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. 05, 1995
Filed:
Nov. 12, 1993
Satoshi Noda, Tokyo, JP;
Olympus Optical Co., Ltd., Tokyo, JP;
Abstract
A gradient index silicate glass is disclosed, which comprises a silicate glass and, incorporated therein, barium, at least one first metal selected from the group consisting of lead, titanium, niobium and tantalum and at least one second metal selected from the group consisting of potassium and sodium. The barium and the first and second metals have either protrudent and recessed concentration distribution profiles, respectively, or recessed and protrudent concentration distribution profiles, respectively. The gradient index silicate glass has a dispersion distribution of A DIRECTION permitting a highly effective optical design, and can be stably produced at low cost on a large commercial scale.