The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 23, 2025
Filed:
Mar. 24, 2021
Ohara Inc., Kanagawa, JP;
Saya Kikkawa, Kanagawa, JP;
OHARA INC., Kanagawa, JP;
Abstract
Provided is a chemically strengthened optical glass with improved crack resistance and high hardness, in which the refractive index and the Abbe number required for a conventional optical glass are maintained. The chemically strengthened optical glass includes a compressive stress layer on a surface, and contains, by mass % in terms of oxide: 2.0 to 20.0% of a SiOcomponent, 5.0 to 35.0% of a BOcomponent, 20.0 to 60.0% of a LaOcomponent, 2.0 to 25.0% of a TiOcomponent, 2.0 to 15.0% of a NbOcomponent, and more than 0% to 10.0% of a LiOcomponent, and the chemically strengthened optical glass is characterized in that an Hv change rate defined as [(Hv−Hv)/Hv]×100 is equal to or greater than 3.0%.