Results 61 to 70 of about 66,156 (175)
Measuring micro-displacements of specular surfaces using speckle interferometry [PDF]
arXiv, 2018 The displacement field of an object surface can be measured by using speckle interferometry. This technique is based on the phenomenon of laser speckle and consists in correlating speckle interferograms taken after and before the deformation of the surface.
arxiv
Improving Dynamic Range of Speckle Correlation based Optical Lever by spatial multiplexing [PDF]
arXiv, 2019 Speckle correlation based optical levers SC OptLev possess attractive characteristics suitable for sensing small changes in the angular orientations of surfaces. In this study, we propose and demonstrate a spatial multiplexing technique for improving the dynamic range of SC OptLev.
arxiv
New Journal of Physics, 2019 We provide a detailed analysis of the three-dimensional cross correlation properties of speckle patterns in the deep Fresnel region scattered by random surface.
Chunxiang Liu +7 more
doaj +1 more source
Scattering of Poincare beams: polarization speckles [PDF]
arXiv, 2017 Polarization speckle is a fine granular light pattern having spatially varying random polarization profile. We generate these speckle patterns by using the scattering of Poincar\'e beams, a special class of vector vortex beams, through a ground glass plate.
arxiv
Design parameters effect to magnetic flux distribution of the reluctance actuator [PDF]
FME Transactions, 2020 The paper presents an analysis of reluctance actuator for speckle reducing in laser based projectors, head-up displays, metrology and 3D scanning units to improve the quality of the generated images by a moving diffuser.
Popović Aleksandar +3 more
doaj
Fast GPU-Based Enhanced Wiener Filter for Despeckling SAR Data
Remote Sensing, 2019 Speckle noise is presented as an inherent dilemma that affects the image processing field, and in particular synthetic aperture radar images. In order to mitigate the adverse effects caused by this phenomenon, several approaches have been introduced in ...
Bilel Kanoun +3 more
doaj +1 more source
Does the structure of light influence the speckle size? [PDF]
arXiv, 2019 It is well known that when a laser is reflected from a rough surface or transmitted through a diffusive medium, a speckle pattern will be formed at a given observation plane. Speckle is commonly produced by laser beams with a homogeneous intensity, for which, well-known relations have been derived, relating the speckle size to the area of illumination.
arxiv
A study of the use of laser speckle to measure small tilts of optically rough surfaces accurately [PDF]
, 1972 Hans J. Tiziani
openalex +1 more source
Application of Speckling for In-plane Vibration Analysis [PDF]
, 1971 Hans J. Tiziani
openalex +1 more source