| dc.creator | ABUNDIO DAVILA ALVAREZ | |
| dc.creator | JOSE ENRIQUE ADRIAN LANDGRAVE MANJARREZ | |
| dc.date | 2014-01 | |
| dc.date | info:eu-repo/date/embargoEnd/2019-01-30 | |
| dc.date.accessioned | 2022-10-12T19:48:30Z | |
| dc.date.available | 2022-10-12T19:48:30Z | |
| dc.identifier | http://cio.repositorioinstitucional.mx/jspui/handle/1002/695 | |
| dc.identifier.uri | https://repositorioslatinoamericanos.uchile.cl/handle/2250/4122426 | |
| dc.description | A multi-level spiral phase filter is proposed in electronic speckle pattern interferometry (ESPI) for out-ofplane displacement measurements. This filter generates a particular kind of speckle pattern that results from the convolution of standard speckles with the filter point spread function (Fourier transform). We shall refer to it as a vortex-filtered speckle pattern (VF-SP). It is shown here that if unresolved and fully developed VF-SPs are generated, then each speckle contains embedded phase terms which can be controlled by the multi-level spiral filter rotation. This mechanism effectively allows the application of standard phase extraction procedures for displacement measurements. Numerical simulations of an interferometer working with VF-SPs were done to verify this technique. Experimental validation was achieved with an out-of-plane electronic speckle pattern interferometer, in which an Liquid Crystal on
Silicon (LCoS) was used to generate the multi-level spiral phase filters. | |
| dc.format | application/pdf | |
| dc.rights | info:eu-repo/semantics/embargoedAccess | |
| dc.rights | http://creativecommons.org/licenses/by-nc-nd/4.0 | |
| dc.subject | info:eu-repo/classification/cti/1 | |
| dc.title | Displacement measurement with multi-level spiral phase filtering in speckle interferometry | |
| dc.type | info:eu-repo/semantics/article | |
