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. 23, 2006
Filed:
Dec. 10, 2004
Nobuhiro Fukushima, Kanagawa, JP;
Hidenori Nakada, Aichi, JP;
Tsugio Tokumasu, Shizuoka, JP;
Yuko Ota, Shizuoka, JP;
Nobuhiro Fukushima, Kanagawa, JP;
Hidenori Nakada, Aichi, JP;
Tsugio Tokumasu, Shizuoka, JP;
Yuko Ota, Shizuoka, JP;
Fujitsu Limited, Kanagawa, JP;
FDK Corporation, Tokyo, JP;
Abstract
A variable optical filter comprises a first polarizer, a first phase difference element operable to generate a phase difference, a variable Faraday rotator operable to impart a variable Faraday rotation, a second phase difference element operable to generate a phase difference, and a second polarizer, wherein said polarizers, said variable Faraday rotator, and said phase difference elements are arranged in the mentioned order along the optical axis, and wherein when the angles formed by the optic axes of said first and second phase difference elements and the transmitted polarization azimuth of the first polarizer are assumed respectively to be φand φ, these φand φare set to different angles.