Abstract
Confocal SHG (cSHG) microscopy and interferometric SHG (iSHG) microscopy open the opportunity to study non-destructively the symmetry of surface and interface structures of materials. The motivation for building the current set-up, operated with a turn-key 1550 nm fs-fiber laser system, can be found in the need of new noninvasive methods for the investigation of metal oxides and corrosion products, as e.g. found below painted steel surfaces [1] or on hot-dip galvanized Zn coatings on steel sheets.
© 2013 IEEE
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