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:
May. 10, 2011
Filed:
Oct. 18, 2007
Dennis Peter Villanucci, Chelmsford, MA (US);
Peter Nicholas Baum, Chelmsford, MA (US);
Ilya Schiller, Brookline, MA (US);
Dennis Peter Villanucci, Chelmsford, MA (US);
Peter Nicholas Baum, Chelmsford, MA (US);
Ilya Schiller, Brookline, MA (US);
Visidyne, Inc., Burlington, MA (US);
Abstract
A passive, remote sensor including an optical subsystem for receiving electromagnetic radiation scattered off a surface. A detector is responsive to electromagnetic radiation received by the optical subsystem and generates a composite signal comprising a DC current component and an AC current component. A filter extracts the DC current component from the composite signal. A light emitting device is driven by the DC current component. A detector is responsive to the light emitting device and is connected to the first detector to subtract at least a portion of the DC component from the composite signal producing a modified signal. An amplifier is responsive to the modified signal detects vibrations of the surface to be detected.