DE3500578A1 - Optical glass having refractive indices of from 1.73 to 1.80 and Abbe numbers >/= 49 - Google Patents
Optical glass having refractive indices of from 1.73 to 1.80 and Abbe numbers >/= 49Info
- Publication number
- DE3500578A1 DE3500578A1 DE19853500578 DE3500578A DE3500578A1 DE 3500578 A1 DE3500578 A1 DE 3500578A1 DE 19853500578 DE19853500578 DE 19853500578 DE 3500578 A DE3500578 A DE 3500578A DE 3500578 A1 DE3500578 A1 DE 3500578A1
- Authority
- DE
- Germany
- Prior art keywords
- weight
- sio2
- refractive indices
- optical glass
- good
- 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.)
- Granted
Links
- 239000005304 optical glass Substances 0.000 title claims abstract description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 19
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims abstract description 18
- CJNBYAVZURUTKZ-UHFFFAOYSA-N hafnium(IV) oxide Inorganic materials O=[Hf]=O CJNBYAVZURUTKZ-UHFFFAOYSA-N 0.000 claims abstract description 10
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 10
- 229910052681 coesite Inorganic materials 0.000 claims abstract description 9
- 229910052906 cristobalite Inorganic materials 0.000 claims abstract description 9
- CMIHHWBVHJVIGI-UHFFFAOYSA-N gadolinium(III) oxide Inorganic materials [O-2].[O-2].[O-2].[Gd+3].[Gd+3] CMIHHWBVHJVIGI-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 9
- 229910052682 stishovite Inorganic materials 0.000 claims abstract description 9
- 229910052905 tridymite Inorganic materials 0.000 claims abstract description 9
- 229910011255 B2O3 Inorganic materials 0.000 claims abstract description 6
- MRELNEQAGSRDBK-UHFFFAOYSA-N lanthanum oxide Inorganic materials [O-2].[O-2].[O-2].[La+3].[La+3] MRELNEQAGSRDBK-UHFFFAOYSA-N 0.000 claims abstract description 6
- RUDFQVOCFDJEEF-UHFFFAOYSA-N yttrium(III) oxide Inorganic materials [O-2].[O-2].[O-2].[Y+3].[Y+3] RUDFQVOCFDJEEF-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000011521 glass Substances 0.000 claims description 20
- PBCFLUZVCVVTBY-UHFFFAOYSA-N tantalum pentoxide Inorganic materials O=[Ta](=O)O[Ta](=O)=O PBCFLUZVCVVTBY-UHFFFAOYSA-N 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 6
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 4
- ZKATWMILCYLAPD-UHFFFAOYSA-N niobium pentoxide Inorganic materials O=[Nb](=O)O[Nb](=O)=O ZKATWMILCYLAPD-UHFFFAOYSA-N 0.000 claims description 4
- KOPBYBDAPCDYFK-UHFFFAOYSA-N Cs2O Inorganic materials [O-2].[Cs+].[Cs+] KOPBYBDAPCDYFK-UHFFFAOYSA-N 0.000 claims description 3
- -1 oxygen ions Chemical class 0.000 claims 2
- FUJCRWPEOMXPAD-UHFFFAOYSA-N Li2O Inorganic materials [Li+].[Li+].[O-2] FUJCRWPEOMXPAD-UHFFFAOYSA-N 0.000 claims 1
- 229910000272 alkali metal oxide Inorganic materials 0.000 claims 1
- XUCJHNOBJLKZNU-UHFFFAOYSA-M dilithium;hydroxide Chemical compound [Li+].[Li+].[OH-] XUCJHNOBJLKZNU-UHFFFAOYSA-M 0.000 claims 1
- 229910052731 fluorine Inorganic materials 0.000 claims 1
- 239000011737 fluorine Substances 0.000 claims 1
- 229910052760 oxygen Inorganic materials 0.000 claims 1
- 239000001301 oxygen Substances 0.000 claims 1
- KTUFCUMIWABKDW-UHFFFAOYSA-N oxo(oxolanthaniooxy)lanthanum Chemical compound O=[La]O[La]=O KTUFCUMIWABKDW-UHFFFAOYSA-N 0.000 abstract description 4
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 238000004031 devitrification Methods 0.000 abstract description 3
- 239000003513 alkali Substances 0.000 abstract description 2
- GOLCXWYRSKYTSP-UHFFFAOYSA-N arsenic trioxide Inorganic materials O1[As]2O[As]1O2 GOLCXWYRSKYTSP-UHFFFAOYSA-N 0.000 description 6
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 230000003287 optical effect Effects 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
- ZNOKGRXACCSDPY-UHFFFAOYSA-N tungsten(VI) oxide Inorganic materials O=[W](=O)=O ZNOKGRXACCSDPY-UHFFFAOYSA-N 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- AKUNKIJLSDQFLS-UHFFFAOYSA-M dicesium;hydroxide Chemical compound [OH-].[Cs+].[Cs+] AKUNKIJLSDQFLS-UHFFFAOYSA-M 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 150000002222 fluorine compounds Chemical class 0.000 description 1
- 239000006066 glass batch Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000012629 purifying agent Substances 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 238000010998 test method Methods 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
- C03C3/04—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
Beschreibungdescription
Die Erfindung betrifft ein neues optisches Glas mit Brechwerten 1,73 bis 1,80 und Abbezahlen x 49.The invention relates to a new optical glass with a refractive index of 1.73 up to 1.80 and paying off x 49.
Der Stand der Technik ist in der DE-OS 31 02 690 ausführlich dargestellt. In einigen der dort erwähnten Patentanmeldungen wird der Versuch beschrieben, die extreme optische Lage in Systemen mit viel Yb203 - z.B. bis 40 Gew.-(J 78 025 383) oder bis 65 Gew.-% (J 81 78 447) oder bis 32 Gew.-% (DE-OS 31 30 715) zu erreichen. Dabei zeigen diese Gläser verminderte Transmission im Bereich 850 bis 1000 nm Wellenlänge und sind wegen des hohen Yb203-Preises sehr teuer. In der DE-OS 2237259 werden die gewünschten optischen Lagen nur mit bis zu 53 Gew.-% Cd0 und bis zu 30 Gew.-% Ta205 bei 20 bis 30 Gew.-% Anteilen an Mo-Oxiden erreicht.The prior art is shown in detail in DE-OS 31 02 690. In some of the patent applications mentioned there, the attempt is described which extreme optical position in systems with a lot of Yb203 - e.g. up to 40 wt .- (J 78 025 383) or up to 65% by weight (J 81 78 447) or up to 32% by weight (DE-OS 31 30 715). These glasses show reduced transmission in the range from 850 to 1000 nm wavelength and are very expensive because of the high Yb203 price. In DE-OS 2237259 the desired optical layers only with up to 53% by weight of Cd0 and up to 30% by weight of Ta205 reached at 20 to 30 wt .-% proportions of Mo oxides.
CdO-haltige Gläser entsprechen nicht mehr dem heutigen Umweltschutzbedürfnis und Ta205 führt aufgrund seines hohen Preises in größeren Anteilen zu sehr teuren Gläsern. Außerdem lassen sich in diesen Systemen bei Brechzahlen > 1,75 nur noch Abbezahlen < 50 erschmelzen.Glasses containing CdO no longer meet today's environmental protection requirements and Ta205 leads to very expensive ones in larger proportions due to its high price Glasses. In addition, in these systems, refractive indices> 1.75 can only be used Pay off <50 melt.
Die Gläser gemäß J 77 155 615 und US 41 11 707 benötigen über 17 Gew.-% Gd203, wobei die Stabilität der Gläser sehr gering ist. Die Gläser gemäß DE-OS 31 02 690 und DE-OS 31 30 066 sind gekennzeichnet durch einen hohen Gehalt an Nb205 - bis zu 11 Gew.-% (DE-OS 31 02 690) - und durch Fehlen von Gd203 (DE-OS 31 30 066).The glasses according to J 77 155 615 and US 41 11 707 require more than 17% by weight Gd203, whereby the stability of the glasses is very low. The glasses according to DE-OS 31 02 690 and DE-OS 31 30 066 are characterized by a high content of Nb205 - Up to 11 wt .-% (DE-OS 31 02 690) - and the lack of Gd203 (DE-OS 31 30 066).
Die Gläser gemäß DE-OS 33 07 497 sind gekennzeichnet durch Fehlen von Hf02, Ta205 und W03.The glasses according to DE-OS 33 07 497 are characterized by lack by Hf02, Ta205 and W03.
Ziel der Erfindung ist es, einen Zusammensetzungsbereich für ein optisches Glas mit den Brechwerten 1,73 bis 1,80 und einer Abbezahl >, 49 zu finden, wobei die Entglasungsstabilität des Glases ausreichend für die Anforderungen der optischen Glasindustrie sein soll. Dieses Ziel wird mit einem Glas gemäß den Patentansprüchen erreicht.The aim of the invention is to provide a composition range for an optical Glass with a refractive index of 1.73 to 1.80 and an Abbe number> .49 can be found, whereby the devitrification stability of the glass is sufficient for the requirements of the optical Glass industry is supposed to be. This aim is achieved with a glass according to the claims achieved.
Die erfindungsgemäßen Gläser erfüllen nicht nur die Forderung nach guter Entglasungsstabilität, sondern auch die nach guter Transmission, besonders im gesamten Bereich von 370 bis 1400 nm Wellenlänge, nach guter Alkaliresistenz, Unempfindlichkeit gegen Fleckenbildung und guter Klimawechselresistenz (entsprechende Prüfverfahren sind im Schott-Katalog "Optisches Glas", Nr. 311 d, 1980 angegeben).The glasses according to the invention not only meet the requirement for good devitrification stability, but also that of good transmission, especially in the entire range from 370 to 1400 nm wavelength, after good alkali resistance, Insensitivity to staining and good climate change resistance (corresponding Test methods are given in the Schott catalog "Optical Glass", No. 311d, 1980).
Die gute Kristallisationsstabilität wird durch bestimmte Anteile an SiO2, B203, ZrO2, Y203. Gd203 und durch ausgewogene Zusätze von HfO2 - bis zu 1,5 Gew.-%, Ta205 - bis zu 3 Gew.-%, WO3 - bis zu 1 Gew.-% erreicht. Die drei Oxide HfO2, Ta2O5 und W03 wirken in den wohlausgewogenen geringen Mengen besonders kristallisationsstabilisierend.The good crystallization stability is due to certain proportions of SiO2, B203, ZrO2, Y203. Gd203 and through balanced additions of HfO2 - up to 1.5 % By weight, Ta205 - up to 3% by weight, WO3 - up to 1% by weight achieved. The three oxides HfO2, Ta2O5 and W03 have a particularly stabilizing effect on crystallization in the well-balanced small amounts.
Tabelle 1 enthält 11 Zusammensetzungsbeispiele gemäß der vorliegenden Erfindung.Table 1 contains 11 composition examples according to the present invention Invention.
Die erfindungsgemäßen Gläser werden folgendermaßen hergestellt: Die Rohstoffe (Oxide, Carbonate, ev. Fluoride und Nitrate) werden abgewogen. Ein Läutermittel, wie As203 in Anteilen von 0,1 bis 0,5 Gew.-%, wird zugegeben und gut gemischt. Das Glasgemenge wird bei ca. 1280 - 1320 OC im Platin- oder Keramiktiegel eingeschmolzen, danach geläutert und mittels eines Rührers gut homogenisiert. Bei einer Gußtemperatur von 1080 -1180 OC wird das Glas zu den gewünschten Abmessungen verarbeitet.The glasses according to the invention are produced as follows: The Raw materials (oxides, carbonates, possibly fluorides and nitrates) are weighed. A purifying agent like As203 in proportions of 0.1-0.5% by weight, add and mix well. That Glass batch is melted down in a platinum or ceramic crucible at approx. 1280 - 1320 OC, then refined and well homogenized using a stirrer. At a casting temperature from 1080 -1180 OC the glass is processed to the desired dimensions.
Schmelzbeispiel für 100 kg berechnetes Glas Oxid Gew.-% Rohstoff Einwaage (kg) SiO2 0,80 Quarzmehl 0,80 B203 30,40 H3B03 53,90 ZnO 2,00 ZnO 2,01 La2O3 43,00 La2O3 43,01 Y203 9,20 y203 9,29 ZrO2 5,50 ZrO2 5,51 Gd203 5,30 Gd2O3 5,31 Ta205 3,00 Ta205 3,00 WO3 0,70 W03 0,70 123,53 As203 0,10 As2O3 0,10 Läutermittel 123,63 Gemenge Die Eigenschaften dieses Glases sind in Tabelle 1, Beispiel 6 angegeben.Melting example for 100 kg calculated glass oxide wt .-% raw material weight (kg) SiO2 0.80 Quartz powder 0.80 B203 30.40 H3B03 53.90 ZnO 2.00 ZnO 2.01 La2O3 43.00 La2O3 43.01 Y203 9.20 y203 9.29 ZrO2 5.50 ZrO2 5.51 Gd203 5.30 Gd2O3 5.31 Ta205 3.00 Ta205 3.00 WO3 0.70 W03 0.70 123.53 As203 0.10 As2O3 0.10 refining agent 123.63 Mixture The properties of this glass are given in Table 1, Example 6.
Tabelle 1 1 2 3 4 5 6 7 8 9 10 11 SiO2 2,50 2,50 2,50 2,50 1,80 0,80 4,50 1,20 1,70 2,00 3,50 B2O3 33,00 30,40 32,00 32,00 28,80 30,40 33,20 28,80 30,00 28,70 32,00 ZnO 2,40 2,00 2,40 2,40 1,50 2,00 3,60 1,50 3,60 0,90 2,60 La2O3 42,00 41,00 41,00 41,00 42,00 43,00 43,00 43,10 45,00 41,00 49,00 Y2O3 8,20 9,20 8,20 8,20 10,10 9,20 6,00 10,10 8,00 10,10 6,00 ZrO2 4,50 6,50 4,50 4,50 7,50 5,50 1,00 7,50 6,00 7,50 2,00 Gd2O3 5,00 6,00 5,00 5,00 6,90 5,30 3,00 7,00 4,00 7,70 3,00 HfO2 -- -- -- -- -- -- 1,50 1,50 1,50 As2O3 0,20 0,20 0,20 0,20 0,20 0,10 0,20 0,10 0,20 0,20 0,10 Ta2O5 0,70 0,70 0,70 0,70 0,70 3,00 -- 0,70 -- 0,80 WO3 0,70 TiO2 2,0 Cs2O 1,50 1,50 1,50 1,50 0,50 -- -- -- -- 1,10 0,40 PbO -- -- 2,0 Nb2O5 F- -- 0,85 nd 1,7475 1,7637 1,7505 1,7607 1,7816 1,7826 1,7306 1,7957 1,7752 1,7802 1,7442 d 51,77 50,48 50,34 49,00 49,50 49,20 54,00 49,30 50,13 49,60 53,50Table 1 1 2 3 4 5 6 7 8 9 10 11 SiO2 2.50 2.50 2.50 2.50 1.80 0.80 4.50 1.20 1.70 2.00 3.50 B2O3 33.00 30.40 32.00 32.00 28.80 30.40 33.20 28.80 30.00 28.70 32.00 ZnO 2.40 2.00 2.40 2.40 1.50 2.00 3.60 1.50 3.60 0.90 2.60 La2O3 42.00 41.00 41.00 41.00 42.00 43.00 43.00 43.10 45.00 41.00 49.00 Y2O3 8.20 9.20 8.20 8.20 10.10 9.20 6.00 10.10 8.00 10.10 6.00 ZrO2 4.50 6.50 4.50 4.50 7.50 5.50 1.00 7.50 6.00 7.50 2.00 Gd2O3 5.00 6.00 5.00 5.00 6.90 5.30 3.00 7.00 4.00 7.70 3.00 HfO2 - - - - - - 1.50 1.50 1.50 As2O3 0.20 0.20 0.20 0.20 0.20 0.10 0.20 0.10 0.20 0.20 0.10 Ta2O5 0.70 0.70 0.70 0.70 0.70 3.00 - 0.70 - 0.80 WO3 0.70 TiO2 2.0 Cs2O 1.50 1.50 1.50 1.50 0.50 - - - - 1.10 0.40 PbO - - 2.0 Nb2O5 F- - 0.85 nd 1.7475 1.7637 1.7505 1.7607 1.7816 1.7826 1.7306 1.7957 1.7752 1.7802 1.7442 d 51.77 50.48 50.34 49.00 49.50 49.20 54.00 49.30 50.13 49.60 53.50
Claims (1)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19853500578 DE3500578C2 (en) | 1985-01-10 | 1985-01-10 | Optical glass with refractive indices from 1.73 to 1.80 and Abbe numbers ≥ 49 |
| JP337086A JPS61219738A (en) | 1985-01-10 | 1986-01-10 | Optical glass having refractive index of 1.73-1.80 and abbe's number of more than 49 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19853500578 DE3500578C2 (en) | 1985-01-10 | 1985-01-10 | Optical glass with refractive indices from 1.73 to 1.80 and Abbe numbers ≥ 49 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE3500578A1 true DE3500578A1 (en) | 1986-07-10 |
| DE3500578C2 DE3500578C2 (en) | 1987-02-12 |
Family
ID=6259532
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19853500578 Expired DE3500578C2 (en) | 1985-01-10 | 1985-01-10 | Optical glass with refractive indices from 1.73 to 1.80 and Abbe numbers ≥ 49 |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPS61219738A (en) |
| DE (1) | DE3500578C2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002062712A1 (en) * | 2001-02-05 | 2002-08-15 | Koninklijke Philips Electronics N.V. | Multicomponent glass, glass fiber, twister and taper |
| US7297647B2 (en) * | 2004-02-26 | 2007-11-20 | Schott Ag | Lead- and arsenic-free optical lanthanum flint glasses |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10122263C2 (en) * | 2001-05-08 | 2003-04-03 | Schott Glas | Optical glasses and their use |
| JP2009242210A (en) * | 2008-03-31 | 2009-10-22 | Ohara Inc | Optical glass, optical element and optical device |
| JP5249697B2 (en) * | 2008-09-26 | 2013-07-31 | アルフレッド ユニバーシティ | Optical glass |
| JP6096409B2 (en) * | 2010-10-29 | 2017-03-15 | 株式会社オハラ | Optical glass, preform and optical element |
| JP6049591B2 (en) * | 2013-07-31 | 2016-12-21 | 株式会社オハラ | Optical glass, preform material and optical element |
| JP6188553B2 (en) * | 2013-07-31 | 2017-08-30 | 株式会社オハラ | Optical glass, preform material and optical element |
| WO2015083616A1 (en) * | 2013-12-03 | 2015-06-11 | 旭硝子株式会社 | Optical glass, preform for press-molding, and optical element |
| JP6472657B2 (en) * | 2014-12-26 | 2019-02-20 | Hoya株式会社 | Glass, glass material for press molding, optical element blank, and optical element |
| JP2017171578A (en) * | 2017-06-23 | 2017-09-28 | 株式会社オハラ | Optical glass and optical element |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3307497A1 (en) * | 1983-03-03 | 1984-09-06 | Schott Glaswerke, 6500 Mainz | OPTICAL GLASS WITH BREAKING VALUES> = 1.70, PAYBACK <= 48, WITH GOOD DE-GLASS STABILITY AND GOOD CHEMICAL RESISTANCE |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS606297B2 (en) * | 1980-05-30 | 1985-02-16 | 株式会社小原光学硝子製造所 | optical glass |
-
1985
- 1985-01-10 DE DE19853500578 patent/DE3500578C2/en not_active Expired
-
1986
- 1986-01-10 JP JP337086A patent/JPS61219738A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3307497A1 (en) * | 1983-03-03 | 1984-09-06 | Schott Glaswerke, 6500 Mainz | OPTICAL GLASS WITH BREAKING VALUES> = 1.70, PAYBACK <= 48, WITH GOOD DE-GLASS STABILITY AND GOOD CHEMICAL RESISTANCE |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002062712A1 (en) * | 2001-02-05 | 2002-08-15 | Koninklijke Philips Electronics N.V. | Multicomponent glass, glass fiber, twister and taper |
| US6690869B2 (en) | 2001-02-05 | 2004-02-10 | Koninklijke Philips Electronics N.V. | Multicomponent glass, glass fiber, twister and taper |
| US7297647B2 (en) * | 2004-02-26 | 2007-11-20 | Schott Ag | Lead- and arsenic-free optical lanthanum flint glasses |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61219738A (en) | 1986-09-30 |
| DE3500578C2 (en) | 1987-02-12 |
| JPH0472779B2 (en) | 1992-11-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE3343418C2 (en) | ||
| DE3605668C2 (en) | ||
| DE3307497C2 (en) | 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 | |
| DE3216451C2 (en) | Lightweight optical glass with a refractive index? 1.70, an Abbe number? 22 and a density &lE; 3.5 g / cm? 3? | |
| US4128432A (en) | Optical glass | |
| US4771020A (en) | Optical glass | |
| DE3130715A1 (en) | Optical glass of high refractive index and low scattering | |
| DE3201346A1 (en) | High-refractive-index optical glasses having refractive indexes of from 1.84 - 1.87 and Abbe numbers of from 30 - 33 | |
| DE3490637T1 (en) | Lightweight optical glass | |
| DE3431215A1 (en) | Optical glass of high refractive index and low dispersion | |
| DE1496524B2 (en) | Lead-free, devitrification stable optical glass with a refractive index of at least 1.65 and its use, especially in fiber optics | |
| DE2942038A1 (en) | THORIUM-FREE OPTICAL GLASS WITH HIGH BREAKING INDEX AND LOW SPATTERING | |
| DE3500578A1 (en) | Optical glass having refractive indices of from 1.73 to 1.80 and Abbe numbers >/= 49 | |
| DE3501100C2 (en) | ||
| DE4132258C1 (en) | Optical glass - contg. oxide(s) of silicon, germanium, boron, aluminium, zinc, magnesium, sodium, potassium, lithium, strontium, barium, calcium, gadolinium, tantalum, lead, etc. | |
| DE4032567C2 (en) | ||
| DE2756161A1 (en) | High-refractive, low-dispersive optical glass - comprising a boron, lanthanum, gadolinium, tungsten, zirconium and/or tantalum oxide system | |
| DD208141A5 (en) | OPTICAL GLASS WITH BRECH VALUES OF 1.60-1.69 | |
| DE19820072C1 (en) | New lead-free optical lanthanum crown and flint glasses | |
| DE3331106A1 (en) | OPTICAL GLASS WITH A RECHARGEABLE VALUE 1.60 AND A NUMBER 58, WITH HIGH CHEMICAL STABILITY AND RESISTANCE TO SEPARATION AND CRYSTALIZATION | |
| DE2652747A1 (en) | Thorium free optical glass having high refraction and low dispersion - is based on oxides of boron, lanthanum, yttrium and titanium | |
| DE2653581A1 (en) | Optical glass based on oxides of silicon, boron and lanthanum - having high index of refraction and low dispersion | |
| DE3130066A1 (en) | CdO-, ThO2- and Ta2O5-free or low Ta2O5 optical glass having a refractive index of 1.76 - 1.81 and an Abbe number of 51-44 | |
| DE1259027B (en) | Glass, especially as a material for optical elements | |
| DE4402537A1 (en) | Lead-free optical flint glass with good processing properties e.g. for pressing |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OP8 | Request for examination as to paragraph 44 patent law | ||
| D2 | Grant after examination | ||
| 8364 | No opposition during term of opposition | ||
| 8339 | Ceased/non-payment of the annual fee |