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. 26, 2014
Filed:
Apr. 24, 2012
Takuya Iwamoto, Osaka, JP;
Masahiko Hashimoto, Osaka, JP;
Ushio Sangawa, Nara, JP;
Yuriko Kaneko, Nara, JP;
Takuya Iwamoto, Osaka, JP;
Masahiko Hashimoto, Osaka, JP;
Ushio Sangawa, Nara, JP;
Yuriko Kaneko, Nara, JP;
Panasonic Corporation, Osaka, JP;
Abstract
There is provided an optical microphone for detecting an acoustic wave propagating in an ambient fluid, the optical microphone including: a propagation medium section; a light source for emitting a light wave to be transmitted through a diffraction region in the propagation medium section; and a photoelectric conversion section for detecting the light wave having been transmitted through the propagation medium section. A first acoustic wave which is a portion of the acoustic wave and a second acoustic wave which is another portion thereof are allowed to propagate in the propagation medium section so as to simultaneously arrive at the diffraction region, and an interference component between a +1order diffracted light wave and a −1order diffracted light wave of the light wave generated based on a refractive index distribution of the propagation medium occurring in the diffraction region.