A - Human Necessities – 61 – B
Patent
A - Human Necessities
61
B
A61B 5/117 (2006.01) G06K 9/00 (2006.01)
Patent
CA 2202514
An apparatus for imaging skin ridges comprises a light transmissive body (1) having a surface (2) for receiving a relief pattern (3) from, for example, the pad of a finger, and a light source (4) which illuminates the surface and generates an optical image (5) of the relief pattern. A light transmissive heating element (7) is provided adjacent the surface of the body to heat the skin ridges in operation. The increase in the temperature of the skin makes it more flexible. It also promotes sweat secretion. Both factors improve the optical coupling between the finger and the surface resulting in more reliable fingerprint imaging.
Ce dispositif de mise en image des sillons de la peau comprend un corps (1) transémetteur de lumière possédant une surface (2) destinée à recevoir un motif (3) en relief, par exemple d'une pulpe digitale, ainsi qu'une source (4) lumineuse illuminant la surface et produisant une image (5) optique dudit motif. Un élément (7) chauffant émetteur de lumière est monté au voisinage de la surface du corps de sorte qu'il chauffe, lorsqu'il est utilisé, les sillons de la peau. L'augmentation de la température de la peau rend celle-ci plus souple et favorise également la sécrétion de la sueur. Ces deux facteurs améliorent le couplage optique entre le doigt et la surface, permettant ainsi de former une image plus fiable de l'empreinte digitale.
Central Research Laboratories Limited
Ridout & Maybee Llp
LandOfFree
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