NCJ Number
92526
Journal
Forensic Science International Volume: 22 Issue: 2/3 Dated: (August/September 1983) Pages: 221-230
Date Published
1983
Length
10 pages
Annotation
A simple microscope accessory, known as the interference objective, has been used to examine glass surfaces for characteristic features.
Abstract
Bulk and casework sized fragments have been inspected and gave interference fringes which provided a detailed representation of their surface topography. Preliminary studies showed that curved surfaces from tableware and bottles could be distinguished from plain sheet glass. To achieve precise sample alignment, new methods were developed for rapid sample mounting and inspection, including the construction of tilting stages and the modification of microscopes. The improvement in the rate of sample handling opens the way for casework applications and for survey work to evaluate the evidential value of the technique. (Publisher abstract)