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.)
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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
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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)
- 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 |
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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 |
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---|---|---|---|---|
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 |
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