Optical glass

An optical glass comprising in mass %: The optical glass should preferably contain 0.1 - 5% WO3, 3.6 - 15% MgO, 0.1 - 5% Li2O + Na2O + K2O, 0 - less than 0.5% and Sb2O3 + As2O3 with the mass ratio of ZnO/BaO being 0.12 - less than 0.50. The optical glass should preferably have refractive index (nd)...

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Bibliographic Details
Main Author ONOZAWA MASAHIRO,MORI KATSUO
Format Patent
LanguageEnglish
Published 14.03.2007
Subjects
CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS
CHEMISTRY
GLASS
JOINING GLASS TO GLASS OR OTHER MATERIALS
METALLURGY
MINERAL OR SLAG WOOL
SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS
SURFACE TREATMENT OF GLASS
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Summary:An optical glass comprising in mass %: The optical glass should preferably contain 0.1 - 5% WO3, 3.6 - 15% MgO, 0.1 - 5% Li2O + Na2O + K2O, 0 - less than 0.5% and Sb2O3 + As2O3 with the mass ratio of ZnO/BaO being 0.12 - less than 0.50. The optical glass should preferably have refractive index (nd) within a range from 1.54 to 1.65 and Abbe number ( nu d) within a range exceeding 57 up to 69 and liquid phase temperature within a range from 870 DEG C to 930 DEG C. There is provided an optical glass having high resistance to devitrification and medium refractive index and low dispersion characteristics which is free of ingredients such as Ta2O5 having a high cost of raw material and therefore can be manufactured at a relatively low cost of raw materials.
Bibliography:Application Number: CN2003804265