JP3243630B2 - Composition for optical glass - Google Patents
Composition for optical glassInfo
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- JP3243630B2 JP3243630B2 JP16851695A JP16851695A JP3243630B2 JP 3243630 B2 JP3243630 B2 JP 3243630B2 JP 16851695 A JP16851695 A JP 16851695A JP 16851695 A JP16851695 A JP 16851695A JP 3243630 B2 JP3243630 B2 JP 3243630B2
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Description
【０００１】[0001]
【発明の属する技術分野】本発明は光学ガラス用組成物
に関し、特に光学系の色収差補正に用いる異常部分分散
ガラスレンズ用組成物に関するものである。一般に光学
ガラスは短波長域の部分分散性を表す部分分散比ＰgF＝
（ｎg −ＮF ）／（ｎP −ｎC ）とアッベ数νd との
間、及び長波長域の部分分散性を表す部分分散比ＰCA′
＝（ｎC −ｎA ′）／（ｎP −ｎC ）とνd との間にお
よそ直線関係があるが、この直線関係から著しくはずれ
ているガラスは異常部分分散ガラスと言われている。本
発明は、このうち短波長域で負の異常性を示し、長波長
域で正の異常性を示すガラス用組成物に関するものであ
る。これらの異常部分分散ガラスレンズを他のレンズと
組み合わせて用いた場合、紫外から赤外への幅広い波長
範囲において色収差を補正することが可能となる。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composition for an optical glass, and more particularly to a composition for an abnormal partial dispersion glass lens used for correcting chromatic aberration of an optical system. In general, an optical glass has a partial dispersion ratio P gF =
(N g -N F) / ( n P -n C) and Abbe number ν between d, and a partial dispersion ratio P CA representing the partial dispersion of the long wavelength '
= (N C −n A ′) / (n P −n C ) and v d have a roughly linear relationship, but a glass that deviates significantly from this linear relationship is called an anomalous partial dispersion glass. . The present invention relates to a glass composition which exhibits a negative anomaly in a short wavelength region and a positive anomaly in a long wavelength region. When these abnormal partial dispersion glass lenses are used in combination with other lenses, it becomes possible to correct chromatic aberration in a wide wavelength range from ultraviolet to infrared.
【０００２】[0002]
【従来の技術】従来この種のガラスとしてＰｂＯを多量
に含むＢ2 Ｏ3 −ＰｂＯ系ガラスが製造されてきた。こ
れらのガラスは既にさまざまな文献、書籍、特許公報等
により公知であり、例えば１９９１年版ガラス組成デー
タブック（第１００頁）にその代表的な組成が示されて
いる。Conventionally contains a large amount of PbO as this type of glass B 2 O 3 -PbO based glass have been manufactured. These glasses are already known from various documents, books, patent publications, and the like, and their typical compositions are shown in, for example, 1991 Edition Glass Composition Data Book (page 100).
【０００３】表１に同データブックに示されたガラス組
成を転記する。In Table 1, the glass compositions shown in the data book are transcribed.
【０００４】[0004]
【表１】 [Table 1]
【０００５】[0005]
【発明が解決しようとする課題】上述のガラスにおいて
ＰｂＯはガラスの耐失透性を向上させ、かつ異常部分分
散性を強める効果を有するために不可欠な成分である。
しかしながら近年の地球環境汚染に対するさまざまな規
制の中でＰｂＯの使用が困難な状況になっている。この
種の光学ガラスにおいてもＰｂＯを使用しない組成の開
発が望まれている。In the above-mentioned glass, PbO is an essential component for improving the devitrification resistance of the glass and having the effect of enhancing the abnormal partial dispersibility.
However, it has been difficult to use PbO under recent various regulations for global environmental pollution. Development of a composition that does not use PbO in this type of optical glass is also desired.
【０００６】[0006]
【課題を解決するための手段】上述の課題を解決するた
めに鋭意検討の結果、本発明者は、ＰｂＯの代替成分と
して、ＰｂＯよりも低毒性であるＢｉ2 Ｏ3 が有効であ
ることを見い出し、適量のＢｉ2 Ｏ3 を適量のＢ2 Ｏ3
とＡｌ2 Ｏ3 および必要に応じてＺｎＯ、アルカリ金属
酸化物等と組み合せることにより、従来のＰｂＯ含有ガ
ラスと同等の異常部分分散性を有するガラスが得られる
ことを見い出した。As a result of diligent studies to solve the above-mentioned problems, the present inventors have found that Bi 2 O 3, which is less toxic than PbO, is effective as an alternative component to PbO. Find and add an appropriate amount of Bi 2 O 3 to an appropriate amount of B 2 O 3
And Al 2 O 3 and if necessary with the ZnO, by combining an alkali metal oxide or the like, found that glass having a conventional PbO-containing glass and equivalent anomalous partial dispersion is obtained.
【０００７】本発明はこれらの知見に基づいて完成され
たものであり、重量％でＢ2Ｏ3を２０〜６０％、Ａｌ2
Ｏ3を１〜２５％、Ｂｉ2Ｏ3を５〜６０％、Ｓｂ2Ｏ3を
０〜２５％、Ｂｉ2Ｏ3とＳｂ2Ｏ3を合量で１０〜６０％
を含み、ＰｂＯを含まないことを特徴とする光学ガラス
用組成物を要旨とする。The present invention has been completed on the basis of these findings, and contains 20 to 60% by weight of B 2 O 3 and Al 2 by weight%.
O 3 1 to 25% of Bi 2 O 3 5 to 60% of Sb 2 O 3 0 to 25% 10 to 60% of Bi 2 O 3 and Sb 2 O 3 in total
Only including, a gist of the optical glass composition characterized by containing no PbO.
【０００８】以下本発明を詳説する。以下本発明の光学
ガラス用組成物は、必須成分として、重量％でＢ2 Ｏ3
を２０〜６０％、Ａｌ2 Ｏ3 を１〜２５％、Ｂｉ2 Ｏ3
を５〜６０％、Ｓｂ2 Ｏ3 を０〜２５％、Ｂｉ2 Ｏ3 と
Ｓｂ2 Ｏ3 を合量で１０〜６０％含むものである。これ
ら必須成分の割合を上述のように限定した理由は以下の
とおりである。Hereinafter, the present invention will be described in detail. Hereinafter, the composition for optical glass of the present invention contains B 2 O 3 by weight% as an essential component.
20 to 60% of Al 2 O 3 1~25%, Bi 2 O 3
5-60% of Sb 2 O 3 0 to 25% is intended to include from 10% to 60% of Bi 2 O 3 and Sb 2 O 3 in total. The reasons for limiting the proportions of these essential components as described above are as follows.
【０００９】Ｂ2 Ｏ3 は異常部分分散性を有するガラス
の網目形成成分であり、ガラス組成物中の含有量は２０
〜６０％に限定される。その理由は、２０％未満では異
常部分分散性が得られないだけでなく結晶化傾向が強く
なり、安定に製造可能なガラスが得られず、一方６０％
を超えると、化学的耐久性が著しく劣化し、又分相傾向
が強まるからである。Ｂ2 Ｏ3 を２０〜５５％が好まし
く、２５〜５５％が特に好ましい。B 2 O 3 is a network forming component of glass having an abnormal partial dispersibility, and the content in the glass composition is 20%.
Limited to ~ 60%. The reason is that if it is less than 20%, not only the abnormal partial dispersibility cannot be obtained, but also the crystallization tendency becomes strong, and a glass that can be stably produced cannot be obtained.
If it exceeds 300, the chemical durability will be remarkably deteriorated and the tendency for phase separation will be enhanced. B 2 O 3 and 20 to 55%, and particularly preferably 25 to 55%.
【００１０】Ａｌ2 Ｏ3 は化学的耐久性を向上させ、か
つガラスの分相傾向を抑える効果があり、その含有量は
１〜２５％に限定される。その理由は、１％未満では化
学的耐久性向上効果および分相防止効果が不十分であ
り、一方２５％を超えると結晶化傾向が強まり安定に製
造可能なガラスが得られないからである。Ａｌ2 Ｏ3 は
４〜２０％が好ましく、５〜１７％が特に好ましい。[0010] Al 2 O 3 has the effect of improving chemical durability and suppressing the tendency of phase separation of glass, and its content is limited to 1 to 25%. The reason is that if it is less than 1%, the effect of improving the chemical durability and the effect of preventing phase separation are insufficient, while if it exceeds 25%, the tendency of crystallization is increased and a glass that can be manufactured stably cannot be obtained. Al 2 O 3 is preferably from 4 to 20%, particularly preferably from 5 to 17%.
【００１１】Ｂｉ2 Ｏ3 は、従来の異常部分分散ガラス
におけるＰｂＯの代替成分として異常部分分散ガラスを
得るために必須の成分であり、その異常部分分散性付与
効果および低毒性の故にＰｂＯの代替成分として好まし
く用いられる成分である。その含有量は５〜６０％に限
定される。その理由は５％未満であると異常部分分散ガ
ラスが得られず、一方６０％を超えると結晶化傾向が強
まり、安定に製造可能なガラスが得られなくなるだけで
なく、茶色に着色する傾向が強まるからである。Ｂｉ2
Ｏ3 は１５〜５５％が好ましく、２０〜５０％が特に好
ましい。Bi 2 O 3 is an essential component for obtaining an abnormal partial dispersion glass as a substitute for PbO in the conventional anomalous partial dispersion glass. Bi 2 O 3 is a substitute for PbO because of its effect of imparting an abnormal partial dispersion and low toxicity. It is a component preferably used as a component. Its content is limited to 5-60%. The reason is that if it is less than 5%, an abnormally dispersed glass cannot be obtained, while if it exceeds 60%, the crystallization tends to be intensified, and not only a glass that can be stably manufactured cannot be obtained, but also a tendency to color brown. Because it strengthens. Bi 2
O 3 is preferably 15 to 55%, particularly preferably 20 to 50%.
【００１２】Ｓｂ2 Ｏ3 は脱泡、消色を目的とし、また
屈折率の調整を目的としてＢｉ2 Ｏ3 の一部を置換して
含有させることができるが、その含有量は０〜２５％に
限定される。その理由は、２５％を超えると結晶化傾向
が強まり、安定に製造可能なガラスが得られないからで
ある。Ｓｂ2 Ｏ3 は０〜２０％が好ましく、０〜１５％
が特に好ましい。Sb 2 O 3 can be contained by substituting a part of Bi 2 O 3 for the purpose of defoaming and decoloring, and for the purpose of adjusting the refractive index. %. The reason is that if it exceeds 25%, the tendency of crystallization is increased, and a glass that can be manufactured stably cannot be obtained. Sb 2 O 3 is preferably 0 to 20%, and 0 to 15%.
Is particularly preferred.
【００１３】上述の２成分であるＢｉ2 Ｏ3 とＳｂ2 Ｏ
3 の合量は、１０〜６０％に限定される。その理由は１
０％未満では目的とする分散特性が得られず、一方６０
％を超えると結晶化傾向が強まり安定なガラスが得られ
ないからである。Ｂｉ2 Ｏ3とＳｂ2 Ｏ3 の合量は１５
〜５５％が好ましく、２０〜５５％が特に好ましい。The above two components Bi 2 O 3 and Sb 2 O
The total amount of 3 is limited to 10 to 60%. The reason is 1
If it is less than 0%, the desired dispersion characteristics cannot be obtained, while
%, The crystallization tendency is increased, and a stable glass cannot be obtained. The total amount of Bi 2 O 3 and Sb 2 O 3 is 15
-55% is preferable, and 20-55% is particularly preferable.
【００１４】本発明の光学ガラス用組成物は、上述の必
須成分以外に任意成分として、下記の成分を下記の含量
で含むことができる。The composition for optical glass of the present invention may contain the following components as optional components in the following contents in addition to the above-mentioned essential components.
【００１５】 ＳｉＯ2 ０〜５％未満 ＧｅＯ2 ０〜２０％ Ｌｉ2 Ｏ ０〜３％ Ｎａ2 Ｏ ０〜５％ Ｋ2 Ｏ ０〜１０％ Ｃｓ2 Ｏ ０〜７％ Ｌｉ2 Ｏ＋Ｎａ2 Ｏ＋Ｋ2 Ｏ＋Ｃｓ2 Ｏ ０〜１０％ ＭｇＯ ０〜７％ ＣａＯ ０〜７％ ＳｒＯ ０〜７％ ＢａＯ ０〜１２％ ＭｇＯ＋ＣａＯ＋ＳｒＯ＋ＢａＯ ０〜１２％ ＺｎＯ ０〜４０％ Ｌａ2 Ｏ3 ０〜２５％ Ｙ2 Ｏ3 ０〜２５％ Ｇｄ2 Ｏ3 ０〜１０％ Ｉｎ2 Ｏ3 ０〜１０％ Ｇａ2 Ｏ3 ０〜１０％ ＺｒＯ2 ０〜５％ ＴｉＯ2 ０〜５％ Ｎｂ2 Ｏ5 ０〜５％ Ｔａ2 Ｏ5 ０〜５％ ＷＯ3 ０〜１５％[0015] than SiO 2 0~5% GeO 2 0~20% Li 2 O 0~3% Na 2 O 0~5% K 2 O 0~10% Cs 2 O 0~7% Li 2 O + Na 2 O + K 2 O + Cs 2 O 0~10% MgO 0~7% CaO 0~7% SrO 0~40% 0~7% BaO 0~12% MgO + CaO + SrO + BaO 0~12% ZnO La 2 O 3 0~25% Y 2 O 3 0 ~25% Gd 2 O 3 0~10% In 2 O 3 0~10% Ga 2 O 3 0~10% ZrO 2 0~5% TiO 2 0~5% Nb 2 O 5 0~5% Ta 2 O 5 0~5% WO 3 0~15%
【００１６】ＳｉＯ2 は少量の添加により化学的耐久性
を向上させる効果が有るが、５％以上加えた場合ガラス
の分相傾向が強まり透明なガラスが得られにくい。従っ
てＳｉＯ2 の含量は０〜５％未満に限定される。Although SiO 2 has the effect of improving the chemical durability by adding a small amount, when it is added in an amount of 5% or more, the tendency of phase separation of the glass is increased, and it is difficult to obtain a transparent glass. Therefore the content of SiO 2 is limited to less than 0-5%.
【００１７】ＧｅＯ2 は２０％まで添加可能であり、異
常部分分散特性を大きく損なうことなく屈折率を高める
ことが可能である。しかしながら２０％を超えるとガラ
スは茶着色を呈する。従ってＧｅＯ2 の含量は０〜２０
％に限定される。GeO 2 can be added up to 20%, so that the refractive index can be increased without significantly impairing the extraordinary partial dispersion characteristics. However, above 20%, the glass exhibits a brown coloration. Therefore, the content of GeO 2 is 0 to 20.
%.
【００１８】アルカリ金属酸化物Ｌｉ2 Ｏ、Ｎａ2 Ｏ、
Ｋ2 Ｏ、Ｃｓ2 Ｏの少量の添加は特にＢｉ2 Ｏ3 を多量
に含む高屈折率のガラスを得ようとした場合に見られる
茶着色を抑制する効果があるが、過剰に加えた場合、化
学的耐久性が著しく劣化する。従ってＬｉ2 Ｏ、Ｎａ2
Ｏ、Ｋ2 Ｏ、Ｃｓ2 Ｏの含量はそれぞれ０〜３％、０〜
５％、０〜１０％、０〜７％に限定される。さらにこれ
らの合量は０〜１０％に限定される。Alkali metal oxides Li 2 O, Na 2 O,
The addition of small amounts of K 2 O and Cs 2 O has an effect of suppressing brown coloring which is particularly observed when obtaining a high refractive index glass containing a large amount of Bi 2 O 3. , And the chemical durability is remarkably deteriorated. Therefore, Li 2 O, Na 2
The contents of O, K 2 O and Cs 2 O are 0 to 3% and 0 to 3%, respectively.
Limited to 5%, 0-10%, 0-7%. Further, their total amount is limited to 0 to 10%.
【００１９】ＭｇＯ、ＣａＯ、ＳｒＯ、ＢａＯは屈折率
とアッベ数の調整のために添加することができるが、こ
れにより異常部分分散性が損なわれる傾向がある。従っ
てＭｇＯ、ＣａＯ、ＳｒＯ、ＢａＯの含量は、それぞれ
０〜５％、０〜７％、０〜７％、０〜１２％に限定され
る。さらにこれらの合量は０〜１２％に限定される。MgO, CaO, SrO and BaO can be added to adjust the refractive index and Abbe number, but this tends to impair the anomalous partial dispersion. Therefore, the contents of MgO, CaO, SrO, and BaO are limited to 0 to 5%, 0 to 7%, 0 to 7%, and 0 to 12%, respectively. Further, their total amount is limited to 0 to 12%.
【００２０】ＺｎＯはガラスの結晶化や分相を抑制する
効果を有し、また屈折率、アッベ数を調整するために４
０％まで添加することができる。しかしながら４０％を
上回ると異常部分分散性が低下する。従ってＺｎＯの含
量は０〜４０％に限定され、より好ましくは３〜３０％
である。ZnO has the effect of suppressing crystallization and phase separation of glass, and has the effect of controlling the refractive index and Abbe number.
It can be added up to 0%. However, if it exceeds 40%, the abnormal partial dispersibility decreases. Therefore, the content of ZnO is limited to 0 to 40%, more preferably 3 to 30%.
It is.
【００２１】Ｌａ2 Ｏ3 及びＹ2 Ｏ3 は化学的耐久性を
向上させ、屈折率を高める成分であるが２５％を上回る
と結晶化傾向が強まる。従ってＬａ2 Ｏ3 の含量は０〜
２５％に限定され、より好ましくは０〜２０％である。
一方、Ｙ2 Ｏ3 の合量は０〜２５％に限定され、より好
ましくは０〜２０％である。[0021] La 2 O 3 and Y 2 O 3 improves the chemical durability, but a component that raises the refractive index intensified crystallization tendency and more than 25%. Therefore, the content of La 2 O 3 is 0 to
It is limited to 25%, more preferably 0 to 20%.
On the other hand, the total amount of Y 2 O 3 is limited to 0 to 25%, and more preferably 0 to 20%.
【００２２】Ｇｄ2 Ｏ3 、Ｉｎ2 Ｏ3 、Ｇａ2 Ｏ3 はそ
れぞれ１０％まで添加することができるが、これを上回
ると結晶化傾向が強まる。従ってこれらの含量はいずれ
も０〜１０％に限定される。Gd 2 O 3 , In 2 O 3 , and Ga 2 O 3 can each be added up to 10%, but if they exceed this, the tendency of crystallization will increase. Therefore, these contents are all limited to 0 to 10%.
【００２３】ＺｒＯ2 、ＴｉＯ2 、Ｎｂ2 Ｏ5 、Ｔａ2
Ｏ5 、ＷＯ3 は化学的耐久性を向上させる成分であり、
異常部分分散性や耐失透性を損なわない範囲で添加する
ことができる。それぞれの含量は、０〜５％、０〜５
％、０〜５％、０〜５％、０〜１５％に限定される。ZrO 2 , TiO 2 , Nb 2 O 5 , Ta 2
O 5 and WO 3 are components that improve chemical durability.
It can be added within a range that does not impair the abnormal partial dispersibility or devitrification resistance. Each content is 0-5%, 0-5
%, 0-5%, 0-5%, 0-15%.
【００２４】[0024]
【実施例】以下実施例により本発明をさらに説明する。The present invention will be further described with reference to the following examples.
【００２５】表２〜５に示す酸化物組成となるように酸
化物、水酸化物、炭酸塩、硝酸塩などの各種原料を調合
し、混合して得た混合物を、白金坩堝を用い電気炉中１
１００〜１３００℃で１〜３時間熔解し撹拌、清澄後、
鉄製型に流し込み冷却した。その後およそ（Ｔｇ＋１
０）℃の温度で１時間保持後、（Ｔｇ−２００）℃まで
−３０℃／ｈの冷却速度でアニールして、実施例Ｎo.１
〜１８のガラス各１００ｇを得た。得られたガラスはい
ずれも無色透明であり、ガラス中に結晶物や分相、茶着
色は認められなかった。Various materials such as oxides, hydroxides, carbonates and nitrates are prepared and mixed so as to have the oxide compositions shown in Tables 2 to 5, and the resulting mixture is placed in an electric furnace using a platinum crucible. 1
Melt at 100-1300 ° C for 1-3 hours, stir, clarify,
It was poured into an iron mold and cooled. After that, approximately (Tg + 1
0) C. for 1 hour, and then annealed to (Tg-200) C. at a cooling rate of -30 C./h.
100 g each of ~ 18 glasses were obtained. Each of the obtained glasses was colorless and transparent, and no crystal, phase separation, or browning was observed in the glass.
【００２６】表２〜５に得られた実施例１〜１８のガラ
スの組成、屈折率（ｎd ）、アッベ数（νd ）、長波長
域の部分分散比（ＰCA′）、短波長域の部分分散比（Ｐ
gF）を示す。[0026] Table 2-5 Composition of the glasses of Examples 1 to 18 thus obtained, the refractive index (n d), Abbe number ([nu d), a partial dispersion ratio of the long wavelength region (P CA '), the short wavelength Partial dispersion ratio (P
gF ).
【００２７】表２〜５に示した実施例１〜１８のガラス
のＰCA′、ＰgFをνd に対してプロットすると図１およ
び図２の如くである。[0027] Table 2 to 5 P CA of the glasses of Examples 1 to 18 shown in 'is as shown in FIG. 1 and FIG. 2 is plotted against the P gF ν d.
【００２８】なお表６に、比較ガラス１〜５として市販
のＰｂＯ含有異常部分分散ガラスのｎd 、νd 、ＰCA′
およびＰgFを示し、これら比較ガラス１〜５のＰCA′、
ＰgFをνd に対してプロットしたものを図１および図２
に示した。In Table 6, n d , ν d , and P CA ′ of commercially available PbO-containing anomalous partial dispersion glasses as Comparative Glasses 1 to 5 are shown.
And P gF , and P CA ′ of these comparative glasses 1 to 5,
FIGS. 1 and 2 show P gF plotted against ν d .
It was shown to.
【００２９】[0029]
【表２】 [Table 2]
【００３０】[0030]
【表３】 [Table 3]
【００３１】[0031]
【表４】 [Table 4]
【００３２】[0032]
【表５】 [Table 5]
【００３３】[0033]
【表６】 [Table 6]
【００３４】図１および図２より、実施例１〜１８のガ
ラスは、いずれも通常の光学ガラスに見られるノーマル
ラインからずれていることより紫外域で負の、赤外域で
正の異常部分分散性があり、比較例１〜５で示した従来
のＰｂＯ含有異常部分分散ガラスと同等の特性を有する
ことが分かる。また実施例１〜１８のガラスは化学的耐
久性に優れており、例えば実施例２，３，４のガラスに
ついて化学的耐久性（ＤW ：光学硝子工業会規格）を測
定したところ、それぞれ０．０５９％（２級）、０．０
１５％（１級）、０．０３８％（１級）であり優れた化
学的耐久性を示した。1 and 2 that the glasses of Examples 1 to 18 all have negative anomalous partial dispersion in the ultraviolet region and positive anomalous partial dispersion in the infrared region because they deviate from the normal line found in ordinary optical glass. It can be seen that the glass has properties similar to those of the conventional PbO-containing abnormal partial dispersion glass shown in Comparative Examples 1 to 5. Further, the glasses of Examples 1 to 18 are excellent in chemical durability. For example, when the glass of Examples 2, 3, and 4 was measured for chemical durability (D W : Optical Glass Industry Association Standard), it was 0 0.059% (second class), 0.0
15% (1st grade) and 0.038% (1st grade) showed excellent chemical durability.
【００３５】[0035]
【発明の効果】以上本発明によれば、従来のＰｂＯ含有
異常部分分散ガラスと同等の特性を有するガラスをＰｂ
Ｏを用いずに容易に製造することが可能である。得られ
たガラスからなるレンズを他のレンズと組合わせて用い
ることにより、幅広い波長範囲において色収差を補正す
ることが可能である。As described above, according to the present invention, a glass having properties equivalent to those of the conventional PbO-containing anomalous partial dispersion glass can be obtained from PbO.
It can be easily manufactured without using O. By using the obtained lens made of glass in combination with another lens, it is possible to correct chromatic aberration in a wide wavelength range.
【図１】光学ガラスのＰCA′とνd との関係を示すグラ
フFigure 1 is a graph showing a relationship between P CA 'and [nu d of the optical glass
【図２】光学ガラスのＰgFとνd との関係を示すグラフFIG. 2 is a graph showing the relationship between P gF and v d of optical glass.
Claims (5)
Ｏ3を１〜２５％、Ｂｉ2Ｏ3を５〜６０％、Ｓｂ2Ｏ3を
０〜２５％、Ｂｉ2Ｏ3とＳｂ2Ｏ3を合量で１０〜６０％
を含み、ＰｂＯを含まないことを特徴とする光学ガラス
用組成物。(1) 20 to 60% by weight of B 2 O 3 and Al 2
O 3 1 to 25% of Bi 2 O 3 5 to 60% of Sb 2 O 3 0 to 25% 10 to 60% of Bi 2 O 3 and Sb 2 O 3 in total
Unrealized, optical glass composition characterized by containing no PbO and.
Ｏ3 の含量が４〜２０％、Ｂｉ2 Ｏ3 の含量が１５〜５
５％である、請求項１に記載の光学ガラス用組成物。Wherein the content of B 2 O 3 is 20 to 55%, Al 2
O 3 content of 4-20%, Bi 2 O 3 content of 15-5
The composition for an optical glass according to claim 1, which is 5%.
含量が０〜２０％、Ｙ2Ｏ3の含量が０〜２０％である、
請求項２に記載の光学ガラス用組成物。Wherein the content of ZnO is 3% to 30%, 0-20% the content of La 2 O 3, including the amount of Y 2 O 3 is 0-20%,
The composition for an optical glass according to claim 2.
求項１〜４のいずれか一項に記載の光学ガラス用組成
物。5. The composition for an optical glass according to claim 1, which is used for an abnormal partial dispersion glass lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16851695A JP3243630B2 (en) | 1995-07-04 | 1995-07-04 | Composition for optical glass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16851695A JP3243630B2 (en) | 1995-07-04 | 1995-07-04 | Composition for optical glass |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0920530A JPH0920530A (en) | 1997-01-21 |
| JP3243630B2 true JP3243630B2 (en) | 2002-01-07 |
Family
ID=15869494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16851695A Expired - Fee Related JP3243630B2 (en) | 1995-07-04 | 1995-07-04 | Composition for optical glass |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3243630B2 (en) |
Cited By (2)
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|---|---|---|---|---|
| CN102092939A (en) * | 2005-09-06 | 2011-06-15 | 株式会社小原 | Optical glass |
| US9722102B2 (en) | 2014-02-26 | 2017-08-01 | Heraeus Precious Metals North America Conshohocken Llc | Glass comprising molybdenum and lead in a solar cell paste |
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|---|---|---|---|---|
| JP2005041734A (en) * | 2003-05-26 | 2005-02-17 | Nippon Electric Glass Co Ltd | Glass for dielectric formation and dielectric formation material for plasma display panel |
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| JP4537092B2 (en) * | 2004-03-01 | 2010-09-01 | パナソニック株式会社 | Glass composition and magnetic head |
| JP4607561B2 (en) * | 2004-11-30 | 2011-01-05 | 株式会社住田光学ガラス | Optical glass for precision press molding |
| JP4928766B2 (en) * | 2005-10-07 | 2012-05-09 | パナソニック株式会社 | Oxide glass and display panel using the same |
| KR20080101928A (en) * | 2006-02-21 | 2008-11-21 | 아사히 가라스 가부시키가이샤 | Optical glass |
| JP5033339B2 (en) * | 2006-03-14 | 2012-09-26 | 株式会社オハラ | Glass composition |
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| JP2009242208A (en) * | 2008-03-31 | 2009-10-22 | Ohara Inc | Optical glass, optical element and preform for precision press molding |
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1995
- 1995-07-04 JP JP16851695A patent/JP3243630B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102092939A (en) * | 2005-09-06 | 2011-06-15 | 株式会社小原 | Optical glass |
| US9722102B2 (en) | 2014-02-26 | 2017-08-01 | Heraeus Precious Metals North America Conshohocken Llc | Glass comprising molybdenum and lead in a solar cell paste |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0920530A (en) | 1997-01-21 |
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