Measurement of motion paths
Abstract
Several methods of measuring paths of motion of rough objects are described, all of which use speckle patterns, or speckle interferograms, which originate from interference between the scattered waves of the illuminating beam. They can easily be used for contactless motion measurements because they follow the rough object in its motion. For measurement of lateral motions, the methods discussed include speckle photography and holographic speckle photography. For measurement of depth motions, they are the oblique observation method, the degree of correlation method, and the very large depth range method. Real time measurements, include the speckle pattern correlation method and measurement of magnitude and direction of lateral motion vectors.
- Publication:
-
Speckle Metrology
- Pub Date:
- 1978
- Bibcode:
- 1978spme.book..159W
- Keywords:
-
- Displacement Measurement;
- Holographic Interferometry;
- Optical Measuring Instruments;
- Photographic Measurement;
- Speckle Patterns;
- Correlation;
- Diffraction Patterns;
- Fourier Transformation;
- Longitude;
- Real Time Operation;
- Time Dependence;
- Instrumentation and Photography