Theoretical Model For The Image Formed By A Spherical Particle In A Coherent Imaging System: Comparison To Experiment

Robust genetic algorithm for high-accuracy particle position estimation in three-dimensional particle image velocimetry applications

“…Previous works employing a more detailed treatment 4,7 have shown that the scattered intensity field produced by micronsized particles is not symmetric about the focus plane. Therefore, there can be no ambiguity of particle position for particles on either side of the focus plane.…”

Effects of Ammonia Plasma Treatment on the Electrical Properties of Plasma-Enhanced Chemical Vapor Deposition Amorphous Hydrogenated Silicon Carbide Films

“…The imaging system under consideration has been described in detail in previous work by other authors [19,20] and is summarized in figure 1. This system was used as a starting point to validate the theoretical model and experimental results †.…”

“…An experimental 18 µm glass sample image is quantitatively compared with the calculated image for a Gaussian wavefront in forward scattering. This sample image in this viewing configuration has been chosen and described by a number of other authors [19][20][21][22][23] and therefore was chosen as the sample case for the present work.…”

3D particle positioning by using the Fraunhofer criterion

“…Single particle detection is a valuable tool in different subjects, such as colloidal sciences [9]. Some of these methods rely on intensity measurements from an experimental particle image to be compared against numerical calculations, where the particle light scattering is modeled using the classical the Near Field Lorenz-Mie Theory (NFLMT) or the Generalized Lorenz-Mie Theory (GLMT) [9,[11][12][13][14][15]. However, light brightness non-uniformities are present in experimental particle images and make the defocus particle extraction difficult.…”

“…Nowadays optical techniques for 3D particle positioning include scanning techniques [1], stereoscopic imaging [2], holographic methods [3][4][5][6][7][8][9][10] and quantitative defocusing methods [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30]. These methods can be applied for the analysis of macro-or micro-fluids applications depending on the experimental arrangement utilized to fulfill such purpose.…”