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:
Jul. 05, 2005
Filed:
Sep. 27, 2002
Yasuhiro Nishi, Tokyo, JP;
Hideyuki Nasu, Tokyo, JP;
Takehiko Nomura, Tokyo, JP;
Hiroshi Matsuura, Tokyo, JP;
Atsushi Shimizu, Tokyo, JP;
Jun Yoshino, Tokyo, JP;
Yasuhiro Nishi, Tokyo, JP;
Hideyuki Nasu, Tokyo, JP;
Takehiko Nomura, Tokyo, JP;
Hiroshi Matsuura, Tokyo, JP;
Atsushi Shimizu, Tokyo, JP;
Jun Yoshino, Tokyo, JP;
The Furukawa Electric Company, Ltd., Tokyo, JP;
Abstract
On a second thermo-module there are disposed a prism, an optical filter, and a sub-mount, via a base respectively. On the front side of the sub-mount, there are disposed a first photodetector and a second photodetector. The optical filter is structured with a crystal member that satisfies a condition that α+(1/n)×(Δn/ΔT) becomes not more than 3.5, where α is a coefficient of linear expansion, nis a refractive index at a normal temperature, and Δn is a change of a refractive index corresponding to a temperature variation ΔT.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile