Multipoint laser vibrometer with single detector
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United States of America Patent
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Jan 7, 2014
Grant Date -
Sep 27, 2012
app pub date -
Mar 22, 2011
filing date -
Mar 22, 2011
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Abstract
A laser vibrometer makes non-contact measurements of vibrations of a target. A laser produces a laser beam, and a beamsplitter splits the laser beam into a reference beam and a first target beam. A first frequency shifter/splitter splits the first target beam into a pair of target beams each having a frequency different than a frequency of the other target beams. The target beams are reflected from the target to a detector, and the reference beam is combined with the target beams such that the detector receives the target beams and reference beam together.
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