Accurate 3D tracking and size measurement of evaporating droplets using in-line digital holography and "inverse problems" reconstruction approach

作     者：Seifi, Mozhdeh Fournier, Corinne Grosjean, Nathalie Mees, Loic Marie, Jean-Louis Denis, Loic 

作者机构：Univ Lyon F-42023 St Etienne France Univ St Etienne Telecom St Etienne Lab Hubert Curien CNRSUMR5516 F-42000 St Etienne France Univ Lyon 1 INSA Lyon CNRS Lab Mecan Fluides & AcoustUMR5509Ecole Cent Lyo F-69134 Ecully France 

出 版 物：《OPTICS EXPRESS》 (Opt. Express)

年 卷 期：2013年第21卷第23期

页      面：27964-27980页

核心收录：

学科分类：070207[理学-光学] 07[理学] 08[工学] 0803[工学-光学工程] 0702[理学-物理学] 

基　　金：MORIN project (3D Optical Measurements for Research and INdustry) french government through the"Agence Nationale de la Recherche" (ANR) Programme Avenir Lyon-Saint-Etienne (PAL-SE) 

主　　题：Digital holographic imaging Image processing algorithms Inverse problems Ptychography Reconstruction algorithms Three dimensional imaging 

摘      要：Digital in-line holography was used to study a fast dynamic 3D phenomenon: the evaporation of free-falling diethyl ether droplets. We describe an unsupervised reconstruction algorithm based on an inverse problems approach previously developed by our team to accurately reconstruct 3D trajectories and to estimate the droplets size in a field of view of 7 x 11 x 20 mm(3). A first experiment with non-evaporating droplets established that the radius estimates were accurate to better than 0.1 mu m. With evaporating droplets, the vapor around the droplet distorts the diffraction patterns in the holograms. We showed that areas with the strongest distortions can be discarded using an exclusion mask. We achieved radius estimates better than 0.5 mu m accuracy for evaporating droplets. Our estimates of the evaporation rate fell within the range predicted by theoretical models. (C) 2013 Optical Society of America