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:
Dec. 06, 2005
Filed:
Mar. 31, 2003
Amit K. Lal, Ladera Ranch, CA (US);
Cecil F. Hess, Irvine, CA (US);
Hansheng Zhang, Aliso Viejo, CA (US);
L. Ernesto Hurtado, Laguna Niguel, CA (US);
Vladimir B. Markov, Irvine, CA (US);
Vyacheslav Aranchuk, Oxford, MS (US);
Amit K. Lal, Ladera Ranch, CA (US);
Cecil F. Hess, Irvine, CA (US);
Hansheng Zhang, Aliso Viejo, CA (US);
L. Ernesto Hurtado, Laguna Niguel, CA (US);
Vladimir B. Markov, Irvine, CA (US);
Vyacheslav Aranchuk, Oxford, MS (US);
MetroLaser, Inc., Irvine, CA (US);
Abstract
A multi-beam laser Doppler vibrometer simultaneously measures velocity, displacement, and vibration history of multiple locations on an object. A beam of coherent light is split into an object beam and a reference beam. The object beam is divided into a plurality of object beams to simultaneously illuminate multiple locations on the object under inspection. The reference beam is frequency shifted and split into a corresponding plurality of frequency-shifted reference beams. A portion of each object beam is reflected by the object as a modulated object beam. The plurality of modulated object beams are collected and respectively mixed with the plurality of frequency-shifted reference beams to provide a plurality of beam pairs. Each beam pair may be focused onto a photodetector or an optical fiber connected to a photodetector.