Investigation of fracture mechanisms in resin concrete using spatially multiplexed digital Fresnel holograms

Pascal Picart; Boubakar Diouf; Eric Lolive; Jean-Marie Berthelot

doi:10.1117/1.1668282

1 May 2004 Investigation of fracture mechanisms in resin concrete using spatially multiplexed digital Fresnel holograms

Pascal Picart, Boubakar Diouf, Eric Lolive, Jean-Marie Berthelot

Author Affiliations +

Optical Engineering, Vol. 43, Issue 5, (May 2004). https://doi.org/10.1117/1.1668282

Abstract

A digital twin Mach-Zehnder holographic interferometer is presented and applied to the investigation of fracture mechanisms in resin concrete submitted to a three-point flexural loading. The double interferometric setup allows spatial multiplexing for a simultaneous double sensitivity measurement. The component determination is obtained from two different illumination directions giving two sensitivity vectors. The numerical reconstruction of the object is performed following the discrete Fresnel transform. We investigate the image formation by merging analogic and discrete Fourier calculations in a smooth reference plane wave scheme. We examine the complex relation between the original object and the reconstructed one and the object localization is derived. Experimental results are presented and exploited to obtain the evolution of the crack tip propagation during the test.

©(2004) Society of Photo-Optical Instrumentation Engineers (SPIE)

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Pascal Picart, Boubakar Diouf, Eric Lolive, and Jean-Marie Berthelot "Investigation of fracture mechanisms in resin concrete using spatially multiplexed digital Fresnel holograms," Optical Engineering 43(5), (1 May 2004). https://doi.org/10.1117/1.1668282

Published: 1 May 2004

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