| Author(s): |
Jun-Feng Song; Theodore V. Vorburger; Thomas B. Renegar; Xiaoyu A. Zheng; Hyug-Gyo Rhee; John M. Libert; Li Ma; K Bogart; Susan M. Ballou; B Bachrach; |
| Title: |
Correlation of Topography Measurements of NIST SRM 2460 Standard Bullets by Four Techniques |
| Published: |
January 01, 2006 |
| Abstract: |
Three optical instruments including an interferometric microscope, a Nipkow disk confocal microscope and a laser scanning confocal microscope are used for the measurements of bullet profile signatures of a National Institute of Standards and Technology (NIST) Standard Reference Material (SRM) 2460 standard bullet. The 2D profile signatures are compared with the virtual bullet standard signature established by a stylus-based measurement system at NIST. The bullet signature differences are quantified by the maximum cross-correlation function CCFmax. If the compared signatures were exactly the same, CCFmax would be 100%. Comparison results show close agreement among the four techniques for bullet profile signature measurements. The average CCFmax values are higher than 90%. This supports the possibility of using surface topography techniques for ballistic identifications as an alternative to the current technology based on image comparisons. |
| Citation: |
Measurement Science & Technology |
| Volume: |
17 |
| Pages: |
pp. 500 - 503 |
| Keywords: |
auto-correlation function;confocal microscope;cross-correlation function;standard bullet;standard reference material;topography comparison |
| Research Areas: |
Metrology, Manufacturing |
