Author
Pietro Ferraro
Other affiliations: Aeritalia, Centre national de la recherche scientifique, Olivetti ...read more
Bio: Pietro Ferraro is an academic researcher from National Research Council. The author has contributed to research in topics: Digital holography & Holography. The author has an hindex of 61, co-authored 653 publications receiving 12666 citations. Previous affiliations of Pietro Ferraro include Aeritalia & Centre national de la recherche scientifique.
Papers published on a yearly basis
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22 Jun 2015
TL;DR: In this article, surface relief gratings (SRGs) were realized with Lloyd's mirror system and optical characterization of the material was performed, starting from a commercial one and using a new way to analyse SRGs by means of Digital Holography Microscopy, to determine relevant parameters for the realization of the patterns with different shape and size.
Abstract: Azopolymer materials belong to family special materials, which are subject to photo-isomerization when illuminated by appropriate light wavelength. Optical characterization of azopolymer materials is interesting because they can be patterned when illuminated by coherent polarized light with potentially interesting applications in the biotechnology, photonic elements, molding templates, etch masks and micro-nanochannels. The interference lithography is an excellent tool to trigger the isomerization reaction on the material. During this work, switchable patterns were fabricated by means of a well established holographic set-up: surface relief gratings (SRGs) were realized with Lloyd’s mirror system. Moreover, optical characterization of the material was performed, starting from a commercial one and using a new way to analyse SRGs by means of Digital Holography Microscopy, to determine relevant parameters for the realization of the patterns with different shape and size. Some preliminary results of the influence of such patterns on the cell behavior were shown.
TL;DR: In this article , the authors present a feature issue to follow the conclusion of the Optica Topical Meeting on Digital Holography and 3D Imaging (DH+3D).
Abstract: This feature issue is a continuation of a tradition to follow the conclusion of the Optica Topical Meeting on Digital Holography and 3D Imaging (DH+3D). It addresses current research topics in digital holography and 3D imaging that are also in line with the topics of Applied Optics and Journal of the Optical Society of America A.
16 Mar 2023
TL;DR: In this article , the authors used holographic tomography (HT) to detect exogenous nanographene oxide particles and endogenous lipid droplets in flow-cytometry (FC) modality.
Abstract: Detection and quantification of intracellular structures is fundamental in biomedical sciences. New emerging inspection tools based on holographic microscopy and quantitative phase imaging can give answers to such critical demands. Holographic tomography (HT) systems are the best candidates for this challenge. Recently, HT has been demonstrated working in flow-cytometry (FC) modality. Results show that the novel HTFC tool is capable to furnish 3D visualization and quantifications of the different intracellular particles. In particular, here we report that exogenous nanographene oxide particles as well as endogenous lipid droplets can be detected, measured, and visualized in each flowing cell by label-free HTFC. This method opens the way for accurate and high-throughput measurements at the 3D single-cell level for different applications such as diagnosis of diseases, development of drug delivery applications, and examination of cell functionalities. Experiments and processing methods will be described, and several examples will be discussed.
01 Jun 2017
TL;DR: A computational-based approach in tomographic flow cytometry by digital holography to characterize self-rolling cells in microfluidic channels is investigated, by employing red blood cells and diatoms.
Abstract: We investigate a computational-based approach in tomographic flow cytometry by digital holography to characterize self-rolling cells in microfluidic channels. Different experimental validations, by employing red blood cells (RBCs) and diatoms, are made.
21 Apr 2013
TL;DR: In this paper, a new strategy of 3D tracking of living cells by digital holography microscopy based on the morphological changes of cells during the migration is proposed, and a comparison with other 3D-tracking methods is accomplished.
Abstract: We propose a new strategy of three-dimensional (3D) tracking of living cells by digital holography microscopy based on the morphological changes of cells during the migration. A comparison with other 3D tracking methods is accomplished.
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Journal Article•
28,685 citations
Journal Article•
TL;DR: In this article, a fast Fourier transform method of topography and interferometry is proposed to discriminate between elevation and depression of the object or wave-front form, which has not been possible by the fringe-contour generation techniques.
Abstract: A fast-Fourier-transform method of topography and interferometry is proposed. By computer processing of a noncontour type of fringe pattern, automatic discrimination is achieved between elevation and depression of the object or wave-front form, which has not been possible by the fringe-contour-generation techniques. The method has advantages over moire topography and conventional fringe-contour interferometry in both accuracy and sensitivity. Unlike fringe-scanning techniques, the method is easy to apply because it uses no moving components.
3,742 citations
TL;DR: In this paper, the authors review the recent developments in the area of optical fiber grating sensors, including quasi-distributed strain sensing using Bragg gratings, systems based on chirped gratings and intragrating sensing concepts.
Abstract: We review the recent developments in the area of optical fiber grating sensors, including quasi-distributed strain sensing using Bragg gratings, systems based on chirped gratings, intragrating sensing concepts, long period-based grating sensors, fiber grating laser-based systems, and interferometric sensor systems based on grating reflectors.
3,665 citations