2010 • Conference Paper
Optical tomography based on phase-shifting schlieren deflectometry
Authors:
Foumouo, Emmanuel,
Dewandel, Jean-Luc,
Joannes, Luc,
Beghuin, Didier,
Jacques, Laurent ,
Antoine, Philippe
Published in:
Optical Sensing and Detection
We present a new optical tomography technique based on phase-shifting schlieren deflectometry. The principle is that of computerized tomography. The three-dimensional profile is reconstructed from the deflection angles of rays passing through the tested object. We have investigated optical phantoms chosen in view of the characterization of dendritic growth in a solidification process. Promising results have been obtained with a homogeneous sphere and a bundle of 200 mu m fibers. The deviation angles exceed two degrees with a variation of the refractive index Delta n = 0.025.