Object Detection in Solid Phantoms by Speckle Contrast Measurement

Authors: Di Rocco, H.O.; Iriarte, D.; Pomarico, J.A.; Ranea-Sandoval, H.F.

Source: Journal of Holography and Speckle, Volume 2, Number 2, December 2005 , pp. 90-95(6)

Publisher: American Scientific Publishers

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Abstract:

The detection of cylindrical cavities with diameters of the order of 2 mm, filled with several fluids, carved in solid phantoms made of parallelepipeds of different polymers, is presented. The detection method is based on the scanning of one of the faces of the phantom by a red-emitting small diameter laser beam, and the analysis of the transmittance speckle pattern at the opposite face. The contrast of the speckle, defined as the standard deviation of the histogram of its image, normalized by the mean intensity detected, is used as a tool to determine the absolute position and relative position of such irregularities.

Keywords: SPECKLE; TURBID MEDIA; BIOLOGICAL APPLICATIONS; POLYMERS

Document Type: Research article

DOI: http://dx.doi.org/10.1166/jhs.2005.016

Publication date: 2005-12-01

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The growing interest and activity in the fields of holography and speckle require a forum for rapid dissemination of important results. Journal of Holography and Speckle (JOHAS) is that international forum which offers scientists and engineers timely, peer-reviewed research in these fields. Journal of Holography and Speckle publishes original rapid communications, full research papers and timely state-of-the-art reviews (with author's biography and photo) encompassing the fundamental and applied research in all areas of holography, and speckle.
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