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. 16, 2007
Filed:
Oct. 07, 2003
Bernd Granz, Oberasbach, DE;
Ralf Nanke, Spardorf, DE;
Bernd Granz, Oberasbach, DE;
Ralf Nanke, Spardorf, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
An optical hydrophone for measurement of the acoustic pressure distribution in a fluid medium has a light source that illuminates an area of a boundary region between an optically transparent body and the fluid medium. A light receiver measures the intensity of the light reflected from the illuminated area as a measurement of acoustic pressure, due to changes in the index of refraction of the fluid medium that are caused by the acoustic pressure. The illuminated area is smaller than the boundary surface formed between the optically transparent body and the fluid medium, thereby giving the hydrophone a longer service light and a high spatial resolution capacity.