Differential amplitude contrast in acoustic microscopy

Nikoonahad, M.
November 1987
Applied Physics Letters;11/23/1987, Vol. 51 Issue 21, p1687
Academic Journal
A differential amplitude contrast scanning acoustic microscope is described. The operation of this system resides on a two-beam acoustic lens which produces two adjacent spots at its focal plane. The signals received from these two foci are first amplitude demodulated and then electronically subtracted from each other, resulting in a differential amplitude imaging signal. Experiments at 10 MHz are described and illustrated by a number of images.


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