JPH1143344A - Optical glass - Google Patents
Optical glassInfo
- Publication number
- JPH1143344A JPH1143344A JP16044697A JP16044697A JPH1143344A JP H1143344 A JPH1143344 A JP H1143344A JP 16044697 A JP16044697 A JP 16044697A JP 16044697 A JP16044697 A JP 16044697A JP H1143344 A JPH1143344 A JP H1143344A
- Authority
- JP
- Japan
- Prior art keywords
- glass
- component
- sio
- zno
- chemical durability
- 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
- C03C3/068—Glass compositions containing silica with less than 40% silica by weight containing boron containing rare earths
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
【０００１】[0001]
【発明の属する技術分野】本発明は、ＰｂＯおよびＡｓ
2Ｏ3成分を含有せず、屈折率（ｎｄ）が１．６７〜１．
７５、アッベ数（νｄ）４２〜５０の範囲の光学恒数を
有し、化学的耐久性に優れ、かつ、低粘性で溶融性に優
れた特定組成域のＳｉＯ2−Ｂ2Ｏ3−Ｌａ2Ｏ3−ＴｉＯ2
−ＺｒＯ2−ＺｎＯ−ＢａＯ系の光学ガラスに関する。[0001] The present invention relates to PbO and As.
Contains no 2 O 3 component and has a refractive index (nd) of 1.67 to 1.
75, SiO 2 —B 2 O 3 —La having a specific composition range having an optical constant of 42 to 50 in Abbe number (νd), excellent in chemical durability, low in viscosity and excellent in melting property. 2 O 3 -TiO 2
The present invention relates to an optical glass based on —ZrO 2 —ZnO—BaO.
【０００２】[0002]
【従来の技術】従来、前記範囲の光学恒数を有するガラ
スが、たとえば、特公昭４３−７１２４号公報、特公昭
５８−４６４５９号公報、特開昭５９−５００４８号公
報等に開示されている。上記公報に開示されているガラ
スはいずれも、ＳｉＯ2成分またはＳｉＯ2およびＢ2Ｏ3
の二成分をガラス形成酸化物とし、かつ、Ｎｂ2Ｏ5およ
び／またはＴａ2Ｏ5成分を含有する組成系のガラスであ
るが、この系ガラスは、一般に高粘性であって溶融性が
悪く、均質なガラスが得難いという欠点があり、さら
に、Ｎｂ2Ｏ5、Ｔａ2Ｏ5は原料価格が高いため、ガラス
の製造コストが高くなるという問題がある。また、特公
昭５４−６２４４号公報には、Ｎｂ2Ｏ5およびＴａ2Ｏ5
成分を含有しないガラスが開示されているが、このガラ
スは、低粘性で溶融性が良いものの、ガラスの化学的耐
久性が悪いという欠点がある。2. Description of the Related Art Conventionally, glass having an optical constant within the above-mentioned range has been disclosed in, for example, Japanese Patent Publication No. Sho 43-7124, Japanese Patent Publication No. Sho 58-46449, and Japanese Patent Laid-Open Publication No. Sho 59-50048. . Each of the glasses disclosed in the above publications has an SiO 2 component or SiO 2 and B 2 O 3
Is a glass of a composition system containing a glass-forming oxide as the two components and containing a Nb 2 O 5 and / or Ta 2 O 5 component, but this system glass is generally highly viscous and poor in melting property. However, there is a problem that it is difficult to obtain a homogeneous glass. Further, since Nb 2 O 5 and Ta 2 O 5 have a high raw material price, there is a problem that the glass production cost increases. Further, in JP-B-54-6244, Nb 2 O 5 and Ta 2 O 5
Although glass containing no component is disclosed, this glass has low viscosity and good meltability, but has a drawback that the glass has poor chemical durability.
【０００３】[0003]
【発明が解決しようとする課題】本発明の目的は、前記
従来技術に見られる諸欠点を総合的に解消し、前記所定
範囲の光学恒数を有し、環境対策のための処理に高いコ
ストを要するＰｂＯおよびＡｓ2Ｏ3成分を含有せず、化
学的耐久性に優れ、かつ、低粘性で溶融性に優れた均質
な光学ガラスを提供することにある。SUMMARY OF THE INVENTION It is an object of the present invention to comprehensively eliminate the drawbacks of the prior art, to have an optical constant within the predetermined range, and to increase the cost for processing for environmental measures. An object of the present invention is to provide a homogeneous optical glass which does not contain PbO and As 2 O 3 components which require high temperature, has excellent chemical durability, has low viscosity and is excellent in melting property.
【０００４】[0004]
【課題を解決するための手段】本発明者は、前記従来技
術の実状にかんがみ鋭意試験研究を行ったところ、Ｓｉ
Ｏ2−Ｂ2Ｏ3−Ｌａ2Ｏ3−ＴｉＯ2−ＺｒＯ2−ＺｎＯ−
ＢａＯ系のガラスにおいて、ＳｉＯ2、Ｂ2Ｏ3、ＺｎＯ
およびＢａＯ成分を特定の比率で共存させることによ
り、Ｎｂ2Ｏ5、Ｔａ2Ｏ5といった原料価格の高い成分
や、ＰｂＯおよび、Ａｓ2Ｏ3成分を含有せず、高屈折率
を維持しつつ、化学的耐久性に優れ、かつ、低粘性で溶
融性に優れた均質なガラスが得られることを見いだし、
本発明をなすに至った。Means for Solving the Problems The present inventor conducted intensive tests and researches in view of the state of the prior art.
O 2 -B 2 O 3 -La 2 O 3 -TiO 2 -ZrO 2 -ZnO-
In BaO-based glass, SiO 2 , B 2 O 3 , ZnO
And the BaO component coexist at a specific ratio, so that high refractive index components such as Nb 2 O 5 and Ta 2 O 5 , PbO and As 2 O 3 components are not contained, and a high refractive index is maintained. It has been found that a homogeneous glass with excellent chemical durability, low viscosity and excellent meltability can be obtained,
The present invention has been made.
【０００５】すなわち、前記目的を達成するための本発
明の光学ガラスの特徴は、重量％で、ＳｉＯ2 １７．
０〜３０．０％、Ｂ2Ｏ3 １１．０〜２０．０％、ただ
し、ＳｉＯ2＋Ｂ2Ｏ3 ３３．５ 〜４５．０％、か
つ、ＳｉＯ2の含有量＞Ｂ2Ｏ3の含有量、Ａｌ2Ｏ3 ０
〜２．０％、Ｌａ2Ｏ3 １２．０〜１９．０％、ＴｉＯ
2１．０〜７．０％、ＺｒＯ2 １．０〜７．０％、Ｚｎ
Ｏ ６．０〜１５．０％、ＢａＯ ２６．０〜３８．０
％、ＭｇＯ＋ＣａＯ＋ＳｒＯ ０〜１０．０％、ただ
し、ＲＯ（ＲＯはＭｇＯ、ＣａＯ、ＳｒＯおよびＢａ
Ｏ）の合計量 ２６．０〜３８．０％、かつ、ＲＯの合
計量＋ＺｎＯ≦４４．０％、かつ、ＳｉＯ2／（ＲＯの
合計量＋ＺｎＯ）＞０．４５０（重量比）、Ｌｉ2Ｏ＋
Ｎａ2Ｏ＋Ｋ2Ｏ ０〜３．０％およびＳｂ2Ｏ3 ０〜
１．０％の組成からなり、屈折率（ｎｄ）が１．６７〜
１．７５、アッベ数（νｄ）が４２〜５０の範囲の光学
恒数を有するところにある。That is, the feature of the optical glass of the present invention for achieving the above object is that, in terms of% by weight, SiO 2 17.
0~30.0%, B 2 O 3 11.0~20.0 %, however, SiO 2 + B 2 O 3 33.5 ~45.0%, and the content of SiO 2> of B 2 O 3 Content, Al 2 O 3 0
~2.0%, La 2 O 3 12.0~19.0 %, TiO
2 1.0-7.0%, ZrO 2 1.0-7.0%, Zn
O 6.0-15.0%, BaO 26.0-38.0
%, MgO + CaO + SrO 0 to 10.0%, provided that RO (RO is MgO, CaO, SrO and Ba)
O) 26.0-38.0%, and the total amount of RO + ZnO ≦ 44.0%, and SiO 2 / (the total amount of RO + ZnO)> 0.450 (weight ratio), Li 2 O +
Na 2 O + K 2 O 0~3.0 % and Sb 2 O 3 0 to
It has a composition of 1.0% and a refractive index (nd) of 1.67 to
1.75, where the Abbe number (νd) has an optical constant in the range of 42 to 50.
【０００６】[0006]
【発明の実施の形態】上記のとおり各成分の組成範囲を
限定した理由は、次の通りである。本発明のガラスにお
いて、ＳｉＯ2成分およびＢ2Ｏ3成分は、共にガラス形
成酸化物として必須の成分であるが、ＳｉＯ2成分は、
その量が１７．０％未満であるとガラスの化学的耐久性
が劣化し、また、３０．０％を超えると、ガラスの失透
傾向が増大する。Ｂ2Ｏ3成分は、ガラスの粘性を下げ溶
融を容易にするとともに、ガラスの安定性を向上させる
効果を有するが、その量が１１．０％未満ではその効果
が十分ではなく、また、２０．０％を超えるとガラスの
化学的耐久性が劣化する。また、ＳｉＯ2成分とＢ2Ｏ3
成分との合計量が３３．５％未満であるとガラスの化学
的耐久性が劣化し、４５．０％を超えると本発明の目標
とする光学恒数を満足できなくなる。さらに、優れた化
学的耐久性を維持するため、ＳｉＯ2成分の含有量がＢ2
Ｏ3成分の含有量より多いことが必要である。The reasons for limiting the composition range of each component as described above are as follows. In the glass of the present invention, the SiO 2 component and the B 2 O 3 component are both essential components as a glass-forming oxide, but the SiO 2 component is
If the amount is less than 17.0%, the chemical durability of the glass deteriorates, and if it exceeds 30.0%, the tendency of the glass to devitrify increases. The B 2 O 3 component has the effect of lowering the viscosity of the glass and facilitating melting and improving the stability of the glass. However, when the amount is less than 11.0%, the effect is not sufficient. If it exceeds 0.0%, the chemical durability of the glass deteriorates. Further, the SiO 2 component and B 2 O 3
If the total amount of the components is less than 33.5%, the chemical durability of the glass deteriorates, and if it exceeds 45.0%, the optical constants targeted by the present invention cannot be satisfied. Furthermore, in order to maintain good chemical durability, the content of SiO 2 component is B 2
It is necessary to be higher than the content of the O 3 component.
【０００７】Ｌａ2Ｏ3成分は、ガラスの屈折率を高める
ので、本発明において不可欠であるが，その量が１２．
０％未満では所望の屈折率が得られず、また、その量が
１９．０％を超えるとガラスの失透傾向が増大する。Ｔ
ｉＯ2成分は目標とする光学恒数の維持と、ガラスの溶
融性および化学的耐久性の向上に有効であるが、その量
が１％未満では上記効果が十分ではなく、また、その量
が７．０％を超えるとガラスの光線透過性が悪化して着
色しやすくなるので好ましくない。The La 2 O 3 component is indispensable in the present invention because it increases the refractive index of glass.
If it is less than 0%, a desired refractive index cannot be obtained, and if it exceeds 19.0%, the tendency of glass to devitrify increases. T
The iO 2 component is effective for maintaining the target optical constant and improving the melting property and chemical durability of the glass. However, if the amount is less than 1%, the above effect is not sufficient, and the amount is small. If it exceeds 7.0%, the light transmittance of the glass deteriorates and the glass tends to be colored, which is not preferable.
【０００８】ＺｒＯ2成分は、ガラスの屈折率を高める
とともに、化学的耐久性を向上させ、かつ、失透傾向を
抑制するのに有効な成分であるが、その量が１．０％未
満では上記効果が十分ではなく、また、７．０％を超え
るとガラスの粘性が高くなり溶融性が悪化する。ＺｎＯ
成分は失透傾向を抑制し、また、ガラスの粘性を下げる
とともに化学的耐久性を高めるため重要な成分である
が、その量が６．０％未満では上記効果が十分ではな
く、また、１５．０％を超えるとかえって失透しやすく
なる。[0008] The ZrO 2 component is an effective component for increasing the refractive index of the glass, improving the chemical durability and suppressing the tendency to devitrify. If the above effect is not sufficient, and if it exceeds 7.0%, the viscosity of the glass increases and the meltability deteriorates. ZnO
The component is an important component for suppressing the tendency of devitrification and for lowering the viscosity of the glass and increasing the chemical durability. If the amount is less than 6.0%, the above effect is not sufficient. If it exceeds 0.0%, devitrification tends to occur.
【０００９】ＢａＯ成分はガラスの屈折率を高めるのに
有効であり、また、ＺｎＯ成分を共存させることにより
優れた化学的耐久性を維持しつつ、耐失透性に優れたガ
ラスを得ることができるが、その量が２６．０％未満で
は所望の光学恒数を満足できず、また、３８．０％を超
えるとガラスの化学的耐久性が悪化する。また、光学恒
数の調整等のために、ＢａＯ成分の一部をＭｇＯ、Ｃａ
Ｏおよび／またはＳｒＯ成分により置換できるが、ガラ
スの失透に対する安定性を損なわないために、これらの
１成分または２成分以上の合計量は１０．０％までとし
なければならない。さらに、優れた化学的耐久性および
耐失透性を維持するために、ＲＯ成分（ＲＯはＭｇＯ、
ＣａＯ、ＳｒＯおよびＢａＯ）の合計量は３８．０％以
内、ＲＯ成分の合計量とＺｎＯ成分との合計量は４４．
０％以内とし、また、ＲＯ成分の合計量とＺｎＯ成分と
の合計量に対するＳｉＯ2成分の重量比は、０．４５０
より大きくなければならない。The BaO component is effective for increasing the refractive index of the glass, and the coexistence of the ZnO component makes it possible to obtain a glass excellent in devitrification resistance while maintaining excellent chemical durability. However, if the amount is less than 26.0%, the desired optical constant cannot be satisfied, and if it exceeds 38.0%, the chemical durability of the glass deteriorates. Further, for the purpose of adjusting the optical constant, etc., part of the BaO component is changed to MgO, Ca
Although it can be replaced by O and / or SrO components, the total amount of one or more of these components must be up to 10.0% in order not to impair the stability of the glass against devitrification. Furthermore, in order to maintain excellent chemical durability and devitrification resistance, RO components (RO is MgO,
The total amount of CaO, SrO and BaO) is within 38.0%, and the total amount of the RO component and the ZnO component is 44.
0% or less, and the weight ratio of the SiO 2 component to the total amount of the RO component and the ZnO component is 0.450.
Must be bigger.
【００１０】Ａｌ2Ｏ3成分は、化学的耐久性を向上させ
るので任意に添加し得るが、その量が２．０％を超える
とガラスの粘性が高くなり、また失透傾向が増大する。
Ｌｉ2Ｏ、Ｎａ2ＯおよびＫ2Ｏ成分は、ガラスの溶融性
を向上させるのに有効であり、任意に添加し得るが、こ
れらの１成分または２成分以上の合計量が３％を超える
と化学的耐久性が悪化し、また失透傾向が増大する。Ｓ
ｂ2Ｏ3成分はガラス溶融の際に脱泡を促進する効果があ
るが、その量は１．０％までで十分である。The Al 2 O 3 component can be arbitrarily added to improve the chemical durability, but if its content exceeds 2.0%, the viscosity of the glass increases and the tendency to devitrify increases.
The Li 2 O, Na 2 O and K 2 O components are effective for improving the melting property of the glass and can be added arbitrarily, but the total amount of one or more of these components exceeds 3%. And the chemical durability deteriorates, and the tendency to devitrify increases. S
The b 2 O 3 component has an effect of promoting defoaming when the glass is melted, but an amount of up to 1.0% is sufficient.
【００１１】[0011]
【実施例】次に、本発明にかかる光学ガラスの好適な実
施例（Ｎｏ．１〜Ｎｏ．１４）および実施例Ｎｏ．１と
ほぼ同等の光学恒数（ｎｄ、νｄ）を有する従来公知の
ガラスの比較例（Ｎｏ．Ａ、Ｎｏ．Ｂ）を、これらのガ
ラスの光学恒数（ｎｄ、νｄ）、ＲＯの合計量＋Ｚｎ
Ｏ、ＳｉＯ2／（ＲＯの合計量＋ＺｎＯ）の重量比およ
び耐酸性（ＳＲ値）とともに表１および表２に示す。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
示したものであり、表１および表２中のＳＲ値＝５、５
１および５３は、ｐＨ＝４．６の酢酸緩衝液中において
ガラス試料が０．１μｍの侵食を受けるのに要した時間
（ｈ）が、それぞれ、ｈ＞１０、ｈ＝１〜１０およびｈ
＜０．１であることを示す。したがって、ＳＲ値が小さ
いほどガラスの耐酸性は高く、化学的耐久性に優れてい
ることを示す。EXAMPLES Next, preferred examples (No. 1 to No. 14) of the optical glass according to the present invention and Example No. 1 will be described. Comparative examples (No. A, No. B) of conventionally known glasses having optical constants (nd, νd) substantially equal to 1 were obtained by comparing optical constants (nd, νd) and RO of these glasses. + Zn
Tables 1 and 2 show the weight ratio of O, SiO 2 / (total amount of RO + ZnO) and acid resistance (SR value). The above SR value is determined by the International Standards Organization ISO 8424:
It shows the results obtained by measuring according to the measuring method of 1987 (E), and the SR values in Tables 1 and 2 were 5,5 and 5,
1 and 53 indicate that the time (h) required for the glass sample to undergo 0.1 μm erosion in acetate buffer at pH = 4.6 was h> 10, h = 1 to 10 and h, respectively.
<0.1. Therefore, the smaller the SR value, the higher the acid resistance of the glass and the better the chemical durability.
【００１２】[0012]
【表１】 [Table 1]
【００１３】[0013]
【表２】 [Table 2]
【００１４】表１および表２に示すとおり、本発明にか
かる上記実施例（Ｎｏ．１〜Ｎｏ．１４）のガラスは、
いずれも、ＳＲ値が５または５１を示し、比較例（Ｎ
ｏ．Ａ、Ｎｏ．Ｂ）のガラスと比べ、耐酸性が格段に優
れ、化学的耐久性が優れていることがわかる。また、上
記実施例のガラスは、本発明のガラスとほぼ同等の光学
恒数を有し、ＳｉＯ2成分またはＳｉＯ2およびＢ2Ｏ3の
二成分をガラス形成酸化物とし、Ｎｂ2Ｏ5および／また
はＴａ2Ｏ5成分を含有している従来のガラスと比べ、１
２００℃での粘度（η）が一般に約１０0.5〜１０0.7ｐ
ｏｉｓｅ低く、溶融性が優れているため、脱泡清澄を極
めて容易に行うことができ、泡、脈理等のない均質なも
のが得られた。As shown in Tables 1 and 2, the glasses of the above Examples (No. 1 to No. 14) according to the present invention were:
In each case, the SR value was 5 or 51, and the comparative example (N
o. A, No. It can be seen that the acid resistance is remarkably excellent and the chemical durability is excellent compared with the glass of B). Further, the glass of the above example has an optical constant substantially equal to that of the glass of the present invention, and uses a SiO 2 component or two components of SiO 2 and B 2 O 3 as a glass-forming oxide, and Nb 2 O 5 and And / or compared to conventional glass containing a Ta 2 O 5 component.
The viscosity (η) at 200 ° C. is generally about 10 0.5 to 100.7 p
Oise was low and the meltability was excellent, so that defoaming and fining could be performed very easily, and a homogeneous product without bubbles, striae, etc. was obtained.
【００１５】また、本発明によるガラスは、酸化物、炭
酸塩および硝酸塩等の通常の光学ガラス用原料を秤量混
合し、白金坩堝等を用いて、約１０００℃〜１２５０℃
で約３〜４時間、溶融、清燈、攪拌した後、予熱した型
に鋳込み、徐冷することにより容易に製造することがで
きる。The glass according to the present invention is prepared by weighing and mixing ordinary optical glass raw materials such as oxides, carbonates and nitrates, and using a platinum crucible or the like to obtain a temperature of about 1000 ° C. to 1250 ° C.
After about 3 to 4 hours of melting, lighting, and stirring, it can be easily manufactured by casting into a preheated mold and gradually cooling.
【００１６】[0016]
【発明の効果】以上述べたとおり、本発明の光学ガラス
は、特定組成範囲のＳｉＯ2−Ｂ2Ｏ3−Ｌａ2Ｏ3−Ｔｉ
Ｏ2−ＺｒＯ2−ＺｎＯ−ＢａＯ系のガラスであり、屈折
率（ｎｄ）１．６７〜１．７５、アッベ数（νｄ）４２
〜５０の範囲の光学恒数を有し、化学的耐久性が優れて
いる。また、本発明の光学ガラスは、低粘性で溶融性が
優れているため、泡、脈理等のない均質なものを一層容
易に製造することができる。さらに、本発明の光学ガラ
スは、Ｎｂ2Ｏ5、Ｔａ2Ｏ5といった原料価格が高い成分
や、環境対策のための処理に高いコストを要するＰｂＯ
およびＡｓ2Ｏ3成分を含有していないので、コストの点
でも有利である。As described above, the optical glass of the present invention has a specific composition range of SiO 2 —B 2 O 3 —La 2 O 3 —Ti
O 2 —ZrO 2 —ZnO—BaO based glass having a refractive index (nd) of 1.67 to 1.75 and an Abbe number (νd) of 42
It has an optical constant in the range of ~ 50 and has excellent chemical durability. Further, since the optical glass of the present invention has low viscosity and excellent meltability, a homogeneous glass free of bubbles, striae and the like can be produced more easily. Further, the optical glass of the present invention can be made of a component having a high raw material price such as Nb 2 O 5 or Ta 2 O 5, or a PbO which requires a high cost for processing for environmental measures.
Since it does not contain any As 2 O 3 component, it is advantageous in terms of cost.
Claims (1)
％、Ｂ2Ｏ3 １１．０〜２０．０％、ただし、ＳｉＯ2
＋Ｂ2Ｏ3 ３３．５ 〜４５．０％、かつ、ＳｉＯ2の
含有量＞Ｂ2Ｏ3の含有量、Ａｌ2Ｏ3 ０〜２．０％、Ｌ
ａ2Ｏ3 １２．０〜１９．０％、ＴｉＯ2 １．０〜
７．０％、ＺｒＯ2 １．０〜７．０％、ＺｎＯ ６．
０〜１５．０ ％、ＢａＯ ２６．０〜３８．０％、Ｍ
ｇＯ＋ＣａＯ＋ＳｒＯ ０〜１０．０％、ただし、ＲＯ
（ＲＯはＭｇＯ、ＣａＯ、ＳｒＯおよびＢａＯ）の合計
量 ２６．０〜３８．０％、かつ、ＲＯの合計量＋Ｚｎ
Ｏ≦４４．０％、かつ、ＳｉＯ2／（ＲＯの合計量＋Ｚ
ｎＯ）＞０．４５０（重量比）、Ｌｉ2Ｏ＋Ｎａ2Ｏ＋Ｋ
2Ｏ ０〜３．０％およびＳｂ2Ｏ3 ０〜１．０％の組
成からなり、屈折率（ｎｄ）が１．６７〜１．７５、ア
ッベ数（νｄ）が４２〜５０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. The method according to claim 1, wherein the weight percentage of SiO 2 is 17.0 to 30.0%.
%, B 2 O 3 11.0~20.0% , however, SiO 2
+ B 2 O 3 33.5 ~45.0% , and the content of SiO 2> content of B 2 O 3, Al 2 O 3 0~2.0%, L
a 2 O 3 12.0~19.0%, TiO 2 1.0~
7.0%, ZrO 2 1.0~7.0%, ZnO 6.
0-15.0%, BaO 26.0-38.0%, M
gO + CaO + SrO 0 to 10.0%, provided that RO
(RO is MgO, CaO, SrO and BaO) Total amount of 26.0 to 38.0%, and total amount of RO + Zn
O ≦ 44.0%, and SiO 2 / (total amount of RO + Z
nO)> 0.450 (weight ratio), Li 2 O + Na 2 O + K
2 O consists from 0 to 3.0% and Sb 2 O 3 0 to 1.0% of the composition, the refractive index (nd) of 1.67 to 1.75, an Abbe's number ([nu] d) is in the range of 42-50 An optical glass having an optical constant.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16044697A JPH1143344A (en) | 1997-06-03 | 1997-06-03 | Optical glass |
| CN 98108717 CN1202033C (en) | 1997-06-03 | 1998-06-01 | Optical glass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16044697A JPH1143344A (en) | 1997-06-03 | 1997-06-03 | Optical glass |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1143344A true JPH1143344A (en) | 1999-02-16 |
Family
ID=15715116
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16044697A Pending JPH1143344A (en) | 1997-06-03 | 1997-06-03 | Optical glass |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH1143344A (en) |
| CN (1) | CN1202033C (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2793240A1 (en) * | 1999-05-06 | 2000-11-10 | Schott Glas | OPTICAL LENSES WITHOUT LEAD |
| JP2006036595A (en) * | 2004-07-28 | 2006-02-09 | Ohara Inc | Optical glass |
| JP2009269771A (en) * | 2008-04-30 | 2009-11-19 | Ohara Inc | Optical glass, optical element and optical apparatus |
| JP2014196238A (en) * | 2013-03-20 | 2014-10-16 | ショット・アーゲー | Highly refractive thin glass |
| JP2015027927A (en) * | 2013-04-25 | 2015-02-12 | 日本電気硝子株式会社 | High refractive index glass |
| JP2018172261A (en) * | 2016-06-29 | 2018-11-08 | 株式会社オハラ | Optical glass, preform and optical element |
| JPWO2017175552A1 (en) * | 2016-04-04 | 2019-02-14 | 株式会社オハラ | Optical glass, preform material and optical element |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1331792C (en) * | 2003-08-06 | 2007-08-15 | Hoya株式会社 | Process for producing glass molded lens |
| JP4739721B2 (en) * | 2003-11-17 | 2011-08-03 | 株式会社オハラ | Optical glass |
| CN1950306B (en) * | 2004-03-10 | 2010-08-11 | 株式会社小原 | Optical glass |
| CN101238074B (en) * | 2005-06-06 | 2010-12-08 | 株式会社小原 | Process for producing optical glass |
| CN102153279B (en) * | 2010-02-12 | 2013-11-06 | 肖特玻璃科技(苏州)有限公司 | Optical glass for precision molding |
| CN101863617B (en) * | 2010-05-31 | 2013-07-10 | 成都光明光电股份有限公司 | Optical glass and optical element |
| CN102674686B (en) * | 2012-04-23 | 2014-07-16 | 湖北新华光信息材料有限公司 | Optical glass |
| CN102674691B (en) * | 2012-05-08 | 2015-01-07 | 湖北新华光信息材料有限公司 | Optical glass |
| WO2014175418A1 (en) * | 2013-04-25 | 2014-10-30 | 日本電気硝子株式会社 | High refractive index glass |
| CN103922582B (en) * | 2014-05-06 | 2016-08-24 | 湖北新华光信息材料有限公司 | Optical glass and optical element |
| CN104386911A (en) * | 2014-11-11 | 2015-03-04 | 湖北新华光信息材料有限公司 | Optical glass |
| CN108341593B (en) * | 2017-12-08 | 2021-08-24 | 成都光明光电股份有限公司 | Optical glass |
| CN115180824B (en) * | 2022-07-05 | 2024-01-16 | 河北光兴半导体技术有限公司 | Fireproof glass composition, fireproof glass and preparation method thereof |
-
1997
- 1997-06-03 JP JP16044697A patent/JPH1143344A/en active Pending
-
1998
- 1998-06-01 CN CN 98108717 patent/CN1202033C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2793240A1 (en) * | 1999-05-06 | 2000-11-10 | Schott Glas | OPTICAL LENSES WITHOUT LEAD |
| JP2006036595A (en) * | 2004-07-28 | 2006-02-09 | Ohara Inc | Optical glass |
| JP2009269771A (en) * | 2008-04-30 | 2009-11-19 | Ohara Inc | Optical glass, optical element and optical apparatus |
| JP2014196238A (en) * | 2013-03-20 | 2014-10-16 | ショット・アーゲー | Highly refractive thin glass |
| JP2015027927A (en) * | 2013-04-25 | 2015-02-12 | 日本電気硝子株式会社 | High refractive index glass |
| JPWO2017175552A1 (en) * | 2016-04-04 | 2019-02-14 | 株式会社オハラ | Optical glass, preform material and optical element |
| EP3677559A1 (en) * | 2016-04-04 | 2020-07-08 | Ohara Inc. | Optical glass, preform material and optical element |
| JP2018172261A (en) * | 2016-06-29 | 2018-11-08 | 株式会社オハラ | Optical glass, preform and optical element |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1202033C (en) | 2005-05-18 |
| CN1201018A (en) | 1998-12-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH1143344A (en) | Optical glass | |
| KR100938704B1 (en) | Optical glass containing bisumuth oxide | |
| JP2668049B2 (en) | Optical glass | |
| JPH10265238A (en) | Optical glass having negative anomalous dispensability | |
| JPS60221338A (en) | Optical glass | |
| JPS5950048A (en) | Optical glass | |
| JPH0144651B2 (en) | ||
| JP2006327926A (en) | Optical glass | |
| JPH06107425A (en) | Optical glass | |
| JPH06305769A (en) | Optical glass | |
| JP3113591B2 (en) | High refractive index optical glass | |
| JPH0517176A (en) | Optical glass | |
| JP2872899B2 (en) | Optical glass | |
| JPS58217451A (en) | Niobium oxide-containing formable fluorophosphate glass | |
| JP2795334B2 (en) | Optical glass | |
| JPH05262533A (en) | Optical glass | |
| JPH08119666A (en) | Optical glass | |
| JP2001072432A (en) | Optical glass | |
| JPH10167753A (en) | Lead-free crown glass | |
| JPH0920530A (en) | Composition for optical glass | |
| JPH0472779B2 (en) | ||
| JP4219012B2 (en) | Optical glass | |
| JP4044213B2 (en) | Optical glass | |
| JP4024907B2 (en) | Optical glass | |
| EP1354859A1 (en) | Optical glass |