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:
Jan. 12, 2016
Filed:
Oct. 28, 2010
Michiko Ogino, Kanagawa, JP;
Masahiro Onozawa, Kanagawa, JP;
Michiko Ogino, Kanagawa, JP;
Masahiro Onozawa, Kanagawa, JP;
OHARA INC., , JP;
Abstract
Provided is optical glass that does not contain lead, which is an environmental pollutant. The optical glass is ideal for the transmission of light even after being exposed to X-rays, and has a high refractive index. The optical glass comprises, by mass % in terms of oxide versus the glass total mass, 1.0% to 60.0% of an SiOcomponent, and one or more selected from the group consisting of an LaOcomponent, ZrOcomponent, TiOcomponent, NbOcomponent, and TaOas essential components. The optical glass has a refractive index (n) of 1.50 or greater, and has a light intensity recovery rate of 45% or greater when the glass having been irradiated with X-rays with a dose of 2.5 Gy is irradiated with light of a xenon lamp for 11 hours.