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Closed-loop phase-shifting homodyne interferometry using heterodyne phase detection

โœ Scribed by Bitou, Youichi


Book ID
115353978
Publisher
The Optical Society
Year
2008
Tongue
English
Weight
675 KB
Volume
47
Category
Article
ISSN
1559-128X

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Phase shifting holographic interferometry is shown to be a useful tool for detection of internal defects in materials by observing strain anomalies in a stressed object. The postrecording signal processing includes smoothing of the measured deformation by means of data polynomial fitting, a derivati