초록

A glass comprising in mole percent based on oxide:SiO255-70PbO30-38Na2O>0-4.5K2O?0-2.5and essentially free of TiO2.

대표청구항 ▼

1. A glass having a SOC of about 1-2, a CR of about 3 or less and a SR of about 5 or less, comprising in mole percent based on oxide:SiO255-<70PbO30-38Na2O>0-4.5K2O?0-2.5>0-5% Al2O3, >0-5% ZrO2, and essentially free of TiO2. 2. A glass according to claim 1, comprising in mole percent bas

1. A glass having a SOC of about 1-2, a CR of about 3 or less and a SR of about 5 or less, comprising in mole percent based on oxide:SiO255-<70PbO30-38Na2O>0-4.5K2O?0-2.5>0-5% Al2O3, >0-5% ZrO2, and essentially free of TiO2. 2. A glass according to claim 1, comprising in mole percent based on oxide:Al2O30.1-5.0ZrO20.1-5.0Sum Al2O3 + ZrO2>0-8.?3. A glass according to claim 2 further comprising in mole percent based on oxide:ZnO?0-5.0As2O3>0-0.4.4. A glass according to claim 1, further comprising in mole percent based on oxide:ZnO?0-5.0As2O3>0-0.4.5. A glass according to claim 1, wherein the glass comprises in mole percent based on oxide 0.1-5% Al2O3 or ZrO2.6. A glass having a SOC of less than about 1, a CR of about 4 or and a SR of about 5 or less, and comprising in mole percent based on oxide:SiO249-60PbO33-45Na2O>0-3.5K2O?0-2.5>0-5% Al2O3, >0-5% ZrO2, and essentially free of TiO2. 7. A glass according to claim 6, comprising in mole percent based on oxide:Al2O30.1-5.0ZrO20.1-5.0Sum Al2O3 + ZrO2?>0-8.8. A glass according to claim 6 further comprising in mole percent based on oxide:ZnO?0-5.0As2O3>0-0.4.9. A glass according to claim 6, wherein the glass comprises in mole percent based on oxide 0.1-5% Al2O3 or ZrO2.10. A glass having a SOC of about 1-2, a CR of about 3 or less, and a SR of about 5 or less, and made by adding together and melting, in mole percent:SiO255-<70PbO30-38Na2O>0-4.5K2O?0-2.5>0-5% Al2O3, >0-5% ZrO2, and essentially free of TiO2. 11. A glass according to claim 10, wherein the glass comprises in mole percent based on oxide 0.1-5% Al2O3 or ZrO2.12. A glass having a SOC of less than about 1, a CR of about 4 or less, and a SR of about 5 or less, and made by adding together and melting, in mole percent:SiO249-60PbO33-45Na2O>0-3.5K2O?0-2.5>0-5% Al2O3, >0-5% ZrO2, and essentially free of TiO2. 13. A glass according to claim 12, wherein the glass comprises in mole percent based on oxide 0.1-5% Al2O3 or ZrO2.14. A glass having a SOC of less than 2, a CR of 3 or less, and a SR of 5 or less, and comprising in mole percent based on oxide:SiO249-<70PbO30-45Na2O?0-5K2O?0-3Sum Na2O + K2O>0-5Sum B2O3 + Al2O3 + Y2O3 + La2O3 + ZnO +?0-10MoO3 + TaO5 + ZrO2 + WO3 + In2O3>0-5% Al2O3, >0-5% ZiO2, and essentially free of TiO2. 15. A glass according to claim 14, wherein the glass comprises in mole percent based on oxide 0.1-5% Al2O3 or ZrO2.16. A glass having a SOC of 1-2, a CR of 3 or less, and a SR of 5 or less, and comprising in mole percent based on oxide:SiO249-<70PbO30-45Na2O?0-5K2O?0-3Sum Na2O + K2O>0-5Sum ZrO2 + Al2O3>0-8>0-5% Al2O3, >0-5% ZrO2, and essentially free of TiO2. 17. A glass according to claim 16, wherein the glass comprises in mole percent based on oxide 0.1-5% Al2O3 or ZrO2.18. A glass having a SOC of 1-2, a CR of 3 or less, and a SR of 5 or less, and made by adding together and melting, in mole percent:SiO249-<70PbO30-45Na2O?0-5K2O?0-3Sum Na2O + K2O>0-5Sum B2O3 + Al2O3 + Y2O3 + La2O3 + ZnO +?0-5MoO3 + TaO5 + ZrO2 + WO3 + In2O3>0-5% Al2O3, >0-5% ZrO2, and essentially free of TiO2. 19. A glass according to claim 18, wherein the glass comprises in mole percent based on oxide 0.1-5% Al2O3 or ZrO2.20. An optical glass, comprising in mole percent based on oxide:SiO255-<70PbO30-38Na2O>0-4.5K2O?0-2.5>0-5% Al2O3, >0-5% ZrO2, and essentially free of TiO2. 21. An optical glass, comprising in mole percent based on oxide:SiO249-60PbO33-45Na2O>0-3.5K2O?0-2.5>0-5% Al2O3, >0-5% ZrO2, and essentially free of TiO2. 22. An optical glass made by adding together and melting, in mole percent:SiO255-<70PbO30-38Na2O>0-4.5K2O?0-2.5>0-5% Al2O3, >0-5% ZrO2, and essentially free of TiO2. 23. An optical glass made by adding together and melting, in mole percent:SiO249-60PbO33-45Na2O>0-3.5K2O?0-2.5>0-5% Al2O3, >0-5% ZrO2, and essentially free of TiO2. 24. An optical glass, comprising in mole percent based on oxide:SiO249-<70PbO30-45Na2O?0-5K2O?0-3Sum Na2O + K2O>0-5Sum B2O3 + Al2O3 + Y2O3 + La2O3 + ZnO +?0-10MoO3 + TaO5 + ZrO2 + WO3 + In2O3>0-5% Al2O3, >0-5% ZrO2, and essentially free of TiO2. 25. An optical glass, comprising in mole percent based on oxide:SiO249-<70PbO30-45Na2O?0-5K2O?0-3Sum Na2O + K2O>0-5Sum ZrO2 + Al2O3>0-8>0-5% Al2O3, >0-5% ZrO2, and essentially free of TiO2. 26. An optical glass made by adding together and melting, in mole percent:SiO249-<70PbO30-45Na2O?0-5K2O?0-3Sum Na2O + K2O>0-5Sum B2O3 + Al2O3 + Y2O3 + La2O3 + ZnO +?0-5MoO3 + TaO5 + ZrO2 + WO3 + In2O3>0-5% Al2O3, >0-5% ZrO2, and essentially free of TiO2.