Patent ID: 7998891

Claim:
An optical glass, comprising: Bi 2 O 3 in an amount of 25 to 43%; B 2 O 3 +SiO 2 in an amount of 3 to 60%; Li 2 O+Na 2 O+K 2 O in an amount of no less than 8.5%; P 2 O 5 in an amount of 0 to 8%; and a content of GeO 2 of in an amount of 0 to 5%, expressed in oxide-based mole percentage; wherein the optical glass has a refractive index (n d ) of 1.85 or greater, and an Abbe number (ν d ) of 10 to 30, and wherein a wavelength at which spectral transmittance of 70% is exhibited is no more than 600 nm in a sample having a thickness of 10 mm.