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:
Nov. 15, 2005
Filed:
Dec. 10, 2002
Tomomi Sano, Yokohama, JP;
Hiroshi Suganuma, Yokohama, JP;
Tamoya Kenmochi, Hashimoto, JP;
Tetsuya Iimura, Yokohama, JP;
Manabu Shiozaki, Yokohama, JP;
Tomomi Sano, Yokohama, JP;
Hiroshi Suganuma, Yokohama, JP;
Tamoya Kenmochi, Hashimoto, JP;
Tetsuya Iimura, Yokohama, JP;
Manabu Shiozaki, Yokohama, JP;
Sumitomo Electric Industries, Ltd., Osaka, JP;
Abstract
A first optical system () has a first beam splitter (). The first beam splitter () splits light arriving through a first optical path (P) into two light beams, and outputs one light beam to a second optical path (P) and the other light beam to a third optical path (P). A second optical system () outputs the light output from the first beam splitter () to the second optical path (P) and arriving at the second optical system () upon giving the light an intensity change with wavelength dependence and a phase change, and has a second beam splitter (), first reflecting mirror (), and second reflecting mirror (). This makes it possible to provide an optical filter () which can realize a characteristic excellent in isolation with a very simple arrangement.