Work

One-dimensional optical compression and backpropagation of particle digital in-line holograms

Year: 2025

Type: article

Abstract: The camera sensor fill rate (SFR) is a key factor limiting the number of particles analyzed by digital in-line holography (DIH). This study proposes the use of cylindrical lenses to reduce hologram imprint and interference on the sensor, significantly lowering the SFR without changing the observed field dimensions. Experimental results on sprayed and levitated droplets, as well as simulations using Rayleigh-Sommerfeld integrals and ABCD analysis, confirm this approach. However, using a backpropagation method to reconstruct the particle field, the primary benefit of this compression method is the reduction of the twin-particle problem. The authors believe that this optical method could further improve the performance of inverse and parametric methods by minimizing interference between the holograms.

Source: Applied Optics

DOI: 10.1364/ao.578014

Authors: Paul Bresson, Fabrice Lamadie, Lilian Chabrol, Fabrice R. A. Onofri

Institutions: Université de Montpellier, Centre National de la Recherche Scientifique, Aix-Marseille Université, Institut Universitaire des Systèmes Thermiques Industriels

Language: English

Topic: Digital Holography and Microscopy

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: Bpifrance, Agence Nationale de la Recherche

Awards: Advanced Three-dimensional Imaging of Complex particulate Systems, G7095268251