Portable fingerprint detection method and device

Details Portable fingerprint detection method and device Portable fingerprint detection method and device

1989-08-22

1991-01-08

Hannaher, Constantine

Radiant energy

Luminophor irradiation

2504591, 250341, 250504H, G01J 158, G01J 100

Patent

active

049838466

ABSTRACT:
A device and method for detecting fluorescent evidence, including fingerprints. The device and method use a pair of matched filters, a source of noncoherent light, and a light intensifier to detect the wavelength-shifted reflections from fluorescent substances. The light source and a first filter illuminate the substances with a light of predetermined band width. The second filter and the light intensifier detect and increase the luminance of the reflected light, shifted to a longer wavelength by reflection from the florescent substances. The device may be hand-held and portable.

REFERENCES:
patent: 3811777 (1974-05-01), Chance
patent: 4773097 (1988-09-01), Suzaki et al.
patent: 4794260 (1988-12-01), Asano et al.

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