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Vibration retrieval from time sequences of digital on-line Fresnel holograms

Laure Lagny 1 Carlos Trujillo 1, 2 Julien Le Meur 3 Silvio Montrésor 1 Jorge Garcia-Sucerquia 2 Kevin Heggarty 3 Charles Pezerat 1, 4 Pascal Picart 1, 4
1 LAUM - Laboratoire d'Acoustique de l'Université du Mans
2 Universidad Nacional de Colombia Sede Medellín
3 IMT Atlantique - OPT - Département Optique
4 ENSIM - Ecole Nationale Supérieure d'Ingénieurs du Mans
Abstract : This paper proposes an on-line configuration for full-field vibration retrieval at high frame rate. The spatial bandwidth of the recording is optimized by imposing the distance of the Shannon condition at the considered frame rate of the sensor. A negative zoom is designed to adapt the correct optical magnification to fulfill the recording requirements. The illumination of the object is made efficient by the use of a diffractive optical element which provides a concentrated large light spot at the surface of the object. Experimental results demonstrate the suitability of the proposed approach by providing vibration retrieval at 100kHz frame rate.
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Conference papers
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https://hal-imt-atlantique.archives-ouvertes.fr/hal-01974321
Contributor : Julien Le Meur Connect in order to contact the contributor
Submitted on : Tuesday, January 8, 2019 - 4:55:57 PM
Last modification on : Wednesday, July 21, 2021 - 7:40:02 AM

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IMT-ATLANTIQUE | CNRS | UNIV-LEMANS | INSTITUT-TELECOM | LAUM

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Laure Lagny, Carlos Trujillo, Julien Le Meur, Silvio Montrésor, Jorge Garcia-Sucerquia, et al.. Vibration retrieval from time sequences of digital on-line Fresnel holograms. Imaging and Applied Optics 2018 (3D, AO, AIO, COSI, DH, IS, LACSEA, LS&C, MATH, pcAOP), Jun 2018, Orlando, United States. ⟨10.1364/DH.2018.DM5F.2⟩. ⟨hal-01974321⟩

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