公开(公告)号：US20220324749A1

公开(公告)日：2022-10-13

申请号：US17640341

申请日：2020-08-19

Applicant: OHARA INC.

Inventor： KEISUKE SHIMAMURA ,  TOSHITAKA YAGI ,  KOHEI OGASAWARA

IPC: C03C10/00 ,  C03C4/18 ,  C03C21/00

Abstract: Crystallized glass and strengthened crystallized glass with a novel composition, which have a high refractive index and high hardness, are provided. A crystallized glass, including, by mass % in terms of oxide, 20.0% or more and less than 40.0% of a SiO2 component, more than 0% and 20.0% or less of a Rn2O component, where Rn is one or more selected from Li, Na, and K, 7.0% to 25.0% of an Al2O3 component, 0% to 25.0% of a MgO component, 0% to 45.0% of a ZnO component, and 0% to 20.0% of a Ta2O5 component, in which a total amount of the MgO component, the ZnO component, and the Ta2O5 component is 10.0% or more.

公开(公告)号：US20240351936A1

公开(公告)日：2024-10-24

申请号：US18686875

申请日：2022-07-12

Applicant: OHARA INC.

Inventor： SAYA KIKKAWA ,  KEISUKE SHIMAMURA

IPC: C03C3/097 ,  C03C3/062

CPC classification number: C03C3/097 ,  C03C3/062

Abstract: Provided is a chemically strengthened optical glass having an improved impact resistance and a high hardness while maintaining the refractive index, the Abbe number and the transmittance required in the conventional optical glasses. The chemically strengthened optical glass has a compressive stress layer on the surface thereof, contains, in mass % in terms of oxide, 20.0-50.0% of an SiO2 component, 10.0-45.0% of a TiO2 component and 0.1-20.0% of an Na2O component, has a refractive index (nd) of 1.65-1.85, and is characterized by having an impact resistance of 8 cm or more in a sandpaper falling ball test in which a 16.0 g SUS ball is dropped thereon.