Low-coherence interferometric systems provide three-dimensional imaging through scattering media by measurement of the object's temporal response. An optical correlator is presented that allows direct recording of the signal issued from the object under reflection. The filtering technique enhances the image visibility and allows one to obtain an image with a good signal-to-noise ratio. The performance of two particular imaging systems, point-to-point and vertical-slice imaging, is discussed with an object comprising two cover plates that are attached.
Laboratoire Traitement du Signal et Instrumentation, Unité Mixte de Recherche, Centre National de la Recherche Scientifique, Batiment F, 10 Rue Barrouin, 42000 Saint Etienne, France.
