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

Yunlong Zhu (1) , Julien Vaillant (1, 2) , Manuel François (2) , Guillaume Montay (2) , Aurélien Bruyant (1)

1 LNIO - Laboratoire de Nanotechnologie et d'Instrumentation Optique
2 LASMIS - Laboratoire des Systèmes Mécaniques et d'Ingénierie Simultanée

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.

Domains: Computer Science [cs]; Modeling and Simulation

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⟩