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:
Oct. 09, 2007
Filed:
Aug. 26, 2004
Yuji Goto, Minato-ku, JP;
Mikio Kitaoka, Minato-ku, JP;
Hiromitsu Umezawa, Minato-ku, JP;
Tsugio Tokumasu, Minato-ku, JP;
Toshihiko Watanabe, Minato-ku, JP;
Akitoshi Mesaki, Minato-ku, JP;
Takashi Kato, Minato-ku, JP;
Masaharu Hoshikawa, Minato-ku, JP;
Chiharu Nishida, Minato-ku, JP;
Yuji Goto, Minato-ku, JP;
Mikio Kitaoka, Minato-ku, JP;
Hiromitsu Umezawa, Minato-ku, JP;
Tsugio Tokumasu, Minato-ku, JP;
Toshihiko Watanabe, Minato-ku, JP;
Akitoshi Mesaki, Minato-ku, JP;
Takashi Kato, Minato-ku, JP;
Masaharu Hoshikawa, Minato-ku, JP;
Chiharu Nishida, Minato-ku, JP;
FDK Corporation, Tokyo, JP;
Abstract
It is possible to reduce the size of a magneto-optical device, increase the speed of optical control, simplify power supply structure and its control, and maintain a Faraday rotation angle in an arbitrary state even after shut-off of the excitation current. The magneto-optical device includes a magnetic yoke () made of a high-permeability magnetic material, the magnetic yoke including a tabular portion () and four pillar portions () protruding from one side of the tabular portion (), a coil () wound on each of the pillar portions, and a magneto-optical element () arranged in an open-magnetic-circuit region surrounded by the end portions of the four pillar portions. A magnetic field obtained by a coil is applied to the magneto-optical element.