Particle positioning from CCD images: experiments and comparison with the generalized Lorenz-Mie theory

Abstract

This paper describes the experimental imaging of a spherical particle diffraction pattern obtained in back, forward and side scattering configurations, using illumination from three different beam shapes. The experimental problems encountered for each of the viewing configurations and the theoretical analysis of the diffraction pattern of the particle on its image plane using the generalized Lorenz-Mie theory are discussed. The images obtained are quantitatively compared with calculated results and implications for particle position estimation are discussed.

Particle imaging techniques for volumetric three-component (3D3C) velocity measurements in microfluidics

“…Only the lower part of the profile could be measured. Guerrero et al (2000) extended the method to backward and side scatter configurations and compared experimental results with Lorentz-Mie theory. In a later study (Guerrero-Viramontes et al 2006) the method was extended, also including Huygens-Fresnel light propagation.…”

Non-spherical seeding 3D positioning from CCD images using Lorenz–Mie theory

“…The experimental set-up and results compared to the calculations obtained from our GLMT code are fully described in [5]. For model verification purposes, a number of calculations were made, which were found to be in close agreement with other experimental/computational results.…”

“…The experimental set-up devised allows recording of forward scattering, as in [5]. Figure 1 shows the typical forwardscattering configuration.…”

“…Recently, a new velocimetry method of 3D particle positioning from seeding particle images using generalized Lorenz-Mie theory has been reported [5][6][7]. This velocimetry method is applicable to the positioning of spherical seeding particles, illuminating the said seeding in backward or forward scattering mode.…”

Elaboração e caracterização de leite de búfala fermentado com abacaxi em calda

“…Já a formulação Padrão com 100% leite de vaca obteve média das notas acima de 2 (2,68±0,1 onde p<0,05 comparada às demais formulações) mostrando que as notas atribuídas a ela variaram entre 2 (provavelmente compraria) e 3 (talvez compraria/talvez não compraria). Segundo Guerrero et al (2000), a intenção de compra é um processo decisivo que leva em consideração vários fatores, como o preço, a conveniência e o marketing do produto, porém as características sensoriais são determinantes na decisão de compra. Assim, tais resultados conduzem aos fatores associados aos aspectos sensoriais do leite de búfala já citados e discutidos anteriormente.…”