JPS6350293B2 - - Google Patents
Info
- Publication number
- JPS6350293B2 JPS6350293B2 JP10778180A JP10778180A JPS6350293B2 JP S6350293 B2 JPS6350293 B2 JP S6350293B2 JP 10778180 A JP10778180 A JP 10778180A JP 10778180 A JP10778180 A JP 10778180A JP S6350293 B2 JPS6350293 B2 JP S6350293B2
- Authority
- JP
- Japan
- Prior art keywords
- glass
- refractive index
- against devitrification
- stability against
- exceeds
- 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.)
- Expired
Links
- 229910021193 La 2 O 3 Inorganic materials 0.000 claims description 8
- 239000005304 optical glass Substances 0.000 claims description 7
- 229910005793 GeO 2 Inorganic materials 0.000 claims description 5
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 4
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 4
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 3
- 229910018068 Li 2 O Inorganic materials 0.000 claims description 2
- 239000011521 glass Substances 0.000 description 26
- 238000004031 devitrification Methods 0.000 description 20
- 230000007423 decrease Effects 0.000 description 11
- 239000000203 mixture Substances 0.000 description 9
- 239000000126 substance Substances 0.000 description 8
- 239000006185 dispersion Substances 0.000 description 6
- 229910052793 cadmium Inorganic materials 0.000 description 3
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- ZSLUVFAKFWKJRC-IGMARMGPSA-N 232Th Chemical compound [232Th] ZSLUVFAKFWKJRC-IGMARMGPSA-N 0.000 description 2
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910052776 Thorium Inorganic materials 0.000 description 2
- 238000004040 coloring Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- CXKCTMHTOKXKQT-UHFFFAOYSA-N cadmium oxide Inorganic materials [Cd]=O CXKCTMHTOKXKQT-UHFFFAOYSA-N 0.000 description 1
- CFEAAQFZALKQPA-UHFFFAOYSA-N cadmium(2+);oxygen(2-) Chemical compound [O-2].[Cd+2] CFEAAQFZALKQPA-UHFFFAOYSA-N 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 150000002222 fluorine compounds Chemical class 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- UZLYXNNZYFBAQO-UHFFFAOYSA-N oxygen(2-);ytterbium(3+) Chemical compound [O-2].[O-2].[O-2].[Yb+3].[Yb+3] UZLYXNNZYFBAQO-UHFFFAOYSA-N 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- ZCUFMDLYAMJYST-UHFFFAOYSA-N thorium dioxide Chemical compound O=[Th]=O ZCUFMDLYAMJYST-UHFFFAOYSA-N 0.000 description 1
- 229910003452 thorium oxide Inorganic materials 0.000 description 1
- 229910003454 ytterbium oxide Inorganic materials 0.000 description 1
- 229940075624 ytterbium oxide Drugs 0.000 description 1
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
- C03C3/12—Silica-free oxide glass compositions
- C03C3/23—Silica-free oxide glass compositions containing halogen and at least one oxide, e.g. oxide of boron
-
- 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
-
- 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
- C03C3/12—Silica-free oxide glass compositions
- C03C3/14—Silica-free oxide glass compositions containing boron
- C03C3/15—Silica-free oxide glass compositions 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)
Description
本発明は、高屈折率低分散の光学ガラスに関す
る。
従来、このような高屈折率、低分散の光学ガラ
スには多くの場合、高屈折率低分散性を付与する
成分として酸化トリウムおよび酸化カドミウムが
使用されていたが、トリウムは放射能を有し人体
に有害であり、またカドミウムも人体に有害であ
るため、いずれもガラス成分として用いることは
避けなければならない。トリウムおよびカドミウ
ムに代りガラスに高屈折率、低分散性を付与する
成分として酸化イツテルビウムが知られている。
例えば、特公昭53―25323号公報がある。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、工業的規模で生産するのに適していない。
また、アツベ数も充分大きいとは言い難い。
本発明の目的は、B2O3―La2O3―Yb2O3―Ｆの
４成分系を基礎とする、トリウムおよびカドミウ
ムを含まない、第１図に示す範囲内の屈折率
（md）及びアツベ数（νd）を有する高屈折率低分
散の光学ガラスを提供することにある。
フツ素を導入したB2O3―La2O3―Yb2O3―Ｆの
４成分系ガラスはB2O3―La2O3―Yb2O3の３成分
系ガラスに比べて液相温度が著るしく低下し、失
透に対する安定性が顕著に向上するので、ガラス
が工業的規模で安定して容易に得られるようにな
る。また、フツ素を導入することにより、公知の
組成範囲では得られなかつた大きなアツベ数のガ
ラスを安定かつ容易に得ることができる。例え
ば、屈折率が約1.75のガラスのアツベ数は、前記
公知の組成範囲では53.4以上のものは得られなか
つたのに対し、本発明では54.9のものまで得るこ
とができる。また、屈折率が約1.70のガラスのア
ツベ数は、前記公知組成範囲では55.8以上のもの
は得られなかつたのに対し、本発明では58.8のも
のまで得ることができる。このように、B2O3―
La2O3―Yb2O3―Ｆ系は失透に対し安定でアツベ
数の大きいガラスを作るのに適しているが、さら
に、SiO2，R2O（R2OはLi2O，Na2OおよびK2O
の１種または２種以上の組合せ）、RO（ROは
MgO，CaO，SrO，BaO，ZnOの１種または２
種以上の組合せ）、Y2O3，ZrO2，Ta2O5，
Nb2O5，PbO，WO3，Al2O3，TiO2，GeO2，
Gd2O3等の成分を含有させることにより、より安
定かつ容易にガラスを生産することができる。
本発明に係るガラスの組成範囲を重量パーセン
トで次に示す。
B2O3 20 〜37
La2O3 34 〜60
Yb2O3 1〜32
Ｆ 0.1〜７
SiO2 0 〜３
R2O 0 〜６
（R2OはLi2O，Na2OおよびK2Oのうち１種ま
たは２種以上の組合せ）
RO ０〜18
（ROはMgO，CaO，SrO，BaO，ZnOのうち
１種または２種以上の組合せ）
Y2O3 ０〜23
ZrO2 ０〜11
Ta2O5 ０〜12
Nb2O5 ０〜 ５
PbO ０〜 ６
WO3 ０〜10
Al2O3 ０〜 ４
TiO2 ０〜 ５
GeO2 ０〜16
Gd2O3 ０〜12
B2O3は20パーセント未満では失透に対する安
定性が充分でなく、37パーセントを超えると屈折
率が低下して目的に適さない。La2O3は34パーセ
ント未満では屈折率が低下して目的に適さず、60
パーセントを超えると失透に対する安定性が低下
する。Yb2O3は１パーセント未満および32パーセ
ントを超えると失透に対する安定性が低下する。
Ｆは0.1パーセント未満および７パーセントを超
えると失透に対する安定性が低下する。SiO2は
失透に対する安定性を高め化学的耐久性を高める
が、３パーセントを超えると、溶融の際に溶け残
つて溶融を長引かせ好ましくない。R2Oはガラス
の粘性を低下させてガラスの成形を容易にする
が、合量で６パーセントを超えると失透に対する
安定性が低下する。ROはガラスの失透に対する
安定性を向上させるが、合量で18パーセントを超
えると失透に対する安定性が低下する。Y2O3は
ガラスのアツベ数を大きくし、化学的耐久性を向
上させるが、23パーセントを超えると失透に対す
る安定性が低下する。ZrO2はガラスの屈折率を
高め、また化学的耐久性を高めるが、11パーセン
トを超えると失透に対する安定性が低下する。
Ta2O5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が、12パーセ
ントを超えるとアツベ数が低下して目的に適さな
い。Nb2O5はガラスの屈折率を高め、化学的耐久
性を高めるが、５パーセントを超えると着色が強
くなり実用的でなくなる。PbOはガラスの屈折率
を高めるが、６パーセントを超えると着色が強く
なり実用的でなくなる。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が、10パーセ
ントを超えると、着色が強くなり実用的でなくな
る。Al2O3は化学的耐久性を向上させるが、４パ
ーセントを超えると屈折率が低下して目的に適さ
なくなる。TiO2はガラスの屈折率を高め、化学
的耐久性を高めるが、５パーセントを超えると着
色が強くなり実用的でなくなる。GeO2は失透に
対する安定性を高めるが、16パーセントを超える
と逆に失透に対して不安定となる。Gd2O3はガラ
スの屈折率を高め化学的耐久性を向上させるが、
12パーセントを超えると失透に対して不安定とな
る。
上記組成範囲のうち、次の組成範囲のガラスは
失透に対する安定性により優れている。
B2O3 24 〜37
La2O3 35 〜50
Yb2O3 5 〜15
Ｆ 0.1〜 4.1
CaO 0 〜 6
SrO 0 〜 2
BaO 0 〜 8
ZnO 0 〜 8
Y2O3 0 〜11
ZrO2 0 〜 7
Ta2O5 0 〜12
Nb2O5 0 〜 5
GeO2 0 〜16
Gd2O3 0 〜12
さらに、次の組成範囲のガラスは失透に対する
安定性により優れている。
B2O3 26 〜37
La2O3 35 〜50
Yb2O3 9 〜15
Ｆ 0.1〜 2.5
SrO 0 〜 2
BaO 0 〜 3
ZnO 0 〜 6
Y2O3 0 〜 7
ZrO2 0 〜 7
本発明に係る光学ガラスは、各成分の原料とし
て酸化物、炭酸塩、硝酸塩等またはフツ化物を使
用し、所望の割合に秤取し、充分混合して調合原
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、溶融清澄後撹拌し、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。
本発明による光学ガラスの実施例の組成（重量
パーセント）、屈折率（nd）およびアツベ数
（νd）を表１に示す。
The present invention relates to optical glasses with high refractive index and low dispersion. Conventionally, in many cases, thorium oxide and cadmium oxide were used as components for imparting high refractive index and low dispersion to optical glasses with high refractive index and low dispersion, but thorium has radioactivity. Since cadmium is harmful to the human body, and cadmium is also harmful to the human body, the use of either as a glass component must be avoided. Ytterbium oxide is known as a component that imparts high refractive index and low dispersion to glass in place of thorium and cadmium.
For example, there is Japanese Patent Publication No. 53-25323. but,
This glass cannot be said to have sufficient stability against devitrification and is not suitable for production on an industrial scale.
Furthermore, it is difficult to say that the Atsube number is sufficiently large. The object of the present invention is to obtain a refractive index ( md ) and Abbe's number (νd), and provides a high refractive index, low dispersion optical glass. The four-component glass of B 2 O 3 - La 2 O 3 - Yb 2 O 3 - F into which fluorine is introduced is more liquid than the three-component glass of B 2 O 3 - La 2 O 3 - Yb 2 O 3 . The phase temperature is significantly lowered and the stability against devitrification is significantly improved, so that glasses can be stably and easily obtained on an industrial scale. In addition, by introducing fluorine, it is possible to stably and easily obtain a glass having a large Aggregation number, which could not be obtained using a known composition range. For example, the Abbé number of glass with a refractive index of about 1.75 could not be obtained in the known composition range of 53.4 or higher, but in the present invention, it can be obtained as high as 54.9. Furthermore, while glass having a refractive index of about 1.70 could not have an Abbé number of 55.8 or higher in the known composition range, the present invention can obtain an Abbe number of up to 58.8. In this way, B 2 O 3 -
The La 2 O 3 --Yb 2 O 3 --F system is stable against devitrification and is suitable for making glasses with a large Abe number, but it is also suitable for producing glasses with a large Abe number . Na2O and K2O
(one or a combination of two or more), RO (RO is
One or two of MgO, CaO, SrO, BaO, ZnO
(combination of more than one species), Y 2 O 3 , ZrO 2 , Ta 2 O 5 ,
Nb 2 O 5 , PbO, WO 3 , Al 2 O 3 , TiO 2 , GeO 2 ,
By containing components such as Gd 2 O 3 , glass can be produced more stably and easily. The composition ranges of the glasses according to the invention are shown below in weight percentages. B 2 O 3 20 ~ 37 La 2 O 3 34 ~ 60 Yb 2 O 3 1 ~ 32 F 0.1 ~ 7 SiO 2 0 ~ 3 R 2 O 0 ~ 6 (R 2 O is Li 2 O, Na 2 O, and K 2 O (one type or combination of two or more types) RO 0 to 18 (RO is one type or combination of two or more types of MgO, CaO, SrO, BaO, ZnO) Y 2 O 3 0 to 23 ZrO 2 0 ~11 Ta 2 O 5 0 ~ 12 Nb 2 O 5 0 ~ 5 PbO 0 ~ 6 WO 3 0 ~ 10 Al 2 O 3 0 ~ 4 TiO 2 0 ~ 5 GeO 2 0 ~ 16 Gd 2 O 3 0 ~ 12 B When 2 O 3 is less than 20%, stability against devitrification is insufficient, and when it exceeds 37%, the refractive index decreases and is not suitable for the purpose. If La 2 O 3 is less than 34%, the refractive index decreases and it is not suitable for the purpose, and 60
If it exceeds 1%, the stability against devitrification decreases. When Yb 2 O 3 is less than 1% and more than 32%, stability against devitrification decreases.
When F is less than 0.1% and more than 7%, stability against devitrification decreases. SiO 2 increases stability against devitrification and improves chemical durability, but if it exceeds 3%, it remains undissolved during melting and prolongs melting, which is undesirable. R 2 O reduces the viscosity of the glass and makes it easier to mold the glass, but if the total amount exceeds 6%, the stability against devitrification decreases. RO improves the stability of glass against devitrification, but when the total amount exceeds 18%, the stability against devitrification decreases. Y 2 O 3 increases the Abbes number of the glass and improves its chemical durability, but when it exceeds 23%, the stability against devitrification decreases. ZrO 2 increases the refractive index of the glass and also increases its chemical durability, but above 11 percent it decreases its stability against devitrification.
Ta 2 O 5 increases the refractive index of the glass, increases its stability against devitrification, and improves its chemical durability, but if it exceeds 12 percent, the Atsbe number decreases and it is not suitable for the purpose. Nb 2 O 5 increases the refractive index of the glass and improves its chemical durability, but if it exceeds 5%, the coloring becomes strong and becomes impractical. PbO increases the refractive index of glass, but if it exceeds 6%, the color becomes strong and becomes impractical. WO 3 increases the refractive index of the glass and improves its stability against devitrification, but if it exceeds 10%, the coloring becomes strong and becomes impractical. Al 2 O 3 improves chemical durability, but above 4% the refractive index decreases making it unsuitable for the purpose. TiO 2 increases the refractive index of the glass and improves its chemical durability, but if it exceeds 5%, it becomes strongly colored and becomes impractical. GeO 2 increases stability against devitrification, but when it exceeds 16%, it becomes unstable against devitrification. Gd 2 O 3 increases the refractive index of glass and improves its chemical durability, but
If it exceeds 12%, it becomes unstable against devitrification. Among the above composition ranges, glasses having the following composition ranges have better stability against devitrification. B 2 O 3 24 ~ 37 La 2 O 3 35 ~ 50 Yb 2 O 3 5 ~ 15 F 0.1 ~ 4.1 CaO 0 ~ 6 SrO 0 ~ 2 BaO 0 ~ 8 ZnO 0 ~ 8 Y 2 O 3 0 ~ 11 ZrO 2 0 to 7 Ta 2 O 5 0 to 12 Nb 2 O 5 0 to 5 GeO 2 0 to 16 Gd 2 O 3 0 to 12 Furthermore, glasses in the following composition ranges have better stability against devitrification. B 2 O 3 26 ~ 37 La 2 O 3 35 ~ 50 Yb 2 O 3 9 ~ 15 F 0.1 ~ 2.5 SrO 0 ~ 2 BaO 0 ~ 3 ZnO 0 ~ 6 Y 2 O 3 0 ~ 7 ZrO 2 0 ~ 7 The optical glass according to the invention uses oxides, carbonates, nitrates, etc. or fluorides as raw materials for each component, weighs them out in the desired proportions, thoroughly mixes them to form a blended raw material, and heats the mixture at 1200 to 1400°C. It can be produced by pouring it into a platinum crucible in an electric furnace heated to , melting and clarifying it, stirring it, homogenizing it, and then casting it into an iron mold. Table 1 shows the composition (weight percent), refractive index (nd), and Abbe number (vd) of the optical glass according to the present invention.
【表】【table】
【表】
本発明によれば、第１図に点Ａ（1.81，59），Ｂ
（1.81，48.3），Ｃ（1.69，58.6）及びＤ（1.69，59）
の４点で囲まれた範囲内（線上を含まず）のnd，
νdを有する高屈折率低分散で、液相温度の低い
（900℃以下）の光学ガラスを工業的規模において
安定して製造することができる。[Table] According to the present invention, points A (1.81, 59) and B in FIG.
(1.81, 48.3), C (1.69, 58.6) and D (1.69, 59)
nd within the range surrounded by the four points (not including the line),
Optical glasses with a high refractive index, low dispersion, and a low liquidus temperature (900°C or less) can be stably produced on an industrial scale.
第１図は、光学恒数図（nd―νd図）である。 Figure 1 is an optical constant diagram (nd-vd diagram).
Claims (1)
たは２種以上の組合せ） RO ０〜18 （ROはMgO，CaO，SrO，BaOおよびZnOの
うち１種または２種以上の組合せ） Y2O3 ０〜23 ZrO2 ０〜11 Ta2O5 ０〜12 Nb2O5 ０〜 ５ PbO ０〜 ６ WO3 ０〜10 Al2O3 ０〜 ４ TiO2 ０〜 ５ GeO2 ０〜16 Gd2O3 ０〜12 の組成を有し、かつ第１図に示す点Ａ（1.81，
59），Ｂ（1.81，48.3），Ｃ（1.69，58.6），Ｄ（1.69
，
59）の４点で囲まれた範囲内の屈折率及びアツベ
数を有する光学ガラス。[Claims] 1 B 2 O 3 20-37 La 2 O 3 34-60 Yb 2 O 3 1-32 F 0.1-7 SiO 2 0-3 R 2 O 0-6 (R 2 O (RO is one or a combination of two or more of Li 2 O, Na 2 O, and K 2 O) RO 0 to 18 (RO is one or a combination of two or more of MgO, CaO, SrO, BaO, and ZnO) Y 2 O 3 0-23 ZrO 2 0-11 Ta 2 O 5 0-12 Nb 2 O 5 0-5 PbO 0-6 WO 3 0-10 Al 2 O 3 0-4 TiO 2 0-5 GeO 2 0 ~16 Gd 2 O 3 0~12 and point A (1.81,
59), B (1.81, 48.3), C (1.69, 58.6), D (1.69
，
59) Optical glass having a refractive index and Atsube number within the range surrounded by the four points.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10778180A JPS5734044A (en) | 1980-08-07 | 1980-08-07 | Optical glass |
| DE19813130715 DE3130715A1 (en) | 1980-08-07 | 1981-08-03 | Optical glass of high refractive index and low scattering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10778180A JPS5734044A (en) | 1980-08-07 | 1980-08-07 | Optical glass |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5734044A JPS5734044A (en) | 1982-02-24 |
| JPS6350293B2 true JPS6350293B2 (en) | 1988-10-07 |
Family
ID=14467851
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10778180A Granted JPS5734044A (en) | 1980-08-07 | 1980-08-07 | Optical glass |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPS5734044A (en) |
| DE (1) | DE3130715A1 (en) |
Families Citing this family (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2540486A1 (en) * | 1983-02-09 | 1984-08-10 | Corning Glass Works | MOLDABLE FLUORO-BORATE OPTIC LENSES |
| DE3307497C2 (en) * | 1983-03-03 | 1985-09-12 | Schott Glaswerke, 6500 Mainz | Optical glass in the system Si0? 2? - B? 2? 0? 3? - La 2 0 3 - Zr0? 2? - alkali oxide - alkaline earth oxide - Zn0 - F with refractive index? 1.70, Payoff? 48, with good devitrification stability and good chemical resistance |
| JP3100725B2 (en) * | 1992-01-21 | 2000-10-23 | 株式会社住田光学ガラス | Optical glass for precision press molding |
| DE10122263C2 (en) | 2001-05-08 | 2003-04-03 | Schott Glas | Optical glasses and their use |
| JP3943348B2 (en) * | 2001-06-06 | 2007-07-11 | 株式会社オハラ | Optical glass |
| FR2849650B1 (en) * | 2003-01-06 | 2006-12-08 | Gerard Lang | BORATE GLASS AS A FONDANT FOR PRODUCING PEARLS INTENDED FOR X-FLUORESCENCE ANALYSIS, AND PROCESS FOR PREPARING SAID GLASS |
| GB2418222A (en) | 2004-09-21 | 2006-03-22 | Dublin Inst Of Technology | Light pipe |
| JP4522392B2 (en) * | 2006-06-16 | 2010-08-11 | Ｈｏｙａ株式会社 | Optical glass and optical product using the same |
| WO2009004710A1 (en) * | 2007-07-02 | 2009-01-08 | Ohara Inc. | Glass composition |
| TWI541213B (en) * | 2010-07-26 | 2016-07-11 | Ohara Kk | Optical glass, preform and optical element |
| JP2012126586A (en) * | 2010-12-13 | 2012-07-05 | Ohara Inc | Optical glass, preform, and optical element |
| JP6096409B2 (en) * | 2010-10-29 | 2017-03-15 | 株式会社オハラ | Optical glass, preform and optical element |
| JP6076594B2 (en) * | 2010-12-13 | 2017-02-08 | 株式会社オハラ | Optical glass, preform and optical element |
| JP5705175B2 (en) * | 2011-08-05 | 2015-04-22 | 株式会社オハラ | Optical glass, preform and optical element |
| JP5800766B2 (en) * | 2011-10-28 | 2015-10-28 | 株式会社オハラ | Optical glass, preform and optical element |
| JP5731358B2 (en) * | 2011-09-01 | 2015-06-10 | 株式会社オハラ | Optical glass, preform and optical element |
| JP6096501B2 (en) * | 2011-12-28 | 2017-03-15 | 株式会社オハラ | Optical glass and optical element |
| CN103274595A (en) * | 2013-05-10 | 2013-09-04 | 南通晶鑫光学玻璃有限公司 | Environment-friendly lanthanide optical glass TZlaF4 with high refractive index and low dispersion |
| JP6049591B2 (en) * | 2013-07-31 | 2016-12-21 | 株式会社オハラ | Optical glass, preform material and optical element |
| JP6462244B2 (en) * | 2014-01-07 | 2019-01-30 | 日本電気硝子株式会社 | Optical glass |
| JP6462245B2 (en) * | 2014-01-07 | 2019-01-30 | 日本電気硝子株式会社 | Optical glass |
| TWI731991B (en) * | 2016-06-29 | 2021-07-01 | 日商小原股份有限公司 | Optical glass, preforms and optical components |
| JP2017171578A (en) * | 2017-06-23 | 2017-09-28 | 株式会社オハラ | Optical glass and optical element |
-
1980
- 1980-08-07 JP JP10778180A patent/JPS5734044A/en active Granted
-
1981
- 1981-08-03 DE DE19813130715 patent/DE3130715A1/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| DE3130715A1 (en) | 1982-02-25 |
| JPS5734044A (en) | 1982-02-24 |
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