JPS61163138A - Optical glass having high refractive index and low dispersion - Google Patents
Optical glass having high refractive index and low dispersionInfo
- Publication number
- JPS61163138A JPS61163138A JP386885A JP386885A JPS61163138A JP S61163138 A JPS61163138 A JP S61163138A JP 386885 A JP386885 A JP 386885A JP 386885 A JP386885 A JP 386885A JP S61163138 A JPS61163138 A JP S61163138A
- Authority
- JP
- Japan
- Prior art keywords
- refractive index
- optical glass
- glass
- high refractive
- low dispersion
- 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
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Abstract
Description
【発明の詳細な説明】
（発明の技術分野）
本発明は高屈折率低分散の光学ガラス、詳しくは第１図
（ｎ、’ｄ図）に示す点Ａ、Ｂ、Ｃ。DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to an optical glass having a high refractive index and low dispersion.
Ｄ、 ＥおよびＦの６点に囲まれた範囲内の光学恒数値
を有するＢ２０．−＾１ｚＯｚ ＬｉｔＯ３Ｙｂ２Ｏ
３の４成分系の光学ガラスに関する。B20. having optical constant values within the range surrounded by six points D, E and F. -＾1zOz LitO3Yb2O
3. Concerning the four-component optical glass.
（発明の背景）
従来、この種の高屈折率低分散の光学ガラスは、多くの
場合、高屈折率低分散性を付与する成分として酸化トリ
ウム（Ｔｈａｔ） 、および酸化カドミウム（ＣｄＯ）
を含んでいたが、これらの成分はいずれも人体に有害で
あるために使用は避けなければならない。(Background of the Invention) Conventionally, this type of high refractive index, low dispersion optical glass often contains thorium oxide (That) and cadmium oxide (CdO) as components that impart high refractive index and low dispersion.
However, these ingredients must be avoided as they are harmful to the human body.
そのため、トリウム、およびカドミウムに代えて、高屈
折率低分散性を付与する成分として酸化イッテルビウム
（ＹｂｔＯｓ）を使用した：Ｂ！０３ Ｌａｇ’ｓ
ＹｂｚＯ＋ ＴａｇＯｓ系ガラスが開発された。Therefore, instead of thorium and cadmium, ytterbium oxide (YbtOs) was used as a component that imparts high refractive index and low dispersion: B! 03 Lag's
YbzO+TagOs-based glasses have been developed.
しかし、このガラスは失透に対する安定性が充分とは言
い難く、また熔融温度が高く、更に成形時のガラスの粘
度が低いという欠点を有する。それ故、工業的規模での
生産には適していなかった。However, this glass has drawbacks such as insufficient stability against devitrification, high melting temperature, and low viscosity during molding. Therefore, it was not suitable for production on an industrial scale.
（発明の目的） 本発明の目的は、第１図に示す点Ａ、Ｂ、Ｃ。(Purpose of the invention) The object of the present invention is to point A, B, and C shown in FIG.
Ｄ、ＥおよびＦの６点に囲まれた範囲内の光学恒数値を
持つ高屈折率低分散の光学ガラスであって、かつ人体に
有害なトリウムやカドミウムを含まず、工業的規模での
生産が容易なガラス組成物を提供することにある。A high refractive index, low dispersion optical glass with optical constant values within the range surrounded by the six points D, E, and F, which does not contain thorium or cadmium, which are harmful to the human body, and which can be produced on an industrial scale. The object of the present invention is to provide a glass composition that is easy to use.
（発明の概要）
本発明者らは、ＢｚＯｓ Ｌａｇ’ｓ ＹｂｚＯｘ
の３成分系に種々の成分を導入し、光学恒数値、ガラス
の失透に対する安定性、熔融性の向上、熔融温度及び液
相温度の低下、並びに成形時のガラス粘度の高粘度化に
関して、鋭意研究を重ねた。その結果、ＡＩ’ＺＯ３が
最も効果的な成分であり、しかもその効果は６重量％以
上含有させることによって飛躍的に向上し、さらに化学
的耐久性も著しく改善できる事実を見い出し、本発明を
なすに至った。(Summary of the invention) The present inventors have discovered that BzOs Lag's YbzOx
Various components are introduced into the three-component system to improve optical constant values, stability against glass devitrification, meltability, lower melting temperature and liquidus temperature, and increase glass viscosity during molding. I have done extensive research. As a result, we discovered that AI'ZO3 is the most effective ingredient, and that its effect is dramatically improved by containing it at 6% by weight or more, and that the chemical durability can also be significantly improved, and we have made the present invention. reached.
即ち、本発明の光学ガラスは、下記組成：Ｂｔｕｓ
２０〜５０重量％
Ｌａｔ、ｓ １０〜５５
ＹｂｚＯｓ ５〜５０
Ａｔ！０３ ６〜２５
Ｓｉ０□ ０〜１０
ＲｌＯＯ〜３
（Ｒ７０は、ＬｉｔＯ，ＮａｚＯおよびａｇｏのうち１
種又は２種以上の組合わせ）
ＲＯＯ〜２５
（ＲＯは、ＭｇＯ、ＣａＯ、ＳｒＯおよびＢａＯのうち
１種又は２種以上の組合せ）
ＹｔＯｓ Ｏ〜２５
ＺｒＯｔ Ｏ〜１０
ｉａｔｏｓＯ〜２５
ＮｂｔＯｓ Ｏ〜２０
ｐｂｏ ｏ〜２０
ＷＯｓ Ｏ〜１０
ＴｔＯｚ Ｏ〜１０
ＧｅＯｌ Ｏ〜ｌ０
ＧｄｉＯｓ Ｏ〜１０
Ｆ Ｏ〜５
（ただし、フッ素Ｆは、全体を１００χとした場合の酸
素との置換量を表わす。）
を有する。That is, the optical glass of the present invention has the following composition: Btus
20-50% by weight Lat, s 10-55 YbzOs 5-50 At! 03 6~25 Si0□ 0~10 RlOO~3 (R70 is one of LitO, NazO and ago
species or a combination of two or more) ROO~25 (RO is one or a combination of two or more of MgO, CaO, SrO, and BaO) YtOs O~25 ZrOt O~10 iatosO~25 NbtOs O~20 pbo o~20 WOs O~10 TtOz O~10 GeOl O~10 GdiOs O~10 FO~5 (However, fluorine F represents the amount of substitution with oxygen when the total is 100χ.).
本発明に於いて、各成分の組成割合を限定したＢ２０．
は、２０％未満では失透に対する安定性が充分でなくな
り、逆に５０％を越えると屈折率が低下して目的に適さ
なくなる。In the present invention, B20.
If it is less than 20%, the stability against devitrification will not be sufficient, and if it exceeds 50%, the refractive index will decrease and it will not be suitable for the purpose.
Ｌａ、０．は、１０％未満では屈折率が低下して目的に
適さなくなり、逆に５５％を越えると失透に対する安定
性が低下する。La, 0. If it is less than 10%, the refractive index decreases and it becomes unsuitable for the purpose, whereas if it exceeds 55%, the stability against devitrification decreases.
Ｙｂ２Ｏ３は、５％未満および５０％を越えると失透に
対する安定性が低下する。If Yb2O3 is less than 5% or more than 50%, stability against devitrification decreases.
＾１２０３は、ガラス融液の粘度を高め、失透に対する
安定性を向上させ、化学的耐久性を良化させる効果を有
するが、６％未満では効果が少なく、また２５％を越え
ると逆に失透に対して不安定となる。^1203 has the effect of increasing the viscosity of the glass melt, improving stability against devitrification, and improving chemical durability, but if it is less than 6%, it has little effect, and if it exceeds 25%, it has the effect of improving chemical durability. It becomes unstable against devitrification.
５ｉＯｚは、失透に対する安定性を向上させ、化学的耐
久性を高めるので任意に添加してもよいが、１０％を越
えると熔融の際に熔は残り、熔融を長引かせるので、好
ましくない。5iOz improves the stability against devitrification and increases the chemical durability, so it may be optionally added, but if it exceeds 10%, the melt remains during melting, prolonging the melting process, which is not preferable.
ＲｚＯは、ガラスの粘度を低下させてガラスの成形を容
易にするので任意に添加してもよいが、合計で３％を越
えると失透に対する安定性が低下する。RzO reduces the viscosity of the glass and facilitates glass molding, so it may be added as desired, but if the total amount exceeds 3%, stability against devitrification decreases.
ＺｎＯは、ガラスの熔融性、及び均質化を促進させるの
で添加してもよいが、２０％を越えると失透に対する安
定性が低下する。ZnO may be added because it promotes the meltability and homogenization of the glass, but if it exceeds 20%, the stability against devitrification decreases.
ＲＯは、ガラスの失透に対する安定性を向上させ、かつ
熔融性を著しく高める有効な成分であるので必要に応じ
１重量％以上添加してもよいが、合計で２５％を越える
と失透に対する安定性が低下する。RO is an effective component that improves the stability against devitrification of glass and significantly increases the melting properties, so it may be added in an amount of 1% by weight or more if necessary, but if the total amount exceeds 25%, it will be Stability decreases.
Ｙ２Ｏ，は、ガラスのアツベ数を大きくし、化学的耐久
性を向上させるので添加してもよいが、２５％を越える
と失透に対する安定性が低下する。Y2O may be added because it increases the Abbes number of the glass and improves its chemical durability, but if it exceeds 25%, the stability against devitrification decreases.
ＺｒＯ□は、ガラスの屈折率を高め、また化学的耐久性
を高めるので添加してもよいが、１０％を越えると失透
に対する安定性が低下する。ZrO□ may be added because it increases the refractive index of the glass and also improves the chemical durability, but if it exceeds 10%, the stability against devitrification decreases.
ＴａｚＯｓは、ガラスの屈折率を高め、失透に対する安
定性を高め、化学的耐久性を高めるので添加してもよい
が、２５％を越えると熔融時に未熔融成分が残り、また
アツベ数が低下して目的に適さなくなる。TazOs can be added because it increases the refractive index of the glass, increases stability against devitrification, and increases chemical durability, but if it exceeds 25%, unmelted components will remain when melting, and the Atsushi number will decrease. and become unfit for purpose.
ＮｂｚＯ３は、ガラスの屈折率を高め、化学的耐久性を
高めるので添加してもよいが、２０％を越えると着色が
強くなり、実用的でなくなる。NbzO3 may be added because it increases the refractive index of the glass and improves its chemical durability, but if it exceeds 20%, coloring becomes strong and it is not practical.
ＰｂＯはガラスの屈折率を高めるので添加してもよいが
、２０％を越えると着色が強くなり、実用的でなくなる
。PbO may be added because it increases the refractive index of the glass, but if it exceeds 20%, the coloring becomes strong and becomes impractical.
ＷＯ３はガラスの屈折率を高め、失透に対する安定性を
高めるので添加してもよいが、１０％を越えると着色が
強くなり、実用的でなくなる。WO3 may be added because it increases the refractive index of the glass and improves the stability against devitrification, but if it exceeds 10%, coloring becomes strong and it is not practical.
Ｔｉ０１はガラスの屈折率を高め、化学的耐久性を高め
るので添加してもよいが、１０％を越えると、 ゛着色
が強くなり、実用的でなくなる。Ti01 may be added because it increases the refractive index of the glass and improves its chemical durability, but if it exceeds 10%, the coloring becomes strong and it becomes impractical.
ＧｅＯ２は失透に対する安定性を高めるので添加しても
よいが、１０％を越えると、逆に失透に対して不安Ｖ七
なる。GeO2 may be added because it increases the stability against devitrification, but if it exceeds 10%, there will be a problem with devitrification.
Ｇｄ、０．はガラスの屈折率を高め、化学的耐久性を向
上させるので添加してもよいが、１０％を越える失透に
対して不安定となる。Gd, 0. may be added because it increases the refractive index of the glass and improves its chemical durability, but it becomes unstable when devitrification exceeds 10%.
Ｆは液相温度を低下し、失透に対する安定性を高めるの
で添加してもよいが、５％を越えると失透に対する安定
性が低下する。F lowers the liquidus temperature and increases stability against devitrification, so it may be added, but if it exceeds 5%, stability against devitrification decreases.
本発明に係る光学ガラスは、例えば、各成分の原料とし
て、酸化物、炭酸塩、硝酸塩、フッ化物等を使用し、所
望の割合に秤量し、均一に混合して調合原料となし、こ
れを１２００℃〜１４００℃に加熱した電気炉中の白金
るつぼに投入し、熔融、清澄、撹拌し、均一化してから
鉄製の鋳型に鋳込んで製造することができる。The optical glass according to the present invention uses, for example, oxides, carbonates, nitrates, fluorides, etc. as raw materials for each component, weighs them in desired proportions, and uniformly mixes them to form a compounded raw material. It can be produced by placing it in a platinum crucible in an electric furnace heated to 1200°C to 1400°C, melting, clarifying, stirring and homogenizing it, and then casting it into an iron mold.
（実施例）
つぎに本発明に係る光学ガラスの実施例の組成（重量％
）、屈折率（ｎａ）、およびアツベ数（ν４）を下記第
１表に示す。(Example) Next, the composition of the example of the optical glass according to the present invention (wt%
), refractive index (na), and Abbe number (v4) are shown in Table 1 below.
（発明の効果）
以上のとおり、本発明によれば、第１図に示す点Ａ、
Ｂ、 Ｃ，Ｄ、 Ｅ及びＦの６点に囲まれた範囲内の光
学恒数値を有する光学ガラスを工業的規模で安定して得
ることができる。(Effects of the Invention) As described above, according to the present invention, point A shown in FIG.
Optical glasses having optical constant values within the range of six points B, C, D, E, and F can be stably obtained on an industrial scale.
第１図は、縦軸に屈折率ｎａ、横軸にアツベ数ν４をプ
ロットして得られるｎ、−
ν４図である。FIG. 1 is an n, -v4 diagram obtained by plotting the refractive index na on the vertical axis and the Abbe number v4 on the horizontal axis.
Claims (1)
点Ａ（１．６０、６２）、Ｂ（１．６３、６２）、Ｃ（
１．８１、４９）、Ｄ（１．８１、３９）、Ｅ（１．７
８、３９）、およびＦ（１．６０、５７）の６点に囲ま
れた範囲内の光学恒数値を有する光学ガラス。 記 Ｂ＿２Ｏ＿３ ２０〜５０ Ｌａ＿２Ｏ＿３ １０〜５５ Ｙｂ＿２Ｏ＿３ ５〜５０ Ａｌ＿２Ｏ＿３ ６〜２５ ＳｉＯ＿２ ０〜１０ Ｒ＿２Ｏ ０〜３ （Ｒ＿２Ｏは、Ｌｉ＿２Ｏ、Ｎａ＿２ＯおよびＫ＿２Ｏ
のうち１種又は２種以上の組合わせ） ＺｎＯ ０〜２０ ＲＯ ０〜２５ （ＲＯは、ＭｇＯ、ＣａＯ、ＳｒＯおよびＢａＯのうち
１種又は２種以上の組合せ） Ｙ＿２Ｏ＿３ ０〜２５ ＺｒＯ＿２ ０〜１０ Ｔａ＿２Ｏ＿５ ０〜２５ Ｎｂ＿２Ｏ＿５ ０〜２０ ＰｂＯ ０〜２０ ＷＯ＿３ ０〜１０ ＴｉＯ＿２ ０〜１０ ＧｅＯ＿３ ０〜１０ Ｇｄ＿２Ｏ＿３ ０〜１０ Ｆ ０〜５ （ただし、フッ素Ｆは、全体を１００％とした場合の酸
素との置換量を表わす。） ２ 前記ＲＯの割合が１〜２５％であることを特徴とす
る特許請求の範囲第１項に記載の光学ガラス。[Claims] Consisting of the following composition in 1 weight percent, points A (1.60, 62), B (1.63, 62), C (
1.81, 49), D (1.81, 39), E (1.7
8, 39) and F(1.60, 57). B_2O_3 20-50 La_2O_3 10-55 Yb_2O_3 5-50 Al_2O_3 6-25 SiO_2 0-10 R_2O 0-3 (R_2O is Li_2O, Na_2O and K_2O
ZnO 0-20 RO 0-25 (RO is one or a combination of two or more of MgO, CaO, SrO and BaO) Y_2O_3 0-25 ZrO_2 0-10 Ta_2O_5 0-25 Nb_2O_5 0-20 PbO 0-20 WO_3 0-10 TiO_2 0-10 GeO_3 0-10 Gd_2O_3 0-10 F 0-5 (However, fluorine F is the same as oxygen when the total is 100%. 2. The optical glass according to claim 1, wherein the ratio of the RO is 1 to 25%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP386885A JPS61163138A (en) | 1985-01-12 | 1985-01-12 | Optical glass having high refractive index and low dispersion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP386885A JPS61163138A (en) | 1985-01-12 | 1985-01-12 | Optical glass having high refractive index and low dispersion |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61163138A true JPS61163138A (en) | 1986-07-23 |
| JPH0559853B2 JPH0559853B2 (en) | 1993-09-01 |
Family
ID=11569166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP386885A Granted JPS61163138A (en) | 1985-01-12 | 1985-01-12 | Optical glass having high refractive index and low dispersion |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61163138A (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6753281B2 (en) * | 2001-07-03 | 2004-06-22 | Kabushiki Kaisha Ohara | Optical glass |
| US6753278B2 (en) * | 2001-05-08 | 2004-06-22 | Schott Glas | Optical glasses and their uses |
| US6797659B2 (en) * | 2001-06-06 | 2004-09-28 | Kabushiki Kaisha Ohara | Optical glass |
| US7138348B2 (en) | 2001-07-03 | 2006-11-21 | Kabushiki Kaisha Ohara | Optical glass |
| US7563738B2 (en) * | 2004-11-09 | 2009-07-21 | Kabushiki Kaisha Ohara | Optical glass |
| JP2010215503A (en) * | 2002-12-27 | 2010-09-30 | Hoya Corp | Optical glass, press-molding glass gob and optical element |
| JP2012126586A (en) * | 2010-12-13 | 2012-07-05 | Ohara Inc | Optical glass, preform, and optical element |
| JP2012229148A (en) * | 2011-04-27 | 2012-11-22 | Ohara Inc | Optical glass and optical element |
| JP2013063887A (en) * | 2010-12-13 | 2013-04-11 | Ohara Inc | Optical glass, preform and optical element |
| JP2013063888A (en) * | 2011-09-01 | 2013-04-11 | Ohara Inc | Optical glass, preform and optical element |
| JP2014133699A (en) * | 2011-10-28 | 2014-07-24 | Ohara Inc | Optical glass, preform and optical element |
| JP2017039640A (en) * | 2011-12-28 | 2017-02-23 | 株式会社オハラ | Optical glass and optical element |
| CN109279772A (en) * | 2017-07-21 | 2019-01-29 | 株式会社小原 | Optical glass, preform and optical element |
| CN109415240A (en) * | 2016-06-29 | 2019-03-01 | 株式会社小原 | Optical glass, preform and optical module |
-
1985
- 1985-01-12 JP JP386885A patent/JPS61163138A/en active Granted
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6753278B2 (en) * | 2001-05-08 | 2004-06-22 | Schott Glas | Optical glasses and their uses |
| US7605099B2 (en) * | 2001-05-08 | 2009-10-20 | Schott Ag | Optical glasses and their uses |
| US6797659B2 (en) * | 2001-06-06 | 2004-09-28 | Kabushiki Kaisha Ohara | Optical glass |
| US7138348B2 (en) | 2001-07-03 | 2006-11-21 | Kabushiki Kaisha Ohara | Optical glass |
| US6753281B2 (en) * | 2001-07-03 | 2004-06-22 | Kabushiki Kaisha Ohara | Optical glass |
| JP2010215503A (en) * | 2002-12-27 | 2010-09-30 | Hoya Corp | Optical glass, press-molding glass gob and optical element |
| US7563738B2 (en) * | 2004-11-09 | 2009-07-21 | Kabushiki Kaisha Ohara | Optical glass |
| JP2013063887A (en) * | 2010-12-13 | 2013-04-11 | Ohara Inc | Optical glass, preform and optical element |
| JP2012126586A (en) * | 2010-12-13 | 2012-07-05 | Ohara Inc | Optical glass, preform, and optical element |
| JP2012229148A (en) * | 2011-04-27 | 2012-11-22 | Ohara Inc | Optical glass and optical element |
| JP2013063888A (en) * | 2011-09-01 | 2013-04-11 | Ohara Inc | Optical glass, preform and optical element |
| JP2014133699A (en) * | 2011-10-28 | 2014-07-24 | Ohara Inc | Optical glass, preform and optical element |
| JP2017039640A (en) * | 2011-12-28 | 2017-02-23 | 株式会社オハラ | Optical glass and optical element |
| CN109415240A (en) * | 2016-06-29 | 2019-03-01 | 株式会社小原 | Optical glass, preform and optical module |
| JPWO2018003719A1 (en) * | 2016-06-29 | 2019-04-18 | 株式会社オハラ | Optical glass, preform material and optical element |
| CN114772923A (en) * | 2016-06-29 | 2022-07-22 | 株式会社小原 | Optical glass, preform and optical module |
| CN109279772A (en) * | 2017-07-21 | 2019-01-29 | 株式会社小原 | Optical glass, preform and optical element |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0559853B2 (en) | 1993-09-01 |
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