JPH08104536A - Optical glass - Google Patents
Optical glassInfo
- Publication number
- JPH08104536A JPH08104536A JP26839994A JP26839994A JPH08104536A JP H08104536 A JPH08104536 A JP H08104536A JP 26839994 A JP26839994 A JP 26839994A JP 26839994 A JP26839994 A JP 26839994A JP H08104536 A JPH08104536 A JP H08104536A
- Authority
- JP
- Japan
- Prior art keywords
- glass
- component
- range
- sro
- cao
- 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.)
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Links
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
- C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
- C03C3/097—Glass compositions containing silica with 40% to 90% silica, by weight containing phosphorus, niobium or tantalum
-
- 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
- C03C3/12—Silica-free oxide glass compositions
- C03C3/16—Silica-free oxide glass compositions containing phosphorus
- C03C3/21—Silica-free oxide glass compositions containing phosphorus containing titanium, zirconium, vanadium, tungsten or molybdenum
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Ceramic Engineering (AREA)
- Glass Compositions (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、屈折率（Ｎｄ）１．５
７〜１．７２、アッベ数（νｄ）３０〜４５の範囲の光
学恒数を有し、低い転移温度特性を付与してモールドプ
レス成形性を改善しつつ、かつ、化学的耐久性に優れた
ＳｉＯ2−ＴｉＯ2−ＺｒＯ2−Ｌｉ2Ｏ−Ｋ2Ｏ−ＲＯ
（ＲはＭｇ、Ｃａ、Ｓｒ、Ｂａ、Ｚｎ）系の光学ガラス
に関する。The present invention has a refractive index (Nd) of 1.5.
It has an optical constant in the range of 7 to 1.72 and an Abbe number (νd) of 30 to 45, imparts low transition temperature characteristics to improve mold press moldability, and has excellent chemical durability. SiO 2 -TiO 2 -ZrO 2 -Li 2 O-K 2 O-RO
(R is Mg, Ca, Sr, Ba, Zn) -based optical glass.
【０００２】[0002]
【従来の技術】従来、上記光学恒数を有するガラスとし
ては、ＰｂＯ含有珪酸塩系ガラスが良く知られている。
しかし、ガラスの製造過程等における公害問題に対処す
るため、有害なＰｂＯ成分を含まず、これに代わってＴ
ｉＯ2を含有するガラスが種々検討されてきている。例
えば、独乙国特許第９７３３５０号公報には、Ｔｉ
Ｏ2、弗素珪酸塩系ガラスが開示されており、また特開
昭５４−１０５１１９号公報には、ＳｉＯ2−ＴｉＯ2−
Ｋ2Ｏ−ＢＰＯ4および／またはＡｌ（ＰＯ3）3系ガラス
が開示されているが、これらのガラスはいずれも化学的
耐久性が不十分であり、前者のガラスは溶融の際、弗素
成分の揮発により、均質化しにくい。また英国特許第２
１６５２３１号公報には、ＴｉＯ2、Ｌｉ2Ｏ含有アルカ
リ珪酸塩系ガラスが開示されているが、このガラスは低
い転移温度（以下Ｔｇという）を有するものの、化学的
耐久性が悪い。2. Description of the Related Art PbO-containing silicate glass is well known as a glass having the above optical constant.
However, in order to deal with the pollution problem in the glass manufacturing process, it does not contain harmful PbO component, and instead of T
Various glasses containing iO 2 have been investigated. For example, German Patent No. 973350 discloses Ti
O 2 and fluorosilicate glass are disclosed, and JP-A-54-105119 discloses SiO 2 —TiO 2 —.
K 2 O-BPO 4 and / or Al (PO 3) is 3 based glass is disclosed, none of these glasses also have insufficient chemical durability, when the former of the glass in a molten, fluorine component It is difficult to homogenize due to volatilization of Also the British patent No. 2
Japanese Patent No. 165231 discloses a TiO 2 and Li 2 O-containing alkali silicate glass, which has a low transition temperature (hereinafter referred to as Tg), but has poor chemical durability.
【０００３】[0003]
【発明が解決しようとする課題】本発明は、上記従来の
ガラスが有する諸欠点を総合的に改善し、前記光学恒数
を有し、モールドプレスに適合する低Ｔｇ特性を維持し
つつ、一段と優れた化学的耐久性を有するＰｂＯフリー
の光学ガラスを提供することを目的とする。DISCLOSURE OF THE INVENTION The present invention comprehensively improves the various drawbacks of the above-mentioned conventional glasses, has the above-mentioned optical constants, and further maintains a low Tg characteristic suitable for a mold press, and further. It is an object to provide a PbO-free optical glass having excellent chemical durability.
【０００４】[0004]
【課題を解決するための手段】本発明者らは、前記目的
を達成するため、鋭意試験研究を重ねた結果、従来から
具体的に開示されていない特定組成範囲のＳｉＯ2−Ｔ
ｉＯ2−ＺｒＯ2−Ｌｉ2Ｏ−Ｋ2Ｏ−ＲＯ系のガラスにお
いて、前記所定の光学恒数とモールドプレスに適した低
Ｔｇ特性を維持しつつ、ガラスの化学的耐久性を一段と
改善された量産可能な所期のガラスが得られることをみ
いだし、本発明をなすに至った。Means for Solving the Problems The inventors of the present invention have conducted extensive studies in order to achieve the above-mentioned object, and as a result, have found that SiO 2 -T having a specific composition range which has not been disclosed concretely has been disclosed.
In the iO 2 —ZrO 2 —Li 2 O—K 2 O—RO type glass, the chemical durability of the glass is further improved while maintaining the predetermined optical constant and the low Tg characteristic suitable for mold pressing. It was found that the desired glass that can be mass-produced was obtained, and the present invention was completed.
【０００５】本発明にかかる光学ガラスの特徴は、重量
％で、ＳｉＯ2 ４８〜６４％、Ｂ2Ｏ3 ０〜４％、Ｔ
ｉＯ2 １５〜３０％、ＺｒＯ2 ３〜１２％、Ｎｂ2Ｏ5
０〜４％、Ｌｉ2Ｏ ０．５〜５％、Ｎａ2Ｏ ０〜２
５％、Ｋ2Ｏ ３〜３０％、ただし、Ｎａ2Ｏ＋Ｋ2Ｏ
１０〜３０％、ＭｇＯ ０〜１０％、ＣａＯ ０〜１０
％、ＳｒＯ ０〜１０％、ＢａＯ ０〜１５％、ＺｎＯ
０〜１０％、ただし、ＭｇＯ＋ＣａＯ＋ＳｒＯ＋Ｂａ
Ｏ＋ＺｎＯ ２〜２５％の範囲の各成分から成り、か
つ、屈折率（Ｎｄ）１．５７〜１．７２、アッベ数（ν
ｄ）３０〜４５の範囲の光学恒数を有することにある。The characteristics of the optical glass according to the present invention are, by weight%, SiO 2 48 to 64%, B 2 O 3 0 to 4%, and T 2.
iO 2 15-30%, ZrO 2 3-12%, Nb 2 O 5
0~4%, Li 2 O 0.5~5% , Na 2 O 0~2
5%, K 2 O 3 to 30%, but Na 2 O + K 2 O
10-30%, MgO 0-10%, CaO 0-10
%, SrO 0-10%, BaO 0-15%, ZnO
0-10%, but MgO + CaO + SrO + Ba
O + ZnO is composed of each component in the range of 2 to 25%, and has a refractive index (Nd) of 1.57 to 1.72 and an Abbe number (ν
d) To have an optical constant in the range of 30 to 45.
【０００６】上記各成分の組成範囲を限定した理由は次
の通りである。すなわちＳｉＯ2成分は、ガラス形成酸
化物として有効であるが、その量が４８％未満であると
ガラスの光線透過性および化学的耐久性が悪化し、また
６４％を超えるとガラスの溶融が困難になる。Ｂ2Ｏ3成
分は、ガラスの溶融性向上のため、化学的耐久性を悪化
しない範囲で４％程度まで添加し得る。The reasons for limiting the composition ranges of the above components are as follows. That is, the SiO 2 component is effective as a glass-forming oxide, but if the amount is less than 48%, the light transmittance and chemical durability of the glass deteriorate, and if it exceeds 64%, it is difficult to melt the glass. become. The B 2 O 3 component can be added up to about 4% within the range of not deteriorating the chemical durability in order to improve the melting property of the glass.
【０００７】ＴｉＯ2成分は、ガラスに高分散性を与え
るのに有効であるが、その量が１５％未満では屈折率が
低く、低分散となり、また３０％を超えるとガラスの光
線透過性および安定性が悪化する。好ましくは２１〜３
０％の範囲とすべきである。ＺｒＯ2成分は、化学的耐
久性を向上する重要な成分であるが、その量が３％未満
ではその効果が小さく、またその量が１２％を超えると
ガラスの化学的耐久性を悪化させる。好ましくは１０％
までで十分である。The TiO 2 component is effective in imparting high dispersibility to the glass, but if the amount is less than 15%, the refractive index is low and the dispersion becomes low, and if it exceeds 30%, the light transmittance of the glass and the Stability deteriorates. Preferably 21 to 3
It should be in the range of 0%. The ZrO 2 component is an important component for improving the chemical durability, but if its amount is less than 3%, its effect is small, and if it exceeds 12%, the chemical durability of glass is deteriorated. Preferably 10%
Is enough.
【０００８】Ｎｂ2Ｏ5成分は、ガラスの屈折率を高める
のに有効な成分であるが、その量は化学的耐久性維持の
ため、０．５〜４％の範囲が好ましい。Ｌｉ2Ｏ成分
は、ガラスに低Ｔｇ特性を与える効果が特に大きいので
重要な成分であるが、ガラスの化学的耐久性を維持しつ
つその効果を発揮させるためには、その量は０．５〜５
％の範囲にすべきである。The Nb 2 O 5 component is an effective component for increasing the refractive index of glass, but its amount is preferably in the range of 0.5 to 4% for maintaining chemical durability. The Li 2 O component is an important component because it has a particularly large effect of giving the glass a low Tg characteristic, but its amount is 0.5 in order to exert the effect while maintaining the chemical durability of the glass. ~ 5
It should be in the range of%.
【０００９】Ｎａ2Ｏ成分は、ガラスの溶融性改善のた
め、化学的耐久性を悪化しない限度で２５％まで添加し
得る。Ｋ2Ｏ成分は、ガラスの溶融性改善のほか安定性
向上に有効な成分であるが、その量が３％未満ではその
効果が不十分であり、また３０％を超えるとガラスの化
学的耐久性が悪くなる。ただし、Ｎａ2ＯとＫ2Ｏ成分の
合計量は、ガラスの溶融性と化学的耐久性維持のため、
１０〜３０％の範囲とすべきである。The Na 2 O component can be added up to 25% in order to improve the melting property of the glass as long as the chemical durability is not deteriorated. The K 2 O component is a component effective not only for improving the melting property of the glass but also for improving the stability, but if the amount is less than 3%, the effect is insufficient, and if it exceeds 30%, the chemical durability of the glass is high. The sex becomes worse. However, the total amount of Na 2 O and K 2 O components is
It should be in the range of 10-30%.
【００１０】ＭｇＯ、ＣａＯ、ＳｒＯ、ＢａＯおよびＺ
ｎＯ成分は、光学恒数の維持、ガラスの溶融性、安定性
および光線透過性を向上する成分であるので１種以上含
有させる必要があるが、これらの効果を得るためにはそ
れぞれ１０％、１０％、１０％、１５％および１０％ま
でで十分である。ただし、それらの成分の１種または２
種以上の合計量は、上記効果を発揮させるため２％以上
必要であり、また２５％を超えるとガラスが低分散にな
り、所望の光学恒数を得難くなる。MgO, CaO, SrO, BaO and Z
The nO component is a component that improves the maintenance of the optical constant, the melting property of the glass, the stability and the light transmittance, and therefore, it is necessary to include one or more of them, but in order to obtain these effects, 10% each, Up to 10%, 10%, 15% and 10% are sufficient. However, one or two of those ingredients
The total amount of the seeds or more is required to be 2% or more in order to exert the above-mentioned effect, and if it exceeds 25%, the glass has low dispersion and it becomes difficult to obtain a desired optical constant.
【００１１】なお、本発明のガラスの諸特性に悪影響を
及ぼさない範囲で、必要に応じ本発明のガラスにＡｌ2
Ｏ3、ＷＯ3を５％程度まで、ガラスの光学恒数の調整、
溶融性および化学的耐久性等の改善のために含有させる
ことができる。また、Ａｓ2Ｏ3およびＳｂ2Ｏ3各成分
は、清澄剤として各々１％程度まで添加することができ
る。If necessary, Al 2 may be added to the glass of the present invention as long as the characteristics of the glass of the present invention are not adversely affected.
Adjusting the optical constants of glass up to about 5% for O 3 and WO 3 ,
It may be contained for improving the meltability and the chemical durability. Further, each of As 2 O 3 and Sb 2 O 3 components can be added as a fining agent up to about 1%.
【００１２】[0012]
【実施例】次に、本発明の光学ガラスの実施例について
説明する。表１は、本発明の光学ガラスの実施組成例
（Ｎｏ．１〜Ｎｏ．１０）および従来のガラスの比較組
成例（Ｎｏ．Ａ、Ｎｏ．Ｂ）を、これらのガラスの屈折
率（Ｎｄ）、アッベ数（νｄ）、Ｔｇおよび耐酸性（Ｓ
Ｒ）数値とともに表１に示した。なお、上記ＳＲ値は国
際標準化機構ＩＳＯ ８４２４；１９８７（Ｅ）の測定
方法に準拠し、測定して得た結果を表したものである。
ここでＳＲ値は、所定の酸処理液中におけるガラス試料
が０．１μｍの浸食を受けるのに要した時間（ｈ）によ
って等級付けしたものである。ＳＲ値＝４および５の場
合は、ｐＨ０．３の硝酸溶液を用い、それぞれ０．１〜
１ｈおよび０．１ｈ以下を要したことを示す。また、Ｓ
Ｒ値＝５、５１、５２および５３の場合は、いずれもｐ
Ｈ４．６の酢酸緩衝液を用い、それぞれ１０ｈ以上、１
〜１０ｈ、０．１〜１ｈおよび０．１ｈ以下を要したこ
とを示している。EXAMPLES Next, examples of the optical glass of the present invention will be described. Table 1 shows the example compositions (No. 1 to No. 10) of the optical glass of the present invention and the comparative composition examples (No. A, No. B) of the conventional glass, and the refractive index (Nd) of these glasses. , Abbe number (νd), Tg and acid resistance (S
R) Shown in Table 1 together with numerical values. The SR value represents the result obtained by measurement in accordance with the measuring method of International Standardization Organization ISO 8424; 1987 (E).
Here, the SR value is graded by the time (h) required for a glass sample in a predetermined acid treatment liquid to be corroded by 0.1 μm. In the case of SR value = 4 and 5, a nitric acid solution having a pH of 0.3 was used, and
It shows that it took 1 h and 0.1 h or less. Also, S
When R value = 5, 51, 52 and 53, all are p
Using acetate buffer of H4.6, 10h or more, 1
It shows that it took 10 h, 0.1 to 1 h and 0.1 h or less.
【００１３】[0013]
【表１】 [Table 1]
【表１】 [Table 1]
【表１】 [Table 1]
【００１４】表１にみられる通り、本発明の実施組成例
のガラスＮｏ．６およびＮｏ．９は、それぞれほぼ同等
の光学恒数を有する比較組成例のガラスＮｏ．Ａおよび
Ｎｏ．Ｂと比較すると、いずれもＳＲ値が向上し、一段
と優れた化学的耐久性を示している。本発明の他の実施
組成例のガラスも同様に優れたＳＲ値を示している。ま
た、これらのガラスはいずれも耐失透性に優れ、また均
質化し易い。このため、上記実施例のガラスは製造が容
易であり、モールドプレスに適しているうえ、優れた化
学的耐久性を有している。なお、本発明の上記実施組成
例のガラスはいずれも硝酸塩、炭酸塩、酸化物等の通常
の光学ガラス原料を用いて秤量、混合し、これを白金坩
堝を用いて約１１００〜１３５０℃、約２〜５時間で溶
融脱泡し、攪拌均質化した後、金型に鋳込み、徐冷する
ことにより得ることができる。As can be seen from Table 1, the glass composition Nos. Of the composition examples of the present invention. 6 and No. 6 Glass No. 9 of Comparative Composition Example having almost the same optical constants. A and No. Compared to B, the SR value was improved in all cases, and the chemical durability was further improved. The glasses of other composition examples of the present invention also show excellent SR values. Moreover, all of these glasses have excellent devitrification resistance and are easy to homogenize. Therefore, the glasses of the above-mentioned examples are easy to manufacture, suitable for mold pressing, and have excellent chemical durability. In addition, all the glasses of the above composition examples of the present invention are weighed and mixed using ordinary optical glass raw materials such as nitrates, carbonates, and oxides, and this is mixed at about 1100 to 1350 ° C. using a platinum crucible. It can be obtained by melting and defoaming for 2 to 5 hours, homogenizing by stirring, casting in a mold, and slowly cooling.
【００１５】[0015]
【発明の効果】以上に述べた通り、本発明の光学ガラス
はＳｉＯ2−ＴｉＯ2−ＺｒＯ2−Ｌｉ2Ｏ−Ｋ2Ｏ−ＲＯ
系の特定組成を有するものであるから、屈折率（Ｎｄ）
１．５７〜１．７２、アッベ数（νｄ）３０〜４５の範
囲の光学恒数と低いＴｇとを有し、有害なＰｂＯ成分を
含有せず、しかも従来公知のガラスに比べて化学的耐久
性に一段と優れており、また量産性にも優れているので
有用である。As described above, the optical glass of the present invention is made of SiO 2 —TiO 2 —ZrO 2 —Li 2 O—K 2 O—RO.
Refractive index (Nd) because it has a specific composition of the system
It has an optical constant in the range of 1.57 to 1.72 and an Abbe number (νd) of 30 to 45 and a low Tg, does not contain harmful PbO components, and is chemically durable as compared with conventionally known glasses. It is useful because it is more excellent in productivity and mass productivity.
Claims (5)
Ｏ3 ０〜４％、ＴｉＯ2 １５〜３０％、ＺｒＯ2 ３
〜１２％、Ｎｂ2Ｏ5 ０〜４％、Ｌｉ2Ｏ０．５〜５
％、Ｎａ2Ｏ ０〜２５％、Ｋ2Ｏ ３〜３０％、ただ
し、Ｎａ2Ｏ＋Ｋ2Ｏ １０〜３０％、ＭｇＯ ０〜１０
％、ＣａＯ ０〜１０％、ＳｒＯ ０〜１０％、ＢａＯ
０〜１５％、ＺｎＯ ０〜１０％、ただし、ＭｇＯ＋
ＣａＯ＋ＳｒＯ＋ＢａＯ＋ＺｎＯ ２〜２５％の範囲の
各成分からなり、かつ、屈折率（Ｎｄ）１．５７〜１．
７２、アッベ数（νｄ）３０〜４５の範囲の光学恒数を
有することを特徴とする光学ガラス。1. SiO 2 48-64%, B 2 by weight%.
O 3 0 to 4%, TiO 2 15 to 30%, ZrO 2 3
~12%, Nb 2 O 5 0~4 %, Li 2 O0.5~5
%, Na 2 O 0 to 25%, K 2 O 3 to 30%, provided that Na 2 O + K 2 O 10 to 30% and MgO 0 to 10
%, CaO 0-10%, SrO 0-10%, BaO
0 to 15%, ZnO 0 to 10%, but MgO +
CaO + SrO + BaO + ZnO composed of 2 to 25% of each component and having a refractive index (Nd) of 1.57 to 1.
72, an optical glass having an optical constant in the range of Abbe number (νd) 30 to 45.
Ｏ3 ０〜４％、ＴｉＯ2 １５〜３０％、ＺｒＯ2 ３
〜１０％、Ｎｂ2Ｏ5 ０．５〜４％、Ｌｉ2Ｏ ０．５
〜５％、Ｎａ2Ｏ ０〜２５％、Ｋ2Ｏ ３〜３０％、た
だし、Ｎａ2Ｏ＋Ｋ2Ｏ １０〜３０％、ＭｇＯ ０〜１
０％、ＣａＯ ０〜１０％、ＳｒＯ０〜１０％、ＢａＯ
０〜１５％、ＺｎＯ ０〜１０％、ただし、ＭｇＯ＋
ＣａＯ＋ＳｒＯ＋ＢａＯ＋ＺｎＯ ２〜２５％の範囲の
各成分からなることを特徴とする請求項１に記載の光学
ガラス。2. By weight% SiO 2 48-64%, B 2
O 3 0 to 4%, TiO 2 15 to 30%, ZrO 2 3
~10%, Nb 2 O 5 0.5~4 %, Li 2 O 0.5
~5%, Na 2 O 0~25% , K 2 O 3~30%, however, Na 2 O + K 2 O 10~30%, MgO 0~1
0%, CaO 0-10%, SrO 0-10%, BaO
0 to 15%, ZnO 0 to 10%, but MgO +
CaO + SrO + BaO + ZnO 2-25% It consists of each component in the range, The optical glass of Claim 1 characterized by the above-mentioned.
ｉＯ2 １５〜３０％、ＺｒＯ2 ３〜１０％、Ｎｂ2Ｏ5
０．５〜４％、Ｌｉ2Ｏ ０．５〜５％、Ｎａ2Ｏ ０
〜２５％、Ｋ2Ｏ ３〜３０％、ただし、Ｎａ2Ｏ＋Ｋ2
Ｏ １０〜３０％、ＭｇＯ ０〜１０％、ＣａＯ ０〜
１０％、ＳｒＯ ０〜１０％、ＢａＯ０〜１５％、Ｚｎ
Ｏ ０〜１０％、ただし、ＭｇＯ＋ＣａＯ＋ＳｒＯ＋Ｂ
ａＯ＋ＺｎＯ ２〜２５％の範囲の各成分からなること
を特徴とする請求項１に記載の光学ガラス。3. By weight%, SiO 2 48-64%, T
iO 2 15-30%, ZrO 2 3-10%, Nb 2 O 5
0.5~4%, Li 2 O 0.5~5% , Na 2 O 0
~25%, K 2 O 3~30% , however, Na 2 O + K 2
O 10-30%, MgO 0-10%, CaO 0
10%, SrO 0-10%, BaO 0-15%, Zn
O 0-10%, but MgO + CaO + SrO + B
The optical glass according to claim 1, which comprises each component in the range of aO + ZnO 2 to 25%.
ｉＯ2 ２１〜３０％、ＺｒＯ2 ３〜１０％、Ｎｂ2Ｏ5
０．５〜４％、Ｌｉ2Ｏ ０．５〜５％、Ｎａ2Ｏ ０
〜２５％、Ｋ2Ｏ ３〜３０％、ただし、Ｎａ2Ｏ＋Ｋ2
Ｏ １０〜３０％、ＭｇＯ ０〜１０％、ＣａＯ ０〜
１０％、ＳｒＯ ０〜１０％、ＢａＯ０〜１０％、Ｚｎ
Ｏ ０〜１０％、ただし、ＭｇＯ＋ＣａＯ＋ＳｒＯ＋Ｂ
ａＯ＋ＺｎＯ ２〜２５％の範囲の各成分からなること
を特徴とする請求項１に記載の光学ガラス。4. By weight%, SiO 2 48-64%, T
iO 2 21-30%, ZrO 2 3-10%, Nb 2 O 5
0.5~4%, Li 2 O 0.5~5% , Na 2 O 0
~25%, K 2 O 3~30% , however, Na 2 O + K 2
O 10-30%, MgO 0-10%, CaO 0
10%, SrO 0-10%, BaO 0-10%, Zn
O 0-10%, but MgO + CaO + SrO + B
The optical glass according to claim 1, which comprises each component in the range of aO + ZnO 2 to 25%.
あることを特徴とする請求項１、２、３または４に記載
の光学ガラス。5. The optical glass according to claim 1, 2, 3 or 4, wherein the transition temperature of the glass is 550 ° C. or lower.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26839994A JP3190215B2 (en) | 1994-07-14 | 1994-10-06 | Optical glass |
| CN95103393A CN1044223C (en) | 1994-10-06 | 1995-05-08 | Optical glass |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18545794 | 1994-07-14 | ||
| JP6-185457 | 1994-07-14 | ||
| JP26839994A JP3190215B2 (en) | 1994-07-14 | 1994-10-06 | Optical glass |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08104536A true JPH08104536A (en) | 1996-04-23 |
| JP3190215B2 JP3190215B2 (en) | 2001-07-23 |
Family
ID=26503109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26839994A Expired - Fee Related JP3190215B2 (en) | 1994-07-14 | 1994-10-06 | Optical glass |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3190215B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013180082A1 (en) * | 2012-05-28 | 2013-12-05 | 株式会社オハラ | Optical glass |
| WO2022075171A1 (en) * | 2020-10-06 | 2022-04-14 | 日本電気硝子株式会社 | Tube glass, pharmaceutical primary packaging container, and alkali silicate glass |
-
1994
- 1994-10-06 JP JP26839994A patent/JP3190215B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013180082A1 (en) * | 2012-05-28 | 2013-12-05 | 株式会社オハラ | Optical glass |
| JP2013245140A (en) * | 2012-05-28 | 2013-12-09 | Ohara Inc | Optical glass |
| WO2022075171A1 (en) * | 2020-10-06 | 2022-04-14 | 日本電気硝子株式会社 | Tube glass, pharmaceutical primary packaging container, and alkali silicate glass |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3190215B2 (en) | 2001-07-23 |
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