Köhler, BerndBerndKöhlerAmano, YuuiYuuiAmanoSchubert, FrankFrankSchubertNakahata, KazuyukiKazuyukiNakahata2024-09-022024-09-022024-10-01https://publica.fraunhofer.de/handle/publica/47434210.1016/j.ndteint.2024.1032042-s2.0-85201757441The often-assumed measurement reciprocity between scanning laser detection and scanning laser excitation is disproved by a simple experiment. Nevertheless, a deeper study based on the reciprocity relation reveals correct reciprocal measurement set-ups for both the probe-excitation/laser-detection and the laser-excitation/probe-detection case. Similarly, the all-laser measurement, that is thermoelastic laser excitation with laser vibrometer detection, is not in general reciprocal with respect to the exchange of excitation and detection positions. Again, a substitute for the laser doppler vibrometer out-of-plane displacement measurement was found which ensures measurement reciprocity together with laser excitation. The apparent confusion in literature about strict validity/non-validity of measurement reciprocity is mitigated by classifying the measurement situations systematically.enopen accessEFITLaser Doppler vibrometry (LDV)Laser ultrasoundReciprocitySimulationjournal article