Singular-value demodulation of phase-shifted holograms

Fernando Lopes (1) , Michael Atlan (2)

1 IPGP - Institut de Physique du Globe de Paris
2 IL - Institut Langevin - Ondes et Images (UMR7587)

We report on phase-shifted holographic interferogram demodulation by singular value decomposition. Numerical processing of optically-acquired interferograms over several modulation periods was performed in two steps : 1- rendering of off-axis complex-valued holograms by Fresnel transformation of the interferograms; 2- eigenvalue spectrum assessment of the lag-covariance matrix of hologram pixels. Experimental results in low-light recording conditions were compared with demodulation by Fourier analysis, in the presence of random phase drifts.

Domaines: Optique [physics.optics]

Fernando Lopes, Michael Atlan. Singular-value demodulation of phase-shifted holograms. Optics Letters, 2015, 40, pp.2541 - 2541. ⟨10.1364/OL.40.002541⟩. ⟨hal-01386365⟩