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Article Dans Une Revue Applied optics Année : 2008

Digital in-line holography in thick optical systems: application to visualization in pipes

Résumé

In this paper we apply digital in-line holography to image opaque objects through a thick plano-concave pipe. Opaque fibers and opaque particles are considered}. Analytical expression of the intensity distribution in the CCD sensor plane is derived using generalized Fresnel transform. \textbf{The proposed model has the ability to deal with various pipe shape and thickness and compensates for the lack of versatility of classical DIH models. Holograms obtained with a 12 mm thick plano-concave pipe are then reconstructed using fractional Fourier transform (FRFT).} This method allows us to get rid of astigmatism. Numerical and experimental results are presented.
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Dates et versions

hal-00767626 , version 1 (20-12-2012)

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Nicolas Verrier, Sébastien Coëtmellec, Brunel Marc, Lebrun Denis. Digital in-line holography in thick optical systems: application to visualization in pipes. Applied optics, 2008, 47, pp.4147. ⟨10.1364/AO.47.004147⟩. ⟨hal-00767626⟩
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