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US 7,582,580 B2Granted
Optical glass
AssigneeAsahi Glass Company, Limited
InventorsHiroyuki Ohkawa, Jun Sasai, Naoki Sugimoto
Life of this patent
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Abstract
The present invention provides an optical glass including, by mass %: 46 to 70 of B2O3; 3 to 10 of Li2O; 5 to 15 of Y2O3; 0 to 46 of SiO2: 0 to 20 of Al2O3: 0 to 40 of MgO+CaO+SrO+BaO; 0 to 30 of La2O3; and 0 to 10 of ZrO2+TiO2+Gd2O3.
Claims3
An optical glass comprising, by mass %:
- 46 to 70 of B2O3;
- 3 to 10 of Li2O;
- 5 to 15 of Y2O3;
- 0 to 46 of SiO2:
- 0 to 20 of Al2O3:
- 0 to 40 of MgO+CaO+SrO+BaO;
- 0 to 30 of La2O3;
- and
- 0 to 10 of ZrO2+TiO2+Gd2O3.
6 more elements
An optical glass comprising, by mass %:
- 47 to 65 of B2O3;
- 4 to 9 of Li2O;
- 6 to 12 of Y2O3;
- 0 to 25 of SiO2;
- 0 to 10 of Al2O3;
- 0 to 30 of MgO+CaO+SrO+BaO;
- 0 to 20 of La2O3;
- and
- 0 to 5 of ZrO2+TiO2+Gd2O3.
6 more elements
An optical glass comprising, by mass %:
- 48 to 60 of B2O3;
- 5 to 8 of Li2O;
- 7 to 11 of Y2O3;
- 0 to 12 of SiO2;
- 0 to 5 of Al2O3;
- 0 to 25 of MgO+CaO+SrO+BaO;
- 0 to 15 of La2O3;
- and
- 0 to 3 of ZrO2+TiO2+Gd2O3.
6 more elements
Dependencies are inferred from the claim text.