Open AccessPhase estimation from digital holograms without unwrapping
Author(s) -
Ignacio Iglesias
Publication year - 2014
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.22.021340
Subject(s) - holography , digital holography , optics , phase unwrapping , phase (matter) , computer science , process (computing) , noise (video) , holographic interferometry , field (mathematics) , digital holographic microscopy , computer vision , interferometry , physics , image (mathematics) , mathematics , quantum mechanics , pure mathematics , operating system
Digital holography is a convenient method for determining the phase induced by transparent objects. When the phase change is higher than 2π, an unwrapping algorithm is needed to provide a useful phase map. In the presence of noise, this process is not trivial and not fully resolved. In this paper a procedure is proposed to circumvent the need for unwrapping by estimating the phase from its gradient, which is directly computed from the reconstructed field. Application of the method to digital holograms of microscopic samples is demonstrated.