Vibration of low amplitude imaged in amplitude and phase by sideband versus carrier correlation digital holographyReportar como inadecuado




Vibration of low amplitude imaged in amplitude and phase by sideband versus carrier correlation digital holography - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

1 LHC - Laboratoire Hubert Curien Saint Etienne 2 L2C - Laboratoire Charles Coulomb

Abstract : Sideband holography can be used to get fields images E0 and E1 of a vibrating object for both the carrier E0 and the sideband E1 frequency with respect to vibration. We propose here to record E0 and E1 sequentially, and to image the correlation E1E * 0 . We show that this correlation is insensitive the phase related to the object roughness and directly reflect the phase of the mechanical motion. The signal to noise can be improved by averaging the correlation over neighbor pixel. Experimental validation is made with vibrating cube of wood and with a clarinet reed. At 2 kHz, vibrations of amplitude down to 0.01 nm are detected.





Autor: N Verrier - L Alloul - M Gross -

Fuente: https://hal.archives-ouvertes.fr/



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