Use of a scanning optical profilometer for toolmark characterization

L. S. Chumbley; D. J. Eisenmann; M. Morris; S. Zhang; J. Craft; C. Fisher; A. Saxton

doi:10.1117/12.825185

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22 May 2009 Use of a scanning optical profilometer for toolmark characterization

L. S. Chumbley; D. J. Eisenmann; M. Morris; S. Zhang; J. Craft; C. Fisher; A. Saxton

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Proceedings Volume 7378, Scanning Microscopy 2009; 73782D (2009) https://doi.org/10.1117/12.825185
Event: SPIE Scanning Microscopy, 2009, Monterey, California, United States

Abstract

An optical profilometer has been used to obtain 3-dimensional data for use in two research projects concerning toolmark quantification and identification. In the first study quantitative comparisons between toolmarks made using data from the optical system proved superior to similar data obtained using a stylus profilometer. In the second study the ability of the instrument to obtain accurate data from two surfaces intersecting at a high angle (approximately 90 degrees) is demonstrated by obtaining measurements from the tip of a flat screwdriver. The data obtained was used to produce a computer generated "virtual tool," which was then employed to create "virtual tool marks." How these experiments were conducted and the results obtained will be presented and discussed.

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L. S. Chumbley, D. J. Eisenmann, M. Morris, S. Zhang, J. Craft, C. Fisher, and A. Saxton "Use of a scanning optical profilometer for toolmark characterization", Proc. SPIE 7378, Scanning Microscopy 2009, 73782D (22 May 2009); https://doi.org/10.1117/12.825185

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KEYWORDS

Profilometers

Forensic science

3D scanning

Manufacturing

Statistical analysis

Surface roughness

Data processing

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