Thermal strain measurement by one-beam laser speckle interferometry
Abstract
A method of one-beam laser speckle interferometry was applied to the measurement of transient thermal strain fields in an aluminum plate heated at a small region. A ruby pulse laser minimized the effect of thermal air turbulence on speckle correlation. High quality isothetic fringe patterns were obtained. The result compares well with available existing data.
- Publication:
-
Applied Optics
- Pub Date:
- August 1980
- DOI:
- 10.1364/AO.19.002701
- Bibcode:
- 1980ApOpt..19.2701C
- Keywords:
-
- Interferometers;
- Laser Applications;
- Pulsed Lasers;
- Speckle Patterns;
- Strain Measurement;
- Stress Measurement;
- Thermal Stresses;
- Aluminum;
- Atmospheric Turbulence;
- Diffraction Patterns;
- Metal Plates;
- Ruby Lasers;
- Spatial Filtering;
- Strain Distribution;
- Transient Heating;
- Turbulence Effects;
- Instrumentation and Photography;
- STRAIN ANALYSIS;
- SPECKLE PHENOMENA;
- METROLOGY