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Optical Engineering

Luminescence Imaging Document Analyzer
Author(s): D. Varshneya; L. A. Jeffers
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Paper Abstract

A system has been developed to investigate documents that are suspected of having been altered, forged, or erased. The system is based on the fact that each ink and paper has characteristic luminescence properties. Lasers are used to excite luminescence from the document, and the luminescence, along with its spectral distribution, is detected by a set of scanning mirrors that efficiently couple the light to a wavelength selector (monochromator) and photodiodes. Compared to previous systems, this system offers major improvements in sensitivity, versatility, and convenience of operation. These refine-ments are achieved by exploiting the capabilities of the lasers and of digital data processing/acquisition.

Paper Details

Date Published: 1 December 1986
PDF: 5 pages
Opt. Eng. 25(12) 251304 doi: 10.1117/12.7974003
Published in: Optical Engineering Volume 25, Issue 12
Show Author Affiliations
D. Varshneya, Babcock & Wilcox Company (United States)
L. A. Jeffers, Babcock & Wilcox Company (United States)

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