Rapid visualization of displacement fields with the method of electronic speckle interferometry
The ESPI method produces an intereference picture without a need to reconstruct wavefronts, by means of simple subtraction by pixel of two registered digital holograms.
1. Static loading in the center of a plate with three-point bearing
|Digital hologram||Correlational speckle interferogram|
2. Oscillations of a disk fixed in the center, on a resonance frequency of 128 Hz
|Digital hologram||Correlation speckle interferogram|