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:
Mar. 17, 2009
Filed:
Apr. 02, 2004
Peter Schreiber, Jena, DE;
Sergey Kudaev, Jena, DE;
Manfred Hibbing, Wedemark, DE;
Andre Michaelis, Wedemark, DE;
Wolfgang Niehoff, Wedemark, DE;
Vladimir Gorelik, Hannover, DE;
Ruth Weichenhain-schriever, Goettingen, DE;
Juergen Ihlemann, Goettingen, DE;
Peter Schreiber, Jena, DE;
Sergey Kudaev, Jena, DE;
Manfred Hibbing, Wedemark, DE;
Andre Michaelis, Wedemark, DE;
Wolfgang Niehoff, Wedemark, DE;
Vladimir Gorelik, Hannover, DE;
Ruth Weichenhain-Schriever, Goettingen, DE;
Juergen Ihlemann, Goettingen, DE;
Fraunhofer-Gesellschaft zur Foerderung der Angewandten Forschung e.V., Munich, DE;
Sennheiser Electronic GmbH & Co. KG., Wedemark, DE;
Abstract
The invention relates to an arrangement for optically determining the distance of a reflecting surface that can be used, in particular, for determining slight variations in distance such as can frequently occur in vibrating systems. Such an arrangement can also be used as optical microphone or hydrophone. The arrangement according to the invention is designed in this case such that light from a light source is directed onto a reflecting surface via a first optical fiber, and light reflected therefrom is directed onto at least one statically arranged optical detector via the first optical fiber or at least one further optical fiber. An optical element collimating in the direction of the reflecting surface is arranged between the reflecting surface and the one or more optical fibers. Furthermore, at least two optical elements focusing in the direction of the reflecting surface and whose optical axes are aligned parallel to the optical axis of the collimating optical element and are arranged at constant spacings from one another are arranged above the reflecting surface.