Abstract
The feasibility of two-beam speckle interferometry for the study of time-varying mechanical deformation of diffusely reflecting bodies is demonstrated. A sequence of speckle patterns produced by a vibrating cantilever beam was recorded photographically by means of a high-speed camera. These speckle photographs were subsequently digitized using a CCD camera for input into an image processing computer. By gray-level subtraction of carefully registered pairs of speckle images, fringes corresponding to the relative surface displacements were obtained. A sequence of these fringe patterns was reconstructed to obtain the time-history of deformation. These are compared with time-frozen (strobed) patterns for the same body.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 620-627 |
| Number of pages | 8 |
| Journal | Proceedings of SPIE - The International Society for Optical Engineering |
| Volume | 1554 |
| DOIs | |
| State | Published - Dec 1 1991 |
| Externally published | Yes |
| Event | 2nd International Conference on Photomechanics and Speckle Metrology 1991 - San Diego, United States Duration: Jul 21 1991 → … |
Funding
This work has been supported by the U.S. Army Research Office under Contract No. DAAL-03-86-K-0169 with the University of California, San Diego. This work has been supported by the U.S. Army Research Office under Contract No. DAAL-03-
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering