ISSN: 0022-1198
CODEN: JFSCA
Published Online: 1 October 1982
Page Count: 5

The Use of a Scanning Monochromator as a Barrier Filter in Infrared Examinations of Documents
Noblett, MG
Special agent, U.S. Department of Justice, FBI, DC

(Received 8 January 1982; accepted 23 February 1982)

Abstract

This study indicates that a scanning monochromator can replace long-pass filters in examining questioned documents using infrared techniques. The use of the monochromator may increase the capability of the examiner to restore obliterated writings.

Keywords:
questioned documents, reflectance, monochromators

Paper ID: JFS12211J
DOI: 10.1520/JFS12211J
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