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:
Jun. 26, 2012
Filed:
Jan. 29, 2009
Applicants:
Susumu Uehara, Sagamihara, JP;
Kiyoyuki Momono, Sagamihara, JP;
Inventors:
Susumu Uehara, Sagamihara, JP;
Kiyoyuki Momono, Sagamihara, JP;
Assignee:
Ohara Inc., Sagamihara-shi, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C03C 3/155 (2006.01); C03C 3/068 (2006.01);
U.S. Cl.
CPC ...
Abstract
Provided is an optical glass having optical constants, a refractive index (n) of more than 1.9 and an Abbe number (νd) of not more than 38, having a small partial dispersion ratio and capable of being produced from inexpensive materials. The optical glass has a partial dispersion ratio (θg, F) of at most 0.615, and contains, as indispensable ingredients, BO, LaO, TiO, NbOand TaO, wherein the ratio, as % by mass, of TiO/NbOis at most 0.26 and GeO/NbOis at most 0.38. The optical glass contains, in terms of % by mass, the following ingredients: and