METHOD AND APPARATUS FOR RANGE RESOLVED LASER DOPPLER VIBROMETRY
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United States of America Patent
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Issued Date -
May 2, 2013
app pub date -
Oct 31, 2011
filing date -
Oct 31, 2011
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Abstract
In accordance with various aspects of the disclosure, a method and apparatus is disclosed for optically resolving one or more vibrating objects at an unknown distance using a vibrometer. The vibrometer includes a processor, a memory, and an optical device including a transmitter and a receiver. The method includes transmitting a first optical waveform having a linear frequency modulated chirp from the transmitter towards a region of space. At the receiver, a second optical waveform reflected from the one or more vibrating objects in the region of space is received. The vibrometer determines both a vibration frequency and a range information associated with the one or more vibrating objects based upon one or more characteristics of the second optical waveform. The determined vibration frequency and range information are stored in the memory for processing by the processor.
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