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Journal Articles Applied optics Year : 2017

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

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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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hal-02276289 , version 1 (02-09-2019)

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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, 2017, 56 (13), pp.F97. ⟨10.1364/AO.56.000F97⟩. ⟨hal-02276289⟩

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