Imaging of a vibrating object by Sideband Digital Holography

Fadwa Joud (1) , Franck Laloë (1) , Michael Atlan (2) , Jean Hare (1) , Michel Gross (1)

1 LKB (Lhomond) - Laboratoire Kastler Brossel
2 IJM (UMR_7592) - Institut Jacques Monod

We obtain quantitative measurements of the oscillation amplitude of vibrating objects by using sideband digital holography. The frequency sidebands on the light scattered by the object, shifted by n times the vibration frequency, are selectively detected by heterodyne holography, and images of the object are calculated for different orders n. Orders up to n=120 have been observed, allowing the measurement of amplitudes of oscillation that are significantly larger than the optical wavelength. Using the positions of the zeros of intensity for each value of n, we reconstruct the shape of vibration the object.

Mots clés: holography; heterodyne; backscattering; acoustics; sidebands

Domaines: Optique [physics.optics]

Fadwa Joud, Franck Laloë, Michael Atlan, Jean Hare, Michel Gross. Imaging of a vibrating object by Sideband Digital Holography. Optics Express, 2009, 17 (4), pp.2774-2779. ⟨10.1364/OE.17.002774⟩. ⟨hal-00321050v3⟩