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US 2026/0217592 A1Published application
Glass and method for manufacturing glass
AssigneeAGC Inc.
InventorsNaoki KANNO, Koji SHIMIZU
Life of this patent
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Abstract
Deposition of defects is suppressed while a high refractive index and a high transmittance are achieved. A glass (10) contains La2O3 and B2O3, has a refractive index nd of 2.0100 or more, has a total content of Bi2O3 and B2O3 of less than 80% in terms of oxide-based mol %, has a total content of Pt and Fe of 0.5 ppm or more and 15.0 ppm or less in terms of a mass ratio, and has a parameter A defined by the formula (1) of 0.870 or more.
Claims10
A glass comprising La2O3 and B2O3,
- having a refractive index nd of 2.0100 or more, having a total content of Bi2O3 and B2O3 of less than 80% in terms of oxide-based mol %,
- having a total content of Pt and Fe of 0.5 ppm or more and 15.0 ppm or less in terms of a mass ratio, and
- having a parameter A defined by formula (1) of 0.870 or more:
- A
- =
- τ
- 440
- +
- 0.005
- ×
- (
- Pt
- +
- Fe
- )
- (
- 1
- )
- wherein
- τ440 is an internal transmittance with respect to light having a wavelength of 440 nm when a thickness is converted to 10 mm, and
- (Pt+Fe) is a total content (ppm) of Pt and Fe in terms of a mass ratio.
18 more elements
Dependencies are inferred from the claim text.