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:
Aug. 25, 2009
Filed:
May. 31, 2006
Toshihiro Kikuchi, Fukushima-ken, JP;
Toshihiro Kikuchi, Fukushima-ken, JP;
Alps Electric Co., Ltd., Tokyo, JP;
Abstract
There is provided a low-cost wavelength branching filter that transmits lights of 1310 nm wavelength band, and reflects light of 1490 nm and 1650 nm wavelength bands. In one embodiment, a wavelength branching filter includes a first multilayer film filter positioned in a light incoming side on a glass substrate and a second multilayer film filter positioned in a light outgoing side, and the first multilayer film filter has characteristic in reflecting light of 1490 nm wavelength band and transmitting light of 1310 nm wavelength band, and the second multilayer film filter has characteristic in reflecting light of 1650 nm wavelength band and transmitting light of 1650 nm wavelength band and reflecting light of 1310 nm wavelength band.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile