Phase analysis for focus plane detection in digital inline holography: application to three-dimensional locations of drops and threads in a beads-on-a-string structure - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Applied optics Année : 2023

Phase analysis for focus plane detection in digital inline holography: application to three-dimensional locations of drops and threads in a beads-on-a-string structure

Résumé

Three-dimensional (3D) phase maps are used in a digital inline holography system to measure the coordinates of tiny particles. The phase signature, previously applied to spherical particles by Yang et al . [ Opt. Lett. 31 , 1399 ( 2006 ) OPLEDP 0146-9592 10.1364/OL.31.001399 ], is extended here to the case of an infinite cylindrical filament to determine the optimal focus plane. The practical implementation of this method is described. Simulations show that this technique provides a very efficient tool to examine the 3D coordinates of micrometric objects. A practical application is given with the investigation of the dynamics of beads-on-a-string structures under an air flow current. These structures, obtained by stretching a viscoelastic fluid element, are of particular interest in this study, since they are characterized by several quasi-spherical beads (i.e., drops) linked by a quasi-cylindrical filament (i.e., thread).
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hal-04192712 , version 1 (31-08-2023)

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Robin Noury, Marie-Charlotte Renoult, Gilles Godard, Denis Lebrun. Phase analysis for focus plane detection in digital inline holography: application to three-dimensional locations of drops and threads in a beads-on-a-string structure. Applied optics, 2023, 62 (23), pp.6241. ⟨10.1364/AO.494647⟩. ⟨hal-04192712⟩
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