Fluorescence imaging of latent fingerprints with a cooled charge-coupled-device detector

Robert S. Pomeroy; Mark E. Baker; David A. Radspinner; M. Bonner Denton

doi:10.1117/12.50468

1 December 1991 Fluorescence imaging of latent fingerprints with a cooled charge-coupled-device detector

Robert S. Pomeroy, Mark E. Baker, David A. Radspinner, M. Bonner Denton

Proceedings Volume 1439, International Conference on Scientific Optical Imaging; (1991) https://doi.org/10.1117/12.50468
Event: International Conference on Scientific Optical Imaging, 1990, Georgetown, Cayman Islands

Abstract

Images of fluorescently tagged latent fingerprints were obtained using a low power source and a scientifically operated charge-coupled device (CCD) detector. The luminescence of the fingerprints is chemically enhanced with a fluorescent tag, orthophthalaldehyde. The orthophthalaldehyde undergoes a Schiff base reaction with phenyl ring containing amino acids to produce fluorescence emission at approximately equals 446 nm under UV illumination. An inexpensive, portable, low power UV source was constructed utilizing two 4-watt UV fluorescent lamps and appropriate filters. In the past, the use of filtered lamp sources resulted in an appreciable loss in sensitivity compared to laser sources. Preliminary investigations into the use of a low power tungsten filament lamp source for the excitation of NBD chloride tagged fingerprint on paper were also conducted. Sensitive detection by way of a CCD eliminates the need for the use of expensive, high power laser sources in field instruments and provides a wide range of additional advantages over photographic film.

Citation Download Citation

Robert S. Pomeroy, Mark E. Baker, David A. Radspinner, and M. Bonner Denton "Fluorescence imaging of latent fingerprints with a cooled charge-coupled-device detector", Proc. SPIE 1439, International Conference on Scientific Optical Imaging, (1 December 1991); https://doi.org/10.1117/12.50468

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