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. 03, 2006
Filed:
Feb. 08, 2002
Hiroshi Miyazawa, Tokorozawa, JP;
Yoshikazu Oka, Yokohama, JP;
Hiroshi Miyazawa, Tokorozawa, JP;
Yoshikazu Oka, Yokohama, JP;
Kabushiki Kaisha Kenwood, Tokyo, JP;
Abstract
A small photodetector type microphone () exhibiting excellent directivity without requiring any mirror surface. A diaphragm () vibrates in response to a sound pressure. An optical waveguide () is formed along the diameter of the diaphragm () and integral vibration of the optical waveguide () and the diaphragm () causes a variation in the quantity of light leaking from the optical waveguide () to the outside thus causing a variation in the quantity of light being transmitted across the optical waveguide (). The optical waveguide () has one end side for introducing light into a light emitting elements () and the other end side for delivering light to a light receiving element (). The light receiving element () outputs an electric signal related to the quantity of incident light.