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Multiple rotation assessment through isothetic fringes in speckle photography

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Multiple-aperture speckle method applied to local displacement measurements.copiaautorizada.pdf (1.590Mb)
Date
2007-04-20
Author(s)
Ángel-Toro, Luciano
Tebaldi, Myrian
Bolognini, Néstor
Ángel-Toro, Luciano
Tebaldi, Myrian
Bolognini, Néstor
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Abstract
Abstract
The use of different pupils for storing each speckled image in speckle photography is employed to determine multiple in-plane rotations. The method consists of recording a four exposure specklegram where the rotations are done between exposures. This specklegram is then optically processed in a whole field approach rendering isothetic fringes, which give detailed information about the multiple rotations. It is experimentally demonstrated that the proposed arrangement permits the depiction of six isothetics in order to measure either six different angles or three nonparallel components for two local general in-plane displacements. © 2007 Optical Society of America
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URI
http://hdl.handle.net/10784/1448
Source / Editor URL
Applied Optics
http://dx.doi.org/10.1364/AO.46.002676
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