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:
May. 16, 2006
Filed:
Jan. 17, 2002
Naoki Matsushima, Yokohama, JP;
Kazumi Kawamoto, Yokohama, JP;
Koichiro Tonehira, Machida, JP;
OpNext Japan, Inc., Yokohama, JP;
Abstract
A semiconductor laser and an optical fiber are optically coupled via a first lens and a second lens, the second lens is previously fixed to a module package and these parts are mounted to the module package, when focal lengths of the first lens and the second lens are respectively designated by fand f, an optical distance between a principal plane of the first lens on its side of the second lens and a principal plane of the second lens on its side of the first lens, is made substantially equal to f+f. Thereby, there is provided an optical transmission module having low price capable of achieving a high coupling efficiency with high yield.