Combining holography with speckling for vibration analysis
Abstract
Time average holographic reconstruction describes a family of fringes, proportional to contours of equal height of vibration, without being able to identify directly the 'hills' and the 'valleys' of the vibrating object. Time average speckle shearing interferometric reconstruction describes another family of fringes, proportional to the contours of equal slope of vibration. Combining the two families of fringes, it is possible to define at every point of a vibrating surface the amplitude and the relative phase of the mechanical vibration.
- Publication:
-
Israel Journal of Technology
- Pub Date:
- 1980
- Bibcode:
- 1980IsJT...18..275P
- Keywords:
-
- Holographic Interferometry;
- Imaging Techniques;
- Structural Vibration;
- Vibration Measurement;
- Amplitudes;
- Diffraction Patterns;
- Piezoelectric Transducers;
- Vibration Mode;
- Instrumentation and Photography