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Updated: May 17, 2026

Compact Lens-less Digital Holographic Microscope for MEMS Inspection and Characterization
Published on: July 5, 2016
Clear coherent imaging in turbid microfluidics by multiple holographic acquisitions
Vittorio Bianco1, Melania Paturzo, Andrea Finizio
1CNR—National Institute of Optics, Via Campi Flegrei, 34, Pozzuoli (NA) I-80078, Italy. vittorio.bianco@ino.it
Abstract:
Recently it has been demonstrated that digital holography is a powerful means allowing imaging of both amplitude and phase objects in turbid flowing media. However, in quasi-static turbid microfluidics, multiple scattering contributions through the colloids superimpose coherently to the recording device, resulting in speckle noise and hindering a clear vision of the objects. In this Letter we exploit the Brownian motion of the colloidal particles to get multiple uncorrelated holograms, and we combine them to reduce the speckle contrast. In this way we get a multi-look gain without losing image resolution.
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