公开(公告)号：US20230139239A1

公开(公告)日：2023-05-04

申请号：US17915688

申请日：2021-03-25

Applicant: HOYA CORPORATION

Inventor： Kazuo TACHIWANA ,  Hideki MUTO

IPC: C03C3/068 ,  C03C4/00

Abstract: A glass (excluding glass used for optical elements selected from the group consisting of lenses and prisms and glass used for optical fibers) has an oxide-basis glass composition based on a mass basis of a SiO2 content of 0 to 25%, a B2O3 content of 0 to 35%, a P2O5 content of 0 to 30%, a total content of SiO2, B2O3, and P2O5 (SiO2+B2O3+P2O5) of 10 to 45%, an Al2O3 content of 0 to 15%, a Li2O content of 0 to 2%, a Na2O content of 0 to 10%, a K2O content of 0 to 10%, a Rb2O content of 0 to 5%, a Cs2O content of 0 to 5%, a total content of Li2O, Na2O, K2O, Rb2O, and Cs2O (Li2O+Na2O+K2O+Rb2O+Cs2O) of 0 to 15%, and has a wetting angle to water of 60° or more.