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. 30, 2015
Filed:
Jul. 08, 2013
Fujikura Ltd., Tokyo, JP;
Nat'l University Corporation Hokkaido University, Sapporo-shi, Hokkaido, JP;
Shoichiro Matsuo, Sakura, JP;
Katsuhiro Takenaga, Sakura, JP;
Kunimasa Saitoh, Sapporo, JP;
Masanori Koshiba, Sapporo, JP;
FUJIKURA LTD., Tokyo, JP;
NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITY, Sapporo-shi, JP;
Abstract
A radius of a first corein a large-diameter end surface EFof a tapered portionis denoted by r, a radius of a second coreis denoted by r, a relative refractive index difference of the first corewith respect to a cladis denoted by Δ, a relative refractive index difference of the second corewith respect to the cladis denoted by Δ, a refractive index volume of the first coreis denoted by V, and a refractive index volume of the second coreis denoted by V, r/ris set to be 3 or more and 5 or less, V/Vis set to be 1.07r−13.5 or more and 1.07r−11.5 or less, and r/ris set to be −3×Δ/Δ+10 or more.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile