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:
Jan. 06, 2009
Filed:
Nov. 07, 2003
Marc Dubois, Clifton Park, NY (US);
Kent C. Burr, Latham, NY (US);
Thomas E. Drake, Jr., Fort Worth, TX (US);
Peter W. Lorraine, Niskayuna, NY (US);
Marc Dubois, Clifton Park, NY (US);
Kent C. Burr, Latham, NY (US);
Thomas E. Drake, Jr., Fort Worth, TX (US);
Peter W. Lorraine, Niskayuna, NY (US);
Lockheed Martin Corporation, Bethesda, MD (US);
Abstract
The present invention provides an optical filter assembly that reduces the phase and amplitude noise of a detection laser used to detect ultrasonic displacements. The filtered detection laser is directed to the surface of a remote target. Ultrasonic displacements at the surface scatter the filtered detection laser. Collection optics then gather phase modulated light scattered by the surface and direct the phase modulated light to an optical processor to produce a signal representative of the ultrasonic displacements with an improved SNR. Additional processors may determine the structure of the remote target.