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Proceedings Paper

Two-wavelength phase shift interferometry to characterize ballistic features
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Paper Abstract

We apply two-wavelength phase shifting interferometry to generate 3D surface profile maps of spent bullet cartridge cases. From the captured interferograms, an optimized algorithm was used to calculate a phase profile from which a precise digital surface map of the cartridge casing may be produced. This 3D surface profile is used to enhance a firearms examiner's ability to uniquely identify distinct features or toolmarks imprinted on the casing when the weapon is fired. These features play a key role in the matching process of ballistic forensic examination.

Paper Details

Date Published: 1 May 2014
PDF: 7 pages
Proc. SPIE 9131, Optical Modelling and Design III, 91311K (1 May 2014); doi: 10.1117/12.2051859
Show Author Affiliations
Glenn W. Pagano, Northern Arizona Univ. (United States)
Christopher J. Mann, Northern Arizona Univ. (United States)


Published in SPIE Proceedings Vol. 9131:
Optical Modelling and Design III
Frank Wyrowski; John T. Sheridan; Jani Tervo; Youri Meuret, Editor(s)

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