Optical boroaluminate glasses
AssigneeCorning Incorporated
InventorsBruce Gardiner Aitken, Lina Ma, John Christopher Mauro
Life of this patent
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Abstract
An optical boroaluminate glass article comprises: from greater than or equal to 10.0 mol % to less than or equal to 30.0 mol % Al2O3; from greater than or equal to 10.0 mol % to less than or equal to 55.0 mol % CaO; from greater than or equal to 10.0 mol % to less than or equal to 25.0 mol % B2O3; from greater than or equal to 0.0 mol % to less than or equal to 30.0 mol % SiO2; and from greater than or equal to 1.0 mol % to less than or equal to 20.0 mol % refractive index raising components. The optical boroaluminate glass article has a refractive index of the glass article, measured at 589.3 nm, of greater than or equal to 1.62, and a density of less than or equal to 4.00 g/cm3.
Claims20
An optical boroaluminate glass article comprising:
- from greater than or equal to 10.0 mol % to less than or equal to 30.0 mol % Al2O3;
- from greater than or equal to 10.0 mol % to less than or equal to 55.0 mol % CaO;
- from greater than or equal to 10.0 mol % to less than or equal to 25.0 mol % B2O3;
- from greater than or equal to 0.0 mol % to less than or equal to 30.0 mol % SiO2;
- and
- one of:
- (a) La2O3 from greater than or equal to 3.0 mol % to less than or equal to 8.0 mol %, or (b) Nb2O5 from greater than or equal to 4.0 mol % to less than or equal to 20.0 mol %, wherein
- the optical boroaluminate glass article has a refractive index, measured at 589.3 nm, of greater than or equal to 1.62, and
- the optical boroaluminate glass article has a density of less than or equal to 4.00 g/cm3.
Dependencies are inferred from the claim text.