Fingerprint Technology | Electronics Seminar Topic
Fingerprint Technology
A fingerprint is an impression of the friction ridges of all
or any part of the finger. A friction ridge is a raised portion of the
epidermis on the pal mar (palm and fingers) or plantar (sole and toes) skin,
consisting of one or more connected ridge units of friction ridge skin. These
ridges are sometimes known as “dermal ridges “or “dermal papillae’.
Fingerprint may be deposited in natural secretions from the
eccrine glands present in friction ridge skin (secretions consisting primarily
of water) or they may be made by ink or other contaminants transferred from the
peaks of friction skin ridges to a relatively smooth surface such as a
fingerprint card.
The term fingerprint normally refers to impressions
transferred from the pad on the last joint of fingers and thumbs, through
fingerprint cards also typically record portions of lower joint areas of the
fingers.
Today fingerprint devices are by far the most popular form
of biometric security used, with a variety of systems on the market intended
for general and mass-market usage. Long gone are the huge bulky fingerprint
scanners; now a fingerprint-scanning device can be small enough to be
incorporated into a laptop for security.
