Bernd Rudolf Arminger, Bernhard Zagar,
"Processing of Interference Fringe Patterns to obtain highly localized Strain"
: International Workshop on Imaging Systems and Techniques, 2006
Processing of Interference Fringe Patterns to obtain highly localized Strain
Sprache des Titels:
International Workshop on Imaging Systems and Techniques
Mechanical strain and displacement measurements are
important in general material testing. Especially non-contacting
methods like optical measurement are needed to analyze the
behaviour of micro materials since no other standard method is
otherwise available. In this paper a measurement method is
introduced that fulfills these requirements. The device under test has
to be prepared only with two Vickers micro hardness indentations.
These two markers are illuminated by a collimated laser beam. The
mechanical strain or displacement can be measured by scanning the
diffracted light field using two CCD line scan cameras. The
measurement system is able to resolve displacement of these
indentations in the nm range.