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. 25, 2012
Filed:
Oct. 22, 2009
Atsushi Nagaoka, Sagamihara, JP;
Jie Fu, Sagamihara, JP;
Michiko Ogino, Sagamihara, JP;
Ohara Inc., Kanagawa, JP;
Abstract
An optical glass is provided that includes a refractive index (n) of no less than 1.75 and an Abbe number (v) of no less than 10 as optical constants. A BiOcontent is no less than 10% by weight to no more than 80% by weight. The content of SiOis lower than the content of BO. The total content of SiO+BOis from no less than 1% by weight to no more than 60% by weight. The content of RO is from no less than 0.1% by weight to no more than 50% by weight. R represents one or more elements selected from the group consisting of Zn, Ba, Sr, Ca, and Mg. The optical glass has at least one of the properties of being substantially free from opacification and/or being substantially devitrified within the glass body under the conditions of a reheating testing.