Optical Techniques for Surface Characterization.
Final rept. 15 Oct 75-14 Jul 76,
MEMPHIS STATE UNIV TENN DEPT OF ELECTRICAL ENGINEERING
Pagination or Media Count:
The available statistical analyses of laser speckle from smooth surfaces have been extended to account for the effect of anisotropic surfaces on the contrast and on the autocorrelation function. Experimental results are presented for comparison with the theoretical results. For rough surfaces, an experiment is proposed for remotely determining surface roughness by using two different illuminating angles. A significant aspect of the procedure is that photographic processing has been removed from the experiment so that the technique is of interest in radar applications. An extensive literature survey of methods for measuring correlation length is reported. The various techniques are classified into three categories, profilometric, optical, and photomicrographic. The most promising procedures are discussed and two techniques are recommended for laser radar research. Author
- Lasers and Masers
- Optical Detection and Detectors