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. 27, 2012
Filed:
Jan. 09, 2009
Kinichi Sasaki, Kunitachi, JP;
Masao Takahashi, Fujisawa, JP;
Masahiro Hamaguchi, Mie, JP;
Takashi Miyabe, Kawasaki, JP;
Tsuyoshi Kuwabara, Mie, JP;
Tokihiro Umemura, Mie, JP;
Kinichi Sasaki, Kunitachi, JP;
Masao Takahashi, Fujisawa, JP;
Masahiro Hamaguchi, Mie, JP;
Takashi Miyabe, Kawasaki, JP;
Tsuyoshi Kuwabara, Mie, JP;
Tokihiro Umemura, Mie, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Toshiba Industrial Products Manufacturing Corporation, Mie-ken, JP;
Abstract
The present invention provides a photosensor that uses a phase modulation technique for optical detection and conducts a highly accurate measurement. The photosensor uses a phase change difference of light propagated through a polarization preserving fiber with respect to tensile stress and employs proper polarization preserving fibers for a phase modulator, light-transmitting polarization preserving fiber, and coil-shaped polarization preserving fiber, to achieve a highly accurate measurement.