Glass with a minimal stress-optic effect
AssigneeSchott Glass Technologies, Inc.
InventorsJoseph S. Hayden, Sally Pucilowski
Life of this patent
Estimating the term…
Abstract
A glass comprising in mole percent based on oxide: 1 SiO2 55-70 PbO 30-38 Na2O >0-4.5 K2O 0-2.5 and essentially free of TiO2.
Claims19
A glass comprising in mole percent based on oxide:
- 25 SiO2 55-70 PbO 30-38 Na2O >0-4.5 K2O 0-2.5 and essentially free of TiO2.
A glass comprising in mole percent based on oxide:
- 28 SiO2 49-60 PbO 33-45 Na2O >0-3.5 K2O 0-2.5 and essentially free of TiO2.
A glass made by adding together and melting, in mole percent:
- 31 SiO2 55-70 PbO 30-38 Na2O >0-4.5 K2O 0-2.5
A glass made by adding together and melting, in mole percent:
- 32 SiO2 49-60 PbO 33-45 Na2O >0-3.5 K2O 0-2.5
A glass comprising in mole percent based on oxide:
- 33 SiO2 49-70 PbO 30-45 Na2O 0-5 K2O 0-3 Sum Na2O + K2O >0-5 Sum B2O3 + Al2O3 + Y2O3 + La2O3 + ZnO + 0-10 MoO3 + TaO5 + ZrO2 + WO3 + In2O3
A glass comprising in mole percent based on oxide:
- 34 SiO2 49-70 PbO 30-45 Na2O 0-5 K2O 0-3 Sum Na2O + K2O >0-5 Sum ZrO2 + Al2O3 >0-8.
A glass made by adding together and melting, in mole percent.
- 35 SiO2 49-70 PbO 30-45 Na2O 0-5 K2O 0-3 Sum Na2O + K2O >0-5 Sum B2O3 + Al2O3 + Y2O3 + La2O3 + ZnO + 0-5 MoO3 + TaO5 + ZrO2 + WO3 + In2O3.
A glass comprising lead and silicon, having a SOC of 1.00 to 2.00 and a CR of 3 or less in combination with a SR of 5 or less.
A glass comprising lead and silicon, having a SOC or less than 1.00 and a CR of 4 or less in combination with a SR of 51 or less.
Dependencies are inferred from the claim text.