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.
Full Text
What is claimed is:
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.
Timeline
Filed
03/27/2026Published
07/30/2026Granted
Not AvailableIPC Codes(4)
C03C 3/068:containing rare earths
C03C 3/066:containing zinc
G02B 27/00:Optical systems or apparatus not provided for by any of the groups