DE3201344A1 - High-refractive-index optical glasses having refractive indexes of from 1.79-1.82, Abbe numbers of >/= 32 and densities of </= 4.0 - Google Patents

High-refractive-index optical glasses having refractive indexes of from 1.79-1.82, Abbe numbers of >/= 32 and densities of </= 4.0

Info

Publication number
DE3201344A1
DE3201344A1 DE19823201344 DE3201344A DE3201344A1 DE 3201344 A1 DE3201344 A1 DE 3201344A1 DE 19823201344 DE19823201344 DE 19823201344 DE 3201344 A DE3201344 A DE 3201344A DE 3201344 A1 DE3201344 A1 DE 3201344A1
Authority
DE
Germany
Prior art keywords
refractive
cao
sio2
sro
pbo
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
Application number
DE19823201344
Other languages
German (de)
Other versions
DE3201344C2 (en
Inventor
Volkmar 6500 Mainz Geiler
Georg Dipl.-Ing. Dr. Gliemeroth
Karl Dr. 6204 Taunusstein Mennemann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schott AG
Original Assignee
Schott Glaswerke AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Schott Glaswerke AG filed Critical Schott Glaswerke AG
Priority to DE19823201344 priority Critical patent/DE3201344C2/en
Priority to JP539583A priority patent/JPS58125637A/en
Publication of DE3201344A1 publication Critical patent/DE3201344A1/en
Application granted granted Critical
Publication of DE3201344C2 publication Critical patent/DE3201344C2/en
Expired legal-status Critical Current

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
    • 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
    • C03C3/066—Glass compositions containing silica with less than 40% silica by weight containing boron containing zinc
    • 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
    • C03C3/04—Glass compositions containing silica
    • C03C3/062—Glass compositions containing silica with less than 40% silica by weight
    • C03C3/07—Glass compositions containing silica with less than 40% silica by weight containing lead
    • C03C3/072—Glass compositions containing silica with less than 40% silica by weight containing lead containing 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
    • C03C3/07—Glass compositions containing silica with less than 40% silica by weight containing lead
    • C03C3/072—Glass compositions containing silica with less than 40% silica by weight containing lead containing boron
    • C03C3/074—Glass compositions containing silica with less than 40% silica by weight containing lead containing boron containing zinc

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)
  • Eyeglasses (AREA)

Abstract

The high-refractive-index optical glasses have refractive indexes of from 1.79-1.82, Abbe numbers of >/= 32 and densities of </= 4.0 and are suitable for reading areas and distance areas of spectacles. They have the following composition in % by weight: SiO2 7.5-13.5; B2O3 13-19; Al2O3 0-4; Li2O 0-3; Na2O 0-4; K2O 0-4; CaO 4-18; MgO 0-6; SrO 0-14; BaO 0-14; PbO 0-15; ZnO 0-7; La2O3 13-30; Y2O3 0-6; Gd2O3 0-6; ZrO2 3-8; TiO2 5-13; Nb2O5 5-12; WO3 0-6; Ta2O5 0-6.

Description

Beschreibungdescription

Es ist bereits eine Reihe von hochbrechenden leichten Brillengläsern mit nd = 1.70 bekannt, z.B. aus der DE-PS 2 259 183. Für starke Fehlsichtigkeiten bedingen aber auch diese Gläser noch relativ große Mittendicken (für Plusgläser) bzw. Randdicken (für Minusgläser). Das Ziel der vorliegenden Erfindung ist es, ein noch höher brechendes leichtes Fernteilglas mit einem Brechungsindex > 1.79 zu ermöglichen, wobei gleichzeitig ein möglichst hoher Abbewert angestrebt wird; gleichzeitig sollen diese Gläser als Nahteile zu den leichten hochbrechenden Gläsern gemäß DE-OS 30 26 605 und DE-OS 31 21 824 zu verwenden sein.It is already a line of high refractive light weight eyeglass lenses with nd = 1.70 known, e.g. from DE-PS 2 259 183. For severe ametropia However, these glasses also require relatively large center thicknesses (for plus glasses) or edge thickness (for minus glasses). The aim of the present invention is to provide a even higher refractive light binoculars with a refractive index> 1.79 enable, while at the same time striving for the highest possible depreciation; simultaneously these glasses are intended as close-up parts to the light high-index glasses according to DE-OS 30 26 605 and DE-OS 31 21 824 to be used.

Brillengläser mit geringer Dichte und Brechwerten von 1.80 werden z.B. beschrieben in DE-AS 28 24 891 und DE-AS 28 24 982.Lenses with a low density and a refractive index of 1.80 are used e.g. described in DE-AS 28 24 891 and DE-AS 28 24 982.

Die in DE-AS 28 24 982 beschriebenen Gläser haben den Nachteil einer sehr geringen Abbezahl von 29 - 31; doch leider benötigen gerade die stark Fehlsichtigen Gläser mit hoher Abbezahl, da die störenden Farbsäume mit höheren Dioptriewerten zunehmen: diese Farbsäume können nur durch höhere Abbezahlen gemindert werden. Diese Aufgabe erfüllen die erfindungsgemäßen Gläser.The glasses described in DE-AS 28 24 982 have the disadvantage of a very low Abbe number from 29 - 31; but unfortunately those with severe ametropia need it Glasses with a high Abbe number, because the annoying color fringes with higher diopter values increase: these color fringes can only be reduced by paying higher amounts. These The glasses according to the invention fulfill the task.

Die in DE-AS 28 24 891 beschriebenen Gläser erfüllen nicht die zu stellenden Anforderungen hinsichtlich Kristallisationsstabilität, da sie sehr hohe TiO2-Anteile haben; diese hohen TiO2-Anteile haben zudem einen nachteiligen Effekt auf die Lichtdurchlässigkeit; weiterhin sind diese Gläser wegen ihres ungünstigen Viskositätsverlaufs nicht geeignet als Nahteile für Gläser, wie sie in DE-OS 30 26 605 und DE-OS 31 21 824 beschrieben sind.The glasses described in DE-AS 28 24 891 do not meet the requirements imposing requirements in terms of crystallization stability, since they are very high Have TiO2 components; these high TiO2 proportions also have a disadvantageous effect on the light transmission; furthermore, these glasses are unfavorable because of their Viscosity curve is not suitable as near parts for glasses, as described in DE-OS 30 26 605 and DE-OS 31 21 824 are described.

Die erfindungsgemäße Aufgabe - Brillenfernteilglas und -nahteilglas mit einem Brechungsindex 1.79 - 1.82 bei gleichzeitig geringer Dichte ( # 4.0 g/cm³) und möglichst hoher Abbezahl ( # 32) - wird gelöst durch Gläser des Systems SiO2 - B203 - CaO - La203 - ZrO2 - TiO2 - Nb205 -Alkalioxid mit folgender Zusammensetzung (in Gewichtsprozent): SiO2 7.5 - 13.5 B203 13 - 19 Al2O3 0 - 4 SiO2 + B2O3 + Al2O3 = 24 - 30 Li2O 0 - 3 Na20 0 - 4 K20 0 - 4 Li2O + Na2O + K2O = 2 - 6 CaO 4 - 18 MgO 0 - 6 SrO 0 - 14 BaO 0 - 14 PbO ° - 15 ZnO 0 - 7 CaO + MgO + SrO + BaO +PbO + ZnO = 9 - 26 La2O3 13 - 30 Y2O3 0 - 6 Gd2O3 0 - 6 La2O3 + Y203 + Gd203 = 17 - 31 ZrO2 3 - 8 Ti02 5 - 13 Nb 5 - 12 WO3 0 - 6 TiO2 + Nb2O5 + WO3 = 15 - 22 Ta2O5 0 - 6.The object according to the invention - binoculars and telescopic lenses with a refractive index 1.79 - 1.82 with a low density (# 4.0 g / cm³) and as high as possible Abbezahl (# 32) - is solved through glasses of the system SiO2 - B203 - CaO - La203 - ZrO2 - TiO2 - Nb205 -Alkalioxid with the following Composition (in percent by weight): SiO2 7.5 - 13.5 B203 13 - 19 Al2O3 0 - 4 SiO2 + B2O3 + Al2O3 = 24 - 30 Li2O 0 - 3 Na20 0 - 4 K20 0 - 4 Li2O + Na2O + K2O = 2 - 6 CaO 4 - 18 MgO 0 - 6 SrO 0 - 14 BaO 0 - 14 PbO ° - 15 ZnO 0 - 7 CaO + MgO + SrO + BaO + PbO + ZnO = 9 - 26 La2O3 13 - 30 Y2O3 0 - 6 Gd2O3 0 - 6 La2O3 + Y203 + Gd203 = 17 - 31 ZrO2 3 - 8 Ti02 5 - 13 Nb 5 - 12 WO3 0 - 6 TiO2 + Nb2O5 + WO3 = 15-22 Ta2O5 0-6.

Der Anteil der Glasbildner SiO2 + B203 + 24 - 30 Gew.-%; Alkalioxid in Anteilen von 2-6 Gew.-% ist notwendig, um ein leichtes Aufschmelzen des Gemenges zu gewährleisten und auch, um einenAusdehungskoeffizienten 20 300Von 80-98.10 @ sicherzustellen, der notwendig ist, damit das Glas als Nahteilglas verwendet werden kann.The proportion of glass formers SiO2 + B203 + 24 - 30% by weight; Alkali oxide in proportions of 2-6% by weight is necessary to allow the mixture to melt easily to ensure and also to have an expansion coefficient of 20 300 from 80-98.10 @ ensure that it is necessary so that the glass can be used as a near-field lens can.

CaO in Anteilen von 4 - 18 Gew.-% hebt den Brechwert beachtlich und sorgt für eine geringe Dichte. Die Summe der zweiwertigen Oxide (MgO, CaO, SrO, ZnO, PbO) beträgt 9 - 26 Gew.-%.CaO in proportions of 4-18% by weight increases the refractive index considerably and ensures a low density. The sum of the divalent oxides (MgO, CaO, SrO, ZnO, PbO) is 9-26% by weight.

Ohne einen Seltenerdzusatz (La203 + Y203 + Gd2O3) von 17-31 Gew.-t ist der geforderte hohe Brechwert nicht zu erreichen. Zur Brechwerterhöhung, wobei gleichzeitig die Abbezahl nicht erniedrigt wird, dient auch ZrO2 in Anteilen von 3 - 8 Gew.-%. Als sehr starke brechwerterhöhende Komponenten -wobei sie die Dichte des Glases nur relativ wenig erhöhen -werden TiO2, Nb205 und WO3 in den angegebenen Mengen benutzt.Without a rare earth addition (La203 + Y203 + Gd2O3) of 17-31 wt. T the required high refractive index cannot be achieved. To increase the refractive index, whereby at the same time the Abbe number is not lowered, ZrO2 is also used in proportions of 3 - 8% by weight. As very strong components that increase the refractive index - whereby they increase the density of the glass increase only relatively little - TiO2, Nb205 and WO3 in the specified Quantities used.

Hierbei ist insbesondere von Bedeutung, daß der TiO2-Anteil 13 Gew.-% nicht übersteigen soll, da die Kirstallisationsanfälligkeit stark zunimmt.It is particularly important that the TiO2 content is 13% by weight should not exceed, since the susceptibility to crystallization increases sharply.

In der nachfolgenden Tabelle sind beispielhafte Zusammensetzungen gemäß der Erfindung zusammengestellt.The following table shows exemplary compositions compiled according to the invention.

Gläser gemäß dieser Erfindung werden folgendermaßen hergestellt: Die Komponenten - Oxide, Carbonate, Nitrate - werden entsprechend der Vorschrift abgewogen; es wird ein Läutermittel zugesetzt, und das Glasgemenge wird gut gemischt.Glasses according to this invention are made as follows: The Components - oxides, carbonates, nitrates - are weighed according to the regulation; a refining agent is added and the glass batch is mixed well.

Zwischen 12500 und 13000 C wird das Gemenge im Pt-Tiegel oder einer keramischen Wanne aufgeschmolzen, geläutert, gut mittels Rührer homogenisiert und bei 950 - 10000C auslaufen gelassen, bzw. direkt gepreßt zu Brillenglasrohlingen (Nahteilen bzw. Fernteilen).Between 12500 and 13000 C the mixture is in a Pt crucible or in a ceramic tub melted, refined, well homogenized with a stirrer and Leaked out at 950 - 10000C, or pressed directly to form spectacle lens blanks (Near parts or far parts).

SiO2 11.50 8.20 10.30 12.25 12.35 11.40 11.65 10.20 B2O3 16.15 19.30 15.00 16.60 16.35 16.35 17.35 16.20 Li2O 1.60 1.65 1.35 1.65 1.30 - 1.25 1.30 Na2O 2.00 2.05 1.20 0.90 1.20 - 0.65 1.90 K2O 2.05 2.10 1.80 0.95 1.30 2.25 1.00 2.05 CaO 9.95 9.95 16.60 10.05 4.85 6.75 9.40 9.80 ZnO 3.55 3.60 - 3.60 - - 1.70 -La2O3 25.40 25.25 14.90 25.80 24.20 28.25 17.55 22.50 Y2O3 3.30 3.40 3.40 3.30 - - 3.20 3.30 ZrO2 7.00 7.00 7.70 7.10 6.65 4.95 6.75 4.00 TiO2 9.35 9.20 10.45 9.48 12.50 5.60 7.55 8.70 Nb2O5 8.15 8.30 10.90 8.25 5.75 10.65 7.80 7.00 MgO 4.80 SrO 13,55 Bao 13.80 PbO 14.15 Al2O3 3.00 WO3 1.60 WO3 4.20 Ta2O5 5.85 nd 1.8019 1.7982 1.8060 1.8105 1.8130 1.7980 1.8095 1.7950 vd 34.95 35.30 33.75 35.25 33.30 35.80 33.00 34.60 # 3.80 3.79 3.73 3.81 3.78 3.98 3.99 3.88SiO2 11.50 8.20 10.30 12.25 12.35 11.40 11.65 10.20 B2O3 16.15 19.30 15.00 16.60 16.35 16.35 17.35 16.20 Li2O 1.60 1.65 1.35 1.65 1.30 - 1.25 1.30 Na2O 2.00 2.05 1.20 0.90 1.20 - 0.65 1.90 K2O 2.05 2.10 1.80 0.95 1.30 2.25 1.00 2.05 CaO 9.95 9.95 16.60 10.05 4.85 6.75 9.40 9.80 ZnO 3.55 3.60 - 3.60 - - 1.70 -La2O3 25.40 25.25 14.90 25.80 24.20 28.25 17.55 22.50 Y2O3 3.30 3.40 3.40 3.30 - - 3.20 3.30 ZrO2 7.00 7.00 7.70 7.10 6.65 4.95 6.75 4.00 TiO2 9.35 9.20 10.45 9.48 12.50 5.60 7.55 8.70 Nb2O5 8.15 8.30 10.90 8.25 5.75 10.65 7.80 7.00 MgO 4.80 SrO 13.55 Bao 13.80 PbO 14.15 Al2O3 3.00 WO3 1.60 WO3 4.20 Ta2O5 5.85 nd 1.8019 1.7982 1.8060 1.8105 1.8130 1.7980 1.8095 1.7950 vd 34.95 35.30 33.75 35.25 33.30 35.80 33.00 34.60 # 3.80 3.79 3.73 3.81 3.78 3.98 3.99 3.88

Claims (3)

Hochbrechende optische Gläser mit Brechwerten von 1,79 - 1,82, Abbezahlen > 32 und Dichten < 4,0 Patentansprüche: 1. Hochbrechende optische Gläser mit Brechwerten von 1.79 -1.82 und Abbezahlen > 32 und mit einer Dichte < 4.0 g/cm3, die sowohl für Brillennahteile als auch für Fernteile geeignet sind, gekennzeichnet durch folgende Zusammensetzung (in Gew.-%): 1) SiO2 7.5 - 13.5 B203 13 - 19 A1203 0 - 4 SiO2 + B2O3 + Al2O3 = 24 - 30 Li2O 0 - 3 Na20 0 - 4 K20 0 - 4 Li2 0 + Na2 0 + K20 = 2 - 6 CaO 4 - 18 MgO 0 - 6 SrO 0 - 14 BaO 0 - 14 PbO 0 - 15 ZnO 0 - 7 CaO + MgO + SrO + BaO + PbO + ZnO = 9 - 26 La2O3 13 - 30 Y203 0 - 6 Gd2O3 0 - 6 La203 + Y203 + Gd2O3 = 17 - 31 ZrO2 3 - 8 TiO2 5 - 13 Nb205 5 - 12 WO3 0 - 6 Ti02 + Nb205 + WO3 = 15 - 22 Ta205 0 - 6. High refractive optical glasses with refractive indices of 1.79 - 1.82, Abbezahlen > 32 and densities <4.0 claims: 1. High refractive optical glasses with Refractive indices of 1.79 -1.82 and Abbezahlen> 32 and with a density <4.0 g / cm3, which are suitable for both near-eyeglass parts and distant parts by the following composition (in% by weight): 1) SiO2 7.5 - 13.5 B203 13 - 19 A1203 0 - 4 SiO2 + B2O3 + Al2O3 = 24 - 30 Li2O 0 - 3 Na20 0 - 4 K20 0 - 4 Li2 0 + Na2 0 + K20 = 2 - 6 CaO 4-18 MgO 0-6 SrO 0-14 BaO 0-14 PbO 0 - 15 ZnO 0 - 7 CaO + MgO + SrO + BaO + PbO + ZnO = 9 - 26 La2O3 13 - 30 Y203 0 - 6 Gd2O3 0 - 6 La203 + Y203 + Gd2O3 = 17 - 31 ZrO2 3 - 8 TiO2 5 - 13 Nb205 5 - 12 WO3 0-6 Ti02 + Nb205 + WO3 = 15-22 Ta205 0-6. 2. Gläser nach Anspruch 1, gekennzeichnet durch folgende Zusammensetzung: SiO2 10 - 13 B2O3 14 - 18 SiO2 + B2O3 = 26 - 29 Li2 0 0 - 2 Na2O 0 - 3 K20 0 - 3 Li2O + Na20 + K20 = 2 - 6 CaO 8.5 - 13 MgO 0 - 4 SrO 0 - 8 BaO 0 - 8 PbO 0 - 8 ZnO 0 - 6 CaO + MgO + SrO + BaO + PbO + ZnO = 11 - 18 La2O3 20 - 30 Y2O3 0 - 5 Gd2O3 0 - 5 La2O3 + Y2O3 + Gd2O3 = 25 - 30 ZrO2 4 - 8 TiO2 7 - 11 Nb2O5 7 - 11 WO3 0 - 4 Ti02 + Nb205 + Wo3 = 16 - 20 Ta2O5 0 - 5.2. Glasses according to claim 1, characterized by the following composition: SiO2 10 - 13 B2O3 14 - 18 SiO2 + B2O3 = 26 - 29 Li2 0 0 - 2 Na2O 0 - 3 K20 0 - 3 Li2O + Na20 + K20 = 2-6 CaO 8.5-13 MgO 0-4 SrO 0-8 BaO 0 - 8 PbO 0 - 8 ZnO 0 - 6 CaO + MgO + SrO + BaO + PbO + ZnO = 11 - 18 La2O3 20 - 30 Y2O3 0 - 5 Gd2O3 0 - 5 La2O3 + Y2O3 + Gd2O3 = 25 - 30 ZrO2 4 - 8 TiO2 7 - 11 Nb2O5 7 - 11 WO3 0 - 4 Ti02 + Nb205 + Wo3 = 16 - 20 Ta2O5 0 - 5. 3. Gläser nach Anspruch 1, mit einer Abbezahl > 34 und einer Dichte ( 3.85, gekennzeichnet durch folgende Zusammensetzung: SiO2 11.5 - 13.5 B203 15.0 - 18 SiO2 + B2O3 = 27.5 - 29.5 Li2O 0.5 - 2.0 Na2O 0 - 3 K2O 0 - 3 Li2O + Na2O + K2O = 2 - 6 CaO 9 - 12 ZnO 0 - 4 SrO 0 - 4 BaO 0 - 4 PbO 0 - 4 MgO 0 - 4 CaO + ZnO + SrO + BaO + PbO + MgO = 12 - 15 La2O3 23 - 29 Y2O3 0 - 4 La2O3 + Y203 = 27 - 30 ZrO2 6 - 8 TiO2 8.5 - 11 Nb205 7.0 - 10.5 TiO2 + Nb2O5 = 16.5 - 19.3. Glasses according to claim 1, with an Abbe number> 34 and a density (3.85, characterized by the following composition: SiO2 11.5 - 13.5 B203 15.0 - 18 SiO2 + B2O3 = 27.5 - 29.5 Li2O 0.5 - 2.0 Na2O 0 - 3 K2O 0 - 3 Li2O + Na2O + K2O = 2-6 CaO 9-12 ZnO 0-4 SrO 0-4 BaO 0-4 PbO 0-4 MgO 0 - 4 CaO + ZnO + SrO + BaO + PbO + MgO = 12 - 15 La2O3 23 - 29 Y2O3 0 - 4 La2O3 + Y203 = 27 - 30 ZrO2 6 - 8 TiO2 8.5 - 11 Nb205 7.0 - 10.5 TiO2 + Nb2O5 = 16.5 - 19th
DE19823201344 1982-01-18 1982-01-18 High refractive index optical glasses in the system SiO 2 -B 2 O 3 -Alkalioxid-Erdalkaloxid-La 2 O 3 -ZrO 2 -TiO 5 2-2 -Nb with refractive indices of 1.79 - 1.82, Abbezahlen? 32 and densities &lE; 4.0 Expired DE3201344C2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19823201344 DE3201344C2 (en) 1982-01-18 1982-01-18 High refractive index optical glasses in the system SiO 2 -B 2 O 3 -Alkalioxid-Erdalkaloxid-La 2 O 3 -ZrO 2 -TiO 5 2-2 -Nb with refractive indices of 1.79 - 1.82, Abbezahlen? 32 and densities &lE; 4.0
JP539583A JPS58125637A (en) 1982-01-18 1983-01-18 High-refractive index optical glass having refractive index of 1.79-1.82, abbe number of at least 32 and density of 4.0g/cm3 or less

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19823201344 DE3201344C2 (en) 1982-01-18 1982-01-18 High refractive index optical glasses in the system SiO 2 -B 2 O 3 -Alkalioxid-Erdalkaloxid-La 2 O 3 -ZrO 2 -TiO 5 2-2 -Nb with refractive indices of 1.79 - 1.82, Abbezahlen? 32 and densities &lE; 4.0

Publications (2)

Publication Number Publication Date
DE3201344A1 true DE3201344A1 (en) 1983-07-28
DE3201344C2 DE3201344C2 (en) 1984-02-16

Family

ID=6153303

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19823201344 Expired DE3201344C2 (en) 1982-01-18 1982-01-18 High refractive index optical glasses in the system SiO 2 -B 2 O 3 -Alkalioxid-Erdalkaloxid-La 2 O 3 -ZrO 2 -TiO 5 2-2 -Nb with refractive indices of 1.79 - 1.82, Abbezahlen? 32 and densities &lE; 4.0

Country Status (2)

Country Link
JP (1) JPS58125637A (en)
DE (1) DE3201344C2 (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2549033A1 (en) * 1983-07-14 1985-01-18 Hoya Corp GLASS FOR GLASSES OF GLASSES
DE4222322C1 (en) * 1992-07-08 1993-12-02 Schott Glaswerke Optical glass - with high negative part dispersion in blue spectrum range as well as high refraction index and abbe number
FR2758814A1 (en) * 1997-01-29 1998-07-31 Corning Sa High refractive index glass for ophthalmic application(s)
EP0971861A1 (en) * 1997-01-29 2000-01-19 Corning Incorporated Glasses with very high refractive index
US6121176A (en) * 1997-01-29 2000-09-19 Corning S.A. Glasses with very high refractive index
US6333288B1 (en) 1999-05-06 2001-12-25 Schott Glas Lead-free optical glasses
CN114315131A (en) * 2021-12-31 2022-04-12 海安明光光学玻璃科技有限公司 Optical glass
US11802073B2 (en) 2020-09-10 2023-10-31 Corning Incorporated Silicoborate and borosilicate glasses with high refractive index and low density
US11976004B2 (en) 2020-09-10 2024-05-07 Corning Incorporated Silicoborate and borosilicate glasses having high refractive index and high transmittance to blue light
US11999651B2 (en) 2020-09-10 2024-06-04 Corning Incorporated Silicoborate and borosilicate glasses having high refractive index and low density

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60122745A (en) * 1983-12-07 1985-07-01 Hoya Corp Optical glass
BR8605356A (en) * 1985-11-29 1987-08-04 Corning Glass Works GLASS FOR OPTICAL AND / OR OPHTHALMIC APPLICATIONS
DE19848077C1 (en) * 1998-10-19 2000-01-27 Schott Glas Lead-free optical glass
JP4350016B2 (en) * 2004-09-29 2009-10-21 Ｈｏｙａ株式会社 Optical glass, precision press-molding preform and manufacturing method thereof, and optical element and manufacturing method thereof
JP2009203155A (en) 2008-01-31 2009-09-10 Ohara Inc Optical glass
JP2009208974A (en) * 2008-02-29 2009-09-17 Ohara Inc Optical glass, optical element and optical instrument
JP2009242207A (en) * 2008-03-31 2009-10-22 Ohara Inc Optical glass, optical element and optical device
JP2011037660A (en) * 2009-08-07 2011-02-24 Ohara Inc Optical glass, lens preform and optical element
JP2011246337A (en) * 2010-04-30 2011-12-08 Ohara Inc Optical glass, optical element and method for manufacturing molded glass article
JP6096502B2 (en) * 2011-12-20 2017-03-15 株式会社オハラ Optical glass and optical element
JP6096501B2 (en) * 2011-12-28 2017-03-15 株式会社オハラ Optical glass and optical element
JP6095356B2 (en) * 2011-12-28 2017-03-15 株式会社オハラ Optical glass and optical element
JP6146691B2 (en) * 2012-03-27 2017-06-14 日本電気硝子株式会社 Optical glass
CN109790060A (en) * 2016-10-03 2019-05-21 株式会社小原 Optical glass, prefabricated component and optical element
JP7224099B2 (en) * 2016-10-03 2023-02-17 株式会社オハラ Optical glass, preforms and optical elements
CN109650717B (en) * 2019-02-28 2021-10-26 成都光明光电股份有限公司 Optical glass
JP2023102688A (en) * 2022-01-12 2023-07-25 株式会社住田光学ガラス Optical glass, preform for precision press molding, and optical element
CN118834015A (en) * 2022-08-26 2024-10-25 成都光明光电股份有限公司 Optical glass, optical element and optical instrument

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4888106A (en) * 1972-02-25 1973-11-19
JPS52103412A (en) * 1976-02-26 1977-08-30 Obara Optical Glass Optical glass

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NICHTS-ERMITTELT *

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2549033A1 (en) * 1983-07-14 1985-01-18 Hoya Corp GLASS FOR GLASSES OF GLASSES
DE4222322C1 (en) * 1992-07-08 1993-12-02 Schott Glaswerke Optical glass - with high negative part dispersion in blue spectrum range as well as high refraction index and abbe number
FR2758814A1 (en) * 1997-01-29 1998-07-31 Corning Sa High refractive index glass for ophthalmic application(s)
EP0971861A1 (en) * 1997-01-29 2000-01-19 Corning Incorporated Glasses with very high refractive index
US6121176A (en) * 1997-01-29 2000-09-19 Corning S.A. Glasses with very high refractive index
EP0971861A4 (en) * 1997-01-29 2001-01-24 Corning Sa Glasses with very high refractive index
US6333288B1 (en) 1999-05-06 2001-12-25 Schott Glas Lead-free optical glasses
US11802073B2 (en) 2020-09-10 2023-10-31 Corning Incorporated Silicoborate and borosilicate glasses with high refractive index and low density
US11976004B2 (en) 2020-09-10 2024-05-07 Corning Incorporated Silicoborate and borosilicate glasses having high refractive index and high transmittance to blue light
US11999651B2 (en) 2020-09-10 2024-06-04 Corning Incorporated Silicoborate and borosilicate glasses having high refractive index and low density
CN114315131A (en) * 2021-12-31 2022-04-12 海安明光光学玻璃科技有限公司 Optical glass

Also Published As

Publication number Publication date
JPS6332734B2 (en) 1988-07-01
JPS58125637A (en) 1983-07-26
DE3201344C2 (en) 1984-02-16

Similar Documents

Publication Publication Date Title
DE3201344A1 (en) High-refractive-index optical glasses having refractive indexes of from 1.79-1.82, Abbe numbers of &gt;/= 32 and densities of &lt;/= 4.0
DE3343418C2 (en)
DE3201346C2 (en) Highly refractive optical glasses with refractive indices of 1.84 - 1.87 and Abbe numbers of 30 - 33 in the system SiO 2 -B 2 O 3 -Alkalioxid-Erdalkalioxid / ZnO-PbO-La 2 O 3 ; -ZrO 2 -TiO 2 -Nb 2 O 5
DE3420306C2 (en)
CN101318769B (en) Environment friendly heavy-lanthanide flint optical glass
DE3139212C2 (en) Use of a glass with refractive index nd ≥ 1.58, Abbe number ≥ 45 and density ≤ 2.75 g/cm3 as spectacle lens
US4166746A (en) Optical glass
DE3130715A1 (en) Optical glass of high refractive index and low scattering
DE68920691T2 (en) Phosphate glasses containing zinc.
US3785835A (en) Anomalous dispersion glass
DE3206226A1 (en) Optical and ophthalmic glass having a refractive index of &gt;/=1.56, an Abbe number of &gt;/=40 and a density of &lt;/=2.70 g/cm&lt;3&gt;
US4404290A (en) Glasses of high refractive index, low dispersion, and low density
DE19958522B4 (en) Optical glasses containing zinc
DE2824891A1 (en) LIGHT, HEIGHT-REVERSING EYE-GLASSES
JPS58145640A (en) High refractive index ophthalmic glass
DE4242859A1 (en) Opthalmic and optical glass with high refractive index and low density - comprises compsns. of silica, germanium oxide, boron oxide and other oxide(s)
DE3500578A1 (en) Optical glass having refractive indices of from 1.73 to 1.80 and Abbe numbers &gt;/= 49
DE19820072C1 (en) New lead-free optical lanthanum crown and flint glasses
DE3439162C2 (en)
DE2652747A1 (en) Thorium free optical glass having high refraction and low dispersion - is based on oxides of boron, lanthanum, yttrium and titanium
DE4222322C1 (en) Optical glass - with high negative part dispersion in blue spectrum range as well as high refraction index and abbe number
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
DE4402537A1 (en) Lead-free optical flint glass with good processing properties e.g. for pressing
US4476233A (en) Phosphate optical glass
DE19631581C1 (en) Barium flint glass used in optical applications

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