Ref HAL: hal-00740782_v1
Ref Arxiv: 1210.3182
DOI: 10.1364/OE.20.022860
WoS: 000309522400103
Ref. & Cit.: NASA ADS
Exporter : BibTex | endNote
10 Citations
Résumé:

We propose here to combine sideband holography with stroboscopic illumination synchronized with the vibration of an object. By sweeping the optical frequency of the reference beam such a way the holographic detection is tuned on the successive sideband harmonic ranks, we are able to image the instantaneous velocities of the object. Since the stroboscopic illumination is made with an electronic device, the method is compatible with fast (up to several MHz) vibration motions. The method is demonstrated with a vibrating clarinet reed excited sinusoidally at 2 kHz, and a stroboscopic illumination with cyclic ratio 0.15. Harmonic rank up to n = ±100 are detected, and a movie of the instantaneous velocities is reported.