Dynamic Speckle Bandwidth and Characterization of Vibration Frequency andAmplitude using a CO2 Laser Vibrometer

摘要

The speckle bandwidth in a CO2 laser radar return is measured by applying a tiltmotion to a diffuse target which is also driven with a piston motion by a loudspeaker. The speckle bandwidtb vs. tilt frequency is reported. The frequency and amplitude characteristics of a glint target undergoing piston motion only will be described.