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US 9,169,153 B2Granted
Optical glass and optical element
AssigneeNippon Electric Glass Co., Ltd.
InventorsSatoko Konoshita, Akihiko Sakamoto, Michel Woy
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Abstract
Provided is an optical glass having desired optical properties, excellent weather resistance, and high mass productivity. An optical glass having a glass composition, in % by mole based on oxide, of 5 to 40% P2O5, 1 to 35% SO3, 10 to 30% R′2O (where R′ is Li, Na or K), 20 to 50% RO (where R is Mg, Ca, Sr, Ba or Zn), and 0.001 to 15% CuO+Fe2O3+CoO+CeO2.
Claims3
An optical glass having a glass composition, in % by mole based on oxide, of 5 to 40% P2O5, 1 to 35% SO3, 10 to 30% R′2O (where R′ is Li, Na or K), 20 to 50% RO (where R is Mg, Ca, Sr, Ba or Zn), and 0.001 to 15% CuO+Fe2O3+CoO+CeO2.
Dependencies are inferred from the claim text.