〜 ５ ％
Ａ １ ｚＯＩＯ〜 ９ ％
Ｎｂパ〕５ ０〜１，５ ％
Ｚｒ’Ｏｐ Ｏ−１，０％
からなるｉｌｌ成を何している。+! Vl go's combination 28-49
% Ll, -00~5% A1zOIO~9% NbPa]50~1,5% Zr'Op O-1,0% What is the ill composition made of?
本発明に係わる光学ガラスの凸成分範囲をＬ記のように
限定した理由はυこのとおりである。The reason why the convex component range of the optical glass according to the present invention is limited as shown in L is as follows.
Ｐ２Ｏ５はガラスの網目を構成するｔ成分であり、ガラ
スの安定化、また屈伏温度（Ａし）の低渇度化、さＣ）
に分散の低分１１＆化に有効である。しかし４５■、よ
り少ないとガラスが不安定になり、６２％より多くなる
と化学的耐久性が悪くなる。P2O5 is a t-component that makes up the glass network, and is used to stabilize the glass, lower the yielding temperature (A), and reduce the dryness of the glass (C).
It is effective in reducing the dispersion. However, if it is less than 45%, the glass becomes unstable, and if it is more than 62%, the chemical durability deteriorates.
Ｂ ｊＯＳはＰ ２０ ｒ、と同様ガラスの網［１を構
成し屈伏１４度（Ａｔ ｌの低ン息度化に有効である。B jOS constitutes a glass net [1] similar to P 20 r, and is effective in reducing the yield of 14 degrees (At l).
しかし７％より多くなると化学的耐久性が４［常に悪く
なる。However, when the amount exceeds 7%, the chemical durability becomes 4 [always worse].
７ｒ１０及びＢａＯ及びＳｒＯ及びＣａＯ及びＭｇＯは
、屈折率の調整、化学的耐久性の向上、さらに屈伏温度
（Ａｔ）の低温度化に有効な成分であるが、その＆ｌｌ
が２８％より少ないと所定の光学ＩＩ数が１：１られす
、４９％より多くなるとガラスの安定性が悪くなる。7r10, BaO, SrO, CaO, and MgO are effective components for adjusting the refractive index, improving chemical durability, and lowering the yield temperature (At).
If it is less than 28%, the predetermined optical II number will be 1:1, and if it is more than 49%, the stability of the glass will deteriorate.
Ｚ ｎ Ｏは池の成分に比ベガラスの屈伏温度（Ａし）
の低温度化、また光学恒数の調整に非常に有効な成分で
ある。しかし１５％より少ないと上記の効果が少なく、
３５％より多くなると失透傾向を増してしまうので所定
の範囲内とする。ZnO is the yield temperature (A) of glass grass compared to the components of the pond.
It is a very effective component for lowering the temperature and adjusting optical constants. However, if it is less than 15%, the above effect will be small,
If it exceeds 35%, the tendency to devitrify increases, so it should be within a predetermined range.
Ｂ ａ ＯはＺ ｎ Ｏと同様屈伏温度（Ａｔ＞の低温
度化にイ４効であり、さらにガラスの安定性の向上、ま
た屈折率を高め低分解化するのに有効な成分である。し
かしながらｌ３ａＯの多量の使用はガラスの化学的耐久
性を悪くするので、その使用量は３０％以内とする。Like ZnO, B a O is effective in lowering the yield temperature (At>), and is also an effective component in improving the stability of the glass and increasing the refractive index and lowering the decomposition. However, since the use of a large amount of l3aO deteriorates the chemical durability of the glass, the amount used is limited to 30% or less.
ＳｒＯは光学恒数の調整に使用する成分であるが、１５
％より多くなるとガラスの安定性を損なうので、所定内
とする。SrO is a component used to adjust optical constants, but 15
If it exceeds %, the stability of the glass will be impaired, so it should be within the specified range.
ＣａＯは化学的耐久性の向上、光学恒数の調整に有効な
成分であるが、 ３０％より多くなると失ｉＪ傾向が増
大する。CaO is an effective component for improving chemical durability and adjusting optical constants, but if it exceeds 30%, the tendency to lose iJ increases.
Ｍ ［ＯはＣａＯと同様ガラスの化学的耐久性を向上す
るのに有効な成分であるが、その使用量を多くするとガ
ラスの安定性を損なうので３，５％以内とする。M[O, like CaO, is an effective component for improving the chemical durability of glass, but if its usage is too large, it will impair the stability of the glass, so it should be kept within 3.5%.
Ｌ ｉ−０は少鼠の配合成分としてｉｉ量加えることに
にす、ガラスの安定性を損なうことなく著しくプレス成
形時のンＱ度を下げる効果を持つ。しかし５％より多く
なるとガラスの失透傾向を増し、さらに化学的耐久性が
、電くなるので所定の範囲内とす る。When L i-0 is added in a small amount as a compounding component, it has the effect of significantly lowering the Q degree during press molding without impairing the stability of the glass. However, if it exceeds 5%, the tendency of the glass to devitrify increases, and furthermore, the chemical durability deteriorates, so it should be within a predetermined range.
Ａ１．！○、はガラスの化学的耐久性の向にに非常にイ
■効であるか、 ９％より多くなると、ガラスの軟化ｌ
門度が上昇し゛（しまうので、所定内とする。A1. ! ○ has a very good effect on the chemical durability of glass, and when it exceeds 9%, it softens the glass.
The gate rate will increase, so keep it within the prescribed limit.
Ｎｌ〕ｚＯ−及びＺｒ・０２は少ＩＩ添加することによ
つ゛（、光学恒数の微調整を行なうための成分である。Nl]zO- and Zr.02 are components for finely adjusting the optical constants by adding a small amount of II.
しか【、ながらＮ ｂ −＋Ｏｓにつし＼ては、 １．
５％より多くなると、またＺｒＯ，！については、 １
． ０％よ！）多くなると、所定の光学恒数の範囲を超
えてしまうと共に、ガラスの安定性が悪くなるので、そ
の範囲内に限定する。However, for N b −+Os, 1.
When it becomes more than 5%, ZrO,! Regarding 1
．． 0%! ) If the amount increases, it will exceed the predetermined range of optical constants and the stability of the glass will deteriorate, so it is limited to within that range.
本発明の光学ガラスに＋ｉ、上記成分の１こに光学性能
のｉ１４整、溶離性の改善、ガラス化範囲の拡大等のた
めに、本発明の目的から外れない限りＮａ２Ｏ、ＩＺ
ｒｏ、 Ｃｓ ｉｏ、 Ｓ ｉ ０２、Ｙ ２０
Ｉ、Ｔａ２’５、■、８２０１などを含有させることが
できる。To the optical glass of the present invention, Na2O, IZ, etc. are added to one of the above components in order to improve the optical performance, improve the elubility, expand the vitrification range, etc., as long as it does not depart from the purpose of the present invention.
ro, Cs io, S i 02, Y 20
I, Ta2'5, ■, 8201, etc. can be contained.
［実施例］
次に本発明に係わる実施例の組成（数値は＠量％）、屈
折率ｔｎｄ）、アツベ数（γｄ）、屈伏湯層ｆＡｔ）
を第１表に示す。[Example] Next, the composition (values are @amount%), refractive index tnd), Atsube number (γd), and sagging layer fAt) of the example according to the present invention
are shown in Table 1.
第
表
本発明の光学ガラスは、各成分の原料として各々１１自
する酸化物、水酸化物、１１４１１１１塩、炭酸塩、硝
Ｕ塩等を１史川し、所定の割合で秤量し、充分混合して
ガラス調合原料として、白金製坩堝に投入して電気炉で
＋ ０００°Ｃ〜１３００℃で溶融し、白金製１覚拌棒
にて１立件して、清澄、均質化してから適当な温度に予
熱した金望内に鋳込んだ瞳、保冷して作る。Table 1: The optical glass of the present invention is prepared by mixing 11 oxides, hydroxides, 1141111 salts, carbonates, nitrate salts, etc. as raw materials for each component, weighing them in predetermined proportions, and thoroughly mixing them. As a raw material for glass preparation, it is put into a platinum crucible and melted at +000°C to 1300°C in an electric furnace, stirred with a platinum stirrer, clarified and homogenized, and then heated to an appropriate temperature. The eyes are cast in a preheated metal bowl and kept cold.
なおガラスの着色を防ぎ、脱泡のため少量のＡＳ２０１
を加えること、 または工業上良く知られている脱泡成
分の少量添加は、本発明の効果に影響を１文ない。In addition, a small amount of AS201 is added to prevent glass coloring and to defoam.
or the addition of a small amount of an industrially well-known defoaming component has no effect on the effects of the present invention.
［発明の効果］
本発明によれば、屈伏ｔｌＡ度（ＡＬ）が５００°Ｃ以
ドで、屈１ｎ率（ｎｄ）が１． ５３〜１． ６２、ア
ツベ数（νｄ）が５９．０〜６４．０の光学恒数を有し
、失透に対して安定であり、比較的低％ｒＩＱ度で精密
ブＬ・スでき、プレス成形１会、研削または研磨を８夢
としない精密プレスレンズ用光学力゛ラスが肖られる。[Effects of the Invention] According to the present invention, the yielding tlA degree (AL) is 500°C or higher, and the refractive index (nd) is 1. 53-1. 62. Has an optical constant with an Atsubbe number (νd) of 59.0 to 64.0, is stable against devitrification, can be precision brushed with a relatively low %rIQ degree, and can be used for press molding in one session. Introducing an optical power glass for precision press lenses that does not require grinding or polishing.
Claims (1)
ｎｄ）が１．５３〜１．６２であり、アッベ数（νｄ）
が５９．０〜６４．０で軟化点がきわめて低い中屈折率
低分散の精密プレスレンズ用光学ガラス。[Claims] P_2O_545-62% by weight (hereinafter expressed as %) B_2O_30-7% ZnO15-35% BaO0-30% SrO0-15% CaO0-10% MgO0-3.5% However, the total amount of ZnO + BaO + SrO + CaO + MgO 28-49% Li_2O_0-5% Al_2O_30-9% Nb_2O_50-1.5% ZrO_20-1.0% When the yield temperature (At) is 500°C or less, the refractive index (
nd) is 1.53 to 1.62, and the Abbe number (νd)
An optical glass for precision press lenses with a medium refractive index and low dispersion, which has an extremely low softening point of 59.0 to 64.0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63276492A JP2616980B2 (en) | 1988-11-01 | 1988-11-01 | Optical glass for precision press molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63276492A JP2616980B2 (en) | 1988-11-01 | 1988-11-01 | Optical glass for precision press molding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02124743A true JPH02124743A (en) | 1990-05-14 |
| JP2616980B2 JP2616980B2 (en) | 1997-06-04 |
Family
ID=17570212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63276492A Expired - Lifetime JP2616980B2 (en) | 1988-11-01 | 1988-11-01 | Optical glass for precision press molding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2616980B2 (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10316447A (en) * | 1997-05-14 | 1998-12-02 | Nikon Corp | Optical glass |
| JP2002211949A (en) * | 2001-01-12 | 2002-07-31 | Minolta Co Ltd | Optical glass for press molding, preform material for press molding and optical element using the same |
| EP1275622A1 (en) * | 2001-07-13 | 2003-01-15 | Sumita Optical Glass, Inc. | An optical glass for molding |
| DE10239572B3 (en) * | 2002-08-23 | 2004-01-08 | Schott Glas | Lead-free and preferably arsenic-free optical heavy crown glasses and their use |
| JP2004168593A (en) * | 2002-11-20 | 2004-06-17 | Minolta Co Ltd | Optical glass |
| JP2005082458A (en) * | 2003-09-10 | 2005-03-31 | Minolta Co Ltd | Optical glass and optical element |
| EP1555247A1 (en) | 2004-01-16 | 2005-07-20 | Schott AG | Optical glass in particular for press-moulded optical elements |
| US7151064B2 (en) | 2001-10-30 | 2006-12-19 | Sumita Optical Glass, Inc. | Optical glass suitable for mold forming |
| JP2009040663A (en) * | 2007-08-10 | 2009-02-26 | Ohara Inc | Optical glass |
| JP2010037154A (en) * | 2008-08-06 | 2010-02-18 | Konica Minolta Opto Inc | Optical glass and optical device |
| DE102009011508A1 (en) | 2009-03-06 | 2010-09-09 | Schott Ag | Optical glass |
| JP2010269980A (en) * | 2009-05-22 | 2010-12-02 | Konica Minolta Opto Inc | Optical glass |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5361608A (en) * | 1976-11-16 | 1978-06-02 | Hoya Glass Works Ltd | Infrareddabsorbing glass of low melting point |
| JPS55154343A (en) * | 1979-05-18 | 1980-12-01 | Philips Nv | Precisely pressed glass product* glass and manufacture of glass |
| JPS5879839A (en) * | 1981-10-22 | 1983-05-13 | エヌ・ベー・フイリップス・フルーイランペンフアブリケン | Precision press formation optical part and glass therefor |
| JPS60122749A (en) * | 1983-12-02 | 1985-07-01 | Hoya Corp | Optical glass |
-
1988
- 1988-11-01 JP JP63276492A patent/JP2616980B2/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5361608A (en) * | 1976-11-16 | 1978-06-02 | Hoya Glass Works Ltd | Infrareddabsorbing glass of low melting point |
| JPS55154343A (en) * | 1979-05-18 | 1980-12-01 | Philips Nv | Precisely pressed glass product* glass and manufacture of glass |
| JPS5879839A (en) * | 1981-10-22 | 1983-05-13 | エヌ・ベー・フイリップス・フルーイランペンフアブリケン | Precision press formation optical part and glass therefor |
| JPS60122749A (en) * | 1983-12-02 | 1985-07-01 | Hoya Corp | Optical glass |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10316447A (en) * | 1997-05-14 | 1998-12-02 | Nikon Corp | Optical glass |
| JP2002211949A (en) * | 2001-01-12 | 2002-07-31 | Minolta Co Ltd | Optical glass for press molding, preform material for press molding and optical element using the same |
| EP1275622A1 (en) * | 2001-07-13 | 2003-01-15 | Sumita Optical Glass, Inc. | An optical glass for molding |
| US6784128B2 (en) | 2001-07-13 | 2004-08-31 | Sumita Optical Glass, Inc. | Optical glass for molding |
| US7151064B2 (en) | 2001-10-30 | 2006-12-19 | Sumita Optical Glass, Inc. | Optical glass suitable for mold forming |
| DE10239572B3 (en) * | 2002-08-23 | 2004-01-08 | Schott Glas | Lead-free and preferably arsenic-free optical heavy crown glasses and their use |
| CN1303025C (en) * | 2002-08-23 | 2007-03-07 | 肖特股份有限公司 | Leadless and specially arseniumless optical double-crown glass |
| JP2004168593A (en) * | 2002-11-20 | 2004-06-17 | Minolta Co Ltd | Optical glass |
| JP2005082458A (en) * | 2003-09-10 | 2005-03-31 | Minolta Co Ltd | Optical glass and optical element |
| EP1555247A1 (en) | 2004-01-16 | 2005-07-20 | Schott AG | Optical glass in particular for press-moulded optical elements |
| US7396787B2 (en) | 2004-01-16 | 2008-07-08 | Schott Ag | Optical glass and process for making precise-pressed optical elements therefrom as well as said optical elements |
| JP2009040663A (en) * | 2007-08-10 | 2009-02-26 | Ohara Inc | Optical glass |
| JP2010037154A (en) * | 2008-08-06 | 2010-02-18 | Konica Minolta Opto Inc | Optical glass and optical device |
| US8008219B2 (en) | 2008-08-06 | 2011-08-30 | Konica Minolta Opto, Inc. | Optical glass and optical element |
| DE102009011508A1 (en) | 2009-03-06 | 2010-09-09 | Schott Ag | Optical glass |
| US8168553B2 (en) | 2009-03-06 | 2012-05-01 | Schott Ag | Optical glass, method of making the optical glass, optical elements made with the optical glass and uses thereof |
| DE102009011508B4 (en) * | 2009-03-06 | 2017-03-09 | Schott Ag | Optical glass and its use |
| JP2010269980A (en) * | 2009-05-22 | 2010-12-02 | Konica Minolta Opto Inc | Optical glass |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2616980B2 (en) | 1997-06-04 |
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