Experimental Mechanics

, Volume 52, Issue 9, pp 1275–1286

Comparison between Digital Fresnel Holography and Digital Image-Plane Holography: The Role of the Imaging Aperture



Optical techniques are now broadly used in the field of experimental mechanics. The main advantages are they are non intrusive and no contact. Moreover optical techniques lead to full spatial resolution displacement maps enabling the computing of mechanical value also in high spatial resolution. For mesoscopic measurements, digital image correlation can be used. Digital holographic interferometry is well suited for quantitative measurement of very small displacement maps on the microscopic scale. This paper presents a detailed analysis so as to compare digital Fresnel holography and digital image-plane holography. The analysis is based on both theoretical and experimental analysis. Particularly, a theoretical analysis of the influence of the aperture and lens in the case of image-plane holography is proposed. Optimal filtering and image recovering conditions are thus established. Experimental results show the appropriateness of the theoretical analysis.


Digital holography Phase measurement Displacement measurement Deformation measurement Imaging aperture 

Copyright information

© Society for Experimental Mechanics 2012

Authors and Affiliations

  1. 1.LAUM CNRSUniversité du MaineLE MANS Cedex 9France
  2. 2.Ecole des Mines d’AlèsALESFrance
  3. 3.ENSIM, École Nationale Supérieure d’Ingénieurs du MansLE MANS Cedex 9France

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