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. 28, 2005
Filed:
Jul. 31, 2001
Hiroaki Furuichi, Tokyo, JP;
Kazumi Kawamoto, Tokyo, JP;
Katsumi Kuroguchi, Tokyo, JP;
Atsuhiro Yamamoto, Tokyo, JP;
Keiichi Yamada, Tokyo, JP;
Tsutomu Okumura, Tokyo, JP;
Kazuo Takai, Tokyo, JP;
Shohei Hata, Tokyo, JP;
Hiroaki Furuichi, Tokyo, JP;
Kazumi Kawamoto, Tokyo, JP;
Katsumi Kuroguchi, Tokyo, JP;
Atsuhiro Yamamoto, Tokyo, JP;
Keiichi Yamada, Tokyo, JP;
Tsutomu Okumura, Tokyo, JP;
Kazuo Takai, Tokyo, JP;
Shohei Hata, Tokyo, JP;
OpNext Japan, Inc., Yokohama, JP;
Abstract
An optical module for use in detecting a plurality of different wavelengths by making use of the multiple wavelength selectivity of an etalon. The optical module includes a semiconductor laser, a lens for converting a beam emitted from the semiconductor laser into a substantially parallel beam, a beam splitter for splitting the converted beam into a reflected beam and a transmitted beam, and a light-receiving element disposed such that one of the split beams is incident thereupon through an etalon, wherein a center of the reflected beam from the etalon occurring as the beam is incident upon the etalon is arranged to return to a region other than a beam-emitting portion of the semiconductor laser.