TY - GEN
T1 - Fluorescence imaging of latent fingerprints with a cooled charge-coupled-device detector
AU - Pomeroy, Robert S.
AU - Baker, Mark E.
AU - Radspinner, David A.
AU - Denton, M. B.
PY - 1992
Y1 - 1992
N2 - 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 ≈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.
AB - 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 ≈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.
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M3 - Conference contribution
AN - SCOPUS:0026678221
SN - 0819405299
T3 - Proceedings of SPIE - The International Society for Optical Engineering
SP - 60
EP - 65
BT - Proceedings of SPIE - The International Society for Optical Engineering
PB - Publ by Int Soc for Optical Engineering
T2 - International Conference on Scientific Optical Imaging
Y2 - 28 November 1990 through 1 December 1990
ER -