Te. Mcdevitt et Cs. Vikram, AN INVESTIGATION OF PSEUDOVIBRATION SIGNALS IN DUAL-BEAM LASER VIBROMETRY, Review of scientific instruments, 68(4), 1997, pp. 1753-1755
The role of speckles in generating erroneous laser vibrometer signals
in the case of a beam undergoing flexural and longitudinal motion is i
nvestigated. As illustrated by experimental results, spurious signals,
brought about predominantly by flexural motion in this case, can be r
emoved by increasing the speckle size at the photodetector plane. The
approach can provide a simple but effective remedy to the pseudovibrat
ion problem. (C) 1997 American Institute of Physics.