Document Examination by Laser

J. P. Wilde; T. W. Sinor; K. E. Everse; E. R. Menzel

doi:10.1117/12.966945

1 January 1987 Document Examination by Laser

J. P. Wilde, T. W. Sinor, K. E. Everse, E. R. Menzel

Proceedings Volume 0743, Fluorescence Detection; (1987) https://doi.org/10.1117/12.966945
Event: OE LASE'87 and EO Imaging Symposium, 1987, Los Angeles, CA, United States

Abstract

We have assessed the ability of laser-excited fluorescence to distinguish between similar inks, as might be found in document alterations. We find that the combined use of a coating procedure that strongly increases fluorescence efficiency at room temperature and fluorescence examination at 77°K provide high discriminatory capability. The procedures are easy to use and satisfy practicality requirements essential for utilization in document sections of law enforcement agencies.

Citation Download Citation

J. P. Wilde, T. W. Sinor, K. E. Everse, and E. R. Menzel "Document Examination by Laser", Proc. SPIE 0743, Fluorescence Detection, (1 January 1987); https://doi.org/10.1117/12.966945

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