JPS593044A - Anomalous dispersion glass - Google Patents
Anomalous dispersion glassInfo
- Publication number
- JPS593044A JPS593044A JP10886382A JP10886382A JPS593044A JP S593044 A JPS593044 A JP S593044A JP 10886382 A JP10886382 A JP 10886382A JP 10886382 A JP10886382 A JP 10886382A JP S593044 A JPS593044 A JP S593044A
- Authority
- JP
- Japan
- Prior art keywords
- glass
- dispersion
- refractive index
- anomalous dispersion
- short wavelength
- 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
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
- 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
Landscapes
- 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)
- Glass Compositions (AREA)
Abstract
Description
【発明の詳細な説明】
技術の分野
本発明は異常分散を有するガラス、特に短波長域の部分
分散比が小さく、高屈折率領域で高い異常分散性を示す
フリントガラスに関する。異常分散性を有する光学ガラ
スは二次スペクトルの色収差除去に有効であり、特にフ
リント域では短波長域における部分分散比が小さい程効
果的である。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a glass having anomalous dispersion, particularly a flint glass having a small partial dispersion ratio in a short wavelength region and exhibiting high anomalous dispersion in a high refractive index region. Optical glass having anomalous dispersion is effective in removing chromatic aberration in the secondary spectrum, and particularly in the flint region, the smaller the partial dispersion ratio in the short wavelength region, the more effective it is.
従来の技術
従来、異常分散を有する代表的なフリントガラスとして
、Ｂ２Ｏ３−５ｉ０２−Ａ１２０３−ＰｂＯ系ガラスが
知られている。（特公昭４５−２３１１号公報）この組
成は、短波長域における部分分散比を著しく減少させる
成分であるＢ２Ｏ３をガラス形成成分として含有すると
共に、高屈折率高分散を得る為にＰｂＯを導入したもの
である。しかしながら、この組成では、ＰｂＯが短波長
域での部分分散比を増大させるので、該ＰｂＯを大量に
含有する高屈折率域では充分に低い部分分散比を得るこ
とができない。BACKGROUND OF THE INVENTION Conventionally, B2O3-5i02-A1203-PbO glass is known as a typical flint glass having anomalous dispersion. (Japanese Patent Publication No. 45-2311) This composition contains B2O3 as a glass forming component, which is a component that significantly reduces the partial dispersion ratio in the short wavelength range, and PbO is introduced to obtain a high refractive index and high dispersion. It is something. However, in this composition, since PbO increases the partial dispersion ratio in a short wavelength region, a sufficiently low partial dispersion ratio cannot be obtained in a high refractive index region containing a large amount of PbO.
この欠点を除く為に、ＰｂＯに代えてＳ ｂ ２０ａと
ＺｎＱとを用いた５ｉ０２−Ｂ２０３−Ａ１２０３−Ｚ
ｎＯ−５ｂ２０３系ガラスも提案されている。（特公昭
５５−１４８１８号公報）これは、５ｂ２０３がｐｂｏ
よりも高分散を与える成分であるとともにＺｎＯがｐｂ
ｏより低分散を与える材料であり、かつ、両者共にＰｂ
Ｏと比較して部分分散比を増大させる傾向が弱いという
点ｌ（に注目し、前述のｐｂｏ含有ガラスの欠点の改良
を企ったものである。しかしながら５ｂ２０３、ＺｎＯ
共にそれ自体にはＢ２Ｏ３の如く短波長域での部分分散
比を減少させる効果はなく、従−って５ｂ２０３とＺｎ
Ｏを多量に含有させる必要のある高屈折率域では短波長
域において十分小さな部分分散比のガラスは得られてい
ない。In order to eliminate this drawback, 5i02-B203-A1203-Z using S b 20a and ZnQ instead of PbO was developed.
nO-5b203 type glasses have also been proposed. (Special Publication No. 55-14818) This means that 5b203 is pbo
ZnO is a component that gives higher dispersion than pb
Pb is a material that provides lower dispersion than Pb.
This study focused on the point that the tendency to increase the partial dispersion ratio is weaker than that of O, and was aimed at improving the drawbacks of the PBO-containing glass described above.However, 5b203, ZnO
Neither 5b203 nor Zn itself has the effect of reducing the partial dispersion ratio in the short wavelength range like B2O3, so 5b203 and Zn
In the high refractive index region where it is necessary to contain a large amount of O, a glass with a sufficiently small partial dispersion ratio in the short wavelength region has not been obtained.
特開昭５４−３９４２４号公報には５ｉＯ２−Ｂ２０３
−Ｚ ｒ０２系ガラスが開示されている。このガラスは
短波長域での部分分散比は小さいが、失透傾向が高く、
これを改良するため多量のアルカリ金属酸化物とＮａＦ
を含有させている。しかしながら、アルカリ金属酸化物
やＮａＦを多量に含有させたガラスは高温で揮発が激し
く、均質で大型のガラスを得難い欠点がある。5iO2-B203 in Japanese Patent Application Laid-Open No. 54-39424
-Z r02 series glasses are disclosed. This glass has a small partial dispersion ratio in the short wavelength range, but has a high tendency to devitrify.
To improve this, a large amount of alkali metal oxide and NaF
Contains. However, glasses containing large amounts of alkali metal oxides or NaF have the disadvantage that they volatilize violently at high temperatures, making it difficult to obtain homogeneous and large-sized glasses.
発明の目的および構成
本発明は上記従来の光学ガラスの欠点を改良した短波長
域の部分分散比が小、さく、高屈折率域で高い異常分散
度をするとともに大型のガラス素材を製造可能なフリン
トガラスを提供することを目的とする。Object and Structure of the Invention The present invention improves the drawbacks of the conventional optical glasses as described above, and provides a glass material with a small and small partial dispersion ratio in the short wavelength region, a high anomalous dispersion in the high refractive index region, and the ability to manufacture large-sized glass materials. The purpose is to provide flint glass.
上記目的達成の為に、本発明者は、短波長域の部分分散
比を減少させる・効果を有する高屈折率成分と、大型の
ガラス素材を得る為に製造安定性のを見い出し、その配
合比を検討して本発明に至ったものである。In order to achieve the above object, the present inventors have discovered a high refractive index component that has the effect of reducing the partial dispersion ratio in the short wavelength range and a manufacturing stability for obtaining a large glass material, and have found a compounding ratio thereof. The present invention was developed by studying the following.
即ち、本発明に係る異常分散ガラスは、Ｂ２Ｏ３１５〜
３５重量％
５ｂ２０３ １０〜４６ 〃
Ｚｎ０ ５〜３０ ｔｒ
Ｓ ｔ ０２ ４〜１５ 〃
ＡＩ！２０３ ３〜１ｏ 〃
ＺｒＯ２１〜１２ 〃
Ｔａ２０５ ｏ〜１５ ″
Ｌａ２Ｏ３０〜１５ 〃
（但し、ＺｒＯ２＋Ｔａ２０５＋Ｌａ２０３−１〜１６
％〕なる組成を満足することを特徴とするものである。That is, the anomalous dispersion glass according to the present invention has B2O315~
35% by weight 5b203 10~46 〃 Zn0 5~30 tr S t 02 4~15 〃 AI! 203 3~1o 〃 ZrO21~12 〃 Ta205 o~15'' La2O30~15 〃 (However, ZrO2 + Ta205 + La203-1~16
%].
上記が７スは屈折率ｎｄ＝ １．６５〜１．７７、アツ
ベ数νｄ−３０〜４６の光学恒数範囲において異常分散
性を有する。The above 7th element has anomalous dispersion in the optical constant range of refractive index nd = 1.65 to 1.77 and Atsube number νd -30 to 46.
本発明においてＢ２Ｏ３はガラス形成成分であり短波長
域での部分分散比を減少させる効果がある。In the present invention, B2O3 is a glass-forming component and has the effect of reducing the partial dispersion ratio in a short wavelength region.
配合比はガラス全重量の１５〜３５重量％（以下、単に
％と表示する）である。１５％より少ないと上記効果が
十分に発揮されず、失透傾向も増大する。一方３５％よ
り多いと化学的耐久性が低下する。The blending ratio is 15 to 35% by weight (hereinafter simply expressed as %) based on the total weight of the glass. If it is less than 15%, the above effects will not be sufficiently exhibited and the tendency to devitrify will increase. On the other hand, if the amount exceeds 35%, chemical durability decreases.
５ｂ２０３は短波長域での部分分散比を余り増加させな
い高屈折率高分散成分として用いる。使用範囲は１０〜
４６％である。Ｓ′ｂ２０３が１０％より少ないと生成
したガラスが低分散となり、目的とする光学恒数範囲の
ガラスが得られない。一方、４６％を越えると失透傾向
が増大し不適当である。5b203 is used as a high refractive index and high dispersion component that does not significantly increase the partial dispersion ratio in the short wavelength range. Usage range is 10~
It is 46%. If S'b203 is less than 10%, the resulting glass will have low dispersion, making it impossible to obtain a glass with the desired optical constant range. On the other hand, if it exceeds 46%, the tendency to devitrify increases, which is inappropriate.
ＺｎＯはガラスの化学的耐久性を向上させ、失透傾向を
押える成分として用いる。使用範囲は５〜３０％である
。５％より少量では化学的耐久性が悪く、失透傾向の高
いガラスとなる。また３０％より多く用いると低分散ガ
ラスとなり目的とする光学恒数範囲に達しなくなる。ZnO is used as a component that improves the chemical durability of glass and suppresses its tendency to devitrify. The usage range is 5-30%. If the amount is less than 5%, the chemical durability will be poor and the glass will have a high tendency to devitrify. If more than 30% is used, the glass becomes a low-dispersion glass and fails to reach the desired optical constant range.
Ｓ ｉＯ２はＢ２Ｏ３と置換して化学的耐久性を向上さ
せ、失透傾向を押える成分であるが、短波長域での部分
分散比をＢ２Ｏ３程小さくする効果がな（Ａため、その
導入量はできるだけ少なくすることが好ましい。しかし
４％より少ないと化学的耐久性が劣化し、１５％を越え
ると異常分散性の減少が著るしい。従って、４〜１５％
の範囲で用いられる。SiO2 is a component that improves chemical durability by replacing B2O3 and suppresses the tendency to devitrify, but it does not have the effect of reducing the partial dispersion ratio in the short wavelength region as much as B2O3 (A, therefore, the amount introduced is It is preferable to keep the amount as low as possible. However, if it is less than 4%, chemical durability will deteriorate, and if it exceeds 15%, the anomalous dispersion will be significantly reduced. Therefore, from 4 to 15%
Used within the range of
Ａ！ ２０３は分相防止のため３〜１０％加えられる。A! 3 to 10% of 203 is added to prevent phase separation.
その配合比は上記各成分の配合比により適宜選定する。The blending ratio is appropriately selected depending on the blending ratio of each of the above components.
３％より少ないと分相を生じ易く、１０％を越えると失
透傾向が増大する。If it is less than 3%, phase separation tends to occur, and if it exceeds 10%, the tendency for devitrification increases.
ＺｒＯ２は短波長域での部分分散比を減少させる高屈折
率成分であると共に比較的高分散で化学的耐久性に優れ
たガラスを与えるものであり、１〜１２％使用される。ZrO2 is a high refractive index component that reduces the partial dispersion ratio in a short wavelength range, and provides a glass with relatively high dispersion and excellent chemical durability, and is used in an amount of 1 to 12%.
１％より少ないと上述の効果が得られず、１２％より多
いと失透傾向が著しくなり好ましくない。特に２％以上
で化学的耐久性の向上が著しいので、好ましい使用鼠は
２〜１２％である。If it is less than 1%, the above-mentioned effects cannot be obtained, and if it is more than 12%, the tendency to devitrify becomes significant, which is not preferable. In particular, since the chemical durability is significantly improved when the content is 2% or more, the preferred content is 2 to 12%.
ガラスに要請される所望の性質に応じて、５ｂ２０３゜
ＺｎＯ及びＺ ｒ Ｏ２の一部をＴａ２０５および／ま
たはＬａ２Ｏ３で代えてもよい。Depending on the desired properties required of the glass, some of the 5b203°ZnO and Z r O2 may be replaced with Ta205 and/or La2O3.
■ａ３０．はＺ ｒｏ２と同様短波長域での部分分散比
を減少させる高屈折率成分であり、比較的高分散である
がその効果はＺ ｒｏ ２より小さい。Ｔａ２０５はガ
ラス全量の１５％以下を配合する。１５％を越えると失
透傾向が増大する。■a30. is a high refractive index component that reduces the partial dispersion ratio in the short wavelength range like Z ro2, and although it has relatively high dispersion, its effect is smaller than Z ro 2. Ta205 is blended in an amount of 15% or less of the total amount of glass. If it exceeds 15%, the tendency to devitrify increases.
Ｌａ２Ｏ３は短波長域での部分分散比を増加させる効果
が極めて小さい高屈折率成分であるが比較的低分散であ
るため１５％以上含有させるのは不適当である。La2O3 is a high refractive index component that has a very small effect of increasing the partial dispersion ratio in a short wavelength range, but it has a relatively low dispersion, so it is inappropriate to contain it in an amount of 15% or more.
上記Ｔａ２０５及びＬａ２Ｏ３は、Ｚ ｒｏ ２と同様
、多量に含有されると失透傾向が著しくなる成分である
。The Ta205 and La2O3 mentioned above, like Z ro 2, are components that, when contained in large amounts, tend to exhibit a remarkable tendency to devitrify.
そのために、ＺｒＯ□、Ｔａ２０５及びＬａ３Ｏ３ノ合
計量は１６％以下に限定される。しカルながら、Ｚ ｒ
ｏ２を必須成分として上記３成分の合計量を１〜１６％
特に２〜１６％として複数の成分を組合せれば、逆に失
透傾向を低くすることができる。従って、高屈折率で、
かつ、短波長域での部分分散比が小さく製造時に安定し
たガラスが得られる。Therefore, the total amount of ZrO□, Ta205 and La3O3 is limited to 16% or less. While doing so, Z r
The total amount of the above three components is 1 to 16% with O2 as an essential component.
In particular, if a plurality of components are combined in an amount of 2 to 16%, the tendency to devitrify can be reduced. Therefore, at high refractive index,
Moreover, a glass having a small partial dispersion ratio in a short wavelength range and stable during manufacture can be obtained.
本発明ガラスは光学恒数の調整などの要請により他の適
宜の成分、例えばＹ２Ｏ３、Ｇｄ２Ｏ３、Ｎｂ２Ｏ，。The glass of the present invention may contain other appropriate components, such as Y2O3, Gd2O3, Nb2O, etc., depending on requirements such as adjustment of optical constants.
ＷＯ３，ＰｂＯ等を少量添加してもよい。A small amount of WO3, PbO, etc. may be added.
以下実施例をあげて本発明を説明する。実施例中、組成
比は全て重量％で表わす。The present invention will be explained below with reference to Examples. In the examples, all composition ratios are expressed in weight %.
実施例
表−１に示す組成比でガラスを製造した。表中、Ｓ ｉ
０２、Ｓ ｂ ２０３、ＺｎＯ，ＺｒＯ２、Ｔａ２０５
、Ｌａ２Ｏ３おＪＩＪ Ａｌ ２０３は各酸化物を、Ｂ
２Ｏ３は硼酸を用い所定量を均一に混合した筆、白金ル
ツボを用いて１２５０℃〜１３５０℃で溶解し充分泡切
り均質化してから適当な温度に下げ、予熱した金型に鋳
込み徐冷することにより製造した。Glass was manufactured with the composition ratio shown in Example Table-1. In the table, S i
02, S b 203, ZnO, ZrO2, Ta205
, La2O3 and JIJ Al 203 each oxide, B
2O3 is melted at 1250℃ to 1350℃ using a brush and a platinum crucible in which a predetermined amount of boric acid is uniformly mixed, bubbles are thoroughly removed to homogenize, the temperature is lowered to an appropriate temperature, and the mixture is poured into a preheated mold and slowly cooled. Manufactured by.
得られた異常分散性を有するフリントガラスの光学恒数
を組成と合わせて表−１に示す。表中、ｎｄはｄ線に対
する屈折率、シロはｄ線に対するアツベ数、ＰｇＦは短
波長域における部分分散比、ΔＰｇＦは短波長域におけ
る異常分散度をそれぞれ示す。νｄ、 ＰｇＦ 、 ＃
ｇＦは、各スペクトル線ｇ。The optical constants of the obtained flint glass having anomalous dispersion are shown in Table 1 along with the composition. In the table, nd indicates the refractive index for the d-line, white indicates the Abbe number for the d-line, PgF indicates the partial dispersion ratio in the short wavelength range, and ΔPgF indicates the anomalous dispersion degree in the short wavelength range. νd, PgF, #
gF is each spectral line g.
Ｆ、ｄ、Ｃに対する屈折率ｎｇ、 ｎｐ 、 ｎｄ、
ｎｃをそれぞれ測定し、測定値をもとに下式を用いて求
められる。Refractive index for F, d, C ng, np, nd,
nc is measured and calculated using the following formula based on the measured values.
ｎｄ−１
ΔＰｇＦ ＝ ＰｇＦ −Ｐ’ｇＦ
但し、Ｐ′ｇＦ は正常分散ガラスの部分分散比を示
し、これは通常、正常分散ガラスの標準として選定され
た光学ガラスＦ２及びに７を用い、Ｐ’ｇＦ−〇、６４
３８−０．００１６８２シｄと近似される。高屈折率高
分散のフリントガラス域においては、部分分散比ＰｇＦ
が小さくて異常分散度ΔＰｇＨの負の値が大きいほど異
常分散性が高い。nd-1 ΔPgF = PgF - P'gF However, P'gF indicates the partial dispersion ratio of normal dispersion glass, which is usually calculated using optical glasses F2 and 7, which are selected as standards for normal dispersion glass, and P' gF-○, 64
It is approximated as 38-0.001682 sid. In the flint glass region with high refractive index and high dispersion, the partial dispersion ratio PgF
is smaller and the negative value of the degree of anomalous dispersion ΔPgH is greater, the higher the anomalous dispersion is.
立米Standing rice
Claims (1)
ス： Ｂ２Ｏ３１５〜３５重量％ ５ｂ２０３ ｌＯ〜４６ 〃 ７００ ５〜３ＱＬｒ Ｓ ｉＯ２４〜１５ 〃 ＡＩ！２０３ ３〜１０ 〃 ＺｒＯ２１〜１２ 〃 Ｔａ２０５ ０〜１５ 〃 Ｌａ２Ｏ３０〜１５ 〃 但し、ＺｒＯ２，Ｔａ２０５、及びＬａ２Ｏ３の合計量
は１〜１６％である。[Claims] 1. Anomalous dispersion glass characterized by having the following composition: B2O3 15-35% by weight 5b203 lO-46 〃 700 5-3QLr SiO24-15 〃 AI! 203 3-10 ZrO21-12 Ta205 0-15 La2O30-15 However, the total amount of ZrO2, Ta205, and La2O3 is 1 to 16%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10886382A JPS593044A (en) | 1982-06-24 | 1982-06-24 | Anomalous dispersion glass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10886382A JPS593044A (en) | 1982-06-24 | 1982-06-24 | Anomalous dispersion glass |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS593044A true JPS593044A (en) | 1984-01-09 |
Family
ID=14495491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10886382A Pending JPS593044A (en) | 1982-06-24 | 1982-06-24 | Anomalous dispersion glass |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS593044A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005121039A1 (en) * | 2004-06-14 | 2005-12-22 | Kabushiki Kaisha Ohara | Glass composition and laser glass |
| JP2005350325A (en) * | 2004-06-14 | 2005-12-22 | Ohara Inc | Yb-CONTAINING GLASS |
| JP2005350322A (en) * | 2004-06-14 | 2005-12-22 | Ohara Inc | Yb-CONTAINING GLASS |
| EP1736451A1 (en) * | 2005-06-24 | 2006-12-27 | LG Electronics, Inc. | Sealing glass for plasma display apparatus |
| JP2012197211A (en) * | 2010-06-23 | 2012-10-18 | Ohara Inc | Optical glass, preform and optical element |
-
1982
- 1982-06-24 JP JP10886382A patent/JPS593044A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005121039A1 (en) * | 2004-06-14 | 2005-12-22 | Kabushiki Kaisha Ohara | Glass composition and laser glass |
| JP2005350325A (en) * | 2004-06-14 | 2005-12-22 | Ohara Inc | Yb-CONTAINING GLASS |
| JP2005350322A (en) * | 2004-06-14 | 2005-12-22 | Ohara Inc | Yb-CONTAINING GLASS |
| EP1736451A1 (en) * | 2005-06-24 | 2006-12-27 | LG Electronics, Inc. | Sealing glass for plasma display apparatus |
| US7648931B2 (en) | 2005-06-24 | 2010-01-19 | Lg Electronics Inc. | Plasma display apparatus and driving method thereof |
| JP2012197211A (en) * | 2010-06-23 | 2012-10-18 | Ohara Inc | Optical glass, preform and optical element |
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