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DE3201346A1 - High-refractive-index optical glasses having refractive indexes of from 1.84 - 1.87 and Abbe numbers of from 30 - 33 - Google Patents

High-refractive-index optical glasses having refractive indexes of from 1.84 - 1.87 and Abbe numbers of from 30 - 33

Info

Publication number
DE3201346A1
DE3201346A1 DE19823201346 DE3201346A DE3201346A1 DE 3201346 A1 DE3201346 A1 DE 3201346A1 DE 19823201346 DE19823201346 DE 19823201346 DE 3201346 A DE3201346 A DE 3201346A DE 3201346 A1 DE3201346 A1 DE 3201346A1
Authority
DE
Germany
Prior art keywords
refractive
sio2
glasses
tio2
zro2
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
DE19823201346
Other languages
German (de)
Other versions
DE3201346C2 (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
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Filing date
Publication date
Application filed by Schott Glaswerke AG filed Critical Schott Glaswerke AG
Priority to DE19823201346 priority Critical patent/DE3201346C2/en
Priority to JP539483A priority patent/JPS58125636A/en
Publication of DE3201346A1 publication Critical patent/DE3201346A1/en
Application granted granted Critical
Publication of DE3201346C2 publication Critical patent/DE3201346C2/en
Expired legal-status Critical Current

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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
    • C03C3/07—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
    • 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

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

A novel optical glass having refractive indexes of from 1.84-1.87 and Abbe numbers of from 30-33, which can preferably be used as reading area fusion glass for spectacles, comprises (in % by weight): SiO2 7-11, B2O3 11-15, Al2O3 0-3; alkali metal oxide 1.5-5, alkaline earth metal oxide and zinc oxide 6-20; La2O3 20-34, Y2O3 0-7, Gd2O3 0-7, ZrO2 4-8, TiO2 4-12, PbO 0-20, Nb2O5 5-12, WO3 0-4, Ta2O5 0-6.

Description

Beschreibungdescription

Die Erfindung betrifft hochbrechende optische Gläser mit Brechungsinzes von 1.84 - 1.87 und Abbezahlen > 30 mit hoher Entglasungsfestigkeit. Dank einer geeignet verlaufenden Viskositätskurve im Bereich von 106 - 1015 poise und geeigneter AusdehnungskoeffizientenoC20300 von 80 - 95 .107 können sie bevorzugt als Brillennahteilverschmelzgläser für hochbrechende Fernteilgläser gemäß DE-OS 30 26 605 und -OS 31 21 824 Verwendung finden.The invention relates to high-index optical glasses with refractive indices from 1.84 - 1.87 and Abbezahlen> 30 with high devitrification resistance. Thanks one suitable running viscosity curve in the range of 106-1015 poise and more suitable Coefficients of expansion oC20300 of 80 - 95.107 can preferably be used as close-up glasses for glasses for high refractive binoculars according to DE-OS 30 26 605 and OS 31 21 824 use Find.

Höchstbrechende Brillennahteilverschmelzgläser sind bis heute nicht bekannt.Highly refractive close-up glasses are still not known.

Die Gläser gemäß dieser Erfindung gehören dem System B 203 -SiO2 - Alkalioxid - (Erdalkali + +-ZnO) - ZrO2 - TiO2 - Nb 205 -La203 - an. Hierbei ist insbesondere von Bedeutung, daß der B203-Anteil den des SiO2 übersteigt; das B203/SiO2-Verhältnis beträgt ca. 1,3 - 1,8; nur innerhalb dieses Verhältnisses werden für Nahteilverschmelzungen genügend kristallisationsstabile Gläser erschmolsen. Die Summe an SiO2 und B203 beträgt 20-24 Gew.-%; übersteigt der Anteil 24 Gew.-%,werden die geforderten hohen Brechwerte nicht erreicht; unterhalb 20 Gew.-% wird der Anteil an Glasbildner zu gering, so daß keine genügend kristallisationsstabilen Gläser erhalten werden. Die Summe an Erdalkalioxiden (MgO + Ca0 + SrO + BaO) und ZnO beträgt erfindungsgemäß 6 - 20 Gew.-%.The glasses according to this invention belong to the system B 203 -SiO2 - Alkali oxide - (alkaline earth + + -ZnO) - ZrO2 - TiO2 - Nb 205 -La203 - an. Here is It is particularly important that the B203 content exceeds that of the SiO2; the B203 / SiO2 ratio is approx. 1.3 - 1.8; only within this ratio are for near-part mergers Sufficient crystallization-stable glasses melted. The sum of SiO2 and B203 is 20-24% by weight; If the proportion exceeds 24 wt .-%, the required high Refractive index not achieved; below 20% by weight the proportion of glass former increases low, so that glasses which are sufficiently stable to crystallization cannot be obtained. the The sum of alkaline earth oxides (MgO + CaO + SrO + BaO) and ZnO is according to the invention 6-20% by weight.

Einerseits erhöhen die Erdalkalioxide den Brechwert, andererseits leisten sie gute Adaptionsdienste für die Verschmelzung, da die entsprechenden Fernteilgläser ebenfalls deutliche Anteile an diesen Komponenten aufweisen. Alkalioxide in der Größenordnung von 1.5 - 5 Gew.-% erniedrigen die notwendige Schmelztemperatur; des weiteren dienen sie zur Einstellung des gewünschten Ausdehnungskoeffizienten (wichtig für eine spannungsfreie Verschmelzung). ZrO2 erhöht den Brechwert beachtlich und sorgt für eine höhere Säureresistenz; bei mehr als 8 Gew.-% ZrO2 geht allerdings die hohe Entglasungsfestigkeit verloren. TiO2 (4-12 Gew.-%) erhöht den Brechwert beachtlich, wobei allerding auch der Abbewert erniedrigt wird; Nb205 erhöht ebenfalls sehr deutlich den Brechwert, übt aber auch Ersatzglasbildnerfunktion aus, was sich sehr günstig auf die Entglasungsstabilität auswirkt. Der SE-Oxid-Anteil (La203 + Y203 + Gd203) beträgt 23 - 38 Gew.-%.On the one hand, the alkaline earth oxides increase the refractive index, on the other hand they provide good adaptation services for the fusion, as the corresponding binoculars also have significant proportions of these components. Alkali oxides in the An order of magnitude of 1.5-5% by weight lower the necessary melting temperature; of They also serve to set the desired expansion coefficient (important for a tension-free fusion). ZrO2 increases the refractive index considerably and ensures a higher acid resistance; however, if more than 8% by weight of ZrO2 is used, this is possible lost its high resistance to devitrification. TiO2 (4-12% by weight) increases the refractive index considerable, although the depreciation is also lowered; Nb205 also increases the refractive index is very clear, but it also has a substitute glass-forming function, which has a very beneficial effect on the devitrification stability. The rare earth oxide part (La203 + Y203 + Gd203) is 23 - 38% by weight.

Anspruch 2 nennt die am meisten bevorzugten Zusammensetzungsbereiche: PbO als "Kann"-Bestandteil des Anspruchs 1 wird als "Muß"-Bestandteil in Anspruch 2 aufgenommen wegen seiner erkanntermaßen günstigen Auswirkungen auf die Verschmelzbarkeit mit Brillenfernteil-Gläsern gemäß DE-OS 30 26 605 und DE-OS 31 21 824 sowie wegen seiner kristallisationshemmenden Wirkungen. Li2O ist ebenfalls nach Anspruch 2 ein Muß"-Bestandteil, da es erkanntermaßen für einen günstigen Viskositätsverlaufim Verschmelzbereich mit Fernteilen sorgt.Claim 2 names the most preferred composition ranges: PbO as a "may" component of claim 1 is claimed as a "must" component 2 included because of its recognized beneficial effects on fusibility with long distance glasses according to DE-OS 30 26 605 and DE-OS 31 21 824 and because of its anti-crystallization effects. Li2O is also according to claim 2 Must "component, as it is recognized for a favorable viscosity curve in the Fusion area with distant parts ensures.

Einige beispielhafte Zusammensetzungen sind in der nachfolgenden Tabelle zusammengestellt.Some exemplary compositions are in the table below compiled.

Die Gläser gemäß dieser Erfindung werden folgendermaßen hergestellt: Die Komponenten (Oxide, Nitrate, Carbonate) werden gemäß Rezept abgewogen; ein kleiner Anteil Läutermittel wird zugegeben, es wird gut gemischt und in einem Pt-Tiegel bis 13000C eingeschmolzen. Nach dem Läutern und Homogenisieren wird bei ca. 980-10000C in eine Eisenform auslaufen gelassen, bzw. sofort zu G>sverarbeitet.The glasses according to this invention are made as follows: The components (oxides, nitrates, carbonates) are weighed according to the recipe; a little Part of the refining agent is added, mixed well and placed in a Pt crucible melted down to 13000C. After lautering and homogenizing, it is at approx. 980-10000C let flow into an iron mold, or immediately processed into G> s.

SiO2 9.45 9.40 7.75 8.70 10.35 8.20 8.05 B2O3 13.60 13.25 14.00 12.75 13.25 12.15 13.00 Li2O 0.85 0.85 1.05 1.65 1.20 0.80 0.50 Na2O 0.75 0.70 0.85 1.10 1.40 - 1.10 K2O 0.80 0.70 1.00 1.70 1.35 1.70 1.15 MgO - - - - - - 2.90 CaO 4.20 5.35 - 10.10 6.25 4.10 -SrO - - - - - 11.10 BaO 5.70 1.45 11.50 - 1.55 5.60 -ZnO 1.50 1.55 4.25 5.70 4.15 1.50 -La2O3 26.30 32.05 22.20 23.85 30.80 23.80 21.35 Y2O3 2.80 2.85 2.65 3.75 4.60 5.50 3.35 Gd2O3 - - - - - - 4.30 ZrO2 7.10 7.00 6.45 7.65 7.50 6.20 5.85 TiO 7.45 9.15 5.30 8.55 10.15 6.90 6.05 PbO 11.60 8.50 14.80 4.45 - 11.40 10.75 Nb2O5 7.90 7.10 8.20 10.05 7.45 6.85 5.80 WO3 - - - - - 2.80 -Ta2O5 - - - - - - 4.75 Al2O3 2.50 nd 1.8580 1.8695 1.8518 1.8446 1.8460 1.8555 1.8540 vd 31.75 31.80 31.70 32.50 33.00 31.80 32.90SiO2 9.45 9.40 7.75 8.70 10.35 8.20 8.05 B2O3 13.60 13.25 14.00 12.75 13.25 12.15 13.00 Li2O 0.85 0.85 1.05 1.65 1.20 0.80 0.50 Na2O 0.75 0.70 0.85 1.10 1.40 - 1.10 K2O 0.80 0.70 1.00 1.70 1.35 1.70 1.15 MgO - - - - - - 2.90 CaO 4.20 5.35 - 10.10 6.25 4.10 -SrO - - - - - 11.10 BaO 5.70 1.45 11.50 - 1.55 5.60 -ZnO 1.50 1.55 4.25 5.70 4.15 1.50 -La2O3 26.30 32.05 22.20 23.85 30.80 23.80 21.35 Y2O3 2.80 2.85 2.65 3.75 4.60 5.50 3.35 Gd2O3 - - - - - - 4.30 ZrO2 7.10 7.00 6.45 7.65 7.50 6.20 5.85 TiO 7.45 9.15 5.30 8.55 10.15 6.90 6.05 PbO 11.60 8.50 14.80 4.45 - 11.40 10.75 Nb2O5 7.90 7.10 8.20 10.05 7.45 6.85 5.80 WO3 - - - - - 2.80 -Ta2O5 - - - - - - 4.75 Al2O3 2.50 nd 1.8580 1.8695 1.8518 1.8446 1.8460 1.8555 1.8540 vd 31.75 31.80 31.70 32.50 33.00 31.80 32.90

Claims (2)

Hochbrechende optische Gläser mit Brechwerten von 1,84 - 1,87 und Abbezahlen von 30 - 33 Patentansprüche: 1j Hochbrechende optische Gläser mit Brechungsindizes von 1.84 - 1.87 und Abbezahlen von 30-33, die insbesondere als Nahteilbrillengläser für entsprechende hochbrechende Fernteilgläser zu verwenden sind, gekennzeichnet durch folgende Zusammensetzung (in Gew.-%): SiO2 7 - 11 B203 11 - 15 Al2O3 0 - 3 SiO2 + B2O3 + A1203 = 20 - 24 Li2O 0 - 2 Na2O 0 - 3 K20 0 - 3 LiO2 + Na2O + K20 = 1,5 - 5 MgO 0 - 5 CaO 0 - 12 SrO 0 - 13 BaO 0 - 13 ZnO 0 - 17 MgO + CaO + SrO + BaO + ZnO = 6-20 La2O3 20 - 34 Y2O3 0 - 7 Gd2O3 0 - 7 La2O3 + Y2O3 + Gd2O3 = 23 - 38 ZrO2 4 - 8 TiO2 4 - 12 PbO 0 - 20 Nb2O5 5 - 12 WO3 0 - 4 ZrO2 + TiO2 + PbO + Nb205 + WO3 = 16-30 Ta2O5 O - 6. High refractive optical glasses with refractive indices of 1.84 - 1.87 and Paying off 30 - 33 claims: 1j high refractive optical glasses with refractive indices from 1.84 - 1.87 and Abbezahlen from 30-33, especially as close-up glasses to be used for corresponding high-refractive binoculars due to the following composition (in% by weight): SiO2 7 - 11 B203 11 - 15 Al2O3 0 - 3 SiO2 + B2O3 + A1203 = 20 - 24 Li2O 0 - 2 Na2O 0 - 3 K20 0 - 3 LiO2 + Na2O + K20 = 1.5 - 5 MgO 0-5 CaO 0-12 SrO 0-13 BaO 0-13 ZnO 0-17 MgO + CaO + SrO + BaO + ZnO = 6-20 La2O3 20 - 34 Y2O3 0 - 7 Gd2O3 0 - 7 La2O3 + Y2O3 + Gd2O3 = 23 - 38 ZrO2 4 - 8 TiO2 4 - 12 PbO 0 - 20 Nb2O5 5 - 12 WO3 0 - 4 ZrO2 + TiO2 + PbO + Nb205 + WO3 = 16-30 Ta2O5 O - 6. 2. Gläser nach Anspruch 1, gekennzeichnet durch folgende Zusammensetzung: SiO2 8,5 - 10,5 B203 12,5 - 14,5 SiO2 + B2O3 = 22 - 24 Li2O 0,5 - 2,0 Na2O 0 - 1,5 K2O 0 - 1,5 Li2O + Na2O + K2O = 1,5 - 3,5 Ca0 0 - 7 SrO 0 - 7 BaO 0 - 13 ZnO 0 - 5 CaO + SrO + BaO + ZnO = 7 - 16 PbO 5 - 20 La203 24 - 32 Y203 2 - 6 La2O3 + Y2O3 = 27 - 32 ZrO2 4,5 - 7,5 TiO2 5 - 12 Nb2O5 7 - 11 TiO2 + Nb205 = 13 - 18.2. Glasses according to claim 1, characterized by the following composition: SiO2 8.5 - 10.5 B203 12.5 - 14.5 SiO2 + B2O3 = 22 - 24 Li2O 0.5 - 2.0 Na2O 0 - 1.5 K2O 0 - 1.5 Li2O + Na2O + K2O = 1.5 - 3.5 Ca0 0-7 SrO 0-7 BaO 0 - 13 ZnO 0 - 5 CaO + SrO + BaO + ZnO = 7 - 16 PbO 5 - 20 La203 24 - 32 Y203 2 - 6 La2O3 + Y2O3 = 27 - 32 ZrO2 4.5 - 7.5 TiO2 5 - 12 Nb2O5 7 - 11 TiO2 + Nb205 = 13 - 18.
DE19823201346 1982-01-18 1982-01-18 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 Expired DE3201346C2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19823201346 DE3201346C2 (en) 1982-01-18 1982-01-18 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
JP539483A JPS58125636A (en) 1982-01-18 1983-01-18 High-refractive index optical glass having refractive index of 1.84-1.87 and abbe number of 30-33

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19823201346 DE3201346C2 (en) 1982-01-18 1982-01-18 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

Publications (2)

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DE3201346A1 true DE3201346A1 (en) 1983-07-28
DE3201346C2 DE3201346C2 (en) 1986-03-13

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Cited By (12)

* 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)
EP0992461A1 (en) * 1998-10-02 2000-04-12 Kabushiki Kaisha Ohara Ophthalmic and optical glasses
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
US20120238436A1 (en) * 2009-11-26 2012-09-20 Yoshihito Taguchi Optical Glass and Optical Element
CN115246707A (en) * 2022-08-26 2022-10-28 成都光明光电股份有限公司 Optical glass, optical element and optical instrument
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
US12515982B2 (en) 2021-03-19 2026-01-06 Corning Incorporated High-index borate glasses

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JPS60122745A (en) * 1983-12-07 1985-07-01 Hoya Corp Optical glass
DE4242859C2 (en) * 1992-08-03 1994-08-25 Schott Glaswerke High-refraction ophthalmic and optical lightweight glass
JP2875709B2 (en) * 1993-04-22 1999-03-31 株式会社オハラ Optical glass
US7528083B2 (en) 2003-06-10 2009-05-05 Kabushiki Kaish Ohara Optical glass
JP4361004B2 (en) 2004-11-15 2009-11-11 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
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JP2011037660A (en) * 2009-08-07 2011-02-24 Ohara Inc Optical glass, lens preform and optical element
JP6096502B2 (en) * 2011-12-20 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
JP6096501B2 (en) * 2011-12-28 2017-03-15 株式会社オハラ Optical glass and optical element
CN102964062A (en) * 2012-09-29 2013-03-13 成都光明光电股份有限公司 Environment-friendly heavy lanthanum flint optical glass
CN110342815B (en) * 2016-05-10 2021-10-26 成都光明光电股份有限公司 Lanthanum flint optical glass
EP3643690A4 (en) 2017-06-23 2021-03-17 AGC Inc. OPTICAL GLASS AND OPTICAL COMPONENT
JP7433764B2 (en) * 2019-01-18 2024-02-20 Hoya株式会社 Method for promoting improvement of transmittance of glass, method for manufacturing glass, and glass

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2820940B2 (en) * 1977-05-19 1980-01-10 K.K. Ohara Kogaku Garasu Seizosho, Sagamihara, Kanagawa (Japan) Optical glass with the optical data refractive index nD equal to 1.770 to 1375 and Abbe number vD equal to 373 to 283

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2820940B2 (en) * 1977-05-19 1980-01-10 K.K. Ohara Kogaku Garasu Seizosho, Sagamihara, Kanagawa (Japan) Optical glass with the optical data refractive index nD equal to 1.770 to 1375 and Abbe number vD equal to 373 to 283

Cited By (17)

* 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)
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
EP0992461A1 (en) * 1998-10-02 2000-04-12 Kabushiki Kaisha Ohara Ophthalmic and optical glasses
US6187702B1 (en) 1998-10-02 2001-02-13 Kabushiki Kaisha Ohara Ophthalmic and optical glasses
US8835336B2 (en) * 2009-11-26 2014-09-16 Konica Minolta Advanced Layers, Inc. Optical glass and optical element
US20120238436A1 (en) * 2009-11-26 2012-09-20 Yoshihito Taguchi Optical Glass and Optical Element
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
US12187644B2 (en) 2020-09-10 2025-01-07 Corning Incorporated Silicoborate and borosilicate glasses having high refractive index and high transmittance to blue light
US12195389B2 (en) 2020-09-10 2025-01-14 Corning Incorporated Silicoborate and borosilicate glasses having high refractive index and low density
US12515982B2 (en) 2021-03-19 2026-01-06 Corning Incorporated High-index borate glasses
CN115246707A (en) * 2022-08-26 2022-10-28 成都光明光电股份有限公司 Optical glass, optical element and optical instrument
CN115246707B (en) * 2022-08-26 2023-09-22 成都光明光电股份有限公司 Optical glass, optical element and optical instrument

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