title: Singular-value demodulation of phase-shifted holograms.
abstract: 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; and (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.
authors.forename: Fernando
authors.initials: F
authors.lastname: Lopes
authors.forename: Michael
authors.initials: M
authors.lastname: Atlan
mesh_terms: D006696:Holography / Q000295:instrumentation / Q000379:methods*; D007368:Interferometry; D008027:Light; D055620:Optical Phenomena