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. 03, 2006
Filed:
Apr. 17, 2003
Roger Martin Langdon, Chelmsford, GB;
Roger Martin Langdon, Chelmsford, GB;
BAE Systems plc, London, GB;
Abstract
Apparatus and method for identifying a remote target () is described. The remote target () is illuminated with radiation () generated by a laser () and the radiation scattered by the target () is modulated in phase by the surface () vibrations of the target (). A portion of the scattered radiation is collected by multiple optical receivers () and demodulated by a phase demodulator to generate a signal proportional to the vibrational displacement of the remote target (). The radiation scattered by the remote target () will also include laser 'speckle', generated when radiation is scattered by a rough solid surface. This speckle can generate errors in the signal demodulated, which can in turn cause identification errors. Apparatus is disclosed where the signals generated are substantially unaffected by laser speckle, improving the accuracy of remote target identification.