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:
Aug. 16, 2011
Filed:
Apr. 27, 2006
Jie Fu, Kanagawa, JP;
Jie Fu, Kanagawa, JP;
Ohara Inc., Sagamihara-shi, Kanagawa, JP;
Abstract
Optical glass having a refractive index (n) of 1.85 or greater, and an Abbe number (ν) falling within the range of 10 to 30, which is suited for molding by precision mold press is provided. The optical glass is characterized by including BO+SiOin an amount of 3 to 60%, BiOin an amount of 25 to 80%, RO+RnO in an amount of 5 to 60% (wherein R represents one or more selected from a group consisting of Zn, Ba, Sr, Ca, and Mg; and Rn represents one or more selected from a group consisting of Li, Na, K, and Cs), with each component in the range expressed in oxide-based mole percentage, and is characterized in that transparency in the visible region is high, and that the transition point (Tg) is 480° C. or lower. The optical glass is characterized by having a spectral transmittance of 70% or greater at a wavelength of 600 nm for a thickness of 10 mm.