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Acoustic MicroscopySecond Edition$
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Andrew Briggs and Oleg Kolosov

Print publication date: 2009

Print ISBN-13: 9780199232734

Published to Oxford Scholarship Online: February 2010

DOI: 10.1093/acprof:oso/9780199232734.001.0001

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Experimental elastic microanalysis

Experimental elastic microanalysis

Chapter:
(p.123) 8 Experimental elastic microanalysis
Source:
Acoustic Microscopy
Author(s):

G. A. D. Briggs

O. V. Kolosov

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780199232734.003.0008

In principle it is possible to reconstruct the reflectance function of a surface from V(z) data. This requires either that V(z) should be measured as a complex‐valued function, or that phase reconstruction techniques should be used. In practice the highest accuracy is obtained by measuring the period of oscillations in V(z), and using ray analysis. The highest accuracy is obtained from a cylindrical line‐focus‐beam lens, which also gives directionality in anisotropic surfaces. Accuracy better than one part in 104 can be obtained. Stress fields can be imaged and measured. Time‐resolved techniques, enhanced if necessary by a maximum entropy method, give quantitative measurements by separating the echoes from the top and bottom of thin layers.

Keywords:   V(z) reflectance function, phase reconstruction, line‐focus‐beam, cylindrical lens, anisotropy, accuracy, stress, time‐resolved, maximum entropy method

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