Co-axis digital holography based on sinusoidal phase modulation using generalized lock-in detection

Abstract : Sinusoidal phase modulating (SPM) interferometers are used to precisely measure complex light fields with simple interferometric setups. Recently, a generalized lock-in technique has been proposed for optimizing the signal extraction in phase-modulated interferometers. This article shows its applicability in digital holography as well as digital holographic interferometry. A compact homemade setup based on the Michelson interferometer was used to observe the scattering sample surface with a spatial resolution of 32 LP/mm; out-of-plane rotation was measured with a theoretical detection limit of 0.004°. The comparison between the generalized lock-in detection and traditional SPM interferometer method was done theoretically and experimentally.
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https://hal-utt.archives-ouvertes.fr/hal-02276289
Contributor : Jean-Baptiste Vu Van <>
Submitted on : Monday, September 2, 2019 - 2:44:35 PM
Last modification on : Monday, September 16, 2019 - 4:35:59 PM

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Yunlong Zhu, Julien Vaillant, Manuel François, Guillaume Montay, Aurélien Bruyant. Co-axis digital holography based on sinusoidal phase modulation using generalized lock-in detection. Applied optics, Optical Society of America, 2017, 56 (13), pp.F97. ⟨10.1364/AO.56.000F97⟩. ⟨hal-02276289⟩

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