This paper describes a method of digital speckle photography that can be used to study the mechanisms by which powerful radiation from pulsed CO2 and Nd:YAG lasers acts on various materials. Rough-surfaced plates made from aluminum oxide and steel were used as experimental samples. The results of the experiments are presented in the form of three-dimensional graphs that clearly display the characteristics and dynamics of the processes being studied. © 2004 Optical Society of America

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