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:
Dec. 20, 2011
Filed:
Oct. 10, 2008
Jie Fu, Kanagawa, JP;
Jie Fu, Kanagawa, JP;
Ohara Inc., Kanagawa, JP;
Abstract
An optical glass having high refractive index and low dispersion properties. There is provided an optical glass having an Abbe number (ν) and a refractive index (n) in a region indicated by a shape bound by connecting three points, A(53, 1.70), B(53, 1.87), and C(40, 1.87) with straight lines on an orthogonal xy-coordinate system with the x-axis designating the Abbe number and the y-axis designating the refractive index; and comprising no less than 25% and no more than 65% of a combination of a SiOcomponent and a BOcomponent, no less than 20% and no more than 55% of a LnOcomponent (Ln represents at least one species selected from the group consisting of La, Gd, Dy, Yb, and Lu), and a ratio of a LaOcomponent to a LnOcomponent being no more than 0.6, by mol % on the basis of oxides.