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http://cio.repositorioinstitucional.mx/jspui/handle/1002/695| Displacement measurement with multi-level spiral phase filtering in speckle interferometry | |
| ABUNDIO DAVILA ALVAREZ JOSE ENRIQUE ADRIAN LANDGRAVE MANJARREZ | |
| En Embargo | |
| 30-01-2019 | |
| Atribución-NoComercial-SinDerivadas | |
| 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. | |
| 2014-01 | |
| Artículo | |
| CIENCIAS FÍSICO MATEMÁTICAS Y CIENCIAS DE LA TIERRA | |
| Aparece en las colecciones: | Articulos Arbitrados 2014 |