Enhancement of wire diameter measurements: comparison between Fraunhofer diffraction and Lorenz‐Mie theory

Reconstruction of the three mechanical material constants of a lossy fluid-like cylinder from low-frequency scattered acoustic fields

“…The far-field data was simulated using (14) in which the lower and upper limits of the series were replaced by -5 and +5 respectively and use was also made of (30). The other parameters involved in the production of this data were: ρ 0 = 1000 kg/m …”

“…In case the characteristic dimension of the body (here the radius a) is not known a priori, it can be determined from high-frequency probe radiation using the asymptotic technique described in [12], [14] [15].…”

Out-of-plane light-scattering polarimetric imaging of a thread surface

“…The traditional optical method is the use of the optical Fourier transform for the diffraction pattern of a screw [1]. A number of modified diffraction methods were developed for increasing the accuracy of measurement [2,3], but the diffraction methods are more suitable for measuring diameter of cylinder. Laser beam interferometers have been applied to measure surface profiles of shapes such as cylinder diameters, gear tooth flanks, and thread gauge [4][5][6][7].…”

Inverse analysis of light scattered at a small angle for characterization of a transparent dielectric fiber

“…Laser diffraction technique has been extensively studied and adopted for characterization of single, strongly absorbing particles such as a metallic wire [2] as well as multiphase/polydisperse systems [3]. The generic benefits of the technique include a relatively simple optical setup with Fourier or reverse Fourier optics, the intensity of scattering diagrams is strong and, thus, easily measurable, the feedback is nearly instant, and the mathematical model of scattering may be based on the Huygens-Fresnel principle, which does not require knowledge of the optical properties of the sample.…”