Topography measurements for correlations of standard cartridge cases

T. V. Vorburger; J. Song; W. Chu; T. B. Renegar; A. Zheng; J. Yen; R. M. Thompson; R. Silver; B. Bachrach; M. Ols

doi:10.1117/12.859918

10 June 2010 Topography measurements for correlations of standard cartridge cases

T. V. Vorburger, J. Song, W. Chu, T. B. Renegar, A. Zheng, J. Yen, R. M. Thompson, R. Silver, B. Bachrach, M. Ols

Proceedings Volume 7729, Scanning Microscopy 2010; 77291D (2010) https://doi.org/10.1117/12.859918
Event: Scanning Microscopy 2010, 2010, Monterey, California, United States

Abstract

The National Institute of Standards and Technology Standard Reference Materials (SRM) 2460 Standard Bullets and 2461 Standard Cartridge Cases are intended for use as check standards for crime laboratories to help verify that their computerized optical imaging equipment for ballistics image acquisitions and correlations is operating properly. Using topography measurements and cross-correlation methods, our earlier results for the SRM bullets and recent results for the SRM cartridge cases both demonstrate that the individual units of the SRMs are highly reproducible. Currently, we are developing procedures for topographic imaging of the firing pin impressions, breech face impressions, and ejector marks of the standard cartridge cases. The initial results lead us to conclude that all three areas can be measured accurately and routinely using confocal techniques. We are also nearing conclusion of a project with crime lab experts to test sets of both SRM cartridge cases and SRM bullets using the automated commercial systems of the National Integrated Ballistics Information Network.

Citation Download Citation

T. V. Vorburger, J. Song, W. Chu, T. B. Renegar, A. Zheng, J. Yen, R. M. Thompson, R. Silver, B. Bachrach, and M. Ols "Topography measurements for correlations of standard cartridge cases", Proc. SPIE 7729, Scanning Microscopy 2010, 77291D (10 June 2010); https://doi.org/10.1117/12.859918

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