NCJ Number
218835
Journal
Forensic Science Communications Volume: 1 Issue: 3 Dated: October 1999 Pages: 1-6
Date Published
October 1999
Length
6 pages
Annotation
This paper describes and critiques the features and uses of the Video Spectral Comparator 2000 (VSC2000; Foster and Freeman, Worcestershire, United Kingdom), the FBI Laboratory's latest tool for the analysis of questioned documents.
Abstract
The VSC2000 is an imaging device that allows a document examiner to analyze inks, visualize hidden security features, and reveal alterations in a document. The VSC2000's main components are a desktop computer that uses software provided by the manufacturer and an imaging device that includes a color charge coupled device (CCD) video camera, a black-and-white CCD video camera, excitation/barrier filters, and various radiant energy sources. Among the computer's standard features are a 21-inch monitor and a readable/writable CD-ROM for storing the bitmap image files. Using variable light sources in conducting document examinations is not new; however, the VSC2000 allows the user to select filter and light combinations at the touch of a button and capture desired images faster than with conventional photography. The VSC2000 is better than earlier versions, because it has complete computer-based operations and comes with standard improved filters and light sources. This paper offers one suggestion for improving future models. The incident light source currently relies on a mirror in order to reflect light from a stationary light. A flexible, direct light source would be better. 5 references