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:
Nov. 15, 2011
Filed:
Sep. 01, 2006
Atsushi Nagaoka, Sagamihara, JP;
Jie Fu, Sagamihara, JP;
Michiko Ogino, Sagamihara, JP;
Ohara Inc., Sagamihara-Shi, JP;
Abstract
The present invention provides optical glasses containing BiOin which the optical glasses have at least one of the properties of being substantially free from opacification and being substantially devitrified within the glass body during reheating steps in production processes, superior chemical durability, and free from black coloring. The optical glass has a refractive index (n) of no less than 1.75 and an Abbe number (ν) of no less than 10 as optical constants. The optical glass contains BiOin a content from no less than 10% by weight to less than 90% by weight, and has at least one of the properties of being substantially free from opacification and being substantially devitrified within the glass body under the conditions of a reheating test (a).