Bubbles, drops, and solid particles recognition from real or virtual photonic jets reconstructed by digital in-line holography

The image of the photonic jet (also called caustic) formed by a large, transparent, and spherical particle, reconstructed by digital in-line holography, is shown to be similar to the Airy pattern observed at the focus of a diffraction-limited lens. The analysis of this image, real or virtual dependi...

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Bibliographic Details
Published in:Optics letters 2018-06, Vol.43 (12), p.2945-2948
Main Authors: Sentis, Matthias P L, Onofri, Fabrice R A, Lamadie, Fabrice
Format: Article
Language:English
Subjects:
Bubbles
Composition
Diffraction patterns
Digital imaging
Holography
Image reconstruction
Nuclear Experiment
Nuclear Theory
Photonics
Physics
Refractivity
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Summary:The image of the photonic jet (also called caustic) formed by a large, transparent, and spherical particle, reconstructed by digital in-line holography, is shown to be similar to the Airy pattern observed at the focus of a diffraction-limited lens. The analysis of this image, real or virtual depending on whether the particle relative refractive index is above or below one, allows characterizing the particle composition via its refractive index. Experiments clearly demonstrate the value of this method for the simultaneous 3D characterization and differentiation of the dynamics, size, and composition of gas, liquid, and solid particles in multiphase flows.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.43.002945