Optical glass

An optical glass comprising, in % by weight 21.0 to 35.0% SiO2; 0 to 10.0% B2O3; 0 to 4.0% Al2O3; 0.5 to 4.0% Li2O; 33.0 to 55.0% BaO+SrO+CaO+MgO+ZnO, with the proviso of 19.0 to 45.0% BaO, 0 to 15.0% SrO, 0 to 20.0% CaO, 0 to 5.0% MgO, and 1.5 to 20.0% ZnO; 8.0 to 23.0% La2O3; 2.0 to 8.0% ZrO2; 0 t...

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Bibliographic Details
Main Author TAJIMA; HIDEMI
Format Patent
LanguageEnglish
Published 06.11.1984
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Summary:An optical glass comprising, in % by weight 21.0 to 35.0% SiO2; 0 to 10.0% B2O3; 0 to 4.0% Al2O3; 0.5 to 4.0% Li2O; 33.0 to 55.0% BaO+SrO+CaO+MgO+ZnO, with the proviso of 19.0 to 45.0% BaO, 0 to 15.0% SrO, 0 to 20.0% CaO, 0 to 5.0% MgO, and 1.5 to 20.0% ZnO; 8.0 to 23.0% La2O3; 2.0 to 8.0% ZrO2; 0 to 10.0% TiO2; 0 to 4.5% Nb2O5+Ta2O5; 0 to 5.0% WO3; and 0 to 5.0% PbO.
Bibliography:Application Number: US19840602104