Inline mechano-vibration holography for simultaneous phase and elasticity mapping of soft samples.

ABSTRACT: Off-axis holography enables single-shot phase retrieval but reduces spatial bandwidth, while in-line phase-shifting interferometry preserves bandwidth yet requires reference-path stepping and is sensitive to drift, limiting dynamic measurements. Moreover, viscoelastic mapping is rarely available from the same holographic measurement. We propose vibration-encoded in-line Mach-Zehnder holography for simultaneous thickness and viscoelasticity mapping of soft samples. Twelve holograms acquired over one vibration cycle are analyzed using Bessel-based harmonic inversion and robust regression to recover the static phase, modulation depth, and phase lag, yielding thickness and Kelvin-Voigt storage and loss modulus maps (E', E″). Simulations recover E' and E'' to within

SUBMITTER: Abdioglu HB 

PROVIDER: S-EPMC12904524 | biostudies-literature | 2026 Feb

REPOSITORIES: biostudies-literature